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41. 发明授权

US07850319B2 Light-absorbing member 有权
标题翻译：光吸收部件
公开(公告)号：US07850319B2
公开(公告)日：2010-12-14
申请号：US11597651
申请日：2005-05-16
申请人： Motonobu Yoshikawa , Yoshiharu Yamamoto , Michihiro Yamagata , Yasuhiro Tanaka
发明人： Motonobu Yoshikawa , Yoshiharu Yamamoto , Michihiro Yamagata , Yasuhiro Tanaka
IPC分类号： G02B27/00
CPC分类号： G02B1/118 , G02B1/11 , G02B5/003 , G02B7/02
摘要： A light-absorbing member has a substrate (101, 111) made of a material capable of absorbing light of which reflection is to be prevented, and an antireflection structure (102, 112, 303) having structural elements arranged on the surface of the curve in an array form at a period smaller than the wavelength of the light. The substrate having the shape of a curve viewed from a macroscopic viewpoint. The structural elements have a shape protruding or being recessed from a reference face corresponding to the curve of the substrate, and are arranged so that the straight lines connecting the reference face to the tips of the respective structural elements are nearly parallel to one another.
摘要翻译：光吸收构件具有由能够吸收要防止反射的光的材料制成的基板（101,111）和具有布置在曲线表面上的结构元件的抗反射结构（102,112,303）以小于光的波长的周期的阵列形式。从宏观角度看，具有曲线形状的基板。结构元件具有从与基板的曲线对应的参考面突出或凹入的形状，并且被布置成使得连接参考面的直线与各个结构元件的顶端几乎平行。

42. 发明授权

US07548383B2 Optical pickup and objective lens used therein 有权
标题翻译：其中使用的光学拾取和物镜
公开(公告)号：US07548383B2
公开(公告)日：2009-06-16
申请号：US11808930
申请日：2007-06-13
申请人： Katsuhiko Hayashi , Yasuhiro Tanaka , Michihiro Yamagata , Kazuhiko Ishimaru
发明人： Katsuhiko Hayashi , Yasuhiro Tanaka , Michihiro Yamagata , Kazuhiko Ishimaru
IPC分类号： G02B3/02 , G11B7/135
CPC分类号： G11B7/1376 , G11B7/13925 , G11B2007/0013
摘要： An optical pickup 1 includes a collimator lens 13 for changing the shape of a laser light by moving on the optical axis AX from a base point. An objective lens 15 is set so as to form a spot of which size, when the collimator lens 13 is located at the base point, is minimum at a point apart from the light source side surface of an information recording medium 20 by a distance of Lc defined by an expression (1): Lc=(L0+Ln)/2 (1), wherein Lc is named as a thickness to the designed center; L0 is a distance between the light source side surface of the information recoding medium and an information recording face located nearest to the light source side surface; and Ln is a distance between the light source side surface of the information recording medium and an information recording face located farthest from the light source side surface.
摘要翻译：光拾取器1包括准直透镜13，用于通过从基点在光轴AX上移动来改变激光的形状。物镜15被设定为当准直透镜13位于基点时形成大小的点，在与信息记录介质20的光源侧表面分开的距离处最小 Lc =（L0 + Ln）/ 2（1），<？in-line-formula description =“In-line-formula” 公式描述=“在线公式”end =“tail”？>其中Lc被命名为设计中心的厚度; L0是信息记录介质的光源侧表面与最靠近光源侧表面的信息记录面之间的距离; Ln是信息记录介质的光源侧表面与距光源侧表面最远的信息记录面之间的距离。

