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：US06552851B2

公开(公告)日：2003-04-22

申请号：US09905100

申请日：2001-07-16

申请人： Toshiaki Katsuma

发明人： Toshiaki Katsuma

IPC分类号： G02B518

CPC分类号： G02B19/0009 ,  G02B5/04 ,  G02B5/1814 ,  G02B19/0052 ,  G02B27/09 ,  G02B27/0972 ,  H01S3/005

摘要： An achromatic beam shaping prism is disclosed which compensates for a fluctuation in oscillating wavelength of a semiconductor laser source of a recording type optical disc system using a single prism having a diffraction grating with a specified pitch so as to make the beam shaping prism achromatic. Two equations are given for specifying the pitch d or d′ of the diffraction grating, depending on whether the diffraction grating is applied to the output surface or the input surface of the prism, respectively.

公开(公告)号：US06542314B2

公开(公告)日：2003-04-01

申请号：US09968873

申请日：2001-10-03

申请人： Masato Kawabata ,  Toshiaki Katsuma

发明人： Masato Kawabata ,  Toshiaki Katsuma

IPC分类号： G02B302

CPC分类号： G11B7/139 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/13922

摘要： One surface of an objective lens is provided with a zonal part which acts such that the quantity of light having a wavelength of &lgr;1 is apparently canceled in the outer peripheral portion of the luminous flux due to an interference effect, whereas the quantity of light having a wavelength of &lgr;2 in the outer peripheral part is kept as it is. The zonal part has such a step that light supposed to pass a position corresponding to the zonal part if the zonal part does not exist and light passing a position at which the zonal part is formed if the zonal part exists generate therebetween a phase difference satisfying a predetermined conditional expression. The numerical aperture at a boundary position of the step has a value between two numerical apertures for the respective wavelengths &lgr;1 and &lgr;2.

公开(公告)号：US4953958A

公开(公告)日：1990-09-04

申请号：US289379

申请日：1988-12-23

申请人： Toshiaki Katsuma ,  Nagayoshi Hirano

发明人： Toshiaki Katsuma ,  Nagayoshi Hirano

IPC分类号： G02B13/24 ,  G02B15/16

CPC分类号： G02B15/161

摘要： Described herein is a variable magnification duplicator lens system which is provided with, on the subject side of a stop, a front lens group including a 1st lens element consisting of a meniscus lens of positive power and facing the convex side thereof toward the subject, a 2nd lens element consisting of a meniscus lens of negative power facing the convex side thereof toward the subject, a 3rd lens element with positive power, and a 4th lens element with negative power, and on the image-forming side of the stop, a rear lens group including 5th, 6th, 7th, and 8th lens elements arranged symmetrically with the 1st to 4th lens elements of the front lens group, respectively. Of these lens elements, the 3rd to 6th lens elements and at least one of the 1st and 8th lens elements are movable. When shifting the whole lens system in the direction of the optical axis to vary the duplication scale, a reduced scale position is assumed by a lens position adjustment shifting the 5th and 6th lens elements into positions closer to the stop while at least shifting the 8th lens element toward the 7th lens element or shifting the 1st lens element away from the 2nd lens element, and an enlarged scale position is assumed by a lens position adjustment shifting the 3rd and 4th lens elements closer to the stop while at least shifting the 1st lens element toward the 2nd lens element or shifting the 8th lens elements away from the 7th lens element.

