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1. 发明授权

US08705331B2 Optical element and objective lens through which a plurality of light beams having different design wavelengths pass 有权
标题翻译：具有不同设计波长的多个光束通过的光学元件和物镜
公开(公告)号：US08705331B2
公开(公告)日：2014-04-22
申请号：US13311671
申请日：2011-12-06
申请人： Koichi Maruyama , Yoshiyuki Tashiro , Daisuke Koreeda
发明人： Koichi Maruyama , Yoshiyuki Tashiro , Daisuke Koreeda
IPC分类号： G11B7/135
CPC分类号： G11B7/1367 , G02B27/42 , G02B27/4238 , G02B27/4294 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： A method of designing an optical element to be used for an optical system in which each of a plurality of light beams having different design wavelengths passes through the optical element is provided. The method includes determining at least two types of optical path difference functions including first and second optical path difference functions in such a manner that proportion, brought by the first optical path difference function, between diffraction orders at which diffraction efficiencies of the plurality of light beams are maximized is different from proportion, brought by the second optical path difference function, between diffraction orders at which diffraction efficiencies of the plurality of light beams are maximized, and obtaining a shape defined by combining the at least two types of optical path difference functions so as to apply the obtained shape to at least one surface of surfaces of the optical element.
摘要翻译：提供一种设计用于光学系统的光学元件的方法，其中具有不同设计波长的多个光束中的每一个通过光学元件。该方法包括确定包括第一和第二光程差函数的至少两种类型的光程差函数，使得由第一光程差函数带来的比例在衍射级之间，衍射级之间的多个光束的衍射效率最大化不同于由第二光程差函数引起的比例，在多个光束的衍射效率最大化的衍射级之间，并且获得通过组合至少两种类型的光程差函数而定义的形状以将获得的形状施加到光学元件的表面的至少一个表面。

2. 发明授权

US07830772B2 Objective optical system and optical information recording/reproducing device having the same 有权
标题翻译：物镜光学系统和具有该光学系统的光学信息记录/再现装置
公开(公告)号：US07830772B2
公开(公告)日：2010-11-09
申请号：US12194081
申请日：2008-08-19
申请人： Yoshiyuki Tashiro , Daisuke Koreeda , Shuichi Takeuchi
发明人： Yoshiyuki Tashiro , Daisuke Koreeda , Shuichi Takeuchi
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/13922 , G11B2007/0006
摘要： There is provided an objective optical system for an optical information recording/reproducing device. The objective optical system includes an optical element having an annular zone structure on at least one surface. The annular zone structure includes annular zones configured to have at least one step formed, at a boundary between adjacent ones of the annular zones, to extend in a direction of an optical axis. The at least one step is provided to cause a predetermined optical path length difference between a light beam passing through an outside of the boundary and a light beam passing through an inside of the boundary. The predetermined optical path length difference given to a first light beam by the at least one step is approximately equal to an odd multiple of a first wavelength λa. Abbe number of material of the optical element satisfies a condition of 15
摘要翻译：提供了一种用于光信息记录/再现装置的物镜光学系统。物镜光学系统包括在至少一个表面上具有环形区域结构的光学元件。环形区域结构包括环形区域，其被配置为具有在相邻环形区域之间的边界处形成的沿着光轴方向延伸的至少一个台阶。提供至少一个步骤以使通过边界外侧的光束和通过边界内部的光束之间的预定光程长度差。通过至少一个步骤给予第一光束的预定光程长度差近似等于第一波长λa的奇数倍。光学元件的阿贝数量满足15 <＆gt; d <35的条件。

