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Uh https://www.laserpointersafety.com/rules-general/rules-outdoor/rules-outdoor.html

Blame it on the red phosphore. Yeah right

Go for it. You'll be fine. It's probably fluorescence you see.

The name of the color is chartreuse. Chartreuse-yellow to be precise.

Yes, there are phosphorescent materials. Get the hint?

Huh?

In the flashoholic world there's a term called "throw" in case you do not know, throw describes how far a flashlight can effectively illuminate a surface. Do you know the throw of this laser?

Find a dust cap. Check the lens to make sure it is clean.

Did you machine this diy beam expander?

Visually the laser looks unfinished. Is it possible to add extra length with a threaded part? An extention would also protect that sticking out part.

It seems to me this safety representative misunderstood your incorrect terminology. What you have done is attenuate the beam intensity. Advise this representative what you did.

Brainiac reviews the Sanwu Tracer 20W power meter and the Lasertack LR2 Spectrometer using various lasers he owns.

See this. ISS Flash Project

Looks like a piles of teensy weensy tiny rocks.

Aqwest proposes to develop a novel, compact and rugged high-peak power blue laser in the 0.45-0.49 m range. The innovative blue laser is based on a frequency-quadrupling of 1.9-μm laser output from ceramic Tm:Lu2O3, a novel high-performance solid-state laser (SSL) material that is new becoming...

I don't no nothing about adapters. But I do know that a lens that is curved as I suspect those G lenses are are much more difficult to align than a lens with one flat side. Something else to experiment first with educational grade lenses. If that beam expander comes apart to remove the...

There is a reason why lenses are placed with certain surfaces facing the diode. Those reasons are not critical for hobbyists. But if you want to know pop Edmund an email. Something that you might want to do is swap out the negative focal length lens with a lens that has a shorter focal length...

No.

I'd only use it for balloon popping, cutting trash bags and tape burning and zapping creepy crawlers and flying pests. So don't worry. P.S. Did I forget any other useful things to do?

Even though this is not a laser this is what my next laser will do. This vid was shot at dusk using tracers bullets in rapid fire giving the effect of a laser beam.