公开(公告)号：US07262805B2

公开(公告)日：2007-08-28

申请号：US10358239

申请日：2003-02-05

申请人： Satoshi Yahagi ,  Tadashi Sasaki

发明人： Satoshi Yahagi ,  Tadashi Sasaki

IPC分类号： H04N5/232

CPC分类号： G02B7/36 ,  H04N5/23209 ,  H04N5/23212

摘要： A focus detecting system for determining the focus state of an imaging lens, such as a camera lens, is disclosed. Object light not forming an image for image production is deflected along an optical axis through a relay lens to a focus state detection unit that includes image detecting elements with light receiving surfaces that are equidistant in front of and behind a position conjugate with a light receiving surface for image production. Either the relay lens or the focus state detection unit is moveable along the optical axis to vary how far the light receiving surfaces are out of focus. A diaphragm opening of the imaging lens determines if and by how much the relay lens and focus state detection unit are relatively moved. Evaluation values of the out of focus amount are compared in order to control focusing of the imaging lens.

摘要翻译： 公开了一种用于确定诸如照相机镜头的成像透镜的焦点状态的焦点检测系统。 不形成用于图像产生的图像的物体光沿着光轴通过中继透镜偏转到焦点状态检测单元，该焦点状态检测单元包括具有与受光面共轭的位置前后等距的光接收表面的图像检测元件 用于图像制作。 中继透镜或焦点状态检测单元可以沿着光轴移动以改变光接收表面离焦的距离。 成像透镜的光圈开口决定中继透镜和聚焦状态检测单元是否相对移动多少。 比较对焦量的评价值，以便控制成像透镜的聚焦。

公开(公告)号：US20080198259A1

公开(公告)日：2008-08-21

申请号：US12081068

申请日：2008-04-10

申请人： Tadashi Sasaki ,  Atsushi Kanayama ,  Satoshi Yahagi

发明人： Tadashi Sasaki ,  Atsushi Kanayama ,  Satoshi Yahagi

IPC分类号： H04N5/232 ,  G03B13/36

CPC分类号： H04N5/23209 ,  H04N5/23212

摘要： The auto focus system obtains focus information on a lens-interchangeable camera body of a TV camera and sends the focus information to a lens apparatus mounted on the camera body. The lens apparatus controls an auto focus based on the focus information. It is thereby possible to control the focus on adequate conditions according to optical specifications of the lens apparatus and so on.

摘要翻译： 自动对焦系统获取电视摄像机的镜头可互换相机主体上的焦点信息，并将焦点信息发送到安装在照相机主体上的透镜装置。 透镜装置基于焦点信息来控制自动对焦。 因此，可以根据透镜装置的光学规格等将焦点控制在适当的条件上。

公开(公告)号：US06809883B2

公开(公告)日：2004-10-26

申请号：US10358294

申请日：2003-02-05

申请人： Satoshi Yahagi ,  Tadashi Sasaki

发明人： Satoshi Yahagi ,  Tadashi Sasaki

IPC分类号： G02B738

CPC分类号： H04N5/23212 ,  G02B7/282 ,  G02B7/285 ,  G02B7/343 ,  G02B15/14

摘要： An autofocus system for an imaging device that includes an image detecting element for image production at a focused image plane of an adjustable focus imaging lens that also includes four image detecting elements for focus detection arranged in pairs that are equidistant in front of, and behind, planes that are conjugate with the focused image plane. One pair of image detecting elements for focus detection are farther than the other pair from the conjugate planes and may be used alone for focusing based on the stop value or focal length of the adjustable focus imaging lens. Alternatively, the other pair of image detecting elements may be used for more accurate focusing after the one pair of image detecting elements is used. The use of two pairs of image detecting elements at different distances from the focused image plane provides accurate focusing over a wide range of object distances.

