Detector cold shield

Details Detector cold shield Detector cold shield

1981-07-01

1984-05-01

Howell, Janice A.

Radiant energy

Infrared-to-visible imaging

Including means for scanning field of view

250349, 250352, H01J 3149, G01J 100

Patent

active

044463723

ABSTRACT:
A shield for limiting the radiation received by electromagnetic energy radiation detectors to the radiation provided to the detectors by the optics of an electromagnetic energy detection system. The shield comprises a member transparent to a predetermined spectrum of radiation. An opaque thin film is deposited on a surface of the member, the thin film having apertures defined therein, the detectors viewing the optics through the member and the apertures. The thin film shields the detectors from electromagnetic radiation generated outside the field of view of the optics, thereby improving the sensitivity of the detection system. Virtually any desired thickness for the member may be used, thus allowing very close placement of the shield to the detectors and permitting use of very high density arrays.

REFERENCES:
patent: 3929398 (1975-12-01), Bates
patent: 3963926 (1976-06-01), Borrello
patent: 4039833 (1977-08-01), Thom
patent: 4078243 (1978-03-01), De Bar et al.
patent: 4253022 (1981-02-01), Allen et al.
William J. White Application for Etchable Glass Cold Shield for Background Limited Detectors, Serial No. 248,127 filed 3/27/81.

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