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    • 1. 发明授权
    • Optical scanner using planar reflection holograms
    • 光学扫描仪采用平面反射全息图
    • US5245170A
    • 1993-09-14
    • US978509
    • 1992-11-18
    • Hirokazu AritakeToshiyuki IchikawaKozo YamazakiFumio YamagishiHiroyuki Ikeda
    • Hirokazu AritakeToshiyuki IchikawaKozo YamazakiFumio YamagishiHiroyuki Ikeda
    • G06K7/10
    • G06K7/10871G06K7/10663G06K7/10693
    • An optical scanner suitable for use with a bar code reader includes a light source for generating a laser beam, a laser beam scanning device, a scanning pattern generating optical system, and a signal light condensing optical system for deflecting scattered signal light scattered by an object to be read to introduce the light to a photo-detector. The scanning pattern generating optical system or signal light condensing optical system includes strips of planar reflective holograms disposed substantially in parallel with each other in one plane to produce a reflection beam having an angle of reflection which is different from an angle of incidence of the laser beam thereon. Another embodiment discloses a condenser integrated with one of plane mirrors for deflecting the scan beam to form a hologram module of the reflection type. The scanner is a miniaturized apparatus as a result of the reflection holograms.
    • 适用于条形码读取器的光学扫描器包括用于产生激光束的光源,激光束扫描装置,扫描图形生成光学系统和用于偏转由物体散射的散射信号光的信号聚光光学系统 被读取以将光引入光电检测器。 扫描图形生成光学系统或信号聚光光学系统包括在一个平面中基本上彼此平行设置的平面反射全息图条,以产生具有不同于激光束的入射角的反射角的反射光束 上。 另一实施例公开了一种与平面镜之一集成的电容器,用于偏转扫描光束以形成反射型全息图模块。 扫描仪是作为反射全息图的结果的小型化装置。
    • 6. 发明授权
    • Method of manufacturing light beam scanning apparatus and fixed hologram
plate and rotatable hologram and light distributing apparatus
    • 制造光束扫描装置和固定全息板以及可旋转全息图和光分布装置的方法
    • US5861964A
    • 1999-01-19
    • US453669
    • 1995-05-30
    • Shinya HasegawaShigeo KayashimaSatoshi MaedaShigetake IwataFumio YamagishiMasato NakashimaHirokazu AritakeMamoru Hokari
    • Shinya HasegawaShigeo KayashimaSatoshi MaedaShigetake IwataFumio YamagishiMasato NakashimaHirokazu AritakeMamoru Hokari
    • G02B5/32G02B26/10G03H1/12G02B5/18G02B26/08
    • G02B5/32G02B26/106G03H1/0005
    • A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems, and capable of compensating for disadvantages. The light-beam scanning apparatus including diffraction gratings for minimizing either: a sum total of values obtained by weighting a square of an optical path length difference between an optical path of a light flux measured along a principal axis of a light beam incident on and diffracted by a first diffraction grating of a rotatable hologram, and incident on and diffracted by a second diffraction grating of a fixed plate to conduct a scanning and converging on a scanning point on an image formation surface, and an optical path of a light flux measured along a marginal ray distanced from the principal axis or an absolute value of the optical path difference thereof; or a sum total of values obtained by weighting a square of a sum obtained by adding an amount of displacement of a light-beam convergent on a scanning point on the image formation surface, to an amount of displacement of the same light. The displacement measured with respect to the principal axis of a phase recorded on the diffraction grating when the light flux is incident on the fixed plate or by weighting an absolute value of the sum. The weighting is conducted at every scanning position of an image formation surface.
