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公开(公告)号：US4647174A
公开(公告)日：1987-03-03
申请号：US769795
申请日：1985-08-26
申请人： Tokuichi Tsunekawa , Kazuya Hosoe , Takao Kinoshita , Takashi Kawabata , Shinji Sakai , Tatsuya Taguchi
发明人： Tokuichi Tsunekawa , Kazuya Hosoe , Takao Kinoshita , Takashi Kawabata , Shinji Sakai , Tatsuya Taguchi
CPC分类号： G02B7/346
摘要： Disclosed is a method of detecting the focusing condition of an image forming optical system to an object, in which two images of the object are formed with respective light beams from the prescribed exit pupil areas lying in almost symmetry to each other with respect to the optical axis of the optical system and are sensed to obtain an equal number of picture element data for each of the images, and based on the thus-obtained picture element data, while sequential shifting for the first image is carried out from its one end to its opposite end, and a sequential shifting for the second image from its symmetric one end thereto to its opposite end, each by a predetermined number of picture elements, a correlation betweeen the first and second images in every predetermined equal number of picture elements is sought, whereby an optimum correlation is obtained, the corresponding mutual positional relationship between the above-described predetermined numbers of picture elements is detected to discriminate whether or not the above-described image forming optical system is in focus for the above-described object.
摘要翻译： 本发明公开了一种检测图像形成光学系统到物体的聚焦状态的方法，其中物体的两个图像形成有相对于光学器件彼此几乎对称的规定出射光瞳区域的各个光束 并且被感测以获得每个图像的相等数量的图像元素数据，并且基于如此获得的图像元素数据，而对于第一图像的顺序移位从其一端执行到其第 并且第二图像从其对称的一端到其相对端的顺序移位，每个由预定数量的图像元素，寻求在每个预定的相等数量的图像元素中的第一和第二图像之间的相关性， 从而获得最佳相关性，检测上述预定数量的图像元素之间的对应的相互位置关系 鉴别上述成像光学系统是否对于上述目的而言是焦点。
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公开(公告)号：US4346970A
公开(公告)日：1982-08-31
申请号：US179548
申请日：1980-08-19
申请人： Takashi Kawabata , Tokuichi Tsunekawa , Kazuya Hosoe , Takao Kinoshita , Shinji Sakai , Tatsuya Taguchi
发明人： Takashi Kawabata , Tokuichi Tsunekawa , Kazuya Hosoe , Takao Kinoshita , Shinji Sakai , Tatsuya Taguchi
摘要： Disclosed is a TTL (Through-The-Lens) type focus detecting device for use in an interchangeable lens-equipped camera, in which a plurality of lenslets are positioned at or near the prescribed focal plane of the objective lens, each of the lenslets is associated with two or more pairs of photosensitive elements. Upon attachment of an objective lens to the camera body, one of the pairs of photosensitive elements for each lenslet is automatically selected to operate on the basis of the dimensions of the used objective lens. The outputs of the selected pairs of photosensitive elements for all the lenslets are processed to detect whether or not a positional difference between two images of an object formed with light beams from the objective lens at respective virtual exit pupils lying in almost symmetry with respect to the optical axis thereof is present, whereby the detection of whether or not the objective lens is in-focus is indicated.
摘要翻译： 公开了一种TTL（透镜）型焦点检测装置，用于可更换镜头的相机，其中多个小透镜位于物镜的规定焦平面处或附近，每个小透镜是 与两对或更多对感光元件相关联。 在将物镜附着到相机主体上时，根据所使用的物镜的尺寸自动选择每个小透镜的一对感光元件。 对所有小透镜的所选择的感光元件对的输出进行处理，以检测在相应虚拟出射瞳孔处的物镜形成的来自物镜的光束的两个图像之间的位置差异是否相对于 存在其光轴，由此指示物镜是否为焦点的检测。
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公开(公告)号：US4470676A
公开(公告)日：1984-09-11
申请号：US59635
申请日：1979-07-23
摘要： In the device disclosed, an image formed by an optical system is scanned by an image sensor composed of independently arranged photoelectric transducing elements to produce an image scanning signal. A detecting circuit detects the variation of the brightness between the adjacent image elements as a measure of the sharpness of the image and the focus of the optical system. The focus detection accuracy is improved by non-linear transformation of the brightness variation signal with a non-linear transformation circuit that weighs the brightness variation signal on the basis of the signal level.
