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Old 11-09-2013, 03:06 AM #1
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Default Medium Wave IR

I have some diodes here which must be of a longer wavelength as my usual method of
wavelength measurement is not going to work. At well over 1W of output, there is almost
nothing on either of the cameras even when looking directly into it. I can feel the heat, so
there is definitely light coming out, but I have no way of seeing it. So far all I can think of is
either using a mirror and photodiode to "cut into" the orders or maybe some of that plastic
film that changes color with temperature.


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Old 11-09-2013, 06:18 AM #2
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Default Re: Medium Wave IR

There are IR sensitive fluorescent materials made for this purpose.
Check out Ebay.
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Old 11-09-2013, 08:04 AM #3
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Default Re: Medium Wave IR

You could buy a spectrometer

http://www.ebay.com/itm/Ocean-Optics...item43c03b54b6
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Old 11-09-2013, 04:11 PM #4
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Default Re: Medium Wave IR

^Except that particular one only goes down to 850nm.

Mr. Wee's option is cheapest. I've got one of these, and it works down to 980nm at least. Not sure about now much lower it goes. The indicating material is cement-like, so it can take a lot of power.
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Old 11-10-2013, 02:04 AM #5
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Default Re: Medium Wave IR

Okay, thanks guys. I'll give the IR card a shot.
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