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    • 1. 发明授权
    • Automatic focusing control system
    • 自动对焦控制系统
    • US4777505A
    • 1988-10-11
    • US928164
    • 1986-11-07
    • Daisuke HataSusumu IguchiYoshimi OhnoTakao YamaguchiTakayuki HataseKazumasa Aoki
    • Daisuke HataSusumu IguchiYoshimi OhnoTakao YamaguchiTakayuki HataseKazumasa Aoki
    • G02B7/09G02B7/36G03B13/36G03B3/00
    • G02B7/36
    • An automatic focusing control system includes a focus detecting light detector, a rangefinder, a lens driver, a manual range setting unit, a mode setting unit, and a control unit. When a manual mode is selected by the mode setting unit, the control unit applies a lens driving signal from the manual range setting unit to the lens driver unit to drive a lens. When an automatic mode is selected by the mode setting unit, the control unit operates the lens driver unit to drive the lens based on a measured distance at the time distance measurement is possible, applies the lens driving signal from the manual range setting unit to the lens driver unit at the time distance measurement is impossible, and operates the lens driver unit to drive the lens based on the measured distance at the time distance measurement becomes possible from a condition in which distance measurement is impossible.
    • 自动对焦控制系统包括焦点检测光检测器,测距仪,透镜驱动器,手动量程设置单元,模式设置单元和控制单元。 当通过模式设置单元选择手动模式时,控制单元将来自手动范围设置单元的镜头驱动信号施加到镜头驱动器单元以驱动镜头。 当通过模式设置单元选择自动模式时,控制单元操作透镜驱动单元以在距离测量可能时基于测量距离来驱动透镜,将来自手动范围设置单元的透镜驱动信号应用于 透镜驱动器单元在距离测量不可能的情况下操作,并且在距离测量不可能的条件下,基于测量距离来操作透镜驱动单元以驱动透镜。
    • 2. 发明授权
    • Auto-focus arithmetic device
    • 自动对焦算术装置
    • US4831405A
    • 1989-05-16
    • US104989
    • 1987-10-06
    • Daisuke HataSusumu IguchiYoshimi OhnoKazumasa AokiTakayuki Hatase
    • Daisuke HataSusumu IguchiYoshimi OhnoKazumasa AokiTakayuki Hatase
    • G02B7/34G02B7/28G02B7/36G03B13/36
    • G02B7/36
    • An auto-focus arithmetic device suitable for use in a photographic camera is provided. The device includes a photographic lens which is movable along a predetermined optical axis and a CCD for detecting light coming from a subject of interest through the lens. An arithmetic unit for determining the direction and amount of movement of the lens with respect to the subject of interest based on a detection signal from the CCD is provided. The arithmetic unit includes an integer portion calculating sub-unit for calculating an integer portion of the detection signal and a fractional portion calculating sub-unit for calculating a fractional portion of the detection signal. The fractional portion calculating sub-unit remains deactivated as long as the detected amount of discrepancy from the in-focus condition is larger than a predetermined level; however, it is activated when the detected amount of discrepancy becomes equal to or less than the predetermined level. In this manner, in accordance with the present invention, the integer and fractional portion calculating sub-units are used alternately.
    • 提供适用于照相机的自动对焦运算装置。 该装置包括可沿预定光轴移动的照相镜头和用于检测通过透镜的感兴趣对象的光的CCD。 提供了一种用于基于来自CCD的检测信号确定透镜相对于感兴趣对象的移动方向和移动量的运算单元。 算术单元包括用于计算检测信号的整数部分的整数部分计算子单元和用于计算检测信号的小数部分的分数部分计算子单元。 只要检测到的从对焦条件的差异量大于预定水平,分数部分计算子单元就保持停用。 然而,当检测到的差异量变得等于或小于预定水平时,它被激活。 以这种方式,根据本发明,交替使用整数和分数部分计算子单元。
    • 6. 发明授权
    • Range finder
    • 测距仪
    • US5631458A
    • 1997-05-20
    • US552538
    • 1995-11-03
    • Toshiaki NakahiraSusumu IguchiKazumasa AokiYoshihiko Shimura
    • Toshiaki NakahiraSusumu IguchiKazumasa AokiYoshihiko Shimura
    • G01C3/06G02B7/32G03B13/36H01J40/14
    • G02B7/32
    • In a range finder, a capacitor for light emission is charged by turning off first and second switching elements and turning on third and fourth switching elements before light is emitted from a light emitting diode. A sum of a charging voltage of the capacitor for light emission and the voltage of a direct current power source is applied to the light emitting diode by turning on the first and second switching elements and turning off the third and fourth switching elements when light is emitted from the light emitting diode. At this time, an operation of the second switching element is controlled with a constant electric current by a constant current control circuit constructed by a transistor, a resistor for current limitation, a diode, etc. so that an electric current flowing through the light emitting diode is constant and a light emitting amount of the light emitting diode becomes constant.
    • 在测距仪中,通过在从发光二极管发出光之前关闭第一和第二开关元件并接通第三和第四开关元件来对发光的电容器进行充电。 用于发光的电容器的充电电压和直流电源的电压之和通过接通第一和第二开关元件并在发光时将第三和第四开关元件断开而施加到发光二极管 从发光二极管。 此时,通过由晶体管,电流限制用电阻器,二极管等构成的恒流控制电路,以恒定的电流来控制第二开关元件的动作,使得流过发光的电流 二极管是恒定的,并且发光二极管的发光量变得恒定。