公开(公告)号：US20040112535A1

公开(公告)日：2004-06-17

申请号：US10689541

申请日：2003-10-21

申请人： Olympus Optical Co., Ltd.

发明人： Yasushi Fujimoto ,  Hideaki Endo ,  Takashi Yoneyama ,  Yusuke Amano ,  Susumu Takahashi

IPC分类号： H01L021/306

CPC分类号： G02B7/28 ,  G02B27/40

摘要： A focus detecting device includes a multi-beam producing member for emitting a plurality of light beams; a light-intercepting member for intercepting a part of the plurality of light beams; a beam splitting member having a surface for reflecting or transmitting an incident light beam; a light-condensing optical system for condensing the incident light beam; and a photodetector having at least two light-receiving sections. The multi-beam producing member and the light-intercepting member are placed on a first path of light, and the light-condensing optical system and the photodetector are placed on a second path of light. The beam splitting member is located at the intersection of the optical axis of the first path of light with the optical axis of the second path of light, and the photodetector is located at a position where the light beam is condensed by the light-condensing optical system.

摘要翻译： 焦点检测装置包括用于发射多个光束的多光束产生部件; 用于截取所述多个光束的一部分的遮光部件; 分束构件，具有用于反射或透射入射光束的表面; 用于聚集入射光束的聚光光学系统; 以及具有至少两个光接收部的光检测器。 多光束产生构件和遮光构件被放置在第一光路上，并且聚光光学系统和光电检测器被放置在第二光路上。 分束构件位于第一光路的光轴与第二光路的光轴的交点处，光电检测器位于光束被聚光光学 系统。