公开(公告)号：US20090022037A1

公开(公告)日：2009-01-22

申请号：US12147564

申请日：2008-06-27

申请人： Tohru Hotta ,  Ryoichi Kawasaki

发明人： Tohru Hotta ,  Ryoichi Kawasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1356 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/127 ,  G11B7/1362 ,  G11B7/1374 ,  G11B7/139 ,  G11B2007/0006

摘要： An optical pickup apparatus comprising: a first objective lens; and a second objective lens arranged with the first objective lens in a radial direction of an optical disc, the first objective lens being configured to focus laser light for reproduction, which is laser light for reproducing a signal recorded in a signal recording layer of the optical disc, onto the signal recording layer, the second objective lens being configured to focus laser light for recording, which is laser light for recording a signal, onto the signal recording layer.

摘要翻译： 一种光学拾取装置，包括：第一物镜; 以及与所述第一物镜配置在光盘的径向方向上的第二物镜，所述第一物镜被配置为聚焦用于再现的激光，所述激光用于再现记录在所述光学信号记录层中的信号 光盘到信号记录层上，第二物镜被配置为将用于记录信号的激光用于记录的激光聚焦到信号记录层上。

公开(公告)号：US08385180B2

公开(公告)日：2013-02-26

申请号：US12404824

申请日：2009-03-16

申请人： Tohru Hotta ,  Ryoichi Kawasaki

发明人： Tohru Hotta ,  Ryoichi Kawasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/13927 ,  G11B7/1353 ,  G11B7/1376

摘要： An optical pickup apparatus comprising: a laser diode; an objective lens made of a synthetic resin configured to focus laser light emitted from the laser diode to a signal recording layer of an optical disc; and a collimating lens having a diffraction grating and arranged in an optical path between the laser diode and the objective lens, the collimating lens being so moved in an optical axis direction of the laser light as to correct spherical aberration occurring in response to a change in temperature when performing a recording operation for the optical disc, and the collimating lens correcting by the diffraction grating chromatic aberration occurring when switching from the recording operation to a reproducing operation for the optical disc.

摘要翻译： 一种光学拾取装置，包括：激光二极管; 由合成树脂制成的物镜，被配置为将从激光二极管发出的激光聚焦到光盘的信号记录层; 以及具有衍射光栅并配置在激光二极管和物镜之间的光路中的准直透镜，准直透镜沿激光的光轴方向移动，以校正响应于变化而发生的球面像差 以及通过当从记录操作切换到光盘的再现操作时发生的衍射光栅色差校正的准直透镜。

公开(公告)号：US08369193B2

公开(公告)日：2013-02-05

申请号：US12859123

申请日：2010-08-18

申请人： Ryoichi Kawasaki ,  Tohru Hotta

发明人： Ryoichi Kawasaki ,  Tohru Hotta

IPC分类号： G11B7/00

CPC分类号： G11B7/22 ,  G11B7/1374 ,  G11B7/13925 ,  G11B2007/0006 ,  Y10T29/49826

摘要： An optical-pickup apparatus includes: a first-objective lens; a second-objective lens; a lens holder including a first-lens barrel having the first-objective lens mounted on an end face thereof and a second-lens barrel having the second-objective lens mounted on an end face thereof; an actuator unit having the lens holder mounted thereon; and a housing having the actuator unit mounted thereon, the first and second objective lenses each being mounted on the lens holder such that a direction, in which wavefront of coma aberration on each lens face is most advanced in phase, is aligned with a radial direction of an information-recording medium, the actuator unit being mounted on the housing such that an optical axis of the first-objective lens is inclined in the radial direction at an inclination angle of the axis toward a recording surface of the medium required to cancel coma aberration of the first-objective lens to the surface.

摘要翻译： 一种光拾取装置，包括：第一物镜; 第二物镜; 透镜保持器，其包括具有安装在其端面上的第一物镜的第一透镜镜筒和安装在其端面上的具有第二物镜的第二透镜镜筒; 具有安装在其上的透镜保持器的致动器单元; 以及具有安装在其上的致动器单元的壳体，所述第一和第二物镜各自安装在所述透镜保持器上，使得每个透镜面上的彗差的波前相位最前进的方向与径向对齐 所述致动器单元安装在所述壳体上，使得所述第一物镜的光轴在径向方向上以朝向所述介质的记录表面的倾斜角倾斜以消除昏迷所需的介质 第一物镜对表面的像差。

公开(公告)号：US08363526B2

公开(公告)日：2013-01-29

申请号：US12915643

申请日：2010-10-29

申请人： Tohru Hotta ,  Ryoichi Kawasaki

发明人： Tohru Hotta ,  Ryoichi Kawasaki

IPC分类号： G11B7/125

CPC分类号： G11B7/13925 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup apparatus, which reads signals recorded on first and second signal recording layers of an optical disc, includes: a laser diode; an objective lens to condense a laser beam to the first and second signal recording layers; and a collimating lens disposed in a light path of the laser beam between the laser diode and the objective lens and configured to correct a spherical aberration by moving in a light axis direction of the laser beam, and the objective lens includes a bifocal lens and is configured such that a second focal point does not coincide in position with the second signal recording layer when a first focal point coincides in position with the first signal recording layer, and the first focal point does not coincide in position with the first signal recording layer when the second focal point coincides in position with the second signal recording layer.

