kilian@poplar.cray.com (Alan Kilian) (06/05/91)
lance@motcsd.csd.mot.com (lance.norskog) Asks: > 1) You reported that your Sega Goggles "don't go very dark". > Do you have an extinction ratio rating for them? I do now. The Sega(tm) glasses have a pair of LCD shutters in them and a dark plastic lens in front of the LCDs. The dark plastic is about a 3 stop reduction (Only 12% gets through) The LCDs are about 2 more stops so here are the numbers: LCD transparent 3 stops reduction (12%) LCD opaque 5 stops reduction ( 3%) So the extinction ratio is 2 stops (1:4) which isn't very good. Well let's put it in perspective they only cost $30.00 after all. -Alan Kilian kilian@cray.com 612.683.5499 Cray Research, Inc. | "The Fragile X Syndrome may me the most 655 F Lone Oak Drive | frequent cause of inherited mental Eagan MN, 55121 | retardation". Science 24-May-1991 PP1097