公开(公告)号：US20100103537A1

公开(公告)日：2010-04-29

申请号：US12607753

申请日：2009-10-28

申请人： Yu KITAHARA ,  Yoko Yamamoto ,  Taro Asami

发明人： Yu KITAHARA ,  Yoko Yamamoto ,  Taro Asami

IPC分类号： G02B9/60

CPC分类号： G02B9/60

摘要： An imaging lens includes, in order from an object side, a first lens having a negative power and including a concave image-side surface, a second lens having a positive power, a stop, a third negative lens, which is a biconcave lens, a fourth lens having a positive power, and a fifth lens having a positive power and including a convex image-side surface. The imaging lens satisfies the following conditional expressions: 0.18

摘要翻译： 成像透镜从物体侧依次包括具有负光焦度并包括凹面像侧面的第一透镜，具有正光焦度的第二透镜，作为双凹透镜的第三透镜，第三负透镜， 具有正功率的第四透镜和具有正功率并包括凸像侧表面的第五透镜。 成像透镜满足以下条件表达式：0.18 <（D4 + D5）/ f <0.44和0.18

公开(公告)号：US20100103538A1

公开(公告)日：2010-04-29

申请号：US12580729

申请日：2009-10-16

申请人： Yu KITAHARA

发明人： Yu KITAHARA

IPC分类号： G02B9/08

CPC分类号： G02B9/62

摘要： An imaging lens includes, in order from an object side, a positive first lens group, a stop, and a positive second lens group. The first lens group includes, in order from the object side, a first lens, which is a negative meniscus lens having a convex object-side surface, and a second lens having a positive power and including a convex image-side surface. The second lens group includes, in order from the object side, a third lens having a negative power and including a concave object-side surface, a fourth lens having a positive power and including a convex image-side surface, a fifth lens, which is a biconvex lens, and a sixth lens, which is a meniscus lens having a negative power and including a convex surface facing an image side. Each of the first to sixth lenses is a single spherical glass lens.

摘要翻译： 成像透镜从物体侧依次包括正的第一透镜组，止挡和正的第二透镜组。 第一透镜组从物体侧依次包括作为具有凸形物体侧表面的负弯月形透镜的第一透镜和具有正光焦度并包括凸形像侧表面的第二透镜。 第二透镜组从物体依次包括具有负光焦度并包括凹面物体侧表面的第三透镜，具有正光焦度并包括凸像侧表面的第四透镜，第五透镜， 是双凸透镜，第六透镜是具有负光焦度并且包括面向图像侧的凸面的弯月形透镜。 第一至第六透镜中的每一个都是单个球形玻璃透镜。

公开(公告)号：US20090129241A1

公开(公告)日：2009-05-21

申请号：US12273139

申请日：2008-11-18

申请人： Toshiaki KATSUMA ,  Masao MORI ,  Tetsuya ORI ,  Yu KITAHARA

发明人： Toshiaki KATSUMA ,  Masao MORI ,  Tetsuya ORI ,  Yu KITAHARA

IPC分类号： G11B7/00

CPC分类号： G02B27/0031 ,  G11B7/1374

摘要： An objective lens consists of a single lens element, and has a light source side surface formed into a convex surface having a large curvature and an optical recording medium side surface has a small curvature. The both surfaces are aspheric surfaces. Also, the objective lens satisfies the following expressions (1) to (3): 0.7

摘要翻译： 物镜由单个透镜元件组成，具有形成为具有大曲率的凸面的光源侧面，光记录介质侧面的曲率小。 两个表面都是非球面。 此外，物镜满足以下表达式（1）〜（3）：<？in-line-formula description =“In-line formula”end =“lead”？> 0.7 <？in-line-formula description =“In-line formula”end =“lead”？> 0.70 <？in-line-formula description =“In-line Formulas”end =“lead”？> 0.48 其中NA表示物镜在光记录介质侧的数值孔径，d表示物镜的厚度 透镜在光轴上以mm表示，f表示物镜的焦距，单位为mm。 X等于（X1-X2）（n-1）/（NA.f），其中X1和X2表示与各个表面中的下垂量有关的值，n表示折射率。

公开(公告)号：US20090161236A1

公开(公告)日：2009-06-25

申请号：US12334305

申请日：2008-12-12

申请人： Yu KITAHARA

发明人： Yu KITAHARA

IPC分类号： G02B9/62

CPC分类号： G02B13/146

摘要： The imaging lens system includes a negative first lens disposed on a most object side, having a concave surface directed toward the object side and having a meniscus shape, a cemented lens LC disposed on a most image side and having a convex surface on its most object side, and an aperture diaphragm disposed just in front of the object side of the cemented lens. The system satisfies the following conditional expressions: 0.05 15 where R1 and R2 denote radius of curvatures of object side and image side surfaces of the first lens, respectively, and vd1 and vd2 denote Abbe numbers of lenses, which are located on the most object side and on the most image side among lenses constituting the cemented lens, at the d-line, respectively.

