US 12,032,125 B2
Protective transparent coating for optical filters
Xiaodong Sun, Abington Township, PA (US); and May L. Castro, Simpson, PA (US)
Assigned to GENTEX CORPORATION, Simpson, PA (US)
Appl. No. 16/971,864
Filed by Gentex Corporation, Simpson, PA (US)
PCT Filed Feb. 21, 2019, PCT No. PCT/US2019/018991
§ 371(c)(1), (2) Date Aug. 21, 2020,
PCT Pub. No. WO2019/165098, PCT Pub. Date Aug. 29, 2019.
Claims priority of provisional application 62/634,743, filed on Feb. 23, 2018.
Prior Publication US 2021/0011203 A1, Jan. 14, 2021
Int. Cl. G02B 1/14 (2015.01); A61F 9/02 (2006.01); G02B 5/28 (2006.01); G02C 7/10 (2006.01)
CPC G02B 1/14 (2015.01) [A61F 9/022 (2013.01); G02B 5/285 (2013.01); G02C 7/107 (2013.01); G02C 2202/16 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An optically transparent device comprising:
an exterior lens comprised of:
a concave surface configured to face toward a user, and a convex surface configured to face away from a user, each of the concave and convex surfaces being coated with an abrasion resistant coating; and
a dielectric optical filter coupled to the concave surface;
an adhesion primer coupled to the dielectric optical filter;
a protective acrylate coating coupled to the adhesion primer wherein the protective acrylate coating has a thickness of approximately 5 microns to approximately 50 microns; and
an anti-reflective and/or anti-fog coating coupled to the protective acrylate coating.