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公开(公告)号：US4849813A
公开(公告)日：1989-07-18
申请号：US191886
申请日：1988-05-09
IPC分类号： H04N5/235 , H04N5/238 , H04N5/335 , H04N5/341 , H04N5/347 , H04N5/355 , H04N5/372 , H04N5/378
摘要： According to the present invention, a narrow latitude caused by a narrow dynamic range of a solid state image pickup device is improved, and a video camera capable of obtaining a high quality video signal having no signal saturation and black collapse is realized. Scanning is executed in a plurality of times during normal one picture scanning period (one field or one frame period) prescribed in the broadcasting system, and the stop value of a stop mechanism of a camera lens is prescribed so that the levels of video signals corresponding to respective pictures become a fixed value, thus obtaining respective output signals with no saturation. These output signals are stored in a memory in each picture unit after A/D conversion. Then, a certain arithmetic processing is performed in synchronization with respective picture positions, and these video signals are outputted in synchronization with the vertical synchronizing timing prescribed in the broadcasting system as digital video signals having predetermined levels. These output digital video signals are restored again to the synchronizing frequency prescribed in the orginal broadcasting system thereafter. The digital video signals thus obtained have S/N improved to be better than the video signal which is outputted from the image pickup device. Accordingly, the dynamic range is also improved sufficiently.
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公开(公告)号：US4621292A
公开(公告)日：1986-11-04
申请号：US661326
申请日：1984-10-16
CPC分类号： G01S17/48 , G02B7/32 , G03B21/53 , H04N5/23212
摘要： An automatic focusing device for a video camera includes a projector for projecting an infrared ray used for measuring distances and a converging lens for focusing reflected infrared ray light from an object whose distance is to be measured. A light spot detector and a computer are provided for determining whether the video camera is in focus. A lens encoder is utilized to determine the position of a focusing lens and a lens driving unit moves the position of a photographic lens used for photographing the object forwardly or backwardly in dependence upon outputs from the lens encoder and computer so as to automatically focus the video camera in response to the infrared rays reflected from the object to be photographed.
摘要翻译： 用于摄像机的自动聚焦装置包括投影用于测量距离的红外线的投影仪和用于聚焦来自待测距离的物体的反射红外线光的会聚透镜。 提供光点检测器和计算机用于确定摄像机是否处于焦点。 利用透镜编码器来确定聚焦透镜的位置，并且透镜驱动单元根据来自透镜编码器和计算机的输出将用于拍摄物体的摄影镜头的位置向前或向后移动，以便自动对焦视频 照相机响应于要拍摄的物体反射的红外线。
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公开(公告)号：US4850692A
公开(公告)日：1989-07-25
申请号：US876203
申请日：1986-06-19
申请人： Yoshiaki Hirao , Ryuichiro Kuga , Hiroyuki Asakura , Shusuke Ono , Yoshitomi Nagaoka , Shinji Hataji , Hiromichi Tanaka
发明人： Yoshiaki Hirao , Ryuichiro Kuga , Hiroyuki Asakura , Shusuke Ono , Yoshitomi Nagaoka , Shinji Hataji , Hiromichi Tanaka
IPC分类号： G02B7/09 , G01C3/06 , G01C3/10 , G01S7/491 , G02B7/32 , G03B13/36 , H01L31/02 , H01L31/0216 , H04N5/232
CPC分类号： G01C3/10 , G01S7/4816 , G01S7/4912 , G02B7/32 , H01L31/02024 , H01L31/02164 , G01S17/48
摘要： A semiconductor light position detector for a rangefinder which projects a light beam onto an object and receives a reflected light beam from the object to measure a distance to the object. A portion of the light-receiving surface of the detector on which the reflected beam will not form a light spot is partially covered with a member that blocks unwanted light. Thus, the malfunctions caused by the flare component of the light from the light projector and the malfunctions due to increases in the shot noise under a high illuminance are reduced greatly.
