Optics: measuring and testing – Range or remote distance finding – With photodetection
Reexamination Certificate
2005-03-08
2005-03-08
Gregory, Bernarr E. (Department: 3662)
Optics: measuring and testing
Range or remote distance finding
With photodetection
C356S141100
Reexamination Certificate
active
06864965
ABSTRACT:
A single dual mode monolithic focal plane array having an active sensor and a passive sensing capability is switched from one mode to the other by switching the bias across the cells of the array from a passive IR mode to an active LADAR mode, with the monolithic dual mode focal plane array having applications in missile target seekers and laser target designators. The switching is accomplished by increasing the gain of the array by as much as 30 times that associated with IR detection when laser return pulses are expected. Thus, there need be no mechanical changes to the array to afford both passive IR sensing and an active LADAR pulse detector. Nor need there be two different focal plane arrays, one for IR and one for laser radiation, which leads to boresighted alignment problems.
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Andrea Brian
BAE Systems Information and Electronic Systems Integration Inc.
Gregory Bernarr E.
Long Daniel J.
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