When it was transitioning, 15 seemed like the point where it turned yellow, but when you showed the grid, it felt more like I wouldn't call it yellow until 21 or 22. The number I call yellow would probably change depending on what other colors are around it too.
That is true of everybody. Colour science has two versions, one for physicists and another for psychologists and biologists, because as soon as the brain is involved the whole perception game comes into it, and that is very important to remember when working with colour. Designers are often well aware of the psychologists'/biologists' version of colour science as they need to be. If they also work with screen and print - of course most do nowadays - they also need to be aware of the physicists' version of colour science as well.
I got the same impression. 22 was my pick on my 1st monitor and 18 was my pick on the 2nd. My first monitor is colour corrected to close as I can get for image editing. For the second laser my pick was 50 on the 1st monitor.
For me, the color test was harder than I expected. When they're displayed as a grid, I'd say that 22 is where I'd consider it a yellow. For the 2nd test, 44
14 was when I first saw yellow, 19 was when I really saw yellow. I started to see yellow coming in at 40, but like stated in the video it’s like an amber yellow-orange, definitely saw it at 44 as yellow though
This might now be my go-to video for describing how color blindness works because numbers one through 25 look exactly the same to me. There is no difference to my eyes and I haven't found a good way to explain that to people until now
That chart colour test is cool. Like everyone else once they're all on screen you would jump a few numbers up from the results when alone. I said 17 for yellow from green and 21 when together. Then 40 for yellow from red and 43 when together. Pretty amazing.
Thanks for testing these. I saw them on ebay a few months ago. I'm disappointed neither one tested as 589 as I was hoping they might be suitable for experiments with sodium absorption. No such luck being this far off I think.
To do sodium you need an EXTREMELY narrow and stable wavelength, you won't get very good results with uncooled pen lasers with a wide spectrum like this. High power fibre lasers for GSL need ~10-20W or better, extremely high beam quality, from memory around ghz linewidth, extreme stability for the wavelength required. basically 6-7 figure lasers.
Atomic physicist here - I shine lasers at atoms all day. @N4CR5 is right, it will be an extreme uphill battle with a laser pointer. I don't think it's strictly impossible. You will at minimum need to have extremely fine temperature and current control. On the cheap (and with ~weeks of effort), you can do this with Peltiers, a lot of insulation, and a homebuilt current driver (not trivial). You will definitely need to do surgery on the laser. Once this is set up, first find the absorption line with an extremely high OD vapor cell (maximum path length for high absorbance, as hot as possible to increase the Doppler linewidth). You will need fairly stable powers to get enough SNR for absorption spectroscopy. Without a wavemeter this will require a lot of trial and error to find the resonance (spectrometer is not precise enough - monochromator might be ok). Once you find the line, you can do a side-of-fringe lock to the vapor cell. If everything goes perfectly, this can probably get you down to the ~100s of MHz, which is good enough for room temperature experiments. Best of luck - it won't be easy. P.S. 591 nm might be tunable down to 589 nm via temperature. You'll need to tune the SFG crystal temperature and orientation to get good phase-matching as you do this.
@@creativity1403 Yes, if you're fine with pulsed operation. A CW dye laser is trickier for a home build (but within the realm of possibility these days). A diffraction grating as the dispersive element should get you ~GHz linewidths if done well. Even with poor spectral quality, you can probably do some interesting stuff with optical pumping and RF (1.77 GHz is reasonably accessible).
15 or 16 is where I felt it pivoted to green-yellow, but 22 is probably the first color in that group as yellow itself. For the Amber question, it definitely looks like yellow starting 43
Same here, I originally thought 19 because of the color changing, but when I saw the chart and went back to it, paused, and let my eyes adjust, the color changed. When the colors were constantly changing though it almost tricked my eyes into thinking the yellows were orange.
I think you should do the color matching both ways, because for me it always turns "yellow" earlier when you go from green to yellow than it turns "green" when going from yellow to green or when comparing them on a grid.
I felt a difference at 17 but it took me for 18 to show up to consider it as turning towards yellow. Still, maybe due to the animation, I was thinking 16 would have been the more accurate answer. Either way, this is my phone's screen and screen calibration standards are all over the place AFAIK.
Those were the same numbers for me and I’m using an iPad Pro with the mini LED screen which, being Apple and being one of the pro devices, the color calibration is known to be very good right from the factory, so either my eyes have a similar deficiency to what you have or your screens are pretty accurate at least in that region of yellows.
This video highlights an often overlooked issue that of matching the safety glasses wth the laser under test. I have never seen this issue addressed before--and a subject worthy of a video. Thanks.
Great video, thanks! 20 mW looks definitely like too much power at this wavelength. A typical problem, especially of cheaper semiconductor lasers is the inadequate NIR filter after the doubling crystal (or SFG). Meaning you get your visible light out (i.e 593 nm) but the fundamental NIR beam goes out too (1342 nm). Keep in mind that the efficiency of SFG or SHG is likely below 30% (maybe 10?). However, you can't see that while using Si spectrometer, that goes max to 1200 nm, due to Si sensitivity. To get accurate reading, you can either use a good low-pass filter, that transmits only visible and blocks all IR (1300+ nm) or use a prism to disperse the output and try to measure power on the red side, where you can't see anything (IR). I would guess, you'll measure about 15 mW of NIR photos that leaked out. And again, amazing video. I'm subscribing right now!
On an s23 ultra with the vibrant screen mode, I'd have to say 22 is what I'd consider the start of yellow. I can see the green begin to change noticeably from 12 upwards from my peripheral vision and 15 looking directly at the screen. My phones oled screen isn't in a calibrated mode and I'm a guy, so I could perhaps have color blindness. Edit: this is for the first chart
11 was where I felt it was turning yellow, 19 seemed like a lime green to me and 22 is what I’d consider yellow. As for the orange-yellow one, I knew it was turning yellow around 39, and 44 is what I’d consider yellow.
have absolutely no clue about lasers, but found your enthusiasm made me wanna check it out. really dug your method of explaining how different the colours were in your eyes. i thought 20 and 44 were yellow btw
congratulations! i used to have a 593.5nm laser from CNI a long time ago, and i still regret selling it to this day :( i saw sanwu lasers are offering pocket series lasers in that wavelength now too!! i think i might get one :) and to answer the question at 5:00, i think 20 is when it definitely becomes yellow in my eyes, and for the second test 42
Thanks! I am certainly not selling mine :) But yes, there seems to be more choices now in the yellow range. And thanks for the early watch and comment.
Personally I didn't feel like it turned yellow until 20, looking at the full grid I would call everything up to 23 "green" still. Very cool!! I'd love to see you build a simple Ulbricht sphere if it's something you're interested in making. Fantastic videos as always
@@Galf506 I get a different sense of color differentiation when looking at the grid showing all shades and the slideshow with one at a time. I feel like I can assign the new color earlier when I don't see all the others right next to it.
Number 20 was "yellow" to me, and number 40 was also "yellow." Pretty strange how I think the "amber" laser is right on the boundary. I am still quite impressed with that amber laser, and now I want one for myself (of course, I would keep it in the original packaging until I got proper laser safety glasses.)
