Great explanation of where infrared falls on the visible spectrum. Your demonstration o the door shows it's important to remember this is not x-ray vision. In the technical side, I can see customers using this in a hunting application get confused when their rabbit or deer disappears behind thick brush or a large tree trunk.
Thank you Roswell Flight Test Crew. Our company uses the FLIR Tau2 imager except we rotate it continuously in our camera so that we are able to continuously have a 360 degree thermal image panorama for wide area intrusion detection. Thermal Radar is our product. Thank you for the great explanation. I love sharing your findings with my customers to better inform them about thermal imaging.
How does a fire extiguisher with powder work with IR? Can you effectivly jam IR, visible light and thermal cameras with laser light in the right spectrums?
They are friking AWESOME!!!! I absolutely love mine (I also love going on night hikes). I will forwarn you these are definitely not cheap, but for around $2000.00 you can get a pretty darn good one just do your homework and ignore screen resolution (it will be like 1080 screen resolution) but you want the microblometer resolution instead (that's what detects the thermal radiation) your image will only be as good as that resolution. Unfortunately they like to trick you with high screen resolution despite it making no difference as long as it's at or slightly above the microblometer resolution. I/e flir has a 1080p screen but only gets 320 for the microblometer. Moreover check out pulsar there way less money for way better imiging.
Is there a way to detect heat and cold that is in the open air of a room using thermal imaging? I know you can see the heat on solid objects but what could you use to detect a mass of air that is colder or hotter than the surrounding air inside a room? Hope you keep up the cool work! Thanks
Yes, but it's not nearly as visible. When he does the dry ice test and you see the foggy shimmer its actually the cold air being picked up by the thermal. Granted if the temperature is not huge it's very difficult to see, but I have seen farts, car exhaust, dryer vents, ect. It kinda looks like how you see with the naked eye thermal heat waves in the summer.
3:43 i hope you see the message. Don't? it says; wanted todo a live demonstration for you. but everyone else was afraid that i'd burn down the studio in the process...
That's why I didn't go with flir, mine sees the different temp of water in a silver can. Anyway I didn't come here to bash flir, I wanted to mention that you never mentioned my favorite part about thermal imaging... You can see through a tarp or plastic garbage bag almost unadulteratedly, theres a slight shimmer of the bag giving off it's thermal radiation but beyond that you can see through it pretty well, the closer and hotter the object on the other side the clearer the image through it, (this also works with very thin clothing). The downside is if your trying to walk you could easily not notice the plastic sheeting. Also a fun fact you can see hot/cold gasses like your dry ice test where you see the slight whisps of the cool air so you'll know who let it rip if you happen to be watching with the thermal. Last but not least despite not seeing through glass (it can't because as you mentioned it sees the surface temperature) if you were to touch the glass on the side away from the thermal for long enough your handprint would eventually bleed through and could be detected, for those who don't understand it's because of heat transfer that warms up the glas in that spot essentially warming it enough that the other side gets warm enough to detect. Beyond that the points you talked about are spot on just figured I would add some info that I had wondered about for many years (until I dropped the multiple grand it cost to purchase one and find out). If this comment gets idk 20 likes I will post a video showing more fun things utilizing a 720p thermal microblometer (the thermal sensing chip). Oh and one last fun fact, the original thermal imaging systems required liquid nitrogen to operate and were upwards of $80,000.00 that is until the microblometer was invented as the chip itself is in a vacuum allowing it to detect the thermal inferred radiation / aka heat.
Fog does obstruct thermal radiation. It's just that fog blocks visible light better than thermal radiation. The video shows the thermal camera sees though the fog much better than visible light camera. It's possible to detect CO2 with a thermal camera but the effect is much much weaker than the effect from fog. It would have been interesting to see if the thermal camera could have detected CO2. Usually a special filter is used when detecting CO2 since it's much harder to detect.
Fog can affect thermal, if the fog is thick enough it will limit your range and details of the object you are looking through the fog at as much like a blanket it does absorb some of the heat. The dry ice was more so in the fact that it's giving off cold. I am a hunter and I have a thermal.
So metal hides heat signatures? What types of metal? Can a suit be implemented if made of metal sheeting . Or at min, break up the signature? Thanks.. great video sir.
@@N.E.U.R.O thanks man. And I concur. I got a reflective tent and made it into a hoody type shirt with mesh camo over top and you can't see my shape, least on the type I have.
