The present invention relates to blue 3-dicyanomethylidene-2,3-dihydrothiophen-1,1-dioxide based dyes which are useful as dyes in optical layers. In particular the invention relates to optical layers comprising such dyes, to a method for manufacturing such optical layers and to optical recording media comprising such optical layers.
本发明涉及基于 3-二
氰基亚甲基-
2,3-二氢噻吩-1,1-二氧化物的蓝色
染料,该
染料可用作光学层中的
染料。本发明尤其涉及包含这种
染料的光学层、制造这种光学层的方法和包含这种光学层的光学记录介质。