18, and 43 are where I started viewing the color as a shade of yellow, rather than a yellow-tinged other color. To my eyes, through my screen, the first laser is definitively green, and I would definitely call the 2nd laser yellow, despite it being redder than where I drew the line in my screen test.
First test: Around number 14 it gets first yellow vibes, 18 is like half-green half-yellow, and then 22 and above are clearly yellow UPD: This was at 7300K color temperature settings (a little colder than default 6500K). At 6500K all said numbers will be by ~1 less, so 13-17-21 Second test: number 43 is still quite orange, and then 44 is already yellow enough to be called yellow.
i have a huge collection of lasers, Ive been buying several from a eBay seller, he sells lots of different wavelengths, even 574nm and 395nm pointers, its really nice seeing how inexpensive they are compared to anywhere else (i think his most expensive is 300$, but i mean for the rarer wavelengths its worth it)
That 593 pointer is gorgeous! I used peripheral vision to determine your color chart... for some reason it worked much better than when viewing directly.
Fellow collector here - it's awesome having all of these unique colors available to us now, congrats on your first yellows. Any plans to get your hands on the also new-ish 425nm and 380nm diodes?
Fascinating! Never looked at this subject or many so closely in such a short concise span.. my love for what i describe as a bright sulphur green might be explained here too..
In terms of being yellow and losing the green tint, I would say 21 crosses that boundary, but I would still choose 22 as my normal yellow. Coming out of orange, I'd call 46 or 47 a good yellow. On the screen, the second handheld laser looked a bit more orange, which looks really nice to me.
For the red to yellow one, I felt like it started really shifting towards like 40-42, and by 45-47 it was entirely yellow already. Yeah it ranking 40 doesn't seem too bad. It does look super yellow or even gold in some parts of the video.
22 for the first test, 40 for the second. I am slightly colorblind though, I can still see colors just fine, but telling two similar colors apart can be difficult for me, or sometimes I confuse one color for another that is similar, even though with regular color vision you can clearly tell they are different.
I had this industrial LED indicator that somehow can run off 230V via 1/4W resistor dropper(super low current draw, very bright at 0.1mA instead of standard 10mA), and weird thing about it is that it's green, but not like typical green LED, it just looks different, sort of more pleasant, but couldn't explain it. I think it might be from the 558nm "yellow" wavelength range like your laser. Unfortunately there was no detailed information about it because it was sold as a built up complete indicator in housing with wires not bare LED.
8 was where I started to see it, and I’d say 22 is pretty firmly yellow, albeit very green yellow. Exact usage depends on context though, because colors used within an image are somewhat relative to each other. 44-46 is what I would say can claimed as yellow, at least in isolation.
I work as the lead as an optical engineer for a company where we make 589 solid state Lasers. up to 5 w of power. the company is called Advalight, but the machine is quite a lot bigger.
For me, colors from 1 - 10 are definitely green, and colors from 21-25 are yellow. However, I really struggle in between, as they seems more greenish than yellowish to me.
Same here, there is yellow but green is too strong to call it yellow. From the 13th to 18th I see more of the yellow but it is still green to me. Trully yellow in my opinion would be 21st to 25th
My experience with import "wall-warts" is hit and miss, particularly for the higher current rated ones, where a 3A rating often barely pushes 2A. I suggest a Meanwell power brick. They've been very reliable for high currents.
The perception of color is not only influenced by brightness or color settings of the display. It highly depends on the surroundings, your "training" in colors, and even the context you see it in. Brown and orange can be the same color, it only depends where we see it if we call it brown or orange (ofc not in the extremes). A slightly lime colored lemon can be called green because it deviates so much more into the green spectrum than a ripe, yellow lemon. I got the transition from lime to yellow at about 20. transition from orange to ocher at 45, if you count ocher as yellow, but real yellow I would only call at 48.
As a color-blind person, I was shocked to see that even number 1 looked yellow to me, apparently the brighter the green the more yellow it looks for me even though 1 should be a perfect green
something interesting with that amber one - i was messing around with some LEDs once and put a green one directly over a 9V battery and observed a similar effect, it was very briefly green and then turned orange. I'm not sure what relevance this has to that laser as i imagine overdriving its light source for extended periods of time would kill it very quickly, but i figured it was something to note
Man, when I was a kid I used to stare right into the beam of the red laser pointers you could buy at the store. Never put into consideration just how dangerous that actually was
i accidently stared into a 5mW green laser that i cranked up the potentiometer on as a kid, i still have a small burn spot on my retina in my left eye too this day.... unless i close my right and look for it i dont notice it, only time i notice it is when i go to the optometerist and i have to test each eye individually, the spot is close to center of my vision so it can cover the letter im looking at
A yellow laser (or at least one that looks like it) has been used at the observatory in Hawaii. The reason for it is what's known as a "guide star", to minimize or maybe even eliminate atmospheric distortion that can cause distant objects to look fuzzy and blurry. The laser is literally able to zap a thin slice of atmosphere, and the mirror of the telescope is able to distort in a way as to be able to counteract effects of the atmospheric distortion. Pretty interesting stuff.
The yellow touch became visible around 13, but a true yellow perception started to kick in around 15-18. Because we started from green i might be biased, you could test it the other way around, starting from yellow and asking for a stop of the yellow perception and average the results of both tests.
They have been available for years but been too expensive for me. Making other, much more powerful laser colors more interesting to me ;) Thanks for the early watch!
An interesting video overall! I do want to see you building an Ulbricht sphere, mainly due to my curiosity. 22, on the first test, was when the screen became yellow. I was debating 18, but it looks more like a light green there. For the second test, 44 or 45 is where I see it turning completely yellow. Perhaps one day, we will see the legendary true yellow 580(?)nm laser.
I have an old OCLI variable (dichroic) filter (400 to 700 nm), and I've considered the yellowest spectral color to be somewhere between 575 and 585 nm. This is right between those laser wavelengths, so I'm not surprised that the 561 nm one looks quite greenish (I'd call it a "lime" color), while 591 nm is a tad on the warm side of yellow. In practice of course, what we normally consider "yellow" is very broadband, including red through green light, as in the additive red-green-blue color sources, such as with computer and TV screens.
I could definitely see a difference in color around the number 4 and I would say what I would call yellow starts at 13 or 14. I love all the videos you make. They’re all so well made and always hold my attention from start to finish ❤ You have a fan in me all the way from St. Louis, Missouri 🤩😁. Have a wonderful day!!! ❤
Same but I can understand why it seems green. Our atmosphere has a good amount of oxygen which shifts all visible light towards blue (which is why the sky and water is blue)
Thank you for the work put into these. My comparison for Orange is 589nm from Sodium. So while these are still exciting for laser pointers with Orange and Lime colours. Getting nice Yellow laser pointer is still an interesting goal.