摘要翻译： 一种用于成像装置的自动对焦系统，其包括用于在可调节聚焦成像透镜的聚焦图像平面处进行图像生成的图像检测元件，该可调节聚焦成像透镜还包括用于焦点检测的四个图像检测元件，其成对设置成等距离在前后方向上， 与聚焦图像平面共轭的平面。 用于焦点检测的一对图像检测元件比来自共轭平面的另一对图像检测元件更远，并且可以基于可调节聚焦成像透镜的停止值或焦距单独用于聚焦。 或者，另一对图像检测元件可以在使用一对图像检测元件之后用于更精确的聚焦。 使用距离聚焦图像平面不同距离的两对图像检测元件在宽范围的物体距离上提供精确的聚焦。

公开(公告)号：US06822801B2

公开(公告)日：2004-11-23

申请号：US10479492

申请日：2003-12-03

申请人： Satoshi Yahagi ,  Masao Wada ,  Tetsuji Inoue ,  Ryoji Kumaki ,  Shinobu Nakamura ,  Haruo Tominaga ,  Hiroyuki Horiguchi ,  Hideaki Sugiura ,  Masayuki Sugawara

发明人： Satoshi Yahagi ,  Masao Wada ,  Tetsuji Inoue ,  Ryoji Kumaki ,  Shinobu Nakamura ,  Haruo Tominaga ,  Hiroyuki Horiguchi ,  Hideaki Sugiura ,  Masayuki Sugawara

IPC分类号： G02B2714

CPC分类号： G02B7/36 ,  H04N5/23212

摘要： A beam splitter (24)for splitting light in a wavelength range of about 500 nm to about 600 nm is arranged in a relay optical system of a taking lens (12). A green light beam reflected from the beam splitter (24) is directed through a relay lens (R3) to a focusing state determination imaging unit (26). The imaging unit (26) comprises three imaging elements (A, B, C) for capturing the directed green light beam to determine the focusing state. Thus, a device for determining the focusing state of the taking lens is provided, in which the green light beam is separated as an object light for determining the focusing state from the object light entering the taking lens (12), so that the focusing state can be determined with high accuracy on the basis of the high-frequency components of the image signal generated by capturing the green light beam by means of the imaging elements (A, B, C) having different optical path lengths.

摘要翻译： 用于在约500nm至约600nm的波长范围内分裂光的分束器（24）布置在拍摄镜头（12）的中继光学系统中。 从分束器（24）反射的绿色光束被引导通过中继透镜（R3）到聚焦状态确定成像单元（26）。 成像单元（26）包括用于捕获定向绿色光束以确定聚焦状态的三个成像元件（A，B，C）。 因此，提供了一种用于确定拍摄镜头的聚焦状态的装置，其中将绿色光束作为目标光分离，以便从进入拍摄镜头（12）的物体光确定聚焦状态，使得聚焦状态 可以基于通过具有不同光程长度的摄像元件（A，B，C）捕获绿色光束而产生的图像信号的高频分量来高精度地确定。

公开(公告)号：US6014268A

公开(公告)日：2000-01-11

申请号：US24265

申请日：1998-02-17

申请人： Satoshi Yahagi

发明人： Satoshi Yahagi

IPC分类号： G02B13/18 ,  G02B15/16 ,  G02B15/177 ,  G02B15/14

CPC分类号： G02B15/177

摘要： An inexpensive, high performance zoom lens includes, as measured from the object side, a negative first lens group and a positive second lens group. The overall length of the zoom lens is reduced by making one of the lens element surfaces of the first lens group G.sub.1 aspherical. A lens element in the second lens group is designed to be a biconvex lens with the same absolute value of radii of curvature, to thereby make the zoom lens inexpensive to produce and assemble.

摘要翻译： 从物体侧测量的廉价的高性能变焦透镜包括负的第一透镜组和正的第二透镜组。 通过使第一透镜组G1的透镜元件表面中的一个非球面来缩小变焦透镜的总长度。 第二透镜组中的透镜元件被设计为具有相同的半径曲率绝对值的双凸透镜，从而使得变焦透镜便宜地生产和组装。

