Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83 (MC830713); site vu44.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!bellcore!decvax!genrad!wjh12!talcott!harvard!seismo!mcvax!vu44!gijs From: gijs@vu44.UUCP Newsgroups: net.physics Subject: Re: deflecting laser Message-ID: <531@vu44.UUCP> Date: Tue, 18-Dec-84 20:16:39 EST Article-I.D.: vu44.531 Posted: Tue Dec 18 20:16:39 1984 Date-Received: Sat, 22-Dec-84 01:18:38 EST References: <10800014@uiucdcsb.UUCP> Organization: VU Informatica, Amsterdam Lines: 19 In <10800014@uiucdcsb.UUCP> Kaihu Chen writes: > [] They must have a way of deflecting the laser light to make it > does raster scanning. I can imagine only two ways to do this: > 1) move the laser device mechanically. > 2) projects laser through some tansparent medium whose refractivity > is electronically controllable. > The second one seems to be a more reasonable solution to me. [] They simply deflect the beam with a rotating or vibrating mirror. The same technique is used in a laser printer: the light of a stationary laser is deflected in the x direction by a rotating mirror and then projected on a rotating (light sensitive) drum. Gijs Mos Free University Dept. of Biology Amsterdam ..{seismo,philabs,decvax}!mcvax!vu44!gijs