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    • 111. 再颁专利
    • Focus adjustment information forming device
    • 聚焦调整信息形成装置
    • USRE36280E
    • 1999-08-24
    • US057113
    • 1993-05-04
    • Takashi KawabataYukio OdakaHiroshi MiyanariEiji NishimoriToshiaki ShinguYasuteru IchidaHidetoshi Masuda
    • Takashi KawabataYukio OdakaHiroshi MiyanariEiji NishimoriToshiaki ShinguYasuteru IchidaHidetoshi Masuda
    • G02B7/28G03B3/00
    • G02B7/285Y10S706/90
    • Disclosed is a focus adjustment information forming device of the kind arranged to measure distances at a plurality of distance measuring areas on a picture plane specified by optical means which has its focal point being adjusted and to form information on adjustment of the focal point, the plurality of distance measuring areas including a center distance area located approximately in the center of the picture plane. The device comprises first priority means for giving priority to a measured distance value which represents the nearest distance among measured distance values obtained from the distance measuring areas; a second priority means for giving priority to the measured distance value obtained from the center distance measuring area according to its relations to the measured distance values of other distance measuring areas when one of the measured distance values of the distance measuring areas other than the center distance measuring area represents the nearest distance; and focus adjustment information forming means for forming information on adjustment of the focal point of the optical means on the basis of outputs of the first and second priority means.
    • 公开了一种焦点调节信息形成装置,其被配置为测量由调整其焦点的光学装置指定的图像平面上的多个距离测量区域处的距离,并形成关于焦点调整的信息,多个 的距离测量区域,包括大致位于图像平面中心的中心距离区域。 该装置包括优先考虑测量距离值的第一优先装置,该测量距离值表示从距离测量区域获得的测量距离值之间的最近距离; 第二优先装置,用于根据其与其它距离测量区域的测量距离值的关系,从中心距离测量区域获得的测量距离值优先考虑,除了中心距离之外的距离测量区域的测量距离值之一 测量面积代表最近的距离; 以及焦点调整信息形成装置,用于根据第一和第二优先装置的输出形成关于调节光学装置的焦点的信息。
    • 113. 发明授权
    • Distance measuring device
    • 距离测量装置
    • US5550628A
    • 1996-08-27
    • US441955
    • 1995-05-16
    • Takashi Kawabata
    • Takashi Kawabata
    • G01C3/06G01C3/00G01C3/10G02B7/32G03B13/36G02B7/04G03B3/00
    • G01C3/10
    • A distance measuring apparatus provided with a plurality of light-emitting units and a plurality of light-receiving units. The light emission period of each of the light-emitting units is changed over at each predetermined period interval. A plurality of light-receiving elements constituting each light-receiving unit are constructed so as to receive the reflected lights from a plurality of distance measurement fields of view on an object to be photographed in a plurality of distance measurement zones obtained by dividing a range to be measured into several blocks. The input signal from each of the light-receiving elements in each of the distance measurement zones is changed over in synchronism with the light emission period of the light-emitting units and the output signals for the respective distance measurement zones are compared, whereby a distance data indicative of the distance measurement zone most approximate to the object distance is put out.
    • 一种设置有多个发光单元和多个光接收单元的测距装置。 每个发光单元的发光周期以每个预定周期间隔被切换。 构成每个光接收单元的多个光接收元件被构造成从多个距离测量区域中接收来自多个距离测量区域中的多个距离测量视场中的反射光, 被测量成几个块。 每个距离测量区域中的每个光接收元件的输入信号与发光单元的发光周期同步地转换,并且比较各个距离测量区域的输出信号,由此距离 推出最接近物距的表示距离测量区的数据。
    • 114. 发明授权
    • Focus adjustment information forming device
    • 重点调整信息形成装置
    • US5121151A
    • 1992-06-09
    • US693773
    • 1991-04-26
    • Takashi KawabataYukio OdakaHiroshi MiyanariEiji NishimoriToshiaki ShinguYasuteru IchidaHidetoshi Masuda
    • Takashi KawabataYukio OdakaHiroshi MiyanariEiji NishimoriToshiaki ShinguYasuteru IchidaHidetoshi Masuda
    • G02B7/28
    • G02B7/285Y10S706/90
    • Disclosed is a focus adjustment information forming device of the kind arranged to measure distances at a plurality of distance measuring areas on a picture plane specified by optical means which has its focal point being adjusted and to form information on adjustment of the focal point, the plurality of distance measuring areas including a center distance area located approximately in the center of the picture plane. The device comprises first priority means for giving priority to a measured distance value which represents the nearest distance among measured distance values obtained from the distance measuring areas; a second priority means for giving priority to the measured distance value obtained from the center distance measuring area according to its relations to the measured distance values of other distance measuring areas when one of the measured distance values of the distance measuring areas other than the center distance measuring area represents the nearest distance; and focus adjustment information forming means for forming information on adjustment of the focal point of the optical means on the basis of outputs of the first and second priority means.