Number 5 for me had the first signs of yellow to me, I know I have very sensitive eyes but I didn't realize that my eyes were that sensitive and going from red to yellow I started seeing a difference towards yellow on the fourth color. I have Hyper photo sensitivity which has both benefits and problems, like the ability to see IR/UV but I also have trouble with bright lights and my skin is affected too. This tells me quite a bit about what I'm seeing and just how good my eyes are.
for me it took me a long time to figure it out. first chart: in 15~16 i started seeing a bit of yellow, then in 20 most was yellow and a bit of green, and in 22 it was fully yellow. second chart: in 37 it changed to orange and in 41~42 it was fully yellow
I have the same golden laser pointer. I find it uses up batteries a lot quicker, when the batteries are less than optimal the laser pointer takes a while to “warm up” before turning on. The batteries still read 1.5v but have dropped from 1.6v and the laser stops working. Power hungry.
Honestly, 14 is where it seemed good enough to qualify as 'yellow', though looking at it in the spread with the rest shook my confidence. It definitely is greenish, but i'd put it in that pretty green 'highlighter yellow' area. I wouldn't say anything earlier is primarily yellow. Edit: For the second test, i'd say about 38 or 39 could be yellow. Shocked me again when it was in the full spread. But comparing to the traffic light situation, i'd definitely call that 'amber' a shade of yellow, so I suppose my first intuition was correct.
@@4rumani Maybe you should make your own comment with your own opinion then. He asked for people to reply honestly based on their eyes, and their opinions, and their computer screens. Whining about others who're different on that front when they're responding to an experiment of said kind is not only annoying, it's counterproductive. Have a nice day.
16 and 40 for my eyes. But I’ve been a VFX artist for 13 years. Where pixel peeping and colour matching different assets did teach me to see colours differently. I do love that second yellow laser, yes you would say it looks more amber because it’s definitely warmer but it’s a very pleasant colour to me. It’s reminiscent of the yellow LEDs.
@@vasili1207 yeah then too you see very nuanced colour differences. To me it was a weird awareness, when I started SFX (I transitioned into VFX through that) I noticed how much olive green and yellow there’s in skin tones. You think it’s a lot of pinks and reds but it’s a lot less. I also do SFX makeup so making silicone prosthetics and blending it with the skin. It’s fascinating when you feather colors the untrained eyes get deceived but we definitely see the feathering and the gradient transitions. But I find it a lot harder in real life to match colors than doing it in VFX. Where measuring an area gives you the nice RGB averages and you can just easily push the sliders to match those values 🤣 As you know with model painting it’s a hell of a lot harder. And paints on a surface look different than in the mixing container when they are still wet. I have a video where I make bullet wounds on the cheap for a short film sequence in a documentary. The cheap gelatin prosthetics are a pain to paint.
@@CallousCoder same here lol over a decade in the laser biz ;) colour perception for people like us is ridiculously honed compared to normal people. I can look at a colour and tell what frequency it is typically.
For me, 16 was starting to be at the point where i'd say it could be considered as yellow. By 20 it would be undeniable that it's yellow. Although I was surprised to see the chart after 😅
Friendly reminder that your monitor is most likely RGB (unless you have one of those fancy ones with yellow pixels too), thus colors will look different (on my tv, yellow from the first looks Chartreuse, and from the second looks amber).
17 is the first one that turned noticeably yellow-tinted to me, but the first one that I'd call actually yellow is at 22. 42 is the first that I'd call yellow-orange, and 45 is the first that looks predominantly yellow. Fascinating!
Your eye sees the color in contrast with what surrounds it so the number of changes when you go from looking at it full screen for one color to the frame that has everything laid out in the grid
Since i'm watching using HDR on i'd say since the 11 it starts losing the green color, by 16 it starts the transition between green and yellow and by 21 it's already more noticeable the yellow color over the green one.
for me, i would say 18 is where it changed from green/yellow that is mostly green to a yellow/green that is mostly yellow and i would classify it as a yellow if i had to define it based on the colors of the rainbow. on the 2nd test, 42 is where it flipped from orange/yellow to a yellow/orange.
20 and 42 were where the screen started looking yellow to me. when side-by-side with the other colours, though, they look a lot less yellow than they do on their own. it's interesting how colours can affect how we perceive the other colours around them like that.
turned yellow at 11. I felt green changed. really big change at 13. I used to do car paint matching jobs by mixing colors. one drop makes a huge difference in 1000ml paint.
Where do you get the info about the routes used to output different laser wavelenghts? I cant find on the internet for the more exotic ones. Or can you make a video detailing how each visible laser wavelength is generated?
When they were going across the screen for me it was 18, but when all were shown I was surprised to see 18 still looked really green finding 22 to be the start of the yellow. Light spectrum is wild.
WHOA.. That INFINITER pen was my first laser pointer too!! I'm so proud owning that in 1996 (Primary school!).. brings back a lot of memories :')... Too bad I finally scratched the lens when I tried to clean it with a cotton ball and paperclip (one of the most devastating moment of my life back then). The laser dot was round, I haven't yet found another red laser diode with such perfect shape (all of them was square-ish).
Interesting. On that test in sequence; I felt like around 15 was where I’d say it was turning yellow, but when all of the colour cards were shown together, that looked very green still so just goes to show. Same with the other, where 40 was my tipping point but clearly not when compared to all of the cards.
For me, in the sequential show it is around 16 or 17 to be called slightly yellowish The first tinge of yellow is at 15 The 20 and above are DEFINITELY yellow
For me 18 was where I started thinking of it as yellow. And 44 for the other transitions. The really interesting challenge for me would be when I'd start making the same colors as green or red when starting at yellow.
Fun Facts: Color perception is heavily influenced by language! Yes the language you grew up speaking actually effects the way you perceive the world. There's a famous test for this. There are languages that do not have unique words for the colors green and blue (they instead have a single word meaning bluish-green that expands the entire blue and green spectrum). If you show them 10 bluish-green circle with one being ever so slightly different, they have a hard time finding the different one. But for English speakers its like near instant. However there's an inverse test. I don't know if its the same language but there's a language that has several different unique names for green (there is no just "green" color). You do the same test with 10 green circles with one being slightly different color and they see it instantly. However, because we English don't often use unique names for the various greens, we have an extremely hard time spotting the circle that's ever so slightly different. Here are a few more examples: If you take the color blue and lighten it, you'll see the new color as light blue (duh right! though you might give it the name sky blue or something like that you wouldn't argue its still light blue). We don't really have a strong name for light blue. Colors like sky blue aren't well defined in our English language. However if you lighten the color red, you don't get light red (I mean there are some hues of red and depending on how much you lighten it you might find a color you'd call light red). But seriously pink is just a light red. However we often call pink as being a separate color, distinct from red. It's not though! Its literally what happens to red paint when you mix in a lot of white paint. (Just like light blue is). Alright what about the inverse of darkening blue? We get dark blue. No real unique name for it. But what do you get when you darken orange? You get brown. Yes! In the exact same way that blue becomes dark blue, orange becomes brown. Even if its not that dark. If you see someone with dark blue jeans, you still say they are a blue color. However if you see someone with brown paints, have you ever saw them as orange?
