Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1992-12-29
1995-04-25
McGraw, Vincent P.
Optics: measuring and testing
By polarized light examination
With light attenuation
G01B 1124
Patent
active
054104106
ABSTRACT:
A sensor unit of an optical probe includes an illuminating device having an illuminating point arranged on the central portion of a detective surface facing a to-be-measured object, and eight light receiving devices arranged on the x and y axes in the detective surface, for receiving a reflected light from the object, four light receiving points among those of the eight light receiving devices being symmetrically arranged on the x axis with respect to the illuminating point and the remaining four light receiving points thereof being symmetrically arranged on the y axis with respect to the illuminating point. The rotation angle .theta. of the unit normal vector around the x axis and the rotation angle .phi. thereof around the y axis in the detective surface are calculated by processing the amounts of light received by the eight light receiving devices of the sensor unit.
REFERENCES:
patent: 3871771 (1975-03-01), Scott
patent: 4459022 (1984-07-01), Morey
Bukow, Hans. Fiber Optic Distance Sensor for Robotic Applications SME 1986 Technical Papers, pp. MS86-938-1 thru MS86-938-9.
Aoyama Hideki
Yamazaki Kazuo
McGraw Vincent P.
Mitutoyo Corporation
Wolfe Russell C.
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