公开(公告)号：US20110043926A1

公开(公告)日：2011-02-24

申请号：US12823425

申请日：2010-06-25

申请人： Dayong Li

发明人： Dayong Li

IPC分类号： G02B15/14

CPC分类号： G02B15/173

摘要： A zoom lens includes, sequentially from an object side, a positive first lens group; a negative second lens group; a positive third lens group; and a positive fourth lens group, where 2.0≦D23W/FW≦3.0 is satisfied. D23W is an interval, at a wide angle edge, between a lens that among lenses of the second lens group, is farthest on an imaging plane side and a lens that among lenses of the third lens group, is farthest on the object side. FW is a focal length of an optical system of the zoom lens at infinity focus, at the wide angle edge.

摘要翻译： 变焦透镜从物体侧顺序地包括正的第一透镜组; 负第二透镜组; 正第三透镜组; 和正的第四透镜组，其中满足2.0＆nlE; D23W / FW＆nlE; 3.0。 D23W是在第二透镜组的透镜中的成像平面侧最远的透镜与第三透镜组的透镜之间的透镜在物体侧最远的透镜之间的广角边缘处的间隔。 FW是变焦镜头的光学系统在无限远焦点处的广角角度的焦距。

公开(公告)号：US20100259834A1

公开(公告)日：2010-10-14

申请号：US12662355

申请日：2010-04-13

申请人： Dayong Li ,  Hiroshi Yamamoto ,  Hiroki Harada

发明人： Dayong Li ,  Hiroshi Yamamoto ,  Hiroki Harada

IPC分类号： G02B15/14

CPC分类号： G02B15/177

摘要： The present invention is directed to wide-angle zoom lenses dedicated to single-lens reflex digital cameras, which attains zoom ratio greater than 2. Such a wide-angle zoom lens has four groups of lens pieces, namely comprising the leading or foremost 1st lens group of negative refractivity closest to an objective field, the succeeding 2nd lens group of positive refractivity, the third lens group of negative refractivity, and the trailing 4th lens group of positive refractivity arranged in this order to move each lens group to vary optical power; and the 1st lens group includes a front subset of the lens pieces of negative refractive power and a rear subset of negative refractive power. The front-end lens piece in the 1st lens group is shaped in negative meniscus lens that has its concave surface faced toward an imaging plane and has the opposite surfaces shaped aspherical. The front and rear subsets of the 1st lens group meet requirements of a focal length as expressed in the following formula: 3.5≦|f1b/f1a|≦6.0 where f1a is a focal length of the front subset of the lens pieces in the 1st lens group and f1b is the focal length of the rear subset in the 1st lens group.

摘要翻译： 本发明涉及专用于单镜头反光数码相机的广角变焦镜头，其获得大于2的变焦比。这种广角变焦镜头具有四组透镜片，即包括前面或最前面的第一透镜 最接近目标场的负折射率组，正折射率的后续第二透镜组，负折射率的第三透镜组和正折射率的后第四透镜组按顺序排列以移动每个透镜组以改变光焦度; 并且第一透镜组包括负屈光力透镜片的前子集和负屈光力的后子集。 第一透镜组中的前端透镜片成形为负弯月形透镜，其凹面朝向成像平面并且具有相对的非球面形状。 第一透镜组的前后子集满足以下公式表示的焦距要求：3.5＆nlE; | f1b / f1a |＆nlE; 6.0其中f1a是透镜片的前部子集的焦距 第一透镜组和f1b是第一透镜组中后部子集的焦距。

公开(公告)号：US07773308B2

公开(公告)日：2010-08-10

申请号：US12320464

申请日：2009-01-27

申请人： Yuichi Muramatsu ,  Dayong Li

发明人： Yuichi Muramatsu ,  Dayong Li

IPC分类号： G02B15/14

CPC分类号： G02B15/177

摘要： The present invention is directed to a wide-angle zoom lens that attains the field of view ranging from 80 to 115 degrees in field angle with the zooming power of 2× or even higher, and that is capable of approximately compensating for various types of aberration such as spherical aberration, aberration of distortion, astigmatism and the like. The wide-angle zoom lens of multi groups of lens pieces, namely, a 1st lens group of negative refractivity, a 2nd lens group of negative refractivity, and a 3rd lens group of positive refractivity varies the power from the wide-angle end to the telephoto end with the 1st and 2nd lens groups coming closer to each other, and the 2nd and 3rd lens groups being varied in interval therebetween. The zoom lens attains the widest field of view of 80 degrees or over in field angle in the relations as expressed in the following formula: 2.0

