MANUFACTURE OF RAINBOW HOLOGRAM

摘要

PURPOSE: To manufacture a rainbow hologram shortening the manufacturing time and having good image quality in S-N ratio by recording multiple basic cells with a specific size in the continuous direction on a photosensitive material based on the data of an image observed at the time of reproduction. CONSTITUTION: Interference fringes are regularly aligned at the interval of about 1μm in the slender elliptic interference fringe patterns of the rainbow hologram pattern observed at the time of reproduction, and blocks of the interference fringe patterns are aligned while the phases of the interference fringes are changed. The interference fringe pattern has the size of the vertical length of about 100μm (in the aligning direction of the interference fringes) and the horizontal width of about 1μm (in the direction crossing the aligning direction of the interference fringes), and the interval between the interference fringes is about 0.7μm. For the drawing with the optical blocks, the interference fringe pattern is used as a basic unit (basic cell), and the interference fringe patterns of a certain size are concurrently drawn on a photosensitive material in the aligning direction of the interference fringes.