Can a transmitting IR LED (or an array of such devices) be focused into a finite area rather than allowed to spread out? I think this is how laser tag systems are implemented but I am not sure and I want to try this myself. If they can be focused, what what device can accomplish that? A lens? A waveguide of sorts? Thanks for any tips!
Can an IR transmitter be focused
infraredled
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Best Answer
The easy way to do this is to purchase an IR led with a narrow viewing angle. (This way you don't have to build weird contraptions to focus the IR light.) Look at the data sheets for the IR leds. Smaller viewing angle will mean a more focused IR beam.
You'll be looking for charts like this to compare the viewing angles and relative intensities:
Good Luck!