Re: [ATM] IR pyroelectric detetors

[Michael Lindner <mikell@optonline.net>]

Mark Holm wrote:
> Since the infrared emissivity of mirror coatings is low, and
> reflectivity high, I wonder if this idea doesn't end up measuring the
> temperature of the surroundings reflected in the mirror rather more than
> the temperature of the mirror?

You are correct sir. I've only measured with an unaluminized mirror to 
check fan effectiveness, rather than measuring under actual observing 
conditions. Even so, you have to hold the device very close to the glass 
and straight on, or you do pick up some reflections.

-- 
Michael Lindner
http://www.starastronomy.org *** http://home.att.net/~mikel
http://www.atmsite.org *** http://www.atmlist.net
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