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Old 10-19-2010, 06:06 PM #49
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Default Re: would one of these be good in a projector?

Actually, it looks to me like your green's bigger..

I'm always at work when I'm on here, so I can never just run off and take pics, but at 30m all three of the lasers in my current RGB have nearly identical beam diameters.. but at aperture there are huge differences, with the green being smallest at 1.5mm, the blue in the middle at 1mmX4mm, and the red being the biggest at 5mmX7mm.

One has to wonder just how far to take pursuit of beam quality in laser projectors, since, for example, if you and I were in an auditorium doing a show for a concert, out of everyone in attendance, only you and I and about 3 other people (assuming 3 other laser show enthusiasts are there) would notice these details. Beam quality is of limited importance when the beam is pulsing rapidly and moving around at thousands of points per second since no human being could tell if it's a flat beam, a square one or TEM00, or what their respective divergence is. It's not like sound, where every nuance (or lack thereof) is noticeable to almost everyone.


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Old 10-19-2010, 07:05 PM #50
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Default Re: would one of these be good in a projector?

indeed you are correct people wouldnt notice but i would and im picky

im at a point in my laser likfe now there power isnt the be all and end all. i want beam quality and power.

my green is 1.5mm, red 3mm and blue about 2mm at apeture. so pretty good andn at distance blue and red are same size is not smaller than green
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