Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!apple!netcom!teda!dll
From: dll@teda.UUCP (Dan Liddell)
Newsgroups: sci.electronics
Subject: Re: Lasers
Message-ID: <16540@teda.UUCP>
Date: 9 Nov 90 15:31:12 GMT
References: <1571@beguine.UUCP>
Organization: Teradyne EDA, Inc.
Lines: 16

In article <1571@beguine.UUCP> Jeff.Miller@samba.acs.unc.edu (Jeff Miller) writes:
>For casual classroom pointing something of less power would likely be in 
> order, there are in fact regulations for such things. 

For "casual" use lasers (classroom, grocery store scanners) it looks
like the limit is 1 milliwatt (this from reading the warnings on ads
for various devices). The warning on lasers of less than a milliwatt
is "Don't stare stupidly into this bright light". Anything above that
carries a warning of that indicates that it should not be pointed into
people's eyes at all.

This is for helium-neon reddish lasers. I don't know if laser damage to
the human eye is strongly correlated to frequency.
-- 
Dan Liddell    UUCP decwrl!teda!dll       TELEPHONE 4089805200 USA
curb your dogma.       The opinions and views expressed are Dan's.