公开(公告)号：US07038852B2

公开(公告)日：2006-05-02

申请号：US10003216

申请日：2001-12-06

申请人： Koji Takahara ,  Kyu Takada ,  Koujirou Sekine ,  Takuji Hatano

发明人： Koji Takahara ,  Kyu Takada ,  Koujirou Sekine ,  Takuji Hatano

IPC分类号： G02B27/28 ,  G02B5/30

CPC分类号： G02B5/3033

摘要： A polarization conversion optical system converts light having a nonuniform plane of polarization into light having a uniform plane of polarization. The system includes a multilayer dielectric film at the side upon which the target light is incident. The film exhibits the property that it reflects one polarized component of the light and transmits a second polarized component of the light at a first angle of incidence, but transmits the first component at a second angle of incidence. Incident target light that is transmitted through the film at the first angle of incidence passes through a quarter-wavelength plate and is reflected at the second angle, whereupon it is retransmitted through the quarter-wavelength plate to be converted from one plane of polarization to the other. It is then emitted from the dielectric film in the same plane of polarization as light reflected by the film.

公开(公告)号：US06785029B2

公开(公告)日：2004-08-31

申请号：US09865625

申请日：2001-05-29

申请人： Kyu Takada ,  Takuji Hatano

发明人： Kyu Takada ,  Takuji Hatano

IPC分类号： G02B2608

CPC分类号： G02B5/09 ,  G02B5/0833 ,  G02B26/123 ,  G02B27/28

摘要： An optical scanner having a simple structure in which the light quantities of a plurality of light beams are not varied by differences in polarization direction among the light beams. The optical scanner scans a surface by means of a plurality of light beams in which the polarization direction of at least one of the light beams is different from the polarization directions of the other light beams. An optical element having a surface with a reflectance for s-polarized light and a reflectance for p-polarized light that are substantially the same at a given incident angle is provided in the optical paths of the light beams.

摘要翻译： 一种具有简单结构的光学扫描器，其中多个光束的光量不会因光束中的偏振方向的差异而变化。 光扫描仪通过多个光束扫描表面，其中至少一个光束的偏振方向与其他光束的偏振方向不同。 在光束的光路中设置有具有对于s偏振光具有反射率的表面和在给定入射角基本上相同的p偏振光的反射率的光学元件。

公开(公告)号：US06853760B2

公开(公告)日：2005-02-08

申请号：US09765229

申请日：2001-01-18

申请人： Koujirou Sekine ,  Mitsuru Yokoyama ,  Miyuki Teramoto ,  Kyu Takada ,  Takuji Hatano ,  Shinji Maruyama ,  Tsuyoshi Iwamoto

发明人： Koujirou Sekine ,  Mitsuru Yokoyama ,  Miyuki Teramoto ,  Kyu Takada ,  Takuji Hatano ,  Shinji Maruyama ,  Tsuyoshi Iwamoto

IPC分类号： G02B5/18 ,  G02B6/12 ,  G02B6/122 ,  G02B6/42 ,  G02F1/01 ,  G02F1/125 ,  G02F1/13 ,  G02F1/295 ,  G02F1/313 ,  G02F1/335 ,  G02B6/36

CPC分类号： G02F1/125 ,  B82Y20/00 ,  G02B6/1225 ,  G02B6/42 ,  G02B2006/12145 ,  G02B2006/12164 ,  G02F1/01 ,  G02F1/295 ,  G02F1/313 ,  G02F2202/32 ,  G02F2203/055

摘要： On a waveguide 34 formed on a substrate 33, a plurality of comblike shaped electrodes 37, 38 that generate surface acoustic waves 37a, 38a from different directions are provided. And a periodic refractive indices portion 40 is formed, where the refractive indices are periodically distributed in accordance with the wavelengths of the surface acoustic waves 37a, 38a generated by applying a voltage to the comblike shaped electrodes 37, 38. And by changing a frequency of the applying voltage for sequentially changing the wavelengths of the surface acoustic waves 37a, 38a, the exiting direction of the light exiting from the periodic refractive indices portion 40 is scanned. This makes it possible to provide an optical functional device and an optical scanning apparatus that perform light scanning less costly but at a high speed, and that can secure a wide scanning angle.

