公开(公告)号：US07813233B2

公开(公告)日：2010-10-12

申请号：US11702159

申请日：2007-02-05

申请人： Hideaki Hirai

发明人： Hideaki Hirai

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B7/1369 ,  G11B2007/0013

摘要： An optical pickup unit includes a light source emitting a light beam, an objective lens focusing the light beam onto an information recording medium, a light detection part receiving the light beam reflected from the information recording medium, and a light blocking part selectively blocking a part of the light beam with respect to a radial direction. The light blocking part is provided in an optical path of the light beam centered on an optical axis.

摘要翻译： 光拾取单元包括发射光束的光源，将光束聚焦到信息记录介质上的物镜，接收从信息记录介质反射的光束的光检测部分和选择性地阻挡部分的光阻挡部分 的光束相对于径向方向。 光阻挡部设置在以光轴为中心的光束的光路中。

公开(公告)号：US20090231981A1

公开(公告)日：2009-09-17

申请号：US12403666

申请日：2009-03-13

申请人： Hideaki Hirai

发明人： Hideaki Hirai

IPC分类号： G11B7/135

CPC分类号： G11B7/131 ,  G11B7/0903 ,  G11B7/1367 ,  G11B7/1381 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup including a light source, a light focus device, a diffraction element, an optical split element, a ¼ wavelength board, a light reception device and a correction element wherein the correction element is divided into multiple areas in a surface vertical to an optical axis, each area of the multiple areas has a sub-wavelength convexo-concave structure having a pitch equal to or shorter than a wavelength of the outgoing light beam and the sub-wavelength convexo-concave structures of the multiple areas adjacent to each other have groove directions perpendicular to each other, and the filling factors of adjacent areas of the multiple areas are determined to substantially equalize effective refractive indices with regard to the polarization direction of the outgoing beam emitted from the light source and impart a phase difference of π with regard to a polarization direction perpendicular to the polarization direction of the outgoing beam.

摘要翻译： 一种光拾取器，包括光源，光聚焦装置，衍射元件，光分离元件，1/4波长板，光接收装置和校正元件，其中校正元件被分成与垂直于 光轴，多个区域的每个区域具有间隔等于或短于出射光束的波长和相邻的多个区域的亚波长凹凸结构的间距的亚波长凹凸结构 具有彼此垂直的槽方向，并且确定多个区域的相邻区域的填充因子，以相对于从光源发射的出射光束的偏振方向基本上相等化有效折射率，并且将pi的相位差与 关于垂直于出射光束的偏振方向的偏振方向。

公开(公告)号：US07385906B2

公开(公告)日：2008-06-10

申请号：US11798907

申请日：2007-05-17

申请人： Hideaki Hirai

发明人： Hideaki Hirai

IPC分类号： G11B7/135

CPC分类号： G11B7/1275 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B7/13925 ,  G11B2007/0006

摘要： An optical pickup includes a first optical source producing a first optical beam having a wavelength λ1, a second optical source producing a second optical beam having a wavelength λ2 (λ1

摘要翻译： 光拾取器包括产生具有波长λ1的第一光束的第一光源，产生具有波长λ2（λ1λ2）的第二光束的第二光源，以及聚焦第一 和第二光束到光记录介质，第一光束作为平行光束入射到物镜上，第二光束作为发散光入射到物镜，其中孔设置在物镜的前侧 物镜从前侧的主点偏离距离t，由公式<？in-line-formula description =“In-line Formulas”end =“lead”？> t = L-NA1.f / tan（a sin（NA2obj）），<？in-line-formula description =“In-line Formulas”end =“tail”？>其中f表示物镜的焦距，NA 1表示 当第一光源被接通时，图像表面的一侧，NA 2 obj表示 当第二光源被接通时，在前侧的数值孔径，L表示当第二光源被接通时的物体距离。

公开(公告)号：US07345967B2

公开(公告)日：2008-03-18

申请号：US11201197

申请日：2005-08-11

申请人： Hideaki Hirai

发明人： Hideaki Hirai

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B7/1369 ,  G11B2007/0013

摘要： An optical pickup unit includes a light source emitting a light beam, an objective lens focusing the light beam onto an information recording medium, a light detection part receiving the light beam reflected from the information recording medium, and a light blocking part selectively blocking a part of the light beam with respect to a radial direction. The light blocking part is provided in an optical path of the light beam centered on an optical axis.

摘要翻译： 光拾取单元包括发射光束的光源，将光束聚焦到信息记录介质上的物镜，接收从信息记录介质反射的光束的光检测部分和选择性地阻挡部分的光阻挡部分 的光束相对于径向方向。 遮光部设置在以光轴为中心的光束的光路中。

公开(公告)号：US20070133372A1

公开(公告)日：2007-06-14

申请号：US11702159

申请日：2007-02-05

申请人： Hideaki Hirai

发明人： Hideaki Hirai

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B7/1369 ,  G11B2007/0013

摘要： An optical pickup unit includes a light source emitting a light beam, an objective lens focusing the light beam onto an information recording medium, a light detection part receiving the light beam reflected from the information recording medium, and a light blocking part selectively blocking a part of the light beam with respect to a radial direction. The light blocking part is provided in an optical path of the light beam centered on an optical axis.

