Patent ID: 6582881
Filing Date: 2003-06-24
Classification: G11B,Y10S

Abstract:
An optical recording element having a transparent substrate and on the surface of said substrate, a recording layer, a light reflecting layer; wherein the recording layer (a) comprises a (i) a metallized azo ether dye having an azo group linking a substituted 3-hydroxypyridine nucleus to a phenyl nucleus wherein the phenyl nucleus has an ether substituent ortho to the azo group and said phenyl nucleus is free of strong electron withdrawing groups and (ii) a cyanine dye and (b) has, when unrecorded, a refractive index at a selected wavelength from 400 to 660 nm, comprising a real part (n) greater than 1.8 and an imaginary part (k) less than 0.2.