Title:
METHOD OF MAKING OPHTHALMIC LENSES WITH A STRUCTURED SURFACE
Document Type and Number:
WIPO Patent Application WO/2012/093994
Kind Code:
A3
Abstract:
Method for fabricating a Fresnel lens or other lens having a structured surface such as refractive and/or diffractive bi-focal or other multi-focal lenses includes press-coating the structured surface with a low or very low refractive index coating material. The coating is sufficient thick to adequately cover the structured surface so that a smooth coating surface with good optical properties is obtained, in the case of a Fresnel structure a thickness greater than 1.5 times and less than 5 times the Fresnel structure height, and is cured in situ. A film, e.g., of PET, PC or PU or a film stack, e.g. a TAC/PVA/TAC film stack is prepared and a heat melting adhesive is applied to the side of the film or film stack to be brought into contact the coated structured surface of the lens blank. The film or film stack is then laminated to the cured coating.
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Inventors:
JIANG PEIQI (US)
KEEGAN BRUCE (US)
KEEGAN BRUCE (US)
Application Number:
PCT/US2011/020102
Publication Date:
November 01, 2012
Filing Date:
January 04, 2011
Export Citation:
Assignee:
ESSILOR INT (FR)
JIANG PEIQI (US)
KEEGAN BRUCE (US)
JIANG PEIQI (US)
KEEGAN BRUCE (US)
International Classes:
B29D11/00
Domestic Patent References:
| WO2009141376A1 | 2009-11-26 |
Foreign References:
| US20100110567A1 | 2010-05-06 | |||
| JPH06174904A | 1994-06-24 |
Attorney, Agent or Firm:
CASTEL, Benoit et al. (Suite 500Alexandria, Virginia, US)
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