摘要翻译： 光拾取单元包括发射光束的光源，将光束聚焦到信息记录介质上的物镜，接收从信息记录介质反射的光束的光检测部分和选择性地阻挡部分的光阻挡部分 的光束相对于径向方向。 遮光部设置在以光轴为中心的光束的光路中。

公开(公告)号：US20070030770A1

公开(公告)日：2007-02-08

申请号：US11580019

申请日：2006-10-13

申请人： Hideaki Hirai

发明人： Hideaki Hirai

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G02F1/134309 ,  G02F2203/18 ,  G11B7/123 ,  G11B7/127 ,  G11B7/131 ,  G11B7/1365 ,  G11B7/1369 ,  G11B7/139 ,  G11B7/13925 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup performing recording, reproduction and deletion of information onto an optical recording medium, said optical pickup includes light sources of blue wavelength zone, red wavelength zone and infrared wavelength zone; a single object lens which condenses a light from any of the light sources; and a single aberration correction device disposed in a common light path between each of the light sources and the object lens.

摘要翻译： 一种光学拾取器，其将信息记录，再现和删除到光学记录介质上，所述光学拾取器包括蓝色波长区域，红色波长区域和红外波长区域的光源; 将来自任何光源的光聚光的单个物镜; 以及设置在每个光源和物镜之间的公共光路中的单个像差校正装置。

公开(公告)号：US20060198254A1

公开(公告)日：2006-09-07

申请号：US11369967

申请日：2006-03-08

申请人： Hideaki Hirai ,  Hiroyuki Inoue

发明人： Hideaki Hirai ,  Hiroyuki Inoue

IPC分类号： G11B7/00

CPC分类号： G11B7/0956 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/13925 ,  G11B2007/0006

摘要： The present invention relates to an objective lens, an optical pickup, and an optical information processing apparatus. Although coma aberration of approximately 0.22 λ rms, 0.14 λ rms, and 0.09 λ rms is generated in a case where blue type, DVD type, and CD type media is tilted 1 degree, respectively, the coma aberration from medium tilt can be corrected by lens tilt by using an objective lens satisfying the conditions of |CLx/CDx|≧1, wherein CDx (x=1,2,3) is the value of each least square error (unit: λ rms) of the third order coma aberration components generated per angle when the substrates of the medium is tilted, wherein CLx (x=1,2,3) is the value of each least square error (unit: λ rms) of the third order coma aberration components generated per angle when the objective lens is tilted during the converging and irradiating to the medium.

摘要翻译： 本发明涉及物镜，光拾取器和光信息处理装置。 虽然在蓝色类型，DVD型和CD型介质分别倾斜1度的情况下，产生约0.22λrms，0.14λrms和0.09λ均方根的彗形像差，但来自中等倾斜度的彗形像差可以通过 通过使用满足条件| CLx / CDx | = 1的物镜的透镜倾斜，其中CDx（x = 1,2,3）是三阶彗差的每个最小平方误差（单位：lambda rms）的值 当介质的基板倾斜时，每角度产生像差分量，其中CLx（x = 1,2,3）是每角度产生的三阶彗形像差分量的每个最小平方误差（单位:λrms）的值， 在会聚和照射介质期间物镜倾斜。

公开(公告)号：US20060158977A1

公开(公告)日：2006-07-20

申请号：US11373234

申请日：2006-03-13

申请人： Hideaki Hirai ,  Shigeru Ohuchida

发明人： Hideaki Hirai ,  Shigeru Ohuchida

IPC分类号： G11B7/00

CPC分类号： G11B7/1356 ,  G11B7/123 ,  G11B7/127 ,  G11B7/1359 ,  G11B7/1362 ,  G11B7/1365 ,  G11B2007/0006

摘要： An optical pickup unit includes first and second light sources of first and second wavelengths, respectively, a dichroic element, a phase plate, and an objective lens. One of the first and second light sources is selected so that information recording or reproduction is performed by converging a light beam emitted from the selected one of the first and second light sources on an optical recording medium via the dichroic element, the phase plate, and the objective lens.

公开(公告)号：US07050380B2

公开(公告)日：2006-05-23

申请号：US10086442

申请日：2002-03-04

申请人： Hideaki Hirai ,  Hiroshi Akiyama

发明人： Hideaki Hirai ,  Hiroshi Akiyama

IPC分类号： G11B7/00

CPC分类号： G11B7/1356 ,  G11B7/123 ,  G11B7/127 ,  G11B7/1359 ,  G11B7/1362 ,  G11B7/1365 ,  G11B2007/0006

摘要： An optical pickup unit includes first and second light sources of first and second wavelengths, respectively, a dichroic element, a phase plate, and an objective lens. One of the first and second light sources is selected so that information recording or reproduction is performed by converging a light beam emitted from the selected one of the first and second light sources on an optical recording medium via the dichroic element, the phase plate, and the objective lens.