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Colour-changing magnifying glass gives clear view of infrared light

cam.ac.uk

41–50 of 55 posts

Re: Colour-changing magnifying glass gives clear view of infrared light

#41
post #23

Earlier quoted context omitted.

I think you can just back(front?)light it.

Wouldn’t that defeat the purpose of everyone within 5 miles can see your glowing eyes?

You put a filter over the front that blocks your charging wavelength, so it's only used internally.

Re: Colour-changing magnifying glass gives clear view of infrared light

#42

Earlier quoted context omitted.

Wouldn’t that defeat the purpose of everyone within 5 miles can see your glowing eyes?

The Russian T-90 tank uses infrared emitters as countermeasures, looks like a pair of angry eyes: https://www.army-technology.com/wp-content/uploads/sites/3/2...

Wouldn't this be a great target for an IR guided missile?

Re: Colour-changing magnifying glass gives clear view of infrared light

#43

Earlier quoted context omitted.

The Russian T-90 tank uses infrared emitters as countermeasures, looks like a pair of angry eyes: https://www.army-technology.com/wp-content/uploads/sites/3/2...

Wouldn't this be a great target for an IR guided missile?

Exactly. Missiles would hit the emitters, where the armor is the thickest, giving the crew and tank the best chance of survival.

Re: Colour-changing magnifying glass gives clear view of infrared light

#44

Earlier quoted context omitted.

The Russian T-90 tank uses infrared emitters as countermeasures, looks like a pair of angry eyes: https://www.army-technology.com/wp-content/uploads/sites/3/2...

Wouldn't this be a great target for an IR guided missile?

The commander's tank doesn't have them.

Re: Colour-changing magnifying glass gives clear view of infrared light

#45
post #17

Earlier quoted context omitted.

Not really, the coating on fluorescent tubes uses a quite different mechanism. The phosphor coating of fluorescent tubes downconverts UV light into visible wavelengths (is, lower energy/frequency) through the process of fluorescence. The UV photons excite the electrons of the phosphor molecules to higher energy states, after which they emit photons at lower frequencies/energies (visible light) as they fluoresce back…

Do you have an URL or reference for this film? Thanks.

https://www.newport.com/p/F-IRC2-F?xcid=goog-pla-F-IRC2-F&gc...

Re: Colour-changing magnifying glass gives clear view of infrared light

#46
post #25

I've always wanted glasses that can convert color to grey-scale. Wear them and walk into a black-and-white movie.

You could use Oculus Quest passthrough video, I suppose. Grayscale alone doesn't give you a black and white movie feel, though.

Re: Colour-changing magnifying glass gives clear view of infrared light

#48
post #43

Earlier quoted context omitted.

Wouldn't this be a great target for an IR guided missile?

Exactly. Missiles would hit the emitters, where the armor is the thickest, giving the crew and tank the best chance of survival.

But if you knew the tank model a computed offset would negate that...

Re: Colour-changing magnifying glass gives clear view of infrared light

#49

Earlier quoted context omitted.

The Russian T-90 tank uses infrared emitters as countermeasures, looks like a pair of angry eyes: https://www.army-technology.com/wp-content/uploads/sites/3/2...

Wouldn't this be a great target for an IR guided missile?

They supposedly only enable them when they know the tank is being actively targeted by a missile that the countermeasures are effective against. Supposedly.

Re: Colour-changing magnifying glass gives clear view of infrared light

#50
post #36

Earlier quoted context omitted.

Yep, if it works at all, ITAR will slap it with a "Don't even think about using this for anything" label.

No, if they slap a label on it, it isn't "Don't Use It", it is "Don't even think about exporting this without permission.". It may have been relaxed, but regular IR cameras that we can buy and use here everyday in the US may land you in jail for selling them in eBay and shipping them to a customer in China or Iran. But we can buy, sell, and use them freely.

or even to Canada
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