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    • 2. 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。
    • 3. 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。
    • 4. 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。
    • 8. 发明授权
    • Hologram information forming method
    • 全息信息形成方法
    • US5400155A
    • 1995-03-21
    • US134825
    • 1993-10-12
    • Akihiko UedaHirokuni MonzenHirokazu AritakeMasayuki KatoMasato Nakashima
    • Akihiko UedaHirokuni MonzenHirokazu AritakeMasayuki KatoMasato Nakashima
    • G03H1/08G03H1/26
    • G03H1/08G03H1/2294G03H2001/0423G03H2001/085G03H2210/36G03H2210/452G03H2210/454G03H2225/32G03H2240/62
    • A hologram surface to express a phase distribution, a visual field in which a solid image can be seen; and a stereoscopic display limit are set in a virtual space. A target to be stereoscopically displayed is subsequently expressed in the virtual space by a set of micro polygons. A plurality of slice planes which are parallel with the horizontal plane are set into the virtual space including the target. The line segments which intersect the polygons are obtained for every slice plane. The detected line segment is divided or clipped as necessary and is finally divided into the portion which can be always seen from the whole region of the visual field and a portion which is obstructed by another line segment and can be seen from only a part of the visual field, thereby extracting the line segment. In the calculation of a phase distribution, sampling points are set onto the extracted line segment, a 1-dimensional hologram phase distribution on the hologram surface is calculated for every sampling point, and the calculated 1-dimensional hologram phase distributions are added to every slice plane.
    • 表示相位分布的全息图表面,可以看到实心图像的视野; 并且在虚拟空间中设置立体显示限制。 立体显示的目标随后通过一组微多边形在虚拟空间中表示。 将与水平面平行的多个切片平面设置在包含目标的虚拟空间中。 对于每个切片平面获得与多边形相交的线段。 检测到的线段根据需要被划分或剪辑,并且最终被划分为从视野的整个区域总是可以看到的部分和被另一个线段阻挡的部分,并且可以仅从 视野,从而提取线段。 在相位分布的计算中,将采样点设置在提取的线段上,针对每个采样点计算全息图表面上的一维全息图相位分布,并将计算出的一维全息图相位分布添加到每个切片 飞机