Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1997-09-24
1999-03-02
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
348135, 356 504, G01C 308, H04N 718
Patent
active
058778519
ABSTRACT:
A laser transmitter is amplitude modulated with a chirp signal to illumin an entire scene or field of view. A mixing process occurs in the received light path using an electro-optic light modulator positioned just in front of the focal plane detector array. The detector array detects and integrates the mixed light signal over some field of view. Numerous image frames are recorded periodically in the time over the FM period. The Fourier transform taken over time for a pixel establishes the range to the target in that pixel. Performing the Fourier transform for all pixels yields a three-dimensional image of objects in the field of view. Such an arrangement yields a scannerless ladar possessing high range resolution with no range ambiguities.
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Ruff William C.
Stann Barry
Sztankay Zoltan G.
Buczinski Stephen C.
Clohan Paul S.
Dynda Frank J.
The United States of America as represented by the Secretary of
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