公开(公告)号：US20050025028A1

公开(公告)日：2005-02-03

申请号：US10878343

申请日：2004-06-29

申请人： Hideaki Hirai ,  Toshimichi Nasukawa ,  Kazuhiro Umeki

发明人： Hideaki Hirai ,  Toshimichi Nasukawa ,  Kazuhiro Umeki

IPC分类号： G02B5/18 ,  G02B3/08 ,  G02B5/30 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135 ,  G11B11/00

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

摘要： An optical pickup is disclosed that includes a simplified phase correction element enabling sufficient correction of spherical aberration and realization of compatibility with blue-light, DVD-type and CD-type optical recording media with a two-stage numerical aperture switching operation. The phase correction element includes a phase shifting part and a diffraction part superposed on the phase shifting part. The phase shifting part has stepwise concentric circular regions including more than two stages. The diffraction part includes periodically arranged projecting and depressed portions formed on the phase shifting part. The phase shifting part suppresses spherical aberration related to red light used for a DVD-type optical recording medium when the object lens is optimized relative to blue light used for a blue-light optical recording medium. The diffraction part sets a most appropriate NA to each of the blue-light, DVD-type and the CD-type optical recording media by switching the numerical aperture.

摘要翻译： 公开了一种光拾取器，其包括简化的相位校正元件，其能够进行球面像差的足够校正，并实现与具有两级数值孔径切换操作的蓝光，DVD型和CD型光学记录介质的兼容性。 相位校正元件包括叠加在相移部上的相移部和衍射部。 相移部分具有包括多于两个阶段的逐步同心圆形区域。 衍射部分包括形成在相移部分上的周期性地布置的突出和凹陷部分。 当相对于用于蓝光光记录介质的蓝光优化物镜时，相移部抑制与用于DVD型光记录介质的红光相关的球面像差。 通过切换数值孔径，衍射部分为每个蓝光DVD类型和CD型光记录介质设置最合适的NA。

公开(公告)号：US08154976B2

公开(公告)日：2012-04-10

申请号：US12550997

申请日：2009-08-31

申请人： Hideaki Hirai ,  Kazuhiro Umeki ,  Toshimichi Nasukawa

发明人： Hideaki Hirai ,  Kazuhiro Umeki ,  Toshimichi Nasukawa

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/1362 ,  G11B7/1367 ,  G11B2007/0006

摘要： Disclosed is a reflecting wavelength plate that deflects and reflects a light path and adds a phase difference with respect to plural incident light having different wavelengths. The reflecting wavelength plate includes a substrate; a reflecting film laminated on the substrate; and a sub-wavelength concavo-convex structure that is laminated on the reflecting film and has a pitch less than or equal to the shortest wavelength of the plural incident light. The filling factor and the groove depth of the sub-wavelength concavo-convex structure are determined so as to add the phase difference obtained by (kπ)/8, where k is an integer, to the plural incident light having the different wavelengths.

公开(公告)号：US20100135130A1

公开(公告)日：2010-06-03

申请号：US12531193

申请日：2008-04-15

申请人： Yukiko Hamano ,  Hideaki Hirai ,  Toshimichi Nasukawa ,  Kazuhiro Umeki

发明人： Yukiko Hamano ,  Hideaki Hirai ,  Toshimichi Nasukawa ,  Kazuhiro Umeki

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/1367 ,  G11B7/13922 ,  G11B2007/0006

摘要： A disclosed optical pickup includes an aberration correction unit with a phase shifter surface. On the phase shifter surface, rectangular or staircase-like steps are formed in a concentric manner around an optical axial center, in certain regions where a light beam passes through. The steps have different heights in the optical axial direction. A light beam having a wavelength of 405 nm is directly transmitted through the steps so that a phase difference is applied for correcting spherical aberration that occurs on a first optical recording medium. A light beam that passes through an annular region without any steps is focused on a second optical recording medium. A light beam that passes through an outside region is focused by an object lens on the second optical recording medium, and is not focused on the first optical recording medium.

摘要翻译： 所公开的光拾取器包括具有移相器表面的像差校正单元。 在移相器表面上，在光束通过的某些区域中，围绕光轴心同心地形成矩形或阶梯状台阶。 台阶在光轴方向具有不同的高度。 波长为405nm的光束直接透过该步骤，使得施加相位差来校正出现在第一光学记录介质上的球面像差。 通过没有任何步骤的环形区域的光束被聚焦在第二光学记录介质上。 通过外部区域的光束被物镜聚焦在第二光学记录介质上，并且不聚焦在第一光学记录介质上。

公开(公告)号：US07697395B2

公开(公告)日：2010-04-13

申请号：US11068348

申请日：2005-03-01

申请人： Hideaki Hirai ,  Kazuhiro Umeki

发明人： Hideaki Hirai ,  Kazuhiro Umeki

IPC分类号： G11B7/135

CPC分类号： G11B7/139 ,  G02B5/1809 ,  G02B5/1847 ,  G02B27/4238 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1381 ,  G11B2007/0006

摘要： An optical device having a sub-wavelength grating formed in a specified region is disclosed that is able to prevent wave front degradation accompanying a phase difference of a polarized light beam passing through the optical device. The optical device includes a circular-belt-like region where the sub-wavelength diffraction grating is formed, and a center portion where the sub-wavelength diffraction grating is not formed. A vertically polarized light beam used for operations on a blue-light optical recording medium A has a phase difference in the sub-wavelength diffraction grating to be an integral multiple of 2π and hence is transmitted through the sub-wavelength diffraction grating. A horizontally polarized light beam used for operations on a blue-light optical recording medium is diffracted by the sub-wavelength diffraction grating. The light path length L1 of the light beam passing through the circular-belt-like region is the same as that of the light beam passing through the center portion without the sub-wavelength grating.

