发明授权
- 专利标题： Light measuring device for camera
- 专利标题（中）： 照相机测光装置
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申请号： US462458申请日： 1983-01-31
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公开(公告)号： US4509848A公开(公告)日： 1985-04-09
- 发明人: Makoto Katsuma , Akira Hiramatsu , Kazuhiko Arakawa , Hiroyasu Murakami
- 申请人： Makoto Katsuma , Akira Hiramatsu , Kazuhiko Arakawa , Hiroyasu Murakami
- 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： JPX57-17664 19820208; JPX57-17665 19820208
- 主分类号： G03B7/08
- IPC分类号： G03B7/08 ; G03B7/099 ; G03B17/20
摘要：
At least one electro-optical light shielding member is disposed close to a reticle of a photographic camera arranged for forming an image of an object to be photographed. The light shielding member is electrically controlled to have the reticle partly light-shielded by the light shielding pattern of the light shielding member in such a manner as to permit selection between an averaging light measuring mode and a spot light measuring mode.
公开/授权文献
- US4940212A Compact carbonated beverage making system 公开/授权日：1990-07-10
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