METHOD OF PHOTOGRAPHING TRANSMISSION TYPE HOLOGRAM

摘要

PROBLEM TO BE SOLVED: To obtain a transmission type hologram of prescribed characteristics by photographing the transmission type hologram of a volume type which is hardly photographable ordinary double-beam interference in easily photographable configuration and correcting the incident angle and diffraction angle of two beams in duplicating this hologram. SOLUTION: The intermediate transmission type hologram is first photographed in a volume type hologram photosensitive material by the double- beam interference method in the air and thereafter the photographed intermediate transmission type hologram 10' and another volume type hologram photosensitive material 12 are brought into tight contact with each other across a wedge prism 13. Illumination light 3 for reconstruction is made incident at the incident angle corresponding to one beam in photographing the intermediate transmission type hologram on this hologram and the diffracted light 5 produced from the intermediate transmission type hologram 10' and the non-diffracted light 4 are interfered in another volume type hologram photosensitive material 12, by which the desired transmission type hologram of the volume type is photographed.