公开(公告)号：US20070047096A1

公开(公告)日：2007-03-01

申请号：US11467668

申请日：2006-08-28

申请人： Takayuki ITO ,  Jun HIRAKAWA

发明人： Takayuki ITO ,  Jun HIRAKAWA

IPC分类号： G02B15/14

CPC分类号： G02B13/06 ,  G02B15/177

摘要： A fisheye lens system includes a negative first lens group and a positive second lens group, which are defined with respect to a maximum air-distance between lens elements constituting the fisheye lens system. The negative first lens group includes a first negative meniscus lens element having the convex surface facing toward the object, a second negative meniscus lens element having the convex surface facing toward the object, and a negative third lens element. The fisheye lens system satisfies the following conditions: 0.25

摘要翻译： 鱼眼镜头系统包括相对于构成鱼眼镜头系统的镜头元件之间的最大空气距离限定的负第一透镜组和正第二透镜组。 负第一透镜组包括具有朝向物体的凸表面的第一负弯月形透镜元件，具有朝向物体的凸表面的第二负弯月透镜元件和负第三透镜元件。 鱼眼镜头系统满足以下条件：0.25

公开(公告)号：US6002887A

公开(公告)日：1999-12-14

申请号：US959078

申请日：1997-10-28

申请人： Toru Chiba ,  Jun Hirakawa

发明人： Toru Chiba ,  Jun Hirakawa

IPC分类号： G02F1/13357 ,  G03B17/20 ,  G03B13/10

CPC分类号： G02F1/133615 ,  G03B17/20

摘要： In a view finder having an objective lens, an indicator is provided in the vicinity of an image forming position of the objective lens. The indicator includes a liquid crystal cell having a pair of spaced first and second glass substrates with transparent electrodes. A transparent macromolecular substance having a liquid crystal dispersed therein is enclosed in the space between the first and second glass substrates. An eyepiece is provided through which an image formed by the objective lens can be viewed. Light sources are provided along side surfaces of the indicator to emit and make light incident upon the indicator.

摘要翻译： 在具有物镜的取景器中，在物镜的图像形成位置附近设置指示器。 指示器包括具有一对具有透明电极的间隔开的第一和第二玻璃基板的液晶单元。 其中分散有液晶的透明大分子物质封入第一和第二玻璃基板之间的空间。 提供了可以看到由物镜形成的图像的目镜。 沿着指示器的侧表面提供光源以发射并使光入射到指示器上。

公开(公告)号：US5822132A

公开(公告)日：1998-10-13

申请号：US772251

申请日：1996-12-23

申请人： Jun Hirakawa

发明人： Jun Hirakawa

IPC分类号： G02B13/04 ,  G02B13/20 ,  G02B15/14

CPC分类号： G02B13/04 ,  G02B13/20

摘要： A soft focus lens which is designed as a retrofocus type lens, comprises a front lens group having a negative power, a rear lens group having positive power, and a diaphragm located within the rear lens group. The front and rear lens groups are arranged in this order from an object side. In particular, the soft focus lens satisfies the following conditions; SAU/f

摘要翻译： 被设计为反焦型透镜的软焦点透镜包括具有负光焦度的前透镜组，具有正光焦度的后透镜组和位于后透镜组内的光阑。 前后透镜组从物体侧依次排列。 特别地，柔焦镜透镜满足以下条件： SAU / f <-0.10（1）f / fF <-0.5（2）其中SAU是全开孔径处的球面像差，f是整个透镜系统的焦距，fF是前透镜组的焦距。

公开(公告)号：US4836663A

公开(公告)日：1989-06-06

申请号：US247145

申请日：1988-09-21

申请人： Jun Hirakawa

发明人： Jun Hirakawa

IPC分类号： G02B15/20 ,  G02B15/173

CPC分类号： G02B15/173

摘要： A telephoto zoom lens system of a four-group composition that is capable of producing a high zoom ratio without increasing the complexity of a diaphragm stop mechanism and which yet is made compact in structure without sacrificing performance. The telephoto zoom lens system is composed, in order from the object side, of a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power together with a diaphragm stop provided for adjusting the quantity of light admitted, and a fourth lens group having a positive refractive power which consists of lens unit IVA having a positive refractive power and lens unit IVB having a negative refractive power. This lens system performs zooming by moving the first, second and fourth lens groups along the optical axis with the third lens group being fixed and performs focusing by moving the first lens group along the optical axis.

