Laser emitter+receiver: how to

Thread Starter


Joined Nov 20, 2008

I would need to substitute an IR data transfer system (IR led and IR receiver-demodulator at 40KHz) with a laser transfer because using an IR led and a lens is not accurate, the beam spreads as range increases.
I'm working on a lasergame equipment and I would need accuracy.

I have absolutely no idea of what I should use as a receiver for the laser beam, should I use a photodiode/phototransistor? Is there some information available somewhere? Looking in Google didn't bring me any good results.

Any clue would by welcome.



Joined Apr 20, 2004
Does this mean you are trying to direct an IR beam to specifically illuminate one sensor but not be detected by another a few cm away? At what distance?