Re: Optical Sensor (different from the 2-d sensor)
- From: Tim Wescott <tim@xxxxxxxxxxxxxxxx>
- Date: Mon, 07 Jul 2008 12:05:47 -0700
Howhurley wrote:
Hi again. I am looking for an optical sensor, probably LED based,
maybe laser diode, that can be mounted on a thin PCB. It needs to be
fairly small. I am designing a small retroreflective system from
inside a slot machined into a molding with a piece of reflective tape
approx 3 ft away.
Any takers on this one?
LEDs and lasers both emit light.
Do you mean you want a sensor designed specifically for use with a retroreflector?
You're probably stuck with using a PIN photodiode and LED, and doing your own optics.
But your request is so vague it's impossible to tell.
How bright are the other lights in the room? How many of these devices will be in the room working together? Does it have to work while looking at it's brother right next to the reflective tape? How wide is the slot? How much accuracy can you pay for? Etc.
--
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html
.
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