摘要翻译： 公开了一种具有形成在特定区域中的子波长光栅的光学器件，其能够防止伴随通过光学器件的偏振光束的相位差的波前劣化。 光学器件包括形成亚波长衍射光栅的圆形带状区域和未形成亚波长衍射光栅的中心部分。 用于在蓝光光记录介质A上操作的垂直偏振光束在亚波长衍射光栅中的相位差为2＆pgr的整数倍; 因此通过亚波长衍射光栅传输。 用于在蓝光光记录介质上操作的水平偏振光束被亚波长衍射光栅衍射。 通过圆形带状区域的光束的光路长度L1与没有亚波长光栅的通过中心部分的光束的光路长度L1相同。

公开(公告)号：US07502300B2

公开(公告)日：2009-03-10

申请号：US10878343

申请日：2004-06-29

申请人： Hideaki Hirai ,  Toshimichi Nasukawa ,  Kazuhiro Umeki

发明人： Hideaki Hirai ,  Toshimichi Nasukawa ,  Kazuhiro Umeki

IPC分类号： G11B7/135

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

摘要： An optical pickup is disclosed that includes a simplified phase correction element enabling sufficient correction of spherical aberration and realization of compatibility with blue-light, DVD-type and CD-type optical recording media with a two-stage numerical aperture switching operation. The phase correction element includes a phase shifting part and a diffraction part superposed on the phase shifting part. The phase shifting part has stepwise concentric circular regions including more than two stages. The diffraction part includes periodically arranged projecting and depressed portions formed on the phase shifting part. The phase shifting part suppresses spherical aberration related to red light used for a DVD-type optical recording medium when the object lens is optimized relative to blue light used for a blue-light optical recording medium. The diffraction part sets a most appropriate NA to each of the blue-light, DVD-type and the CD-type optical recording media by switching the numerical aperture.

摘要翻译： 公开了一种光拾取器，其包括简化的相位校正元件，其能够进行球面像差的足够校正，并实现与具有两级数值孔径切换操作的蓝光，DVD型和CD型光学记录介质的兼容性。 相位校正元件包括叠加在相移部上的相移部和衍射部。 相移部分具有包括多于两个阶段的逐步同心圆形区域。 衍射部分包括形成在相移部分上的周期性地布置的突出和凹陷部分。 当相对于用于蓝光光记录介质的蓝光优化物镜时，相移部抑制与用于DVD型光记录介质的红光相关的球面像差。 通过切换数值孔径，衍射部分为每个蓝光DVD类型和CD型光记录介质设置最合适的NA。

公开(公告)号：US08842211B2

公开(公告)日：2014-09-23

申请号：US13146270

申请日：2010-01-26

申请人： Ryosuke Kasahara ,  Hideaki Hirai

发明人： Ryosuke Kasahara ,  Hideaki Hirai

IPC分类号： H04N5/225 ,  H04N5/228

CPC分类号： H04N9/045 ,  G02B5/1885 ,  H01L27/14621 ,  H01L27/14629 ,  H04N5/2254 ,  H04N5/238

摘要： An imaging element includes a light receiving surface having pixels, and a low-pass filter device configured to focus predetermined light on a predetermined pixel of the pixels of the light-receiving surface.

摘要翻译： 成像元件包括具有像素的光接收表面和被配置为将预定光聚焦在光接收表面的像素的预定像素上的低通滤波器装置。

公开(公告)号：US20140184800A1

公开(公告)日：2014-07-03

申请号：US14235613

申请日：2012-07-24

申请人： Hideaki Hirai ,  Yasuhiro Sato

发明人： Hideaki Hirai ,  Yasuhiro Sato

IPC分类号： H04N9/04 ,  B60R1/00

CPC分类号： H04N9/045 ,  B60R1/00 ,  G01N21/958 ,  G01N2021/9586 ,  G02B5/201 ,  G02B5/3025 ,  G06K9/00791 ,  G06K9/00798 ,  G06K9/00825 ,  H01L27/14621 ,  Y10T156/10

摘要： An imaging device includes an optical filter. The optical filter has a configuration in which a polarization filter layer and a spectral filter layer are laminated in light transmission direction. Of the polarization filter layer and the spectral filter layer, the layer on the lower side in lamination direction has an uneven top face in the lamination direction. The optical filter is formed by filling the uneven top face with a predetermined filling material so as to even out the top face and then forming other layer.

