发明授权
- 专利标题: Electrically controlled camera device
- 专利标题(中): 电控相机设备
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申请号: US849198申请日: 1977-11-07
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公开(公告)号: US4171884A公开(公告)日: 1979-10-23
- 发明人: Seijiro Tokutomi , Masahiro Kawasaki , Yoshio Sawada , Katsuhiko Miyata
- 申请人: Seijiro Tokutomi , Masahiro Kawasaki , Yoshio Sawada , Katsuhiko Miyata
- 申请人地址: JPX Tokyo
- 专利权人: Asahi Kogaku Kogyo Kabushiki Kaisha
- 当前专利权人: Asahi Kogaku Kogyo Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX51-133459 19761106
- 主分类号: G03B7/091
- IPC分类号: G03B7/091 ; G03B17/18 ; G03B17/00
摘要:
An electrically controlled camera device is disclosed which includes a counter for counting the number of pulses representative of the preferentially selected one exposure condition of a shutter speed and a diaphragm aperture level to control the preferentially selected one exposure condition, and a digital operation circuit for calculating the other exposure condition in the form of a number of digital pulses in accordance with the output pulses from the counter and with digital data signals representative of the sensed scene brightness and the film sensitivity used. During automatic exposure, the number of pulses counted by the counter is controlled by the combination of a pulse generator and a single-throw mechanical switch connected between the pulse generator and the counter, and the number of output digital pulses from the digital operation circuit is counted by another counter for controlling the other exposure condition. During manual exposure, the number of pulses representative of the other exposure condition is controlled by the combination of the pulse generator and another single-throw mechanical switch and counted by the other counter coupled to the pulse generator through an automatic/manual change-over switch and the other single-throw mechanical switch and controlling the other exposure condition. Both the single-throw mechanical switches are arranged to be operated by corresponding push buttons mounted outside the camera housing, and two sets of indicator lamps for displaying both the exposure conditions are arranged within the field of view of the camera finder.
公开/授权文献
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