发明授权
US4642451A Distance measuring device with various controls of the light emitting
means
失效
距离测量装置，具有发光装置的各种控制
- 专利标题： Distance measuring device with various controls of the light emitting means
- 专利标题（中）： 距离测量装置，具有发光装置的各种控制
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申请号： US595283申请日： 1984-03-30
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公开(公告)号： US4642451A公开(公告)日： 1987-02-10
- 发明人: Tokuichi Tsunekawa , Yuichi Sato , Takashi Kawabata , Susumu Matsumura
- 申请人： Tokuichi Tsunekawa , Yuichi Sato , Takashi Kawabata , Susumu Matsumura
- 申请人地址： JPX
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JPX
- 优先权： JPX58-57202 19830401; JPX58-57203 19830401; JPX58-57205 19830401; JPX58-57209 19830401
- 主分类号： G01C3/10
- IPC分类号： G01C3/10 ; G02B7/32 ; G01J1/20 ; G01J1/32
摘要：
In the disclosed distance measuring device a light source projects light on an object to be photographed. A photo-electric converter for receiving light reflected from the object includes at least one photo-electric converting portion whose electric charge varies according to the quantity of light incident thereon. A control includes a first electric charge store which stores an electric charge produced at the photo-electric converting portion while the light is projected from the light source, a second electric charge store which stores an electric charge produced at the photo-electric converting portion while light is not projected from the light source, and a detector which detects at least one of the amounts of electric charge stored at the first and second electric charge stores. The control varies the quantity of light projected by the light source on the basis of the result detected by the detector.
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