Patent ID: 9217086
Filing Date: 2015-12-22
Classification: C03C,C09D

Abstract:
1. A method of fabricating an anti-reflective optically transparent structure, the method comprising: providing an optically transparent substrate having a first refractive index and a first surface; and forming an anti-reflective layer within the first surface of the transparent substrate which includes forming a nano-scale pattern within the first surface defining a subwavelength nano-structured second surface of the anti-reflective layer including a plurality of protuberances having a predetermined maximum distance between adjacent protuberances and a predetermined height for a given wavelength such that the anti-reflective layer includes a second refractive index lower than the first refractive index to minimize light diffraction and random scattering therethrough, wherein the predetermined height is approximately equal to a quarter of the given wavelength divided by the second refractive index, and wherein nanosphere lithography is used to form the anti-reflective layer.