Invention Grant
US07679802B2 Optical scanner configured so a principal ray of an incident beam from a light source to a deflector and a principal ray of a scanning beam from the deflector to a scanned surface travel on opposite sides of an optical axis of optical element(s) having transmissive surfaces both concave toward the deflector in sub-scanning section, and image forming apparatus using the same
失效
光学扫描器被配置为使得从光源到偏转器的入射光束的主射线和从偏转器到扫描表面的扫描光束的主射线在具有透射表面的光学元件的光轴的相对侧上行进 在副扫描部分中朝向偏转器凹入，以及使用其的图像形成装置
- Patent Title: Optical scanner configured so a principal ray of an incident beam from a light source to a deflector and a principal ray of a scanning beam from the deflector to a scanned surface travel on opposite sides of an optical axis of optical element(s) having transmissive surfaces both concave toward the deflector in sub-scanning section, and image forming apparatus using the same
- Patent Title (中): 光学扫描器被配置为使得从光源到偏转器的入射光束的主射线和从偏转器到扫描表面的扫描光束的主射线在具有透射表面的光学元件的光轴的相对侧上行进 在副扫描部分中朝向偏转器凹入，以及使用其的图像形成装置
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Application No.: US12250478Application Date: 2008-10-13
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Publication No.: US07679802B2Publication Date: 2010-03-16
- Inventor: Hidekazu Shimomura
- Applicant: Hidekazu Shimomura
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon U.S.A., Inc. I.P. Division
- Priority: JP2004-259913 20040907
- Main IPC: G02B26/08
- IPC: G02B26/08
Abstract:
Optical scanners are configured so a principal ray of an incident beam from a light source device to a deflector and a principal ray of a scanning beam from the deflector to a scanned surface travel on the opposite sides of an optical axis of an optical element(s) wherein entrance and exit surfaces of the optical element(s) are both concave toward the deflector in the sub-scanning section. Embodiments may beneficially separate the scanning beam from ghost light and/or be incorporated in image forming apparatuses.
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