公开(公告)号：US20120113518A1

公开(公告)日：2012-05-10

申请号：US13126591

申请日：2010-10-26

申请人： Takamasa Ando ,  Seiji Nishiwaki ,  Tsuguhiro Korenaga

发明人： Takamasa Ando ,  Seiji Nishiwaki ,  Tsuguhiro Korenaga

IPC分类号： G02B5/18

CPC分类号： G02B5/1842 ,  G02B5/1871 ,  G02B13/003 ,  G02B27/0037 ,  G02B27/4205

摘要： A diffraction grating lens of the present invention includes a lens base 51 having a surface 51b obtained by providing a diffraction grating 52 on a base shape. The diffraction grating 52 includes a plurality of zones 61A and 61B and a plurality of first diffraction steps 65A and second diffraction steps 65B located between the plurality of zones; the lens base is made of a first material whose refractive index is n1(λ) at a working wavelength λ; and the first diffraction steps 65A and the second diffraction steps 65B have substantially the same height d. The height d satisfies Expression (1) below, where m denotes a diffraction order. A first surface 66A on which tips 63A of the first diffraction steps 65A are located and a second surface 66B on which tips 63B of the second diffraction steps 65B are located are at different positions from each other on an optical axis 53. d = m · λ n 1  ( λ ) - 1 ( 1 )

摘要翻译： 本发明的衍射光栅透镜包括透镜基座51，透镜基座51具有通过提供基底形状的衍射光栅52而获得的表面51b。 衍射光栅52包括位于多个区之间的多个区61A和61B以及多个第一衍射级65A和第二衍射级65B; 透镜基座由工作波长λ的折射率为n1（λ）的第一材料制成; 并且第一衍射级65A和第二衍射级65B具有基本上相同的高度d。 高度d满足下面的式（1），其中m表示衍射级。 第一衍射台阶65A的尖端63A位于其上的第一表面66A和第二衍射台65B的尖端63B位于其上的第二表面66B在光轴53上彼此不同位置。d = m· λn 1（λ）-1（1）

公开(公告)号：US08649095B2

公开(公告)日：2014-02-11

申请号：US13143928

申请日：2010-12-28

申请人： Takamasa Ando ,  Tsuguhiro Korenaga

发明人： Takamasa Ando ,  Tsuguhiro Korenaga

IPC分类号： G02B27/44 ,  G02B3/08

CPC分类号： G02B5/1895 ,  G02B13/0055

摘要： A diffraction grating lens according to the present invention includes a lens body and a diffraction grating provided on the surface of the lens body, the diffraction grating including a plurality of annular zones having slopes inclined along a width direction and a plurality of step surfaces respectively located between the plurality of annular zones. At least one of the plurality of annular zones is light-transmissive across its entire area along the width direction, and in the at least one annular zone, a light transmittance near at least one of two ends along the width direction is smaller than a light transmittance near a central portion along the width direction.

摘要翻译： 根据本发明的衍射光栅透镜包括透镜体和设置在透镜体的表面上的衍射光栅，衍射光栅包括多个具有沿宽度方向倾斜的斜面的环形区域和分别位于多个台阶表面的多个台阶表面 在多个环形区域之间。 多个环形区域中的至少一个沿着宽度方向穿过其整个区域是透光的，并且在至少一个环形区域中，沿着宽度方向的两端中的至少一端附近的透光率小于光 沿着宽度方向的中心部附近的透射率。

公开(公告)号：US08441728B2

公开(公告)日：2013-05-14

申请号：US13000430

申请日：2009-12-18

申请人： Tsuguhiro Korenaga ,  Takamasa Ando

发明人： Tsuguhiro Korenaga ,  Takamasa Ando

IPC分类号： G02B5/18

CPC分类号： G02B13/003 ,  G02B5/1814 ,  G02B13/06 ,  G02B27/4211

摘要： A diffractive lens 11 that includes: a lens base 18, which has a second surface 13 with first and second groups of diffraction grating portions 20 and 21; and a protective coating 17, which is arranged on the first group of diffraction grating portions 20. The first group of diffraction grating portions 20 has a first group of diffraction steps and the second group of diffraction grating portions 21 has a second group of diffraction steps, which is lower in height than the first group of diffraction steps. One of the respective materials of the base 18 and the protective coating 17 has a higher refractive index and a greater Abbe number than the other material. And the second group of diffraction steps is not covered with the protective coating 17.

