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Is 0.625 Divergence and a nice round dot at 80m better than should be expected from a $15 Green Laser 532nm 80mW DPSS ?
Are there any Singlemode Laser diodes over 1 watt of 515nm/520nm/532nm ?1w 520nm NDG7475 will have a beam divergence like the NDB7875, it's not bad but I would love to see even a half watt of single mode 515nm.
I just did a much more accurate test of the mRad at a much farther distance and the first calculation of 0.625 Divergence is off.
These measurements were taken much more carefully and over a much larger distance, The 2mm beam is 138mm at 160 paces or 122 meters or 405 feet which gives a true mRad of 1.11 but the dot at that distance is still very round and bright, I don't think a very round and bright 1.11 mRad beam for $15 is all that bad is it ?