摘要翻译： 一种用于测距仪的半导体光位置检测器，其将光束投射到物体上并接收来自物体的反射光束以测量到物体的距离。 反射光束不会形成光点的检测器的光接收表面的一部分被阻挡不想要的光的部件覆盖。 因此，由于来自投光器的光的耀斑部分引起的故障以及由于在高照度下的喷射噪声的增加而导致的故障大大降低。
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公开(公告)号：US4673274A
公开(公告)日：1987-06-16
申请号：US776031
申请日：1985-09-13
摘要： An automatic focusing system for a camera includes a light emitter for emitting a distance measuring light beam and a condenser lens for condensing the light beam reflected by an object. A light spot detector produces output signals corresponding to the position of the focused spot of reflected light impinging thereon. Various circuitry, including adders and subtracters and amplifiers and rectifiers and integrators are provided for processing the output signals of the light spot detector. A lens encoder detects the existing focusing position of a picture taking lens and further circuitry is provided for comparing the existing focusing position of the picture taking lens with a desired optimum focusing position and for driving the lens by a lens driving unit so as to move the lens to its optimum focusing position.
摘要翻译： 用于照相机的自动对焦系统包括用于发射距离测量光束的光发射器和用于聚焦由物体反射的光束的聚光透镜。 光点检测器产生对应于其上照射的反射光的聚焦光点的位置的输出信号。 提供各种电路，包括加法器和减法器以及放大器和整流器和积分器，用于处理光点检测器的输出信号。 透镜编码器检测图像拍摄镜头的现有对焦位置，并且提供另外的电路用于将摄像镜头的现有聚焦位置与期望的最佳聚焦位置进行比较，并且用于通过透镜驱动单元驱动透镜， 透镜到其最佳聚焦位置。
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公开(公告)号：US4758764A
公开(公告)日：1988-07-19
申请号：US870119
申请日：1986-06-03
CPC分类号： H01L33/58
摘要： In an automatic focus adjustment apparatus with a light-emitting device comprising a condenser lens and a light-emitting element which radiates light onto an object and adjusts the focal point according to a light reflected back from the object, undesired flare is eliminated by placing a diaphragm sufficiently close to the light-emitting element so that only the effective light from the element passes to the condenser lens by using a cap, an opaque paint or a spatial filter, and/or by applying a low reflectance paint to the inner wall of an outer casing of the light-emitting device.
摘要翻译： 在具有发光装置的自动调焦装置中，该发光装置包括聚光透镜和发光元件，该发光元件将光照射到物体上并且根据从物体反射回来的光调节焦点，通过放置一个 隔膜足够靠近发光元件，使得仅通过使用盖子，不透明涂料或空间滤光器，来自元件的有效光通过聚光透镜，和/或通过将低反射涂料施加到 发光装置的外壳。
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公开(公告)号：US5077613A
公开(公告)日：1991-12-31
申请号：US472291
申请日：1990-01-30
CPC分类号： H03K5/153 , H04N5/23212
摘要： A video camera with an automatic focusing device includes a pre-process unit for eliminating a direct current component from a signal of the video camera and controlling the obtained signal so that the amplitude thereof can be at a constant level, which is disposed at the preceding stage of a signal processing unit for operating the focusing condition of an object from the signal of the video camera. An amplitude of a video signal to be inputted to the signal processing unit can be largely suppressed, thus providing a largely simplified circuit structure of a signal processing unit.
摘要翻译： 具有自动聚焦装置的摄像机包括：预处理单元，用于从摄像机的信号中消除直流分量，并控制所获得的信号，使得其幅度可以处于恒定水平，其设置在前面 信号处理单元的级，用于根据摄像机的信号操作对象的聚焦状态。 可以大大抑制要输入到信号处理单元的视频信号的幅度，从而提供信号处理单元的大大简化的电路结构。
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公开(公告)号：US4991944A
公开(公告)日：1991-02-12
申请号：US290195
申请日：1988-12-27
申请人： Yoshiaki Hirao , Ryuichiro Kuga , Masayuki Yoneyama , Shusuke Ono
发明人： Yoshiaki Hirao , Ryuichiro Kuga , Masayuki Yoneyama , Shusuke Ono
摘要： A zoom lens driving apparatus always detects a position of an image magnification varying lens section, and drives the image magnification varying lens section in accordance with a preset relationship between the position of the image magnification varying lens section and a zoom driving speed in such a manner that the driving speed becomes higher on one side, where the focal length of the zoom lens corresponding to the position of the image magnification varying lens section is small, than on another side where the focal length is large. Accordingly, the amount of focal shift, which in the zoom lens of the inner focusing system would otherwise abruptly increase with increasing focal length, is significantly suppressed, so that an auto focus adjusting mechanism or a focus correcting device effective during zooming, provided in the zoom lens, can function satisfactorily as to follow the focal shift of the zoom lens, whereby the lens control of a superior response can always be achieved.
