Crazing resistant coating and method thereof
AssigneeVision Ease, LP
InventorsJeff Brown, Michael Marshall, John T. Moxon
Life of this patent
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Abstract
An anti-reflective coating system configured to resist crazing resulting from applied compressive forces, and an optical article employing the anti-reflective coating system; and methods of forming the same. The methods include forming a first anti-reflective coating over a first surface of the optical article and applying a second anti-reflective coating over a second surface of the optical article, where the second anti-reflective coating has substantially the same reflectance than the first anti-reflective coating and a mechanical property distinct from the first anti-reflective coating.
Claims13
A method for forming an optical article having anti-reflective properties comprising:
- applying a hard-coating on a first and a second optical surface of an optical article;
- forming a first anti-reflective coating over the hard-coating of the first optical surface, the first anti-reflective coating having a reflectance over a visible spectrum and a mechanical property;
- and
- forming a second anti-reflective coating over the hard-coating of the second optical surface, the second anti-reflective coating having a substantially same reflectance over 400 nm to 780 nm as the reflectance of the first anti-reflective coating, substantially the same color as the first anti-reflective coating, and a mechanical property distinct from the mechanical property of the first anti-reflective coating.
A method for forming an optical article having anti-reflective properties comprising:
- applying a first hard-coating over a first side and a second side of an optical article;
- applying a first anti-reflective stack over the hard-coating on the first side of the optical article;
- and,
- applying a second anti-reflective stack over the hard-coating on the second side of the optical article;
- said second anti-reflective stack being mechanically distinct from said first anti-reflective stack;
- wherein a first reflection spectrum of the first side of the optical article is substantially the same as a second reflection spectrum on the second side of the optical article;
- wherein the first anti-reflective stack comprises fewer total layers of a high, mid, and/or low refractive index material than the second anti-reflective stack.
Dependencies are inferred from the claim text.