From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: Anyone Need A Laser Power Meter?
References: <email@example.com> <3DA2D172.F3230CD4@webaccess.net>
Date: Tue, 08 Oct 2002 15:00:19 GMT
NNTP-Posting-Date: Tue, 08 Oct 2002 08:00:19 PDT
Charles DH Williams wrote:
> In article <3DA2D172.F3230CD4@webaccess.net>, Chuck Simmons
> > The power meter is simple enough. Either a silicon solar cell or a large
> > area photodiode will do fine.
> You must have some extremely low power lasers in mind.
> The way real laser power meters normally work is to use a so-called D.C.
> subtitution bridge and a carefully designed detector head that won't melt,
> catch fire, or cause dangerous reflections.
> Then, of course, they need to be certified as complying with safety
> standards (IEC60825 from memory) ...
There is a large market for the lower than 1 watt range in laser power
meters. These are used in servicing consumer products that contain
lasers which are usually 1mw or below. I have a handy battery bowered
one on my bench at work. Edmund Industrial Optics sells several power
meters for the low power range needed for checking scanners in stores
and consumer products. One sells for under $300. I suspect that the vast
majority of laser power meters in use are for less than 1 watt lasers.
This is because the vast majority of lasers sold are in the less than 1
watt range (think in terms of a conservative estimate of more than
10,000,000 lasers sold per year).
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons firstname.lastname@example.org