Subject:
|
Re: color sensors
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Fri, 19 Feb 1999 03:37:17 GMT
|
Original-From:
|
Mike Jones <michaelj@wt/nospam/.net>
|
Reply-To:
|
MICHAELJ@WT.NETnomorespam
|
Viewed:
|
788 times
|
| |
|
|
> 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
|
|
Message has 1 Reply:
 | | Re: color sensors
|
| 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)
|
3 Messages in This Thread:
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