17 and 42. 17 reminded me of what the wild grass in the high desert starts to look in the summer. And 42 is when I'd start to say it's more like a lemon than an orange.
when looking at all the colours side by side, 20 is the first colour that looks properly yellow but when watching them change in sequence 13 is the first one to show become yellowish and 18 to become yellow
Pro tip: try to film the laser comparison with the different cameras available in the household including different cell phones (front and rear cameras), old phones with 1.3MP cameras, webcams, DVRs, old camcorders, action cams, CCTV, etc. Some of them will pick up 561nm as pure green, some as greenish yellow or even pure yellow. This is because of the different pigments used in CCD/CMOS sensors and different color sensitivity and color balancing methods.
I would say that 20 and 40 are the first colors I see as yellow sequentially, though when looking at all colors together it's more like 24 and 46. Though looking at the laser points, I might actually call the redder one yellow (the other is lime).
5:05 I started seeing glimpses of yellow at 11, but when I paused and looked away for a moment, then the number 11 looked more yellow green, or grass green. I would consider 14 to be on the edge. Depending on the surroundings, it could be perceived as both green or yellow. 15 starts to look more yellow than green, even after rest, - if this was grass, then it would definitely be unhealthy, yellow grass. Since 18 it is slightly-greenish-yellow, 20 is tinted yellow and since 22 it's just yellow.
For me it turned yellow at 25. I am a little picky about colours like cyans, yellows and magenta's though. The second laser is decidedly orange(or amber, i suppose).
With the yellow number count, I tried to look away from the screen and do a quick glance each time it went up in number to avoid a kind of retina burn in and I would say 20 and 45 were where I think it would have been acceptable to call it a yellow.
Funny thing is I searched for yellow laser pointers on ebay less than a month ago as purchased my first decent quality pointer this year, a 405nm as violet is my fav colour for a light source. I absolutely love it! I don't care for any other colours as I feel I have lost interest since RGB has been a thing. Anyway, no yellow lasers came up in my search so I assumed they didn't exist in pointer form factor. Then this video came up and I was like hell yeah! Now they come up on ebay. Talk about timing! I really like the amber colour as it feels like it's not played out like the common R, G, B colours. I ended up buying a bunch of random odd colour LEDs when I was in need of a self flashing amber LED for my car dash warning light recently, and the min order was 10 bucks. I got some really weird colours to fill the order, lime green which looks teal to me and my fav is a hot pink LED. Both of those would be awesome as a laser pointer colour.
Up until 11 I think the yellow is undetectable to my eyes, but after that it becomes obvious with every step. But 31 is where I start detecting a difference starting from the red, shows how much more sensitive to green our eyes are.
16 was the shade I initially saw as yellow, but perhaps that was due to seeing the evolution from 532 green. When you showed the chart, 20 was more like where a true yellow appears. $115 sees like a lot for a laser pointer of rather generic build. I can remember these costing just a few dollars in late 90s Hong Kong, albeit of the 532 green variety.
4:43, on the test thing I picked 17 as the mark for Yellow, 11 was where it started to change From Green to Yellow.. (but I'd say around 25 is a true Yellow) 6:38 I picked 39 as the mark for Yellow (but I'd say 45 is True Yellow) it started transitioning from Red to Orange at 30, and hit Orange at 35.
I wonder if the amber one is not just a green and a red laser diode / beam stacked on top of each other…? Might also explain why the green fires first…? Or would the spectrometer have been able to detect two peaks in the green and red wavelengths?
19 and 42 in the initial sequence, but on the all up comparison charts I'd go with 22 and 48. Not sure if that means anything, I'd love to see the sequence in reverse and see what I picked there.
i first noticed yellow at around 12 or 13. by 18 it was definitely more yellow than green. at 19 or so, i would say it gets fully yellow. for me and my monitor! then I actually said "40" out loud on the second test. 40 or 41. Same as you! what a cool video!
5:04 noting where the screen turns yellow is going to be all over the place because every different device and brightness setting and viewing condition will impact how it is viewed. However, I have mildly Tritanomalous vision and did not see non-green yellow until 25.
Freaky. 16 and 40 were where I started seeing a lot of yellow, so those were the numbers I picked as they appeared. And that happened to match the lasers. So yay, I have laser vision! Afterward of course, those numbers are definitely not yellow (though they do contain more yellow than green/red). They just show a lot more yellow in the moment when training your eyes on red or green at the start of each test. It makes for a very neat optical illusion however. I'd be curious to see if you focus both lasers at the same point, could they show that true yellow you've been searching for? And if so, could it be done with a combination of your prior lasers as well?
i squinted my eyes during the "what number does it turn yellow" and got 8, then unsquinted my eyes and it took until 19 for it to register as yellow again. kind of inchresting then 39 but no difference from unsquinting
Green->Yellow: 20 is þe earliest frame I'd consider it more yellow þan green. Red->Yellow: 42 is þe earliest I'd consider more yellow þan orange. Yellow is my favorite color so I feel my opinions on it are fairly strong.
When it was transitioning, 15 seemed like the point where it turned yellow, but when you showed the grid, it felt more like I wouldn't call it yellow until 21 or 22. The number I call yellow would probably change depending on what other colors are around it too.
Same here
That is true of everybody. Colour science has two versions, one for physicists and another for psychologists and biologists, because as soon as the brain is involved the whole perception game comes into it, and that is very important to remember when working with colour. Designers are often well aware of the psychologists'/biologists' version of colour science as they need to be. If they also work with screen and print - of course most do nowadays - they also need to be aware of the physicists' version of colour science as well.
Same here.
I got the same impression. 22 was my pick on my 1st monitor and 18 was my pick on the 2nd. My first monitor is colour corrected to close as I can get for image editing. For the second laser my pick was 50 on the 1st monitor.
Similar: 18 standalone, 21 grid
Edit:
42, 44 on the red side.
I felt color 14 had the first sign of a yellow tinge, while 19 veers over the yellow green line and into yellow. Loving the video so far!
Saw the first yellows at 37, with yellow achieved at 44!
I had 14 as well.
This actually. Exactly the same here
Same
Same here
never in my life i'd think i'd see someone so enthusiastic about lights.. as this man is
How bout @styropyro ?
For me, the color test was harder than I expected.
When they're displayed as a grid, I'd say that 22 is where I'd consider it a yellow.
For the 2nd test, 44
This
Exactly the same in my mind as well. Anything less was more green or red than yellow. I called them out when the color count was happening to boot.
14 was when I first saw yellow, 19 was when I really saw yellow. I started to see yellow coming in at 40, but like stated in the video it’s like an amber yellow-orange, definitely saw it at 44 as yellow though
that possibly, the reason why, high end professional video kit, cost big bucks and you phone or computer monitor did not? 🙂
Same here
This might now be my go-to video for describing how color blindness works because numbers one through 25 look exactly the same to me. There is no difference to my eyes and I haven't found a good way to explain that to people until now
intriguing.......and what about coming from the red direction?
Thank you for explaining!
Same here, do you have daltonism? When he showed the graph I see yellow much more to the orange side.
@@ryuguy032197 I could actually distinguish between red and yellow, but I think that's because he took larger steps between the pictures
@@forton615 I have both the major color blindness types at the same time which is not really fun.
Red-green and blue-yellow at the same time
That chart colour test is cool. Like everyone else once they're all on screen you would jump a few numbers up from the results when alone. I said 17 for yellow from green and 21 when together. Then 40 for yellow from red and 43 when together.
