Subject:
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Re: color sensors
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 19 Feb 1999 03:37:17 GMT
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Original-From:
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Mike Jones <michaelj@wt.#NoSpam#net>
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Reply-To:
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michaelj@wt.+saynotospam+net
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Viewed:
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1019 times
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> I wonder whether there are some phototransistors out there that have peak
> sensitivity to a small range of the visible spectrum. Preferably to "one
> color". Can anyone fill in here?
What about putting different color filters in front of a photo transister, like
you would on a camera. You could then enhance certain colors by filtering out
the others. You may have to deal with some reduction in sensitivity but it may
be worth a try.
Mike
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Message has 1 Reply:
 | | Re: color sensors
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| I believe that you will find that most photo transistors are sensitive to a very narrow range of frequencies, mostly in the IR range. OTOH a photo resistor is sensitive to a much wider range of frequencies and may be usable with a (colour) filter. (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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