摘要翻译： 本发明涉及一种广角变焦镜头，其能够以2×或更高的变焦倍率获得视场角为80度至115度的视场，并且能够近似补偿各种像差 例如球面像差，畸变畸变，像散等。 多组透镜片的广角变焦镜头，即负折射率的第一透镜组，负折射率的第二透镜组和正折射率的第三透镜组将功率从广角端变为 长焦端与第一和第二透镜组彼此靠近，第二和第三透镜组之间的间隔变化。 变焦透镜在如下公式所示的关系中达到80度或以上的最宽视场：2.0

公开(公告)号：US11598947B2

公开(公告)日：2023-03-07

申请号：US17268085

申请日：2019-07-10

申请人： Sumita Optical Glass, Inc. ,  Dayong Li

发明人： Hiroki Watanabe ,  Morito Kanke ,  Shotaro Sano ,  Jun Otake ,  Dayong Li

IPC分类号： G02B23/24 ,  G02B7/02

摘要： A relay optical system 20 for a rigid endoscope includes a lens fixing frame 21 and a plurality of lenses 22. The lens fixing frame 21 has a plurality of tubular bodies 26. The plurality of tubular bodies 26 are joined coaxially to each other. The plurality of lenses 22 are located at positions other than a joint position jp of the tubular bodies 26 in an axis direction of the lens fixing frame 21. The plurality of lenses 22 are located in the lens fixing frame 21 so as to have a coincident optical axis. The plurality of lenses 22 do not include a cemented lens.

公开(公告)号：US08049968B2

公开(公告)日：2011-11-01

申请号：US12318515

申请日：2008-12-30

申请人： Hisayuki Yamanaka ,  Dayong Li

发明人： Hisayuki Yamanaka ,  Dayong Li

IPC分类号： G02B15/14

CPC分类号： G02B15/173

摘要： The invention is directed to inner-focusing zoom lenses that include multi groups of lens pieces, namely, the first lens group or the leading lens group of positive refractivity, the second lens group of negative refractivity, and the remaining trailing groups of positive refractivity, as a whole. At least one group of positive refractivity among the trailing groups includes two or more negative lens pieces, at least one of which is connected on its surface to another lens piece to form a duplicated composite lens so that the junction between two of them functions to diverge incident beams. Assuming now that a sum of the refractivities of all the junctions of the composite lenses can be expressed as Σφ=Σ|(N1−N2)/R| where N1 and N2 are refractivities that substances before and after the junction of the composite lenses respectively have, R is a radius of curvature of the junction, ft is a focal length of the comprehensive lens optics of the zoom lens at the telephoto end.

摘要翻译： 本发明涉及内聚焦变焦透镜，其包括多组透镜片，即具有正折射率的第一透镜组或前透镜组，负折射率的第二透镜组和正折射率的剩余拖尾组， 作为一个整体。 拖尾组中的至少一组正折射率包括两个或更多个负透镜片，其中至少一个在其表面上连接到另一透镜片以形成复制的复合透镜，使得它们中的两个之间的连接起分支作用 入射光束。 现在假设复合透镜的所有接头的折射率之和可以表示为＆Sgr; |（N1-N2）/ R | 其中N1和N2是复合透镜的接合之前和之后的物质的折射率，R是连接点的曲率半径，ft是变焦透镜在望远端的综合透镜光学元件的焦距。

公开(公告)号：US20110216425A1

公开(公告)日：2011-09-08

申请号：US13108619

申请日：2011-05-16

申请人： Dayong Li ,  Toru Nara

发明人： Dayong Li ,  Toru Nara

IPC分类号： G02B15/14

CPC分类号： G02B15/173 ,  G02B27/646

摘要： The present invention is directed to high magnification compact zoom lenses that are reduced in diameter of groups of lens pieces closer to the imaging plane to provide downsized lightweight zoom lenses of magnification as high as 20 diameters, with an image stabilizer or vibration compensating mechanism being also reduced in dimensions. An exemplary improved high magnification zoom lens has four groups of lens pieces, namely, the first or leading lens group G1 of positive refractivity in the foremost position closer to the subject, the second lens group G2 of negative refractivity, the third lens group G3 of positive refractivity, and the fourth lens group G4 of positive refractivity in the rearmost position closer to the imaging plane, all arranged in this order. In displacing the entire lens optics of the zoom lens from the wide-angle end to the telephoto end, the second lens group G2 are moved toward the imaging plane and the fourth lens group G4 are moved to compensate for a varied position of the resultant image while the first and third lens groups, G1 and G3, have their respective positions fixed along the optical axis. The zoom lens satisfies the requirements as defined in the following formulae: f3/f4>2.0 and v4>65 where f3 is a focal length of the third lens group G3, f4 is the focal length of the fourth lens group, v4 is an average of Abbe contrasts of all the convex lens pieces in the fourth lens group G4.

