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    Computer-generated hologram and its fabrication process
    2.
    发明公开
    Computer-generated hologram and its fabrication process 有权
    合成Hologramm undzugehörigesHerstellungsverfahren

    公开(公告)号：EP1484651A1

    公开(公告)日：2004-12-08

    申请号：EP02028430.3

    申请日：2002-12-18

    申请人： DAI NIPPON PRINTING CO., LTD.

    发明人： Kitamura, Mitsuru

    IPC分类号： G03H1/08 ,  G03H1/26

    CPC分类号： G03H1/0841 ,  G03H1/028 ,  G03H1/0808 ,  G03H2001/0478 ,  G03H2001/085 ,  G03H2001/2242 ,  G03H2210/30 ,  G03H2210/32 ,  G03H2210/33 ,  G03H2210/36 ,  G03H2210/441 ,  G03H2210/452 ,  G03H2210/55 ,  G03H2210/56 ,  G03H2240/41 ,  G03H2240/62

    摘要： The invention relates to a computer-generated hologram fabrication process that enables a plurality of original images to be observed with master-slave relations. Original images 11, 12, a recording surface 20 and reference light R are defined on a computer, and a number of point light sources P11-1, ..., P12-1, ... as samples are defined on each original image. Given angles of spreading of object light beams emitted from individual point light sources are defined, and areas on the recording surface 20, at which object light beams emitted from point light sources defined on each original image 11, 12 with the thus limited given angles of spreading arrive, are determined as recording areas α11 and α12 corresponding to the original images 11 and 12. When there is an overlapping (hatched) portion in the recording areas, the overlapping portion is determined as a recording area corresponding to the master original image. Within the area α11 there is recorded only information about the original image 11, and within the area α12 there is recorded only information about the original image 12. Upon reconstruction, the boundary portion of the master original image is enhanced.

    摘要翻译： 本发明涉及计算机生成的全息图制作过程，其使得能够以主从关系来观察多个原始图像。 在计算机上定义原始图像11,12，记录表面20和参考光R，并且在每个原始图像上定义多个点光源P11-1，...，P12-1，...作为样本 。 定义了从各个点光源发射的物体光束的扩展角度，以及记录表面20上的区域，在该区域处，由在每个原始图像11,12上限定的点光源发射的物体， 被确定为对应于原始图像11和12的记录区域α11和α12。当记录区域中存在重叠（阴影）部分时，重叠部分被确定为对应于主原件的记录区域 图片。 在区域α11内仅记录关于原始图像11的信息，并且在区域α12内仅记录关于原始图像12的信息。在重建时，主原始图像的边界部分被增强。

    METHOD FOR MODIFYING SPATIAL RESOLUTION IN THE RECONSTRUCTION OF IMAGES IN DIGITAL HOLOGRAPHY
    7.
    发明授权
    METHOD FOR MODIFYING SPATIAL RESOLUTION IN THE RECONSTRUCTION OF IMAGES IN DIGITAL HOLOGRAPHY 有权
    法的空间分辨率中的影像数字HOLOGRAPHIE重建改性

    公开(公告)号：EP1654596B1

    公开(公告)日：2012-03-28

    申请号：EP04745205.7

    申请日：2004-07-09

    申请人： CONSIGLIO NAZIONALE DELLE RICERCHE

    发明人： COPPOLA, Giuseppe ,  DE NICOLA, Sergio ,  FERRARO, Pietro ,  FINIZIO, Andrea ,  PIERATTINI, Giovanni

    IPC分类号： G03H1/08

    CPC分类号： G03H1/0841 ,  G03H1/0443 ,  G03H1/0866 ,  G03H2240/62

    摘要： The invention concerns a method for the reconstruction of holographic images in digital holography, the holographic images being detected and transformed in a digitized hologram by an image detection device, the digitized hologram being made of an array having a number Vr of elementary pixels, the sizes of which being equal to the sampling intervals of the image detection device, the method comprising a first step of processing the digitized hologram array (e.g. zero-order elimination, aberration correction), and a second step of digitally reconstructing the complex object in an observation plane starting from the digitized hologram processed in the first step, the method being characterised in that the second step is carried out through discrete Fresnel Transform applied on an array of Ve pixels having sizes equal to that of said elementary pixels, wherein said array of Ve pixels (50, 51) includes said Vr pixels (51) and an interger number p=Ve-Vr>0 constant values (50). The invention further concerns the instruments necessary to the execution of the method and the apparatus executing it.

    HOLOGRAPHISCHE REKONSTRUKTIONSEINRICHTUNG
    8.
    发明公开
    HOLOGRAPHISCHE REKONSTRUKTIONSEINRICHTUNG 有权
    全息重建装置

    公开(公告)号：EP2181361A2

    公开(公告)日：2010-05-05

    申请号：EP08786426.0

    申请日：2008-07-25

    申请人： SeeReal Technologies S.A.

    发明人： LEISTER, Norbert

    IPC分类号： G03H1/22 ,  G03H1/32

    CPC分类号： G03H1/32 ,  G03H1/0808 ,  G03H1/2249 ,  G03H1/2294 ,  G03H2001/2242 ,  G03H2001/2263 ,  G03H2001/2271 ,  G03H2210/452 ,  G03H2210/454 ,  G03H2226/05 ,  G03H2240/62

    摘要： A reduction in speckle patterns in the reconstruction of a 3D scene can be achieved by way of averaging. In a holographic reconstruction device, speckle patterns are intended to be suppressed while taking account of the visible resolution of the reconstruction of the scene. The holographic reconstruction device is designed such that the visible resolution of the reconstruction of the scene is matched to the resolution capability of the human eye, to the imaging properties of the reconstruction means (RM) used or to the resolution capability of the light modulation means (SLM) used. Method steps are carried out, in which a grid scale for the object points (OP) is generated by way of system control means (SM) in each case in a plane of intersection (SE), which grid scale cannot be used to separately resolve adjacent object points (OP) in the plane of intersection (SE), and the compilation of object points (OP) of the respective plane of intersection (SE) to form an object point group with adjacent object points (OP) which can be separately resolved is carried out. In holographic displays, the invention is used to reduce speckle patterns and reduce the number of the holograms of object points of the scene, which are to be calculated and coded, and the calculation complexity.