43. 发明申请

US20090022039A1 Optical Pickup and Objective Optical System for Use in the Same 失效
标题翻译：光拾取和目标光学系统在同一使用
公开(公告)号：US20090022039A1
公开(公告)日：2009-01-22
申请号：US11631953
申请日：2006-02-17
申请人： Katsuhiko Hayashi , Akihiro Arai , Yasuhiro Tanaka , Michihiro Yamagata
发明人： Katsuhiko Hayashi , Akihiro Arai , Yasuhiro Tanaka , Michihiro Yamagata
IPC分类号： G11B7/00
CPC分类号： G11B7/1275 , G02B3/04 , G02B3/08 , G02B27/144 , G02B27/145 , G11B7/1353 , G11B7/1369 , G11B7/1378 , G11B7/13922 , G11B7/13925 , G11B2007/0006
摘要： An optical pickup (1) includes a light source (6) capable of emitting laser beams of various wavelengths and an objective optical system (2). The objective optical system (2) includes at least two wavefront conversion surfaces (13a) and (16a) and an objective lens (10). The at least two wavefront conversion surfaces (13a) and (16a) convert a wavefront of any laser beam entered therein into a different wavefront in response to the kind of an optical information recording medium (3) corresponding to the laser light. The objective lens (10) focuses the laser beam came out of the wavefront conversion surface (16a) on an optical information recording surface (3R). The optical pickup (1) satisfies the following condition for every wavelength of the corresponding laser beams: |SCMAX|
摘要翻译：光拾取器（1）包括能够发射各种波长的激光束的光源（6）和物镜光学系统（2）。物镜光学系统（2）包括至少两个波前转换表面（13a）和（16a）和物镜（10）。响应于对应于激光的光学信息记录介质（3）的种类，至少两个波前转换表面（13a）和（16a）将其中输入的任何激光束的波前转换成不同的波阵面。物镜（10）将激光束聚焦在光学信息记录表面（3R）上的波前转换表面（16a）之外。对于相应激光束的每个波长，光学拾取器（1）满足以下条件：<？in-line-formula description =“In-line Formulas”end =“lead”？> | SCMAX | <0.036（1）？in-line-formula description =“In-line Formulas”end =“tail”？>其中SCMAX是针对物镜光学系统（2）的正弦条件的违规的最大值。

44. 发明申请

US20080130467A1 Objective optical system and optical pickup including the same 审中-公开
标题翻译：物镜光学系统和包括其的光学拾取器
公开(公告)号：US20080130467A1
公开(公告)日：2008-06-05
申请号：US11819204
申请日：2007-06-26
申请人： Michihiro Yamagata , Yoshiaki Komma , Yasuhiro Tanaka , Katsuhiko Hayashi
发明人： Michihiro Yamagata , Yoshiaki Komma , Yasuhiro Tanaka , Katsuhiko Hayashi
IPC分类号： G11B7/00
CPC分类号： G11B7/1374 , G11B7/1275 , G11B7/1353 , G11B2007/0006 , G11B2007/13722
摘要： An objective optical system 10 includes a diffraction plane 15 for separating a laser light beam into at least 0th-order diffracted light and 1st-order diffracted light. The objective optical system 10 is configured to focus the 0th-order diffracted light onto an information recording surface 22a of a first information recording medium 20a and the 1st-order diffracted light onto an information recording surface 22b of a second information recording medium 20b and meet the following conditional expression (1): η0>η1 (1) wherein η0 is the diffraction efficiency of the 0th-order diffracted light and η1 is the diffraction efficiency of the 1st-order diffracted light.
摘要翻译：物镜光学系统10包括用于将激光束分离成至少0级次级衍射光和1级次级衍射光的衍射平面15。物镜光学系统10被配置为将第0个/次级衍射光聚焦到第一信息记录介质20a的信息记录表面22a上，并且第一信号记录介质将衍射光分级到第二信息记录介质20b的信息记录表面22b上，并满足以下条件表达式（1）：<？in-line-formula description =“In-line Formulas”end =“lead”？> η（1）<βin-line-formula description =“In-line Formulas”end =“tail”？>其中eta <0> 是第0级衍射光的衍射效率，而第1级衍射光的衍射效率是第1级次衍射光的衍射效率衍射光。