    • 高分辨率的光束扫描装置仅利用大量生产的全息图而不是利用辅助光学系统,并且能够补偿缺点。 所述光束扫描装置包括用于最小化以下的衍射光栅:通过对沿着入射和衍射的光束的主轴测量的光通量的光路之间的光程长度差的平方加权而获得的值的总和 通过可旋转全息图的第一衍射光栅,入射并由固定板的第二衍射光栅衍射,以对扫描点进行扫描和会聚,并且沿着图像形成表面测量的光通量的光路 与主轴相距的边缘光线或其光程差的绝对值; 或通过将在图像形成表面上的扫描点上收敛的光束的位移量相加而获得的和的平方加权到相同光的位移量而获得的值的总和。 当光束入射到固定板上时,相对于记录在衍射光栅上的相位的主轴测量的位移或通过加权的绝对值。 加权在图像形成表面的每个扫描位置进行。
    • 7. 发明授权
    • Light beam scanning apparatus
    • 光束扫描装置
    • US5978111A
    • 1999-11-02
    • US453668
    • 1995-05-30
    • Shinya HasegawaShigeo KayashimaSatoshi MaedaFumio YamagishiHirokazu Aritake
    • Shinya HasegawaShigeo KayashimaSatoshi MaedaFumio YamagishiHirokazu Aritake
    • G02B5/32G02B26/10G03H1/12G02B5/18
    • G02B5/32G02B26/106G03H1/0005
    • A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems, and capable of compensating for disadvantages. The light-beam scanning apparatus including diffraction gratings for minimizing either: a sum total of values obtained by weighting a square of an optical path length difference between an optical path of a light flux measured along a principal axis of a light beam incident on and diffracted by a first diffraction grating of a rotatable hologram, and incident on and diffracted by a second diffraction grating of a fixed plate to conduct a scanning and converging on a scanning point on an image formation surface, and an optical path of a light flux measured along a marginal ray distanced from the principal axis or an absolute value of the optical path difference thereof; or a sum total of values obtained by weighting a square of a sum obtained by adding an amount of displacement of a light-beam convergent on a scanning point on the image formation surface, to an amount of displacement of the same light. The displacement measured with respect to the principal axis of a phase recorded on the diffraction grating when the light flux is incident on the fixed plate or by weighting an absolute value of the sum. The weighting is conducted at every scanning position of an image formation surface.
    • 高分辨率的光束扫描装置仅利用大量生产的全息图而不是利用辅助光学系统,并且能够补偿缺点。 所述光束扫描装置包括用于最小化以下的衍射光栅:通过对沿着入射和衍射的光束的主轴测量的光通量的光路之间的光程长度差的平方加权而获得的值的总和 通过可旋转全息图的第一衍射光栅,入射并由固定板的第二衍射光栅衍射,以对扫描点进行扫描和会聚,并且沿着图像形成表面测量的光通量的光路 与主轴相距的边缘光线或其光程差的绝对值; 或通过将在图像形成表面上的扫描点上收敛的光束的位移量相加而获得的和的平方加权到相同光的位移量而获得的值的总和。 当光束入射到固定板上时,相对于记录在衍射光栅上的相位的主轴测量的位移或通过加权的绝对值。 加权在图像形成表面的每个扫描位置进行。
    • 8. 发明授权
    • Light beam scanning apparatus
    • 光束扫描装置
    • US5861989A
    • 1999-01-19
    • US838934
    • 1997-04-25
    • Shinya HasegawaShigeo KayashimaSatoshi MaedaShigetake IwataFumio YamagishiMasato NakashimaHirokazu AritakeMamoru Hokari
    • Shinya HasegawaShigeo KayashimaSatoshi MaedaShigetake IwataFumio YamagishiMasato NakashimaHirokazu AritakeMamoru Hokari
    • G02B5/32G02B26/10G03H1/12G02B5/18
    • G02B5/32G02B26/106G03H1/0005
    • A high-resolution light-beam scanning apparatus including a rotatable hologram and a fixed plate which are diffraction gratings for minimizing either a sum total of values obtained by weighting (1): a square of an optical path length difference between a) an optical path of a light flux measured along a principal axis of a light beam incident on and diffracted by a first diffraction grating of the rotatable hologram, and incident on and diffracted by a second diffraction grating of the fixed plate so as to conduct a scanning and converging on an image formation surface scanning point, and b) an optical path of a light flux measured along a marginal ray distanced from the principal axis, or an absolute value of the optical path difference thereof; or (2) a square of a sum obtained by adding an amount of displacement of a light beam convergent on the scanning point, which displacement is measured along the marginal ray distanced from the principal axis of an incident reconstructing light flux with respect to the principal axis of a phase of the first diffraction grating, to an amount of displacement of the same light, which displacement is measured with respect to the principal axis of a phase recorded on the second diffraction grating, when the light flux is incident on the fixed plate, or by weighting an absolute value of the sum, each weighting being conducted at every scanning position covering an entire range of the image formation surface.
