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：US20090285078A1

公开(公告)日：2009-11-19

申请号：US12466465

申请日：2009-05-15

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： G11B7/135 ,  G02B13/18

CPC分类号： G02B3/04 ,  G11B7/1374

摘要： An objective lens for converging light emitted from a light source onto an optical recording medium to record and reproduce information consists of a single lens that has at least one aspheric surface. The following conditional expressions (1) and (2) are satisfied: −0.90

摘要翻译： 用于将从光源发射的光会聚到光学记录介质上以记录和再现信息的物镜由具有至少一个非球面的单个透镜组成。 满足以下条件表达式（1）和（2）：-0.90R1 / R2 0.70d / f其中R1表示光轴附近的光源侧表面的曲率半径（mm），R2表示曲率半径 （mm），d表示光轴上的厚度（mm），f表示焦距（mm）。

公开(公告)号：US20090129242A1

公开(公告)日：2009-05-21

申请号：US12273193

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 8 consists of a single lens element. A light source side surface 8a is formed into a convex surface having a large curvature, and an optical recording medium side surface 8b has a small curvature. Also, the objective lens satisfies the following expressions (1) and (2) ΦA/ΦB

摘要翻译： 物镜8由单个透镜元件组成。 光源侧表面8a形成为具有大曲率的凸表面，并且光记录介质侧表面8b具有小曲率。 此外，物镜满足以下表达式（1）和（2）<？in-line-formula description =“In-line formula”end =“lead”？> PhiA / PhiB <5.0（1）<？ line-formula description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“In-line Formulas”end =“lead”？> 7.69 <= PhiA / PhiB + 19.33xbf' /f'<=9.45（2）<？in-line-formula description =“In-line Formulas”end =“tail”？>其中PhiA表示物镜的光源侧表面的有效直径（mm） 如图8所示，PhiB表示物镜8的光记录介质侧面的有效直径（mm），bf'表示物镜8的后焦距（mm），f'表示物镜8的焦距（mm） 物镜8。

公开(公告)号：US07266070B2

公开(公告)日：2007-09-04

申请号：US10808301

申请日：2004-03-25

申请人： Yu Kitahara ,  Tetsuya Ori ,  Toshiaki Katsuma

发明人： Yu Kitahara ,  Tetsuya Ori ,  Toshiaki Katsuma

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G11B7/1353 ,  G11B2007/0006

摘要： An objective lens and an optical pickup device utilizing it are disclosed wherein the objective lens includes a specified aspheric surface profile having a discontinuity and a single specified diffraction optical surface so to provide a focusing effect which is usable with different optical recording media, such as a CD versus a DVD. By providing a single diffraction surface and an aspheric surface having a discontinuity, more freedom of design is achieved for the diffraction surface than would otherwise be possible. The objective lens according to the invention is designed so as to be both compact and inexpensive and enables recording/playback onto either type optical recording media using different wavelengths and different numerical apertures, depending on the recording medium used.

摘要翻译： 公开了一种使用它的物镜和光学拾取装置，其中物镜包括具有不连续性和单个特定衍射光学表面的特定的非球面表面轮廓，从而提供可用于不同光学记录介质的聚焦效果，例如 CD与DVD。 通过提供具有不连续性的单个衍射表面和非球面表面，对于衍射表面实现了比否则可能更大的设计自由度。 根据本发明的物镜被设计为既紧凑又廉价，并且根据所使用的记录介质，能够使用不同波长和不同数值孔径对任一类型的光记录介质进行记录/重放。

公开(公告)号：US20060262427A1

公开(公告)日：2006-11-23

申请号：US11429988

申请日：2006-05-09

申请人： Masao Mori ,  Yu Kitahara ,  Makoto Oomura ,  Yoko Yamamoto ,  Toshiaki Katsuma

发明人： Masao Mori ,  Yu Kitahara ,  Makoto Oomura ,  Yoko Yamamoto ,  Toshiaki Katsuma

IPC分类号： G02B13/02 ,  G01J1/04

CPC分类号： G02B6/4206 ,  G02F1/167 ,  G02F2001/294

摘要： A coupling optical system for coupling light into an optical fiber of an optical communications system includes a liquid that includes a dispersion of microscopic particles and two transparent media that hold the liquid between them along an optical axis. The refractive power of the liquid is variable according to the electromagnetic field applied to the liquid to vary the migration of the microscopic particles of the dispersion within the liquid. The position of a light collecting point of the coupling optical system is adjustable based on the variation in the refractive power of the liquid so that light can be efficiently coupled into optical fibers at different distances along the optical axis from the coupling optical system. At the light collecting point, the end surface of an optical fiber collects light from a light source or another optical fiber. One or more collimator lenses may help converge the light.