3. 发明授权

US07738345B2 Optical disc drive and objective lens for the same 失效
标题翻译：光盘驱动器和物镜相同
公开(公告)号：US07738345B2
公开(公告)日：2010-06-15
申请号：US11456943
申请日：2006-07-12
申请人： Daisuke Koreeda , Koichi Maruyama , Shuichi Takeuchi , Yoshiyuki Tashiro
发明人： Daisuke Koreeda , Koichi Maruyama , Shuichi Takeuchi , Yoshiyuki Tashiro
IPC分类号： G11B7/00
CPC分类号： G11B7/1374 , G11B2007/0006
摘要： There is provided an objective lens used for three types of optical discs including by selectively using one of three types of light beams. At least one of surfaces of the objective lens is provided with a first region converging the third light beam on a recoding surface of the third optical disc. The first region has a step structure configured to have concentric refractive surface zones and to give an optical path length difference to an incident beam at each step formed between adjacent refractive surface zones. The step structure is configured such that the optical path length difference given by each step is substantially equal to an odd multiple of a wavelength of a first light beam, and a value of differentiation of an optical path difference function defining the step structure crosses zero in a height ranging from 30% to 70% of an effective diameter of the first region.
摘要翻译：提供了一种用于三种类型的光盘的物镜，包括通过选择性地使用三种类型的光束之一。物镜的至少一个表面设置有将第三光束会聚在第三光盘的记录表面上的第一区域。第一区域具有构造成具有同心折射表面区域并且在相邻折射表面区域之间形成的每个台阶处的入射光束的光程长度差异的台阶结构。台阶结构被配置为使得由每个步骤给出的光程长度差基本上等于第一光束的波长的奇数倍，并且限定步骤结构的光程差函数的微分值在零高度为第一区域的有效直径的30％至70％。

4. 发明申请

US20090080319A1 OBJECTIVE OPTICAL SYSTEM AND OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE HAVING THE SAME 审中-公开
公开(公告)号：US20090080319A1
公开(公告)日：2009-03-26
申请号：US12233048
申请日：2008-09-18
申请人： Daisuke KOREEDA , Shuichi TAKEUCHI , Yoshiyuki TASHIRO
发明人： Daisuke KOREEDA , Shuichi TAKEUCHI , Yoshiyuki TASHIRO
IPC分类号： G11B7/00
CPC分类号： G11B7/1275 , G11B7/1367 , G11B7/13922 , G11B2007/0006
摘要： There is provided an objective optical system including an optical element having a phase shift structure, and a single-element objective lens made of resin, wherein the phase shift structure includes a plurality of refractive surface zones, the phase shift structure includes a first area to contribute to converging at least the third light beam on a record surface of the third optical disc, the first area includes at least two types of steps, each of which is formed at a boundary between adjacent ones of the plurality of refractive surface zones, the at least two types of steps gives optical path length differences different from each other to an incident light beam, the annular zone structure satisfies following conditions: 0.01

5. 发明授权

US08068401B2 Objective optical system and optical information recording/reproducing device having the same 有权
标题翻译：物镜光学系统和具有该光学系统的光学信息记录/再现装置
公开(公告)号：US08068401B2
公开(公告)日：2011-11-29
申请号：US12357462
申请日：2009-01-22
申请人： Daisuke Koreeda , Shuichi Takeuchi , Yoshiyuki Tashiro
发明人： Daisuke Koreeda , Shuichi Takeuchi , Yoshiyuki Tashiro
IPC分类号： G11B7/00
CPC分类号： G11B7/1374 , G11B7/1353 , G11B7/1367 , G11B7/13922 , G11B2007/0006
摘要： There is provided an objective optical system used for information recording/reproducing for three types of optical discs. The objective optical system includes an objective lens, and a diffraction structure formed on an optical surface. The diffraction structure includes a first area for contributing to converging the third light beam. The first area includes first and second steps defined by first and second optical path difference functions, respectively. The first step is configured such that diffraction orders at which diffraction efficiencies for the first, second and third light beams are maximized are 1st order, 0-th order and 0-th order, respectively. The first step satisfies a condition: −0.36×102
摘要翻译：提供了用于三种类型的光盘的信息记录/再现的物镜光学系统。物镜光学系统包括物镜和形成在光学表面上的衍射结构。衍射结构包括用于有助于会聚第三光束的第一区域。第一区域包括分别由第一和第二光程差函数限定的第一和第二步骤。第一级被配置为使得第一，第二和第三光束的衍射效率最大化的衍射级分别为1级，0级和0级。第一步满足条件：-0.36×102