What a great informative video thanks can I use this thermal imaging to see where these squirrels are going in and out of the house, we've done our best to close up everything with metal over the holes would it be feasible to use a Flir, FLIR brand adapter to a cell phone to film this, and then run it real fast and watch for the blazing hot squirrels in the movie, then stop the film and discern where they're getting in?
ntme9 ...it isn’t a lens in the sense you would think of a camera. It is the IR sensor which looks like a lens but is actually “seeing “ minute temperature differences in the IR spectrum.
when I was a kid, I tried to glow a matches with optical lens trough a window glass. But it can't. But when the window was open, it works. I understood something was going wrong, but I was to young to understand existence of infrared light.
Is there a preferred color for tricking thermals into thinking it’s a temperature of a certain kind? ie. certain shades of grey or black/white etc or even transparent and coated materials of that. ie. silver but mixed with a specific color palette for better effect or thermal distribution from sun/body heat? sorry for the rambling question.
Yes and no depends on the inferred spectrum, near inferred (what you are talking about) is so red you almost or if further along can't see it with the naked eye, this is the same technology your TV remote uses (hold your remote up to your camera on your phone for example). Anyway thermal inferred is generally much further along on that spectrum you can see it if it's hot enough (think catalytic heaters for example) but generally it can only be detected via a thermal imaging unit as a regular camera can only see the near inferred spectrum as such near inferred doesn't show up on thermal either.
In most places, the night time temperature is much cooler than a human body so all you have to do is wait. The insane heat our bodies produce will eventually bleed through or the person dies of heat stroke. Either way you win.
You know how in very hot conditions, the heat coming off the ground can make wavy patterns in the air, a type of mirage. Does that kind of effect happen in thermal imaging as well?
Great video, thanks for sharing. I'm trying to find a sensor that can see past thick hair. Might you know if radio waves, thermal, sonic, or something else will do the trick? Thanks very much.
+TEAMERICA The funny thing is, while we were in the studio shooting this video, the director actually made a specific mention of "Mr. Wizard" -- so I think we've definitely tapped into something here... Thanks for watching!
Pulsar is much better than flir, so if you want to buy a thermal unit look at the microblometer resolution as the screen itself can be 1080+ but if the microblometer is 120 you will only get a 120 resolution. As the microblometer is in essence what detects the thermal radiation. If you really want the best in a handheld go with trijicon as they have the highest thermal resolution (you will pay very dearly for it) pulsar comes in second at 720p and flir is half that. Alternatively if your rich you could buy a cooled unit (like the police choppers use) in that case flir is the best but your talking a few hundred thousand dollars at that point.
Lucidity!!! Shame no one let you use your props for the test!!! I was really looking forward to check how they work! lol PS: thanks so much for the video love the demonstrations! Hope to see you at flitefest 2016! Gladly will be able to be there this year! Ed
I am searching for my kitty in and around the I-40 rest area called Gray County Safety rest area in Texas. She was lost there on tge night of Sunday, August 24, 2022, as she ran through the rain in fear. Could I use IRT to check for her in hidden places and through heavy grass and brush? What about in the pipes that go under the freeway? Does it take much training to make good use of this tool?
So those reflective insulating material we see on the inside of jackets, if we turned that inside out, theoretically we wouldn't be able to see the jacket because it's reflective?
I want to know if you can catch CO2 with an IR camera but not, say, NO2, because CO2 is a greenhouse gas (thus can absorb and reemit IR) but NO2 isn't? And what about hot CO2 and NO2? Do they look different at the same temperature because of the greenhouse gas property?
When creep next door, monitoring me in bathroom by using some thermo device, can survivor sheet block that ? If not, please let me know what can I use to block this kind of stalking.
Next time I'm being chased by cops in their helicopter I just hide in a green house and be safe. Thankyou youtube for making it easier for the criminals to get away 👏🏻👏🏻👏🏻
I was wondering if you know if old tv screens, projection TV's, the big Sheetz of plastic that are inside the images are projected on, would that work to evade this?
Frankly a space blanket can easily block thermal, basically anything that stops the thermal radiation from passing. The issue (if your trying to hide) is that the space blanket will look super out of place itself, granted you wouldn't know there's somebody behind it as long as it's not touching you or the heat source, but it would reflect the surroundings acting like a mirror, moreover if you're outside it and it's angled up it would show up as very cold (just like car windshields do) as it would reflect the coldness of space. So if you were hiding and I looked through the thermal at you I would see an extremely dark square, my own reflection, or whatever is in front of the blanket, glass, ect.
It would be nice if you guys did a review on the Sparkfun Lepton Flir break out board diy thermal imager. Low pixels at distance may be cool to compare.
