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：US08087037B2

公开(公告)日：2011-12-27

申请号：US13036739

申请日：2011-02-28

申请人： Ryoichi Kawasaki ,  Hiroyuki Shindo

发明人： Ryoichi Kawasaki ,  Hiroyuki Shindo

IPC分类号： G11B7/085 ,  G11B7/09 ,  G11B7/135

CPC分类号： G11B7/1374 ,  G11B7/0956 ,  G11B7/121 ,  G11B2007/0006

摘要： An optical-pickup apparatus includes first and second objective lenses that focus first and second laser light on information-recording layers of first and second optical discs, the second optical disc having an information-recording format different from that of the first optical disc; and a lens holder that integrally holds the first and second objective lenses in an adjacent manner, a disc surface of the first optical disc and of the second optical disc being substantially parallel to confronting faces of the first and second objective lenses, that confront the disc surface, a minimum distance between the disc surface and the confronting faces in a direction of an optical axis of the turntable being greater than a thickness of the turntable in a direction of a rotation axis of the turntable, either one or both of the first and second objective lenses configured to focus bluish-violet laser light on an optical disc.

摘要翻译： 光拾取装置包括将第一和第二激光聚焦在第一和第二光盘的信息记录层上的第一和第二物镜，第二光盘具有不同于第一光盘的信息记录格式; 以及以相邻的方式整体地保持所述第一和第二物镜的透镜保持架，所述第一光盘和所述第二光盘的盘表面基本上平行于所述第一和第二物镜的面对的所述盘， 在转台的光轴方向上的盘表面与面对面之间的最小距离大于转台的旋转轴的方向上的厚度，第一和第二 第二物镜被配置为将蓝紫色激光聚焦在光盘上。

公开(公告)号：US20080074764A1

公开(公告)日：2008-03-27

申请号：US11681586

申请日：2007-03-02

申请人： Ryoichi Kawasaki ,  Hiroyuki Shindo

发明人： Ryoichi Kawasaki ,  Hiroyuki Shindo

IPC分类号： G02B7/02

CPC分类号： G11B7/0935 ,  G11B7/1275 ,  G11B7/1374 ,  G11B2007/0006

摘要： A lens holder is disclosed which holds a plurality of objective lenses, the lens holder holding the plurality of objective lenses so as to be arranged with a composite gravity center position of the plurality of objective lenses matching a gravity center position of the entire lens holder without the plurality of objective lenses.

摘要翻译： 公开了一种保持多个物镜的透镜保持器，透镜架保持多个物镜，以使多个物镜的复合重心位置与整个透镜保持架的重心位置相匹配，而没有 多个物镜。

公开(公告)号：US20070223320A1

公开(公告)日：2007-09-27

申请号：US11683839

申请日：2007-03-08

申请人： Ryoichi Kawasaki ,  Hiroyuki Shindo

发明人： Ryoichi Kawasaki ,  Hiroyuki Shindo

IPC分类号： G11B11/00

CPC分类号： G11B7/13925 ,  G02B7/08

摘要： A lens driving apparatus comprising: a first lens-barrel having a lens built thereinto; a second lens-barrel; an electromechanical conversion element that applies a driving force f1 to the first lens-barrel and a driving force f2 to the second lens-barrel; and a housing that supports the lateral surfaces of the first lens-barrel and the second lens-barrel such that a lens-barrel body is mounted slidably on the housing in the light axis direction of the lens, the lens barrel body being the first lens-barrel and the second lens-barrel connected via the electromechanical conversion element therebetween, wherein the electromechanical conversion element generates deformation which results in displacement in the light axis direction of the lens by applying a drive voltage, and wherein the first lens-barrel generates an inertia force IF1 and a friction force FF1 with the support surface of the housing by applying the driving force f1, and wherein the second lens-barrel generates an inertia force IF2 and a friction force FF2 with the support surface of the housing by applying the driving force f2, and wherein the lens-barrel body is driven to one side in the light axis direction of the lens, such that a relationship of f1 IF2+FF2 holds, when the electromechanical conversion element generates the deformation so as to increase an interval between the first lens-barrel and the second lens-barrel, and such that a relationship of f1>IF1+FF1 as well as f2 IF1+FF1 as well as f2 IF2+FF2 holds, when the electromechanical conversion element generates the deformation so as to reduce an interval between the first lens-barrel and the second lens-barrel.

