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    • 37. 发明授权
    • Camera
    • 相机
    • US5603067A
    • 1997-02-11
    • US355050
    • 1994-12-13
    • Shigenori GotoTatsuo SaitoShiro Hashimoto
    • Shigenori GotoTatsuo SaitoShiro Hashimoto
    • G03B17/00G03B1/50G03B17/02G03B17/18G03B17/28G03B17/36G03B7/00G03B17/26
    • G03B1/50G03B17/02G03B17/18
    • A camera is of a type using the 120 size of roll film or the 220 size of roll film, which is so arranged that the height of a pressure plate on a back lid is changed over depending upon a type of a used film. A reflection-type photosensor is provided in the camera body, whereby a state of a lock mechanism of the back lid is detected. A second reflective plate is mounted on the pressure plate, and the second reflective plate reflects light from the photosensor when the back lid is in a lock state. A reflecting position where the light from the photosensor impinges is changed between reflective portions depending upon the height of the pressure plate. Since reflectivities of these reflective portions are different from each other, the height of the pressure plate, that is, the type of the used film can be determined by analyzing an output from the photosensor receiving the reflected light from the second reflective plate.
    • 相机是使用120尺寸的卷膜或220尺寸的卷膜的类型,其布置成使得背盖上的压板的高度根据所使用的膜的类型而改变。 在相机机体中设置反射型光电传感器,由此检测后盖的锁定机构的状态。 第二反射板安装在压板上,当后盖处于锁定状态时,第二反射板反射来自光电传感器的光。 来自光传感器的光的反射位置根据压板的高度在反射部之间变化。 由于这些反射部分的反射率彼此不同,因此可以通过分析接收来自第二反射板的反射光的光电传感器的输出来确定压板的高度,即所用膜的类型。
    • 38. 发明授权
    • Apparatus for measuring a distance
    • 用于测量距离的装置
    • US5589910A
    • 1996-12-31
    • US357431
    • 1994-12-14
    • Tatsuo SaitoShigenori Goto
    • Tatsuo SaitoShigenori Goto
    • G02B7/28G03B7/099G03B13/36
    • G02B7/285G03B7/09979
    • A distance measuring apparatus according to the present invention comprises two types of distance measuring units, which are a first distance measuring unit of the active method for receiving reflected light of measuring light returning from an object and performing distance measurement based on a focused position thereof, and a second distance measuring unit of the passive method for receiving the natural light reflected by the object through two optical systems and performing the distance measurement based on two optical images thus obtained. The apparatus further has a luminance determining unit for determining a luminance of the external field from a photometry result, and a distance selecting device for selecting and outputting either one of distance measurement results obtained by the first distance measuring unit and second distance measuring unit as a proper distance value, based on the luminance of the external field determined by the luminance determining unit. This distance selecting device may be so arranged that the luminance of external field obtained by the luminance determining unit is determined in two levels of high level and low level. Then it selects the distance measurement result of the first distance measuring unit when the luminance of external field is determined as a low level or selects the distance measurement result of the second distance measuring unit when the luminance of external field is determined as a high level.
    • 根据本发明的距离测量装置包括两种距离测量单元,它们是用于接收从物体返回的测量光的反射光的主动方法的第一距离测量单元,并且基于其聚焦位置进行距离测量, 以及第二距离测量单元,用于通过两个光学系统接收由物体反射的自然光,并且基于由此获得的两个光学图像执行距离测量。 该装置还具有用于从测光结果确定外场亮度的亮度确定单元和用于选择并输出由第一距离测量单元和第二距离测量单元获得的距离测量结果中的任一个的距离选择设备,作为 基于由亮度确定单元确定的外部场的亮度的适当的距离值。 该距离选择装置可以被布置成使得由亮度确定单元获得的外部场的亮度在高电平和低电平的两个级别中确定。 然后,当外部亮度的亮度被确定为低电平时,选择第一距离测量单元的距离测量结果,或者当外部亮度的亮度被确定为高电平时,选择第二距离测量单元的距离测量结果。