Who Invented Night Vision, and How Does it Work?
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- čas přidán 1. 07. 2024
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Buy your DNA kit here: bit.ly/TIFO2. Use Coupon code “ TIFO” for free shipping. Thanks to MyHeritage for sponsoring the video.
any guarantee our dna would be sold to black water
Wicked , cheers ❤. Ref# the vod. 👍
They couldn't get Simon to do the MyHeritage ad because we'd find out that he's more than us mere mortals.
Maybe Devon is getting the sponsor money and Simon is getting the CZcams ad money?
Simon gets all his money from the deep state and illuminati
Simon has done My Heritage in the past. I do think TIFO is more Daven’s baby post split.
It's because we would find out that a good portion of his DNA is literally made up of cocaine.
In any case, sponsored ad segments are usually recorded independently of the main video and inserted during editing, even on channels where all three tasks are performed by the same person.
The way night vision works is by turning photons into electrons by focusing them with the objective lense and making them hit a photocathode, and then those electrons are multiplied tens of thousands of times by a microchannel plate, and then those electrons are turned back into photons when they hit a phosphor screen that will glow whatever color the screen is designed for. Green phosphor was used for a long time because humans eyes are most sensitive to green light but recently white phosphor has been used because we are able to have better contrast with black and white (even though white phosphor is sort of blueish). You could actually make the phosphor screen any color you want but some colors are more useful than others.
22 minutes of our lives saved we thank you
Listen to Simon explain it is still far more interesting, sorry bud.
@@meh7348 fair fair he's fun to listen to but you know sometimes you just want the answer though that's more a rant about CZcamsrs in general 😅 I feel kinda guilty now
I have green and white and I love my white phos unit but my green sees into much darker conditions
Thank you
Hershel didn't just randomly decide to place an extra thermometer at the end of the split prism, or have some sort of genius 6th sense to do so. The additional thermometer was meant to be a control for the experiment to compare the difference in heat gained in each color with the ambient temperature of the room. Great example of a perfectly disciplined experiment gone wrong leading to an unexpected and fascinating discovery. Bingo bongo, eureka we have science.
As has been said before, the most exciting phrase in science is not "Eureka!" but rather "Hmmm, that's weird...."
Awesome video but the find your linage package is going to make your DNA info available to whoever wherever for whatever. Don't ever.
Simon told us never to use QR Codes so I'm not signing up. I believe fact boy.😂
And Dave says that MyHeritage will never sell your info.
23&me and several other DNA companies INITIALLY said that too. 😂
But when they were offered a huge chunk of change for it, they all immediately changed their policy and sold everybody's info.
Waiting for the inevitable "who's this new guy?" comments from people not paying attention to the fact that Dave explains how long he's been here in the ad read, let alone all the videos he's been in already. 😅😂 Thanks for all of the education over the years Dave and Simon! Haven't skipped a video yet! I've learned more from you guys than I think I did in all my years of schooling.
Thanks for sticking with us all this time. :-) -Daven
@TodayIFoundOut is that a typo or have I been mis-hearing Dave for the last few years?????
His name is definitely Daven. Easy mistake @@wesleymorris6862
He's Daven, I can confirm
I'm not saying new, again I say more
Gen 3 night vision is one of the coolest things I own besides my telescopes... Got a 2008 autogated pvs 7 (device seen at 19:42) a few months ago and its taken stargazing to the next level along with other nighttime activities. The nighttime sky in rural locations is just straight up addicting. I've even driven on the highway with my pvs7 when its rainy at night because this literally helps with visibility even w headlights still on. I feel i have definitely gotten $1500 of fun out of this already and this thing should last for years to come!
About ten years of you take care of it and store it properly. Usage is also a factor but I can't imagine you "burning it out".
