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：US08830585B2

公开(公告)日：2014-09-09

申请号：US13255171

申请日：2010-04-06

申请人： Hideaki Hirai ,  Toshimichi Nasukawa ,  Kazuhiro Umeki

发明人： Hideaki Hirai ,  Toshimichi Nasukawa ,  Kazuhiro Umeki

IPC分类号： G02B5/30 ,  G02B27/28

CPC分类号： G02B27/28 ,  G02B5/3025

摘要： An optical element transmits incident light having a particular polarization direction mainly by 0-order transmission and diffracts incident light having a perpendicular polarization direction. The optical element includes a periodic structure having a period equal to or greater than the wavelength of the incident light. The periodic structure includes first and second subwavelength concave-convex structures formed perpendicularly adjacent to each other in each period of the periodic structure. The first and the second subwavelength concave-convex structures have a period less than the wavelength of the incident light. A filling factor and a groove depth of the first and the second subwavelength concave-convex structures are determined such that they have the same effective refraction index with respect to the incident light having the particular polarization direction and a phase difference π with respect to the incident light having the particular polarization direction.

摘要翻译： 光学元件主要通过0阶透射来透射具有特定偏振方向的入射光，并衍射具有垂直偏振方向的入射光。 光学元件包括具有等于或大于入射光的波长的周期的周期性结构。 周期性结构包括在周期性结构的每个周期中彼此​​垂直相邻形成的第一和第二亚波长凹凸结构。 第一和第二亚波长凹凸结构的周期小于入射光的波长。 确定第一和第二亚波长凹凸结构的填充因子和凹槽深度，使得它们相对于具有特定偏振方向的入射光和相位差pgr具有相同的有效折射率; 相对于具有特定偏振方向的入射光。

公开(公告)号：US08178010B2

公开(公告)日：2012-05-15

申请号：US12712308

申请日：2010-02-25

申请人： Hideaki Hirai ,  Kazuhiro Umeki

发明人： Hideaki Hirai ,  Kazuhiro Umeki

IPC分类号： B29D11/00 ,  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：US20100278029A1

公开(公告)日：2010-11-04

申请号：US12842369

申请日：2010-07-23

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.

摘要翻译： 公开了一种反射波长板，其使光路偏转并反射，并且相对于具有不同波长的多个入射光增加相位差。 反射波长板包括基板; 层叠在基板上的反射膜; 以及层叠在反射膜上并具有小于或等于多个入射光的最短波长的间距的亚波长凹凸结构。 确定亚波长凹凸结构的填充因子和凹槽深度，以便将具有不同波长的多个入射光中的（k＆pgr）/ 8（其中k是整数）获得的相位差相加。

公开(公告)号：US20050195485A1

公开(公告)日：2005-09-08

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： G02B5/18 ,  G02B6/34 ,  G11B7/22

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上的操作的垂直偏振光束在亚波长衍射光栅中的相位差为2pi的整数倍，因此通过亚波长衍射光栅透射。 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L 1与没有亚波长光栅的通过中心部分的光束的光程长度L 1相同。

公开(公告)号：US5776639A

公开(公告)日：1998-07-07

申请号：US629224

申请日：1996-04-08

申请人： Kazuhiro Umeki ,  Shosen Sato

发明人： Kazuhiro Umeki ,  Shosen Sato

IPC分类号： G03F1/00 ,  G03F1/68 ,  G03F1/76 ,  G03F7/20 ,  H01L21/027 ,  G03F9/00

CPC分类号： G03F7/20 ,  G03F1/50

摘要： A two-dimensional shape of a dotted pattern and optical densities of dots or sizes of dots having the same optical density are calculated as write data on the basis of a target distribution of transmittance. The dotted pattern is optically written on a photosensitive medium in accordance with the calculated write data, using a beam from a light source whose output is stepwise or sequentially variable. A latent dotted pattern on the photosensitive medium is developed, thereby obtaining an exposure mask having a desired two-dimensional distribution of transmittance expressed by the dotted pattern and the optical densities of dots or the sizes of dots having the same optical density.