摘要翻译： 读取记录在光盘的第一和第二信号记录层上的信号的光学拾取装置包括：激光二极管; 用于将激光束冷凝到第一和第二信号记录层的物镜; 以及准直透镜，其配置在激光二极管与物镜之间的光路的光路上，并配置为通过沿着激光的光轴方向移动来校正球面像差，并且物镜包括双焦点透镜，并且是 被构造成使得当第一焦点与第一信号记录层重合时，第二焦点不与第二信号记录层重合，并且第一焦点与第一信号记录层的位置不重合， 第二焦点与第二信号记录层重合。

公开(公告)号：US08154978B2

公开(公告)日：2012-04-10

申请号：US12040518

申请日：2008-02-29

申请人： Tohru Hotta ,  Ryoichi Kawasaki ,  Kenji Kan ,  Hiroyuki Shindo

发明人： Tohru Hotta ,  Ryoichi Kawasaki ,  Kenji Kan ,  Hiroyuki Shindo

IPC分类号： G11B7/00 ,  G02B1/10

CPC分类号： G11B7/1374 ,  G11B7/139

摘要： An optical pickup apparatus comprising: an objective lens configured to focus laser light having the Gaussian distribution properties emitted from a laser diode to a signal recording layer of an optical disc; and an adjustment coating formed on a surface of an incident face of the objective lens on which the laser light is to be made incident, the adjustment coating being configured to adjust transmittance of the laser light passing through the objective lens, the adjustment coating being formed on the surface of the incident face such that the transmittance is lowered as a numerical aperture of the objective lens is reduced.

摘要翻译： 一种光学拾取装置，包括：物镜，被配置为将具有从激光二极管发射的高斯分布特性的激光聚焦到光盘的信号记录层; 以及形成在要使激光入射的物镜的入射面的表面上的调整涂层，调整涂层被配置为调节通过物镜的激光的透射率，形成调整涂层 在入射面的表面上，由于物镜的数值孔径减小，透射率降低。

公开(公告)号：US08081553B2

公开(公告)日：2011-12-20

申请号：US12324248

申请日：2008-11-26

申请人： Tohru Hotta ,  Ryoichi Kawasaki

发明人： Tohru Hotta ,  Ryoichi Kawasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1378 ,  G11B7/1275 ,  G11B7/1369 ,  G11B7/13925 ,  G11B2007/0006

摘要： An optical pickup apparatus comprising: a laser diode emitting laser light having a first wavelength; an objective lens focusing the laser light having the first wavelength emitted from the laser diode to each signal recording layer of a first optical disc for which the laser light having the first wavelength is specified as laser light for reproducing a signal and a second optical disc for which laser light having a second wavelength different from the first wavelength is specified as laser light for reproducing a signal; and a spherical aberration correction element disposed in an optical path between the laser diode and the objective lens, the spherical aberration correction element correcting each spherical aberration of the first optical disc and the second optical disc to reproduce a signal recorded in each signal recording layer of the first optical disc and the second optical disc.

摘要翻译： 一种光学拾取装置，包括：发射具有第一波长的激光的激光二极管; 将具有从激光二极管发射的第一波长的激光的物镜聚焦到具有第一波长的激光的第一光盘的每个信号记录层被指定为用于再现信号的激光，以及第二光盘 具有不同于第一波长的第二波长的激光被指定为用于再现信号的激光; 以及球面像差校正元件，设置在激光二极管和物镜之间的光路中，所述球面像差校正元件校正第一光盘和第二光盘的每个球面像差，以再现记录在每个信号记录层中的信号 第一光盘和第二光盘。

公开(公告)号：US07957234B2

公开(公告)日：2011-06-07

申请号：US12390086

申请日：2009-02-20

申请人： Tohru Hotta ,  Ryoichi Kawasaki

发明人： Tohru Hotta ,  Ryoichi Kawasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/13927 ,  G11B2007/0006

摘要： An optical pickup apparatus comprising: a laser diode; an objective lens configured to focus laser light emitted from the laser diode on a signal recording layer of an optical disc; a first aberration correction element arranged in an optical path between the laser diode and the objective lens; and a second aberration correction element arranged in the optical path between the laser diode and the objective lens and having an aberration correction speed lower than the aberration correction speed of the first aberration correction element, the first aberration correction element and the second aberration correction element being selectively operated according to the required aberration correction speed.

