On Thu, 10 Feb 2000, John Davis wrote: > Since what you are actually trying to do is to reproduce the method > of a trigon (as Chris pointed out), why not use a real laser trigon. > Bob Terwilliger has one on his webpages at > http://www.shadow.net/~bobt/trigon/trigon.htm (based on a transit > mechanism), and I published a cheap-and-cheerful small version in the > BSS Bulletin October 99.
John: Are you at liberty to re-print that design for us, say to put up on the archive sites? Dave Bell