@@Shoelessjoe78yep its in good hands, run lithium batteries to avoid leaks etc put cap on when not used. its also nice to have a modern gated tube for more peace of mind during usage. I also suspect my image intensifier tube was barely used because of a couple things along with its manufacture date and being a pvs 7 intensifier tube. lol probably sat in some national guard armory til they got issued pvs 14's . hopefully this lasts more than 10 years but 10 would be nice
Gotta upgrade to a white phosphor pvs14 or dual tubes one of these days. The difference between a old school pvs7 and a modern pvs14 is unreal. Much higher resolution, less noise, more contrast, and a brighter image. Plus the cool thing about a pvs14 is you can attach it to a telescope and see the universe is a whole new way
@@bghiggy yea the new 14’s are nice my buddies got a wp 14 that’s what got me into this , def clearer in the super dark areas but my 7 definitely isn’t a generation behind even side by side. You actually can attach a 7 to a telescope I have an Adapter where I take off the objective lens and can put it into the focuser without a telescope eyepiece for viewing. The eyepiece + 14 is better for showing faint stuff in a telescope
I love my pvs7's so much
The irony that "Night Vision" was basically created by a guy trying to create filters so he could look at the Sun is not lost on me... lol
Same! Just like firearm silencers were made by the son of the man who invented machine guns and subsequently went deaf. 🤣
@@paulis7319dude 😂
I learned more about the Starlight scope in this episode than the military would tell me back in the day 😂😂😂
Depending on what years you were in, it might've just been because it was Classified AF.
"Here's what the knobs do. Go hunt the enemy with it. The rest is need-to-know only"
Because the military doesn't know how or why anything works the way it does lol They just mindlessly use stuff.You don't need to know why a gun works to use one,and same goes for pretty much everything else.
I am an old submariner and I will tell you wikipedia had specs back in the day even our cooks with a Secret clearance were not supposed to know.
Combat assets are always made somewhat ambiguous during their infancy.
I am looking forward Simon telling us all about quantum physics and the wave function
Before I see the answer, my guess is this: human vision is most sensitive to green wavelengths, so it's easier to shift to that and get the most contrast.
All the cool kids use white phos now, though.
In my opinion amber works better.
So in the RGB LED lighting world, green LEDs always look more intense than the red & blue. You're saying it's our eyes' sensitivity curve that's to blame, not the LEDs' output?
@@robwoodring9437 probably both, but you can check the spec sheet of the LEDs
@@Stratonetic the microscope I work on is fitted with an amber display, and I love it for working in the dark.
I went to high-school with the writer of this episode. He was brilliant back then, now he is dashing & brilliant.
FLIR is also used by firefighters to locate hot spots inside of hollow walls (standard wood constructed homes), for example. Some can also give an indication of how hot a hidden fire might be.
Law enforcement and Search and Rescue also use these to find people and even pets.
As a Pittsburgher, I think its kinda cool that Samuel Langley and Vladimir Zworykin both had worked in Pittsburgh, PA!
I got so excited when you mentioned the Peltier device! My capstone design project for my mechanical engineering degree was a temperature regulating prosthetic socket that used those peltier modules. Basically they’re little white squares that when a voltage is applied, causes one side to get hot and one side to get really cold!
You room is resonating at 500hz; editor take note please!!
I’ve also noticed on the casual criminalists channel that Simon accidentally “used the wrong mic” for a segment of a video
I question why there are different setups, all giving different results.
Sometimes the compression is too high, resulting in what some commenters will describe as too much treble, or echoey (short room reflections)
I urge you try to stick to one setup and dial it in perfectly for consistency across every channel and every video
Happy to help if you wanna message me or something
I remember watching the news from January 1991 onwards and enjoying the night vision video collages.
I calibrated Helicopter NVGs (2 lenses vs 4) when I was in the Navy. Only front and rear lenses, plastic housing, and intensifiers (like a C battery in size and shape). Just had to focus and run intensifiers test on the test set, then nitrogen backfill. Probably did 2'000 over time. Yes, we played with them in the cable braiding room, lights off diy obstacle course.
Dave is 2% Asian? Either one of his ancestors was hitchhiking the silk road, or he's a decendant of Ghengis Kahn.
Aren't we all? :-) -Daven
@@TodayIFoundOut Alternatively, more likely and less excitingly, low percentages are just "noise" in the results.
Pleasantly surprised that Rochester NY (my hometown and home of my alma mater) played such a large role in the development of Night Vision Technology. 😊
There likely won't be any gen4 night vision as fusion technology (nv and thermal combined) will be more ubiquitous as it can give you far more information than image intensification alone
the german panther tank commander in the second war have night see tools, they call this kasskaden geraete .
All I know is back in 86 the company had one that the platoons would share. Gunny, says us marines get this one, and most likely the army hands them out to every private after graduating boot camp! 😂😂😂
16:52 _and they began reaching U.S. troops in Vietnam in 1967_
I was in Vietnam in 1966. My unit received an AN/PVS-2 Starlight Scope in mid to late autumn of 1966.
