, Paul [mailto:paul_oshaughne...@affymetrix.com]
Sent: 05 October, 2000 10:01 PM
To: emc-p...@majordomo.ieee.org
Cc: kathy@eng.sun.com
Subject: RE: When is an LED a Laser?
I should restate what I said earlier - LEDs are covered under IEC 825, but
the typical display LED falls so far below
I should restate what I said earlier - LEDs are covered under IEC 825, but
the typical display LED falls so far below the Maximum Permissible Exposure
levels as to be exempt (see Scope of IEC 825).
Paul O'S.
-Original Message-
From: geor...@lexmark.com [mailto:geor...@lexmark.com]
Hello Kathy,
Your design engineers may be getting classical LEDs mixed up with Laser
Diodes, which I have seen labelled as Laser LEDs.
LEDs are the red, green, yellow indicators which have become commonplace
everywhere. These put out a simple non-coherent light. I do not believe
they are
Kathy,
IEC 825-1 has been published as EN 60825-1. EN 60825-1 covers lasers and
LED's. An LED and a laser are two different devices,
so I don't think that I can tell you the circumstances under which an LED
becomes a laser. Theoretically, this would only happen if the piece of
semiconductor
IEC 825 covers emissions from LEDs and lasers. They devices use different
technologies; however, the limits apply to both LEDs and lasers.
Richard Woods
--
From: Kathy Toy [SMTP:kathy@eng.sun.com]
Sent: Thursday, October 05, 2000 1:09 PM
To:
5 matches
Mail list logo
