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123 条记录 (耗时 0.014 秒)

    Short-exposure tomosynthesis apparatus for the formation of layer images with a low artefact-content
    91.
    发明授权
    Short-exposure tomosynthesis apparatus for the formation of layer images with a low artefact-content 失效
    用于形成具有低人工制品含量的层图像的短曝光层析合成装置

    公开(公告)号：US4469440A

    公开(公告)日：1984-09-04

    申请号：US330636

    申请日：1981-12-14

    申请人： William J. Dallas

    发明人： William J. Dallas

    IPC分类号： A61B6/02 ,  G03H1/06 ,  G06K9/58

    CPC分类号： A61B6/025 ,  G03H1/06

    摘要： An apparatus for generating images of layers of an object from perspective images recorded from different positions by an array of radiation sources. The apparatus comprises an illumination device, for transilluminating the perspective images, and an imaging matrix comprising imaging elements. An optical system axis extends perpendicularly through the center of the matrix. The matrix superimposes the perspective images on a light-sensitive detector surface. In the apparatus, an optical deflection element is arranged in front of or behind each imaging element. The deflection element blurs the perspective image along a pattern which exhibits a major direction. The relevant deflection element is so arranged that the major direction extends at least substantially perpendicularly to a straight line connecting the optical system axis to the center of the imaging element within the matrix plane. All deflection elements are arranged in such a way relative to each other that the major directions subtend substantially equal angles with each other.

    摘要翻译： 一种用于通过辐射源阵列从不同位置记录的透视图生成物体层的图像的装置。 该装置包括用于透视透视图像的照明装置和包括成像元件的成像矩阵。 光学系统轴垂直延伸穿过矩阵的中心。 矩阵将透视图叠加在感光检测器表面上。 在该装置中，光学偏转元件布置在每个成像元件的前面或后面。 偏转元件沿着显示主要方向的图案模糊透视图。 相关的偏转元件被布置成使得主方向至少基本上垂直于连接光学系统轴线到矩阵平面内的成像元件的中心的直线延伸。 所有偏转元件以相对于彼此的方式布置，使得主方向相互大致相等的角度。

    System for synthesizing strip-multiplexed holograms
    92.
    发明授权
    System for synthesizing strip-multiplexed holograms 失效

    公开(公告)号：US4206965A

    公开(公告)日：1980-06-10

    申请号：US716463

    申请日：1976-08-23

    申请人： Stephen P. McGrew

    发明人： Stephen P. McGrew

    IPC分类号： G02B13/08 ,  G02B27/22 ,  G03H1/04 ,  G03H1/06 ,  G03H1/24 ,  G03H1/26 ,  G03H1/30 ,  G02B27/00

    CPC分类号： G03H1/0406 ,  G03H1/06 ,  G03H1/24 ,  G03H1/26 ,  G03H1/0486 ,  G03H1/0891 ,  G03H2001/2685 ,  G03H2001/2695

    摘要： A system for synthesizing strip-multiplexed holograms, with or without coherent light, from a plurality of two-dimensional images. The two-dimensional images may be formed by a motion picture film of a rotating subject such that each image is a view of the subject from a different angle. The images are then non-diffusely and anamorphically projected by a lens system which compresses the image in a first direction and expands the image in a second direction orthogonal to the first direction. The projected image or object beam is then superimposed on the reference beam by a lens-beamsplitter which transforms the substantially planar object beam into a substantially cylindrical wavefront and projects it and the reference beam onto a holographic recording medium. As each two-dimensional image is sequentially projected, the holographic recording medium is shifted so that a plurality of laterally displaced strips are recorded. Alternate embodiments of the system utilize a holographic diffraction grating contact printed by means of the object beam onto the holographic recording medium instead of a reference beam to produce an interference pattern, a video projection system instead of a cinema film projection system, a three-color image of coherent or nondiffuse light instead of a monochromatic image, and/or three separate holographic diffraction gratings produced by three different monochromatic sources of coherent light instead of a single holographic diffraction grating in order to produce multicolor holograms, or a reference beam or reflective surface relief diffraction grating or Fresnel mirror behind the holographic recording medium for synthesis of reflection holograms instead of transmission holograms. The system is capable of synthesizing image plane holograms by using a variety of disclosed processes. Techniques are also disclosed for synthesizing holograms which can be displayed flat and illuminated with a point light source without introducing image distortion.