公开(公告)号：US5657170A

公开(公告)日：1997-08-12

申请号：US621845

申请日：1996-03-25

申请人： Satoshi Yahagi ,  Akiko Takatsuki

发明人： Satoshi Yahagi ,  Akiko Takatsuki

IPC分类号： G02B9/30 ,  G02B9/34 ,  G02B9/00

CPC分类号： G02B9/34

摘要： A photographic lens apparatus secures a sufficiently large back focus while sufficiently distancing the exit pupil position from the image-forming surface. From the object side along an optical axis L, a stop, a first lens, a second lens, a third lens having a meniscus form, and a fourth lens group, in which a lens having a negative refractive power and a lens having a positive refractive power are cemented together to yield a positive refractive power, are successively disposed. Refractive index n.sub.1 and abbe number .nu..sub.1 of the first lens, abbe number .nu..sub.2 of the second lens, radius of curvature r.sub.7 of the surface facing the object and radius of curvature r.sub.8 of the surface facing the image in the third lens, abbe number .nu..sub.4 of the lens having the negative refractive power and abbe number .nu..sub.5 of the lens having the positive refractive power in the fourth lens group, focal length f.sub.45 of the fourth lens group, and entire focal length f of the whole lens system satisfy the conditions 1.7

摘要翻译： 摄影透镜设备确保足够大的后焦距，同时充分地将出射光瞳位置与图像形成表面间隔开。 从物体侧沿着光轴L，具有弯折形状的光阑，第一透镜，第二透镜，第三透镜​​和第四透镜组，其中具有负折光力的透镜和具有正的折射率的透镜 屈光力被粘合在一起以产生正的屈光力，被依次设置。 第一透镜的折射率n1和阿贝数nu 1，第二透镜的阿贝数nu 2，面向物体的表面的曲率半径r7和第三透镜中面向图像的表面的曲率半径r8，阿贝数 具有第四透镜组的具有正折光力的透镜的负折光力的透镜的nu 4和第四透镜组的焦距f45以及整个透镜系统的整个焦距f满足了 条件1.7

公开(公告)号：US5459615A

公开(公告)日：1995-10-17

申请号：US80103

申请日：1993-06-23

申请人： Satoshi Yahagi

发明人： Satoshi Yahagi

IPC分类号： G02B9/64 ,  G02B15/02 ,  G02B15/14

CPC分类号： G02B15/02

摘要： A miniature fixed-focal-length lens system includes a lens group which consists of a plurality of lenses and has a positive refracting power and a stop disposed on the object side of the lens group. The lens nearest to the object in the lens group is a meniscus lens which is concave to front and has a positive refracting power and the lens remotest from the object in the lens group is a lens which is convex to rear and has a positive refracting power.

摘要翻译： 微型固定焦距透镜系统包括由多个透镜组成并且具有正折射力的透镜组和设置在透镜组的物体侧上的光阑。 透镜组中最接近物体的透镜是凹入到前面并且具有正折射力的弯月透镜，并且透镜组中的物体偏离的透镜是凸到后的透镜，具有正折射力 。

公开(公告)号：US20070230935A1

公开(公告)日：2007-10-04

申请号：US11730376

申请日：2007-03-30

申请人： Satoshi Yahagi

发明人： Satoshi Yahagi

IPC分类号： G03B13/00

CPC分类号： G02B7/36 ,  G02B7/08 ,  G02B7/102 ,  G02B15/173 ,  H04N5/23212

摘要： An autofocus adapter is provided and includes an imaging adapter optical system placed on an optical axis of an imaging lens when the autofocus adapter is attached, and a focus state detection adapter optical system placed on an optical axis different from the optical axis of the imaging lens when the autofocus adapter is attached. The imaging adapter optical system has a light split prism for splitting subject light passing through the imaging lens into imaging subject light and the focus state detection subject light, a first lens group having a negative power as a whole and placed on the object side with respect to the light split prism, and a second lens group having a positive power as a whole and placed on the image side with respect to the light split prism. The focus state detection adapter optical system has a positive lens group having the same lens configuration as the second lens group in the imaging adapter optical system.

摘要翻译： 提供自动对焦适配器，并且当安装自动对焦适配器时，包括放置在成像透镜的光轴上的成像适配器光学系统，以及放置在与成像透镜的光轴不同的光轴上的聚焦状态检测适配器光学系统 当连接自动对焦适配器时。 成像适配器光学系统具有：光分离棱镜，用于将通过成像透镜的被摄体光分解为成像对象光和聚焦状态检测对象光，第一透镜组作为整体具有负电力并且相对于物体侧放置在物体侧 并且相对于分光棱镜放置在像侧的整体上具有正电力的第二透镜组。 焦点状态检测适配器光学系统具有与成像适配器光学系统中的第二透镜组相同的透镜构造的正透镜组。

