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1. 发明授权

US5680648A Light projection type distance measuring device for auto-focusing in camera 失效
标题翻译：照相机自动对焦的投光式距离测量装置
公开(公告)号：US5680648A
公开(公告)日：1997-10-21
申请号：US338250
申请日：1994-11-14
申请人： Osamu Nonaka
发明人： Osamu Nonaka
IPC分类号： G02B7/32 , G02B7/78
CPC分类号： G02B7/32
摘要： A light-emitting section projects distance measurement light toward an object to be photographed. A switching section sequentially switches the projection direction of the distance measurement light projected from the light-emitting section. A first light-receiving section is arranged at a position separated from the light-emitting section by a first base length. The first light-receiving section receives a reflected light beam of the distance measurement light from the object and outputs a first signal corresponding to the incident position of the reflected light beam. The second light-receiving section receives a reflected light beam of the distance measurement light from the object and outputs a second signal corresponding to the incident position of the reflected light beam. An object distance calculating section calculates the object distance in accordance with first and second signals corresponding to the incident positions and output from the first and second light-receiving sections.
摘要翻译：发光部将距离测量光投影到被拍摄物体。切换部顺序地切换从发光部投影的距离测量光的投射方向。第一光接收部分布置在与发光部分分开第一基底长度的位置处。第一光接收部分接收来自物体的距离测量光的反射光束，并输出与反射光束的入射位置对应的第一信号。第二光接收部分接收来自物体的距离测量光的反射光束，并输出与反射光束的入射位置对应的第二信号。对象距离计算部分根据与入射位置对应的第一和第二信号来计算物体距离，并从第一和第二光接收部分输出。

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