摘要翻译： 衍射透镜11，其包括：透镜基部18，其具有带有第一和第二组衍射光栅部分20和21的第二表面13; 以及设置在第一组衍射光栅部分20上的保护涂层17.第一组衍射光栅部分20具有第一组衍射级，第二组衍射光栅部分21具有第二组衍射级 ，其高度比第一组衍射级高。 基部18和保护涂层17的各个材料之一具有比其他材料更高的折射率和更大的阿贝数。 第二组衍射步骤未被保护涂层17覆盖。

公开(公告)号：US08284388B2

公开(公告)日：2012-10-09

申请号：US13308097

申请日：2011-11-30

申请人： Takamasa Ando ,  Tsuguhiro Korenaga

发明人： Takamasa Ando ,  Tsuguhiro Korenaga

IPC分类号： G01B9/00

CPC分类号： G01M11/0228 ,  G02B5/189

摘要： A measurement method and an evaluating apparatus are provided which accurately evaluate the light amount of a spot beam, the diffraction efficiency, and the intensity distribution in the optical axis direction by detecting even a weak diffracted beam in an arbitrary wavelength range converged by a diffraction optical element as an imaging lens. Light emitted from a white light source passes through a wavelength band-pass filter and is diaphragmed by a pinhole slit. The resultant light is paralleled by a collimator lens and enters a diffraction optical element as an imaging lens. The light getting out from the diffraction optical element is converged to be a spot beam, is magnified by a microscope 18, and is then projected on a CCD. A distance changing member changes the distance between the CCD and the diffraction optical element, and then, the intensity distribution in the optical axis direction is measured.

摘要翻译： 提供一种测量方法和评估装置，通过检测由衍射光学会聚的任意波长范围内的弱衍射光束，可以精确地评估光束的光量，衍射效率和光轴方向的强度分布 元素作为成像透镜。 从白色光源发射的光通过波长带通滤光器，并被针孔狭缝隔开。 所得到的光由准直透镜并联，并且作为成像透镜进入衍射光学元件。 从衍射光学元件出射的光会聚成点光束，用显微镜18放大，然后投射到CCD上。 距离改变构件改变CCD与衍射光学元件之间的距离，然后测量光轴方向上的强度分布。

公开(公告)号：US20100110547A1

公开(公告)日：2010-05-06

申请号：US12524040

申请日：2008-01-21

申请人： Takamasa Ando ,  Tsuguhiro Korenaga

发明人： Takamasa Ando ,  Tsuguhiro Korenaga

IPC分类号： G02B27/44 ,  G02B13/18

CPC分类号： G02B5/1895 ,  G02B27/0037 ,  G02B27/4211 ,  G02B27/4216

摘要： In a refraction lens having an aspheric shape formed thereon and having a positive power, a diffraction grating is formed on at least one of the faces of the refraction lens. In order to reduce the curvature of field and the chromatic aberration in a well-balanced manner, the zonal pitch of the diffraction grating is constituted so as to satisfy the following conditional expression. [ eq .  19 ] 0.21   m 2  v d  λ  f h max

摘要翻译： 在其上形成有正功率的非球面形状的折射透镜中，在折射透镜的至少一个面上形成衍射光栅。 为了以良好平衡的方式减小曲率和色差，衍射光栅的纬向间距构成为满足以下条件表达式。 [eq。 （19）这里，Λmin是最小区域间距12; m是衍射的顺序; ＆ngr; d是相对于d线的透镜基板材料的阿贝数; λ是波长; f是有效的焦距; 并且hmax是形成衍射光栅的面的有效半径13。