+Hoverbot1TV We've been talking to FLIR for a while about flying a Lepton imager, to see whether or not it would be safe and/or practical to use one for FPV, owing to the extremely low resolution. It's something that we're looking at doing at some point in the future, although they (understandably) want to be cautious about suggesting, even by implication, that a piece of their technology be utilized for a task that it isn't well suited for -- especially something like controlling a drone, where there are legitimate safety concerns. However, it is definitely something that is being discussed. Stay tuned.
Thermal radiation and infrared light are two different things that happen to share a frequency range most of the time. Infrared light will pass through glass, whereas thermal radiation will not (or at least not enough to easily detect). Which is why you can't use a lens to focus a thermal imaging CCD. The CCD must itself be shaped to the desired focal length. Hence the high cost...
Nope.. it's the same. Infrared is a bandwidth from about 800nm to 1000um. Thermal Radiation has a certain wavelength depending on temperature and can be even outside of IR-range (See Wien's Displacement Laws)
No it's not the same. In fact a thermal CCD is colored to block any and all light. Hence the clear glass blocking it. Infrared light of course passes freely through clear glass. And with ambient Earth temperatures being what they are, most of the thermal radiation will be in the infrared wavelenght spectrum (700 to 1000nm). But no, a thermal CCD is not limited to that spectrum. But the programming used to generate an image is looking for differences in thermal radiation from one pixel to another. It's not simply reflecting the state of pixels as a normal CCD does.
Hmm.. not sure what you mean. Please note, I said 800 Nanometer to 1000 Micrometer(!). Yes, there are special CCDs but they're not just colored black or have a special shape, they're made of other materials (e.g. Iridium or Gallium instead of Silicon). Thermal radiation IS the same physical thing as visible light, infrared, UV, gamma, microwave, radio and so on... --> electromagnetic waves, the only difference is the wavelength. But "normal" temparatures on earth are lets say -50 to 150C which is about 7 to 14um. 700-1000nm would be about 2500-4000C, which is quite unusual for most thermal imaging applications.
There would be no difference, as the thermal wouldn't determine different colors so white black ect would look the same, now there's one thing that would change this being exposed to sunlight. Obviously the different colors would absorb different amounts of heat from the sun and in turn would give off different temperatures accordingly. If using white or black hot (my unit only has those options) it would show up with almost all no difference for the white tape and would show up as hotter for the black tape. Moreover different types would react differently as the material would absorb the temperature differently.
Can not understand: If a metal can reflects the thermal emission back inside, and the thermal camera can not see any difference, why then the outer surfaces of the cans are HOT and COLD when touching them? If its surface is hot then it should illuminate like the phisical Black Body. So, there is some gap in my understanding. The tape attached to the cans - illuminates IR, but the hot metall surface does not illuminates IR - why? Incandescent bulb when red-hot illuminates in visible red even yellow color and we see it bare eyes, but why the thermal camers can not see InfraRed when it is warm, not hot??? If we heat up the can to Red-hot it will be red illuminating, isn't it?
Yes there is thermal paint, it's designed to reflect space / cold and is aimed at an upward angle or on roofs. It doesn't have to be angled as such but basically acts as a mirror and will reflect the thermal inferred radiation, for example if you aimed it at trees then looked at it it would reflect the trees.
No, but it likely will show whether there is any internal heat from the vehicle. It will also show heat around the engine, tailpipe, and even the tires due to friction from moving on roadways.
Or if you are garden jumping to get away from the police helicopter that is tracking you by flir, hide in someone's greenhouse and there you have it the great disappearing criminal,ready to rob the next poor sod.
+Jason Parker We didn't cover this fact in this video, but the surface of water -- like a lake or a river -- actually acts like a mirror when you point a thermal imaging camera at it: you can even see reflections of the clouds in the sky overhead, for example. So, yes, H20 is a very effective barrier to thermal imaging. Thanks for watching!
If FLIR infrared can't see through solid objects, then how did a Massachusetts police helicopter use a infrared camera to see through a tarp on a boat to find the Boston Marathon bomber?
If metal is so good at hiding the temperature of what's inside, why aren't tanks and helicopters using this "advanced technology" to hide their thermal signature with some sort of spaced armor? I never thought that a simple tin can acted as a thermal mirror.
You can see the studs in the wall but that's about it, it can only see those as they sit against the outside wall and absorb / disapate heat slower. For example if you set up a tent and someone was inside you probably wouldn't notice them unless they were putting out a lot of heat (enough to heat the walls).
