Title:
光学式エンコーダ
Document Type and Number:
Japanese Patent JP4520121
Kind Code:
B2
Abstract:
An optical encoder comprising a light-receiving part having photodiodes equal in number to the common multiplier of a number of slits facing the light-receiving part and a number of movement information signals. Output terminals of the photodiodes are connected so that the movement information signals are respectively obtained by adding output signals of the plurality of photodiodes out of the photodiodes equal in number to the common multiplier. The twelve photodiodes are balancedly arranged corresponding to three slits and a light-receiving area of each photodiode is made smaller by subdiving each photodiode. The optical encoder suppress difference, distortion and variance of the movement information signals or the like obtained from the light-receiving part with the result that accurate movement information is obtained.
Inventors:
Okada Norikazu
Hirohisa Warita
Nakamura Hiroki
Kazufumi Oki
Hirohisa Warita
Nakamura Hiroki
Kazufumi Oki
Application Number:
JP2003289817A
Publication Date:
August 04, 2010
Filing Date:
August 08, 2003
Export Citation:
Assignee:
Sharp Corporation
International Classes:
G01D5/36; G01D5/34; G01D5/347
Domestic Patent References:
| JP61292016A | ||||
| JP571990A | ||||
| JP10132614A |
Attorney, Agent or Firm:
Hiroshi Yamazaki
Mitsuo Tanaka
Yukinori Nakakura
Mitsuo Tanaka
Yukinori Nakakura