Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site amdahl.UUCP Path: utzoo!decvax!decwrl!greipa!pesnta!amd!amdcad!amdahl!nzm10 From: nzm10@amdahl.UUCP (Neal Macklin) Newsgroups: net.graphics Subject: Re: Stereo Picture TV Message-ID: <1762@amdahl.UUCP> Date: Tue, 9-Jul-85 22:43:39 EDT Article-I.D.: amdahl.1762 Posted: Tue Jul 9 22:43:39 1985 Date-Received: Wed, 10-Jul-85 19:20:40 EDT References: <8794@ucbvax.ARPA> <814@turtlevax.UUCP> Distribution: na Organization: Amdahl Corp, Sunnyvale CA Lines: 39 > In article <8794@ucbvax.ARPA> bradley@esvax.UUCP (Paul Bradley) writes: > > > > It seems like all that is needed is an electrically controllable > >polarizer in front of the screen... > > This is exactly what a company in Mill Valley (I believe), California is > marketing. One problem is that the refresh rate per eye is only 30 Hz, > whereas normal television is 60. The flicker is noticeable, and you do > have to wear glasses with electrical wires attached... > > Ken Turkowski @ CADLINC, Menlo Park, CA I think the vertical resolution is also halved, because they transmit both left and right frames within one vertical sweep interval. (To use standard TV bandwidth). You then modify your TV's vertical sweep to go twice as fast and their box connects the glasses to automatically switch left and right as the appropriate half is being scanned. I saw the system at NCGA two years ago and they were showing "House of Wax" (?). It looked pretty good to me. The flicker wasn't annoying. You could see the spaces between the scan lines, but they claimed you could play with the focus to make the scan spot taller. They also showed a still image of a 3D line drawing which took some staring at (at least by me) until I saw it in the proper perspective. I don't remember the name of the company, but I remember the president's name: Lenny Lipton. He wrote a book on stereoscopy that I've been meaning to send for. I remember him because he would pull the glasses out of your hand if you tried to touch the lens. He also didn't like it if you held the glasses up to your ear so you could hear them buzzing. I've heard he's been better behaved at other trade shows. I think the glasses need quite a high voltage to work, so maybe he was worried I'd get a shock. -- Neal Macklin (408) 737-5214 ...{hplabs,ihnp4}!amdahl!nzm10 [There are no opinions expressed in this article].