How 3D holograms work
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- Опубліковано 14 вер 2015
- Holograms are photographic recordings of 3D scenes. Unlike a camera, which captures one view through a small viewer focused by a lens, holograms capture an entire light field which allows them to recreate the 3D scene. Shimmery 2D projections, like pre-recorded Pepper’s ghost illusion, are often confused with 3D holograms.
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Conclusion: It's kinda hard to explain.
Also to understand
And understand... As are most topics involving Quantum Mechanics, QFT, QCD, Theoretical Physics, etc...The reason being that they are counterintuitive. They fly in the face of everything most of us were taught from elementary thru Highschool & in some cases college...
"Hey, mind coming over and stomp around my yard a bit while I film it?"
+3ATIVE I blame the lack of fresh coffee in my internal containers.
@@antrygrevok6440 for real
Hello Physics Girl, we in the holography community are so happy you made this video! There are so many false claims nowadays about what a hologram is. It´s just perfect to see somebody actually knows what it´s about!
It is a very good introduction to the topic, though of course, a much longer video would be required to fully explain how the diffraction properties of waves ends up producing a 3D image that rotates in the correct way when we change angle we look at it from.
+Eugene Khutoryansky That is true. There is only so much you can do with a 4 minute video!
+Physics Girl Maybe a series of 4min videos? :D
God. Love you both guys . Physcis Girl and Eugene .Thx and keep making videos
+Eugene Khutoryansky It's a work for the Eugenius of physics and animation.
+Physics Girl I'd like to see a series of 4min videos as well. Or maybe a 8min video (or a few 8min videos), depending on what's best to really explain this!
I find the concept of a holographic film retaining the full image when cut very interesting.
I still don't get how they work.
Which by my estimates should put out two wavelengths that are fluctuating in and out of each other bouncing in and out of each other which is the infinity machine.
( THE LIGHT ACCELERATOR )
And the batteries slash generators are made of super conducting crystal diamond infused with gold and superconducting material formed in superconducting material and electricity so would you grow it it's charging itself
And those are also going on my laser or whatever you want to call it
See the ion engine works like this the at the Planck scale with everything Flows at its base waves okay now this machine I'm building build these waves from the bass waves just like
It records the phase of the wave, So you playback a recording of a coherent standing wave giving it depth that a photograph wouldnt have... Better?
@@stevewilson4321
Yes u r right
Great explanation, the backyard-bullet time was cool too.
I'm really amazed by holograms.. when you look at them up close, it's like there's a little 3D world in there.
So cool !
I found your channel yesterday morning and watched a whole bunch, really enjoying it with this mornings coffee :3 Your vibe is solid and the information is thorough. Please make as many more as you can ;p this is as good as smarter everyday ;p for full really like over 8000.
As a kid in the 80's I always wondered how the holograms for stickers like Lisa Frank and on toy lines like the Visionaries & Supernaturals were created, they appeared to be sculptures photographed in 3D. Thank you for a brief look into the creation of those images and if you don't know about the figures I am referring to, check them out, esp. the Visionaries line, some amazingly articulated 1980's nostalgia right there !!!
Because so many people think they are holograms, I always refer to peppers ghost as "holograms" with full air quotes. Most of my high school friends hate physics and don't want another long winded explanation from me.
But I LOVE holograms and optics. I want to minor in physics and I think I could do a lot of research there.
Go for it
Thanks! You managed to create a really understandable explanaiton of how a hologram works without sacrificing accuracy! Much love.
Just found your channel and I'm loving it - where have you been my whole UA-cam life, Physics Girl? :-)
I find the way you express your curiosity of the world veery attractive, great work!
Finally, someone able to patiently explain holograms to a non-scientist like me! Thank you!
This was a great explanation ! Certainly cleared up the concept in my head. :D
Wow! Right over my head!
same
Loved the way of explanation. All doubts cleared 🙌🏻🙌🏻
I really enjoy your explanations of things keep them coming :)
Could you please post the email you must have sent to your friends asking them to come over and walk randomly around the backyard?
+MindLaboratory hahaha It went something along the lines of "I’m filming a video that I need to get a shot of a “crowd" for. You don’t have to do much except walk around and freeze. I’ll supply the cookies, drinks, food, whatever your heart desires!" I'm amazed they showed up. :)
+Physics Girl They simply couldnt stop laughing ! :D
+Physics Girl Free food? Sign me up for your next yard-stomping party. :D
+Physics Girl Free food and drinks works every time.
First i's a nice prisetation thanks.