摘要翻译： 基于透射率的目标分布，计算出具有相同光密度的点状图案和点的光密度或点的尺寸的二维形状作为写入数据。 使用来自光源的光束，根据计算出的写入数据，将光图案光刻地写入光敏介质，该光束的输出为逐步或顺序变化。 显影在感光介质上的潜伏图案，从而获得具有由点状图案所表示的透光率所需的二维分布和点的光密度或具有相同光密度的点的尺寸的曝光掩模。

公开(公告)号：US07195732B2

公开(公告)日：2007-03-27

申请号：US10666257

申请日：2003-09-22

申请人： Kazuhiro Umeki

发明人： Kazuhiro Umeki

IPC分类号： B29C33/38

CPC分类号： B29C35/08 ,  B29C33/3842 ,  B29C35/0894 ,  B29C37/0053 ,  B29C2035/0827 ,  B29D11/00278 ,  B29D11/00365

摘要： A method of fabricating a mold and a method of fabricating an article with the mold is disclosed that is capable of fabricating a high three-dimensional surface structure and extending the service life of the mold. A mold having a fine surface shape of a height less than an object height is fabricated, then the fine surface shape of the mold is transferred to an intermediate mold by dry-etching, and then the fine surface shape of the intermediate mold is further transferred to a final article material by dry-etching. In each transfer step by dry-etching, the etching selection ratio is appropriately adjusted to increase the height of the fine surface structure step by step, so that the fine surface shape of the final article material has the object height. On the surface of the final article material, a preliminary pattern of the object surface shape may be formed beforehand to reduce the required thickness of the curable resin.

摘要翻译： 公开了一种制造模具的方法和使用该模具制造制品的方法，其能够制造高三维表面结构并延长模具的使用寿命。 制造具有小于物体高度的微细表面形状的模具，然后通过干蚀刻将模具的微细表面形状转移到中间模具，然后进一步转印中间模具的微细表面形状 通过干蚀刻到最终制品材料。 在通过干蚀刻的每个转印步骤中，适当地调整蚀刻选择比以逐步增加精细表面结构的高度，使得最终制品的精细表面形状具有物体高度。 在最终制品材料的表面上，可以预先形成物体表面形状的初步图案，以减少所需的可固化树脂的厚度。

公开(公告)号：US5830605A

公开(公告)日：1998-11-03

申请号：US703539

申请日：1996-08-27

申请人： Kazuhiro Umeki ,  Shosen Sato ,  Masaaki Sato

发明人： Kazuhiro Umeki ,  Shosen Sato ,  Masaaki Sato

IPC分类号： G03F7/105 ,  G02B3/00 ,  G02B3/02 ,  G02B5/00 ,  G03F1/70 ,  G03F1/80 ,  G03F7/00 ,  G03F7/26 ,  H01L21/027 ,  G03F9/00

CPC分类号： G02B3/0056 ,  G02B3/0012 ,  G03F1/50 ,  G03F7/001

摘要： To provide a gradation mask which can easily assure distribution of desired exposure intensity. �Means to accomplish the object!A metal and/or metallic compound film 2 (FIG. 1) is uniformly formed on a transparent substrate 1 such that they have a transmittance of 10% or less. An etching mask having a desired pattern is formed on the metal and/or metallic compound film 2. The metal and/or metallic compound film 2 is dry- or wet-etched. The metal and/or metallic compound film 2 is repeatedly subject to patterning and etching steps by using etching masks with different patterns, so that the obtained layers have a thickness Z(X, Y) varying in three or more steps in accordance with desired transmittance.

摘要翻译： 提供可以容易地确保期望的曝光强度的分布的渐变掩模。 实现该目的的手段在透明基板1上均匀地形成金属和/或金属化合物膜2（图1），使其透射率为10％以下。 在金属和/或金属化合物膜2上形成具有所需图案的蚀刻掩模。金属和/或金属化合物膜2是干法或湿法蚀刻的。 通过使用具有不同图案的蚀刻掩模，重复地对金属和/或金属化合物膜2进行图案化和蚀刻步骤，使得所获得的层具有根据期望的透射率在三个或更多个步骤中变化的厚度Z（X，Y） 。

公开(公告)号：US5368908A

公开(公告)日：1994-11-29

申请号：US727067

申请日：1991-07-08

申请人： Wasaburo Ohta ,  Isamu Orima ,  Masashi Nakazawa ,  Yuzi Onodera ,  Kazuhiro Umeki

发明人： Wasaburo Ohta ,  Isamu Orima ,  Masashi Nakazawa ,  Yuzi Onodera ,  Kazuhiro Umeki

IPC分类号： G11B7/24 ,  B32B3/00

CPC分类号： G11B7/24056 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/31678

摘要： An optical information recording medium, for writing in and reading out information by a laser beam, is composed of a recording layer, an anti-reflection layer structure formed on an outer surface section on which the laser beam is directed to be focused, on the recording layer, and the anti-reflection layer structure includes one or more transparent electroconductive film layers.

摘要翻译： 用于通过激光束写入和读出信息的光学信息记录介质由形成在激光束被聚焦的外表面部分上的记录层，抗反射层结构组成， 记录层，抗反射层结构包括一个或多个透明导电膜层。