摘要翻译： 一种四组组合的长焦变焦透镜系统，其能够产生高变焦比，而不增加光阑停止机构的复杂性，并且其结构紧凑而不牺牲性能。 长焦变焦透镜系统从物体侧依次构成具有正折光力的第一透镜组，具有负折光力的第二透镜组，具有正折光力的第三透镜组以及隔膜止动件 用于调节所允许的光量，以及由具有正折光力的透镜单元IVA和具有负屈光力的透镜单元IVB组成的具有正折光力的第四透镜组。 该透镜系统通过沿着光轴移动第一透镜组，第二透镜组和第四透镜组而使第三透镜组固定，并且通过沿着光轴移动第一透镜组来进行聚焦来进行变焦。

公开(公告)号：US4747676A

公开(公告)日：1988-05-31

申请号：US45990

申请日：1987-05-04

申请人： Jun Hirakawa

发明人： Jun Hirakawa

IPC分类号： G02B9/64 ,  G02B13/04

CPC分类号： G02B9/64 ,  G02B13/04

摘要： A wide-angle lens system of the seven-unit-seven-element configuration. Arranged in ordered from the object side are two opposed negative meniscus lenses, two opposed positive lenses, a negative lens and two lens with opposed convex surfaces. Four required and one optional numerical conditions are imposed on the focal length, radius of curvature, Abbe numbers and refractive indices.

摘要翻译： 7单元七元配置的广角镜头系统。 从物体侧排列的是两个相对的负弯月透镜，两个相对的正透镜，负透镜和具有相对凸面的两个透镜。 对焦距，曲率半径，阿贝数和折射率施加四个必要的和一个可选的数值条件。

公开(公告)号：US20100073777A1

公开(公告)日：2010-03-25

申请号：US12558767

申请日：2009-09-14

申请人： Jun HIRAKAWA

发明人： Jun HIRAKAWA

IPC分类号： G02B15/14 ,  G02B9/64

CPC分类号： G02B9/64 ,  G02B13/16

摘要： A photographic lens system includes a positive lens element, a positive lens element, a negative lens element having a concave surface facing toward the image, a diaphragm, a negative lens element having a concave surface facing toward the object, a positive lens element which is cemented to the negative lens element, and two or three positive lens elements, in this order from the object. An intermediate negative lens element, having the weakest negative refractive power out of all of the negative lens elements, is provided between the negative lens element having the concave surface facing toward the image and the negative lens element having the concave surface facing toward the object.

摘要翻译： 摄影透镜系统包括正透镜元件，正透镜元件，具有面向图像的凹面的负透镜元件，光阑，具有朝向物体的凹面的负透镜元件，正透镜元件， 胶合到负透镜元件，以及两个或三个正透镜元件，从该物体的顺序。 在具有面向图像的凹面的负透镜元件和具有面向物体的凹面的负透镜元件之间，设置具有所有负透镜元件中最弱的负折光力的中间负透镜元件。

公开(公告)号：US07808723B2

公开(公告)日：2010-10-05

申请号：US12558767

申请日：2009-09-14

申请人： Jun Hirakawa

发明人： Jun Hirakawa

IPC分类号： G02B9/64 ,  G02B9/00 ,  G02B15/14

CPC分类号： G02B9/64 ,  G02B13/16

摘要： A photographic lens system includes a positive lens element, a positive lens element, a negative lens element having a concave surface facing toward the image, a diaphragm, a negative lens element having a concave surface facing toward the object, a positive lens element which is cemented to the negative lens element, and two or three positive lens elements, in this order from the object. An intermediate negative lens element, having the weakest negative refractive power out of all of the negative lens elements, is provided between the negative lens element having the concave surface facing toward the image and the negative lens element having the concave surface facing toward the object.