    Image coding and decoding using coherent codes
    93.
    发明授权
    Image coding and decoding using coherent codes 失效
    使用相干码的图像编码和解码

    公开(公告)号：US4118099A

    公开(公告)日：1978-10-03

    申请号：US711712

    申请日：1976-08-05

    申请人： Hermann Weiss ,  Erhard Klotz ,  Ulf Tiemens

    发明人： Hermann Weiss ,  Erhard Klotz ,  Ulf Tiemens

    IPC分类号： G01N23/04 ,  A61B6/00 ,  A61B6/02 ,  G02B27/22 ,  G03B42/02 ,  G03H1/00 ,  G03H1/06 ,  H01F10/14 ,  G02B27/00

    CPC分类号： A61B6/025 ,  G03H1/06 ,  H01F10/147

    摘要： A method of imaging a three-dimensional object with the aid of coding and decoding using coherent point codes, whereby the object is recorded in two steps, each with a plurality of radiation sources of different orientation on the same recording material.Negatives of the two images are produced, after which the positive of one image is combined with the negative of the other image, the combined images being subsequently multiplied by means of point holograms formed with the aid of a reference wave and a multiplicity of light sources whose co-ordinates correspond to those of the point images of the two source arrays recorded by a pinhole camera, the two multiplied images being superposed in one plane, the coded images being decoded by changing their scale with the aid of two synchronously controlled zoom lenses whereby the coordinates of the point image function of an image of an object layer in the coded images are adapted to the points stored in the two point holograms.

    摘要翻译： 借助于使用相干点代码的编码和解码来对三维物体进行成像的方法，由此物体被记录在两个步骤中，每个具有在相同记录材料上具有不同取向的多个辐射源。

    Holography using light of limited coherence
    94.
    发明授权
    Holography using light of limited coherence 失效
    使用有限合并光的全景照片

    公开(公告)号：US3832026A

    公开(公告)日：1974-08-27

    申请号：US25225372

    申请日：1972-05-11

    申请人： BBC BROWN BOVERI & CIE

    发明人： MOTTIER F

    IPC分类号： G03H1/06 ,  G02B27/00

    CPC分类号： G03H1/06 ,  Y10S359/90

    摘要： A method is disclosed for forming good quality holograms using light of only limited coherence. According to the method, a hologram plate is illuminated by a reference laser beam and by laser light scattered from an object of which a hologram is to be formed. Local intensity fluctuations having maxima and minima are formed at the object for each frequency of light in the laser beam. Good holograms are formed provided that the intensity maxima belonging to one frequency of the laser light do not predominantly coincide with the intensity maxima of any other frequency of the laser light.

    摘要翻译： 公开了一种使用仅具有有限相干性的光形成高质量全息图的方法。 根据该方法，全息图板被参考激光束照射，并且从要形成全息图的物体散射的激光照射。 在激光束的每个频率频率的物体处形成具有最大值和最小值的局部强度波动。 形成良好的全息图，只要属于激光的一个频率的强度最大值不主要与激光的任何其它频率的强度最大值一致。

    DEVICE AND METHOD FOR CALIBRATION-FREE PHASE SHIFTING PROCEDURE FOR SELF-INTERFERENCE HOLOGRAPHY
    97.
    发明申请
    DEVICE AND METHOD FOR CALIBRATION-FREE PHASE SHIFTING PROCEDURE FOR SELF-INTERFERENCE HOLOGRAPHY 有权

    公开(公告)号：US20220163918A1

    公开(公告)日：2022-05-26

    申请号：US17543240

    申请日：2021-12-06

    申请人： CellOptic, Inc.

    发明人： Gary BROOKER ,  Nisan Siegel

    IPC分类号： G03H1/04 ,  G03H1/06 ,  G03H1/00

    摘要： An apparatus and method are introduced to produce a hologram of an object from electromagnetic radiation, such as incoherent light, received from the object. The electromagnetic radiation is received by a receiving assembly and transformed into a plurality of co-linear co-propagating beams with different focal distances. The interference of the plurality of beams is enabled by projecting components of each beam along a common polarization direction. The interference patterns thus formed are recorded and then processed to form the hologram of the object.