Patent ID: 8749862
Filing Date: 2014-06-10
Classification: B42D,G03H

Abstract:
1. A hologram recording medium preparing method comprising: an original image preparing step of preparing, as data, a plurality M of original images to be recorded; a unit region defining step of defining and positioning a plurality of unit regions, each having an adequate area for recording interference fringes of visible light and a dimension of each being no more than 300 μm on a hologram recording surface, said plurality of unit regions having a same size and same rectangular shape and arrayed in a form of a two-dimensional matrix; an attribute assigning step of assigning a specific record attribute, which indicates that any one of said plurality M of original images is to be recorded, to each of the plurality of unit regions; a record pattern preparing step of determining, for each individual unit region, an interference fringe pattern, a diffraction grating pattern, or a scattering structure pattern based on an original image corresponding to an assigned record attribute, respectively, to prepare data indicating a predetermined record pattern to be formed on the recording surface so that each of said original images is recorded in a plurality of unit regions, respectively, wherein an interference fringe pattern is to be formed for at least one original image; and a medium forming step of forming the record pattern on a physical medium; wherein an original image for which an interference fringe pattern is to be formed is located at a position away from said hologram recording surface and comprises a plurality of point light sources to be recorded.