摘要翻译： 本发明涉及一种高倍率小型变焦镜头，其减小了靠近成像平面的镜片组的直径，以提供高达20个直径的放大倍率的小型化轻量级变焦镜头，图像稳定器或振动补偿机构也是 尺寸减小。 示例性的改进的高倍率变焦透镜具有四组透镜片，即在更靠近被摄体的最前面位置处具有正折射率的第一或前导透镜组G1，负折射率的第二透镜组G2，第三透镜​​组G3 正折射率和最靠近成像面的最后方位的正折射率的第四透镜组G4全部以该顺序排列。 在将变焦透镜的整个透镜光学器件从广角端移动到远摄端时，第二透镜组G2朝向成像平面移动，并且移动第四透镜组G4以补偿所得到的图像的变化位置 而第一和第三透镜组G1和G3具有沿着光轴固定的各自的位置。 变焦透镜满足以下公式所定义的要求：f3 / f4> 2.0和v4> 65其中f3是第三透镜组G3的焦距，f4是第四透镜组的焦距，v4是平均值 的Abbe与第四透镜组G4中的所有凸透镜片的对比。

公开(公告)号：US20110019288A1

公开(公告)日：2011-01-27

申请号：US12893672

申请日：2010-09-29

申请人： Hisayuki YAMANAKA ,  Dayong Li

发明人： Hisayuki YAMANAKA ,  Dayong Li

IPC分类号： G02B15/14

CPC分类号： G02B15/173

摘要： An inner-focusing zoom lens that includes multi groups of lens pieces, namely, the first lens group or the leading lens group of positive refractivity, the second lens group of negative refractivity, and the remaining trailing groups of positive refractivity, as a whole. At least one group of positive refractivity among the trailing groups includes two or more negative lens pieces, at least one of which is connected on its surface to another lens piece to form a duplicated composite lens so that the junction between two of them functions to diverge incident beams. Assuming now that a sum of the refractivities of all the junctions of the composite lenses can be expressed as Σφ=Σ|(N1−N2)/R| where N1 and N2 are refractivities that substances before and after the junction of the composite lenses respectively have, R is a radius of curvature of the junction, ft is a focal length of the comprehensive lens optics of the zoom lens at the telephoto end.

摘要翻译： 作为整体，包括多组透镜片的内聚焦变焦透镜，即正折射率的第一透镜组或前透镜组，负折射率的第二透镜组和正折射率的剩余尾部组。 拖尾组中的至少一组正折射率包括两个或更多个负透镜片，其中至少一个在其表面上连接到另一透镜片以形成复制的复合透镜，使得它们中的两个之间的连接起分支作用 入射光束。 现在假设复合透镜的所有接头的折射率之和可以表示为＆Sgr; |（N1-N2）/ R | 其中N1和N2是复合透镜的接合之前和之后的物质的折射率，R是连接点的曲率半径，ft是变焦透镜在望远端的综合透镜光学元件的焦距。

公开(公告)号：US20090303609A1

公开(公告)日：2009-12-10

申请号：US12457141

申请日：2009-06-02

申请人： Dayong Li ,  Toru Nara

发明人： Dayong Li ,  Toru Nara

IPC分类号： G02B15/14

CPC分类号： G02B15/173 ,  G02B27/646

摘要： The present invention is directed to high magnification compact zoom lenses that are reduced in diameter of groups of lens pieces closer to the imaging plane to provide downsized lightweight zoom lenses of magnification as high as 20 diameters, with an image stabilizer or vibration compensating mechanism being also reduced in dimensions. An exemplary improved high magnification zoom lens has four groups of lens pieces, namely, the first or leading lens group G1 of positive refractivity in the foremost position closer to the subject, the second lens group G2 of negative refractivity, the third lens group G3 of positive refractivity, and the fourth lens group G4 of positive refractivity in the rearmost position closer to the imaging plane, all arranged in this order. In displacing the entire lens optics of the zoom lens from the wide-angle end to the telephoto end, the second lens group G2 are moved toward the imaging plane and the fourth lens group G4 are moved to compensate for a varied position of the resultant image while the first and third lens groups, G1 and G3, have their respective positions fixed along the optical axis. The zoom lens satisfies the requirements as defined in the following formulae: f3/f4>2.0 and v4>65 where f3 is a focal length of the third lens group G3, f4 is the focal length of the fourth lens group, v4 is an average of Abbe contrasts of all the convex lens pieces in the fourth lens group G4.

