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41. 发明授权

US07839752B2 Optical disc drive and objective lens for the same 有权
标题翻译：光盘驱动器和物镜相同
公开(公告)号：US07839752B2
公开(公告)日：2010-11-23
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。

42. 发明授权

US07468942B2 Optical pickup, optical element, and information reproducing apparatus configured for use with any of plural types of recording media 失效
标题翻译：配置为与多种类型的记录介质中的任何一种配合使用的光学拾取器，光学元件和信息再现装置
公开(公告)号：US07468942B2
公开(公告)日：2008-12-23
申请号：US10840479
申请日：2004-05-07
申请人： Katsuhiro Koike , Koichi Maruyama , Shuichi Takeuchi
发明人： Katsuhiro Koike , Koichi Maruyama , Shuichi Takeuchi
IPC分类号： G11B7/135
CPC分类号： G11B7/1275 , G11B7/1378 , G11B7/13922 , G11B2007/0006
摘要： An optical pickup has a light source for emitting a plurality of laser beams with different wavelengths; and an objective lens for focusing the laser beams emitted from the light source on recording surfaces of plural types of information recording media. A diffractive lens structure is provided in a light path of the laser beam, the structure including ring zone areas divided by a plurality of phase steps for correcting a wavefront aberration of the laser beam, a diameter of an outermost phase step of the diffractive lens structure is smaller than a second largest effective diameter of effective diameters required for reproduction of the plural types of information recording media.
摘要翻译：光拾取器具有用于发射具有不同波长的多个激光束的光源; 以及用于将从光源发射的激光束聚焦在多种类型的信息记录介质的记录表面上的物镜。衍射透镜结构设置在激光束的光路中，该结构包括由用于校正激光束的波前像差的多个相位分割的环区域，衍射透镜结构的最外相阶段的直径小于再现多种类型的信息记录介质所需的有效直径的第二大有效直径。

43. 发明授权

US07239598B2 Objective lens for optical pick-up 有权
标题翻译：物镜用于光学拾取
公开(公告)号：US07239598B2
公开(公告)日：2007-07-03
申请号：US10867736
申请日：2004-06-16
申请人： Koichi Maruyama , Daisuke Koreeda
发明人： Koichi Maruyama , Daisuke Koreeda
IPC分类号： G11B7/00
CPC分类号： G11B7/1367 , G11B7/1275 , G11B7/1353 , G11B7/1374 , G11B2007/0006
摘要： There is provided an objective lens for an optical pick-up which is used to record/reproduce data to/from at least three types of optical discs. Thicknesses t1, t2 and t3 of cover layers of first, second third optical discs are t1≅0.6 mm, t2≅0.6 mm, and t3≅1.2 mm. Numerical apertures NA1, NA2 and NA3 for the first, second and third optical discs satisfy a relationship NA1≧NA2>NA3. When the first optical disc is used, a substantially collimated light beam is incident on the objective lens. When the second or third optical disc is used, a diverging beam is incident on the objective lens. With regard to magnifications M1, M2 and M3 and focal lengths f1, f2 and f3 of the objective lens for the first, second and third optical discs, the following conditions (1), (2) and (3) are satisfied: −0.02
摘要翻译：提供了用于光学拾取器的物镜，其用于向/从至少三种类型的光盘记录/再现数据。第一，第二三个光盘的覆盖层的厚度t 1，t 2和t 3分别为t 1≅0.6mm，t 2≅0.6 mm，t 3≅1.2mm。第一，第二和第三光盘的数值孔径NA 1，NA 2和NA 3满足关系NA 1> = NA 2> NA 3。当使用第一光盘时，基本上准直的光束入射到物镜上。当使用第二或第三光盘时，发散光束入射到物镜上。关于用于第一，第二和第三光盘的物镜的放大率M 1，M 2和M 3以及焦距f 1，f 2和f 3，以下条件（1），（2）和（3 ）满足：<？in-line-formula description =“In-line formula”end =“lead”？> - 0.02 <？in-line-formula description =“In-line Formulas”end =“lead”？> - 0.10 <？in-line-formula description =”In-line Formulas“end =”lead“？> - 0.29

44. 发明申请

US20070014211A1 OPTICAL DISC DRIVE AND OBJECTIVE LENS FOR THE SAME 失效
标题翻译：光盘驱动器和目标镜头
公开(公告)号：US20070014211A1
公开(公告)日：2007-01-18
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％。

45. 发明授权

US07054254B2 High NA objective lens for optical pick-up 有权
公开(公告)号：US07054254B2
公开(公告)日：2006-05-30
申请号：US10244669
申请日：2002-09-17
申请人： Koichi Maruyama
发明人： Koichi Maruyama
IPC分类号： G11B7/135
CPC分类号： G11B7/1374 , G11B7/0956 , G11B7/13927
摘要： A single-element objective lens is employed in an optical pick-up. The objective lens directs an incident light beam to a data recording surface of an optical disc through a cover layer to form a beam spot thereon. A numerical aperture of the objective lens is 0.7 or more. The objective lens is configured such that a characteristic of aberration which is generated due to decentering of surfaces of the objective lens is substantially comparable to a characteristic of aberration due to an inclination of an optical axis of the objective lens and an inclination of a central axis of the light beam incident on the data recording surface of the optical disc with respect to the optical disc.

