Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83 SMI; site parallel.uucp Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxn!ihnp4!houxm!mtuxo!mtunh!mtung!mtunf!ariel!vax135!petsd!pesnta!parallel!kenm From: kenm@parallel.uucp (Ken Musgrave) Newsgroups: net.graphics Subject: Re: Stereo Picture TV Message-ID: <147@parallel.uucp> Date: Fri, 12-Jul-85 15:22:12 EDT Article-I.D.: parallel.147 Posted: Fri Jul 12 15:22:12 1985 Date-Received: Sat, 13-Jul-85 14:59:46 EDT References: <8794@ucbvax.ARPA> <1944@ukma.UUCP> Reply-To: kenm@parallel.UUCP (Ken Musgrave) Organization: Parallel Computers, Inc. Lines: 24 Summary: In article <1944@ukma.UUCP> sean@ukma.UUCP (Sean Casey) writes: > > >Now what I'D like to see is a 3-d system where you didn't have to wear glasses. > > Perhaps you've not heard of the varifocal or vibrating mirror class of 3d display devices. The image of a CRT is relected from a piece of aluminized Mylar stretched across a woofer (speaker) which deforms it (very close to spherically) at 30hz. The focal length of the mirror changes, and the CRT's display is synchronized with it. Thus one gets a true volume-filling 3d display without the need for any special glasses. It has been implemented for both random and raster scan display modes. Groups at University of Utah and North Carolina have devoloped these devices, and there was one commer- cially marketed, primarily for seismic data and medical imaging. Advantages include variable point of view (unlike stereoscopically recorded images); disadvantages include low display brightness and transparency of images (i.e., no hidden surface removal). It is ideal for display of CAT scans and medical NMR images, but would never work for movies. Ken Musgrave CS net: ucbvax\!ucscc\!ucscv:bozo UUCP: ucscv\!bozo Computer and Information Science Board UC Santa Cruz, Santa Cruz, CA 95060