Title:
OPTICAL SCANNER AND OPTICAL PATTERN READER
Document Type and Number:
Japanese Patent JP2012242685
Kind Code:
A
Abstract:
To suppress deviation between a scan object and a position of a beam waist regardless of an increase in scan angle.
An optical scanner includes a light source for outputting a laser beam and scan means for reflecting the laser beam from the light source to make the laser beam periodically scan. The scan means includes a mirror portion reflecting the laser beam and driving means which changes a curvature of the mirror portion with a half of a scan period so that the beam waist position of the laser beam moves on a virtual plane during one scan.
Inventors:
SUZUKI SHIGEMI
WAKABAYASHI TAKAYUKI
ARAI KATSUMI
WAKABAYASHI TAKAYUKI
ARAI KATSUMI
Application Number:
JP2011114092A
Publication Date:
December 10, 2012
Filing Date:
May 20, 2011
Export Citation:
Assignee:
CANON DENSHI KK
International Classes:
G02B26/10; G02B26/08; H04N1/113
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
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