Photosensitive composition for volume hologram recording

A photosensitive composition for volume hologram recording, which is used for recording interference fringes produced by the interference of a laser beam or a light having excellent coherence as fringes having different refractive indices, said composition comprising the following components:

• (A) a cationic polymerizable compound and a radical polymerizable compound,
• (B) a cationic polymerization initiating material, and
• (C) a radical polymerization initiating material, wherein at least one of the cationic polymerizable compound and radical polymerizable compound have a siloxane group and are represented by the following:
• ##STR10## wherein at least one of X.sub.1 to X.sub.6 has a cationic polymerizable group at the terminal end and the remaining of X.sub.1 to X.sub.6 are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dialkylamino group, a phenyl group or a hydroxyl group;
• and n is an integer of 1 to 7, and ##STR11## wherein at least one of X.sub.1 to X.sub.6 has a radical polymerizable group at the terminal end and the remaining of X.sub.1 to X.sub.6 are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dialkylamino group, a phenyl group or a hydroxyl group;
• and n is an integer of 1 to 7.