Fabrication process of multi-image type hologram, and multi-image type hologram fabricated by that process

摘要

The invention relates to a process by which a multi-image type hologram wherein one 3D image changes over to another depending on a viewing direction can be fabricated in simple construction and a multi-image type hologram fabricated by that process. According to the process for the fabrication of a multi-image type hologram wherein one image changes over to another depending on a viewing direction, the area of a hologram recording material is divided into a plurality of sub-areas 11₁, 11₂ and 11₃. Objects to be displayed on different images are holo-graphically recorded in the respective sub-areas, using reference light having the same angle of incidence, thereby recording the first-stage hologram 11. Object images O₁′, O2′ and O₃′ recorded in the respective sub-areas 11₁, 11₂ and 11₃ are simultaneously reconstructed from the recorded first-stage hologram 11, so that a second-stage hologram recording material 21 is located near the reconstructed object images O₁′, O₂′ and O₃′ for recording them as a reflection or transmission type volume hologram.