Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1990-09-28
1992-05-19
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
2502062, 356 45, 356152, 356351, G01C 308, G01C 100, G01B 1126
Patent
active
051142260
ABSTRACT:
A three-dimensional optical scanning vision system capable of producing high-resolution images in real-time includes an optical source for producing a source light beam. The source light beam is directed to a beam splitter which splits it into a local oscillator beam and a signal beam. The local oscillator beam is directed toward a photodetector, while the signal light beam is directed toward a target. Light reflected from the target is received by the beam splitter and directed toward a retroreflector which returns the beam to the beam splitter interface. Quarter wave plates and the retroreflector insure that the return light beam and the local oscillator beam are collimated and have the same polarization state. Mixing of the local oscillator beam and the return light beam occurs at the beam splitter interface, thus providing coherent optical detection by the photodetector. The photodetector thus provides an output signal providing a high degree of information about the target. The system also includes scanner optics to scan the signal light beam across the target. A processor is also included for outputting a three-dimensional image of the target, and for controlling the scanner optics.
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Goodwin Frank E.
Simonson Dana
Buczinski Stephen C.
Digital Optronics Corporation
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