Patent ID: 8815472
Filing Date: 2014-08-26
Classification: G03F,G03H,G11B

Abstract:
1. A volume hologram optical recording medium comprising a recording layer comprising at least one compound selected from the group consisting of a compound (A1) having a terpenoid structure; a compound (A2) represented by a formula (I): wherein R a polymerizable photoactive compound (B), and a resin matrix (C) having a glass transition temperature of Tg of which is in the range of −45° C. or higher, wherein the resin matrix is a three dimensionally cross-linked resin, and wherein upon volume hologram optical recording, the optical recording medium exhibits a ratio R1 of diffraction efficiency five minutes after a recording with a light irradiation of 10-10,000 pulses of 0.2-0.4 mW of recording light when the light irradiation is ceased to diffraction efficiency one minute after the recording when the light irradiation is ceased, wherein R1 is from 0.1 to 2.1.