| 摘要 |
A method and device for retrieving information from a matrix of holograms arranged in columns and rows characterized by illuminating the matrix of holograms with a laser illumination and focusing the hologram images on a matrix of photosensitive cells arranged in columns and rows corresponding to the columns and rows of the matrix of holograms, scanning the matrix of photosensitive cells one column at a time and collecting the information transferred to each of the photosensitive cells of the column from its respective hologram. One embodiment of the invention utilizes photoconductive devices for the photosensitive cells of the matrix and an electron beam which is deflected either in a curve path to project on a column with a vertical angle thereto or is deflected twice to insure a vertical angle of incidence on the column. Another embodiment of the invention utilizes a method and apparatus in which the photosensitive cells are photoemissive devices which emit electrons to create an electronic image and includes means for deflecting the image to pass portions from an individual column of the photodevices through a slot onto electron collecting means to obtain the information transferred to the photodevices.
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