Subject:
|
Re: color sensors
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Fri, 19 Feb 1999 22:37:09 GMT
|
Original-From:
|
K.L.McKinnon <klmckin@magmacom!stopspam!.com>
|
Viewed:
|
3102 times
|
| |
|
|
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
|
|
Message has 1 Reply:
Message is in Reply To:
 | | Re: color sensors
|
| (...) 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 (...) (28 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
This Message and its Replies on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
