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- Newsgroups: sci.electronics,rec.video
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- From: ncc1701@madoka.its.rpi.edu (Mark O. Chadwick)
- Subject: Re: Blue Lasers
- Message-ID: <1myx_6m@rpi.edu>
- Nntp-Posting-Host: madoka.its.rpi.edu
- Reply-To: ncc1701@acm.rpi.edu
- References: <Bs26IL.GwE@news.cso.uiuc.edu>
- Date: Mon, 27 Jul 1992 21:12:55 GMT
- Lines: 37
-
- tmkk@uiuc.edu (Khan) writes:
-
- >I heard a brief tidbit in one of the popular media about (IBM?)
- >inventing a blue laser, making extremely high resolution laser
- >projection TVs possible by using a red, a green, and a blue laser in
- >combination. Ultra high res, no visible pixels, etc. etc. Sounds like a
- >videophile's dream come true. Anyone know any more about this new
- >development? Will it make LCD light valve projectors obsolete before
- >they even get to market en masse?
-
- Hmm...I doubt it. A couple of friends and I built a laser-sourced
- projection TV in college (red only) and had tremendous problems in
- controlling flicker. We could get rid of it, but only at the
- expense of a jittery picture and almost NO brightness, or lotsa
- brightness, stable picture, and LOTS of flicker.
- I doubt lasers will be a viable alternative until there is some method
- of building very fast scanning apparatus and make them fail-safe as
- well. (You'd need powerful lasers for decent brightness in a
- naturally lit room, and if your scanning device fails, you're
- liable to burn a hole in the wall or someone's eyes...)
-
-
- >BTW, the shorter wavelength of the blue laser is also supposed to allow
- >much higher storage densities on laser-read media (CDs, LDs). Several
- >hours' worth of music would be able to fit on a 5" CD, and LDs would for
- >the first time be able to hold a full movie's worth of HDTV info
- >(current LD technology can only hold a few minutes' worth of HDTV
- >program).
-
-
- Now, THIS is what I'm waiting for! I heard some stuff on this too,
- but it was all rather sketchy. Anyone else hear anything?
-
-
- --
- ---
- Mark "Emerson" Chadwick -- ncc1701@acm.rpi.edu chadwickmo@space.laafb.af.mil
-