公开(公告)号：US07921437B2

公开(公告)日：2011-04-05

申请号：US11626779

申请日：2007-01-24

申请人： Ryoichi Kawasaki ,  Hiroyuki Shindo

发明人： Ryoichi Kawasaki ,  Hiroyuki Shindo

IPC分类号： G11B7/085 ,  G11B7/09 ,  G11B7/135

CPC分类号： G11B7/1374 ,  G11B7/0956 ,  G11B7/121 ,  G11B2007/0006

摘要： An optical pickup apparatus including a first objective lens that focuses first laser light on an information recording layer of a first optical disc in a first mounting state where the first optical disc is mounted on a turntable; a second objective lens that focuses second laser light on an information recording layer of a second optical disc in a second mounting state where the second optical disc is mounted on the turntable, the second optical disc having an information recording format different from that of the first optical disc; and a lens holder that integrally holds the first objective lens and the second objective lens in an adjacent manner on the outside and inside, respectively, along a radial direction of the first optical disc in the first mounting state and of the second optical disc in the second mounting state.

摘要翻译： 一种光拾取装置，包括第一物镜，该第一物镜在第一安装状态下将第一激光聚焦在第一光盘的信息记录层上，其中第一光盘安装在转盘上; 第二物镜，其在第二安装状态下将第二激光聚焦在第二光盘的信息记录层上，其中第二光盘安装在转盘上，第二光盘具有不同于第一光盘的信息记录格式 光盘; 以及透镜保持件，其在第一安装状态下沿着第一光盘的径向分别在外侧和内侧相邻地一体地保持第一物镜和第二物镜;以及第二光盘中的第二光盘 第二安装状态。

公开(公告)号：US20110191794A1

公开(公告)日：2011-08-04

申请号：US13036739

申请日：2011-02-28

申请人： Ryoichi Kawasaki ,  Hiroyuki Shindo

发明人： Ryoichi Kawasaki ,  Hiroyuki Shindo

IPC分类号： G11B7/08

CPC分类号： G11B7/1374 ,  G11B7/0956 ,  G11B7/121 ,  G11B2007/0006

摘要： An optical-pickup apparatus includes first and second objective lenses that focus first and second laser light on information-recording layers of first and second optical discs, the second optical disc having an information-recording format different from that of the first optical disc; and a lens holder that integrally holds the first and second objective lenses in an adjacent manner, a disc surface of the first optical disc and of the second optical disc being substantially parallel to confronting faces of the first and second objective lenses, that confront the disc surface, a minimum distance between the disc surface and the confronting faces in a direction of an optical axis of the turntable being greater than a thickness of the turntable in a direction of a rotation axis of the turntable, either one or both of the first and second objective lenses configured to focus bluish-violet laser light on an optical disc.

摘要翻译： 光拾取装置包括将第一和第二激光聚焦在第一和第二光盘的信息记录层上的第一和第二物镜，第二光盘具有不同于第一光盘的信息记录格式; 以及以相邻的方式整体地保持所述第一和第二物镜的透镜保持架，所述第一光盘和所述第二光盘的盘表面基本上平行于所述第一和第二物镜的面对的所述盘， 在转台的光轴方向上的盘表面与面对面之间的最小距离大于转台的旋转轴的方向上的厚度，第一和第二 第二物镜被配置为将蓝紫色激光聚焦在光盘上。

公开(公告)号：US20080212452A1

公开(公告)日：2008-09-04

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：US08363533B2

公开(公告)日：2013-01-29

申请号：US13416858

申请日：2012-03-09

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 includes an objective lens having a numeric aperture and an incident face. An antireflection coating is formed on the incident face. A collimating lens converts laser light from a laser diode into parallel light, and causes the parallel light to be made incident on the incident face through the antireflection coating. The thickness of the antireflection coating causes a transmittance of laser light that enters the objective lens to be: set at a first predetermined transmittance value, when the numeric aperture is between zero and a first predetermined numeric aperture value; set to correlate linearly with the numeric aperture when the numeric aperture is between the first predetermined numeric aperture value and a second predetermined numeric aperture value; and set at a second predetermined transmittance value, when the numeric aperture is between the second predetermined numeric aperture value and a third predetermined numeric aperture value.