摘要翻译： 在形成在基板33上的波导34上，设置有从不同方向产生表面声波37a，38a的多个梳状电极37,38。 并且形成周期性折射率部分40，其中折射率根据通过向梳状电极37,38施加电压而产生的声表面波37a，38a的波长周期性地分布。并且通过改变频率 扫描从周期性折射率部分40出射的光的顺行改变表面声波37a，38a的波长的出射方向的施加电压。 这使得可以提供一种光学功能器件和光学扫描装置，该光学功能器件和光学扫描装置执行光扫描成本较低但高速度，并且可以确保宽的扫描角度。

公开(公告)号：US06822796B2

公开(公告)日：2004-11-23

申请号：US09988647

申请日：2001-11-20

申请人： Kyu Takada ,  Takuji Hatano ,  Koji Takahara ,  Koujirou Sekine

发明人： Kyu Takada ,  Takuji Hatano ,  Koji Takahara ,  Koujirou Sekine

IPC分类号： G02B518

CPC分类号： G02B27/4272 ,  G02B5/1823 ,  G02B5/1861

摘要： A diffractive optical element has a diffraction grating formed by periodic depressions and projections on the surface of a substrate and a dielectric multilayer film on the diffraction grating. The materials of the respective layers of the film are chosen such that the depth of the depressions is an integral multiple of the sum of the thickness of the layers in one period of the film. As a result, individual layers of the film are continuous across multiple depressions and projections, to provide improved first-order reflectance.

摘要翻译： 衍射光学元件具有由衍射光栅上的基板表面上的周期性凹凸和电介质多层膜形成的衍射光栅。 选择膜的各层的材料，使得凹陷的深度是膜的一个周期中层的厚度之和的整数倍。 结果，膜的单个层在多个凹陷和突起之间是连续的，以提供改进的一级反射率。

公开(公告)号：US06466708B2

公开(公告)日：2002-10-15

申请号：US09745463

申请日：2000-12-26

申请人： Mitsuru Yokoyama ,  Takuji Hatano ,  Kyu Takada ,  Miyuki Teramoto ,  Koujirou Sekine

发明人： Mitsuru Yokoyama ,  Takuji Hatano ,  Kyu Takada ,  Miyuki Teramoto ,  Koujirou Sekine

IPC分类号： G02B612

CPC分类号： G02B6/12007 ,  B82Y20/00 ,  G02B6/1225 ,  G02B6/13 ,  G02B2006/12176

摘要： An optical module has a substrate, a waveguide, formed on the substrate, for guiding light, and a photonic crystal portion that has media having different refractive indices arranged in a periodic pattern and that is disposed in a channel of the waveguide on the substrate. Here, the photonic crystal and the substrate are integrally formed. The formation comprises the steps of forming an aluminum film on the top of a conductive substrate, forming a protective film on the aluminum film, removing the protective film from a predetermined area to form a window over the predetermined area, anodizing the aluminum film exposed through the window to form photonic crystals, removing the protective film, cladding the bottom of the substrate and forming a core layer over the cladded bottom.

摘要翻译： 光学模块具有形成在基板上的用于引导光的基板，波导管，以及具有以周期性图案排列的不同折射率的介质的光子晶体部分，其设置在基板上的波导的通道中。 这里，光子晶体和基板一体形成。 该形成包括以下步骤：在导电基板的顶部形成铝膜，在铝膜上形成保护膜，从预定区域去除保护膜，以在预定区域上形成窗口，阳极氧化暴露于该铝膜的铝膜 形成光子晶体的窗口，去除保护膜，包覆基底的底部并在包覆的底部上形成芯层。