Pretty amazing.
Thanks for testing these. I saw them on ebay a few months ago. I'm disappointed neither one tested as 589 as I was hoping they might be suitable for experiments with sodium absorption. No such luck being this far off I think.
To do sodium you need an EXTREMELY narrow and stable wavelength, you won't get very good results with uncooled pen lasers with a wide spectrum like this. High power fibre lasers for GSL need ~10-20W or better, extremely high beam quality, from memory around ghz linewidth, extreme stability for the wavelength required. basically 6-7 figure lasers.
Atomic physicist here - I shine lasers at atoms all day. @N4CR5 is right, it will be an extreme uphill battle with a laser pointer. I don't think it's strictly impossible.
You will at minimum need to have extremely fine temperature and current control. On the cheap (and with ~weeks of effort), you can do this with Peltiers, a lot of insulation, and a homebuilt current driver (not trivial). You will definitely need to do surgery on the laser. Once this is set up, first find the absorption line with an extremely high OD vapor cell (maximum path length for high absorbance, as hot as possible to increase the Doppler linewidth). You will need fairly stable powers to get enough SNR for absorption spectroscopy. Without a wavemeter this will require a lot of trial and error to find the resonance (spectrometer is not precise enough - monochromator might be ok). Once you find the line, you can do a side-of-fringe lock to the vapor cell. If everything goes perfectly, this can probably get you down to the ~100s of MHz, which is good enough for room temperature experiments.
Best of luck - it won't be easy.
P.S. 591 nm might be tunable down to 589 nm via temperature. You'll need to tune the SFG crystal temperature and orientation to get good phase-matching as you do this.
Love your uploads
@SamuelLiJ do you think a dye laser could work for this application, it's the only not incredibly costly option i could think of
@@creativity1403 Yes, if you're fine with pulsed operation. A CW dye laser is trickier for a home build (but within the realm of possibility these days). A diffraction grating as the dispersive element should get you ~GHz linewidths if done well. Even with poor spectral quality, you can probably do some interesting stuff with optical pumping and RF (1.77 GHz is reasonably accessible).
15 or 16 is where I felt it pivoted to green-yellow, but 22 is probably the first color in that group as yellow itself. For the Amber question, it definitely looks like yellow starting 43
same exact answer tbh
Same here, I originally thought 19 because of the color changing, but when I saw the chart and went back to it, paused, and let my eyes adjust, the color changed. When the colors were constantly changing though it almost tricked my eyes into thinking the yellows were orange.
i agree
I think you should do the color matching both ways, because for me it always turns "yellow" earlier when you go from green to yellow than it turns "green" when going from yellow to green or when comparing them on a grid.
I felt a difference at 17 but it took me for 18 to show up to consider it as turning towards yellow. Still, maybe due to the animation, I was thinking 16 would have been the more accurate answer. Either way, this is my phone's screen and screen calibration standards are all over the place AFAIK.
same! felt like a sudden switch at 17 for me, while it was kind of the same before. really interesting!
Those were the same numbers for me and I’m using an iPad Pro with the mini LED screen which, being Apple and being one of the pro devices, the color calibration is known to be very good right from the factory, so either my eyes have a similar deficiency to what you have or your screens are pretty accurate at least in that region of yellows.
This video highlights an often overlooked issue that of matching the safety glasses wth the laser under test. I have never seen this issue addressed before--and a subject worthy of a video. Thanks.
Great video, thanks!
20 mW looks definitely like too much power at this wavelength. A typical problem, especially of cheaper semiconductor lasers is the inadequate NIR filter after the doubling crystal (or SFG). Meaning you get your visible light out (i.e 593 nm) but the fundamental NIR beam goes out too (1342 nm). Keep in mind that the efficiency of SFG or SHG is likely below 30% (maybe 10?). However, you can't see that while using Si spectrometer, that goes max to 1200 nm, due to Si sensitivity.
To get accurate reading, you can either use a good low-pass filter, that transmits only visible and blocks all IR (1300+ nm) or use a prism to disperse the output and try to measure power on the red side, where you can't see anything (IR). I would guess, you'll measure about 15 mW of NIR photos that leaked out.
And again, amazing video. I'm subscribing right now!
On an s23 ultra with the vibrant screen mode, I'd have to say 22 is what I'd consider the start of yellow. I can see the green begin to change noticeably from 12 upwards from my peripheral vision and 15 looking directly at the screen.
My phones oled screen isn't in a calibrated mode and I'm a guy, so I could perhaps have color blindness.
Edit: this is for the first chart
what about the most advanced xoami phone
I think the bigger limiting factor than the phone screen is the compressed colorspace you have on UA-cam.
I also have an s23 ultra so nice failure to flex. I have colorblindness
@@Tristand09dude, we don't care.
@@ireallyreallyreallylikethisimg ikr? Neither do i! Thanks for pointing out the obvious
11 was where I felt it was turning yellow, 19 seemed like a lime green to me and 22 is what I’d consider yellow.
As for the orange-yellow one, I knew it was turning yellow around 39, and 44 is what I’d consider yellow.
I’m close to you. 12 for me. But when I saw all the colors lined up it was 16.
have absolutely no clue about lasers, but found your enthusiasm made me wanna check it out. really dug your method of explaining how different the colours were in your eyes. i thought 20 and 44 were yellow btw
congratulations! i used to have a 593.5nm laser from CNI a long time ago, and i still regret selling it to this day :( i saw sanwu lasers are offering pocket series lasers in that wavelength now too!! i think i might get one :) and to answer the question at 5:00, i think 20 is when it definitely becomes yellow in my eyes, and for the second test 42
Thanks! I am certainly not selling mine :) But yes, there seems to be more choices now in the yellow range. And thanks for the early watch and comment.
Personally I didn't feel like it turned yellow until 20, looking at the full grid I would call everything up to 23 "green" still. Very cool!! I'd love to see you build a simple Ulbricht sphere if it's something you're interested in making. Fantastic videos as always
Same for me
same here, 20 is ok, 21 is yellow
@@Galf506 I get a different sense of color differentiation when looking at the grid showing all shades and the slideshow with one at a time. I feel like I can assign the new color earlier when I don't see all the others right next to it.
Number 20 was "yellow" to me, and number 40 was also "yellow." Pretty strange how I think the "amber" laser is right on the boundary. I am still quite impressed with that amber laser, and now I want one for myself (of course, I would keep it in the original packaging until I got proper laser safety glasses.)
How, I wouldn't be able to resist opening it up, seeing what's possible to crank the power up and burning things with it. To hell with eyesight.
18, and 43 are where I started viewing the color as a shade of yellow, rather than a yellow-tinged other color. To my eyes, through my screen, the first laser is definitively green, and I would definitely call the 2nd laser yellow, despite it being redder than where I drew the line in my screen test.
