home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky sci.physics:22020 sci.electronics:21842
- Path: sparky!uunet!mcrware!grayhawk.rent.com!iowegia!quest
- From: quest@iowegia.uucp (Steve J. Quest)
- Newsgroups: sci.physics,sci.electronics
- Subject: Re: Lasers/collimated light in RGB? (full repost)
- Message-ID: <DkRowB6w165w@iowegia.uucp>
- Date: Fri, 01 Jan 93 00:51:24 CST
- References: <1992Dec30.161427.19053@radian.uucp>
- Distribution: world
- Organization: Iowegia Public Access Usenet/UUCP, Clive IA USA.
- Lines: 18
-
- John,
-
- Since it is illegal these days to scan the audience with
- laser light- even if the beam is moving very quickly, the newest
- method is to collimate Xenon light, which can be filtered using
- Dichroic filters or reflected using Dielectric mirros to get the
- color effects you want. This collimated Xenon light (from an
- intense Xenon CW lamp) is injected into a fiber optic cable, and
- transported to the beam head. This way cool light is provided to
- the beam head- free from the heat of the lamp. It is then scanned
- through the "fog" or directly into the audience...............sq
-
-
- (the scanners used are inductive analog devices- they have
- feedback so the system knows at all times where the mirrors are.
- They are not capable of really fast movement, they tend to become
- affected by inertia above rep rates of > 20kc.)
-
-