Rotationally independent optical correlation for position...

Details Rotationally independent optical correlation for position... Rotationally independent optical correlation for position...

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G02B 5/18 (2006.01) G01B 11/00 (2006.01) G01B 11/26 (2006.01) G02B 27/44 (2006.01) G02B 27/46 (2006.01) G03H 1/16 (2006.01) G11B 7/00 (2006.01) G11B 11/12 (2006.01)

Patent

CA 1095295

ROTATIONALLY INDEPENDENT OPTICAL CORRELATION FOR POSITION DETERMINATION Abstract of the Disclosure Coherent optical correlation is applied to an article having circular features as well as noncircular features. A spatial filter is constructed for a typical part with the noncircular features masked out. The filter is placed in the transform plane of the optical correlation system so that the system will produce correlation signals indicating the presence, the coordinate position and angular orientation of the part within the field of view of the system.

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