公开(公告)号：US08776631B2

公开(公告)日：2014-07-15

申请号：US12968447

申请日：2010-12-15

申请人： Masatoshi Hada ,  Hitoshi Oya ,  Kentarou Nakamura ,  Hiroyuki Momota ,  Takao Mori

发明人： Masatoshi Hada ,  Hitoshi Oya ,  Kentarou Nakamura ,  Hiroyuki Momota ,  Takao Mori

IPC分类号： F16H63/32 ,  F16H57/04

CPC分类号： F16H63/32 ,  F16H57/0432 ,  F16H57/0468 ,  Y10T74/2014 ,  Y10T74/20177 ,  Y10T74/20183

摘要： A transmission shift fork engages with a coupling sleeve of a synchronizer and shifting the coupling sleeve. The transmission shift fork includes a first part, second part, and at least one fin. The first part is arranged to movably mount the transmission shift fork in a shift fork movement direction. The second part includes a coupling sleeve facing surface, an outwardly facing surface, and a pair of shift-direction facing surfaces. The coupling sleeve facing surface includes at least one coupling sleeve engagement part arranged to engage with an engaging groove formed on an external circumferential surface of the coupling sleeve. The outwardly facing surface includes an oil catch disposed in a position with respect to the coupling sleeve engagement part such that the oil catch captures lubricating oil and supplies to the coupling sleeve engagement part. The fin projects from inside an oil receiving recess defined by the oil catch.

摘要翻译： 变速器换档拨叉与同步器的联接套接合并且移动联接套筒。 换档拨叉包括第一部分，第二部分和至少一个散热片。 第一部分被布置成以变速叉移动方向可移动地安装变速器换档拨叉。 第二部分包括面向连接套的表面，面向外的表面和一对换向方向的表面。 联接套筒相对表面包括至少一个联接套接合部分，其布置成与形成在联接套筒的外周表面上的接合槽接合。 向外的表面包括设置在相对于联接套筒接合部分的位置的油捕集器，使得油捕获器捕获润滑油并将其供应到联接套筒接合部分。 从石油捕捞中定义的油接收槽内部的翅片项目。

公开(公告)号：US08339923B2

公开(公告)日：2012-12-25

申请号：US13139697

申请日：2009-12-15

申请人： Kentarou Nakamura

发明人： Kentarou Nakamura

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G02B5/18 ,  G02B5/1895 ,  G02B13/0025 ,  G02B13/0055 ,  G02B27/30 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

摘要： Provided is an objective optical element which can appropriately correct degradation from spherical aberration upon fluctuation of a light source wavelength while maintaining light use efficiency, just by changing the magnification of the objective optical element, and which can record/reproduce information to/from different optical discs. Also provided is an optical pickup device using the objective optical element. When a light flux having two different wavelengths λ11, λ12 (wherein λ11 ΔSA3>ΔSA5>0 (1).

摘要翻译： 提供了一种物镜光学元件，其可以通过改变物镜光学元件的倍率来适当地校正光源波长的波动时的球面像差的降低，同时保持光的使用效率，并且可以从/不同的光学元件记录/再现信息 光盘 还提供了使用物镜光学元件的光学拾取装置。 当波长λ1范围内具有两个不同波长λ11，λ12（其中λ11<λ12和λ12-λ11= 5nm）的光束被引入物镜光学元件以测量波前像差时，以下三阶和五阶 获得单位为λrms的球面像差：SA3（λ11），SA5（λ11），SA3（λ12），SA5（λ12）。 如果＆Dgr; SA3 = | SA3（λ12）-SA3（λ11）|，＆Dgr; SA5 = | SA5（λ12）-SA5（λ11）|，则满足以下表达式：0.18>＆Dgr; SA3>＆Dgr; SA5> 0 （1）。

公开(公告)号：US20100284262A1

公开(公告)日：2010-11-11

申请号：US12840273

申请日：2010-07-20

申请人： Kentarou Nakamura ,  Kohei Ota ,  Nobuyoshi Mori ,  Eiji Nomura

发明人： Kentarou Nakamura ,  Kohei Ota ,  Nobuyoshi Mori ,  Eiji Nomura

IPC分类号： G11B7/135

CPC分类号： G11B7/1374 ,  G02B3/08 ,  G02B27/42 ,  G02B27/4238 ,  G02B27/4283 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup apparatus according to the present invention includes: a first light source for emitting a first light flux; a second light source for emitting a second light flux; a third light source for emitting-a third light flux; and an objective optical element. The objective optical element has an optical surface including at least two areas provided with optical path difference providing structures. The objective optical element converges the first to third light fluxes each passing through the predetermined areas on the objective optical element onto respective information recording surfaces of the first to third optical disks. The optical pickup apparatus provides a wavelength dependency of a spherical aberration so as to correct a change in a spherical aberration due to a refractive index change with a temperature change of the objective optical element.

