Delamination resistant coated substrates and methods of preparing the same
An optical device includes a substrate having a surface, a peripheral edge, an area of vision, and a boundary portion of the surface between the peripheral edge and the area of vision. At least a portion of the boundary portion is textured. A coating is applied to the surface of the substrate over the area of vision and the textured boundary portion. In some embodiments, the substrate is comprised of a polymeric material and the coating is comprised of multiple layers of dielectric material and the substrate is textured such that the textured portion increases adhesion and the durability of the dielectric coating.
1. An optical device comprising:
a substrate having a surface, a peripheral edge, and an area of vision, a portion of the surface forming a boundary portion between the peripheral edge and the area of vision, at least a portion of the boundary portion being textured; and
a coating applied to the surface of the substrate over the area of vision and the textured boundary portion,
wherein the area of vision is optically transparent.
2. The optical device of claim 1 , wherein the substrate comprises a polymer.
3. The optical device of claim 1 , wherein the substrate is comprised of a polymer and the coating includes a dielectric coating.
4. The optical device of claim 1 , wherein the coating is comprised of two or more layers.
5. The optical device of claim 4 , wherein the two or more layers include metal and/or dielectric.
6. The optical device of claim 1 , wherein the textured boundary portion is optically opaque.
7. The optical device of claim 1 , wherein opposing surfaces of the substrate within the area of vision are smooth.
8. The optical device of claim 1 , wherein the textured boundary portion is on one or both side surfaces of the substrate.
9. The optical device of claim 1 , wherein the textured boundary portion is an entire portion of the surface extending between the peripheral edge and the area of vision.
10. The optical device of claim 1 , wherein the textured boundary portion is spaced from the peripheral edge.
11. The optical device of claim 1 , wherein the textured boundary portion extends entirely around the area of vision.
12. The optical device of claim 1 further comprising:
an additional substrate coupled to the coated surface.
13. A method comprising:
providing a substrate having a surface, a peripheral edge, and an area of vision, a portion of the surface forming a boundary portion between the peripheral edge and the area of vision;
texturing at least a portion of the boundary portion; and
applying a coating to the surface of the substrate,
wherein the area of vision is optically transparent.
14. The method of claim 13 , wherein the texturing is performed by an abrasive blasting process.
15. The method of claim 14 , wherein the abrasive blasting process uses a soft abrasive material.
16. The method of claim 15 , wherein the soft abrasive material comprises particles of sodium bicarbonate.
17. The method of claim 13 , wherein the substrate comprises a polymer.
18. The method of claim 13 , wherein the coating includes a dielectric coating.
19. The method of claim 13 , wherein applying the coating includes vacuum depositing one or more layers of material.
20. The method of claim 13 further comprising trimming the coated substrate around the area of vision to a new peripheral edge such that a remaining portion of the textured boundary extends between the new peripheral edge and the area of vision.
21. The method of claim 13 further comprising coupling an additional substrate to the coated surface.
22. The method of claim 13 , wherein the texturing is a result of surface texturing of a mold area specific to the desired textured area such that the substrate receives its textured area as a result of a mold process.
23. The method of claim 13 , wherein the texturing is performed by a chemical etch.
24. The method of claim 13 , wherein the texturing at least a portion of the boundary portion step includes rendering the textured portion of the boundary portion optically opaque.
25. The optical device of claim 1 , wherein the substrate includes a second surface opposite the first surface and the textured boundary portion is on both surfaces of the substrate.
26. The optical device of claim 1 , wherein the textured boundary portion includes jagged peaks and valleys.
27. The optical device of claim 1 , wherein a thickness of the textured boundary portion is variable from approximately 3 μm to approximate 5 μm.
28. The optical device of claim 1 , wherein the textured boundary portion is configured such that an intensity of a laser beam passing through the textured boundary portion is less than 1% of an intensity of the laser beam entering the textured boundary portion.