Patent ID: 7932000

Claim:
A hologram recording medium comprising at least a hologram recording material layer, wherein the hologram recording material layer comprises at least: an organometallic compound having at least a Ti—O bond and a Si—O bond which is a hydrolysis and polymerization product of an alkoxide compound of Ti and a diaryl dialkoxide compound of Si, and a photopolymerizable organic compound; and said hologram recording medium has a light transmittance of 50% or more at a wavelength of 405 nm, or a light reflectance of 25% or more at a wavelength of 405 nm, wherein the organometallic compound is obtained by subjecting an alkoxide compound of the corresponding metal(s) to a hydrolysis and a polymerization reaction in an organic solvent which contains no cyclic ether skeleton and no carbonyl oxygen, wherein the organic solvent is at least one selected from the group consisting of a monoalcohol and a monoalkyl ether of a dialcohol.