Note to all, I deleted the post he's talking about because I realized his point just a few moments later. :yabbem: You're right though, considering the red dichro I mentioned was $245, and most of their stuff is that expensive or more, it's not really practical or possible.
well I've seen a strange phenomenon some day when I has "playing" with optics.
I tuned down my PSU to 4.2v, 400mA. Got a weak 445 beam.
Then I put a biconvex lens on its front (far away). With no light, the results were so strange that I had to look down on my goggles, the light curved, like . (blue dot = emitter)
. \ (blue lines = laser line in the air)
.. \__. (blue dot = on the wall)
I'll draw it sometime. I tried to get the beams together, but the two lasers were heating and I was afraid because they aren't using heatsink. I'll test more.
edit: oh it curved only some degrees. dunno why just a thought.