Abstract
This disclosure describes materials that can be utilized to create a low refractive index layer that enables total internal reflection (TIR) while providing favorable mechanical properties. The coating materials described herein can achieve low modulus films with a refractive index below 1.40 while exhibiting good adhesion to rigid substrates. The substrate, e.g., glass, can be coated with a suitable low refractive index (LRI) composite. Per techniques of this disclosure, the composite materials can include combinations of hollow silica spheres with LRI materials such as siloxane resin, fluorinated acrylate resin, fluorinated epoxy resin, and fluorinated siloxane, respectively. The waveguides are suitable for use in devices such as augmented reality or virtual reality headsets.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Anonymous, "Low Refractive Index Coatings for Geometric Waveguides", Technical Disclosure Commons, (June 13, 2023)
https://www.tdcommons.org/dpubs_series/5975