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Article #20279Re: visible infrared?
From: Jeffrey Mulligan
Date: Fri, 30 Dec 1988 19:26
Date: Fri, 30 Dec 1988 19:26
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From article <743@optilink.UUCP>, by brad@optilink.UUCP (Brad Yearwood): > Which brings me to a question. There is a second LED, presumably infrared > emitting, in the Mouse System mouse, to the left of the red LED. If you > look carefully (particularly if you cover the red LED), the infrared LED > appears to have a pale bluish-gray glow. If you look even more carefully (particularly if you exclude all ambient light), the infrared LED or whaterver it is is completely dark. Presumably the blue-gray appearace is due to ambient light being concentrated by the lens of the thing, which may have a bluish tint. -- Jeff Mulligan (jbm@aurora.arc.nasa.gov) NASA/Ames Research Ctr., Mail Stop 239-3, Moffet Field CA, 94035 (415) 694-6290
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ncar!ames!amelia!eos!jbm From: jbm@eos.UUCP (Jeffrey Mulligan) Newsgroups: sci.electronics Subject: Re: visible infrared? Message-ID: <2250@eos.UUCP> Date: 30 Dec 88 19:26:31 GMT References: <743@optilink.UUCP> Organization: NASA Ames Research Center, California Lines: 18