摘要翻译： 光学拾取装置包括具有数字孔径和入射面的物镜。 在入射面上形成防反射涂层。 准直透镜将来自激光二极管的激光转换为平行光，并使平行光通过抗反射涂层入射到入射面上。 当数值孔径在零和第一预定数值孔径值之间时，防反射涂层的厚度使进入物镜的激光的透射率设定为第一预定透射率值; 当数值孔径在第一预定数值孔径值和第二预定数值孔径值之间时，被设置为与数字孔径线性相关; 并且当所述数值孔径在所述第二预定数值孔径值和第三预定数值孔径值之间时，设定在第二预定透射率值。

公开(公告)号：US20120170441A1

公开(公告)日：2012-07-05

申请号：US13416858

申请日：2012-03-09

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： G11B7/1376 ,  G11B7/1374

CPC分类号： G11B7/1374 ,  G11B7/139

摘要： An optical pickup apparatus includes an objective lens having a numeric aperture and an incident face. An antireflection coating is formed on the incident face. A collimating lens converts laser light from a laser diode into parallel light, and causes the parallel light to be made incident on the incident face through the antireflection coating. The thickness of the antireflection coating causes a transmittance of laser light that enters the objective lens to be: set at a first predetermined transmittance value, when the numeric aperture is between zero and a first predetermined numeric aperture value; set to correlate linearly with the numeric aperture when the numeric aperture is between the first predetermined numeric aperture value and a second predetermined numeric aperture value; and set at a second predetermined transmittance value, when the numeric aperture is between the second predetermined numeric aperture value and a third predetermined numeric aperture value.

摘要翻译： 光学拾取装置包括具有数字孔径和入射面的物镜。 在入射面上形成防反射涂层。 准直透镜将来自激光二极管的激光转换为平行光，并使平行光通过抗反射涂层入射到入射面上。 当数值孔径在零和第一预定数值孔径值之间时，防反射涂层的厚度使进入物镜的激光的透射率设定为第一预定透射率值; 当数值孔径在第一预定数值孔径值和第二预定数值孔径值之间时，被设置为与数字孔径线性相关; 并且当所述数值孔径在所述第二预定数值孔径值和第三预定数值孔径值之间时，设定在第二预定透射率值。

公开(公告)号：US07778119B2

公开(公告)日：2010-08-17

申请号：US11696533

申请日：2007-04-04

申请人： Ryoichi Kawasaki ,  Hiroyuki Shindo

发明人： Ryoichi Kawasaki ,  Hiroyuki Shindo

IPC分类号： G11B7/00

CPC分类号： G11B7/0933 ,  G11B7/0903 ,  G11B7/1374 ,  G11B2007/0006

摘要： An objective lens holding device includes a first objective lens, a second objective lens, and a lens holder, wherein an axis-to-axis distance between a central axis of the first objective lens and a central axis of the second objective lens is set to a distance, depending on a first length and a second length, which distance prevents a second edge portion from butting against a turntable when the first objective lens focuses light from a first laser on an innermost circumference of the information recording layer of an optical disc.

摘要翻译： 物镜保持装置包括第一物镜，第二物镜和透镜保持器，其中将第一物镜的中心轴与第二物镜的中心轴之间的轴线与轴之间的距离设定为 一段距离，取决于第一长度和第二长度，当第一物镜将来自第一激光的光聚焦在光盘的信息记录层的最内周上时，该距离防止第二边缘部分抵靠转台。