Infrared detector with vibrating chopper

Details Infrared detector with vibrating chopper Infrared detector with vibrating chopper

1982-08-12

1984-11-27

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250342, 250351, G01J 508

Patent

active

044853050

ABSTRACT:
An infrared ray detector comprising an infrared ray detecting body, a pair of opposing portions, a bimorph vibrator connected to the pair of opposing portions for intermitting infrared rays incident upon the detector, and a housing containing these elements, the housing being provided with an opening for incidence of infrared rays. The pair of opposing portions comprise infrared ray transmitting portions and infrared ray non-transmitting portions. The infrared ray transmitting portions in one of opposing portions is periodically overlapped by the bimorph vibrator with the infrared ray transmitting portions or infrared ray non-transmitting portions in the other opposing portion, so that incident infrared rays are intermitted.

REFERENCES:
patent: 3175092 (1965-03-01), Leftwich
patent: 3925668 (1975-12-01), Anderson et al.
Gary Frodsham, "Operation of Tuned Fork Light Choppers at Liquid Helium Temperatures", Rev. Sci. Instrum., vol. 46, No. 3, (Mar. 1975), pp. 312-316.

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