To understand how we can see the entire image/picture in bouth in the entire hologram as-well as in eahc fragment of the hologram we must undrestant that a hologram is not a picture but an Optical phenominan/media and in this case work's like a window. Lets say if we cover at entire window whit a black sheet of paper with a hole in somewhere and if we take a look through this hole no matter where it is plased, we'll find that we'll see the whole room/landscape/image only our veawing angle is slithly deferint depending where the hole is plased in the paper, again as we remove the entire paper we'll naturaly still see the entire room/landscape/image.
Erros:
Erro in this prisentation: be aveair its chrutioul that both the reference and objeckt beam is coherent to make a inteferince pattern/hologram.
Coretion: The deference is not about coherentce but the vawe-front/vawe-pattern. the referance wave pattern is regular where the opject pattern is destorted/formed by the shape of the opject theo still coherent whit the reference beam/pattern when they mede and form the inteference pattern on the film and are recorted.
Thats why we carefuly messoure the lenghts of all our optical rails/trains when recort a hologram.
Spelling Erros: Pardon my many lag of propper english spelling skills :-)
The best video I found to explain hollograms quicly but not too superficial
this chanel is one of the best physics channels on UA-cam, watch out Derek , there's a new channel in town!
Reminds me of the pictures we'd draw in school by folding a paper in zigzag so when the paper is open the image would change depending on where you looked at it from.
This was explained very nicely! Thank you
Thanks for this video - in addition to a great source of info on holograms, you've answered a question that's been bugging me for some time, namely, why certain sci-fi machines are said to be holographic if you can cut a piece off the machine and have that piece function just like a tiny copy of the whole machine. This always puzzled me, but now I know, so thanks.
Thank you for explaining!
Love this! The more I see it; the more I love it.
This is very informative and interesting! Love ur easy to understand and for a laymen person like myself this explains it in a way that ppl can easily understand! 👏👏
Thanks to you I finally understood (really) how hologram works.
I was so confused about them when I was a kid.
I just had this "Eureka" flash !
Very instructional! Brilliant!
You people are on my level you think the way I do and you have passion you all do
Excellent as always! A good friend's father did some research with Hologram's at U Iowa.
Instruction for understanding the science of things by someone who knows how to relate to those who are not already saturated with scientific information ...it's continually interesting, amazing and wonderful.
Lucidly explained, thank you very much.
Finally a good explanation. Thank you.
very good as always, I'm french and I like watching your videos !
Thank you, Physics girl! this is my first lesson in Holography!
Great explanation! I’ve always wondered about how holograms are made.
I just found this video and am really impressed with the quality that this was in 2015.
So....good. First time I understand about Hologram so clearly. Thanks to physics girl.
Great explanation!
Amazing explanation! pretty cool
Thanks helped me a lot!
One of your best!
Okay, I think I'll have to watch that again :'D but I was also very distracted by the images. I still can't believe that this is possible! It seems so futuristic ^^
I am honestly saying...its one of my favorite physics channel
BRILLIANT! Thank you.
Those are your friends walking around in your yard for the light, aren't they?... I love that! It's so much more personal than you expect from a physics demo.
great video. Though I didn't learned much about hologram, I am much excited about it.
Thank you very much. This is great video.
Very cool - I'd still like to know where front-lit holograms get their coherent laser backlight.
I love your content!! Go you!
Thank you so much for stating the fact that for holograms like this; for each division of the whole, that the whole is contained within each division.
This fact is one of the rarest things demonstrable, about some very special things, such as a single member of a species still has all the information about that species.
Or a single instance of an electron, still has all the properties of all electrons.
Possibly there is such a relationship with many other intangible relationships that may or do exist all through the universe....and teaching about things like this really does inspire one to wonder about all the other types which exist in this, or similar beautiful ways.
Thank you much! Thank you for sharing this, with us!
Brilliant idea
that was really informative!
Very Inspiring video to watch for my graduate level photonics class!
I love your videos :D
Great job man
great job !
Pretty clever, and makes sense now. Thanks
thank you very much .. you've got a new subscriber ..but we also need more details about this particular topic please.
Cool stuff!!
Amazing !!
You are a beauty with brains. love you and your videos. :)
very Usefull video and presentation was so good
I was told they also have holograms that change image based on how close or far away the viewer is from the film. How do those work, and what are they called?
So does a finished hologram require a laser for the 3D image to be visible? Or can you see it in normal light?
I still don't get it.
how exactly does it work that you can see the entire image in a small fragment of the entire picture AND the entire picture on the entire picture?
