From: John Woodgate
Subject: Re: Anyone Need A Laser Power Meter?
Date: Tue, 8 Oct 2002 11:55:57 +0100
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Tue, 8 Oct 2002 12:46:44 +0000 (UTC)
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I read in sci.electronics.design that email@example.com wrote (in
) about 'Anyone Need A Laser
Power Meter?', on Tue, 8 Oct 2002:
>Ed Edmondson wrote:
>> I need a power and wavelength meter to use with my laser collection. However,
>> am not an engineer, just a technical person. I am thinking that there might be
>> some people on this list that have the ability to design this type of
>> instrument? I do have the ability to obtain the necessary components which
>You don't need a wavelength meter.
>Take a steel rule, with mm graduations.
>Now, shine the laser along it so the beam touches many graduations.
>The rule acts as a diffraction grating.
>The first fringe will be where the path difference is one wavelength
>Simply search on http://www.google.com/ for
>"steel rule" diffraction wavelength
With a stop-watch, you can estimate the power as well. Just time how
long it takes for the ruler to melt.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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