Photosensitive composition for hologram recording, hologram recording medium, and hologram

A hologram having an amount of refractive index change of 0.06 or more, wherein the hologram is produced by irradiating a hologram recording medium comprising:

• at least one transparent base material;
• and
• at least one photosensitive layer formed on the at least one transparent base material,
• wherein the at least one photosensitive layer comprises a photosensitive composition comprising at least two kinds of photopolymerizable monomers, a photopolymerization initiator, a binder resin, and a polymerization inhibitor,
• wherein the at least two kinds of photopolymerizable monomers are a monofunctional carbazole monomer selected from the group consisting of 2-(9H-carbazole-9-yl)ethyl acrylate and 9H-carbazole-9-ethylmethacrylate and a polyfunctional fluorene monomer,
• wherein an amount of the polymerization inhibitor is from 0.1% to 10% by mass of the photosensitive composition and a molar ratio of the polymerization inhibitor to the photopolymerization initiator is 0.5 to 1.5.

A photosensitive composition for hologram recording comprising at least two kinds of photopolymerizable monomers;

• a photopolymerization initiator;
• a binder resin;
• and a polymerization inhibitor,
• wherein the at least two kinds of photopolymerizable monomers are a monofunctional monomer and a polyfunctional monomer, wherein the monofunctional monomer is a carbazole monomer and the polyfunctional monomer is a fluorene monomer,
• wherein the polymerization inhibitor is a hindered phenol and an amount of the polymerization inhibitor is from 0.1% to 10% by mass of the photosensitive composition and a molar ratio of the polymerization inhibitor to the photopolymerization initiator is 0.1 to 10.