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We are still working on a security IR beam and need to focus a beam on an IR collector for switching. Actual power is not yet known but relatively low power if we can focus the beam reasonably at long distance. I am curious if an adjustable collimating lens will allow focus of the waist at...

Being new here, I will mention that our primary business is engineering and CNC machining but more or less looking to buy or build some IR lasers to be used for perimeter security. Probably bounce the beam over 1-3 mirrors before spotting on an IR collector. I experience with electronics and...