6. 发明授权

US08004955B2 Coupling lens and optical information recording/reproducing device having the same 有权
标题翻译：耦合透镜和具有其的光信息记录/再现装置
公开(公告)号：US08004955B2
公开(公告)日：2011-08-23
申请号：US12251795
申请日：2008-10-15
申请人： Yoshiyuki Tashiro , Shuichi Takeuchi
发明人： Yoshiyuki Tashiro , Shuichi Takeuchi
IPC分类号： G11B7/00
CPC分类号： G11B7/1378 , G11B7/13922 , G11B2007/0006
摘要： There is provided a coupling lens used in an optical information recording/reproducing device for recording information to and/or reproducing information from an optical disc. The coupling lens includes a first surface and a second surface, wherein the coupling lens is configured to satisfy a following condition (1): −0.80≦Z≦0.40 (1), wherein a value Z is obtained from a following equation (E1): Z = ⅆ ⅆ n ⁢ ( L ′ ) L ′ = ( A - B ) ( D - E ) - ( F - G ) ( H - I ) . ( E1 )
摘要翻译：提供了一种用于光信息记录/再现装置中用于向光盘记录信息和/或从光盘再现信息的耦合透镜。耦合透镜包括第一表面和第二表面，其中耦合透镜被配置为满足以下条件（1）：-0.80＆lt; lE; Z＆nlE; 0.40（1）其中，从以下等式（E1 ）：Z =ⅆⅆn（L'）L'=（A-B）（D-E） - （F-G）（H-I）。（E1）

7. 发明授权

US07872958B2 Optical information recording/reproducing device, optical element for the same, and design method of the same 失效
标题翻译：光信息记录/再现装置，用于其的光学元件及其设计方法
公开(公告)号：US07872958B2
公开(公告)日：2011-01-18
申请号：US11752386
申请日：2007-05-23
申请人： Yoshiyuki Tashiro , Daisuke Koreeda , Koichi Maruyama
发明人： Yoshiyuki Tashiro , Daisuke Koreeda , Koichi Maruyama
IPC分类号： G11B7/135
CPC分类号： G11B7/1374 , G11B7/1275 , G11B7/1353 , G11B7/13922 , G11B2007/0006
摘要： In an optical information recording/reproducing device which executes information reading or writing on multiple types of optical discs having different data densities by selectively using first through third light beams having first through third wavelengths, respectively, at least one side of an optical element is provided with a step structure including a plurality of concentric refracting surfaces and steps between them. The steps include first steps each giving a first optical path length difference specified by a first optical path difference function, second steps each giving a second optical path length difference specified by a second optical path difference function, and special steps each giving an optical path length difference obtained by the sum or difference of/between the first and second optical path length differences. Annular zone widths between adjacent steps are set at 10 times the first wavelength or more.
摘要翻译：在通过选择性地使用具有第一至第三波长的第一至第三光束执行信息读取或写入具有不同数据密度的多种类型的光盘的光学信息记录/再现装置中，分别提供光学元件的至少一侧具有包括多个同心折射表面和它们之间的台阶的台阶结构。这些步骤包括第一步骤，每个步骤给出由第一光程差函数指定的第一光程长度差，每个给出由第二光程差函数指定的第二光程长度差的第二步，以及各自给出光程长度通过第一和第二光程长度差的和/之差获得的差。相邻步骤之间的环带宽度设定为第一波长的10倍以上。

8. 发明申请

US20090185472A1 Objective Optical System and Optical Information Recording/Reproducing Device Having the Same 有权
标题翻译：目标光学系统和具有相同功能的光信息记录/再现设备
公开(公告)号：US20090185472A1
公开(公告)日：2009-07-23
申请号：US12357462
申请日：2009-01-22
申请人： Daisuke KOREEDA , Shuichi TAKEUCHI , Yoshiyuki TASHIRO
发明人： Daisuke KOREEDA , Shuichi TAKEUCHI , Yoshiyuki TASHIRO
IPC分类号： G11B7/00
CPC分类号： G11B7/1374 , G11B7/1353 , G11B7/1367 , G11B7/13922 , G11B2007/0006
摘要： There is provided an objective optical system used for information recording/reproducing for three types of optical discs. The objective optical system includes an objective lens, and a diffraction structure formed on an optical surface. The diffraction structure includes a first area for contributing to converging the third light beam. The first area includes first and second steps defined by first and second optical path difference functions, respectively. The first step is configured such that diffraction orders at which diffraction efficiencies for the first, second and third light beams are maximized are 1st order, 0-th order and 0-th order, respectively. The first step satisfies a condition: −0.36×102
摘要翻译：提供了用于三种类型的光盘的信息记录/再现的物镜光学系统。物镜光学系统包括物镜和形成在光学表面上的衍射结构。衍射结构包括用于有助于会聚第三光束的第一区域。第一区域包括分别由第一和第二光程差函数限定的第一和第二步骤。第一级被配置为使得第一，第二和第三光束的衍射效率最大化的衍射级分别为1级，0级和0级。第一步满足条件：<？in-line-formula description =“In-line Formulas”end =“lead”？> - 0.36x102 第二步被配置为使得第一，第二和第三光束的衍射效率最大化的衍射级是第二级，第一级和第一顺序。

