??optical mouse LED brightness

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Article #6325

#6325

From: Alan Erickson
Date: Sat, 15 Aug 1992 01:57

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	Hi, all!

	A simple question(?): I'm sitting in front of a Sparc IPX;
	I can produce some heavy spots in the eyes by looking
	at the optical mouse LED. How in the world do they
	get an LED that bright? 

	Is it simply a "super-bright" LED?

	Is it a high-current, low duty cycle pulse? 
	If so, can this be done with any
	LED as long as you mind the average power dissipation rating?
	There are maximum forward current ratings; are these only
	applicable to continuous-duty operation?
	If operated in this way, is the expected device 
	lifetime affected?
	If operated in this way, how does power dissipated relate to 
	power output (does the device become less/more efficient)?

--------------------------------------------------
Alan Erickson, Perpetual Student

erickson@jupiter.nmt.edu
--------------------------------------------------

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Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!decwrl!purdue!yuma!longs.LANCE.ColoState.EDU!ae569981
From: ae569981@longs.LANCE.ColoState.EDU (Alan Erickson)
Newsgroups: sci.electronics
Subject: ??optical mouse LED brightness
Message-ID: <Aug15.015757.40400@yuma.ACNS.ColoState.EDU>
Date: 15 Aug 92 01:57:57 GMT
Sender: news@yuma.ACNS.ColoState.EDU (News Account)
Reply-To: ae569981@longs.LANCE.ColoState.EDU (Alan Erickson)
Organization: Engineering College, Colorado State University
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