+isethoriginal The small fragment would show you the whole scene but it would be very blurry. The whole holographic film shows the same scene but much more clearly.
Because the interference pattern on the holographic film spreads out the information on it with no correspondence to space. In other terms, if you take a single ray of light, its "presence" will alter the whole interference pattern, therefore each single piece of holographic film holds information about all the light rays reflected by the object.
thank you so much
Weak. hand-drawn teaching elements with an abundant scarcity in technical detail. Great for 3rd graders.
So much for physics, girl.
All the same, cheers for the effort.
Drove me crazy not to know how the one in my passport works. Thanks for the explanation!
How cool that you can cut a holographic film apart and still see the whole object. Like what a cool idea for a family gathering- take a big hologram, show it off, and cut it into as many pieces as there are people in front of everyone. You'd have to pass them out and tell everyone to look closely before they'd get it.
Great video :)
awesome stuff :D
First... Let me tell you that you ARE FREAKING AWESOME, and this EASILY can become one of Favorite Channels💪⭐.
With that out of the way, do you have a video that explains the quantum field and quantum physics...
Thank you!!💜😊
Unfortunately this makes no sense to someone who doesn't have a solid understanding of light physics lol
Grapefruit7
It does make sense. I’m a high school student, and I understood everything
@@bobnavonvictorsteyn9017 thats usually covered in high school physics, so yeah that makes sense haha
Grapefruit7 not really more like all schools cover this and I’m in middle school
@@nextdoorparty602 Same...
I'm a physics major and, though I get the science behind it, still find it hard to comprehend the technicalities of making a hologram
Would you be able to use multiple wavelengths of lasers to combine into a multicolored image?
I thought I heard that's not possible yet
+James Craver I think the interference pattern would be messed up if you use multiple wavelengths
+Amit H use different surfaces for each color and then combine the output digitally. you can display it on a regular 3D screen with motion tracking. it's a bit of a cheat, but possible nevertheless.
maybe you could somehow use a layered surface to do it without cheating, but it would be hard to do it for non-static scenes.
+James Craver Yes you can! You can also do this at home with Holograms kits (around 200$). 3 different lasers of 3 different color are used, in a 3 steps exposure on the same film.
+Plaît Liste Exact. Search for "Litiholo Kit".
Thank you so much ma'am ☺️
I was slowly getting lost until "C-A=B". I'm sure somebody'll say it's an oversimplification, but I think that's exactly what I needed. Keep up the great work! (I really hope these more frequent videos become a regular schedule.)
The object beam is essentially a 2d grid of the object, similar to the 1d line around a music record.
Very good
Very nice
Once went to a hologram museum in Indiana (don't think it'a there anymore), and they had a hologram of Ronald Reagan. Those things are awesome but creepy looking. They're not just 3 dimensional. You can see all kinds of detail that just isn't there on a regular photograph: moisture on the eyes, light glinting off the hair on the skin. Of course there's no way to show this in a video, but it's pretty striking when you see them in person.
Nothing more than a movie projected onto a screen from different angles. No big deal.
How (and why) would anyone ever (in their right minds) dislike this video!!
Thank you! That was really cool getting the crowd to move as waves! You are an amazing teacher
good job
Mind blown.
good to see her friends helping her out. i wish i had friends.
Thank you! :)
Thank you very much. It is very clear, informative and informative. I'm inuring about the holographic film, what is it composed of? any brand name ? how can I get it? Is ther any specific film for each wavelength or is there any film can work for all wavelength ranges?
Thank you again
Would it be possible to project multiple holograms onto the same film using lasers of different wavelengths? If so you could probably use red green and blue to get a full color hologram.
+Wyatt Jackson
Yes you can! You can also do this at home with Holograms kits (around 200$, search for "Litiholo Kit".). 3 different lasers of 3 different color are used, in a 3 steps exposure on the same film.
Holograms are very confusing, but thanks to this video I understand it much better.
So cool.
What happens to the image if you change the frequency of the laser ever so slightly? (When viewing the hologram later, that is.)
There's also Dr Nozman (French channel) who teach how to make a hologramm with just a CD box and a phone ! ;)
It ain't the same. It's not a picture and you have to keep to phone on.
Imagine making a holographic image to be used on a billboard.
What if you took one of those old cameras that records separate film channels for each color, stuck some holographic film in there, and illuminated the subject with three lasers? The projector would be the camera in reverse. Then you have a full color hologram.
If you had a filter that only let through one wavelength of light, could that work to take a hologram in broad daylight, as long as you know the wavelength for the filter? Or better, put the filter behind the holographic film so you can hold it in your hand!