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91. 发明授权

US5363242A Zoom lens of rear focus type 失效
标题翻译：后焦距变焦镜头
公开(公告)号：US5363242A
公开(公告)日：1994-11-08
申请号：US62220
申请日：1993-05-18
申请人： Hideo Yokota
发明人： Hideo Yokota
IPC分类号： G02B13/18 , G02B15/16 , G02B15/173 , G02B15/14
CPC分类号： G02B15/173
摘要： A zoom lens of the rear focus type is disclosed, including, from front to rear, a first lens unit of positive refractive power, a second lens unit of negative refractive power, a third lens unit of positive refractive power and a fourth lens unit of positive refractive power, the second lens unit being moved toward the image side when zooming from the wide-angle end to the telephoto end, while moving the fourth lens unit to compensate for the image shift with zooming, and focusing being performed by moving the fourth lens unit. The third lens unit consists of a positive single lens having an aspheric surface. The fourth lens unit includes a negative first lens and a positive second lens, and at least one of lens surfaces of the the first and second lenses is aspherical. Letting the overall focal length of the third and fourth lens units in the wide-angle end be denoted by f3,4, the focal length of the entire lens system in the wide-angle end is denoted by Fw, the distance from the last lens surface to an image plane which is shortest in an entire zooming range when focusing on an infinitely distant object is denoted by Fb, and the zoom ratio denoted by Z, the following conditions are satisfied: ##EQU1##
摘要翻译：公开了一种后焦点类型的变焦透镜，包括从前到后的正屈光力的第一透镜单元，负折光力的第二透镜单元，正屈光力的第三透镜单元和第四透镜单元正屈光力，当从广角端到望远端变焦时，第二透镜单元朝向像侧移动，同时移动第四透镜单元以通过变焦补偿图像偏移，并且通过移动第四透镜单元来进行聚焦镜头单元。第三透镜单元由具有非球面的正单透镜组成。第四透镜单元包括负的第一透镜和正的第二透镜，并且第一和第二透镜的透镜表面中的至少一个是非球面的。将广角端的第三和第四透镜单元的整体焦距用f3,4表示，广角端的整个透镜系统的焦距由Fw表示，与最后一个透镜的距离在Fb和Z表示的缩放倍数表示满足以下条件时，在整个缩放范围内最短的图像平面，满足以下条件：2.2 <| Fb / Fw |

92. 发明授权

US4715692A Varifocal type finder 失效
标题翻译：变焦型取景器
公开(公告)号：US4715692A
公开(公告)日：1987-12-29
申请号：US653966
申请日：1984-09-24
申请人： Yasuyuki Yamada , Kazuo Fujibayashi , Yasuhisa Sato , Hideo Yokota
发明人： Yasuyuki Yamada , Kazuo Fujibayashi , Yasuhisa Sato , Hideo Yokota
IPC分类号： G03B13/10 , G02B7/10 , G02B15/04 , G02B23/14 , G03B13/06 , G03B13/26 , G02B15/02
CPC分类号： G02B15/04 , G02B23/145
摘要： In the disclosed finder, an auxiliary lens for changing the magnification power is inserted into the space between an objective lens and an eyepiece. The size of the viewfield frame is simultaneously changed to maintain a constant percentage of the viewfield of the finder. The required rate of change of magnification power that the auxiliary lens must attain to leave the size of the viewfield frame of the finder unchanged can be reduced with the advantage of minimizing the bulk and size of the finder.
摘要翻译：在所公开的取景器中，用于改变放大倍率的辅助透镜被插入到物镜和目镜之间的空间中。视场框架的大小同时改变，以维持取景器视场的百分比不变。可以通过使取景器的体积和尺寸最小化的优点来减少辅助透镜必须获得的使取景器的视场框架尺寸保持不变的所需的倍率变化率。

93. 发明授权

US4609272A Finder system of high image magnification 失效
标题翻译： Finder系统的高图像放大倍数
公开(公告)号：US4609272A
公开(公告)日：1986-09-02
申请号：US750685
申请日：1985-06-28
申请人： Hideo Yokota , Masatake Kato , Tetsuharu Nishimura
发明人： Hideo Yokota , Masatake Kato , Tetsuharu Nishimura
IPC分类号： G02B5/04 , G03B19/12 , G03B13/02
CPC分类号： G03B19/12 , G02B5/04
摘要： The disclosed finder system is constructed with three prisms. The first prism has a first entrance face, a first reflection face and a first exit face. The second prism has a second entrance face in contact with the first exit face, a second reflection face, and a second exit face. The third prism has a third entrance face in contact with the second exit face, a pair of roof-type reflection faces, a third reflection face in a common plane with the third entrance face, and a third exit face. Light entering through a photographic objective lens reflects from a quick return mirror to a focusing screen on which an image of an object forms. Light from the image reflects from the first reflection face to a direction parallel with an optical axis of the lens. The second reflection face then reflects the light progressively farther away from the optical axis to the pair of roof faces. The light then reflects progressively nearer the optical axis to the third reflection face, and then therefrom to an eyepiece for observing the finder image.
摘要翻译：所公开的取景器系统由三个棱镜构成。第一棱镜具有第一入射面，第一反射面和第一出射面。第二棱镜具有与第一出射面接触的第二入射面，第二反射面和第二出射面。第三棱镜具有与第二出射面接触的第三入射面，一对屋顶型反射面，与第三入射面在共同平面中的第三反射面和第三出射面。通过摄影物镜进入的光从快速返回镜反射到形成对象的图像的聚焦屏幕。来自图像的光从第一反射面反射到与透镜的光轴平行的方向。第二反射面然后将光逐渐远离光轴反射到一对屋顶面。然后，光逐渐靠近第三反射面的光轴，然后从那里反射到用于观察取景器图像的目镜。

