公开(公告)号：US08165003B2

公开(公告)日：2012-04-24

申请号：US11442496

申请日：2006-05-25

申请人： Tohru Hotta ,  Ryouichi Kawasaki ,  Shigeru Nakamura

发明人： Tohru Hotta ,  Ryouichi Kawasaki ,  Shigeru Nakamura

IPC分类号： G11B7/135

CPC分类号： G11B7/1365 ,  G11B7/1263 ,  G11B7/1275 ,  G11B7/1356 ,  G11B7/1395 ,  G11B2007/0006

摘要： A first laser source is arranged on a transmitting side of a polarizing beam splitter, while a second laser source is arranged on a reflecting side of the polarizing beam splitter. The splitting surface of the polarizing beam splitter has a film characteristic of substantially transmitting s-polarization component of the laser light having the first wavelength emitted by the first laser source and substantially reflecting s-polarization component of the laser light having the second wavelength emitted by the second laser source. A plate-like beam splitter serves to introduce laser light reflected off of a signal recording medium into an optical detector by directing the laser light away from the optical path in which the laser sources are located. The plate-like beam splitter includes a splitting surface which has a reflectance that is higher than its transmittance.

摘要翻译： 第一激光源设置在偏振分束器的发射侧，而第二激光源设置在偏振分束器的反射侧。 偏振分束器的分离表面具有基本上透射由第一激光源发出的具有第一波长的激光的s偏振分量并基本上反射出具有第二波长的激光的s偏振分量的膜特性， 第二激光源。 板状分束器用于将激光从激光源所在的光路引导出来，将从信号记录介质反射的激光引入光学检测器。 板状分束器包括具有高于其透射率的反射率的分离表面。

公开(公告)号：US07554751B2

公开(公告)日：2009-06-30

申请号：US11481598

申请日：2006-07-06

申请人： Tohru Hotta ,  Ryouichi Kawasaki

发明人： Tohru Hotta ,  Ryouichi Kawasaki

IPC分类号： G02B13/00

CPC分类号： G02B27/0025 ,  G02B3/00 ,  G11B7/1374 ,  G11B7/22

摘要： A lens is provided with a reflective annular zone face that is approximately perpendicular to the lens optical axis, and tilt of the reflective annular zone face is set to be equivalent to coma aberration resulting from the lens.

摘要翻译： 透镜设置有大致垂直于透镜光轴的反射环形区域面，并且反射环形区域面的倾斜度被设置为等于由透镜产生的彗形像差。

公开(公告)号：US20060280065A1

公开(公告)日：2006-12-14

申请号：US11442496

申请日：2006-05-25

申请人： Tohru Hotta ,  Ryouichi Kawasaki ,  Shigeru Nakamura

发明人： Tohru Hotta ,  Ryouichi Kawasaki ,  Shigeru Nakamura

IPC分类号： G11B7/00

CPC分类号： G11B7/1365 ,  G11B7/1263 ,  G11B7/1275 ,  G11B7/1356 ,  G11B7/1395 ,  G11B2007/0006

摘要： A first laser source is arranged on a transmitting side of a polarizing beam splitter, while a second laser source is arranged on a reflecting side of the polarizing beam splitter. The splitting surface of the polarizing beam splitter has a film characteristic of substantially transmitting s-polarization component of the laser light having the first wavelength emitted by the first laser source and substantially reflecting s-polarization component of the laser light having the second wavelength emitted by the second laser source. A plate-like beam splitter serves to introduce laser light reflected off of a signal recording medium into an optical detector by directing the laser light away from the optical path in which the laser sources are located. The plate-like beam splitter includes a splitting surface which has a reflectance that is higher than its transmittance.

摘要翻译： 第一激光源设置在偏振分束器的发射侧，而第二激光源设置在偏振分束器的反射侧。 偏振分束器的分离表面具有基本上透射由第一激光源发出的具有第一波长的激光的s偏振分量并基本上反射出具有第二波长的激光的s偏振分量的膜特性， 第二激光源。 板状分束器用于将激光从激光源所在的光路引导出来，将从信号记录介质反射的激光引入光学检测器。 板状分束器包括具有高于其透射率的反射率的分离表面。

公开(公告)号：US20090022032A1

公开(公告)日：2009-01-22

申请号：US11549921

申请日：2006-10-16

申请人： Ryouichi Kawasaki ,  Yoshitaka Hotta

发明人： Ryouichi Kawasaki ,  Yoshitaka Hotta

IPC分类号： G11B7/00

CPC分类号： G11B7/0903 ,  G11B7/00718 ,  G11B7/1353 ,  G11B2007/0006

摘要： An optical pickup unit comprises a diffraction grating that divides light into at least three luminous fluxes and condenses the three luminous fluxes to apply at least three focusing spots, independent of each other, onto a signal side of a medium. The diffraction grating is divided into at least four regions, a first region, a second region, a third region, and a fourth region.

摘要翻译： 光学拾取单元包括衍射光栅，该衍射光栅将光分成至少三个光束并且冷凝三个光束以将至少三个聚焦点彼此独立地施加到介质的信号侧。 衍射光栅被分为至少四个区域，第一区域，第二区域，第三区域和第四区域。

公开(公告)号：US20070008630A1

公开(公告)日：2007-01-11

申请号：US11481598

申请日：2006-07-06

申请人： Tohru Hotta ,  Ryouichi Kawasaki

发明人： Tohru Hotta ,  Ryouichi Kawasaki

IPC分类号： G02B7/02

CPC分类号： G02B27/0025 ,  G02B3/00 ,  G11B7/1374 ,  G11B7/22

摘要： A lens is provided with a reflective annular zone face that is approximately perpendicular to the lens optical axis, and tilt of the reflective annular zone face is set to be equivalent to coma aberration resulting from the lens.

摘要翻译： 透镜设置有大致垂直于透镜光轴的反射环形区域面，并且反射环形区域面的倾斜度被设定为等于由透镜产生的彗形像差。