I had the chance to briefly work on a night vision project. Nothing interesting came of it, but getting to play with the NIR and "starlight" scopes was a blast.
I worked for K&M Electronics that supplied the high voltage power supplies that powered the ANVIS and PVS-7 multiplier tubes We shipped thousands of them during Gulf Storm 1 in 1991. The only problem is photomultiplier technology can't see through fog or dust making infrared much more desirable. The company shut down in 2005.. PMT's also generate a flat 2 dimensional image totally lacking in depth perception. When you hear about helicopters crashing into each other at night in training exercises it is usually because the pilots lacked experience with this imaging system.
The NVG's used by the Australian Army in the 90's were passive, but they featured an active mode for use in total darkness.
No I will not donate my dna to someone who doesn't have strict policies and security about how they preserve and use the information.
IR night vision is now downright cheap. I bought a monocular for $100. Thermal is still quite spendy.
ordinary CCD record down to 1200nm. Just remove the IR filter and shield it from visible light.
I think Simon must be a AI computer😂, each video is uploaded 1 day ago, 1 week ago…He must be trapped in the studio! Love the videos on all your channels ❤
I got to play with color night vision in a lab in SoCal in 2010.
The problem they had was making it smaller (at the time).
MyHeritage - I sent in a sample from a friend for me. I am a 40 year old black woman now. 😂
I’m surprised the video never got into how the transition from green to white phosphor came about. Also, there was no information on going from two tubes to the GPNVG for more peripheral vision
Centuries of science, decades of of and years of combat testing have culminated in my ability to go get burritos at 2 AM from Taco Bell with my headlight off and a silly hat. God bless America.
My DNA.
The absolute best way to make sure you're full genetic profile is available to anyone, at ant time.
Our Own Devices has a really good video about night vision
He wrote this one too. :-) -Daven
A channel called Riloe just did a great video about how NV and particularly the quad tube set became dare I say iconic
🇺🇸
Daven bro...nice to seeya. Edited to correct name spelling! Looking good bro.
you didnt talk about the red night vision that was driving soldiers mad in nam
The HUD that I have in the 767 that I fly SUCIKS! Most people like it for landings, but I haven't figured it out yet. It is all green lines....
Huh. Found our own devices separate, didn't know it was one of Simon's many writers.
Just imagine the stacking those boys could have done with the latest gen night vision we have now.
Huh. I was assuming that the modern version would consist of a sensor (similar to the one in an infrared digital camera), some electronics, and an LCD panel.
Those do exist, however they are currently significantly inferior to analog night vision. The good ones are about on par with gen 1 and they lag making them ill suited for moving with them.
I thought the Pather tank was fitted with night vision stuff? Was that the old bunkier stuff then?
that thing was ginormous.
Night vision triangular ufos.
Just bokeh effect.
10:00 hey! I live there!
That Desert Storm propaganda on the news everynight was something.
9:59 hell yeah! Let’s go Rochester
I want to do my DNA, but i am scared of who i could be related to. I would never be able to resist trying to find out. Best i not check.
Nice video but I have one burning question.
Why is the image always green? Blue might be a choice if there is an option.
Green light is most intense noticed by the human eye, while blue light is not perceived as light by the human eye which makes adapt to darkness way quicker.
Driving with NVGs sucks, your depth perception is shot and it becomes hard to judge distance. At least from the NVGs we used when I was in the Army.
Fact.
There's also blue, and white for NV's not just green
As an FYI for Simon, Okinawa is pronounced Oh kee nahwah, not with an Ah sound at the beginning.b
This video is wrong about the wavelengths emitted by humans. It would be closer to 10 microns for the peak wavelength (rough guess). Then I think there’s a misstatement that short and mid wavelength IR is 140-800 nm which is uv, visible, and short ir. And finally all objects technically give off all wavelengths but practically the peak wavelength is determined by the temperature for a perfect black body.
Thank you for the video! This was a really well laid out and done well with the timelines and history of the technology.
I’ve heard about the demon-vision goggles from the war and I am writing this before I watch, so you may have addressed it. I’m too impatient, it’s such an interesting thing so I’m gonna ask first and watch later. Are there available demon-vision goggles today?
Simon, I appreciate the metric system and all of the arguments for it. But, one thing I always enjoyed was that you said both metric and imperial.