First test: Around number 14 it gets first yellow vibes, 18 is like half-green half-yellow, and then 22 and above are clearly yellow
UPD: This was at 7300K color temperature settings (a little colder than default 6500K). At 6500K all said numbers will be by ~1 less, so 13-17-21
Second test: number 43 is still quite orange, and then 44 is already yellow enough to be called yellow.
i have a huge collection of lasers, Ive been buying several from a eBay seller, he sells lots of different wavelengths, even 574nm and 395nm pointers, its really nice seeing how inexpensive they are compared to anywhere else (i think his most expensive is 300$, but i mean for the rarer wavelengths its worth it)
That 593 pointer is gorgeous!
I used peripheral vision to determine your color chart... for some reason it worked much better than when viewing directly.
I'm partially colorblind, and frequently use my peripheral vision to identify colors.
Fellow collector here - it's awesome having all of these unique colors available to us now, congrats on your first yellows. Any plans to get your hands on the also new-ish 425nm and 380nm diodes?
Fascinating! Never looked at this subject or many so closely in such a short concise span.. my love for what i describe as a bright sulphur green might be explained here too..
In terms of being yellow and losing the green tint, I would say 21 crosses that boundary, but I would still choose 22 as my normal yellow. Coming out of orange, I'd call 46 or 47 a good yellow. On the screen, the second handheld laser looked a bit more orange, which looks really nice to me.
I think it's just brilliant that people go out of their way to make such a in-depth video. 👏👏
For the red to yellow one, I felt like it started really shifting towards like 40-42, and by 45-47 it was entirely yellow already.
Yeah it ranking 40 doesn't seem too bad. It does look super yellow or even gold in some parts of the video.
22 for the first test, 40 for the second. I am slightly colorblind though, I can still see colors just fine, but telling two similar colors apart can be difficult for me, or sometimes I confuse one color for another that is similar, even though with regular color vision you can clearly tell they are different.
It would be interesting to see the color test in both directions. My gut feeling tells me that the results will be different.
I had this industrial LED indicator that somehow can run off 230V via 1/4W resistor dropper(super low current draw, very bright at 0.1mA instead of standard 10mA), and weird thing about it is that it's green, but not like typical green LED, it just looks different, sort of more pleasant, but couldn't explain it.
I think it might be from the 558nm "yellow" wavelength range like your laser.
Unfortunately there was no detailed information about it because it was sold as a built up complete indicator in housing with wires not bare LED.
8 was where I started to see it, and I’d say 22 is pretty firmly yellow, albeit very green yellow. Exact usage depends on context though, because colors used within an image are somewhat relative to each other. 44-46 is what I would say can claimed as yellow, at least in isolation.
I'm looking forward to seeing the final laser again once you've got a 3 amp adapter. Maybe 12v2a is too low for the maximum output?
I work as the lead as an optical engineer for a company where we make 589 solid state Lasers. up to 5 w of power. the company is called Advalight, but the machine is quite a lot bigger.
For me, colors from 1 - 10 are definitely green, and colors from 21-25 are yellow. However, I really struggle in between, as they seems more greenish than yellowish to me.
Same here, there is yellow but green is too strong to call it yellow. From the 13th to 18th I see more of the yellow but it is still green to me.
Trully yellow in my opinion would be 21st to 25th
I think the ones between look just lime green. Which is technically green, not yellow
My experience with import "wall-warts" is hit and miss, particularly for the higher current rated ones, where a 3A rating often barely pushes 2A. I suggest a Meanwell power brick. They've been very reliable for high currents.
The perception of color is not only influenced by brightness or color settings of the display. It highly depends on the surroundings, your "training" in colors, and even the context you see it in. Brown and orange can be the same color, it only depends where we see it if we call it brown or orange (ofc not in the extremes). A slightly lime colored lemon can be called green because it deviates so much more into the green spectrum than a ripe, yellow lemon.
I got the transition from lime to yellow at about 20. transition from orange to ocher at 45, if you count ocher as yellow, but real yellow I would only call at 48.
As a color-blind person, I was shocked to see that even number 1 looked yellow to me, apparently the brighter the green the more yellow it looks for me even though 1 should be a perfect green
I dont like this game. >:( All squares are thze same colour.
Me too. They're all yellow but with varying lightness and intensities
Those poor colorblind people
It do be sucky
something interesting with that amber one - i was messing around with some LEDs once and put a green one directly over a 9V battery and observed a similar effect, it was very briefly green and then turned orange. I'm not sure what relevance this has to that laser as i imagine overdriving its light source for extended periods of time would kill it very quickly, but i figured it was something to note
Man, when I was a kid I used to stare right into the beam of the red laser pointers you could buy at the store. Never put into consideration just how dangerous that actually was
i accidently stared into a 5mW green laser that i cranked up the potentiometer on as a kid, i still have a small burn spot on my retina in my left eye too this day.... unless i close my right and look for it i dont notice it, only time i notice it is when i go to the optometerist and i have to test each eye individually, the spot is close to center of my vision so it can cover the letter im looking at
it's totally understandable that as a kid you would do this but what I don't understand is why no adults stopped you 😂😂
@@moosehead4497 same thing happen to me
@@TchSktch properly because most adults think something like a "flashlight in color" bought at the store can't be dangerous
I also remember back then i didn't know the dangers of lasers.. Now today i have multiple keychain lasers and all of them are 5mW.
Great Video as always!
I personally reeeeeaaaly liked the 593nm laser. Such a beautiful color 😍
(Still too expensive for me though hahaha)
14 Yellow-Green
22-23 Yellow
29-30 Red-Orange
32-33 Orange
36-37 Yellow-Orange
38-39 Yellow
I love your danish accent, it's so cozy, and not as annoying as most other destinct danish accents
A yellow laser (or at least one that looks like it) has been used at the observatory in Hawaii. The reason for it is what's known as a "guide star", to minimize or maybe even eliminate atmospheric distortion that can cause distant objects to look fuzzy and blurry. The laser is literally able to zap a thin slice of atmosphere, and the mirror of the telescope is able to distort in a way as to be able to counteract effects of the atmospheric distortion. Pretty interesting stuff.
Active Optics. Gotta love that stuff!
The yellow touch became visible around 13, but a true yellow perception started to kick in around 15-18. Because we started from green i might be biased, you could test it the other way around, starting from yellow and asking for a stop of the yellow perception and average the results of both tests.
Ive had a yellow DPSS laser for years. Guess they got hard to find for a while
They have been available for years but been too expensive for me. Making other, much more powerful laser colors more interesting to me ;) Thanks for the early watch!
An interesting video overall! I do want to see you building an Ulbricht sphere, mainly due to my curiosity.
22, on the first test, was when the screen became yellow. I was debating 18, but it looks more like a light green there.
For the second test, 44 or 45 is where I see it turning completely yellow.
Perhaps one day, we will see the legendary true yellow 580(?)nm laser.
I have an old OCLI variable (dichroic) filter (400 to 700 nm), and I've considered the yellowest spectral color to be somewhere between 575 and 585 nm. This is right between those laser wavelengths, so I'm not surprised that the 561 nm one looks quite greenish (I'd call it a "lime" color), while 591 nm is a tad on the warm side of yellow. In practice of course, what we normally consider "yellow" is very broadband, including red through green light, as in the additive red-green-blue color sources, such as with computer and TV screens.
