Patent ID: 9158281
Filing Date: 2015-10-13
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, on a hologram recording surface; an attribute assigning step of defining a gradation pattern for each of the M original images, respectively, which expresses that an appearance probability of a record attribute corresponding to an original image gradually changes from 1 to 0 including an intermediate value between 1 and 0 in space, and assigning any one of record attributes prohibiting duplicate assignment to each unit region according to appearance probabilities of the respective record attributes at each individual position when the respective gradation patterns are overlapped onto the recording surface; 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 a specific original image corresponding to an assigned record attribute, respectively, to prepare data indicating a predetermined record pattern to be formed on the recording surface; and a medium forming step of forming the record pattern on a physical medium.