Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2006-02-02
2009-02-17
Luu, Thanh X (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C348S246000
Reexamination Certificate
active
07491920
ABSTRACT:
A cost-effective FPA includes a plurality of detectors per pixel, wherein radiation is directed by a microlens array into respective focal regions that are covered by the union of the detectors' collections regions within each pixel and any defective detectors are de-selected in the ROIC. The operability of each pixel is evaluated, and a map generated specifying detector de-selection for each pixel. This map is read into memory in the ROIC to de-select bad detectors. Bad detectors are preferably allowed to float to a photovoltage and re-emit some of their accumulated photo charge to neighboring detectors to improve collection efficiency. The radiation levels are preferably read out on a pixel-by-pixel basis. Accordingly, the signals from the selected detectors are combined within each pixel.
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Lee Donald L.
Tennant William E.
Koppel, Patrick, Heybl & Dawson
Luu Thanh X
Teledyne Scientific & Imaging, LLC
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