摘要翻译： 根据本发明的光拾取装置包括：用于发射第一光通量的第一光源; 用于发射第二光通量的第二光源; 用于发射第三光通量的第三光源; 和物镜光学元件。 物镜光学元件具有包括设置有光程差提供结构的至少两个区域的光学表面。 物镜光学元件将通过物镜光学元件上的预定区域的第一至第三光束会聚到第一至第三光盘的相应信息记录表面上。 光学拾取装置提供球面像差的波长依赖性，以便校正由于物镜光学元件的温度变化引起的折射率变化引起的球面像差的变化。

公开(公告)号：US20100260031A1

公开(公告)日：2010-10-14

申请号：US12680194

申请日：2008-09-26

申请人： Yuki Ono ,  Kohei Ota ,  Kentarou Nakamura

发明人： Yuki Ono ,  Kohei Ota ,  Kentarou Nakamura

IPC分类号： G11B7/00

CPC分类号： G02B3/08 ,  G02B3/04 ,  G11B7/1374

摘要： Provided is an objective lens for an optical pickup apparatus. The objective lens collects diffracted light generated by an optical path difference giving structure onto the information recording surface of an optical information recording medium as a spot and suppresses fluctuation of diffraction efficiency due to a change of using wavelength. The optical pickup apparatus using such objective lens is also provided. The total diffraction efficiency can be improved by adjusting a wavelength at which the diffraction efficiencies of a plurality of basic structures forming the optical path difference giving structure in the objective lens are maximum, in accordance with a basic structure.

摘要翻译： 提供了一种用于光学拾取装置的物镜。 物镜将由光程差赋予结构产生的衍射光聚集到光信息记录介质的信息记录表面上作为点，并且抑制由于使用波长的变化引起的衍射效率的波动。 还提供了使用这种物镜的光学拾取装置。 根据基本结构，可以通过调整形成物镜中的光程差赋予结构的多个基本结构的衍射效率最大的波长来提高总的衍射效率。

公开(公告)号：US20080013415A1

公开(公告)日：2008-01-17

申请号：US11822980

申请日：2007-07-11

申请人： Eiji Nomura ,  Kentarou Nakamura

发明人： Eiji Nomura ,  Kentarou Nakamura

IPC分类号： G11B7/00

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

摘要： An optical pickup apparatus comprises: a first light source for emitting a first light flux; a second light source for emitting a second light flux; a third light source for emitting a third light flux; and an objective optical element. The objective optical element comprises an optical surface comprising a central area and a peripheral area. The central area comprises a first optical path difference providing structure, and the peripheral area comprises a second optical path difference providing structure. The objective optical element converges the third light flux which passes through the central area of on the third optical disk. The objective optical element converges the first and second light fluxes which pass through the peripheral area on the first optical disk. Each of the first and second optical path difference providing structures comprises a predetermined basic structure.

公开(公告)号：US20080013412A1

公开(公告)日：2008-01-17

申请号：US11822981

申请日：2007-07-11

申请人： Eiji Nomura ,  Kentarou Nakamura

发明人： Eiji Nomura ,  Kentarou Nakamura

IPC分类号： G11B5/09

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

摘要： An optical pickup apparatus comprises: a first light source; a second light source; a third light source; and an objective optical element. The objective optical element comprises at least two areas comprising first and second optical path difference providing structures. A third light flux from the third light source passing the first optical path difference providing structure forms first and second best focuses. The third light flux passing the objective optical element forms a spot comprising a central spot portion; an intermediate spot portion; and a peripheral spot portion. The central spot portion is used for recording and/or reproducing information for a third optical disk, and the intermediate and peripheral spot portions are not used for recording and/or reproducing information for the third optical disk. The peripheral spot portion is formed on the third optical disk by the third light flux through the second optical path difference providing structure.

公开(公告)号：US08760990B2

公开(公告)日：2014-06-24

申请号：US13884890

申请日：2011-11-09

申请人： Hideki Tanaka ,  Kentarou Nakamura ,  Kiyono Tateyama

发明人： Hideki Tanaka ,  Kentarou Nakamura ,  Kiyono Tateyama

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G02B27/0025 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup apparatus including an objective lens capable of enhancing temperature characteristics and wavelength characteristics, and which enables compatibility for three types of optical discs of BDs, DVDs, and CDs by using the objective lens in common, an optical information recording and reproducing apparatus, and an objective lens suitable for it. In a first optical path difference providing structure in which at least a first basic structure and a second basic structure are superimposed on each other, an amount of a level difference in an optical axis direction can be reduced, whereby it becomes possible to suppress the lowering of a diffraction efficiency when wavelength changes. Further, in the first basic structure and the second basic structure deterioration of the spherical aberration due to the change of the refractive index of the objective lens can be corrected by utilizing a phenomenon that the wavelength of the light source rises similarly due to a rise in the environmental temperature.

