公开(公告)号：EP1837693A1

公开(公告)日：2007-09-26

申请号：EP07250552.2

申请日：2007-02-12

Applicant: NIKON CORPORATION

Inventor： Yamamoto, Hiroshi

IPC: G02B15/177

CPC classification number: G02B15/177 ,  G02B13/04

Abstract: Providing a retrofocus lens system and an image-taking device having small variation in aberrations upon focusing on a close object with a high imaging magnification. The retrofocus lens system includes, in order from an object, a first lens group G1 having negative refractive power, a second lens group G2 having negative refractive power, and a third lens group G3 having positive refractive power. Upon focusing from infinity to a close object, the first lens group G1, the second lens group G2, and the third lens group G3 are moved to the object such that a distance between the first lens group G1 and the second lens group G2 increases, and a distance between the second lens group G2 and the third lens group G3 decreases.

Abstract translation: 提供一种后焦距透镜系统和在以高成像倍率聚焦在紧密物体上时具有小像差变化的摄像装置。 后焦点透镜系统从物体依次包括具有负折光力的第一透镜组G1，具有负折光力的第二透镜组G2和具有正折光力的第三透镜组G3。 当从无限远到近距离物体聚焦时，第一透镜组G1，第二透镜组G2和第三透镜组G3移动到物体，使得第一透镜组G1和第二透镜组G2之间的距离增加， 并且第二透镜组G2和第三透镜组G3之间的距离减小。

公开(公告)号：EP0913718B1

公开(公告)日：2007-07-18

申请号：EP98120501.6

申请日：1998-10-29

Applicant: CANON KABUSHIKI KAISHA

Inventor： Fujibayashi, Kazuo

IPC: G02B15/177

CPC classification number: G02B27/4272 ,  G02B15/177 ,  G02B27/0037 ,  G02B27/0056 ,  G02B27/4211 ,  G02B27/4277 ,  G02B27/4288

公开(公告)号：EP1498758B1

公开(公告)日：2007-06-27

申请号：EP04016440.2

申请日：2004-07-13

Applicant: SONY CORPORATION

Inventor： Iwasawa, Yoshito ,  Sueyoshi, Masafumi

IPC: G02B15/177

CPC classification number: G02B15/177

公开(公告)号：EP1767977A3

公开(公告)日：2007-05-02

申请号：EP06019387.7

申请日：2006-09-15

Applicant: Olympus Imaging Corporation

Inventor： Hosokawa, Kazuyuki

IPC: G02B15/177 ,  G02B5/04

CPC classification number: G02B15/177 ,  G02B5/04 ,  G02B13/0045 ,  G02B13/006 ,  G02B13/007 ,  G02B13/009

Abstract: Negative-lead opical zoom having four lens-groups, the first group containing a lens-prism.

公开(公告)号：EP1628152A3

公开(公告)日：2006-05-24

申请号：EP05025990.2

申请日：2003-05-08

Applicant: Olympus Corporation

Inventor： Mihara, Shinichi c/o Intellectual Property Depart.

IPC: G02B15/177 ,  G02B17/00

CPC classification number: G02B13/04 ,  G02B5/04 ,  G02B5/08 ,  G02B15/177

Abstract: A zoom lens includes a most object-side lens unit (G1) remaining fixed on the optical axis when the magnification of the zoom lens is changed and a focusing operation is performed; a most image-side lens unit (G4,G5) remaining fixed when the focusing operation is performed; and a plurality of moving lens units (G2,G3) lying between the most object-side lens unit and the most image-side lens unit, moved along the optical axis when the magnification is changed. The most object-side lens unit (G1) includes, in order from the object side, a negative lens component (L1,1), a reflective optical component (R1) having a reflecting surface for bending the optical path, and a positive lens component (L1,2). The most image-side lens unit has at least one aspherical surface. An electronic imaging device includes an electronic image sensor located on the image side of the zoom lens.

Abstract translation: 变焦透镜包括当变焦镜头的倍率改变并且执行聚焦操作时保持固定在光轴上的最物体侧透镜单元（G1）; 执行聚焦操作时保持固定的最大像侧透镜单元（G4）; 以及位于最物体侧透镜单元和最大像侧透镜单元之间的多个移动透镜单元（G2，G3），当放大变化时沿光轴移动。 最物体侧透镜单元从物体侧依次包括负透镜部件（L1.1），具有用于弯曲光路（R1）的反射面的反射光学部件和正透镜部件（L2） 0.2）。 最图像侧透镜单元具有至少一个非球面。 电子成像装置包括位于变焦透镜的图像侧（I）上的电子图像传感器。

公开(公告)号：EP1563331A1

公开(公告)日：2005-08-17

申请号：EP03758506.4

申请日：2003-10-31

Applicant: Koninklijke Philips Electronics N.V.

Inventor： OPHEY, Willem, G.

