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1. 发明公开

EP3156849A1 EXPOSURE UNIT, EXPOSURE MECHANISM, AND IMAGE FORMATION DEVICE 有权
标题翻译： BELICHTUNGSEINHEIT，BELICHTUNGSMECHANISMUS UND BILDERZEUGUNGSVORRICHTUNG
公开(公告)号：EP3156849A1
公开(公告)日：2017-04-19
申请号：EP16190928.8
申请日：2016-09-27
申请人： Ricoh Company, Ltd.
发明人： FUNAMOTO, Noriaki , SATO, Yuki , XU, Chong , XIONG, Weiliang , TONG, Zhao , QU, Zhongqiu
IPC分类号： G03G15/043 , G03G15/04
CPC分类号： G03G15/0435 , G03G15/0409
摘要： Disclosed is an exposer unit comprising a laser beam emitter for emitting a laser beam corresponding to an exposure signal; a rotation polygon mirror part including a rotation polygon mirror for receiving and deviating the laser beam; an f-theta lens for receiving the deviated laser beam and generating a focused beam for emission; and plural reflectors disposed on a predetermined optical path whose start point is the f-theta lens and whose end point is a surface of a photoconductor drum in an image formation unit, and sequentially arranged according to predetermined separation distances for receiving the focused beam and reflecting the focused beam plural times along the predetermined optical path so as to cause the focused beam to arrive at the surface of the photoconductor drum. The plural reflectors include a forefront reflector and an end reflector, the forefront reflector being used for receiving the focused beam, the end reflector being used for reflecting the focused beam to the surface of the photoconductor drum. The distance from the end reflector to the surface of the photoconductor drum is less than both the predetermined separation distances and the distance from the forefront reflector to the rotation polygon mirror.
摘要翻译：公开了一种曝光单元，包括用于发射对应于曝光信号的激光束的激光束发射器; 旋转多面镜部，包括用于接收和偏离激光束的旋转多面镜; 用于接收偏离的激光束并产生用于发射的聚焦光束的f-θ透镜; 以及设置在预定光路上的多个反射器，其起始点是f-theta透镜，其端点是图像形成单元中的感光鼓的表面，并且根据预定的分离距离顺序地布置以接收聚焦光束并反射聚焦光束沿着预定光路多次，以使聚焦光束到达感光鼓的表面。多个反射器包括前端反射器和端部反射器，前端反射器用于接收聚焦光束，端部反射器用于将聚焦的光束反射到感光鼓的表面。从端反射器到感光鼓的表面的距离小于预定间隔距离和从前端反射器到旋转多面镜的距离。

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