Infrared detection system

Details Infrared detection system Infrared detection system

1978-09-15

1980-09-30

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250349, G01J 100

Patent

active

042257867

ABSTRACT:
An infrared radiation intruder detection system is disclosed which employs a unique pyroelectric detector array. The array comprises a pyroelectric plastic film having electrodes arranged on opposing surfaces to define a plurality of heat-sensitive capacitors connected in parallel. According to a preferred embodiment, the film of selected detector elements is poled to a polarity opposite that of the other elements to cause internal cancellation of signals due to events which affect an even number of detectors simultaneously.

REFERENCES:
patent: Re29082 (1976-12-01), Schwartz
patent: 3480777 (1969-11-01), Astheimer
patent: 3839640 (1974-10-01), Rossin
patent: 3999069 (1976-12-01), Taylor et al.

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