摘要翻译： 成像透镜系统包括设置在最物体侧的负第一透镜，具有朝向物体侧的凹面，并具有弯月形状，配置在最像像侧的胶合透镜LC，并且在其最物体上具有凸面 以及刚好位于胶合透镜的物体侧前方的孔径光阑。 系统满足以下条件表达式：<？in-line-formula description =“In-line Formulas”end =“lead”？> 0.05 <（R2-R1）/（R1 + R2）<0.25 < -formulae description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“In-line Formulas”end =“lead”？> vd1-vd2> 15 <？in-line- 公式描述=“在线公式”end =“tail”？>其中R1和R2分别表示第一透镜的物体侧和像侧面的曲率半径，vd1和vd2表示透镜的阿贝数， 分别位于构成胶合透镜的透镜中的最物体侧和最大像侧的d线。

公开(公告)号：US20100302431A1

公开(公告)日：2010-12-02

申请号：US12787011

申请日：2010-05-25

申请人： Yu KITAHARA

发明人： Yu KITAHARA

IPC分类号： H04N5/225 ,  G02B9/10

CPC分类号： G02B13/005 ,  G02B9/60 ,  G02B13/14 ,  G02B13/146

摘要： Disclosed is an imaging lens capable of improving weatherability, reducing performance degradation, and obtaining an optical performance excellent across a wide wavelength region from the visible wavelength region to the near-infrared wavelength region. An imaging lens for forming an image of visible and near-infrared light includes, in order from the object side: a front group that has a positive power; an aperture stop; and a rear group that has a negative power. In the imaging lens, the rear group includes a negative meniscus lens that is disposed closer to the object side and has a surface convex toward the object side, and a biconvex lens that is disposed closer to the image side. In addition, all the lenses constituting the imaging lens are single lenses.

摘要翻译： 公开了一种能够改善耐候性，降低性能劣化并获得从可见波长区域到近红外波长区域的宽波长区域优异的光学性能的成像透镜。 用于形成可见光和近红外光的图像的成像透镜从物体侧起依次包括具有正光焦度的前组; 孔径光阑; 以及具有负功率的后组。 在成像透镜中，后组包括靠近物体侧设置并且朝向物体侧具有凸面的负弯月形透镜和靠近图像侧设置的双凸透镜。 另外，构成摄像透镜的所有透镜都是单透镜。

公开(公告)号：US20110299178A1

公开(公告)日：2011-12-08

申请号：US13153979

申请日：2011-06-06

申请人： Yu KITAHARA

发明人： Yu KITAHARA

IPC分类号： G02B13/18

CPC分类号： G02B13/004 ,  G02B9/34 ,  G02B13/04

摘要： An image pickup lens having a four lens configuration in which a bi-concave first lens, a bi-convex second lens, a bi-concave third lens, and a positive fourth lens are disposed in this order from an object side. Here, at least one of the first, second, third, and fourth lenses has an aspherical surface on each side. The image pickup lens satisfies Conditional Expression (1) given below when a refractive index of the second lens with respect to d-line is taken as Nd2. 1.6

摘要翻译： 具有四个透镜结构的图像拾取透镜，其中从物体侧依次设置双凹第一透镜，双凸第二透镜，双凹第三透镜和正第四透镜。 这里，第一，第二，第三和第四透镜中的至少一个在每一侧具有非球面。 当将第二透镜相对于d线的折射率取为Nd2时，图像拾取透镜满足下面给出的条件表达式（1）。 1.6

公开(公告)号：US20090129243A1

公开(公告)日：2009-05-21

申请号：US12273251

申请日：2008-11-18

申请人： Toshiaki KATSUMA ,  Masao MORI ,  Tetsuya ORI ,  Yu KITAHARA

发明人： Toshiaki KATSUMA ,  Masao MORI ,  Tetsuya ORI ,  Yu KITAHARA

IPC分类号： G11B7/00

CPC分类号： G11B7/1374

摘要： An objective lens consists of a single lens element. A light source side surface is formed into a convex surface having a large curvature, and an optical recording medium side surface has a small curvature. The both surfaces are formed into aspheric surfaces. Also, the objective lens satisfies the following expressions (1) to (3): 0.70

摘要翻译： 物镜由单个透镜元件组成。 光源侧面形成为具有大曲率的凸面，光记录介质侧面的曲率小。 两面形成非球面。 另外，物镜满足以下表达式（1）〜（3）：<？in-line-formula description =“In-line formula”end =“lead”？> 0.70 <？in-line-formula description =“In-line formula”end =“lead”？> 0.70 <？in-line-formula description =“In-line Formulas”end =“lead”？> 0.50 其中NA表示物镜在光记录介质侧的数值孔径，d表示厚度， mm，并且g是与垂直于光轴并与物镜的光源侧表面的顶点相切的切向平面的距离（mm），以mm为单位 物镜的重心。

公开(公告)号：US20090002850A1

公开(公告)日：2009-01-01

申请号：US12134088

申请日：2008-06-05

申请人： Masao MORI ,  Yu KITAHARA ,  Ryoko OTOMO

发明人： Masao MORI ,  Yu KITAHARA ,  Ryoko OTOMO

IPC分类号： G02B9/12

CPC分类号： G02B7/008 ,  G02B9/34 ,  G02B13/26 ,  G02B27/0037 ,  G02B27/4211 ,  G02B27/4216 ,  G02B27/4283

摘要： A color image readout lens comprises, in order from an object side: a first group comprising a positive lens convex toward the object side and a biconcave negative lens; a stop; a second group comprising one diffractive optical element that has at least one flat surface and has a diffractive structure formed on the flat surface; and a third group comprising a biconvex positive lens and a negative lens concave toward the object side.

摘要翻译： 彩色图像读出透镜从物体侧开始依次包括：朝向物体侧凸起的正透镜的第一组和双凹面负透镜; 停下来 包括具有至少一个平坦表面并且具有形成在所述平坦表面上的衍射结构的一个衍射光学元件的第二组; 以及第三组，包括朝向物体侧的双凸正透镜和负透镜凹。