IPC: G02B15/177 ,  G02B15/16

CPC classification number: H04M1/0264 ,  G02B9/04 ,  G02B13/0065 ,  G02B13/007 ,  G02B13/009 ,  G02B15/16 ,  G02B15/177 ,  H04N2007/145

Abstract: In a zoom lens (30) comprising, from the object side to the image side, a front lens group (12) and a controllable lens group (24), the controllable lens group comprises two lens elements (25, 26) having different dispersions and being movable with respect to each other so as to perform a focusing action. One of the lens elements corrects for the dispersion of the zoom lens. Preferably, the zoom lens comprises at least one folding mirror.

公开(公告)号：EP1498757A1

公开(公告)日：2005-01-19

申请号：EP04016439.4

申请日：2004-07-13

Applicant: SONY CORPORATION

Inventor： Tamura, Masaki

IPC: G02B15/177

CPC classification number: G02B23/14 ,  G02B23/145

Abstract: A variable power finder is proposed, which comprises: an objective system; an inverting system; and an ocular system, in order from object side. The third lens group of the objective system is constituted by one lens prism having at least one reflection surface, and following expressions are satisfied: (1)   f3/fw ≥ 2.5 (2)   -1.0 (3)   L1/fw 2 ≤ 0.45 (4)   L2/fw 2 ≥ 0.03 where f3 is a focal distance of third lens group, fw is a focal distance at wide angle end of objective system, R31 is a curvature radius of object side lens surface of lens prism, R32 is a curvature radius of image side lens surface of lens prism, L1 is an air equivalent distance from middle imaging surface to object side lens surface of lens prism, and L2 is a distance from middle imaging surface to image side lens surface of lens prism.

Abstract translation: 提出了一种可变功率寻找器，包括：客观系统; 翻转系统; 和眼睛系统，从物体侧开始。 物镜系统的第三透镜组由具有至少一个反射面的一个透镜棱镜构成，满足以下表达式：（1）f3 /fw≥2.5（2）-1.0 （3）L1 / fw <2>≤0.45（4）L2 /fw2≥0.03 其中f3是第三透镜组的焦距，fw是物镜系统的广角端的焦距，R31是透镜棱镜的物体侧透镜表面的曲率半径，R32是像侧的曲率半径 透镜棱镜的透镜表面，L1是从中间成像面到透镜棱镜的物体侧透镜表面的空气当量距离，L2是从中间成像面到透镜棱镜的像侧透镜面的距离。

公开(公告)号：EP1353208B1

公开(公告)日：2004-09-29

申请号：EP03008373.7

申请日：2003-04-10

Applicant: Olympus Corporation

Inventor： Nozawa, Toshihide, Intellecutal Property Dept. ,  Iijima, Kyoko, Intellecutal Property Dept.

IPC: G02B15/177 ,  G02B15/14

CPC classification number: G02B15/177

公开(公告)号：EP0913718A3

公开(公告)日：2004-07-28

申请号：EP98120501.6

申请日：1998-10-29

Applicant: CANON KABUSHIKI KAISHA

Inventor： Fujibayashi, Kazuo

IPC: G02B15/177

CPC classification number: G02B27/4272 ,  G02B15/177 ,  G02B27/0037 ,  G02B27/0056 ,  G02B27/4211 ,  G02B27/4277 ,  G02B27/4288

Abstract: A zoom lens includes three lens units which are a first unit having a negative refracting power, a second unit having a positive refracting power, and a third unit having a positive refracting power arranged in the stated order from the side of an original surface. Zooming is effected by changing an air space between the first unit and the second unit and an air space between the second unit and the third unit. The second unit has a diffractive optical element.

公开(公告)号：EP1326119A2

公开(公告)日：2003-07-09

申请号：EP02258991.5

申请日：2002-12-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tochigi, Nobuyuki, c/o Canon Kabushiki Kaisha

IPC: G02B27/00 ,  G02B15/177

CPC classification number: G02B13/18 ,  G02B13/24

Abstract: Disclosed is an image reading apparatus which includes an illumination system, a reading unit, and an imaging optical system (PL) for imaging imagewise information provided on a surface (P) of an original as illuminated by the illumination system, upon a surface (Q) of the reading unit. The imaging optical system includes, in an order from the original surface (P) side, a first lens group (G1) of negative refractive power, a second lens group (G2) of positive refractive power, and a third lens group (G3) of negative refractive power. The image reading apparatus has a focal point position adjusting function and a focal length changing function based on movement of at least one of the lens groups of the imaging optical system. In the imaging optical system, a condition 0.01

Abstract translation: 公开了一种图像读取装置，其包括照明系统，读取单元和成像光学系统（PL），用于对设置在由照明系统照射的原稿的表面（P）上的图像信息进行成像， ）阅读单位。 成像光学系统以原始面（P）侧的顺序包括负折射力的第一透镜组（G1），正折光力的第二透镜组（G2）和第三透镜组（G3） 的负屈光力。 图像读取装置具有基于成像光学系统的至少一个透镜组的移动的焦点位置调整功能和焦距变化功能。 在成像光学系统中，满足条件0.01