Rotation and differential angle optical sensor with integral...

Optics: measuring and testing – Angle measuring or angular axial alignment

Reexamination Certificate

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C356S139000

Reexamination Certificate

active

08077301

ABSTRACT:
A sensor may simultaneously sense the angular position of a first rotatable member relative to a frame of reference and the angular position of a second rotatable member relative to the first rotatable member. The sensor may include a first and a second disk, each of which have an annular pattern which alternates between two different levels of optical transparency. The first disk may be coupled to the first rotatable member; and the second disk may be coupled to the second rotatable member. The first and the second disks may each have an integral annular race configured to support ball bearings.

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PCT Application No. PCT/US2010/055140 (corresponds to WO 2011/066066 A2), filed Nov. 2, 2010, entitled “Rotation and Differential Angle Optical Sensors,” International Search Report and Written Opinion of the International Searching Authority, dated Jun. 16, 2011.
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