Arguments for metric aside, it does me no good in my day to day life. Except watching CZcams videos that refuse to provide both.
I work in a large manufacturing environment in and using metric doesn't do me any good in my day to day life... how I feel about one or the other is a non starter.
I sure would appreciate it if, as well as other US viewers, you would do as you used to.
Before people start trolling and hating... if you want the US to convert to metric, until it is so, it is utterly useless in day to day life. Arguing the superiority of one over the other also alienates those you wish to hear your argument.
Thank you Simon. Keep up the great work! I've been watching you for...10 years? Shoot...its been a long time.
Moon's out. Guns out. *grabs nerf gun*
In 2-3yrs Simon will do a video on Bridged systems 🤣🤣🤣. We are apex predators bois “Moons Out, Goons Out”
i love it, how Simon butchers (or was it botchers, as in intentional?) the pronunciation of foreign names: @8:40 "sahlgerat". Even the google translator gets the name correctly converted into audio.
Ghost recon introduced me to night vision
Splinter Cell all the way, dog
@@DILFDylF I can't deny splinter cell
Don't lie, it was Paris Hilton
7:20 I see what you did there
You have very hot friends, human emission peaks around 10micron wavelength, not in the near infrared, where you’d need to be well over 1000C.
Midwave Infrared is better with fog, but long wave is no better than visible light. The latest night vision has replaced the green by a pale light blue colour “white phosphor”. Interesting initial history.
When I was in the infantry I was given a star light scope from the 60s... IT WAS GARBAGE... like wow...
My dad was a tanker in the 70´s. He said " as gunner, I could swap in this new nifty nightvision thingy, so instead of murky grey fog i would see murky green fog, but only like half the distance...."
This channel is the best! Love that beard simon!
Sir John Herschel was one of the greatest observational astronomers of all time, who belongs in the ranks of:
Eratosthenes of Alexandria
Aristarchus of Samos
Ptolemy of Alexandria
Nicolaus Copernicus
Tycho Brahe
Galileo Galilei
Johannes Kepler
Edwin Hubble
Isaac Newton
Charles Messier
Christiaan Huygens
Edmond Halley
William Herschel (his father)
Giovanni Domenico Cassini
Henrietta Swan Leavitt
Gerald Kuiper
Vera Rubin
Also the learning curve of ground radar...infared...& ultra hearing aids...
D-1\9 1CAVAM Ft Hood (Ft Cavazos)1973...when we figure out where we are...will find you
They're called nods
The guy doing the ad sounds like he ate a cheese grater for breakfast.
"night vision" isn't a misnomer. People just aren't paying attention. Night is exactly what night vision needs: a small amount (but still some) light that gets amplified to be able to see. Night is NEVER perfectly dark (though I don't know how well light amplification would work on a heavily overcast moonless night). What is /doesn't/ do is provide "lightless vision". True lightlessness REQUIRES being enclosed in some way: buildings, caves, vehicles, maybe even particularly dense forests.
cave
I thought night vision worked when you ate green crayons and strapped a cat to your rig and followed the meows!?
The Predator. Case closed it was Aliens as usual.
Dude, how many CZcams channels do you have!
51 seconds after post has to be the fastest I have ever seen a video on my feed.
Snooperscopes, snipers copes, which one was the Nintendo one?!
The Snooper featured in "Return to Castle Wolfenstein"
So....why are they green?? I didn't see that answered....like the thumbnail put out.
The screens that convert electron image to visible light are coated in Zn/Cd-sulfide, and that emits a green glow when hit by electrons
@@paavobergmann4920 and modern ones are white
@@SilverStarHeggisist Yes, because we no longer need phosphorous CdS-screens. Green has advantages, though.
@@SilverStarHeggisist
I think those are infrared, not night vision....both see in the dark, but by different means.
@@paavobergmann4920
Thank you!!
There better not be a quiz after this... cripes.
I had to basically take a test on this to pick one out to buy. was a ton of things to remember
They are made with magic
10:40 that soldier must be 15 yo max
Arrgh! It's a bald, bearded and bespectacled green channel host!
And we've been wasting hard earned money on nods ever since
Simon is so famous he can’t even be arsed to do the promotion nomore 😂😂
You have to be human for their DNA test. 😋 -Daven
WHY IS IT GREEN????