摘要翻译： 摄影透镜系统包括正透镜元件，正透镜元件，具有面向图像的凹面的负透镜元件，光阑，具有朝向物体的凹面的负透镜元件，正透镜元件， 胶合到负透镜元件，以及两个或三个正透镜元件，从该物体的顺序。 在具有面向图像的凹面的负透镜元件和具有面向物体的凹面的负透镜元件之间，设置具有所有负透镜元件中最弱的负折光力的中间负透镜元件。

公开(公告)号：US07317581B2

公开(公告)日：2008-01-08

申请号：US11467668

申请日：2006-08-28

申请人： Takayuki Ito ,  Jun Hirakawa

发明人： Takayuki Ito ,  Jun Hirakawa

IPC分类号： G02B15/14 ,  G02B13/04

CPC分类号： G02B13/06 ,  G02B15/177

摘要： A fisheye lens system includes a negative first lens group and a positive second lens group, which are defined with respect to a maximum air-distance between lens elements constituting the fisheye lens system. The negative first lens group includes a first negative meniscus lens element having the convex surface facing toward the object, a second negative meniscus lens element having the convex surface facing toward the object, and a negative third lens element.

摘要翻译： 鱼眼镜头系统包括相对于构成鱼眼镜头系统的镜头元件之间的最大空气距离限定的负第一透镜组和正第二透镜组。 负第一透镜组包括具有朝向物体的凸表面的第一负弯月形透镜元件，具有朝向物体的凸表面的第二负弯月透镜元件和负第三透镜元件。

公开(公告)号：US20050237627A1

公开(公告)日：2005-10-27

申请号：US11111864

申请日：2005-04-22

申请人： Jun Hirakawa

发明人： Jun Hirakawa

IPC分类号： G02B13/04 ,  G02B9/12 ,  G02B13/06 ,  G02B15/14 ,  G02B15/177

CPC分类号： G02B13/06 ,  G02B15/177

摘要： A wide-angle lens system includes a negative first lens group, a negative second lens group, and a positive third lens group. The negative first lens group includes at least two negative meniscus lens elements each having the convex surface facing toward the object, and a positive lens element provided on the image-side of the two negative meniscus lens elements. The negative second lens group includes cemented lens elements and a negative meniscus lens element having the convex surface facing toward the object. The wide-angle lens system satisfies the following conditions: f2-3/f>1.6  (1) f3/f>1.5  (2) (f2-3/f)/(f3/f)>1.0  (3) wherein f2-3 designates the combined focal length of the negative second lens group and the positive third lens group; f designates the focal length of the entire wide-angle lens system; and f3 designates the focal length of the positive third lens group.

摘要翻译： 广角透镜系统包括负第一透镜组，负第二透镜组和正第三透镜组。 负的第一透镜组包括至少两个具有朝向物体的凸面的负弯月形透镜元件，以及设置在两个负弯月形透镜元件的像侧上的正透镜元件。 负第二透镜组包括胶合透镜元件和具有朝向物体的凸表面的负弯月透镜元件。 广角镜头系统满足以下条件：<？in-line-formula description =“In-line formula”end =“lead”？> f> 2-3 ）<？in-line-formula description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“In-line formula”end =“lead”？> f < / f> 1.5（2）<？in-line-formula description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“In-line formula”end = （f 3/3 / f）/（f 3/3 / f）> 1.0（3）<？in-line-formula description =“In 其中f 2-3表示负第二透镜组和正第三透镜组的组合焦距; f表示整个广角镜头系统的焦距; 并且f 3 3表示正第三透镜组的焦距。

公开(公告)号：US5717532A

公开(公告)日：1998-02-10

申请号：US650882

申请日：1996-10-30

申请人： Toru Chiba ,  Masaki Shimizu ,  Jun Hirakawa

发明人： Toru Chiba ,  Masaki Shimizu ,  Jun Hirakawa

IPC分类号： B29D11/00 ,  G02B5/10 ,  G02B5/08

CPC分类号： G02B5/10 ,  B29D11/00596

摘要： Reflection-type compound optical elements include a substrate, an aspherical resin layer and a high reflectance layer. The substrate, the aspherical layer and the high reflectance layer are laminated in an optional order to form a laminate structure.

摘要翻译： 反射型复合光学元件包括基板，非球面树脂层和高反射层。 基板，非球面层和高反射层以任意的顺序层叠以形成层叠结构。