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    • 47. 发明授权
    • Photographic camera with an automatic exposure control adapter unit
detachably mounted thereon
    • 具有可拆卸地安装在其上的自动曝光控制适配器单元的照相机
    • US4130355A
    • 1978-12-19
    • US740310
    • 1976-11-09
    • Shohei OhtakiSoichi NakamotoTomonori IwashitaYoshiaki WatanabeSusumu Kozuki
    • Shohei OhtakiSoichi NakamotoTomonori IwashitaYoshiaki WatanabeSusumu Kozuki
    • G03B7/091G03B7/16
    • G03B7/097
    • An automatic exposure control system permitting for a photographic camera to make an exposure in either of the shutter preselection automatic exposure range and the diaphragm preselection automatic exposure range is established by combination of an adapter unit with the camera. This adapter unit has a housing attachable to and detachable from the camera body, and includes an exposure operation and control circuit capable, upon preselection of an exposure time, of deriving an exposure value representing an effective exposure aperture, and, upon preselection of diaphragm value, of deriving an exposure value representing an exposure time. Responsive to the output of the adapter unit, the control device in the camera body controls operation of the shutter and diaphragm mechanisms thereof selectively in accordance with the exposure value derived from said exposure operation and control circuit. The provision for permitting the camera to make an exposure in an automatic flash exposure range is also made at the exposure operation and control circuit of the adapter unit in a manner to determine the period of energization of a flash unit associated with the camera.
    • 通过适配器单元与照相机的组合,建立允许照相机在快门预选自动曝光范围和光圈预选自动曝光范围中的曝光的自动曝光控制系统。 该适配器单元具有可附接到照相机主体并且可从相机主体拆卸的外壳,并且包括曝光操作和控制电路,该曝光操作和控制电路能够在预选曝光时间之后得到表示有效曝光孔径的曝光值,并且在预先选择光阑值 得出表示曝光时间的曝光值。 响应于适配器单元的输出,照相机主体中的控制装置根据从所述曝光操作和控制电路导出的曝光值选择性地控制快门和光阑机构的操作。 在适配器单元的曝光操作和控制电路中,也可以以确定与相机相关联的闪光单元的通电周期的方式来允许相机在自动闪光曝光范围内曝光的设置。