With all these exciting new companies offering affordable high(ish) powered laser projectors, red(637) is really standing out as an expensive wavelength. Blue is mega cheap, green is sort of the same, but now it's red that is pulling on the purse strings if you decide you must have the 637nm.
I recently got a 3W RGB from a well know Chinese company. 1.5W of Blue, 1W of Green and a sorry arse 0.5W of Red(637)
Viewing any Que which contains red really disappoints me as I can barely see it (IF AT ALL) in beam shows unless there is TONES of smoke. Where as the blues and even more the greens stand out.
But surprisingly a white is always a nice white. Why is this? That's not the point though, I'm not overly fussed about whether a white is a nice white, I'm more bothered about not seeing any red in the air when I blast out a red Que.
So I think unless you have over 1 watt of 637, you're not going to get any wow from it. And this is pricey!
I don't understand why this red is more pricey and all the optic stuff and I don't have the brain to work it out but what about 635, is it possible to use optics to correct the divergence? Then we can forget about 637 and enjoy some beams with "OOOOOOO" instead of "OH".
I'm considering my next projector and I need lots of power, but anything with 637 is way to much for me. So I'm probably going to get one with 635 inside. Do you think I still might be disappointed with the divergence from the 635? I'll be at outside venues with beams, but with about 10% of the night doing some graphics as well and the current distance between the laser and a surface is about 40 meters. The distance may also get larger over time.
What do you think?
Cheers,
Graham