摘要翻译： 成像装置包括滤光器。 滤光器具有在透光方向上层叠偏振光滤光层和光谱过滤层的结构。 在偏振滤光层和光谱滤光层中，层叠方向的下侧的层在层叠方向上具有不平坦的顶面。 滤光器是通过用预定的填充材料填充不平坦的顶面而形成的，以便均匀地排出顶面，然后形成其它层。

公开(公告)号：US20130123985A1

公开(公告)日：2013-05-16

申请号：US13520858

申请日：2011-01-26

申请人： Hideaki Hirai ,  Shin Aoki ,  Masanori Kobayashi ,  Xue Li

发明人： Hideaki Hirai ,  Shin Aoki ,  Masanori Kobayashi ,  Xue Li

IPC分类号： G01N21/84 ,  B25J9/16

CPC分类号： G01N21/84 ,  B25J9/1697 ,  G01N21/21 ,  G01N21/23 ,  G01N21/9018 ,  G01N21/9027 ,  G01N21/958

摘要： A disclosed transparent body detection system includes an image acquisition unit acquiring a vertical polarization image and a horizontal polarization image by acquiring an image of a first region, the image including a transparent body having characteristics in which a polarization direction of transmission light changes; a placing table on which the transparent body is to be placed; a polarization filter disposed opposite to the image acquisition unit across the placing table and at a position including a second region, an image of the second region including at least the transparent body in the first region and being acquired; and an image processing apparatus detecting the transparent body based on distribution of vertical/lateral polarization degree of a vertical/lateral polarization degree image based on the vertical polarization image and the horizontal polarization image.

摘要翻译： 所公开的透明身体检测系统包括通过获取第一区域的图像获取垂直偏振图像和水平偏振图像的图像获取单元，所述图像包括具有其中透射光的偏振方向改变的特性的透明体; 放置桌子，放置透明体; 偏振过滤器，其布置在穿过所述放置台的所述图像获取单元相对并且包括第二区域的位置处，所述第二区域的图像至少包括所述第一区域中的透明体并被获取; 以及基于垂直极化图像和水平偏振图像，基于垂直/横向偏振度图像的垂直/横向偏振度的分布来检测透明体的图像处理装置。

公开(公告)号：US20130027557A1

公开(公告)日：2013-01-31

申请号：US13549917

申请日：2012-07-16

申请人： Hideaki Hirai ,  Izumi Itoh

发明人： Hideaki Hirai ,  Izumi Itoh

IPC分类号： H04N7/18

CPC分类号： B60S1/0844 ,  G01N21/21 ,  G06K9/00791

摘要： A substance detection apparatus and method including a light source to emit light to a planar transparent member having a proximal first face and a distal second face opposite the first face, the light from the light source first striking the first face of the planar transparent member. The substance detection apparatus and method including an image capture lens, a polarization filter, an image sensor, and a substance detection processor. The light emitted from the light source is reflected at the substance present on the second face of the planar transparent member, and the image sensor receives light reflected from the substance, via the image capture lens and the polarization filter, to capture an image of the substance present on the second face of the planar transparent member.

摘要翻译： 一种物质检测装置和方法，其特征在于，包括向具有近端第一面和与第一面相反的远端第二面的平面状透明部件发光的光源，来自光源的光首先撞击平面状透明部件的第一面。 物质检测装置和方法包括图像拍摄透镜，偏振滤光器，图像传感器和物质检测处理器。 从光源发射的光在平面透明构件的第二面上存在的物质反射，并且图像传感器经由图像拍摄透镜和偏振滤光器接收从物质反射的光，以捕获图像 存在于平面透明构件的第二面上的物质。

公开(公告)号：US20120242835A1

公开(公告)日：2012-09-27

申请号：US13514614

申请日：2010-12-16

申请人： Xue Li ,  Soichiro Yokota ,  Hideaki Hirai

发明人： Xue Li ,  Soichiro Yokota ,  Hideaki Hirai

IPC分类号： G06K9/62 ,  H04N7/18

CPC分类号： H04N5/225 ,  G06K9/00798 ,  G06T7/73 ,  G06T2207/20212 ,  G06T2207/30256 ,  G08G1/167

摘要： An imaging device includes an imaging unit mounted on a vehicle and obtaining a vertically-polarized image and a horizontally-polarized image of a road surface on which the vehicle is running; a polarization ratio image generating unit generating a polarization ratio image and calculating polarization ratio information indicating polarization ratios of pixels of the polarization ratio image based on the vertically-polarized image and the horizontally-polarized image; and a roadside structure detection unit detecting a planar line formed on and partitioning the road surface and/or a roadside structure located adjacent to and at an angle with the road surface based on the polarization ratio information of the polarization ratio image.

摘要翻译： 一种成像装置，包括安装在车辆上并获得车辆行驶的路面的垂直偏振图像和水平偏振图像的成像单元; 产生偏振率图像的偏振比图像产生单元，并且基于垂直偏振图像和水平偏振图像计算表示偏振率图像的像素的偏振比的偏振比信息; 以及路边结构检测单元，基于偏振率图像的偏振比信息，检测形成在路面上的划线面和/或与路面相邻并且与路面成一定角度的路边结构。