Re: Presale Closed - The Cypreus II - A Copper Laser host by Sinner [25/25 Pre-Ordere
My single XL arrived today too. It looks great, the fins do make it look better than is apparent in the photo. A very nice and solid host, very few scratches or dings on mine. Very happy with it so far. :)...
The smallest possible unit of blue is more powerful than the smallest possible unit of green (shorter wavelength vs longer wavelength).
With on the order of 10^18 photons per second from a 1W 445nm laser and more from a 1W 520nm laser, the relative power of each photon seems fairly irrelevant...
Well each blue photon contains more energy but the way we measure lasers doesn't count photons but total power.
So for power 1W 445nm = 1W 520nm and the 520nm is putting out more lower energy photons.
All sorts of biotech applications. A useful wavelength. Good for measuring the concentration of molecules that absorb well there.
Also florescent markers like: Alexa Fluor® 488
And these guys think $4000 is very cheap.
What I think of as "laser beam brightness" doesn't seem to match the CIE data very well (the tool J0SHUA linked).
When comparing my 400mW 532nm to my 2W 445nm (nominal powers), both beams seem very bright. The green beam is more noticeable or brighter but the blue one looks more intense in a...
I will second what has already been said: not at all. :)
At 400mW the laser is much brighter than needed and drowns out the stars you point at, even the few bright ones you can see on a street lit urban night.
I would expect the amount of power that is optimal depends on the amount of...
A beam expander makes the dot more visible at range because it is smaller but it also makes the beam less visible.
I have a 10x beam expander with my 400mW 532nm handheld and while the spot is a lot smaller at long ranges the beam is much less visible, 10x the diameter means 10x less power per...