Radiant energy – Infrared-to-visible imaging – Including detector array
Reexamination Certificate
2005-04-26
2005-04-26
Porta, David (Department: 2878)
Radiant energy
Infrared-to-visible imaging
Including detector array
C250S330000
Reexamination Certificate
active
06885002
ABSTRACT:
A unit cell (10) of a readout integrated circuit is constructed and operated so as to temporally align an image obtained in a first spectral band with a an image obtained in a second spectral band. A method operates, during a frame period, to sub-frame average a first signal detected in the first spectral band by a multi-spectral detector (12), to sub-frame average a first signal detected in the second spectral band by the multi-spectral detector, and to sub-frame average a second signal detected in the first spectral band by the multi-spectral detector. The method then reads out the sub-frame averaged signals for each spectral band. The sub-frame averaged may be read out simultaneously from the unit cell. When sub-frame averaging the first and second signals in the first spectral band the method performs a plurality of consecutive sub-integrations and stores the result of each sub-integration on a first sub-frame averaging capacitance, and when sub-frame averaging the first signal of the second spectral band the method performs a single integration of the second signal, and stores the result of the integration on a second sub-frame averaging capacitance. The first spectral band may correspond to long wavelength infrared radiation (LWIR), and the second spectral band may correspond to medium wavelength infrared radiation (MWIR).
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Black Stephen H.
Finch James A.
Graham Roger W.
Wilson Jerry A.
Wyles Richard H.
Porta David
Raytheon Company
Schubert William C.
Sung Christine
Vick Karl A.
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