Article View: sci.electronics
Article #19816Re: Perceptual Color (was: Re: Looking for Blue LEDs)
From: Forrest Cook
Date: Mon, 03 Oct 1988 16:31
Date: Mon, 03 Oct 1988 16:31
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In article <6101@watcgl.waterloo.edu> awpaeth@watcgl.waterloo.edu (Alan Wm Paeth) writes: >a flashing b/w light can take on the appearance of color. This reminds me of one of those toys that consists of a spinning shutter over a mask: you spin the shutter, close your eyes, stare towards a bright light source such as the sun, and VOILA: colored stripes. Some kind of aliasing I imagine. So, if you take a fast response white light source and modulate its duty cycle and frequency, will you fake the eyes into seeing colors? Incandescent's probably switch too slow, that leaves such things as Xenon strobes and LEDs. White LEDs are probably possible: red, green and BLUE LEDs could be put in close proximity and ~mixed~ with a diffuser to yield what would be percieved as white light. The three LED currents would probably need tweaking to get true white. [Adrift in a sea of ideas.]
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!husc6!ncar!stout!cook From: cook@stout.ucar.edu (Forrest Cook) Newsgroups: sci.electronics,rec.audio,comp.graphics Subject: Re: Perceptual Color (was: Re: Looking for Blue LEDs) Summary: a few more comments Keywords: black/white -> color Message-ID: <790@ncar.ucar.edu> Date: 3 Oct 88 16:31:13 GMT References: <1138@nmtsun.nmt.edu> <862@ritcv.UUCP> <255@rna.UUCP> <4422@lynx.UUCP> <871@ritcv.UUCP> <870@dlhpedg.co.uk> <6101@watcgl.waterloo.edu> Sender: news@ncar.ucar.edu Reply-To: cook@stout.UCAR.EDU (Forrest Cook) Organization: Field Observing Facility, NCAR, Boulder, CO Lines: 19