Microlensed focal plane array (FPA) using sub-pixel...

Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit

Reexamination Certificate

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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.

REFERENCES:
patent: 5262871 (1993-11-01), Wilder et al.
patent: 5614950 (1997-03-01), Park et al.
patent: 6593562 (2003-07-01), Parrish et al.
patent: 6660988 (2003-12-01), Lee et al.
patent: 7034874 (2006-04-01), Reinhart et al.
patent: 2004/0036788 (2004-02-01), Chapman et al.
patent: 2006/0038128 (2006-02-01), D'Souza et al.
Motamedi, M.E., et al, “FPAs and Thin Film Binary Optic Microlens Integration,” Miniaturized Systems with Micro-Optics and Micromechnics, SPIE, vol. 2687, Jan. 30-31, 1996, p. 70.
Arias, J.M., et al, “Planar p-on-n HgCdTe heterostructure photovoltaic detectors,” Appl. Phys. Lett. 62(9), Mar. 1, 1993, pp. 976-978.
Sankur, H.O. & Motamedi, M.E., “Microoptics development in the past decade,” Micromachining Technology fofr Micro-Optics, Proceedings of SPIE, vol. 4179 (2000), pp. 30-35.
Motamedi, et al. “FPA's and Thin Film Binary Optic Microlens Integration”, Miniaturized Systems with Micro-Optics and Micromechanics, vol. 2687, Jan. 1996, p. 70.
J. Arias et al., “Planar p-on-n HgCdTe Heterostructure Photovoltaic Detectors”, Appl. Phys. Lett. 62 (9), Mar. 1, 1993, pp. 976-978.
H.O. Sankur et al., “Microoptics Development in the Past Decade”, Micromachining Technology for Micro-Optics, Proceedings of SPIE vol. 4179 (2000), pp. 30-35.

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