Ron Zorro a German company is making a set of camies just for that. the US army uses blends and coatings in bdus back in the 90s. a cheap way uses a couple layers of space blanket with a inch or 2 of light heat dispersing insulation
But the metal container with hot coffee becomes hot, so it should appear white with termal vision! Metal surface could obscure the IR radiation from hot coffee only if it wouldn't be any contact between liquid and container in the way to keep the metal cold.
well... it doesn't appear on the image even if the metal surface is cold or hot. Most metals have very low emissivity for thermal radiation therefore the reflected ratiation is dominant.
Here's what I will tell you about thermal blacktop will look likewater and the reason why it will look like water is because it sucks up all the infrared light and doesn't let any of it bounced back to the sender this was discovered by heat capacity mapping missions many of which took place in Canada
I miss my original Mark 1 Eyeball...those were the days
Great explanation of where infrared falls on the visible spectrum. Your demonstration o the door shows it's important to remember this is not x-ray vision. In the technical side, I can see customers using this in a hunting application get confused when their rabbit or deer disappears behind thick brush or a large tree trunk.
Man will i remember that about glass
Thank you Roswell Flight Test Crew. Our company uses the FLIR Tau2 imager except we rotate it continuously in our camera so that we are able to continuously have a 360 degree thermal image panorama for wide area intrusion detection. Thermal Radar is our product. Thank you for the great explanation. I love sharing your findings with my customers to better inform them about thermal imaging.
Where did you get the rotating piece for the FLIR, do you think it would work for squirrels were there entering the house?
I loved this video, nowhere else could I find a nicely formated educational video on thermal camera's not enough out there +1 👍
How does a fire extiguisher with powder work with IR?
Can you effectivly jam IR, visible light and thermal cameras with laser light in the right spectrums?
After the Burn Notice episode, I want a thermal binocular.
They are friking AWESOME!!!! I absolutely love mine (I also love going on night hikes). I will forwarn you these are definitely not cheap, but for around $2000.00 you can get a pretty darn good one just do your homework and ignore screen resolution (it will be like 1080 screen resolution) but you want the microblometer resolution instead (that's what detects the thermal radiation) your image will only be as good as that resolution. Unfortunately they like to trick you with high screen resolution despite it making no difference as long as it's at or slightly above the microblometer resolution. I/e flir has a 1080p screen but only gets 320 for the microblometer. Moreover check out pulsar there way less money for way better imiging.
You are nice people and the video is interesting. Subscribed!
What a great video. So much is explained in such a short time. I subscribed.
Is there a way to detect heat and cold that is in the open air of a room using thermal imaging? I know you can see the heat on solid objects but what could you use to detect a mass of air that is colder or hotter than the surrounding air inside a room? Hope you keep up the cool work! Thanks
Yes, but it's not nearly as visible. When he does the dry ice test and you see the foggy shimmer its actually the cold air being picked up by the thermal. Granted if the temperature is not huge it's very difficult to see, but I have seen farts, car exhaust, dryer vents, ect. It kinda looks like how you see with the naked eye thermal heat waves in the summer.
3:43 i hope you see the message.
Don't?
it says;
wanted todo a live demonstration for you.
but everyone else was afraid
that i'd burn down the studio in the process...
That's why I didn't go with flir, mine sees the different temp of water in a silver can. Anyway I didn't come here to bash flir, I wanted to mention that you never mentioned my favorite part about thermal imaging... You can see through a tarp or plastic garbage bag almost unadulteratedly, theres a slight shimmer of the bag giving off it's thermal radiation but beyond that you can see through it pretty well, the closer and hotter the object on the other side the clearer the image through it, (this also works with very thin clothing). The downside is if your trying to walk you could easily not notice the plastic sheeting. Also a fun fact you can see hot/cold gasses like your dry ice test where you see the slight whisps of the cool air so you'll know who let it rip if you happen to be watching with the thermal. Last but not least despite not seeing through glass (it can't because as you mentioned it sees the surface temperature) if you were to touch the glass on the side away from the thermal for long enough your handprint would eventually bleed through and could be detected, for those who don't understand it's because of heat transfer that warms up the glas in that spot essentially warming it enough that the other side gets warm enough to detect. Beyond that the points you talked about are spot on just figured I would add some info that I had wondered about for many years (until I dropped the multiple grand it cost to purchase one and find out).
If this comment gets idk 20 likes I will post a video showing more fun things utilizing a 720p thermal microblometer (the thermal sensing chip).
