G - Physics – 01 – S
Patent
G - Physics
01
S
343/7, 350/3.1
G01S 17/87 (2006.01) G01B 9/02 (2006.01) G01S 7/481 (2006.01) G01S 7/499 (2006.01) G01S 17/06 (2006.01) G01S 17/89 (2006.01) G02F 2/00 (2006.01) H04N 13/02 (2006.01)
Patent
CA 1330366
37 3-DIMENSIONAL VISION SYSTEM UTILIZING COHERENT OPTICAL DETECTION Abstract of the Disclosure A three-dimensional optical scanning vision system capable of producing high-resolution images in real-time includes an optical source (100) for pro- ducing a source light beam. The source light beam is directed to a beam splitter (104) which splits it into a local oscillator beam and a signal beam. The local oscillator beam is directed toward a photo- detector (106), while the signal light beam is directed toward a target (112). Light reflected from the tar- get (112) is received by the beam splitter (104) and directed toward a retroreflector (118) which returns the beam to the beam splitter (104) interface. Quarter wave plates (110,116) and the retroreflector (118) insure that the return light beam and the local oscil- lator beam are collimated and have the same polariza- tion state. Mixing the local oscillator beam and the return light beam occurs at the beam splitter (104) interface, thus providing coherent optical detection by the photodetector (106). The photodetector thus provides an output signal providing a high degree of information about the target. The system also includes scanner optics (2) to scan the signal light beam across the target. A processor (20) is also included for outputting a three-dimensional image of the target, and for controlling the scanner optics (2).
561718
Goodwin Frank Eugene
Simonson Dana
Digital Optronics Corporation
Goudreau Gage Dubuc
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