Patent ID: 6919134
Filing Date: 2005-07-19
Classification: G02B,Y10T

Abstract:
1. An optical element comprising a plastic substrate, a cured film and an antireflection film, wherein the antireflection film is so configured that a first hybrid layer is nearest to the plastic substrate and another hybrid layer, which may be the same or different from the first hybrid layer, is remotest from it, and wherein each hybrid layer comprises at least one inorganic substance and at least one organic substance, wherein the cured film is between the substrate and antireflection film and is formed by curing a composition which comprises metal oxide colloid particles and an organosilicon compound of the following general formula: wherein R 7 and R 8 each independently represent an organic group selected from an alkyl group having from 1 to 8 carbon atoms, an alkenyl group having from 2 to 8 carbon atoms, an aryl group having from 6 to 8 carbon atoms, an acyl group having from 1 to 8 carbon atoms, a halogen atom, a glycidoxy group, an epoxy group, an amino group, a mercapto group, a methacryloxy group and a cyano group; R 9 represents an organic group selected from an alkyl group having from 1 to 8 carbon atoms, an acyl group having from 1 to 8 carbon atoms and an aryl group having from 6 to 10 carbon atoms; and a and b each independently represent an integer of 0 or 1.