摘要翻译： 这里描述的是可变倍率复制透镜系统，其在停止的对象侧设置有包括正功率的弯月形透镜并且朝向被摄体的凸面侧的第一透镜元件的前透镜组， 第二透镜元件包括面向其朝向被摄体的凸面的负光焦度透镜，具有正光焦度的第三透镜元件和具有负光焦度的第四透镜元件，并且在该光阑的图像形成侧上， 透镜组包括分别与前透镜组的第1至第4透镜元件对称布置的第5,6s，第8和第八透镜元件。 在这些透镜元件中，第3至第6透镜元件和第1和第8透镜元件中的至少一个是可移动的。 当沿着光轴的方向移动整个透镜系统以改变复制刻度时，通过透镜位置调整来假定减小的刻度位置，将第5和第6透镜元件移动到更接近于停止的位置，同时至少使第8透镜 元件朝向第七透镜元件移动或将第一透镜元件移离第二透镜元件，并且通过透镜位置调整来假定放大的刻度位置，以使第三和第四透镜元件更靠近止动件，同时至少将第一透镜元件 朝向第二透镜元件或将第八透镜元件移离第七透镜元件。

公开(公告)号：US20090052056A1

公开(公告)日：2009-02-26

申请号：US12181379

申请日：2008-07-29

申请人： Toshiaki KATSUMA ,  Hajime YAMANAKA

发明人： Toshiaki KATSUMA ,  Hajime YAMANAKA

IPC分类号： G02B3/04 ,  B29D11/00

CPC分类号： C03B11/08 ,  C03B2215/49 ,  C03B2215/66 ,  Y10S359/90

摘要： A molding material is heated and pressed plural times when molded is an optical element having a radius of curvature smaller than a radius of a sphere having the same volume as the optical element. When such an optical element is molded, a closed space is formed between a molding material and a transfer surface of a mold in a state where the molding material is placed thereon. Thus, an appearance defect such as a recess is easily generated on the molded optical element. However, since the molding material is molded plural times, it is possible to place the molding materials on the transfer surfaces of the molds after a size of the closed space is adjusted so as not to generate the appearance defect prior to each heating/pressing process. Thereby, it is possible to suppress generation of an appearance defect in the molded optical element.

摘要翻译： 当模制成具有小于具有与光学元件相同体积的球体的半径的曲率半径的光学元件时，模制材料被加热和压制多次。 当这种光学元件被模制时，在模制材料被放置在其上的状态下，在模制材料和模具的转移表面之间形成封闭的空间。 因此，在模制的光学元件上容易产生诸如凹陷的外观缺陷。 然而，由于成型材料被多次模制，所以可以将模制材料放置在模具的转印表面上，在调整封闭空间的尺寸以便在每个加热/压制过程之前不产生外观缺陷 。 由此，可以抑制模制的光学元件中的外观缺陷的产生。

公开(公告)号：US07298687B2

公开(公告)日：2007-11-20

申请号：US10874388

申请日：2004-06-24

申请人： Yu Kitahara ,  Toshiaki Katsuma ,  Tetsuya Ori

发明人： Yu Kitahara ,  Toshiaki Katsuma ,  Tetsuya Ori

IPC分类号： G11B11/00

CPC分类号： G11B7/139 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical recording media objective lens is disclosed for converging either of two working lights of a first wavelength or a second wavelength. The working light of the first wavelength is converged at a first numerical aperture onto the first optical recording medium and the working light of the second wavelength is converged at a second numerical aperture onto the second optical recording medium. An aperture adjusting zonal part is included on at least one of the objective lens surfaces for apparently eliminating light at the periphery of a light flux having a wavelength λ1 while maintaining light at the periphery of a light flux having a wavelength λ2, where λ1 is one of the first and second wavelengths and λ2 is the other wavelength. The aperture adjusting zonal part is formed so as to satisfy two conditions.

摘要翻译： 公开了用于会聚第一波长或第二波长的两个工作光中的任一个的光学记录介质物镜。 第一波长的工作光在第一光学记录介质上会聚在第一数值孔径，第二波长的工作光在第二数值孔径处会聚在第二光学记录介质上。 在至少一个物镜表面上包括孔径调节区带部分，用于明显地消除具有波长λ1的光束周围的光，同时保持具有 波长λ2，其中λ1是第一和第二波长中的一个，λ2是另一个波长。 孔径调节区域形成为满足两个条件。