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    • 3. 发明授权
    • Hologram fabrication process, and hologram fabricated by that process
    • 全息图制作工艺和通过该工艺制造的全息图
    • US08743443B2
    • 2014-06-03
    • US12513462
    • 2007-11-12
    • Tomoko KumasawaMakio KurashigeMitsuru KitamuraMasachika Watanabe
    • Tomoko KumasawaMakio KurashigeMitsuru KitamuraMasachika Watanabe
    • G03H1/28
    • G03H1/28B42D25/328G03H1/0011G03H1/08G03H1/202G03H2001/0413G03H2001/0415
    • The invention provides a hologram fabrication process, characterized by comprising steps of fabricating a computer-generated hologram (CGH) having amplitude information and phase information recorded by computer operation on a given recording surface, irradiating the computer-generated hologram (CGH) with the first reconstructing illumination light (2) to generate the first diffracted light (3) from the computer-generated hologram (CGH) thereby reconstructing a first reconstruction image (O′), simultaneously entering the first diffracted light (3) and the first reference light (4) in a first-stage hologram recording material (11) faced away from the first reconstructed image to record a first-stage hologram (11) in it, irradiating the recorded first-stage hologram (11) with the second reconstructing illumination light (5) to generate the second diffracted light (6) from the first-stage hologram (11) thereby reconstructing the second reconstruction image (O″), and simultaneously entering the second diffracted light (6) and the second reference light (7) in a second-stage hologram recording material (21) located near the second reconstructed image (O″) to record the second-stage hologram (21) in it as a reflection or transmission type volume hologram.
    • 本发明提供了一种全息图制作工艺,其特征在于包括以下步骤:通过计算机操作在给定的记录表面上制造具有振幅信息和相位信息的计算机生成的全息图(CGH),用计算机生成的全息图(CGH) 重建照明光(2)以从计算机生成的全息图(CGH)产生第一衍射光(3),从而重建第一重建图像(O'),同时进入第一衍射光(3)和第一参考光( 4)在面向第一重构图像的第一级全息图记录材料(11)中记录第一级全息图(11),用第二重建照明光(11)照射记录的第一级全息图(11) 5)从第一级全息图(11)产生第二衍射光(6),从而重建第二重构图像(O“),同时进入 在位于第二重建图像(O“)附近的第二级全息图记录材料(21)中将第二衍射光(6)和第二参考光(7)记录在其中以将第二级全息图(21)记录在其中作为 反射或透射型体积全息图。
    • 8. 发明授权
    • Optical element
    • 光学元件
    • US07492500B2
    • 2009-02-17
    • US11799073
    • 2007-04-30
    • Mitsuru Kitamura
    • Mitsuru Kitamura
    • G02B26/00
    • G03H1/0891G03H1/0244G03H1/08G03H2001/0858G03H2210/30G03H2210/454G03H2223/12G03H2240/13G03H2240/23
    • A complex amplitude type spatial optical modulation element, with which the amount of generation of 0th order diffraction light is low. An optical element is arranged by aligning a plurality of three dimensional cells C1(x, y) two dimensionally on an XY plane. Each individual cell is made of a light transmitting material and has a specific amplitude and a specific phase defined therein. The individual cell has a specific optical characteristic such that when predetermined incident light is provided from the upper surface or a lower surface of the cell, transmission emitted light, with which amplitude and phase of the incident light have been changed in accordance with the specific amplitude and the specific phase defined in the cell, is obtained from the lower surface or the upper surface of the cell.
