[Noisebridge-discuss] High-output IR LEDs?

[Jonathan Foote]

Thanks Mitch for expert recommendations!

Josh, I have a few of these kicking around if you want to play with
them. Don't know specs on the diodes but they seem to do the job:
http://www.bgmicro.com/index.asp?PageAction=VIEWPROD&ProdID=10866

I worked with IR cameras for a patent I did a while back. I found the
trick was to mod visible cameras by removing the IR-blocking filter.
Some recent cameras have these integrated into the sensor chip but for
most it's a separate dichroic glass (has a slight pinkish sheen when
seen off-axis). Usually easy to just remove. For best results you will
want to block visible light, a good choice is the Kodak Wratten #87
available from Edmund Optics. It a gel filter and you can cut out the
same shape as the IR-block you are swapping it for.


On Sat, Apr 4, 2009 at 1:24 PM, Josh Myer <josh at joshisanerd.com> wrote:
> I'm looking for a good IR LED or IR LED cluster to flood a flat
> surface.  This leaves me wanting wide angles and high power.  Does
> anyone have recommendations for parts (could you sell me a few you've
> got on-hand, even?  I'll pay hefty markup =) )?
>
> In the same vein: has anyone used cheap webcams with IR with any
> success?  I'm looking to flood a wall with IR, then use a webcam to
> watch silhouettes move across that wall.
>
> Thanks!
> --
> Josh Myer   650.248.3796
>  josh at joshisanerd.com
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