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    • 8. 发明授权
    • Laser scanning optical system and image forming apparatus
    • 激光扫描光学系统和成像设备
    • US07755809B2
    • 2010-07-13
    • US11563220
    • 2006-11-27
    • Hirokazu FujitaKenzo OhkuboTakasumi WadaYasuhiro OnoTakayuki Ohno
    • Hirokazu FujitaKenzo OhkuboTakasumi WadaYasuhiro OnoTakayuki Ohno
    • H04N1/04
    • G02B26/125G02B19/0014G02B19/0052G02B27/0911
    • 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.
    • 激光扫描光学系统使用准直透镜将从激光二极管(LD)发射的多个光束转换为平行光,并使用光圈对平行光进行成形,并且在感光鼓上同时执行多条线的曝光。 为了使从光学系统的放大率唯一确定的必要的发射点间隔d与所使用的LD的发射点间隔一致,LD旋转角度& 抵靠其主光轴平面。 在这种情况下,提供转换装置,其转换从LD发射的光束的轮廓的纵横比。 调整转换装置的转换特性,使得该特性与遵循光学系统的特性的预定区域内的条件相匹配。