Oh and one last fun fact, the original thermal imaging systems required liquid nitrogen to operate and were upwards of $80,000.00 that is until the microblometer was invented as the chip itself is in a vacuum allowing it to detect the thermal inferred radiation / aka heat.
Fog does NOT obstruct thermal but Co2 does (dry ice is Co2)
Many hunters use it because of they can see everything in the fog
Fog does obstruct thermal radiation. It's just that fog blocks visible light better than thermal radiation. The video shows the thermal camera sees though the fog much better than visible light camera.
It's possible to detect CO2 with a thermal camera but the effect is much much weaker than the effect from fog.
It would have been interesting to see if the thermal camera could have detected CO2. Usually a special filter is used when detecting CO2 since it's much harder to detect.
Fog can affect thermal, if the fog is thick enough it will limit your range and details of the object you are looking through the fog at as much like a blanket it does absorb some of the heat. The dry ice was more so in the fact that it's giving off cold. I am a hunter and I have a thermal.
So metal hides heat signatures? What types of metal? Can a suit be implemented if made of metal sheeting . Or at min, break up the signature? Thanks.. great video sir.
Mylar space blankets layered under camo fabric seems to work
@@N.E.U.R.O thanks man. And I concur. I got a reflective tent and made it into a hoody type shirt with mesh camo over top and you can't see my shape, least on the type I have.
Do a video on the different thermal cores available 388. 640 1280 etc.
What a great informative video thanks can I use this thermal imaging to see where these squirrels are going in and out of the house, we've done our best to close up everything with metal over the holes would it be feasible to use a Flir, FLIR brand adapter to a cell phone to film this, and then run it real fast and watch for the blazing hot squirrels in the movie, then stop the film and discern where they're getting in?
Make a video with a Flir camera "underwater"! Like in a Coral reef, where one may see Fish swim by or in space, ..
Turn off your screen and then you see a video made with a thermal cam under water.
don´t understand, what you mean by that. Are you being sarcastig?
Yes.. sorry. Water is not transparent to these wavelengths therefore it won't work to record a video under water.
Great video and music!
dude, next video on our thermal camouflage
Thank you, this video was very helpful on my thermal imaging physics project :)
How does it go through the glass lens on the front of the thermal camera?
ntme9 ...it isn’t a lens in the sense you would think of a camera. It is the IR sensor which looks like a lens but is actually “seeing “ minute temperature differences in the IR spectrum.
The lens is not glass, but usually germanium, silicon, zinc selenide or combinations thereof.
Yeah, the F-35 for example uses sapphire on the front of its sensors.
Who else is here from warzone, wondering why he cant see through windows with thermal?
I thought it was a stupid but, till i shot the window, then looked at all the other windows lol.
Proving to people that it’s not a bug😂😂
Legit same
Glass, like fiber glass and also wood/metal etc can block thermal imaging.
when I was a kid, I tried to glow a matches with optical lens trough a window glass. But it can't. But when the window was open, it works. I understood something was going wrong, but I was to young to understand existence of infrared light.
What’s the detection of thermal look like with acrylic, Lenticular Lens or both materials combined?
Does rain stop them imaging, or radio frequency
If “thermal vision” does not allow us to se through walls; what does? Is it only good for night vision and seeing through smoke?
Is there a preferred color for tricking thermals into thinking it’s a temperature of a certain kind? ie. certain shades of grey or black/white etc or even transparent and coated materials of that. ie. silver but mixed with a specific color palette for better effect or thermal distribution from sun/body heat? sorry for the rambling question.
nevermind… this video is 8 years old..
I used this video for my friend who thought they see through glass
They don't need thermal imaging to look through glass, they just need their eye balls.
It really helped me in my project.Can you please make a video on camouflage effect to make things invisible please!
This is not a suit that amateurs make of thermal insulation, this is something new: ua-cam.com/video/cmCJc5ri6hw/v-deo.html
You can use infrared to block camera imaging and facial recognitions in public space where there are CCTV's monitoring the public and in stores too..
Yes and no depends on the inferred spectrum, near inferred (what you are talking about) is so red you almost or if further along can't see it with the naked eye, this is the same technology your TV remote uses (hold your remote up to your camera on your phone for example). Anyway thermal inferred is generally much further along on that spectrum you can see it if it's hot enough (think catalytic heaters for example) but generally it can only be detected via a thermal imaging unit as a regular camera can only see the near inferred spectrum as such near inferred doesn't show up on thermal either.
You should have shown the black nylon trick as well.
