Functional layer application system
AssigneeHOYA Optical Labs of America, Inc.
InventorsDavid Olund, Craig Drury, James Kunkel
Life of this patent
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Abstract
Systems and methods for adding a functional layer to a lens having a plurality of microlenses for inhibition of ametropia. The lens may include defocus incorporated multiple segments (DIMS) having a plurality of microlenses or lenslets producing refraction areas with different refraction forces. Injection molding may be utilized to add a functional layer to such a DIMS lens having a plurality of microlenses or lenslets. The functional layer may add a functional utility to the lens, including but not limited to photochromic functionality, polarization functionality, and the like.
Claims20
A method of fabricating a lens having microlenses with a functional layer, comprising the steps of:
- providing a mold having a first and a second side,
- wherein the first side includes a plurality of features configured to form a corresponding array of microlenses;
- setting the first side of the mold to a first temperature and the second side of the mold to a second temperature, wherein the second temperature is lower than the first temperature;
- providing a laminate having a functional layer at the first side of the mold;
- injecting a material into the mold at a velocity;
- applying a first pack pressure for a first duration of time;
- applying a second pack pressure for a second duration of time;
- and
- allowing the mold to cool thereby forming the lens having microlenses with a functional layer.
A method of fabricating a lens having microlenses with a functional layer, comprising the steps of:
- providing a mold having a first side and a second side,
- wherein the first side includes a plurality of features configured to form a corresponding array of microlenses;
- setting the first side of the mold to a first temperature and the second side of the mold to a second temperature, wherein the second temperature is lower than the first temperature;
- providing a laminate having a functional layer at the first side of the mold;
- injecting a material into the mold;
- applying a first pack pressure for a first duration of time;
- applying a second pack pressure for a second duration of time;
- applying a third pack pressure for a third duration of time;
- and
- allowing the mold to cool thereby forming the lens having microlenses with a functional layer.
Dependencies are inferred from the claim text.