Aiki1 said:
How much brighter do you think a 10mw is than a 5mw at 650nm?
I was gonna be an *** and say twice, which it still is, but we don't see it as twice as bright.
I was told the human eye doesn't double light like we would think, but I am not sure. I think it is close to 1/3 brighter. I was asking about my 100mW green and my 10+mW (10 to 20mW) blue. He quoted some math but I didn't catch it... He said that at 20mW, the 100mW green is 5 times (20*5=100) as bright, but we will see it as around 2.5 to 3 times as bright... And then you have to think about how well both lasers are focused and this and that...
Most 5mW pointers are rated at <5mW, meaning they could be 4.99 or 2, both are less than 5. I have been hopeing to find a 25 to 40mW red for a little while, but all the ones I find are close to $100 or more. My 100mW green was $190+ with shipping. I had figured I could find a 100mW red for... I dunno, half that... but no... This is the best price I have seem for a red module. there is a 20mW hene for $119 with ps, but $65 for even a 30mW is good enough for me.
(well next payday!) :lolsign: If you get one sooner make a thread, I would like to see some pics...