摘要翻译： 在所公开的装置中，通过由独立设置的光电转换元件构成的图像传感器来扫描由光学系统形成的图像，以产生图像扫描信号。 检测电路检测相邻图像元件之间的亮度的变化，作为图像的清晰度和光学系统的焦点的量度。 通过基于信号电平对亮度变化信号进行称重的非线性变换电路对亮度变化信号进行非线性变换来提高焦点检测精度。
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公开(公告)号：US4560864A
公开(公告)日：1985-12-24
申请号：US727194
申请日：1985-04-29
摘要： In the device disclosed, an image formed by an optical system is scanned by an image sensor composed of independently arranged photoelectric transducing elements to produce an image scanning signal. A detecting circuit detects the variation of the brightness between the adjacent image elements as a measure of the sharpness of the image and the focus of the optical system. The focus detection accuracy is improved by non-linear transformation of the brightness variation signal with a non-linear transformation circuit that weighs the brightness variation signal on the basis of the signal level. A signal forming circuit detects the difference between the outputs of transducing elements and adds the differences to produce a comparator signal when a predetermined relationship is reached between the sharpness indication and the addition signal. An indicator indicates that the focusing condition cannot be discerned in response to the comparison signal and a control inhibits the output of the detection circuit to the indicator prior to the addition signal.
摘要翻译： 在所公开的装置中，通过由独立设置的光电转换元件构成的图像传感器来扫描由光学系统形成的图像，以产生图像扫描信号。 检测电路检测相邻图像元件之间的亮度的变化，作为图像的清晰度和光学系统的焦点的量度。 通过基于信号电平对亮度变化信号进行称重的非线性变换电路对亮度变化信号进行非线性变换来提高焦点检测精度。 当在锐度指示和加法信号之间达到预定的关系时，信号形成电路检测转换元件的输出之间的差异，并且增加差值以产生比较器信号。 指示符表示响应比较信号不能识别聚焦条件，并且控制在加法信号之前禁止检测电路对指示符的输出。
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公开(公告)号：US4333716A
公开(公告)日：1982-06-08
申请号：US98514
申请日：1979-11-29
摘要： Disclosed is a focus detecting system in which first and second signals corresponding to image forming states at first and second positions each almost at the same distance before and behind a predetermined focal plane of an image forming optical system are obtained. A third signal corresponding to an image forming state at a third position different from the first and the second positions is also obtained. The in-focus state of the image formed by the image forming optical system is detected on the basis of a first comparison signal obtained by comparing the first and the second signals with each other, a second comparison signal obtained by comparing the first and the third signals with each other and a third comparison signal obtained by comparing the second and the third signals with each other.
摘要翻译： 公开了一种焦点检测系统，其中获得对应于在成像光学系统的预定焦平面之前和之后几乎相同距离的第一和第二位置处的图像形成状态的第一和第二信号。 还获得与不同于第一和第二位置的第三位置处的图像形成状态对应的第三信号。 基于通过将第一和第二信号彼此进行比较而获得的第一比较信号来检测由图像形成光学系统形成的图像的对焦状态，通过比较第一和第三信号获得的第二比较信号 彼此之间的信号和通过将第二和第三信号彼此进行比较而获得的第三比较信号。
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公开(公告)号：US4301478A
公开(公告)日：1981-11-17
申请号：US097854
申请日：1979-11-27
CPC分类号： H04N5/23212
摘要： In the disclosed TV camera, a focus detecting device detects the focus of the image optical system by evaluating the image of the object whose image is to be picked up, on the basis of the picture image signal obtained at a predetermined position in the image pick up surface of the image pick up device. At least a part of the image to be evaluated is formed at a position within the scanning area of the image pick up device but outside of the effective image pick up area for TV signals. The image is evaluated on the basis of the picture image signal obtained at this position to detect the focus.
摘要翻译： 在所公开的TV摄像机中，焦点检测装置基于在图像拾取器中的预定位置处获得的图像图像信号，通过评估要拍摄的图像的图像的图像来检测图像光学系统的焦点 图像拾取装置的上表面。 要评估的图像的至少一部分形成在图像拾取装置的扫描区域内的位置处，但是在TV信号的有效图像拾取区域之外。 基于在该位置处获得的图像信号来评估图像以检测焦点。
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公开(公告)号：US4377742A
公开(公告)日：1983-03-22
申请号：US151703
申请日：1980-05-20
摘要： Disclosed is an image sharpness detecting system in which an image formed by an image forming optical system is received by an array of a plurality of optical-electronic transducer elements, and an illumination difference in each individual minute compartment of the above-described image is detected on the basis of the concurrently obtained output signal from a corresponding one of the optical-electronic transducer elements, while all the illumination differences are summed up over the entire area of a sensing region of the above-described image, whereby is obtained a signal representing the degree of sharpness of the image on the above-described array of optical-electronic transducer elements. In this system, the signal representative of the illumination difference in each individual minute compartment of the above-described image is at least non-linearly transformed by utilizing the non-linear characteristics for output versus input of a semiconductor element such as a transistor, and the signal representative of the degree of sharpness of the above-described image is obtained on the basis of the non-linearly transformed signal.
