Title:
SCANNING OPTICAL SYSTEM AND IMAGE FORMING APPARATUS USING IT
Document Type and Number:
Japanese Patent JP3870111
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a scanning optical system by which excellent optical performance is obtained by appropriately setting the array direction of a fine structural grating in accordance with the polarization plane of an incident luminous flux and reducing the influence of the structural double refraction of a fine grating structure and an image forming apparatus using it.
SOLUTION: In the scanning optical system by which a surface to be scanned 7 is scanned by deflecting a luminous flux emitted by a laser light source 1 by a deflecting means 5 and performing image formation on the surface to be scanned 7 with the luminous flux deflected by the deflecting means by a scanning optical means 6, the scanning optical means possesses one or more optical surfaces having the fine structural grating 8, and the grating pitch of the fine structural grating is shorter than the wavelength of the luminous flux from the laser light source and the fine structural gratings are arrayed in parallel over an entire fine structural grating surface.
Inventors:
Kazumi Kimura
Application Number:
JP2002068141A
Publication Date:
January 17, 2007
Filing Date:
March 13, 2002
Export Citation:
Assignee:
Canon Inc
International Classes:
B41J2/44; G02B26/10; G02B13/00; G02B13/18; G02B26/12; H04N1/036; H04N1/113; (IPC1-7): G02B26/10; B41J2/44; G02B13/00; G02B13/18; H04N1/036; H04N1/113
Domestic Patent References:
| JP5303049A | ||||
| JP9500459A | ||||
| JP58174906A | ||||
| JP2000137109A | ||||
| JP11109103A | ||||
| JP2000275415A |
Attorney, Agent or Firm:
Yukio Takanashi
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