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 22:37:09 GMT
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Original-From:
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K.L.McKinnon <klmckin@SPAMCAKEmagmacom.com>
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Viewed:
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801 times
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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.
K.L. McKinnon
Mike Jones wrote:
>
> > 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:
Message is in Reply To:
 | | Re: color sensors
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| (...) 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 (...) (26 years ago, 19-Feb-99, to lugnet.robotics.handyboard)
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