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    • 11. 发明授权
    • Focal point detecting system
    • 焦点检测系统
    • US4315674A
    • 1982-02-16
    • US150959
    • 1980-05-19
    • Kazuya HosoeNobuhiko ShinodaMinoru FukudaTakashi KawabataTakao KinoshitaTadashi Ito
    • Kazuya HosoeNobuhiko ShinodaMinoru FukudaTakashi KawabataTakao KinoshitaTadashi Ito
    • G03B17/00G03B3/10G03B17/20G03B7/08G01J1/20
    • G03B3/10
    • A focal point detection system for detecting the focus adjusting state of an image forming lens during its focusing operation on an object is disclosed. The system comprises a focus detection circuit which produces a detection output that varies with focusing of the lens on the object; a plurality of display elements are provided for display of the focusing state of the lens; and a display control circuit which enables the display elements to display a greater number of focusing states than the number of these display elements through selective combinations of these elements on the basis of the output of the focus detection circuit. The system is capable of displaying intermediate focusing states such as a slightly near-focus state, a slightly far-focus state, and the like in addition to in-focus, near-focus, and far-focus states, so that the focusing state can be displayed stepwise in a detailed manner.
    • 公开了一种用于在对象物的聚焦操作期间检测图像形成透镜的焦点调整状态的焦点检测系统。 该系统包括焦点检测电路,其产生随着透镜在物体上的聚焦而变化的检测输出; 提供多个显示元件用于显示透镜的聚焦状态; 以及显示控制电路,其通过基于焦点检测电路的输出,通过这些元素的选择性组合,使得显示元件能够显示比这些显示元件的数量更多的聚焦状态。 除了聚焦,近焦点和远焦点状态之外,该系统能够显示中等聚焦状态,例如稍微接近焦点状态,稍微远焦点状态等,使得聚焦状态 可以以详细的方式逐步显示。
    • 12. 发明授权
    • Battery voltage checking device for cameras
    • 相机电池电压检测装置
    • US4522480A
    • 1985-06-11
    • US599210
    • 1984-04-12
    • Takashi KawabataNobuhiko ShinodaShinji Sakai
    • Takashi KawabataNobuhiko ShinodaShinji Sakai
    • H02M3/28G03B7/26G03B43/00G03B17/18
    • G03B7/26
    • A battery checking device for cameras of the type having a booster circuit the output of which is fed as electrical power to a load is disclosed. In the case of the camera of the type described, when the battery voltage is checked at the output of the booster circuit, an accurate checking operation cannot be carried out. The present invention, therefore allows the voltage at the input of the booster circuit to be checked. Since another problem is that the booster circuit, after having been actuated, takes a predetermined time before its operation is stabilized, and the value of voltage as sensed during this time does not provide an accurate representation, the present invention provides that checking of that input voltage begins after the elapse of a predetermined time from the actuation of the booster circuit when the operation of the booster circuit becomes stable. Accordingly, it is made possible to achieve always an accurate and reliable battery checking operation.
    • 公开了一种具有升压电路类型的照相机的电池检查装置,该升压电路的输出作为电力被馈送到负载。 在所述类型的照相机的情况下,当在升压电路的输出端检查电池电压时,不能进行精确的检查操作。 因此,本发明允许检查升压电路输入端的电压。 由于另一个问题是升压电路在被致动之后在其操作稳定之前需要预定的时间,并且在此期间感测到的电压值不能提供准确的表示,本发明提供了对该输入的检查 当升压电路的运行变得稳定时,从升压电路的启动经过预定时间后开始电压。 因此,可以实现总是精确可靠的电池检查操作。
    • 13. 发明授权
    • Focus detecting and/or focus adjustment method
    • 聚焦检测和/或聚焦调整方法
    • US4647174A
    • 1987-03-03
    • US769795
    • 1985-08-26
    • Tokuichi TsunekawaKazuya HosoeTakao KinoshitaTakashi KawabataShinji SakaiTatsuya Taguchi
    • Tokuichi TsunekawaKazuya HosoeTakao KinoshitaTakashi KawabataShinji SakaiTatsuya Taguchi
    • G03B13/36G02B7/34G03B3/00
    • G02B7/346
    • 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.
    • 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。
    • 14. 发明授权
    • Focus detecting device
    • 对焦检测装置
    • US4346970A
    • 1982-08-31
    • US179548
    • 1980-08-19
    • Takashi KawabataTokuichi TsunekawaKazuya HosoeTakao KinoshitaShinji SakaiTatsuya Taguchi
    • Takashi KawabataTokuichi TsunekawaKazuya HosoeTakao KinoshitaShinji SakaiTatsuya Taguchi
    • G03B13/36G02B7/28G02B7/34G03B7/08
    • G02B7/346G02B7/28
    • 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.
    • 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。
    • 16. 发明授权
    • Focus detecting device
    • 对焦检测装置
    • US4560864A
    • 1985-12-24
    • US727194
    • 1985-04-29
    • Takao KinoshitaTakashi KawabataKazuya HosoeTokuichi TsunekawaToshio Sakane
    • Takao KinoshitaTakashi KawabataKazuya HosoeTokuichi TsunekawaToshio Sakane
    • G02B7/36G02B27/40G01J1/20
    • G02B7/36G02B27/40
    • 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.
    • 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。
    • 17. 发明授权
    • Focus detection system
    • 焦点检测系统
    • US4333716A
    • 1982-06-08
    • US98514
    • 1979-11-29
    • Toshio SakaneKazuya HosoeTokuichi TsunekawaTakao KinoshitaTakashi Kawabata
    • Toshio SakaneKazuya HosoeTokuichi TsunekawaTakao KinoshitaTakashi Kawabata
    • G03B13/36G01C3/32G02B7/38G03B7/099
    • G02B7/38G01C3/32
    • 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.
    • 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。