Method suitable for producing a pattern on a spectacle lens
AssigneeCarl Zeiss Vision International GmbH
InventorsMathias Maffei, Sara Bertoncello, Giada Giglioli, Alberto Ferrari, Marco Macchi, Michael Krieger, Philipp Weis
Life of this patent
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Abstract
A method for applying a pattern on a spectacle lens substrate is disclosed. The method produces a low contact angle surface on a preselected part of a surface of the spectacle lens by plasma treating a preselected part of an uncoated surface of the spectacle lens substrate. Subsequently, a hard coating composition and optionally a primer coating composition are applied to the spectacle lens substrate.
Claims15
1-14. (canceled)
A method suitable for applying a pattern on a spectacle lens substrate having a surface, the method comprising the steps of:
- (i) producing a low contact angle surface on a preselected part of an uncoated surface of the spectacle lens substrate;
- and
- (ii) providing a hard coating composition to the spectacle lens substrate,
- wherein the preselected part has a greater thickness due to higher adhesion of the hard coating composition to the preselected part compared to the parts other than the preselected part, thereby forming the pattern on the spectacle lens substrate.
A spectacle lens having an anti-counterfeiting pattern on a surface of the spectacle lens,
- wherein a whole surface of the spectacle lens is coated with a hard coating composition,
- wherein the pattern consists of (i) a hard coating composition or (ii) a hard coating composition and a primer coating composition, and the pattern does not comprise a spectacle lens material, and
- wherein an amount of the hard coating composition making up the pattern is 5% to 30% greater than the amount of the hard coating composition adhered to the parts of the surface of the spectacle lens other than the pattern due to higher adhesion to the hard coating composition;
- and the pattern is an invisible or semi-invisible pattern.
Dependencies are inferred from the claim text.