45. 发明申请

US20080080357A1 Objective lens element with peripheral diffraction structure and central phase step structure for optical disks and optical head device incorporating the same 审中-公开
$Objective lens element with peripheral diffraction structure and central phase step structure for optical disks and optical head device incorporating the same$
标题翻译：具有外围衍射结构的物镜元件和用于光盘的中心相阶梯结构以及包含该物镜的光学头装置
公开(公告)号：US20080080357A1
公开(公告)日：2008-04-03
申请号：US11984722
申请日：2007-11-21
申请人： Yasuhiro Tanaka , Michihiro Yamagata , Akifumi Hashimoto , Yuichi Takahashi , Yukihiro Chokyu , Kei Ikeda
发明人： Yasuhiro Tanaka , Michihiro Yamagata , Akifumi Hashimoto , Yuichi Takahashi , Yukihiro Chokyu , Kei Ikeda
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/1367 , G11B7/1374 , G11B7/139 , G11B7/13922 , G11B2007/0006
摘要： An objective lens records information on, or read information from, a first optical medium by utilizing a first light beam which convergences on the first optical medium at a first numerical aperture (hereinafter “NA1”). The objective lens records information on, or read information from, a second optical medium by utilizing a second light beam which convergences on the second optical medium at a second numerical aperture (hereinafter “NA2”). In the objective lens, NA1 is greater than NA2. The objective lens has an optical lens for receiving the first light beam and the second light beam. The optical lens has a peripheral diffraction structure disposed substantially outside an area of incidence of the second light beam for suppressing fluctuation in wavefront aberration of the first light beam, and a phase step structure disposed in a central region relative to the peripheral region for producing a phase difference in the second light beam.
摘要翻译：物镜通过利用以第一数值孔径收敛在第一光学介质上的第一光束（以下称为“NA1”）来记录关于第一光学介质的信息或从第一光学介质读取信息。物镜通过利用以第二数值孔径（以下称为“NA2”）会聚在第二光学介质上的第二光束来记录关于第二光学介质的信息或从第二光学介质读取信息。在物镜中，NA1大于NA2。物镜具有用于接收第一光束和第二光束的光学透镜。光学透镜具有基本上设置在第二光束的入射面的外侧的外围衍射结构，用于抑制第一光束的波面像差的波动，以及相位阶梯结构，其设置在相对于周边区域的中心区域中，第二光束的相位差。

46. 发明申请

US20070258148A1 Light quantity distribution control element and optical apparatus using the same 有权
标题翻译：光量分配控制元件和使用其的光学装置
公开(公告)号：US20070258148A1
公开(公告)日：2007-11-08
申请号：US11812414
申请日：2007-06-19
申请人： Motonobu Yoshikawa , Yoshiharu Yamamoto , Yasuhiro Tanaka , Michihiro Yamagata , Hiroshi Yamaguchi
发明人： Motonobu Yoshikawa , Yoshiharu Yamamoto , Yasuhiro Tanaka , Michihiro Yamagata , Hiroshi Yamaguchi
IPC分类号： G02B27/00
CPC分类号： G02B1/118 , G02B7/02 , Y10S359/90
摘要： A light quantity distribution control element includes a substrate of 20 mm×20 mm×3 mm made of a material that transmits light, such as optical glass or acryl, and a antireflective structure provided on a surface of the substrate. As the antireflective structure, a conical antireflective structure of a pitch of 0.15 μm (periodic structure having conical convexities) is formed. This corresponds to a antireflective structure having a pitch of a wavelength or less in the ultraviolet band (150 nm to 400 nm) at the time when ultraviolet light is used as incident light.
摘要翻译：光量分布控制元件包括由透光材料（例如光学玻璃或丙烯酸）制成的20mm×20mm×3mm的基板和设置在基板的表面上的抗反射结构。作为抗反射结构，形成0.15μm的间距的锥形抗反射结构（具有圆锥形凸起的周期性结构）。这对应于当使用紫外光作为入射光时，在紫外线带（150nm至400nm）中具有波长或更小的间距的抗反射结构。

47. 发明授权

US07221521B2 Optical pickup lens device and information recording and reproducing device using the same 有权
公开(公告)号：US07221521B2
公开(公告)日：2007-05-22
申请号：US11385829
申请日：2006-03-22
申请人： Katsuhiko Hayashi , Yasuhiro Tanaka , Michihiro Yamagata , Yoshiaki Komma , Fumitomo Yamasaki
发明人： Katsuhiko Hayashi , Yasuhiro Tanaka , Michihiro Yamagata , Yoshiaki Komma , Fumitomo Yamasaki
IPC分类号： G02B13/18 , G02B3/02 , G11B7/00 , G11B7/135
CPC分类号： G11B7/13925 , G11B7/1353 , G11B7/1367 , G11B7/1376
摘要： An optical pickup lens device includes, in the order from the light source side, a collimating lens for converting a bundle of rays into parallel rays or predetermined convergent or divergent rays, the collimating lens being movably held along a direction of an optical axis of a bundle of rays emitted from a light source; an aberration correcting element for allowing a bundle of rays emitted from the collimating lens to be transmitted therethrough; and an objective lens element having a numerical aperture of 0.8 or more, and converging a bundle of rays coming from the aberration correcting element onto the information recording medium to form a spot. The aberration correcting element and the objective lens element are integrally held together in a direction orthogonal to the optical axis so as to perform tracking on the information recording medium, and satisfy predetermined conditions.

