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    • 1. 发明申请
    • Photographic lens
    • 摄影镜头
    • US20030117723A1
    • 2003-06-26
    • US10225358
    • 2002-08-22
    • Yoshikazu Shinohara
    • G02B003/02G02B013/18G02B009/04G02B009/06
    • G02B13/003G02B9/04G02B13/18
    • A compact photographic lens for a digital camera is disclosed. The photographic lens has only two lens elements, yet provides excellent imaging even at the periphery of the image field. The photographic lens of the invention and an image sensor, together, fit within a volume of about 10 cm3 The lens is formed of, in order from the object side, a biconvex lens element having two aspherical surfaces, and a positive meniscus lens element having two aspherical surfaces. The convex surface of the meniscus lens element is positioned on the image side, and various conditions are satisfied in order to provide the photographic lens with a short overall length while favorably correcting various aberrations.
    • 公开了一种用于数码相机的小型摄影镜头。 摄影镜头仅具有两个透镜元件,即使在图像场的周边也提供优异的成像。 本发明的摄影镜头和图像传感器一起配合在约10cm 3的体积内。透镜从物体侧依次形成具有两个非球面的双凸透镜元件和正弯月透镜元件,其具有 两个非球面。 弯月透镜元件的凸表面位于图像侧,并且满足各种条件以便提供短整体长度的摄影透镜,同时有利地校正各种像差。
    • 5. 发明申请
    • Single focus lens
    • 单焦点镜头
    • US20030048549A1
    • 2003-03-13
    • US10091282
    • 2002-03-06
    • Kenichi Sato
    • G02B009/04G02B009/06
    • G02B13/003G02B9/06G02B13/18
    • A single focus lens formed of only two lens groups, both of positive refractive power, with each lens group being formed of only a single lens. The lens of the first lens group has at least one of its surfaces aspherical, and the lens element of the second lens group has at least one of its surfaces aspherical and is convex on the object side. In addition, the following conditions are satisfied in order to provide a single focus lens suitable for use in a highly portable, compact camera, such as a digital camera: nulld2>50 nullf/f1null
    • 仅由两个透镜组形成的单焦点透镜,均为正屈光力,每个透镜组仅由单个透镜形成。 第一透镜组的透镜具有非球面的至少一个表面,并且第二透镜组的透镜元件具有非球面中的至少一个表面,并且在物体侧具有凸形。 此外,为了提供适合用于诸如数字照相机的高度便携式,小型照相机的单焦点透镜,满足以下条件:nud2> 50 | f / f1 | <0.75其中nud2是阿贝数, 在形成第二透镜组的透镜元件的d线处,f是单焦点透镜的焦距,f1是形成第一透镜组的透镜的焦距。
    • 6. 发明申请
    • Taking lens
    • 拍摄镜头
    • US20020015238A1
    • 2002-02-07
    • US09897884
    • 2001-07-05
    • Fuji Photo Film Co., Ltd.
    • Kazumi Koike
    • G02B009/06G02B009/00G02B009/08
    • G02B9/04G02B13/18
    • A taking lens comprises a first meniscus lens opposing its convex surface to an object side and a second lens having a positive power. An image side surface of the first lens and an object side surface of the second lens are aspherical. The taking lens satisfies the following condition:0.25nullF/F1null0.39null2.5nullF/R3nullfnonull1.5wherein F represents a focal length of the taking lens, F1 represents a focal length of the first lens, R3 represents a radius of the curvature of the object side surface of the second lens, and fno represents a f-number of the taking lens at open aperture.
    • 拍摄镜头包括与其凸面相对物体侧的第一弯月透镜和具有正光焦度的第二透镜。 第一透镜的像侧表面和第二透镜的物体侧表面是非球面的。 摄影镜片满足以下条件:<段落lvl =“0”> 0.25 <= F / F1 <= 0.39 <段落lvl =“0”> -2.5 <= F / R3xfno <= 1.5 其中F表示拍摄镜头的焦距,F1表示第一透镜的焦距,R3表示 第二透镜的物体侧表面的曲率,fno表示打开孔径下的拍摄镜头的f数。
    • 7. 发明申请
    • Objective lens
    • 物镜
    • US20010033425A1
    • 2001-10-25
    • US09793566
    • 2001-02-27
    • Shingo KashimaTakehiro Yoshida
    • G02B021/02G02B009/04G02B009/06
    • G02B21/02
    • An objective lens includes a first lens unit constructed with a plurality of single lenses, having a negative power as a whole, and a second lens unit constructed with a plurality of single lenses, arranged on the object side of the first lens unit. Each of the first and second lens units is provided with air spaces between positive and negative lenses of different media and has at least one pair of lenses designed to satisfy all the following conditions when the parfocal distance of the objective lens is denoted by L (mm), an air apace by d (mm), the radius of curvature of a lens surface with a positive power opposite to the air space by Rp, and the radius of curvature of a lens surface with a negative power opposite to the air space by Rn, and in addition to the pair of lenses, the second lens unit has at least one single positive biconvex lens and at least one single positive meniscus lens, and thereby it becomes possible to correct chromatic aberration and to favorably obtain resolution corresponding to a high numerical aperture and a wavelength used: 0.01
    • 物镜包括由多个单一透镜构成的第一透镜单元,整个具有负光焦度,以及第二透镜单元,该第一透镜单元设置在第一透镜单元的物体侧上,具有多个单透镜。 第一和第二透镜单元中的每一个在不同介质的正透镜和负透镜之间设置有空气空间,并且具有至少一对透镜,其被设计成当物镜的对焦距离由L(mm)表示时满足以下所有条件 ),通过d(mm)的空气宽度,具有与空气空间相反的正功率的透镜表面的曲率半径Rp,以及具有与空气空间相反的负功率的透镜表面的曲率半径由 Rn,并且除了一对透镜之外,第二透镜单元具有至少一个单个正双凸透镜和至少一个单个正弯月形透镜,从而可以校正色差并有利地获得对应于高的透镜 数值孔径和使用的波长:0.01