Patent ID: 7332044
Filing Date: 2008-02-19
Classification: B32B,G02B,Y10T

Abstract:
1. A manufacturing process for a narrowband multi-layer optical filter comprising the following steps: (a) depositing a plurality of thin-film layers of optical material on a first support substrate having a residual rms roughness of less than one nanometer to form a first multi-layer stack of said thin-film layers; (b) depositing said plurality of thin-film layers of optical material on a second support substrate having a residual rms roughness of less than one nanometer to form a second multi-layer stack of said thin-film layers; and (c) combining said first and second multi-layer stacks to form a symmetrical structure of said thin-film layers; wherein at least one of said depositing, steps (a) and (b) includes depositing a layer of spacer material over said plurality of thin-film layers, and said combining step includes bonding said first and second multi-layer stacks in optical contact by wetting the first and second multi-layer stacks with a liquid film in the absence of an adhesive material, optically combining the stacks through the liquid film, and allowing the liquid film to dry.