公开(公告)号：US5764397A

公开(公告)日：1998-06-09

申请号：US755013

申请日：1996-11-22

申请人： Nozomu Inoue ,  Yujiro Nomura ,  Takashi Hama ,  Kyu Takada

发明人： Nozomu Inoue ,  Yujiro Nomura ,  Takashi Hama ,  Kyu Takada

IPC分类号： G02B26/12 ,  G02B26/08

CPC分类号： G02B26/129

摘要： An optical scanner comprises: a light source; beam shaping optics for transforming an optical beam from the light source into a convergent beam; a rotating polygonal mirror having at least a first reflecting face for deflecting the convergent beam and a second reflecting face; and transmission optics having a lens, with which the optical beam deflected by the first reflecting face of the rotating polygonal mirror is allowed to be incident on the second reflecting face of the rotating polygonal mirror, with the optical beam incident on the second reflecting face of the rotating polygonal mirror being deflected therefrom to produce a scanning optical beam which scans a predetermined surface to be scanned, wherein the convergent optical beam forms a focused image at a point located between the first reflecting face of the rotating polygonal mirror and the lens in the transmission optics.

摘要翻译： 光学扫描器包括：光源; 光束整形光学器件，用于将光束从光源变换成会聚光束; 旋转多面镜，具有至少第一反射面，用于偏转会聚光束和第二反射面; 以及具有透镜的透射光学器件，由旋转多面镜的第一反射面偏转的光束通过该透镜入射到旋转多面镜的第二反射面上，光束入射在旋转多面镜的第二反射面上 旋转多面镜从其偏转以产生扫描要扫描的预定表面的扫描光束，其中会聚光束在位于旋转多面镜的第一反射面和透镜之间的点处形成聚焦图像 传输光学。

公开(公告)号：US08786965B2

公开(公告)日：2014-07-22

申请号：US13498575

申请日：2010-08-17

申请人： Kenichi Ishii ,  Kyu Takada

发明人： Kenichi Ishii ,  Kyu Takada

IPC分类号： G02B3/02 ,  G02B3/00 ,  G11B7/1374

CPC分类号： G11B7/1374 ,  B23B1/00 ,  B23B27/005 ,  B23B27/06 ,  B29C33/424 ,  B29D11/00009 ,  B29D11/0048 ,  G02B5/1895 ,  G11B7/1353 ,  G11B7/13922 ,  G11B7/22 ,  G11B2007/0006

摘要： A method for processing a material for a die for molding an objective lens which is formed with a multilevel structure on the curved surface thereof, wherein the transfer surface of the objective lens is cut by a tool having a cutting face, the outline of which includes a linear first edge portion, a linear second edge portion extending in a direction which intersects the first edge portion at an acute angle thereto, and a third edge portion which joins the ends of the first and second edge portions, while the die material is rotated around the axis thereof, in a state in which at least the first edge portion and the second edge portion of the tool is inclined with respect to the axis and while the tool is moved only in the axial direction and in the direction which intersects the axis.

摘要翻译： 一种在其弯曲表面上形成多层结构的用于模制成型物镜的模具的材料的处理方法，其中物镜的转印面被具有切割面的工具切割，其轮廓包括 线性第一边缘部分，沿着与第一边缘部分成锐角相交的方向延伸的线性第二边缘部分，以及连接第一边缘部分和第二边缘部分的端部的第三边缘部分，同时模具材料旋转 在其工具的至少第一边缘部分和第二边缘部分相对于轴线倾斜的状态下，并且当工具仅在轴向方向和与轴线相交的方向上移动时 。

公开(公告)号：US08111602B2

公开(公告)日：2012-02-07

申请号：US12999856

申请日：2009-06-01

申请人： Kyu Takada ,  Kiyono Tateyama ,  Kentarou Nakamura

发明人： Kyu Takada ,  Kiyono Tateyama ,  Kentarou Nakamura

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G02B3/04 ,  G02B5/1895 ,  G11B7/1374 ,  G11B7/13922

摘要： Provided are an optical pickup apparatus and an objective lens which can record and/or reproduce information for discs with different recording densities and can realize simplification of the structure of themselves and reducing cost. When the expression (1) is satisfied, step differences of a step structure can be further reduced than those in the case that d1=λ1(n−1) holds, and fine grooves corresponding to a steps structure, formed on an optical-surface transfer surface of a mold for molding the objective lens become shallow, to be easily processed. In addition, the moldability is enhanced because the material of the objective lens easily enters the inner portion of the grooves. Further, a fluctuation of a diffraction efficiency caused when wavelength of a light flux changes or temperature changes is reduced so that information can be recorded and/or reduced stably.

