Multi-color, multi-focal plane optical detector

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

Reexamination Certificate

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C257S440000, C257S021000

Reexamination Certificate

active

06875975

ABSTRACT:
A semiconductor-based, photo detector device capable of simultaneously detecting two or more selected wavelengths of light on a pixel-registered basis. The device has detector layers of selected semiconductor materials of one micron or less in thickness interspersed with contact layers, each detector layer having a different light absorption to wavelength response curve. All contact layers, including detector bias voltages, have electrical contacts on the backside of the pixel for discrete pixel connection to mating connections on a suitable ROIC substrate. Among its several embodiments, there is a multi-color detector array and a single channel per pixel differential optical signal detector.

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