摘要翻译： 公开了一种图像清晰度检测系统，其中通过多个光电子换能器元件的阵列接收由图像形成光学系统形成的图像，并且检测到上述图像的每个单独的分隔室中的照明差异 基于来自相应的一个光电换能器元件的同时获得的输出信号，同时在上述图像的感测区域的整个区域上将所有的照明差值相加，从而获得表示 上述光电换能器阵列阵列上的图像的清晰度。 在该系统中，通过利用诸如晶体管的半导体元件的输出与输入的非线性特性，表示上述图像的每个单独分隔室中的照明差异的信号至少被非线性变换，以及 基于非线性变换信号获得表示上述图像的清晰度的信号。
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公开(公告)号：US4496832A
公开(公告)日：1985-01-29
申请号：US310373
申请日：1981-10-09
摘要： A focusing state discriminating system of the invention discriminates the focusing state of an image forming optical system, based on signals F1, F2 and F3 representing image formation states of images formed at first, second and third positions of the optical system which substantially correspond to positions slightly in front of, coincident with and slightly behind the predetermined focal plane of the image forming optical system. The operation for discrimination in this system includes at least a comparison of .vertline.F1-F3.vertline. and K(F1+F2+F3), where K is a constant.
摘要翻译： 本发明的聚焦状态识别系统基于表示在光学系统的第一，第二和第三位置形成的图像的图像形成状态的信号F1，F2和F3来识别图像形成光学系统的聚焦状态，该图像形成状态基本上对应于位置 略微在前面，与图像形成光学系统的预定焦平面重合并略微落后。 该系统中的鉴别操作至少包括| F1-F3‖和K（F1 + F2 + F3）的比较，其中K是常数。
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公开(公告)号：US4428652A
公开(公告)日：1984-01-31
申请号：US313578
申请日：1981-10-21
CPC分类号： G02B7/38
摘要： A focus detecting system detects an image formation state of an image of an object by processing a time-serial output from a photoelectric transducer element through a high-pass filter. In order to suppress the outputs from the high-pass filter corresponding to the time-serial signal at the initial moment of light reception by the photoelectric transducer element or immediately thereafter, an amplifier is provided which performs the initial setting of the high-pass filter. The input and output ends of the amplifier are connected to parts of the high-pass filter, and the output impedance of the amplifier may be changed in response to a signal from an external source.
摘要翻译： 焦点检测系统通过高通滤波器处理来自光电换能器元件的时间序列输出来检测物体的图像的图像形成状态。 为了抑制由光电元件的光接收的初始时刻对应于时间序列信号的高通滤波器的输出，或者紧接在此之后，设置执行高通滤波器的初始设定的放大器 。 放大器的输入和输出端连接到高通滤波器的一部分，并且放大器的输出阻抗可以响应于来自外部源的信号而改变。
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公开(公告)号：US4415924A
公开(公告)日：1983-11-15
申请号：US245349
申请日：1981-03-19
摘要： In a photoelectric transducer device such as a solid state image pick-up device or sensor having a great number of minute photoelectric transducer elements with their image-receiving surfaces of certain shape arranged in a one-dimensional or two-dimensional manner so that brightness informations of the various individual sections of the object image are sensed by the respective photoelectric transducer elements which then produce outputs in the form of time-sequential signals, the above-described shape of the image-receiving surface area of each of the minute photoelectric transducer elements is made to be such that, as the distance from the center of the image receiving area toward the margin increases, the proportion of the area of a progressively farther concentric zone of the same width is decreased. The shape takes such a form or such characteristics as to be represented by a sampling function or other analogous functions with respect to the scanning direction of the image pick-up device.
摘要翻译： 在诸如具有大量微小光电元件的固态摄像装置或传感器的光电传感器装置中，其一维或二维方式布置有某些形状的图像接收表面，使得亮度信息 目标图像的各个单独部分的各个光电传感器元件由各自的光电转换器元件感测，其然后以时间顺序信号的形式产生输出，每个微型光电换能器元件的图像接收表面积的上述形状 使得当从图像接收区域的中心到边缘的距离增加时，相同宽度的逐渐更远的同心区域的面积的比例减小。 该形状采取这样的形式或这样的特征，以便通过采样功能或与摄像装置的扫描方向相关的其他类似功能来表示。
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