9. 发明申请

US20090052307A1 OBJECTIVE OPTICAL SYSTEM AND OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE HAVING THE SAME 有权
标题翻译：目标光学系统和光信息记录/再生装置
公开(公告)号：US20090052307A1
公开(公告)日：2009-02-26
申请号：US12194081
申请日：2008-08-19
申请人： Yoshiyuki TASHIRO , Daisuke KOREEDA , Shuichi TAKEUCHI
发明人： Yoshiyuki TASHIRO , Daisuke KOREEDA , Shuichi TAKEUCHI
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/13922 , G11B2007/0006
摘要： There is provided an objective optical system for an optical information recording/reproducing device. The objective optical system includes an optical element having an annular zone structure on at least one surface. The annular zone structure includes annular zones configured to have at least one step formed, at a boundary between adjacent ones of the annular zones, to extend in a direction of an optical axis. The at least one step is provided to cause a predetermined optical path length difference between a light beam passing through an outside of the boundary and a light beam passing through an inside of the boundary. The predetermined optical path length difference given to a first light beam by the at least one step is approximately equal to an odd multiple of a first wavelength λa. Abbe number of material of the optical element satisfies a condition of 15
摘要翻译：提供了一种用于光信息记录/再现装置的物镜光学系统。物镜光学系统包括在至少一个表面上具有环形区域结构的光学元件。环形区域结构包括环形区域，其被配置为具有在相邻环形区域之间的边界处形成的沿着光轴方向延伸的至少一个台阶。提供至少一个步骤以使通过边界外侧的光束和通过边界内部的光束之间的预定光程长度差。通过至少一个步骤给予第一光束的预定光程长度差近似等于第一波长λa的奇数倍。光学元件的阿贝数量满足15

10. 发明申请

US20070070860A1 OPTICAL DISC DRIVE AND OBJECTIVE LENS FOR THE SAME 有权
标题翻译：光盘驱动器和目标镜头
公开(公告)号：US20070070860A1
公开(公告)日：2007-03-29
申请号：US11536004
申请日：2006-09-28
申请人： Daisuke KOREEDA , Koichi MARUYAMA , Shuichi TAKEUCHI , Yoshiyuki TASHIRO
发明人： Daisuke KOREEDA , Koichi MARUYAMA , Shuichi TAKEUCHI , Yoshiyuki TASHIRO
IPC分类号： G11B7/135
CPC分类号： G11B7/1374 , G11B7/1275 , G11B7/13922 , G11B2007/0006
摘要： There is provided an optical disc drive for recordation/reproduction for three types of optical discs by selectively using one of three types of light beams. The optical disc drive comprises an objective lens. The objective lens has a step structure which gives an optical path length difference to an incident beam at each step. When the third laser beam passes through the objective lens, the objective lens produces normal diffraction order light converging to a recording surface of the third optical disc and undesired diffraction order light converging to a point deviating from the recording surface of the third optical disc. A distance from a point to which the normal diffraction order light converges to a point to which the undesired diffraction order light converges is larger than or equal to twice a pull-in range of a focus error signal obtained when the third optical disc is used.
摘要翻译：通过选择性地使用三种类型的光束之一，提供了用于三种类型的光盘的记录/再现的光盘驱动器。光盘驱动器包括物镜。物镜具有在每个步骤中给入射光束的光程长度差的阶梯结构。当第三激光束通过物镜时，物镜产生会聚到第三光盘的记录表面的正常衍射级光，并且不期望的衍射级光会聚到偏离第三光盘的记录表面的点。从法线衍射级光收敛到不期望的衍射级光会聚的点的距离大于或等于当使用第三光盘时获得的聚焦误差信号的拉入范围的两倍。

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