摘要翻译： 变焦透镜驱动装置总是检测图像倍率变化透镜部的位置，并且以这种方式根据图像倍率变化透镜部的位置和变焦驱动速度之间的预设关系来驱动图像倍率变化透镜部 与焦距在另一侧相比，与图像倍率变化透镜部分的位置对应的变焦镜头的焦距在一侧的驱动速度变高。 因此，内聚焦系统的变焦透镜中随着焦距增加而突然增加的焦点偏移量被显着地抑制，使得自动聚焦调节机构或焦点校正装置在变焦期间有效，在 变焦镜头能够令人满意地起到跟随变焦镜头的焦点偏移的作用，从而可以始终实现卓越响应的镜头控制。
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公开(公告)号：US4975726A
公开(公告)日：1990-12-04
申请号：US272898
申请日：1988-11-18
CPC分类号： G02B7/365 , H04N5/23212
摘要： An automatic focusing apparatus uses an image signal provided by a lens system of a camera for focusing the taking lens system. The apparatus includes: a lens system; a pickup element for converting the optical image of an object formed by the lens system into a corresponding electric signal; a signal processing circuit which processes the output signal of the pickup element to provide two focus signals corresponding to the respective quantities of horizontal and vertical high-frequency components of the object in an image plane; a lens driving mechanism for driving the lens system; and a control unit for controlling the lens driving mechanism according to the two focus signals to focus the lens system. Preferably, the apparatus further includes: a detector for detecting the condition of the object or the viewing conditions and a changeover circuit for changing over the characteristics of the signal processing circuit on the basis of the output of the detector. The additional use of information about the vertical direction enables the focusing of the lens system for any object including a horizontal line. Since the characteristics of the signal processing circuit are changed selectively according to the condition of the object or the viewing conditions, a stable and accurate focusing operation can be achieved regardless of the variation of the condition of the object.
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公开(公告)号：US4924317A
公开(公告)日：1990-05-08
申请号：US254683
申请日：1988-10-07
申请人： Yoshiaki Hirao , Ryuichiro Kuga , Masayuki Yoneyama , Shusuke Ono
发明人： Yoshiaki Hirao , Ryuichiro Kuga , Masayuki Yoneyama , Shusuke Ono
IPC分类号： H04N5/232
CPC分类号： H04N5/23212
摘要： A video camera has an automatic focusing system provided with a focus detecting section for calculating and outputting a focus signal corresponding to a focus condition of an picked-up image from a video signal produced by an image pickup element. Either the image pickup element or a focusing lens in a photographic lens is oscillated back and forth of its present position, as needed, to detect an in-focus direction at the moment. The focusing lens is moved in the in-focus direction up to a position at which an optimum focus condition is obtained.
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公开(公告)号：US4591736A
公开(公告)日：1986-05-27
申请号：US450102
申请日：1982-12-15
申请人： Yoshiaki Hirao , Yoshitomi Nagaoka
发明人： Yoshiaki Hirao , Yoshitomi Nagaoka
CPC分类号： G11C27/026
摘要： A pulse signal amplitude storage-holding apparatus utilizes a plurality of series connected storage-holding circuits which store and hold the pulse magnitude of an electrical pulse signal whose amplitude is to be stored. At least one electrical pulse signal amplitude compensating circuit may be added to compensate for a storage error with respect to the pulse magnitude of the electrical pulse signal caused by the charge and discharged characteristics of each of the storage-holding circuits. In the alternative, at least one of the storage-holding circuits may be arranged so as to output an output signal accompanied by an overshoot of a fixed amount with respect to the input pulse signal, the overshoot thereby compensating for the abovenoted storage error.
摘要翻译： 脉冲信号幅度存储保持装置利用多个串联连接的存储保持电路，其存储和保持振幅要存储的电脉冲信号的脉冲幅度。 可以添加至少一个电脉冲信号幅度补偿电路以补偿由每个存储保持电路的充电和放电特性引起的电脉冲信号的脉冲幅度的存储误差。 另一方面，存储保持电路中的至少一个可以被布置为输出伴随着输入脉冲信号的固定量的过冲的输出信号，从而补偿上述的存储误差。
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