Patent ID: 7666492
Filing Date: 2010-02-23
Classification: C03C,C09K,G02B,Y10T

Abstract:
1. A multilayer structure comprising: a flat-plate substrate having a surface perpendicular to a z-axis and parallel to x- and y-axes that are perpendicular to each other; a base layer provided in at least a part of said surface of said flat-plate substrate, said layer having a plurality of linear protrusions or grooves which are disposed parallel to said y-axis at a constant period in a direction of said x-axis; and a plurality of laminated layers made of at least two kinds of materials with different refractive indexes and laminated in a direction of said z-axis and on said base layer having said protrusions or grooves, each of said laminated layers having irregularities in said x-axis direction with the same period as said period of said protrusions or grooves; wherein said layer having said protrusions or grooves is made of a hardened gel material containing metal alkoxide, and wherein an x-z sectional shape of each of said protrusions or grooves in said layer having said protrusions or grooves is trapezoidal.