Title:
光学式エンコーダ
Document Type and Number:
Japanese Patent JP4208483
Kind Code:
B2
Abstract:
A divergent light beam from a light source unit having a plurality of light-emitting regions is almost contained within the surface of a reflecting body that is an array of micro roof mirrors/roof prisms disposed in a regular manner. The light beam emitted from the light source unit with an angle of divergence is reflected by the reflecting body and is almost converged on a light-receiving surface. As a result, there is increased the ray density of a light beam on the light-receiving surface.
Inventors:
Masahiko Igaki
Atsuta Akio
Atsuta Akio
Application Number:
JP2002145920A
Publication Date:
January 14, 2009
Filing Date:
May 21, 2002
Export Citation:
Assignee:
Canon Inc
International Classes:
G01B11/00; G01D5/347; G01D5/38; G02B3/06; G02B3/08; G02B5/08; G02B5/10; G02B5/124; G02B7/08
Domestic Patent References:
| JP2002005694A | ||||
| JP6347291A | ||||
| JP11287671A | ||||
| JP8233608A | ||||
| JP49012866A | ||||
| JP2000018972A |
Attorney, Agent or Firm:
Yasuhiko Hibiya
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