How do I detect human in the dark that use anti thermal imaging suit?
In most places, the night time temperature is much cooler than a human body so all you have to do is wait. The insane heat our bodies produce will eventually bleed through or the person dies of heat stroke. Either way you win.
Bullets?
Flashlight?
You know how in very hot conditions, the heat coming off the ground can make wavy patterns in the air, a type of mirage.
Does that kind of effect happen in thermal imaging as well?
Great video, thanks for sharing. I'm trying to find a sensor that can see past thick hair. Might you know if radio waves, thermal, sonic, or something else will do the trick? Thanks very much.
Bigfoot's not going to let you steal a peek that easily........
Are you trying to see cousin itts real face?
Great job guys👍🏻 perfect explanation 👍🏻
+Drone Doctor Thank you, Doctor! We always appreciate your support!
Thankyou! This is great information and I LOVE your humor
Mr. Wizard! You're BACK!!!
I missed you long time.
+TEAMERICA The funny thing is, while we were in the studio shooting this video, the director actually made a specific mention of "Mr. Wizard" -- so I think we've definitely tapped into something here... Thanks for watching!
The thermal camera used in this demonstration is really good, which one is it ?
Pulsar is much better than flir, so if you want to buy a thermal unit look at the microblometer resolution as the screen itself can be 1080+ but if the microblometer is 120 you will only get a 120 resolution. As the microblometer is in essence what detects the thermal radiation. If you really want the best in a handheld go with trijicon as they have the highest thermal resolution (you will pay very dearly for it) pulsar comes in second at 720p and flir is half that.
Alternatively if your rich you could buy a cooled unit (like the police choppers use) in that case flir is the best but your talking a few hundred thousand dollars at that point.
@@IAM_GhosT1 thank you for the detailed informations, much appreciated.
Cool so thermal imaging works. Thanks.
Lucidity!!! Shame no one let you use your props for the test!!! I was really looking forward to check how they work! lol
PS: thanks so much for the video love the demonstrations! Hope to see you at flitefest 2016! Gladly will be able to be there this year!
Ed
+rifted Tell me about it!
I am searching for my kitty in and around the I-40 rest area called Gray County Safety rest area in Texas. She was lost there on tge night of Sunday, August 24, 2022, as she ran through the rain in fear. Could I use IRT to check for her in hidden places and through heavy grass and brush? What about in the pipes that go under the freeway? Does it take much training to make good use of this tool?
How does thermal imaging react to laser projectors?
So those reflective insulating material we see on the inside of jackets, if we turned that inside out, theoretically we wouldn't be able to see the jacket because it's reflective?
That was atually quite interesting :D Thanks for that! :)
+DutchRC Adventures You're welcome! Glad you enjoyed it!
I see sometimes on military vehicle give off this mist that conceals them for evading thermal imaging. What are those thermal emitting mist called?
I want to know if you can catch CO2 with an IR camera but not, say, NO2, because CO2 is a greenhouse gas (thus can absorb and reemit IR) but NO2 isn't?
And what about hot CO2 and NO2? Do they look different at the same temperature because of the greenhouse gas property?
CO2 you can definitely see if you have the correct camera.
*Why was ironbow not talked about?*
When creep next door, monitoring me in bathroom by using some thermo device, can survivor sheet block that ? If not, please let me know what can I use to block this kind of stalking.
Next time I'm being chased by cops in their helicopter I just hide in a green house and be safe. Thankyou youtube for making it easier for the criminals to get away 👏🏻👏🏻👏🏻
They can switch to regular though
@@Izakokomarixyzdoes it help?
@@ccls2315 - they can probably switch between thermal, night vision and normal vision
I was wondering if you know if old tv screens, projection TV's, the big Sheetz of plastic that are inside the images are projected on, would that work to evade this?
Frankly a space blanket can easily block thermal, basically anything that stops the thermal radiation from passing. The issue (if your trying to hide) is that the space blanket will look super out of place itself, granted you wouldn't know there's somebody behind it as long as it's not touching you or the heat source, but it would reflect the surroundings acting like a mirror, moreover if you're outside it and it's angled up it would show up as very cold (just like car windshields do) as it would reflect the coldness of space. So if you were hiding and I looked through the thermal at you I would see an extremely dark square, my own reflection, or whatever is in front of the blanket, glass, ect.
It would be nice if you guys did a review on the Sparkfun Lepton Flir break out board diy thermal imager. Low pixels at distance may be cool to compare.