公开(公告)号：US20090180186A1

公开(公告)日：2009-07-16

申请号：US12295525

申请日：2007-04-05

申请人： Takamasa Ando ,  Tsuguhiro Korenaga ,  Masa-aki Suzuki ,  Yuka Okada

发明人： Takamasa Ando ,  Tsuguhiro Korenaga ,  Masa-aki Suzuki ,  Yuka Okada

IPC分类号： G02B5/18 ,  G02B1/00 ,  B05D5/06

CPC分类号： G02B1/14 ,  B29C39/025 ,  B29C39/026 ,  B29L2011/00 ,  G02B1/105 ,  G02B1/111 ,  G02B5/18 ,  G02B5/1847

摘要： A diffractive optical element that can maintain transparency and be molded easily, and a method for manufacturing the same are provided.A diffractive optical element (10) includes a substrate (11), a protective film (13a, 13b), and a diffraction grating (12a, 12b) disposed between the substrate (11) and the protective film (13a, 13b), wherein the diffraction grating (12a, 12b) is formed of a composite material containing a resin and inorganic particles, a volume ratio of the inorganic particles with respect to the composite material is equal to or smaller than 50% by volume, and the diffraction grating (12a, 12b) has a thickness of equal to or smaller than 20 μm. Since the diffractive optical element (10) uses the composite material containing the resin and the inorganic particles as a material for the diffraction grating (12a, 12b), which is relatively difficult to process, the moldability improves compared with the conventional case of using glass, etc.

摘要翻译： 可以容易地保持透明性和模制性的衍射光学元件及其制造方法。 衍射光学元件（10）包括基板（11），保护膜（13a，13b）和设置在基板（11）和保护膜（13a，13b）之间的衍射光栅（12a，12b），其中 衍射光栅（12a，12b）由包含树脂和无机颗粒的复合材料形成，无机颗粒相对于复合材料的体积比等于或小于50体积％，衍射光栅 12a，12b）具有等于或小于20μm的厚度。 由于衍射光学元件（10）使用包含树脂和无机颗粒的复合材料作为相对难以处理的衍射光栅（12a，12b）的材料，与使用玻璃的常规情况相比，成型性提高 等等

公开(公告)号：US08390799B2

公开(公告)日：2013-03-05

申请号：US13308080

申请日：2011-11-30

申请人： Takamasa Ando ,  Tsuguhiro Korenaga

发明人： Takamasa Ando ,  Tsuguhiro Korenaga

IPC分类号： G01B9/00

CPC分类号： G01M11/0228 ,  G02B5/189

摘要： A measurement method and an evaluating apparatus are provided which are capable of easily and accurately evaluating the light amount of a spot beam, the diffraction efficiency, and the intensity distribution in the optical axis direction by detecting even a weak diffracted beam in an arbitrary wavelength range converged by a diffraction optical element as an imaging lens.

摘要翻译： 提供一种测量方法和评估装置，其能够通过检测偶数的任意波长范围内的弱衍射光束来容易且准确地评估光束的光量，衍射效率和光轴方向上的强度分布 由衍射光学元件会聚为成像透镜。

公开(公告)号：US20120075704A1

公开(公告)日：2012-03-29

申请号：US13376369

申请日：2010-06-04

申请人： Takamasa Ando ,  Tsuguhiro Korenaga

发明人： Takamasa Ando ,  Tsuguhiro Korenaga

IPC分类号： G02B5/18

CPC分类号： G02B5/1814 ,  G02B13/146 ,  G02B27/0018

摘要： An imaging optical system according to the present invention includes a lens that has first and second surfaces and that has a diffraction grating on only one of the first and second surfaces. If the diameter of an effective area, which is defined by a light ray that has entered the lens with a maximum angle of view, is D when measured on the surface with the diffraction grating, an F number of the imaging optical system at the maximum angle of view is Fno, a d-line Abbe number of the lens is νd, and an F number of an axial bundle of rays is F, then the average diffracting ring zone pitch of the effective area satisfies 0.008 ≤ Λ D × Fno ≤ 0.00031 · vd · F

摘要翻译： 根据本发明的成像光学系统包括具有第一表面和第二表面并且仅在第一表面和第二表面中的一个上具有衍射光栅的透镜。 如果在具有衍射光栅的表面上测量由进入具有最大视角的透镜的光线限定的有效面积的直径为D，则成像光学系统的F数最大 视角为Fno，透镜的d线数为阿贝数，光轴的F数为F，则有效面积的平均衍射环带间距为0.008≤ΛD× Fno≤0.00031·vd·F