Optics: measuring and testing – Position or displacement – Position transverse to viewing axis
Reexamination Certificate
2011-03-08
2011-03-08
Punnoose, Roy (Department: 2886)
Optics: measuring and testing
Position or displacement
Position transverse to viewing axis
C356S614000
Reexamination Certificate
active
07903263
ABSTRACT:
A position detection sensor is provided and includes: a scale including a self-emitting part that emits light to form a pattern on the scale; and a relative movable part provided in such a manner to be opposed to the scale and to be movable relative to the scale, the relative movable part including a light receiving part that detects the light emitted at a position in a portion of the scale where the pattern is formed, the position corresponding to a current position of an object to be measured. At least one of a traveling amount, traveling speed and absolute position of the object is detected based on a detection signal outputted from the light receiving part.
REFERENCES:
patent: 5260568 (1993-11-01), Ieki
patent: 2006/0267822 (2006-11-01), Ito
patent: 2002-48599 (2002-02-01), None
patent: 2005-24276 (2005-01-01), None
Birch & Stewart Kolasch & Birch, LLP
Fujinon Corporation
Punnoose Roy
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