    • 公开了一种焦点调节信息形成装置,其被配置为测量由调整其焦点的光学装置指定的图像平面上的多个距离测量区域处的距离,并形成关于焦点调整的信息,多个 的距离测量区域,包括大致位于图像平面中心的中心距离区域。 该装置包括优先考虑测量距离值的第一优先装置,该测量距离值表示从距离测量区域获得的测量距离值之间的最近距离; 第二优先装置,用于根据其与其它距离测量区域的测量距离值的关系,从中心距离测量区域获得的测量距离值优先考虑,除了中心距离之外的距离测量区域的测量距离值之一 测量面积代表最近的距离; 以及焦点调整信息形成装置,用于根据第一和第二优先装置的输出形成关于调节光学装置的焦点的信息。
    • 117. 发明授权
    • Automatic focusing device having a hunting prevention circuit
    • 自动对焦装置,具有防振电路
    • US4687915A
    • 1987-08-18
    • US829792
    • 1986-02-14
    • Shinji SakaiTakashi Kawabata
    • Shinji SakaiTakashi Kawabata
    • G02B7/36G03B3/10
    • G02B7/36
    • In automatic focusing devices of the type which detect a defocus degree and a focusing direction and according to the results of detection, automatically shift a lens to an in-focus position, an accurate defocus degree cannot be obtained when the lens position is far away from an in-focus point. In such a case, focus detection must be carried out by driving the lens in the focusing direction solely according to information on the focusing direction, which, because of a weak signal from the detection output necessitates a slow lens driving speed and accordingly takes a long time for shifting the lens position to an in-focus point. Another problem with conventional devices is the possibility of overshoot which happens while bringing the lens to the in-focus point by driving it to a defocus degree. Then, after such anovershoot, the lens is again driven to the defocus degree in the reverse direction. This results in a second hunting which tends to occur before the in-focus position is attained. An automatic focusing device according to the invention solves these problems by driving the lens in the focusing direction, detected when the lens is in a position away from an in-focus point and by inhibiting the detecting action while the lens is driven. Furthermore, when overshoot once happens, the detected defocus degree is decreased and the decreased defocus degree is transmitted to a lens drive circuit driving the lens to a decreased degree in the next lens driving process to preclude the possibility of hunting.
    • 在检测散焦度和聚焦方向的自动聚焦装置中,根据检测结果,自动将透镜移动到对焦位置,当透镜位置远离时,不能获得准确的散焦度 一个对焦点。 在这种情况下,必须通过根据关于聚焦方向的信息在聚焦方向上驱动透镜来进行焦点检测,由于来自检测输出的弱信号需要较慢的透镜驱动速度,因此需要长时间 将镜头位置移动到对焦点的时间。 常规器件的另一个问题是通过将透镜驱动到散焦点将透镜带到对焦点时发生过冲的可能性。 然后,在这种反转之后,透镜再次被驱动到相反方向的散焦度。 这导致在获得对焦位置之前倾向于发生的第二次捕获。 根据本发明的自动对焦装置通过在聚焦方向上驱动透镜来解决这些问题,当镜头处于远离对焦点的位置时检测,并且通过在镜头被驱动的同时禁止检测动作来解决这些问题。 此外,当发生过冲时,检测到的散焦度减小,并且降低的散焦度在下一个透镜驱动过程中被传送到在较低程度上驱动透镜的透镜驱动电路,以排除拍摄的可能性。
    • 120. 发明授权
    • Distance measuring device with various controls of the light emitting
means
    • 距离测量装置,具有发光装置的各种控制
    • US4642451A
    • 1987-02-10
    • US595283
    • 1984-03-30
    • Tokuichi TsunekawaYuichi SatoTakashi KawabataSusumu Matsumura
    • Tokuichi TsunekawaYuichi SatoTakashi KawabataSusumu Matsumura
    • G01C3/10G02B7/32G01J1/20G01J1/32
    • G02B7/32G01C3/10
    • In the disclosed distance measuring device a light source projects light on an object to be photographed. A photo-electric converter for receiving light reflected from the object includes at least one photo-electric converting portion whose electric charge varies according to the quantity of light incident thereon. A control includes a first electric charge store which stores an electric charge produced at the photo-electric converting portion while the light is projected from the light source, a second electric charge store which stores an electric charge produced at the photo-electric converting portion while light is not projected from the light source, and a detector which detects at least one of the amounts of electric charge stored at the first and second electric charge stores. The control varies the quantity of light projected by the light source on the basis of the result detected by the detector.
    • 在所公开的距离测量装置中,光源将光照射在待拍摄物体上。 用于接收从物体反射的光的光电转换器包括至少一个电荷转换部分,其电荷根据入射到其上的光量而变化。 控制装置包括:第一电荷存储器,存储光源从光源投射时在光电转换部分产生的电荷;存储在光电转换部分产生的电荷的第二电荷存储器, 光不从光源投射,并且检测器检测存储在第一和第二电荷存储器中的电荷量中的至少一个。 该控制基于由检测器检测到的结果来改变由光源投射的光量。