I could definitely see a difference in color around the number 4 and I would say what I would call yellow starts at 13 or 14.
I love all the videos you make. They’re all so well made and always hold my attention from start to finish ❤
You have a fan in me all the way from St. Louis, Missouri 🤩😁. Have a wonderful day!!! ❤
Same but I can understand why it seems green. Our atmosphere has a good amount of oxygen which shifts all visible light towards blue (which is why the sky and water is blue)
Nifty ! I wonder if they will take as long to come down in price as they did to develop in the 1st place . I'll be waiting for < $100
Thank you for the work put into these. My comparison for Orange is 589nm from Sodium.
So while these are still exciting for laser pointers with Orange and Lime colours. Getting nice Yellow laser pointer is still an interesting goal.
Number 5 for me had the first signs of yellow to me, I know I have very sensitive eyes but I didn't realize that my eyes were that sensitive and going from red to yellow I started seeing a difference towards yellow on the fourth color. I have Hyper photo sensitivity which has both benefits and problems, like the ability to see IR/UV but I also have trouble with bright lights and my skin is affected too. This tells me quite a bit about what I'm seeing and just how good my eyes are.
u see IR and UV??
I saw it change around 8
for me it took me a long time to figure it out.
first chart: in 15~16 i started seeing a bit of yellow, then in 20 most was yellow and a bit of green, and in 22 it was fully yellow.
second chart: in 37 it changed to orange and in 41~42 it was fully yellow
I have the same golden laser pointer. I find it uses up batteries a lot quicker, when the batteries are less than optimal the laser pointer takes a while to “warm up” before turning on. The batteries still read 1.5v but have dropped from 1.6v and the laser stops working. Power hungry.
Honestly, 14 is where it seemed good enough to qualify as 'yellow', though looking at it in the spread with the rest shook my confidence. It definitely is greenish, but i'd put it in that pretty green 'highlighter yellow' area.
I wouldn't say anything earlier is primarily yellow.
Edit: For the second test, i'd say about 38 or 39 could be yellow. Shocked me again when it was in the full spread. But comparing to the traffic light situation, i'd definitely call that 'amber' a shade of yellow, so I suppose my first intuition was correct.
14 isn't even remotely yellow
@@4rumani Maybe you should make your own comment with your own opinion then. He asked for people to reply honestly based on their eyes, and their opinions, and their computer screens.
Whining about others who're different on that front when they're responding to an experiment of said kind is not only annoying, it's counterproductive. Have a nice day.
It's Chartreuse.
16 and 40 for my eyes. But I’ve been a VFX artist for 13 years. Where pixel peeping and colour matching different assets did teach me to see colours differently. I do love that second yellow laser, yes you would say it looks more amber because it’s definitely warmer but it’s a very pleasant colour to me. It’s reminiscent of the yellow LEDs.
i paint models and i seen transition between 10 -11 also i do blender but not vfx
@@vasili1207 yeah then too you see very nuanced colour differences. To me it was a weird awareness, when I started SFX (I transitioned into VFX through that) I noticed how much olive green and yellow there’s in skin tones. You think it’s a lot of pinks and reds but it’s a lot less. I also do SFX makeup so making silicone prosthetics and blending it with the skin. It’s fascinating when you feather colors the untrained eyes get deceived but we definitely see the feathering and the gradient transitions.
But I find it a lot harder in real life to match colors than doing it in VFX. Where measuring an area gives you the nice RGB averages and you can just easily push the sliders to match those values 🤣
As you know with model painting it’s a hell of a lot harder. And paints on a surface look different than in the mixing container when they are still wet.
I have a video where I make bullet wounds on the cheap for a short film sequence in a documentary. The cheap gelatin prosthetics are a pain to paint.
@@CallousCoder same here lol over a decade in the laser biz ;) colour perception for people like us is ridiculously honed compared to normal people. I can look at a colour and tell what frequency it is typically.
@@N4CR you do laser projection shows? Must be so cool playing with lasers and getting paid for that.
For me, 16 was starting to be at the point where i'd say it could be considered as yellow. By 20 it would be undeniable that it's yellow.
Although I was surprised to see the chart after 😅
Friendly reminder that your monitor is most likely RGB (unless you have one of those fancy ones with yellow pixels too), thus colors will look different (on my tv, yellow from the first looks Chartreuse, and from the second looks amber).
Different from what?
Spoiler alert: It’s Green
Damn you
It's Blue
17 is the first one that turned noticeably yellow-tinted to me, but the first one that I'd call actually yellow is at 22.
42 is the first that I'd call yellow-orange, and 45 is the first that looks predominantly yellow.
Fascinating!
Your eye sees the color in contrast with what surrounds it so the number of changes when you go from looking at it full screen for one color to the frame that has everything laid out in the grid
Since i'm watching using HDR on i'd say since the 11 it starts losing the green color, by 16 it starts the transition between green and yellow and by 21 it's already more noticeable the yellow color over the green one.
Use a red and green laser though a prism and you will get yellow. you will have to adjust the wattage between the 2 to get that yellow couler.
for me, i would say 18 is where it changed from green/yellow that is mostly green to a yellow/green that is mostly yellow and i would classify it as a yellow if i had to define it based on the colors of the rainbow.
on the 2nd test, 42 is where it flipped from orange/yellow to a yellow/orange.
20 and 42 were where the screen started looking yellow to me. when side-by-side with the other colours, though, they look a lot less yellow than they do on their own. it's interesting how colours can affect how we perceive the other colours around them like that.
16 &42 for me !
I'm in my last years before my bachelor's degree and I never understood why there was no yellow lasers, thanks for sharing this...
turned yellow at 11. I felt green changed. really big change at 13. I used to do car paint matching jobs by mixing colors. one drop makes a huge difference in 1000ml paint.
Where do you get the info about the routes used to output different laser wavelenghts? I cant find on the internet for the more exotic ones. Or can you make a video detailing how each visible laser wavelength is generated?
When they were going across the screen for me it was 18, but when all were shown I was surprised to see 18 still looked really green finding 22 to be the start of the yellow. Light spectrum is wild.
In the table, it's more like 17 to be marked as "first tinge of yellow", 18-19 as "slightly yellowish", and 21-22 as the point where it is DEF yellow
WHOA.. That INFINITER pen was my first laser pointer too!! I'm so proud owning that in 1996 (Primary school!).. brings back a lot of memories :')... Too bad I finally scratched the lens when I tried to clean it with a cotton ball and paperclip (one of the most devastating moment of my life back then). The laser dot was round, I haven't yet found another red laser diode with such perfect shape (all of them was square-ish).
Interesting. On that test in sequence; I felt like around 15 was where I’d say it was turning yellow, but when all of the colour cards were shown together, that looked very green still so just goes to show.
Same with the other, where 40 was my tipping point but clearly not when compared to all of the cards.
For me, in the sequential show it is around 16 or 17 to be called slightly yellowish
The first tinge of yellow is at 15
The 20 and above are DEFINITELY yellow
For me 18 was where I started thinking of it as yellow. And 44 for the other transitions.
The really interesting challenge for me would be when I'd start making the same colors as green or red when starting at yellow.
