stever@videovax.Tek.COM (Steven E. Rice, P.E.) (10/20/87)
In article <2538@cbmvax.UUCP>, George Robbins (grr@cbmvax.UUCP) writes: > . . . > If I remember correctly, high speed oscilloscopes use a blue phospher for > photograpy, while radar screens and other long ultra-long persistance > display use this ugly yellow-green stuff. The blue phosphors matched the sensitivity peak of the film, allowing photography of fainter traces. The "ugly yellow-green stuff" has an amazingly long decay time (a trace is readily visible 10-20 seconds later). Steve Rice ----------------------------------------------------------------------------- new: stever@videovax.tv.Tek.com old: {decvax | hplabs | ihnp4 | uw-beaver}!tektronix!videovax!stever