摘要翻译： 一种光学拾取装置，包括：激光二极管; 配置为将从激光二极管发射的激光聚焦在光盘的信号记录层上的物镜; 布置在激光二极管和物镜之间的光路中的第一像差校正元件; 以及第二像差校正元件，其布置在激光二极管和物镜之间的光路中，并且具有比第一像差校正元件的像差校正速度低的像差校正速度，第一像差校正元件和第二像差校正元件为 根据所需的像差校正速度选择性地操作。

公开(公告)号：US20090290475A1

公开(公告)日：2009-11-26

申请号：US12371109

申请日：2009-02-13

申请人： Tohru Hotta ,  Ryoichi Kawasaki ,  Tetsuo Hosokawa

发明人： Tohru Hotta ,  Ryoichi Kawasaki ,  Tetsuo Hosokawa

IPC分类号： G11B7/135

CPC分类号： G11B7/22 ,  G11B2007/0006

摘要： An optical pickup apparatus comprising: a diffraction grating configured to diffract laser light from a laser diode so that signals recorded in first and second optical discs are selectively reproduced, thicknesses of protective layers between surfaces and signal recording surfaces of the first and second optical discs being different from each other; a polarization beam splitter configured to divide laser light from the diffraction grating into first and second laser lights whose light amounts are substantially the same; a first objective lens configured to focus the first laser light onto the signal recording surface of the first optical disc; a second objective lens configured to focus the second laser light onto the signal recording surface of the second optical disc; and a photodetector configured to be applied with return lights of the first and second laser lights reflected from the signal recording surfaces of the first and second optical discs.

摘要翻译： 一种光学拾取装置，包括：衍射光栅，被配置为衍射来自激光二极管的激光，使得记录在第一和第二光盘中的信号被选择性地再现，第一和第二光盘的表面和信号记录表面之间的保护层的厚度为 彼此不同; 偏振分束器，被配置为将来自衍射光栅的激光分成光量基本相同的第一和第二激光; 配置成将所述第一激光聚焦到所述第一光盘的信号记录表面上的第一物镜; 配置为将所述第二激光聚焦到所述第二光盘的信号记录表面上的第二物镜; 以及光电检测器，被配置为施加从第一和第二光盘的信号记录表面反射的第一和第二激光的返回光。

公开(公告)号：US20090245073A1

公开(公告)日：2009-10-01

申请号：US12413151

申请日：2009-03-27

申请人： Tohru Hotta ,  Ryoichi Kawasaki

发明人： Tohru Hotta ,  Ryoichi Kawasaki

IPC分类号： G11B7/135

CPC分类号： G11B7/1376 ,  G11B7/13927

摘要： An optical-pickup apparatus comprising: a laser diode; an objective lens made of a synthetic resin to focus laser light emitted from the laser diode onto a signal-recording layer of an optical disc; a collimating lens that is arranged in an optical path between the laser diode and the objective lens, and is so movable in an optical axis direction of the laser light as to correct spherical aberration; a temperature sensor to detect a temperature of the objective lens; and an aberration-correcting device to move the collimating lens from a first position where the spherical aberration is a predetermined value on a positive side to a second position where the spherical aberration is a predetermined value on a negative side, when an amount of change in temperature detected by the temperature sensor reaches a predetermined amount after an operation of reproducing a signal from the signal-recording layer is started.

摘要翻译： 一种光拾取装置，包括：激光二极管; 由合成树脂制成的物镜，将从激光二极管发出的激光聚焦到光盘的信号记录层上; 准直透镜，被布置在激光二极管和物镜之间的光路中，并且能够在激光的光轴方向上移动以校正球面像差; 用于检测物镜的温度的温度传感器; 以及像差校正装置，用于将准直透镜从正侧的球​​面像差为预定值的第一位置移动到负侧的球面像差为预定值的第二位置，当变化量 在开始从信号记录层重放信号的操作之后，由温度传感器检测到的温度达到预定量。

公开(公告)号：US08264939B2

公开(公告)日：2012-09-11

申请号：US12945636

申请日：2010-11-12

申请人： Tohru Hotta ,  Ryoichi Kawasaki

发明人： Tohru Hotta ,  Ryoichi Kawasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1392 ,  G11B7/1374

摘要： An optical pickup apparatus includes: a laser diode configured to emit a laser beam; and an objective lens configured to condense the laser beam into a laser spot through which a signal recorded on a signal recording layer of an optical disc is read out by the laser beam, the objective lens having formed thereon a lens surface with a second numerical aperture for acting as a lens, which is larger than a first numerical aperture for forming the laser spot.

摘要翻译： 一种光学拾取装置，包括：激光二极管，被配置为发射激光束; 以及物镜，被配置为将激光束冷凝成激光光斑，通过激光束读出记录在光盘的信号记录层上的信号，物镜在其上形成有具有第二数值孔径的透镜表面 用作用作形成激光光斑的第一数值孔径的透镜。