Differential pyroelectric detector

Details Differential pyroelectric detector Differential pyroelectric detector

1981-01-23

1983-05-17

Anderson, Bruce C.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250338, G01J 100

Patent

active

043842070

ABSTRACT:
A pyroelectric detector comprising a body of pyroelectric material having a front surface for receiving radiation, a rear surface, a relatively thin coating of radiation absorbing and transmitting and electrically conducting material applied to the entire front surface, and a pair of relatively thicker areas of radiation reflecting and electrically conducting material applied to the rear surface in spaced-apart relation. Two heat sensitive charge generators are defined in the two regions of the pyroelectric body between the coating on the front surface and the two areas on the rear surface, and output electrical leads are attached to the two areas on the rear surface. When radiation is absorbed by either of the heat sensitive charge generators, an electrical current flows in a circuit connected to the output leads thereby providing an indication of the radiation.

REFERENCES:
patent: 3816750 (1974-06-01), Liu
patent: 3839640 (1974-10-01), Rossin
patent: 3896311 (1975-07-01), Taylor et al.
patent: 4072864 (1978-02-01), Von Gutfeld
patent: 4225786 (1980-09-01), Perlman

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