Richard A Farrell

US Patent:

20230125794, Apr 27, 2023

Filed:

Mar 22, 2022

Appl. No.:

17/701307

Inventors:

Marvin Dion Alim - Boulder CO, US
Richard Farrell - Seattle WA, US
Matthew E. Colburn - Woodinville WA, US
Ankit Vora - Bothell WA, US
Austin Lane - Sammamish WA, US

Assignee:

META PLATFORMS TECHNOLOGIES, LLC - Menlo Park CA

International Classification:

F21V 8/00
C08G 75/14
C08G 18/76
C08G 77/442
C08K 5/57
C08K 5/00
G02B 27/01
G02B 1/04

Abstract:

The present disclosure relates to systems and methods of making polymeric optical layers for optical layering applications. In an aspect, a waveguide device for a head mounted display is provided. The waveguide device may include a waveguide die having a first refractive index range and a polymeric optical layer. The polymeric optical layer may include a second refractive index range that is different from the first refractive index range and a thiol-containing polymer. For example, the thiol-containing polymer may include thiourethane. In some embodiments, the thiol-containing polymer may be formed from a monomer mixture including a thiol-containing compound and an isocyanate. For example, the thiol-containing compound may include 4-mercaptomethyl-3,6-dithia-1,8-octanedithiol (MDTODT) and/or the isocyanate may include m-xylylene diisocyanate (XDI). In some embodiments, the monomer mixture may include a second thiol-containing compound, such as, for example, 1,3-benzene dithiol (1,3-BDT).