Dual pyroelectric sensor

Details Dual pyroelectric sensor Dual pyroelectric sensor

1995-03-15

1996-11-12

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

In an ignitor or detonator

2503383, G01J 534

Patent

active

055743757

ABSTRACT:
A dual-type pyroelectric elements. The first pyroelectric element is constituted by a larger electrode on a first surface and a smaller electrode on a second surface, respectively of a pyroelectric sheet. The second pyroelectric element is on the other hand constituted by a smaller electrode on the first surface and a larger electrode on the second surface respectively of the pyroelectric sheet. Further, takeout electrodes are taken out respectively integrally from the smaller electrodes on both surfaces of the pyroelectric sheet in mutually opposite directions. As a result, even if electrodes patterns on both surfaces of the pyroelectric sheet expected to be formed in alignment with each other are actually deviated positionally, the resultant pairs of pyroelectric elements are allowed to retain substantially identical effective light-receiving areas inclusive of those given by takeout electrodes, thus providing a dual pyroelectric sensor which is excellent in performance of canceling common-mode noises caused by a vibration, temperature change or background radiation.

REFERENCES:
patent: 3839640 (1974-10-01), Rossin
patent: 4983838 (1991-01-01), Nagai et al.

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