Path: utzoo!utgpu!attcan!uunet!lll-winken!tekbspa!optilink!brad
From: brad@optilink.UUCP (Brad Yearwood)
Newsgroups: sci.electronics
Subject: Bright LEDs, visible infrared?
Message-ID: <743@optilink.UUCP>
Date: 30 Dec 88 00:40:34 GMT
Organization: Optilink Corporation, Petaluma, CA
Lines: 16

After the recent discussion of bright LEDs, I got some from the local
Radio Shack (their entire supply - 3 pieces), and was quite impressed.

The brightest LED I had previously seen was the visible red one in the
bottom of the Sun (Mouse Systems) mouse.

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.  Is the LED actually emitting
some bluish light, or does the eye give false-color responses to some
frequencies of intense IR?

Brad Yearwood
Optilink Corp.  {pyramid, tekbspa, pixar}!optilink!brad
Petaluma, CA