Re: [ATM] Infrared Scope Design II

["Vladimir Galogaza" <vladimir.galogaza1@zg.t-com.hr>]

Dominic,

There is another type of IR sensor,  used in motion
detecting devices like those for front door lights or surveillance. 
Sensors are piroelectric devices (PIR). They are inherently AC because 
there is output only if there is change in input radiation intensity.
Output is proportional to first derivative of the input signal.
Some simple references are here:
http://www.glolab.com/pirparts/pirparts.html

http://www.glolab.com/pirparts/pirmanual.PDF

but there must be plenty at all levels from popular to scientific.

Modern IR spectrophotometers  almost exclusively use PIR detectors,
(single though, not imaging arrays)
Depending on wavelength range they are available with different
windows like KBr or CsI and different prices accordingly.

Regards
Vladimir.


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