48. 发明申请

US20060164734A1 Optical pickup lens device and information recording and reproducing device using the same 有权
公开(公告)号：US20060164734A1
公开(公告)日：2006-07-27
申请号：US11385765
申请日：2006-03-22
申请人： Katsuhiko Hayashi , Yasuhiro Tanaka , Michihiro Yamagata , Yoshiaki Komma
发明人： Katsuhiko Hayashi , Yasuhiro Tanaka , Michihiro Yamagata , Yoshiaki Komma
IPC分类号： G02B9/00
CPC分类号： G11B7/13925 , G11B7/1353 , G11B7/1367 , G11B7/1376
摘要： An optical pickup lens device includes, in the order from the light source side, collimating means for converting a bundle of rays into parallel rays or predetermined convergent or divergent rays, the collimating means being movably held along a direction of an optical axis of a bundle of rays emitted from a light source; an aberration correcting element for allowing a bundle of rays emitted from the collimating means to be transmitted therethrough; and an objective lens element having a numerical aperture of 0.8 or more, and converging a bundle of rays coming from the aberration correcting element onto the information recording medium to form a spot. The aberration correcting element and the objective lens element are integrally held together in a direction orthogonal to the optical axis so as to perform tracking on the information recording medium, and satisfy predetermined conditions.

49. 发明授权

US5684641A Objective lens and optical head apparatus using the objective lens 失效
标题翻译：物镜和使用物镜的光学头装置
公开(公告)号：US5684641A
公开(公告)日：1997-11-04
申请号：US570639
申请日：1995-12-11
申请人： Yasuhiro Tanaka , Osamu Doi , Kenji Inoue , Jun Murata , Michihiro Yamagata
发明人： Yasuhiro Tanaka , Osamu Doi , Kenji Inoue , Jun Murata , Michihiro Yamagata
IPC分类号： G02B13/00 , G02B3/06 , G02B13/08 , G11B7/125 , G11B7/135 , G02B3/02 , G11B7/00
CPC分类号： G02B3/06 , G11B7/1374 , G11B7/1398
摘要： In an objective lens for an optical head apparatus for reading or writing an information on a recording medium such as optical disc, astigmatism is added on axial wavefront aberration so that off-axis astigmatism is to be cancelled by the axial astigmatism. At least one surface of the objective lens is a toric or cylindrical surface, and a standard deviation of astigmatism component of axial wavefront aberration is defined as Wa is to be restricted in a range of 0
摘要翻译：在用于在诸如光盘之类的记录介质上读取或写入信息的光学头装置的物镜中，在轴向波前像差上增加像散，使得通过轴向像散消除离轴散光。物镜的至少一个表面是复曲面或圆柱形表面，并且将轴向波面像差的像散分量的标准偏差定义为在0

50. 发明授权

US5535058A Focus error detecting element and optical head using the same 失效
标题翻译：聚焦误差检测元件和光头使用它
公开(公告)号：US5535058A
公开(公告)日：1996-07-09
申请号：US109532
申请日：1993-08-20
申请人： Yasuhiro Tanaka , Michihiro Yamagata
发明人： Yasuhiro Tanaka , Michihiro Yamagata
IPC分类号： G02B3/06 , G02B13/00 , G02B13/18 , G11B7/09 , G11B7/135
CPC分类号： G02B3/06 , G11B7/0909 , G11B7/1378
摘要： An optical system for detecting a focus error signal in an optical disc according to the astigmatic method is constituted by a single lens element. This lens element has a first lens surface defined by a toric surface effective to converge the incident rays of light and also to produce an astigmatism. This lens element also has a second lens surface which has a negative power so as to form a telephoto optical system, making it possible to shorten the length of the optical system.
摘要翻译：用于根据像散法检测光盘中的聚焦误差信号的光学系统由单个透镜元件构成。该透镜元件具有由复曲面表面限定的第一透镜表面，其有效地会聚入射光线并且还产生像散。该透镜元件还具有第二透镜表面，该第二透镜表面具有负的功率以形成远摄光学系统，使得可以缩短光学系统的长度。

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