摘要翻译： 用于将光耦合到光通信系统的光纤中的耦合光学系统包括液体，其包括微观颗粒的分散体和沿着光轴将液体保持在它们之间的两个透明介质。 液体的屈光力根据施加到液体的电磁场而变化，以改变液体中分散体的微观颗粒的迁移。 耦合光学系统的聚光点的位置可以基于液体的屈光力的变化来调节，使得光可以有效地耦合到光耦合光学系统沿光轴不同的距离。 在光收集点，光纤的端面收集来自光源或另一光纤的光。 一个或多个准直透镜可以帮助会聚光。

公开(公告)号：US20060077794A1

公开(公告)日：2006-04-13

申请号：US11231834

申请日：2005-09-22

申请人： Toshiaki Katsuma ,  Yu Kitahara ,  Masao Mori ,  Tetsuya Ori

发明人： Toshiaki Katsuma ,  Yu Kitahara ,  Masao Mori ,  Tetsuya Ori

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B7/1275 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/13727

摘要： An objective optical system for focusing light from a light source onto at least two different types of optical recording media having different substrate thicknesses in order to record or reproduce information on the optical recording media includes at least two lens groups arranged along an optical axis for focusing light of each one of two wavelengths that are the same or very nearly the same from the light source on a different one of the at least two different types of optical recording media, such as an AOD and a BD, having different substrate thicknesses. The separations of the two lens groups are different when light of each wavelength is used, and four different types of optical recording media with different substrate thicknesses may be used. An optical pickup device includes the objective optical system, the recording media, and a light source supplying the light of the two wavelengths.

摘要翻译： 用于将来自光源的光聚焦到具有不同衬底厚度的至少两种不同类型的光学记录介质以便在光学记录介质上记录或再现信息的物镜光学系统包括沿着光轴布置以聚焦的至少两个透镜组 具有不同基板厚度的至少两种不同类型的光学记录介质（例如AOD和BD）中的不同的一个上的光源相同或非常接近相同的两个波长中的每一个的光。 当使用每个波长的光时，两个透镜组的分离是不同的，并且可以使用具有不同衬底厚度的四种不同类型的光学记录介质。 光拾取装置包括物镜光学系统，记录介质和提供两个波长的光的光源。

公开(公告)号：US07995290B2

公开(公告)日：2011-08-09

申请号：US12466545

申请日：2009-05-15

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： G02B3/02 ,  G11B7/00

CPC分类号： G02B3/04 ,  G11B7/1374

摘要： An objective lens for converging light emitted from a light source on an optical recording medium to record and reproduce information consists of a single lens having at least one aspheric surface. The following conditional expressions (1) to (3) are satisfied: N≦1.75  (1) 0.5

摘要翻译： 用于将从光源发射的光会聚在光学记录介质上以记录和再现信息的物镜由具有至少一个非球面的单个透镜组成。 满足以下条件表达式（1）至（3）：N＆nlE; 1.75（1）0.5

公开(公告)号：US07903349B2

公开(公告)日：2011-03-08

申请号：US12580843

申请日：2009-10-16

申请人： Yu Kitahara

发明人： Yu Kitahara

IPC分类号： G02B9/06

CPC分类号： G02B9/60

摘要： An imaging lens includes, in order from an object side, a first lens group having a positive power, an aperture diaphragm, and a second lens group having a positive or negative power. The first lens group includes, in order from the object side, a first lens which is a biconcave lens, a second lens that has a positive power and includes a convex image-side surface, and a third lens that has a positive power and includes a convex object-side surface. The second lens group includes, in order from the object side, a fourth lens that has a negative power and includes a concave image-side surface, and a fifth lens which is a biconvex lens. Each of the first to fifth lenses is a single spherical glass lens.

摘要翻译： 成像透镜从物体侧依次包括具有正光焦度的第一透镜组，具有正或负光焦度的孔径光阑和第二透镜组。 第一透镜组从物体依次包括作为双凹透镜的第一透镜，具有正光焦度并包括凸像侧表面的第二透镜，以及具有正光焦度的第三透镜， 凸起的物体侧表面。 第二透镜组从物体侧依次包括具有负光焦度并包括凹面像侧表面的第四透镜和作为双凸透镜的第五透镜。 第一至第五透镜中的每一个是单个球形玻璃透镜。

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：US07663814B2

公开(公告)日：2010-02-16

申请号：US12334305

申请日：2008-12-12

申请人： Yu Kitahara

发明人： Yu Kitahara

IPC分类号： G02B9/60

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。 该系统满足以下条件表达式：0.05R2-R1）/（R1 + R2）vd1 -vd2> 15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 分别表示在构成胶合透镜的透镜中位于最物体侧和最大像侧的透镜的阿贝数。