Patent ID: 7771915
Filing Date: 2010-08-10
Classification: B82Y,G11B

Abstract:
1. A two-photon absorbing optical recording material comprising a two-photon absorbing compound and a recording component, in which a recorded area and an unrecorded area are formed by utilizing a two-photon absorption of the two-photon absorbing compound, and a reflectance or transmittance differs between the recorded area and the unrecorded area, wherein the recording component contains a dye precursor capable of becoming a color-forming material, the dye precursor containing at least a dye precursor of the following formula (32): wherein A1 and PD are covalently bonded, A1 represents an organic compound moiety having a function of cutting the covalent bond with PD due to electron or energy transfer with the excited state of a two-photon absorbing compound, and PD represents an organic compound moiety capable of becoming a color-forming material when covalently bonded with A1 and becoming colored when released by the cutting of the covalent bond with A1, wherein the dye precursor of formula (32) is a compound represented by any one of the following formulae (33-1) to (33-6): in formulae (33-1) to (33-6), PD has the same meaning as in formula (32), R