I've noticed a bit of variation in spot size from laser-to-laser, and haven't measured mine or Ann's to extrapolate the beam diameter at either end, but if you feel you're in the ballpark, go ahead, with my blessing and thanks- anyone can leave a comment. These green ones have a lens so there is probably some variation from slight differences in both diode and lens placement. I suppose to be precise you'd have to measure it at two locations, probably one very close to the exit aperture and again as far away as convenient. This would yield the angle of beam divergance. A good idea prior to Laser Test II.

From: Canopus56 <canopus56@yahoo.com>

Suggest adding a comment to the album with the observed beam diameter at your end. 3-4 meters??

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