摘要翻译： 本发明涉及一种高倍率小型变焦镜头，其减小了靠近成像平面的镜片组的直径，以提供高达20个直径的放大倍率的小型化轻量级变焦镜头，图像稳定器或振动补偿机构也是 尺寸减小。 示例性的改进的高倍率变焦透镜具有四组透镜片，即在更靠近被摄体的最前面位置处具有正折射率的第一或前导透镜组G1，负折射率的第二透镜组G2，第三透镜​​组G3 正折射率和最靠近成像面的最后方位的正折射率的第四透镜组G4全部以该顺序排列。 在将变焦透镜的整个透镜光学器件从广角端移动到远摄端时，第二透镜组G2朝向成像平面移动，并且移动第四透镜组G4以补偿所得到的图像的变化位置 而第一和第三透镜组G1和G3具有沿着光轴固定的各自的位置。 变焦透镜满足以下公式所定义的要求：f3 / f4> 2.0和v4> 65其中f3是第三透镜组G3的焦距，f4是第四透镜组的焦距，v4是平均值 的Abbe与第四透镜组G4中的所有凸透镜片的对比。

公开(公告)号：US08498059B2

公开(公告)日：2013-07-30

申请号：US13116256

申请日：2011-05-26

申请人： Dayong Li

发明人： Dayong Li

IPC分类号： G02B15/14 ,  G02B27/64

CPC分类号： G02B27/646 ,  G02B15/173

摘要： The present invention is a variable power zoom lens that is suitable to APS-format single-lens reflex cameras. The zoom lens has the foremost or first lens group G1 of positive refractivity, the second lens group G2 of negative refractivity, the third lens group G3 of positive refractivity, and the fourth lens group G4 of positive refractivity disposed in sequence from a position closer to the object to photograph toward the image plane. The third lens group G3 has a front lens subset G3F of positive refractivity and a back lens subset G3B, and the back lens subset G3B alone is moved orthogonal to the optical axis to correct a blur of an image on the image plane caused by a shake of photographer's hands.

摘要翻译： 本发明是适用于APS格式的单镜头反光相机的可变功率变焦镜头。 变焦透镜具有正折射率的最前面或第一透镜组G1，负折射率的第二透镜组G2，正折射率的第三透镜组G3和正折射率的第四透镜组G4从更靠近 物体朝向图像平面拍摄。 第三透镜组G3具有正折射率的前透镜子集G3F和后透镜子集G3B，并且单​​独的后透镜子集G3B与光轴正交地移动以校正由抖动引起的图像上的图像的模糊 的摄影师的手。

公开(公告)号：US08169718B2

公开(公告)日：2012-05-01

申请号：US12662355

申请日：2010-04-13

申请人： Dayong Li ,  Hiroshi Yamamoto ,  Hiroki Harada

发明人： Dayong Li ,  Hiroshi Yamamoto ,  Hiroki Harada

IPC分类号： G02B9/34

CPC分类号： G02B15/177

摘要： The present invention is directed to wide-angle zoom lenses dedicated to single-lens reflex digital cameras, which attains zoom ratio greater than 2. Such a wide-angle zoom lens has four groups of lens pieces, namely comprising the leading or foremost 1st lens group of negative refractivity closest to an objective field, the succeeding 2nd lens group of positive refractivity, the third lens group of negative refractivity, and the trailing 4th lens group of positive refractivity arranged in this order to move each lens group to vary optical power; and the 1st lens group includes a front subset of the lens pieces of negative refractive power and a rear subset of negative refractive power. The front-end lens piece in the 1st lens group is shaped in negative meniscus lens that has its concave surface faced toward an imaging plane and has the opposite surfaces shaped aspherical. The front and rear subsets of the 1st lens group meet requirements of a focal length as expressed in the following formula: 3.5≦|f1b/f1a|≦6.0 where f1a is a focal length of the front subset of the lens pieces in the 1st lens group and f1b is the focal length of the rear subset in the 1st lens group.

摘要翻译： 本发明涉及专用于单镜头反光数码相机的广角变焦镜头，其获得大于2的变焦比。这种广角变焦镜头具有四组透镜片，即包括前面或最前面的第一透镜 最接近目标场的负折射率组，正折射率的后续第二透镜组，负折射率的第三透镜组和正折射率的后第四透镜组按顺序排列以移动每个透镜组以改变光焦度; 并且第一透镜组包括负屈光力透镜片的前子集和负屈光力的后子集。 第一透镜组中的前端透镜片成形为负弯月形透镜，其凹面朝向成像平面并且具有相对的非球面形状。 第一透镜组的前后子集满足以下公式表示的焦距要求：3.5＆nlE; | f1b / f1a |＆nlE; 6.0其中f1a是透镜片的前部子集的焦距 第一透镜组和f1b是第一透镜组中后部子集的焦距。