46. 发明授权

US07038862B2 Objective lens for optical pick-up 失效
标题翻译：物镜用于光学拾取
公开(公告)号：US07038862B2
公开(公告)日：2006-05-02
申请号：US10867781
申请日：2004-06-16
申请人： Koichi Maruyama , Daisuke Koreeda
发明人： Koichi Maruyama , Daisuke Koreeda
IPC分类号： G02B3/02
CPC分类号： G11B7/1374 , G02B5/188 , G02B5/1895 , G02B13/146 , G02B27/0037 , G02B27/4238 , G11B7/1353 , G11B2007/0006
摘要： An objective lens that satisfies conditions: −0.02
摘要翻译：满足条件的物镜：<？in-line-formula description =“In-line formula”end =“lead”？> - 0.02 <？in-line-formula description =”In-line Formulas“end =”lead“？> - 0.02 <？in-line-formula description =“In-line Formulas”end =“lead”？> - 0.29 物镜的透镜表面中的至少一个包括具有用于将第三光束会聚的第一区域的衍射结构第三光盘的数据记录层。第一区域内的衍射结构被配置为使得第一光束的衍射效率最大化的衍射级为六阶，第二光束的衍射效率最大化的衍射级为四阶，并且第三光束的衍射效率最大化的衍射级是三阶。

47. 发明授权

US06898024B2 Optical system for optical pickup employing coma compensating element 失效
标题翻译：光学拾取采用昏迷补偿元件的光学系统
公开(公告)号：US06898024B2
公开(公告)日：2005-05-24
申请号：US10268802
申请日：2002-10-11
申请人： Shuichi Takeuchi , Koichi Maruyama , Takeshi Shimano
发明人： Shuichi Takeuchi , Koichi Maruyama , Takeshi Shimano
IPC分类号： G02B13/00 , G02B13/18 , G02B27/00 , G11B7/09 , G11B7/095 , G11B7/135 , G11B7/00
CPC分类号： G02B27/0025
摘要： A coma compensating element has two refraction surfaces. The refraction surfaces provide, as a whole, no aberration with respect to rays perpendicularly incident thereon, while the refraction surfaces provide coma with respect to rays obliquely incident thereon.
摘要翻译：昏迷补偿元件有两个折射面。折射表面总体上没有提供相对于垂直入射到其上的光线的像差，而折射表面相对于倾斜入射的光线提供昏迷。

48. 发明申请

US20050073937A1 Objective lens 失效
标题翻译：物镜
公开(公告)号：US20050073937A1
公开(公告)日：2005-04-07
申请号：US10956132
申请日：2004-10-04
申请人： Daisuke Koreeda , Koichi Maruyama , Shuichi Takeuchi
发明人： Daisuke Koreeda , Koichi Maruyama , Shuichi Takeuchi
IPC分类号： G11B7/00 , G11B7/135
CPC分类号： G11B7/1392 , G11B7/1353 , G11B7/1374 , G11B2007/0006
摘要： An objective lens used for recording data to and/or reproducing data from a plurality of types of optical discs having different thicknesses of cover layers. The objective lens satisfies a condition 0.02
摘要翻译：用于从具有不同厚度的覆盖层的多种类型的光盘记录数据和/或再现数据的物镜。物镜满足条件0.02

49. 发明申请

US20050002118A1 Objective lens for optical pick-up 失效
标题翻译：物镜用于光学拾取
公开(公告)号：US20050002118A1
公开(公告)日：2005-01-06
申请号：US10867781
申请日：2004-06-16
申请人： Koichi Maruyama , Daisuke Koreeda
发明人： Koichi Maruyama , Daisuke Koreeda
IPC分类号： G02B13/14 , G02B27/00 , G11B7/00 , G11B7/135 , G02B3/02 , G02B13/18
CPC分类号： G11B7/1374 , G02B5/188 , G02B5/1895 , G02B13/146 , G02B27/0037 , G02B27/4238 , G11B7/1353 , G11B2007/0006
摘要： An objective lens that satisfies conditions: −0.02
摘要翻译：满足条件的物镜：-0.02

50. 发明授权

US06807018B2 Objective lens for optical pick-up 失效
标题翻译：物镜用于光学拾取
公开(公告)号：US06807018B2
公开(公告)日：2004-10-19
申请号：US10402932
申请日：2003-04-01
申请人： Koichi Maruyama , Takashi Yamanouchi
发明人： Koichi Maruyama , Takashi Yamanouchi
IPC分类号： G02B302
CPC分类号： G02B27/0037 , G11B7/1275 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： An objective lens of an optical pick-up is formed to provide axial astigmatism corresponding to wavefront aberration of 0.01&lgr; [rms] or more when a shorter wavelength laser beam emitted by a first laser diode is converged on a first optical disc, and to provide coma so that its sign when the shorter wavelength laser beam is converged on the first optical disc will be opposite to its sign when a longer wavelength laser beam emitted by a second laser diode is converged on a second optical disc.
摘要翻译：当由第一激光二极管发射的较短波长的激光束会聚在第一光盘上时，形成光学拾波器的物镜，以提供对应于0.01λ[rms]或更大的波前像差的轴向像散，并提供使得当较短波长的激光束会聚在第一光盘上时的符号将与其第二激光二极管发射的较长波长的激光束会聚在第二光盘上时的符号相反。

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