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- From: jlange@radian.uucp (John Lange)
- Newsgroups: sci.physics,sci.electronics
- Subject: Lasers/collimated light in RGB? (full repost)
- Message-ID: <1992Dec30.161427.19053@radian.uucp>
- Date: 30 Dec 92 16:14:27 GMT
- Organization: Radian Cormp.
- Lines: 21
-
- My first posting was truncated. Here's how it should have read.
-
- In nightclubs I have recently seen light effects which apparently
- use bright red, green, and blue lasers which are modulated with
- mirrors (I think) to do interesting things like project color
- images on a wall. The red could be a simple He-Ne laser, but what
- about the green and the blue? I know these light sources can be
- made with expensive and sophisticated lasers, but how could this
- be done as simply and inexpensively as possible? Is it possible
- that these really weren't "lasers" and were instead some sort of
- collimated and color filtered bright light sources?
-
- I'm also curious how the light sources are modulated to get fairly
- decent resolution at high refresh rates. Just guessing, in one
- setup I would say the resolution was at least 100 x 100 on the wall,
- maybe a lot better, with a refresh of around 60 Hz. This may be
- implemented with a set of really fast stepper moters, but I'm not
- sure. Anyone know how these tricks are done? Thanks in advance.
-
- John Lange (jlange@zippy.radian.com)
- Radian Corp. (512)454-4797
-