    • 复数幅度型空间光调制元件,其0级衍射光的产生量低。 通过在XY平面上二维对准多个三维单元C1(x,y)来配置光学元件。 每个单个电池由透光材料制成,并且具有限定在其中的特定的振幅和特定相。 单个电池具有特定的光学特性,使得当从电池的上表面或下表面提供预定的入射光时,透射发射光根据特定振幅改变入射光的振幅和相位 并且从电池的下表面或上表面获得电池中限定的特定相。
    • 9. 发明申请
    • Computer Hologram and Creation Method Thereof
    • 电脑全息图及其创作方法
    • US20080225359A1
    • 2008-09-18
    • US10586705
    • 2005-01-25
    • Mitsuru Kitamura
    • Mitsuru Kitamura
    • G03H1/08
    • G03H1/0841G03H1/08G03H2240/13G03H2240/41
    • An original image (10), a recording surface (20), and a reference light (R) are defined and a large number of calculation points (Q(x, y)) are defined at a predetermined pitch on the recording surface (20). For each of the calculation points, intensity of interference wave, formed by an object light (O1 to ON) generated from the respective parts (P1 to PN) of the original image (10) and a reference light (R), is calculated. A binary pattern defined by dividing a unit area into a first area having a pixel value “white” and a second area having a pixel value “black” is defined in a plurality of ways by changing the occupancy ratio (0 to 100%) of the first area. A binary pattern having the occupancy ratio corresponding to the interference wave intensity calculated, is assigned to the position of the respective calculation points (Q) on the recording surface (20) so as to form a binary image and create a computer hologram medium having convex and concave portions. By setting the vertical and horizontal pitched of the calculation points (Q) to 400 nm or below, it is possible to reduce the unnecessary noise component generated during observation and obtain a clear reproduction area.
    • 定义原始图像(10),记录表面(20)和参考光(R),并且在记录表面(20(20))上以预定间距限定大量计算点(Q(x,y) )。 对于每个计算点,由原始图像(10)的各个部分(P 1至PN)和参考光(R)产生的由对象光(O 1至ON)形成的干涉波的强度为 计算。 通过将多个单位区域的占有率(0〜100%)变更为多个,通过将单位区域划分为具有像素值“白色”的第一区域和具有像素值“黑色”的第二区域而定义的二进制图案 第一个区域。 具有与计算出的干涉波强度对应的占有率的二进制图案被分配给记录表面(20)上的各个计算点(Q)的位置,以便形成二进制图像并创建具有凸起的计算机全息图介质 和凹部。 通过将计算点(Q)的垂直和水平倾斜度设定为400nm以下,可以减少观察时产生的不必要的噪声成分,获得清晰的再现区域。
    • 10. 发明申请
    • Diffractive Optical Element And Optical Low-Pass Filter Utilizing The Same
    • 衍射光学元件和光学低通滤波器
    • US20080037126A1
    • 2008-02-14
    • US11629857
    • 2005-06-16
    • Mitsuru KitamuraAkiko Tanaka
    • Mitsuru KitamuraAkiko Tanaka
    • G02B5/18
    • G02B27/46G02B5/1866
    • The invention provides a diffractive optical element that can be used as a light beam splitter device, an optical low-pass filter or the like having a two-dimensionally multi-valued fine periodic structure. The surface of a transparent substrate for the diffractive optical element is divided into fine rectangular areas of identical shape which line up in two orthogonal directions while a plurality of rows line up with ends in alignment in any one of the directions. With respect to standard wavelength light incident vertically on the surface of the transparent substrate, an l-th, and a (l+1)-th rectangular area in an l-th row, where l is an odd number, gives a phase 2pπ, and a phase {(4q+1)π/2+δπ/2}, respectively, and an l-th, and a (l+1)-th rectangular area in a (l+1)-th row gives a phase {(4r+3)π/2+3δπ/2}, and a phase {(4s+2)π/2+δπ}, respectively. However, −0.25≦δ≦0.25, and p, q, r, and s is an integer.
    • 本发明提供一种衍射光学元件,其可以用作具有二维多值微周期结构的光束分离器件,光学低通滤波器等。 用于衍射光学元件的透明基板的表面被划分为在两个正交方向上排列的相同形状的精细矩形区域,而多个行在任一方向上对齐排列。 对于在透明基板的表面上垂直入射的标准波长光,第l行中的第l和第(1 + 1)个矩形区域,其中l是奇数,给出相位2ppi ,并且第(1 + 1)行中的相位{(4q + 1)pi / 2 + deltapi / 2}和第(l + 1)个第一矩形区域给出 相{(4r + 3)pi / 2 + 3deltapi / 2}和相{(4s + 2)pi / 2 + deltapi}。 然而,-0.25 <= delta <= 0.25,p,q,r和s是整数。