Subject:
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IR sensitivity of CCD cameras
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 24 Feb 2000 14:39:00 GMT
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Original-From:
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John Barnes <barnes@sensorsNOSPAM.com>
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Viewed:
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810 times
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As has been noted, a lot of CCD cameras are very sensitive to
IR. You can take advantage of this by building IR illuminators
out of half a dozen or so higher power IR LEDs. I think radio
shack sells them. String them in series, add the appropriate
resistor for the voltage you are using for the camera and bingo,
it sees in the dark! (Silicon's peak sensitivity is actually in
the IR, which is why quite a lot of camera's employ an IR filter!)
Now your RCX can go wheeling around in the dark, unseen by mere
humans. Let's hope they're not groping around in the dark for
the light switch wearing heavy boots!
JB
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Message has 1 Reply:
 | | Re: IR sensitivity of CCD cameras
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| I understand that is a wide variation to IR sensitivity in CCD and CMOS cameras. Does anyone know of a list rating either sensitivity or what to look for in the camera specifications. Robb, ----- Original Message ----- From: John Barnes (...) (25 years ago, 25-Feb-00, to lugnet.robotics)
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