公开(公告)号：US5808809A

公开(公告)日：1998-09-15

申请号：US873400

申请日：1997-06-12

申请人： Satoshi Yahagi

发明人： Satoshi Yahagi

IPC分类号： G02B15/20 ,  G02B15/17 ,  G02B15/173 ,  G02B15/14

CPC分类号： G02B15/173

摘要： A second lens group is divided into a negative second A lens group and a positive second B lens group, and the distance between the second A and B lens groups is made variable so as to correct a fluctuation in aberration caused by a change in focal length, thereby reducing the size and weight of the whole lens system, while the fluctuation in performance is kept low in the whole zoom range and whole focus range. The second lens group is constituted by the second A lens group having a negative refracting power and the second B lens group having a positive refracting power. Upon a change in focal length, the distance between the second A and B lens groups is altered so as to suppress the fluctuation in aberration mainly in a middle range. Namely, in the second lens group having the highest refracting power, a surface spacing highly sensitive to the change in aberration is altered, whereby the aberration can be corrected with a favorable balance. Specifically, as indicated by the moving loci in FIG. 1, during the movement from the wide angle end to the telephoto end, the second A and second B lens groups are moved such that the distance therebetween is narrowed in the middle range.

摘要翻译： 第二透镜组被分成负第二A透镜组和正第二B透镜组，并且使第二A和B透镜组之间的距离可变，以便校正由焦距变化引起的像差波动 从而减小整个透镜系统的尺寸和重量，而在整个变焦范围和整个焦距范围内性能波动保持较低。 第二透镜组由具有负折射力的第二A透镜组和具有正折射光焦度的第二B透镜组构成。 当焦距变化时，改变第二A和B透镜组之间的距离，以便主要在中间范围内抑制像差的波动。 也就是说，在具有最高折射力的第二透镜组中，改变了对像差变化高度敏感的表面间隔，从而可以以良好的平衡来校正像差。 具体地，如图1中的移动轨迹所示。 如图1所示，在从广角端到望远端的移动期间，移动第二A和B透镜组，使得它们之间的距离在中间范围内变窄。

公开(公告)号：US5760966A

公开(公告)日：1998-06-02

申请号：US621947

申请日：1996-03-25

申请人： Takashi Tanaka ,  Satoshi Yahagi

发明人： Takashi Tanaka ,  Satoshi Yahagi

IPC分类号： G02B13/18 ,  G02B15/00 ,  G02B15/16 ,  G02B15/173 ,  G02B15/14

CPC分类号： G02B15/173

摘要： In five constituent lens groups, the fourth lens group from the object side is made as a negative lens. This fourth lens group is moved in order to correct zooming and focusing, while predetermined conditional expressions are satisfied, thereby yielding a zoom lens which can attain a wide angle, a large zoom ratio, and favorable aberrations. This zoom lens has five groups respectively composed of positive, negative, positive, negative, and positive lens groups. At the time of zooming, the first, third, and fifth lens groups G1, G3, and G5 are fixed, while the second and fourth lens groups G2 and G4 are made movable. As the second lens group G2 is moved in the optical axis direction, the focal length of the whole system is changed. As the fourth lens group G4 is moved in the optical axis direction, fluctuation in imaging position is corrected while change in the imaging position due to change in object distance is corrected. This zoom lens is further configured so as to satisfy the following conditional expressions (1) to (3): 0.9

摘要翻译： 在五个构成透镜组中，从物体侧的第四透镜组被制成负透镜。 为了校正变焦和聚焦，移动第四透镜组，同时满足预定的条件表达式，从而产生可以获得广角，大的变焦比和有利的像差的变焦透镜。 该变焦镜头具有分别由正，负，正，负和正透镜组组成的五组。 在变焦时，第一，第三和第五透镜组G1，G3和G5是固定的，而第二和第四透镜组G2和G4是可移动的。 当第二透镜组G2沿光轴方向移动时，整个系统的焦距被改变。 当第四透镜组G4沿光轴方向移动时，校正成像位置的波动，同时由于对象距离的变化而导致的成像位置的变化被校正。 该变焦透镜进一步配置成满足以下条件表达式（1）至（3）：0.9