Title:
Optical scanning device and image forming device using it
Document Type and Number:
Japanese Patent JP6319207
Kind Code:
B2
Abstract:
A light scanning device (23) includes a polygon mirror (4), a first incidence optical system (5Y), a second incidence optical system (5C), a first scanning lens (6Y), and a second scanning lens (6C). The polygon mirror (4) includes a deflection surface (41) being adapted to ensure entering of the first light beam and the second light beam at an identical timing. Assuming that, at a time point, at which the light beam reflected at the deflection surface (41) passes through a position on an optical axis of a scanning lens (6Y, 6C) in plan view of the polygon mirror (41) along an axial direction of the rotation shaft (40), a reflection point of a light beam on the deflection surface (41) is a reference point (P), the second scanning lens (6C) is arranged at different positions in a main-scanning direction and in an optical axis direction with respect to the first scanning lens (6Y), such that a circle locus (A1) is along an offset curved line (A2). The circle locus (A1) is a locus of a point corresponding to the reference point (P) by the rotation of the polygon mirror (4).
Inventors:
Yuasa
Application Number:
JP2015131152A
Publication Date:
May 09, 2018
Filing Date:
June 30, 2015
Export Citation:
Assignee:
Kyocera Document Solutions Co., Ltd.
International Classes:
G02B26/10; B41J2/47; G02B26/12; H04N1/113
Domestic Patent References:
| JP2008122706A | ||||
| JP2006301205A | ||||
| JP2006330581A | ||||
| JP2001133711A | ||||
| JP2007240863A | ||||
| JP2005241683A | ||||
| JP2004280056A | ||||
| JP2006215483A | ||||
| JP2010134434A |
Foreign References:
| US20040036760 |
Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Haruhiro Hirata
Masataka Otani
Haruhiro Hirata