Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1993-03-31
1996-03-26
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
2502222, H01J 314
Patent
active
055023002
ABSTRACT:
A focal plane array (10) of radiation detectors (10b) has all features inclined with respect to an illuminating beam of radiation. That is, all features that would be orthogonally disposed with respect to an incoming wavefront are instead inclined to the incoming wavefront, an arrangement referred to as compound tipping. The disclosed embodiments of the invention create a compound tipping of the focal plane array such that there are no features of the array, such as mesa edges and sidewalls, that lie in the plane of the incoming wavefront. As a result, only a small amount of scattered light is observed, and the optical signature is significantly reduced. The invention substantially eliminates the optical signature by simultaneously tipping the focal plane features (optically and/or mechanically) in both major array axes, without degrading the imaging performance of the detective assembly.
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patent: 5124546 (1992-06-01), Hu
patent: 5204520 (1993-04-01), Green
"Coherent Laser Beam Addition: An Application of Binary-Optics Technology" by J. R. Leger et al., The Lincoln Laboratory Journal, vol. 1, No. 2, 1988 pp. 225-245.
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Granneman Russell D.
McKeag William O.
Denson-Low W. K.
Nelms David C.
Santa Barbara Research Center
Schubert W. C.
Shami K.
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