摘要翻译： 提供一种能够记录和/或再现具有不同记录密度的盘的信息的光学拾取装置和物镜，并且可以实现其自身的结构的简化并降低成本。 当满足表达式（1）时，阶梯结构的步长差可以比在d1 =λ1（n-1）成立的情况下的阶梯差更进一步降低，并且形成在光学表面上的与阶梯结构相对应的细槽 用于模制物镜的模具的转印表面变浅，易于加工。 此外，由于物镜的材料容易进入槽的内部，所以成型性得到提高。 此外，当光束波长变化或温度变化时引起的衍射效率的波动减小，从而可以稳定地记录和/或降低信息。

公开(公告)号：US08665425B2

公开(公告)日：2014-03-04

申请号：US13640709

申请日：2011-04-05

申请人： Kazuyuki Ogura ,  Masahiro Okitsu ,  Youichi Ogawa ,  Kyu Takada

发明人： Kazuyuki Ogura ,  Masahiro Okitsu ,  Youichi Ogawa ,  Kyu Takada

IPC分类号： G01B9/00 ,  G01M11/02

CPC分类号： G01M11/0221 ,  G01M11/025

摘要： In an eccentricity measuring method according to the present invention, a first position of a light source image formed by reflection at one optical surface is measured (S2), a predetermined second position related to another optical surface is measured (S3), and a relative eccentricity between both optical surfaces is calculated based on the first and second positions (S5). Therefore, the eccentricity measuring method enables measurement of eccentricity by a same measurement optical system regardless of a radius of curvature of an optical surface of an optical element.

摘要翻译： 在根据本发明的偏心测量方法中，测量在一个光学表面上由反射形成的光源图像的第一位置（S2），测量与另一个光学表面相关的预定的第二位置（S3），并且相对 基于第一和第二位置计算两个光学表面之间的偏心度（S5）。 因此，偏心测量方法能够通过相同的测量光学系统来测量偏心度，而与光学元件的光学表面的曲率半径无关。

公开(公告)号：US20120182628A1

公开(公告)日：2012-07-19

申请号：US13498575

申请日：2010-08-17

申请人： Kenichi Ishii ,  Kyu Takada

发明人： Kenichi Ishii ,  Kyu Takada

IPC分类号： G02B3/02 ,  B29D11/00

CPC分类号： G11B7/1374 ,  B23B1/00 ,  B23B27/005 ,  B23B27/06 ,  B29C33/424 ,  B29D11/00009 ,  B29D11/0048 ,  G02B5/1895 ,  G11B7/1353 ,  G11B7/13922 ,  G11B7/22 ,  G11B2007/0006

摘要： A method for processing a material for a die for molding an objective lens which is formed with a multilevel structure on the curved surface thereof, wherein the transfer surface of the objective lens is cut by a tool having a cutting face, the outline of which includes a linear first edge portion, a linear second edge portion extending in a direction which intersects the first edge portion at an acute angle thereto, and a third edge portion which joins the ends of the first and second edge portions, while the die material is rotated around the axis thereof, in a state in which at least the first edge portion and the second edge portion of the tool is inclined with respect to the axis and while the tool is moved only in the axial direction and in the direction which intersects the axis.

摘要翻译： 一种在其弯曲表面上形成多层结构的用于模制成型物镜的模具的材料的处理方法，其中物镜的转印面被具有切割面的工具切割，其轮廓包括 线性第一边缘部分，沿着与第一边缘部分成锐角相交的方向延伸的线性第二边缘部分，以及连接第一边缘部分和第二边缘部分的端部的第三边缘部分，同时模具材料旋转 在其工具的至少第一边缘部分和第二边缘部分相对于轴线倾斜的状态下，并且当工具仅在轴向方向和与轴线相交的方向上移动时 。