发明授权
- 专利标题: Laser scanning optical system and image forming apparatus
- 专利标题(中): 激光扫描光学系统和成像设备
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申请号: US11563220申请日: 2006-11-27
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公开(公告)号: US07755809B2公开(公告)日: 2010-07-13
- 发明人: Hirokazu Fujita , Kenzo Ohkubo , Takasumi Wada , Yasuhiro Ono , Takayuki Ohno
- 申请人: Hirokazu Fujita , Kenzo Ohkubo , Takasumi Wada , Yasuhiro Ono , Takayuki Ohno
- 申请人地址: JP Osaka
- 专利权人: Sharp Kabushiki Kaisha
- 当前专利权人: Sharp Kabushiki Kaisha
- 当前专利权人地址: JP Osaka
- 代理机构: Renner, Otto, Boisselle & Sklar, LLP
- 优先权: JP2005-372887 20051226
- 主分类号: H04N1/04
- IPC分类号: H04N1/04
摘要:
A laser scanning optical system converts a plurality of beams emitted from the laser diode (LD) into parallel light using a collimator lens, shapes the parallel light using an aperture, and executes exposure of a plurality of lines simultaneously on a photoreceptor drum. To cause a necessary emitting point interval d determined uniquely from the magnification of the optical system to coincide with an emitting point interval of the LD used, the LD is rotated by an angle θ against the main optical axis plane thereof. In this case, a converting device that converts the aspect ratio of a profile of the light beam emitted from the LD is provided. A conversion characteristic of the converting device is adjusted such that the characteristic is matched with a condition within a predetermined region following a characteristic of the optical system.