+Hoverbot1TV We've been talking to FLIR for a while about flying a Lepton imager, to see whether or not it would be safe and/or practical to use one for FPV, owing to the extremely low resolution. It's something that we're looking at doing at some point in the future, although they (understandably) want to be cautious about suggesting, even by implication, that a piece of their technology be utilized for a task that it isn't well suited for -- especially something like controlling a drone, where there are legitimate safety concerns. However, it is definitely something that is being discussed. Stay tuned.
Thermal radiation and infrared light are two different things that happen to share a frequency range most of the time. Infrared light will pass through glass, whereas thermal radiation will not (or at least not enough to easily detect). Which is why you can't use a lens to focus a thermal imaging CCD. The CCD must itself be shaped to the desired focal length. Hence the high cost...
Nope.. it's the same. Infrared is a bandwidth from about 800nm to 1000um. Thermal Radiation has a certain wavelength depending on temperature and can be even outside of IR-range (See Wien's Displacement Laws)
No it's not the same. In fact a thermal CCD is colored to block any and all light. Hence the clear glass blocking it. Infrared light of course passes freely through clear glass. And with ambient Earth temperatures being what they are, most of the thermal radiation will be in the infrared wavelenght spectrum (700 to 1000nm). But no, a thermal CCD is not limited to that spectrum. But the programming used to generate an image is looking for differences in thermal radiation from one pixel to another. It's not simply reflecting the state of pixels as a normal CCD does.
Hmm.. not sure what you mean. Please note, I said 800 Nanometer to 1000 Micrometer(!). Yes, there are special CCDs but they're not just colored black or have a special shape, they're made of other materials (e.g. Iridium or Gallium instead of Silicon). Thermal radiation IS the same physical thing as visible light, infrared, UV, gamma, microwave, radio and so on... --> electromagnetic waves, the only difference is the wavelength. But "normal" temparatures on earth are lets say -50 to 150C which is about 7 to 14um. 700-1000nm would be about 2500-4000C, which is quite unusual for most thermal imaging applications.
Great video information 👍❤ thank you for sharing your knowledge and experience 🇵🇭🫡
KU band and other forms of back scatter can see through most everything, mix with multi spectral you can render an image like that seen in the movies.
+The Tinfoil Tricorn Wow! Can you post a link? I'd love to see it in action and understand how it works!
***** that should help point you in the right direction
Do we emit a profile in the UV spectrum and if so do thesame principals apply? Do they make UV cameras?
UV is high energetic radiation and corresponds to very high temperatures therefore human body does not emit UV by itself. (See Wien's Equation)
what significant factor effect to thermal image
Does Silicone block IR light?
Amazing! What would happen if you put also white electric tape in the hot and cold can experiment???
It would still show that one was hot and one was room temperature, depending on what pallet setting do you have your thermal imaging device set to.
There would be no difference, as the thermal wouldn't determine different colors so white black ect would look the same, now there's one thing that would change this being exposed to sunlight. Obviously the different colors would absorb different amounts of heat from the sun and in turn would give off different temperatures accordingly. If using white or black hot (my unit only has those options) it would show up with almost all no difference for the white tape and would show up as hotter for the black tape. Moreover different types would react differently as the material would absorb the temperature differently.
Does a space blanket block thermal?
Thank you very much it's been very informative thank you
Thank you! great and funny explanation ❤😂
what about covered glass or plexi glass?
Can FLIR infrared see through roofs of houses from above?
They can not. They can see where your heat is escaping from the house.
Can not understand: If a metal can reflects the thermal emission back inside, and the thermal camera can not see any difference, why then the outer surfaces of the cans are HOT and COLD when touching them?
If its surface is hot then it should illuminate like the phisical Black Body. So, there is some gap in my understanding.
The tape attached to the cans - illuminates IR, but the hot metall surface does not illuminates IR - why?
Incandescent bulb when red-hot illuminates in visible red even yellow color and we see it bare eyes, but why the thermal camers can not see InfraRed when it is warm, not hot???
If we heat up the can to Red-hot it will be red illuminating, isn't it?
If glass blocks thermal, why do lenses work on those thermal hunting scopes?
They're made of germanium, not glass.
@@perdedor3571 Yeah, I soon realized that after I made this statement when I looked up thermal camera lenses.
why does the brown color of dark soda become transparent in FLIR?
what about plexi-glass? I wanna use it with a heater. And how can green houses work properly when the glass doesnt allow both UV and IR through?
Is there any lotion or some kind to put in the skin to block ir?
