U.S. Philips Corporation

Raymond F Hall

Andrew A Turnbull

Colin D Overall

A bolometric detector comprising an optical immersion lens and a pyroelectric detector element mounted so as to be spaced from the lens. The detector may be mounted spaced from the lens by an air gap, by a foraminous spacer, or by a cement having a low thermal conductivity.

Bolometric detector

In order to reduce microphony due to the piezoelectric nature of a pyroelectric element (9) in a pyroelectric detector, the detector comprises one or more flexible films resiliently supporting the element (9) and two electrical connections thereto each comprising an electrically conductive layer (6,8) on the film(s). There are suitably two films with the element (9) therebetween. The films are secured to one another around the element (9) by an adhesive, thereby urging the films against the element (9) to hold it in position and maintain the electrical connections.

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Crawley, United Kingdom

Raymond F Hall