    • 一种高分辨率光束扫描装置,包括可旋转的全息图和固定板,它们是衍射光栅,用于最小化通过加权(1)得到的值的总和:光路之间的光程长度差的平方 沿着可旋转全息图的第一衍射光栅入射并衍射的光束的主轴测量的光通量,并入射并由固定板的第二衍射光栅衍射,以便进行扫描和会聚 图像形成表面扫描点,以及b)沿着与主轴相距的边缘光线测量的光通量的光路或其光程差的绝对值; 或者(2)通过将会聚在该扫描点上的光束的位移量相加而得到的和的平方,该位移是沿着相对于主体的入射重建光通量的主轴远离的边缘光线被测量的 第一衍射光栅的相位的轴相对于相对于记录在第二衍射光栅上的相位的主轴测量的相同光的位移量,当光束入射到固定板 或者通过加权和的绝对值,每个加权在覆盖图像形成表面的整个范围的每个扫描位置进行。
    • 9. 发明授权
    • Light beam scanning apparatus comprising a first and second diffraction
grating plate
    • 光束扫描装置,包括第一和第二衍射光栅板
    • US5680253A
    • 1997-10-21
    • US949520
    • 1992-11-25
    • Shinya HasegawaShigeo KayashimaSatoshi MaedaShigetake IwataFumio YamagishiMasato NakashimaHirokazu AritakeMamoru Hokari
    • Shinya HasegawaShigeo KayashimaSatoshi MaedaShigetake IwataFumio YamagishiMasato NakashimaHirokazu AritakeMamoru Hokari
    • G02B5/32G02B26/10G03H1/12G02B5/18
    • G02B5/32G02B26/106G03H1/0005
    • A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems, and capable of compensating for disadvantages. The light-beam scanning apparatus including diffraction gratings for minimizing either: a sum total of values obtained by weighting a square of an optical path length difference between an optical path of a light flux measured along a principle axis of a light beam incident on and diffracted by a first diffraction grating of a rotatable hologram, and incident on and diffracted by a second diffraction grating of a fixed plate to conduct a scanning and converging on a scanning point on an image formation surface, and an optical path of a light flux measured along a marginal ray distanced from the principal axis or an absolute value of the optical path difference thereof; or a sum total of values obtained by weighting a square of a sum obtained by adding an amount of displacement of a light-beam convergent on a scanning point on the image formation surface, to an amount of displacement of the same light. The displacement measured with respect to the principal axis of a phase recorded on the diffraction grating when the light flux is incident on the fixed plate or by weighting an absolute value of the sum. The weighting is conducted at every scanning position of an image formation surface.
    • 高分辨率的光束扫描装置仅利用大量生产的全息图而不是利用辅助光学系统,并且能够补偿缺点。 该光束扫描装置包括用于最小化以下的衍射光栅:通过对沿着入射和衍射的光束的主轴测量的光通量的光路之间的光程长度差的平方加权获得的值的总和 通过可旋转全息图的第一衍射光栅,入射并由固定板的第二衍射光栅衍射,以对扫描点进行扫描和会聚,并且沿着图像形成表面测量的光通量的光路 与主轴相距的边缘光线或其光程差的绝对值; 或通过将在图像形成表面上的扫描点上收敛的光束的位移量相加而获得的和的平方加权到相同光的位移量而获得的值的总和。 当光束入射到固定板上时,相对于记录在衍射光栅上的相位的主轴测量的位移或通过加权的绝对值。 加权在图像形成表面的每个扫描位置进行。