Green phosphor was used because the human eye is most sensitive to shades of green, so you can see finer detail in green. White phosphor was later used because while the eye is most sensitive to green shades, it is most sensitive to white in terms of intensity. So a white phosphor night vision will seem brighter to you even though it may not technically be brighter
Alien tech.
The human eye can see more shades of green than any other color
That's true but we are able to recognize things and have better contrast much better in grayscale which is why white phosphor is the new standard
@@bghiggy interesting. Thanks.
I'm colorblind. Why is red the emergency color? It's so dim
@@tomholroyd7519 because it does not mess with your low-light vision system. You have low sensitivity / high resolution receptor cells in your eye for colour vision in daylight, and high sensitivity / low resolution cells for monochrome vision in the dark (they are just bleached out during the day). these sensitive cells only react to blueish-green light, they are not affected by red light. So if you use just enough red light to fire up the red daylight cells, you get the better resolution for reading maps and displays, but if you switch it off, you still can immediately see in the dark as usual. If you would use blue, white or green lught of the same intensity, it would take several minutes for your night vision to come back up. Where i was working before, we had a pair of red goggles for people working in the photo lab to wear if the needed to go to the bathroom. Like you, I have inherited below-average red sensitivity, so emergency lights are super dark and murky for me. We would probably need to crank them up a few percent.
Also, in military applications, red shine doesn´t carry that much, it is much harder to spot for the enemy from a distance.
"ALL CAPTURERD"
LOL
So... why is it green?
Green phosphor was used because the human eye is most sensitive to shades of green, so you can see finer detail in green. White phosphor was later used because while the eye is most sensitive to green shades, it is most sensitive to white in terms of intensity. So a white phosphor night vision will seem brighter to you even though it may not technically be brighter
. Most modern night vision is now black and white instead
the tinting is just a design choice. just like how modern day FLIR prefer to be monochromatic black and white. there are already NVG with blue tints in the market. just to differentiate between FLIR and light amplifications. since by method it uses similar mechanisms. simply so the users dont get confused.
also, the human eye is most sensitive in the green-blueish range, so tintin green permits the user to make out faint images better. Also early screens used cadmium sulfide, that happens to glow in green when hit by electrons from the multiplier tube/channel plate
@@paavobergmann4920 white though appears brighter, which is why they're now made with white phosphor.
The irony of promoting VPN service to protect your privacy and then also promoting a dataharvesting company fucking over you and all of your family..
Love the content, absolutely hate this sponsership
nowadays ''We All Own the Night!''... with night vision scopes from China starting from 50$ (!) NVG's from 200$ and even thermal scopes from 700$, every hunter, soldier, and even enthusiast can use the technology...
Though the capability difference between a $200 night vision set and a $5000 is extreme.
But why is it green ?
@@user-sf6vy1td8x a p43 green phosphor screen emits light around 550nm which we perceive as a slightly yellow green
Green phosphor was used because the human eye is most sensitive to shades of green, so you can see finer detail in green. White phosphor was later used because while the eye is most sensitive to green shades, it is most sensitive to white in terms of intensity. So a white phosphor night vision will seem brighter to you even though it may not technically be brighter
@@SilverStarHeggisist sldo, CdS glows a pale green when hit by electrons. one of the first widely available screen coatings.
S. T. A. N. O. or stRano
Green filter just protects night blindness
Green phosphor was used because the human eye is most sensitive to shades of green, so you can see finer detail in green. White phosphor was later used because while the eye is most sensitive to green shades, it is most sensitive to white in terms of intensity. So a white phosphor night vision will seem brighter to you even though it may not technically be brighter
That was a jarring ad jump...Buy a guy dinner first😂
Pretty sure the green screen is just an artifact of the green screens and lack of blue leds in the 80s.
Wait, I thought Herschel left his thermometer there by accident, not on purpose.
Night is not total darkness...we can actually see very well without light pollution. There's a term I heard for the color of night on a radio panel show and I cant for the life of me find what I'm referring to...it was something called eidenbrown or idenbrow or something like that, I only heard the word said, not written, not an English word.
I believe also you only need heat to give off infrared.
!
"Never Sell or License"...notice "Provide to gov, upon request" wasn't included there?
That's bcuz 99% of these DNA companies are like 100% transparent and 'happy to' provide the gov with your DNA, upon request (usually by FBI/CIA/etc)
The results are also bullshit. And aside from gov request you have good old fashioned data theft.