US 2015/0140316 A1 · PROTECTIVE COATING FOR LOW INDEX MATERIAL

Abstract

The present disclosure describes a protective coating for a low index material, and a process for preparing a protected low index material. The protective coating partially penetrates the pores of a low index material, providing a seal protecting the pores, and can strengthen the construction by forming a gradient in properties of the protected low index material. The present disclosure further provides a diffusing low index optical element having a protected low index material and a diffusing layer disposed on the low index material.

Claims39

Dependent claims

A method, comprising:

coating a first solution on a substrate, the first solution comprising a plurality of metal oxide particles, a binder, and a solvent, wherein the binder has a first concentration in the solvent;
coating a second solution on the first solution, the second solution comprising the binder at a second concentration in the solvent, the second concentration different from the first concentration;
and
removing the solvent from the first solution and the second solution to form a protected film, wherein a weight ratio of the binder to the metal oxide particles increases in a thickness direction of the protected film.

1 more element

Dependencies are inferred from the claim text.

Protective coating for low index material

Life of this patent

Protective coating for low index material

Life of this patent

Abstract

Claims39