Fun Facts: Color perception is heavily influenced by language! Yes the language you grew up speaking actually effects the way you perceive the world. There's a famous test for this. There are languages that do not have unique words for the colors green and blue (they instead have a single word meaning bluish-green that expands the entire blue and green spectrum). If you show them 10 bluish-green circle with one being ever so slightly different, they have a hard time finding the different one. But for English speakers its like near instant. However there's an inverse test. I don't know if its the same language but there's a language that has several different unique names for green (there is no just "green" color). You do the same test with 10 green circles with one being slightly different color and they see it instantly. However, because we English don't often use unique names for the various greens, we have an extremely hard time spotting the circle that's ever so slightly different.
Here are a few more examples: If you take the color blue and lighten it, you'll see the new color as light blue (duh right! though you might give it the name sky blue or something like that you wouldn't argue its still light blue). We don't really have a strong name for light blue. Colors like sky blue aren't well defined in our English language. However if you lighten the color red, you don't get light red (I mean there are some hues of red and depending on how much you lighten it you might find a color you'd call light red). But seriously pink is just a light red. However we often call pink as being a separate color, distinct from red. It's not though! Its literally what happens to red paint when you mix in a lot of white paint. (Just like light blue is). Alright what about the inverse of darkening blue? We get dark blue. No real unique name for it. But what do you get when you darken orange? You get brown. Yes! In the exact same way that blue becomes dark blue, orange becomes brown. Even if its not that dark. If you see someone with dark blue jeans, you still say they are a blue color. However if you see someone with brown paints, have you ever saw them as orange?
17 and 42. 17 reminded me of what the wild grass in the high desert starts to look in the summer. And 42 is when I'd start to say it's more like a lemon than an orange.
when looking at all the colours side by side, 20 is the first colour that looks properly yellow but when watching them change in sequence 13 is the first one to show become yellowish and 18 to become yellow
Pro tip: try to film the laser comparison with the different cameras available in the household including different cell phones (front and rear cameras), old phones with 1.3MP cameras, webcams, DVRs, old camcorders, action cams, CCTV, etc. Some of them will pick up 561nm as pure green, some as greenish yellow or even pure yellow. This is because of the different pigments used in CCD/CMOS sensors and different color sensitivity and color balancing methods.
I had no idea lasers had this much of a market for slightly different wavelengths. Pretty cool to think about people collecting light
16 is great. Not when you showed the whole pallet, but in the succession clip, i was on 16🤗
As someone who’s favorite color is yellow, that amber/yellow laser looks pretty good
I would say that 20 and 40 are the first colors I see as yellow sequentially, though when looking at all colors together it's more like 24 and 46. Though looking at the laser points, I might actually call the redder one yellow (the other is lime).
5:05 I started seeing glimpses of yellow at 11, but when I paused and looked away for a moment, then the number 11 looked more yellow green, or grass green.
I would consider 14 to be on the edge. Depending on the surroundings, it could be perceived as both green or yellow.
15 starts to look more yellow than green, even after rest, - if this was grass, then it would definitely be unhealthy, yellow grass.
Since 18 it is slightly-greenish-yellow,
20 is tinted yellow and since 22 it's just yellow.
For me it turned yellow at 25.
I am a little picky about colours like cyans, yellows and magenta's though.
The second laser is decidedly orange(or amber, i suppose).
With the yellow number count, I tried to look away from the screen and do a quick glance each time it went up in number to avoid a kind of retina burn in and I would say 20 and 45 were where I think it would have been acceptable to call it a yellow.
Funny thing is I searched for yellow laser pointers on ebay less than a month ago as purchased my first decent quality pointer this year, a 405nm as violet is my fav colour for a light source. I absolutely love it! I don't care for any other colours as I feel I have lost interest since RGB has been a thing.
Anyway, no yellow lasers came up in my search so I assumed they didn't exist in pointer form factor. Then this video came up and I was like hell yeah! Now they come up on ebay. Talk about timing!
I really like the amber colour as it feels like it's not played out like the common R, G, B colours.
I ended up buying a bunch of random odd colour LEDs when I was in need of a self flashing amber LED for my car dash warning light recently, and the min order was 10 bucks. I got some really weird colours to fill the order, lime green which looks teal to me and my fav is a hot pink LED. Both of those would be awesome as a laser pointer colour.
this channel would be perfect for hdr video, an oled screen would really make the brightness of lasers pop.
Up until 11 I think the yellow is undetectable to my eyes, but after that it becomes obvious with every step.
But 31 is where I start detecting a difference starting from the red, shows how much more sensitive to green our eyes are.
16 was the shade I initially saw as yellow, but perhaps that was due to seeing the evolution from 532 green. When you showed the chart, 20 was more like where a true yellow appears.
$115 sees like a lot for a laser pointer of rather generic build. I can remember these costing just a few dollars in late 90s Hong Kong, albeit of the 532 green variety.
4:43, on the test thing I picked 17 as the mark for Yellow, 11 was where it started to change From Green to Yellow.. (but I'd say around 25 is a true Yellow)
6:38 I picked 39 as the mark for Yellow (but I'd say 45 is True Yellow) it started transitioning from Red to Orange at 30, and hit Orange at 35.
I wonder if the amber one is not just a green and a red laser diode / beam stacked on top of each other…? Might also explain why the green fires first…? Or would the spectrometer have been able to detect two peaks in the green and red wavelengths?
19 and 42 in the initial sequence, but on the all up comparison charts I'd go with 22 and 48. Not sure if that means anything, I'd love to see the sequence in reverse and see what I picked there.
i first noticed yellow at around 12 or 13. by 18 it was definitely more yellow than green. at 19 or so, i would say it gets fully yellow. for me and my monitor!
then I actually said "40" out loud on the second test. 40 or 41. Same as you! what a cool video!
i know it's not a competition but i also guessed both 16 and 40 and that made me very happy
5:04 noting where the screen turns yellow is going to be all over the place because every different device and brightness setting and viewing condition will impact how it is viewed.
However, I have mildly Tritanomalous vision and did not see non-green yellow until 25.
Freaky. 16 and 40 were where I started seeing a lot of yellow, so those were the numbers I picked as they appeared. And that happened to match the lasers. So yay, I have laser vision! Afterward of course, those numbers are definitely not yellow (though they do contain more yellow than green/red). They just show a lot more yellow in the moment when training your eyes on red or green at the start of each test. It makes for a very neat optical illusion however.
I'd be curious to see if you focus both lasers at the same point, could they show that true yellow you've been searching for? And if so, could it be done with a combination of your prior lasers as well?
i squinted my eyes during the "what number does it turn yellow" and got 8, then unsquinted my eyes and it took until 19 for it to register as yellow again. kind of inchresting then 39 but no difference from unsquinting
For me it was like 12-13 where I started to actually notice yellow within the green... but it wasn't what I'd call actual yellow until like 18-19.
My man. The narrative voice... Good lord.
Green->Yellow: 20 is þe earliest frame I'd consider it more yellow þan green.
Red->Yellow: 42 is þe earliest I'd consider more yellow þan orange.
Yellow is my favorite color so I feel my opinions on it are fairly strong.