摘要翻译： 一种光拾取装置，包括能够增强温度特性和波长特性的物镜，并且通过共同使用物镜实现BD，DVD和CD的三种类型的光盘的兼容性，光信息记录和再现装置， 和适合它的物镜。 在其中至少第一基本结构和第二基本结构彼此叠置的第一光程差提供结构中，可以减小光轴方向上的电平差的量，从而可以抑制下降 的波长变化时的衍射效率。 此外，在第一基本结构和第二基本结构中，由于物镜的折射率的变化引起的球面像差的劣化可以通过利用由于光源的波长类似地上升的现象来校正 环境温度。

公开(公告)号：US08406111B2

公开(公告)日：2013-03-26

申请号：US13056256

申请日：2009-07-21

申请人： Kiyono Tateyama ,  Kentarou Nakamura

发明人： Kiyono Tateyama ,  Kentarou Nakamura

IPC分类号： G11B7/135

CPC分类号： G11B7/1275 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

摘要： Provided are an objective lens with enhanced transmittance and an optical pickup apparatus which can record and/or reproduce information properly for three kinds of discs with different recording densities, even if a single lens is used as the objective lens. When all the expressions (1) to (3) are satisfied, excellent aberration characteristics can be obtained for the three kinds of discs: −0.02≦m1≦0.02 (1); 0≦(WD1−WD2)≦1.57 m2+0.123 or 1.57 m2+0.24≦(WD1−WD2)≦0.7 (2); and 0≦(WD1−WD3)≦1.79 m3+0.333 or 1.66 m3+0.508≦(WD1−WD3)≦0.7 (3).

摘要翻译： 提供了具有增强的透射率的物镜和可以适当地记录和/或再现具有不同记录密度的三种盘的信息的光学拾取装置，即使使用单个透镜作为物镜。 当满足所有表达式（1）至（3）时，可以获得三种光盘的优异的像差特性：-0.02＆nlE; m1＆nlE; 0.02（1）; 0＆nlE;（WD1-WD2）＆nlE; 1.57m2 + 0.123或1.57m2 + 0.24＆nlE;（WD1-WD2）＆nlE; 0.7（2）; 和0＆nlE;（WD1-WD3）＆nlE; 1.79m3 + 0.333或1.66m3 + 0.508＆nlE;（WD1-WD3）＆N1; 0.7（3）。

公开(公告)号：US08023389B2

公开(公告)日：2011-09-20

申请号：US12773588

申请日：2010-05-04

申请人： Kentarou Nakamura

发明人： Kentarou Nakamura

IPC分类号： G11B7/00

CPC分类号： G11B7/13922 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1376 ,  G11B7/13925 ,  G11B2007/0006

摘要： An objective lens relating to the present invention includes a first optical path difference providing structure in which a first basic structure and a second basic structure are overlapped with each other. The first basic structure is a blaze-type structure which emits a Xth-order diffracted light flux, when the first light flux passes through the first basic structure, where the value of X is an odd integer. At least a part of the first basic structure arranged around an optical axis includes a step facing an opposite direction to the optical axis. The second basic structure is a blaze-type structure which emits a Lth-order diffracted light flux, when the first light flux passes through the second basic structure, where the value of L is an even integer. At least a part of the second basic structure arranged around the optical axis includes a step facing the optical axis.

摘要翻译： 涉及本发明的物镜包括第一光程差提供结构，其中第一基本结构和第二基本结构彼此重叠。 第一基本结构是当第一光通量通过第一基本结构时，其X值为奇整数，发射X级衍射光束的火焰型结构。 围绕光轴布置的第一基本结构的至少一部分包括面向与光轴相反的方向的台阶。 第二基本结构是当第一光束通过第二基本结构时发射L级衍射光束的火焰型结构，其中L的值是偶数整数。 围绕光轴布置的第二基本结构的至少一部分包括面向光轴的台阶。

公开(公告)号：US20110085433A1

公开(公告)日：2011-04-14

申请号：US12999856

申请日：2009-06-01

申请人： Kyu Takada ,  Kiyono Tateyama ,  Kentarou Nakamura

发明人： Kyu Takada ,  Kiyono Tateyama ,  Kentarou Nakamura

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G02B3/04 ,  G02B5/1895 ,  G11B7/1374 ,  G11B7/13922

摘要： Provided are an optical pickup apparatus and an objective lens which can record and/or reproduce information for discs with different recording densities and can realize simplification of the structure of themselves and reducing cost. When the expression (1) is satisfied, step differences of a step structure can be further reduced than those in the case that d1=λ1(n−1) holds, and fine grooves corresponding to a steps structure, formed on an optical-surface transfer surface of a mold for molding the objective lens become shallow, to be easily processed. In addition, the moldability is enhanced because the material of the objective lens easily enters the inner portion of the grooves. Further, a fluctuation of a diffraction efficiency caused when wavelength of a light flux changes or temperature changes is reduced so that information can be recorded and/or reduced stably.

摘要翻译： 提供一种能够记录和/或再现具有不同记录密度的盘的信息的光学拾取装置和物镜，并且可以实现其自身的结构的简化并降低成本。 当满足表达式（1）时，阶梯结构的步长差可以比在d1 =λ1（n-1）成立的情况下的阶梯差更进一步降低，并且形成在光学表面上的与阶梯结构相对应的细槽 用于模制物镜的模具的转印表面变浅，易于加工。 此外，由于物镜的材料容易进入槽的内部，所以成型性得到提高。 此外，当光束波长变化或温度变化时引起的衍射效率的波动减小，从而可以稳定地记录和/或降低信息。