94. 发明授权

US4596447A Conversion type varifocal lens system 失效
标题翻译：转换型变焦镜头系统
公开(公告)号：US4596447A
公开(公告)日：1986-06-24
申请号：US715590
申请日：1985-03-25
申请人： Yasuyuki Yamada , Yasuhisa Sato , Hideo Yokota
发明人： Yasuyuki Yamada , Yasuhisa Sato , Hideo Yokota
IPC分类号： G02B13/02 , G02B13/18 , G02B15/02 , G02B15/12 , G02B9/34
CPC分类号： G02B13/18 , G02B15/02
摘要： A conversion type varifocal lens system comprising a master lens which has a front assembly of positive power and a rear assembly of negative power, and a supplementary lens upon insertion into, or removal from, the space between the front and rear assemblies to change the focal length of the entire system.
摘要翻译：一种转换型变焦透镜系统，包括具有正功率的前组件和负功率的后组件的主镜头，以及当插入或移除前组件和后组件之间的空间时的辅助透镜，以改变焦点整个系统的长度。

95. 发明授权

US4592636A View finder optical system 失效
标题翻译：取景器光学系统
公开(公告)号：US4592636A
公开(公告)日：1986-06-03
申请号：US729292
申请日：1985-05-01
申请人： Masatake Kato , Tetsuharu Nishimura , Hideo Yokota
发明人： Masatake Kato , Tetsuharu Nishimura , Hideo Yokota
IPC分类号： G02B5/04 , G03B19/12 , G03B13/02
CPC分类号： G02B5/04 , G03B19/12
摘要： A view finder optical system comprises an optical path split mirror which divides a second optical axis from a first optical axis of an objective optical system; a predetermined image forming plane arranged on the second optical axis to have an image coming from the objective optical system formed thereon; a first prism arranged along the second optical axis to bring about reflection twice on the second optical axis and to have the incidence plane thereof and a second reflection plane on the same plane; a second prism which is disposed behind the first prism and is provided with a roof type reflection plane for a first reflection and a reflection plane for further reflecting the second optical axis after the second optical axis is reflected by the roof type reflection plane; and an eye-piece on the second optical axis after it comes out from the second prism. The spacing distance between the first optical axis and the optical axis passing through the eye-piece is shorter than a distance between the first optical axis and the predetermined image forming plane. An optical axis which passes through the exit plane of the first prism is arranged to be tilting to an axis which is perpendicular to the exit plane of the first prism.
摘要翻译：取景器光学系统包括将第二光轴与物镜光学系统的第一光轴分开的光路分离镜; 布置在所述第二光轴上以具有形成在其上的物镜光学系统的图像的预定图像形成平面; 沿所述第二光轴布置的第一棱镜，以在所述第二光轴上产生两次反射并具有其入射面和在同一平面上的第二反射面; 第二棱镜，其设置在第一棱镜后面，并且在第二光轴被屋顶型反射面反射之后，设置有用于第一反射的屋顶型反射面和用于进一步反射第二光轴的反射面; 以及在从第二棱镜出来之后的第二光轴上的眼睛片。第一光轴与通过眼睛片的光轴之间的距离比第一光轴和预定图像形成面之间的距离短。穿过第一棱镜的出射平面的光轴布置成垂直于第一棱镜的出射平面的轴倾斜。

