AnAppleSnail
Flashlight Enthusiast
Re: Wicked Lasers 445nm 1W(!) portable deathray
Much cheaper, too! Making a small divergence (You'd need to have it an order of magnitude less to make a real difference) requires a larger lens.
Ah, I see now that I misread your post - I thought you were saying that it would be 1.51 (or maybe 15.1?) mm across at that point. No harm meant, and I realize I should have used less harsh language.All the math is correct. The reason you're getting 151.5mm instead of 150.0mm is the original 1.5mm diameter of the beam leaving the aperture.
The expansion due to divergence is 150.0mm, and add the original diameter gives you 151.5mm. Simple "off by one" error.
That's what I get for leaving my calculator in degrees. Though that does seem like a pretty poor divergence, very disappointing in terms of laser power, but in terms of having these things in the public hand, a very good "safety net" so to speak.
I now concur with the 151.5mm at 100m.
Pretty disappointing IMO, but much much much much safer.
Much cheaper, too! Making a small divergence (You'd need to have it an order of magnitude less to make a real difference) requires a larger lens.

