- Jan 18, 2016
I bought some single mode IR laser diodes to play around with which should work well for that purpose at 250-300mw output, they have an extremely small emitter which means when expanded to just a few mm diameter can produce a very small amount of divergence, easily the 1/4 mRad of that IR scope you can't buy, or even lower. Just depends on how much it is expanded. What is the maximum diameter spot size you want at 500 yards? I will see what the numbers calculate at for that distance to figure out what the spot size would be that far away. Call sign here is KL7FB.
IR Laser Class:Class 1 Eye-Safe
IR Laser Output:0.7mW
IR Laser Divergence:0.3 mradIR
IR Laser Range:400 – 450 yards
I guess my next lesson should be to understand the full specs and figure out how to calculate all this myself.
This is what my current Steiner IR laser looks like at about 20 feet. Not a very good photo but does show size compared to light switch.