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    • 3. 发明授权
    • Apparatus for detecting the focus adjusted state of an objective lens
    • 用于检测物镜的焦点调整状态的装置
    • US4855777A
    • 1989-08-08
    • US162575
    • 1988-03-01
    • Yasuo SudaMasaki HigashiharaTerutake Kadohara
    • Yasuo SudaMasaki HigashiharaTerutake Kadohara
    • G02B7/34
    • G02B7/34
    • An focus detecting apparatus has a scanning plate disposed on or near the predetermined imaging plane of an objective lens and reciprocally movable to grating-scan the image of an object, a mask having an aperture adjacent to the scanning plate and movable to a desired position in a plane perpendicular to the optic axis of the objective lens to determine a range for detection, a plurality of light-receiving devices for receiving light fluxes passed through the scanning plate and the mask and outputting a signal regarding the focus adjusted state of the objective lens, and a field lens for relating the light fluxes entering the light-receiving devices to each other so as to pass through different areas of the exit pupil of the objective lens.
    • 焦点检测装置具有设置在物镜的预定成像平面上或附近的扫描板,并且可往复移动以对物体的图像进行光栅扫描;掩模具有邻近扫描板的孔,并可移动到所需位置 垂直于物镜的光轴的平面以确定检测范围;多个用于接收通过扫描板和掩模的光束的光接收装置,并输出关于物镜的焦点调整状态的信号 以及用于将进入光接收装置的光束彼此相关联以通过物镜的出射光瞳的不同区域的场透镜。
    • 8. 发明授权
    • Automatic focusing device
    • 自动对焦装置
    • US5081479A
    • 1992-01-14
    • US467196
    • 1990-01-18
    • Terutake KadoharaAkira AkashiMasaki HigashiharaIchiro Ohnuki
    • Terutake KadoharaAkira AkashiMasaki HigashiharaIchiro Ohnuki
    • G03B13/36G02B7/28G02B7/36
    • G02B7/36
    • This invention relates to an automatic focusing device, particular capable of foreseeing the position of an object after a predetermined future time based on the results of a plurality of past focusing operations, thus enabling the focusing to the object. An automatic focusing device is provided which executes calculations for the abovementioned foreseeing after the execution of a predetermined number of focusing operations. However, if a focused state is identified in a focusing operation in the course of the execution of the predetermined number of focusing operations, the device is adapted to disregard the first-mentioned focusing operation as if it had not been conducted and to exclude the first-mentioned focusing operation from the counting of the predetermined number of focusing operations.
    • 本发明涉及一种自动聚焦装置,其特别是能够基于多个过去的聚焦操作的结果预测在预定的未来时间之后的物体的位置,从而能够对对象进行聚焦。 提供了一种自动对焦装置,其在执行预定数量的聚焦操作之后执行上述预见的计算。 然而,如果在执行预定数量的聚焦操作的过程中在聚焦操作中识别到聚焦状态,则该设备适于忽视首先提到的聚焦操作,就好像它未被执行,并且排除第一 来自对预定次数的聚焦操作的计数的所述聚焦操作。
    • 10. 发明授权
    • Auto focus adjusting device
    • 自动对焦调整装置
    • US5005037A
    • 1991-04-02
    • US528908
    • 1990-05-29
    • Akira AkashiTerutake KadoharaIchiro OhnukiMasaki Higashihara
    • Akira AkashiTerutake KadoharaIchiro OhnukiMasaki Higashihara
    • G02B7/28G03B13/36
    • G02B7/282
    • Apparatus for use with an autofocus adjusting device which has a focus detecting circuit for detecting a focus state of an imaging optical system, and a driving circuit for driving the imaging optical system in accordance with the detected focus has a calculation circuit for performing a first calculation in which imaging plane positions at a plurality of points of time in the past and in the present time are determined on the basis of a signal representing a focusing state in the past and a signal representing a focusing state at the latest time to determine coefficients of a predetermined higher order function. The calculation circuit also performs a second calculation in which an imaging plane position at a time after a predetermined period of time has past is determined on the basis of the higher order function. A regulation circuit regulates the signal representing the focusing state detected by the focus detecting circuit when the second calculation is performed, and causes the second calculation to be performed on the basis of the regulated signal. A control circuit is provided for transmitting the signal representing the imaging plane position obtained by the calculation circuit to the driving circuit for driving the imaging optical system. This allows proper focus point prediction even when the zoom state of a zoom lens changes.
    • 用于具有用于检测成像光学系统的聚焦状态的聚焦检测电路的自动对焦调整装置和根据检测到的焦点驱动成像光学系统的驱动电路的装置具有用于执行第一计算的计算电路 其中在过去和当前时间的多个时间点处的成像平面位置基于表示过去的聚焦状态的信号和表示最近时间的聚焦状态的信号来确定,以确定系数 预定的高阶函数。 计算电路还执行第二计算,其中基于较高阶函数确定在预定时间段之后的时间过去的成像平面位置。 当执行第二次计算时,调节电路调节表示由焦点检测电路检测到的聚焦状态的信号,并且基于调节信号进行第二次计算。 提供控制电路,用于将表示由计算电路获得的成像平面位置的信号传输到用于驱动成像光学系统的驱动电路。 即使当变焦镜头的变焦状态改变时,也允许适当的对焦点预测。