[Laser] Off the wall thought...

[Steve J. Noll]

I picked up a 'toy' IR viewer on eBay, a "Spy Gear Ultimate Infrared 
Night Vision Goggle" that works incredibly well. Easily sees flashing IR 
remotes, and sees 'in the dark' quite well.
Coupled with a set of IR longpass filters from eBay "55mm Infrared 
Infra-Red Filter Kit: 720+760+850+950 nm"  you can home in on what 
wavelength you're seeing.
But, if you're just trying to characterize the pulses, a cheap silicon 
photodiode and oscilloscope would be better.
The IR viewer cards don't respond fast enough to discern individual 
pulses, and they're not terribly sensitive.
A cheap Radio Shack type card worked better than a more expensive one I 
bought from Thor Labs. When I complained to Thor they sent me another 
which worked just as poorly!

*Steve WA6EJO
http://www.qrz.com/db/WA6EJO

*On 12/16/2014 9:11 PM, KD7JYK DM09 wrote:
> Is there a filter material, something along the lines of thin glass or
> plastic, that can convert IR into the visible spectrum?  For example, hold
> up a filter in front of an IR LED remote control and see the pulses of
> light?  More importantly, would such a thing be fairly inexpensive?
>
> Kut
>
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