My flir one can see through opaque polyethylene bags and it is awesome
So a solid sheet of glass will block thermal imaging. What about fiberglass (the fluffy kind)?
do we have a thermal paint that enhances capability of my thermal camera as I place my object (painted) far away from it ?
Yes there is thermal paint, it's designed to reflect space / cold and is aimed at an upward angle or on roofs. It doesn't have to be angled as such but basically acts as a mirror and will reflect the thermal inferred radiation, for example if you aimed it at trees then looked at it it would reflect the trees.
How can you eliminate glare?
Try it with steam and why did you not do the experiment with the more accurate setting. The colored one
What will happen if we write a information down in a piece of paper can we see the information in the thermal image??
I’m trying to understand the difference between infrared and thermal sights in BF4...
what material is the lens on the camera made of, if regular glass can block infrared waves?
Germanium
Thanks, now I know why they use glass to insulate things.
Can FLIR infrared see through car rooftops (metal) from above?
No, but it likely will show whether there is any internal heat from the vehicle. It will also show heat around the engine, tailpipe, and even the tires due to friction from moving on roadways.
So to hide we need to make a double glazed box we can walk in.............lol
Or if you are garden jumping to get away from the police helicopter that is tracking you by flir, hide in someone's greenhouse and there you have it the great disappearing criminal,ready to rob the next poor sod.
H20 barrier, nice video.
+Jason Parker We didn't cover this fact in this video, but the surface of water -- like a lake or a river -- actually acts like a mirror when you point a thermal imaging camera at it: you can even see reflections of the clouds in the sky overhead, for example. So, yes, H20 is a very effective barrier to thermal imaging. Thanks for watching!
Can you see fish in the water with thermal cameras? I wonder if I should invest in a thermal camera for my fishing activities.
No, the water will show up usually colder but also act as a reflective surface, you will get a dark reflection as it will reflect space / cold.
Can y'all suggest a decent budget infered monocular? Thank you
If FLIR infrared can't see through solid objects, then how did a Massachusetts police helicopter use a infrared camera to see through a tarp on a boat to find the Boston Marathon bomber?
Is there anyway to see in a snow storm.. through a white out
If metal is so good at hiding the temperature of what's inside, why aren't tanks and helicopters using this "advanced technology" to hide their thermal signature with some sort of spaced armor?
I never thought that a simple tin can acted as a thermal mirror.
Terahertz camera's could see thought thin walls and some materials.
Can you use thermal to see threw a trailer house wall to detect heat activity?
You can see the studs in the wall but that's about it, it can only see those as they sit against the outside wall and absorb / disapate heat slower. For example if you set up a tent and someone was inside you probably wouldn't notice them unless they were putting out a lot of heat (enough to heat the walls).
Use for during operation vernacular night vision scope X RAY building or forest.
If I'm ever getting persecuted I'll remember to carry my glass
Great video!!
+Bob Stubs Thanks!
How to prevent infrared heating?
in this episode, we're gonna show you how you can use thermal imaging to get -some- a head
What kind of material could I use to build a anti-thermal imaging clothing??
Ron Zorro a German company is making a set of camies just for that. the US army uses blends and coatings in bdus back in the 90s. a cheap way uses a couple layers of space blanket with a inch or 2 of light heat dispersing insulation
But the metal container with hot coffee becomes hot, so it should appear white with termal vision!
Metal surface could obscure the IR radiation from hot coffee only if it wouldn't be any contact between liquid and container in the way to keep the metal cold.
well... it doesn't appear on the image even if the metal surface is cold or hot. Most metals have very low emissivity for thermal radiation therefore the reflected ratiation is dominant.
That's very interesting......Thank you!!
Are you a physicist or engineer?
Engineer and hobby-physicist ;)
Ada Lovelace Ada, what do you think about mylar and thermal imaging? Would mylar block your image?
You can search for "Mylar transmission" and you should find plots of the transmission spectrum.
I notice that pilot videos with UAPs go dark around the object once they switch to thermal. Does this mean it's really cold?
Why does glass make you invisible? Could you do the same with a piece of cloth impregnated with glass dust?
Can an IR filter see through playing cards to give an image of what the cards value is?
Mark McKay not at all
How about mylar blankets?
I'm wondering if the IR camera lenses are still made of glass!!!
They never were. Germanium, silicon, zinc selenide, etc, are typical materials.
What about fiber glass?
Here's what I will tell you about thermal blacktop will look likewater and the reason why it will look like water is because it sucks up all the infrared light and doesn't let any of it bounced back to the sender this was discovered by heat capacity mapping missions many of which took place in Canada