How infrared imaging camera work
Вставка
- Опубліковано 15 бер 2012
- Infrared light or thermography is the use of an infrared imaging and measurement camera to "see" and "measure" thermal energy emitted from an object. Thermal, or infrared energy, is light that is not visible because its wavelength is too long to be detected by the human eye; it's the part of the electromagnetic spectrum that we perceive as heat. Unlike visible light, in the infrared world, everything with a temperature above absolute zero emits heat. Even very cold objects, like ice cubes, emit infrared.
- Наука та технологія
the first 2 minutes of this are a great setup for an inspirational quote. Here ill wing one: "Sir Fredrick William Churchill discovered infrared by trying to learn what he could not learn with his own eyes, the torch of science is what enlightened him to what was in shadows."
Herschel, not Churchill.
I will look for more inspirational quotes, perhaps a book, by the esteemed author date_vape.
can't wait for this to be put in some year 9 science lesson.
Thank you 🙏🏻
This videos is knowledgeable very well done
Very good!
Good explanation
That didn't explain how the sensors work.
Thanks for using normal units.
You mean SI units
So to get accurate measurements do we have to manually change Emmisitivity settings for different materials? For general purposes its right to assume we want to gauge temperatures of different materials at once --- so how does it work?----> is it just a little off?
amazing video.
is it a documentary ?
so educating
Please explain difference between Thermal imaging & passive Infra red device
Yeah true
3:46
HL3 confirmed.
@faninish I know this is a late ass reply but the energy that a wave holds is not indicative to the energy that that wave transfers. For example: UV has the most energy and that is why this wave that interacts with black paint very effectively. Because it is so high energy the UV rays can bounce off of the black-light dyes, and still bounce back a VERY bright glow in the visible spectrum. This shows that far MORE of the energy from UV is being bounced and reflected, when you compare IR radiation SO MUCH of its energy is directly transfered as heat that it FEELS like more energy.
Temperature is one of the most basic form of energy as well, which explains why infrared (a very basic EM frequency), would transfer all of it's energy as heat.
After that, microwaves are even more basic, and MORE efficient at transferring heat, with an even LOWER frequency. Did you even watch the video?
This literally happens because it is at a higher frequency! It is more sporadic and IR is more straightforward, to put it in lehmans terms.
Basically, while UV holds more energy, it is not NEARLY as efficient as tranffering heat energy, or any energy for that matter. it reflects much more.
There are countless more examples. For instance: the light from the sun is the same no matter what it hits if it hits it at the same distance/ange.... so then, why do black things get hotter then??? Is black somehow more energetic than white because it gets hotter under the sun? no. It is simply reflecting less light, and therefore absorbing more energy than other colors.
So everything above 0 Kelvin emits infrared photons? Really? She are the photons from? Plz help
faninish i agree with you, but doesn't the video say that the suns temperature results in it releasing most of its light energy in the infrared spectrum? the violet and onward side of the spectrum is higher energy, but is not what the suns peak output is, therefor the infrared area in Herschel's experiment is hottest? just speculating
The infared thermometer is the hottest because the materials used to measure heat in the thermometer absorb different wavelengths differently. Say the thermometer was made of mostly glass and a little bit of alcohol, like it said in the video, glass absorbs infared well, but glass doesn't absorb blue light well, even if there was more blue light. The information isn't contradictory, you only need to keep in mind the absorption of the thermometer. To address faninish's point, yes blue and violet light have higher energy, but again they aren't absorbed as well. This experiment of Herschel's was only important because it was the discovery of infared, though it erroneously gave a temperature to specific wavelengths.
No explanation here. They key piece is the thermal radiation sensor, but mentioning it in a sentence doesn't explain anything about how the technology works.
does the ice emit or reflect infrared radiation?
both
So a prism also produce microwaves and ultraviolet, no?
It doesn't PRODUCE it. IR, UV, etc are ALREADY PRESENT in sunlight. The prism just SEPARATES them out
The Fourth Amendment to the U.S. Constitution protects personal privacy, and every citizen's right to be free from unreasonable government intrusion into their persons, homes, businesses, and property whether through police stops of citizens on the street, arrests, or searches of homes and businesses.
Tell me the mechanics not about the Electro Magnetic Radiation Spectrum
Great video information 👍❤ thank you for sharing your knowledge and experience 🇵🇭🫡
SENSORS MATERIALS
the spectrum was flipped in this video, infrared is situated before the red light.
No, infrared is been red and microwave, as they had it shown on the spectrum.
Thermal imaging does need light, just not light that we can see!
did they ever get to how it work?
10min of talking; 30 seconds of only a cursory handling of how they actually work. I rate this vid a solid "meh".
+Justin Bohner Thanks for saving me the time. I thought IR cams & thermal cams were different. His intro says otherwise, so I'm already confused & need to find a better source. Karma should reward you the 10 mins & 16 seconds you saved me, hehe. Use it well!
Annoyed by how there's no mention about the not very well known difference between near infrared (The kind commonly used in night vision cameras) and thermal infrared. Instead you imply there's only one type of night vision.
+Berniebud you can add a video about what you said and it will be really helpful I think.
+Berniebud you can add a video about what you said and it will be really helpful I think.
Actually I have been looking for this only. Please upload a video explaining difference between these two.
Don't tell history. Tell about physical mechanism of it
Knowing a little bit about physics this video is off on alot of things, don't mind it.
Spygas Like what, for instance? I'm curious to know.
I liked it.. had you learned the answers to only the questions you thought about you'd be dumber
I see 8 years later and you have not come up with a clever excuse to reject a good video explanation.
04:35 this is wrong. most of the atmosphere (99% of the dry) does not radiate - absorb or emit - IR radiation. This is a law, and is the key assumption to greenhouse theory.
This is so y2k