Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1992-10-22
1994-08-30
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
348 31, 348 81, 348144, G01C 308, H04N 718
Patent
active
053432843
ABSTRACT:
An imaging lidar system is presented which is adapted to decrease the backscattering at the receiver when a target is viewed in reflection and to increase the backscattered reflection when the target is viewed in obscuration by operating the airborne lidar imaging system bistatically in the former case, and monostatically in the latter case. In accordance with a first embodiment of the present invention, a retractible prism and remote reflecting mirror are used to direct the laser transmitter beam downward. The reflecting mirror is offset so that there is a finite angle between the transmitter optical path and the path of the light reflected back into the CCD framing camera. The angle can be varied by moving the reflecting mirror along a track or rail with the appropriate adjustment to the mirror so that the transmitter beam is completely captured and directed downward to illuminate the area viewed by the camera. In a second embodiment of the present invention, the camera is placed on runners and displaced from the transmitter beam. A control is inserted so that the transmitter optics are directed to the area imaged by the camera.
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"Blue-Green High-Powered Light Extends Under Water Visibility", Kornstein et al, Electronics, Oct. 14, 1968, pp. 140-149.
Keeler R. Norris
Ulich Bobby L.
Buczinski Stephen C.
Kaman Aerospace Corporation
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