Title:
光学式エンコーダ
Document Type and Number:
Japanese Patent JP4498024
Kind Code:
B2
Abstract:
An optical encoder includes a light-emitting unit, a scale with a discontinuous part, and a plurality of light-receiving elements arranged in relationship to a pitch of the scale. In the optical encoder, a light beam from the light-emitting unit reflects off the scale, and is received at the light-receiving elements. As a result of the processing of signals from the light-receiving elements, the discontinuous part is detected and the origin detection can be achieved.
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Inventors:
Atsuta Akio
Masahiko Igaki
Masahiko Igaki
Application Number:
JP2004177407A
Publication Date:
July 07, 2010
Filing Date:
June 15, 2004
Export Citation:
Assignee:
Canon Inc
International Classes:
G01D5/36; H01J3/14
Domestic Patent References:
| JP2003337052A | ||||
| JP2001317963A | ||||
| JP10288538A |
Attorney, Agent or Firm:
Yuichi Uchio