96. 发明授权

US4104651A Focusing screen unit for single lens reflex camera 失效
标题翻译：聚焦屏幕单元用于单反相机
公开(公告)号：US4104651A
公开(公告)日：1978-08-01
申请号：US768417
申请日：1977-02-14
申请人： Seiichi Matsumoto , Mutsuhide Matsuda , Hideo Yokota
发明人： Seiichi Matsumoto , Mutsuhide Matsuda , Hideo Yokota
IPC分类号： G02B7/36 , G03B13/24 , G03B17/20 , G03B7/08
CPC分类号： G02B7/36 , G03B13/24 , G03B17/20
摘要： In an automatic focusing screen unit transparent photoelectric transducing means at a central portion of the image receiving surface area of a glass plate are capable of generating an output signal commensurate with the sharpness of an image formed thereon by an objective lens of a camera. An electrical circuit for processing the output signal of the transducing means produces an output during sharp focus. In a preferred embodiment, this circuit is constructed in the form of an integrated circuit chip for incorporation in the unit together with indicating means responsive to the output signal of the circuit for indicating a sharp focus condition.
摘要翻译：在自动聚焦屏幕单元中，玻璃板的图像接收表面区域的中心部分处的透明光电转换装置能够产生与由相机的物镜形成在其上的图像的清晰度相当的输出信号。用于处理转换装置的输出信号的电路在锐利对焦期间产生输出。在优选实施例中，该电路被构造成集成电路芯片的形式，用于与指示装置一起并入到指示装置中，该指示装置响应电路的输出信号以指示清晰的焦点状态。

97. 发明授权

US3978502A View-finder device for single lens reflex camera 失效
标题翻译：用于单镜头反射相机的查看器设备
公开(公告)号：US3978502A
公开(公告)日：1976-08-31
申请号：US513137
申请日：1974-10-08
申请人： Youichi Okuno , Hideo Yokota
发明人： Youichi Okuno , Hideo Yokota
IPC分类号： G03B17/20 , G03B19/12
CPC分类号： G03B19/12
摘要： The finder device forms the images of a plural number of photographing information indication bodies, provided on the exterior of the camera in a row extending in a direction other than parallel to one side edge of the focussing screen of the camera, in the neighborhood of the rectangular image of the focussing screen to extend in a row in a direction parallel to such side edge of the focussing screen and closely adjacent this side.

98. 发明授权

US3961178A Image sharpness detecting system and apparatus utilizing the same 失效
标题翻译：图像清晰度检测系统及利用其的装置
公开(公告)号：US3961178A
公开(公告)日：1976-06-01
申请号：US515849
申请日：1974-10-18
申请人： Kazuya Hosoe , Hiroshi Aizawa , Seiichi Matsumoto , Hideo Yokota
发明人： Kazuya Hosoe , Hiroshi Aizawa , Seiichi Matsumoto , Hideo Yokota
IPC分类号： G02B7/36 , G01J1/20 , H01J39/12
CPC分类号： G02B7/36
摘要： An image sharpness detecting system employing two photoconductive cells of different geometry which permits detection of an optimum degree of sharpness of an image formed thereon regardless of variation in the direction of light distribution of the image relative to the electrodes of the cells. Differences between light response characteristics of these two cells due to the different geometry thereof are compensated for by providing optical means such as filter arranged between the cells, whereby the system is made accurately and reliably responsive to variation of light distribution even at low total light levels.
摘要翻译：使用不同几何形状的两个光电导单元的图像锐度检测系统，其允许检测在其上形成的图像的最佳锐度锐度，而不管图像相对于单元电极的光分布方向的变化。通过提供诸如布置在单元之间的滤波器等光学装置来补偿这两个单元由于其不同几何形状的光响应特性之间的差异，由此即使在较低的总光线水平下，该系统也准确可靠地响应于光分布的变化。

99. 发明授权

US3937950A Focus defecting system 失效
标题翻译：焦点缺陷系统
公开(公告)号：US3937950A
公开(公告)日：1976-02-10
申请号：US459219
申请日：1974-04-08
申请人： Kazuya Hosoe , Seiichi Matsumoto , Hideo Yokota , Hiroshi Aizawa
发明人： Kazuya Hosoe , Seiichi Matsumoto , Hideo Yokota , Hiroshi Aizawa
IPC分类号： G03B13/36 , G02B7/36 , G01J1/20
CPC分类号： G02B7/36
摘要： A system for detecting the distinction of the object image characterized in that respectively on a photoelectric transducing element presenting electrodes on both extremities along the longer sides of a photoelectric semiconductor presenting considerably short sides as compared with the long sides and on a photoelectric transducing element presenting electrodes on both extremities along the shorter sides of a photoelectric semiconductor presenting considerably short sides as compared with the long sides an object image is formed by means of an optics and that the distinction of the above mentioned object image is detected by detecting the electric characteristics variable corresponding to the distinction of the above mentioned object image, of each of the above mentioned photoelectric transducing elements.
摘要翻译：一种用于检测对象图像的区别的系统，其特征在于，分别在光电转换元件上呈现与长边相比呈现相当短边的光电半导体的两侧的两端的电极和呈现电极的光电换能元件在与长边相比，通过光学元件形成物体图像的情况下，沿着具有相当短边的光电半导体的短边的两个末端上的物体图像，并且通过检测上述目标图像的电特性变量来检测上述目标图像的区别对上述光电转换元件的上述目标图像的区别。

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