METHOD OF PHOTOGRAPHING TRANSMISSION TYPE HOLOGRAM MASTER PLATE

摘要

PROBLEM TO BE SOLVED: To manufacture a large-size transmission type hologram master plate which is usually difficult to photograph by a usual two-beam interference method, using a simple arrangement. SOLUTION: Light is made to enter from the top face side of a hologram photosensitive material, so that first interference fringes are recorded by the interference between the light 12 transmitted through the photosensitive material 1 and reflected by a half mirror 2 to reenter the photosensitive material 1 and the light 11 which directly enters the photosensitive material 1; second interference fringes are recorded at the same time by the interference between the light 13 transmitted through the photosensitive material 1 and the half mirror 2 and reflected by a reflection plane 4 to reenter the photosensitive material 1 and the light 11 which directly enters the photosensitive material 1; and third interference fringes are recorded at the same time by the interference between the light 12 transmitted through the photosensitive material 1 and reflected by the half mirror 2 to reenter the photosensitive material 1 and the light 13 transmitted through the half mirror 2 and reflected by the reflection plane 4 to enter the photosensitive material 1.