Optical rotational position information detecting apparatus

Details Optical rotational position information detecting apparatus Optical rotational position information detecting apparatus

2007-04-10

2007-04-10

Garcia, Gabriel I. (Department: 2625)

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

C356S027000

Reexamination Certificate

active

10915347

ABSTRACT:
An apparatus for optically detecting rotational position information of a rotating object, includes a light source, a detector which is located at a position to receive scattered light from the rotating object when the rotating object is irradiated with a light beam from the light source, and outputs a frequency signal based on the scattered light, a signal processing system for detecting rotational position information by performing signal processing for the frequency signal from the detector, and a rotation control system for controlling rotation of the rotating object. The rotation control system preliminarily rotates the rotating object in detecting the rotational position information.

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