Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1981-07-29
1984-03-13
Smith, Alfred E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250342, G01J 510
Patent
active
044370032
ABSTRACT:
A dual pyroelectric crystal sensor, connected electrically in series opposition to provide ambient temperature compensation, drives a single ended amplifier. The load resistor for the sensor is a center tapped high megohm resistor with the center tap connected to the common electrode connections between the dual crystals to bleed off static charges that build up on the sensor due to the very high impedance of the crystal material.
REFERENCES:
patent: 4336452 (1982-06-01), Baker
patent: 4367408 (1983-01-01), Imai et al.
ELTEC Instruments, Inc.
Fields Carolyn E.
Smith Alfred E.
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