Patent ID: 7804633

Claim:
A hologram recording film comprising: a photosensitive material; wherein: a duplicative hologram duplicated from a hologram recorded in a volume hologram original plate is recorded in said photosensitive material; a first information pattern is recorded in said photosensitive material; a second information pattern is recorded in said photosensitive material in superposition with said first information pattern, wherein said second information pattern is a hologram of a shadow of said first information pattern that is incident on said volume hologram original plate; an image of said first information pattern and an image of said second information pattern are simultaneously reconstructed in superimposition, along with an image reconstructed from said duplicative hologram, by illuminating said hologram recording film with white illuminating light, and when said images are reconstructed, said image of said first information pattern is located in an image plane of said reconstructed image of said duplicative hologram, and said image of said second information pattern is located in front of or behind said image plane.