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US 5,856,860 AGranted
Multi-focal optical elements
AssigneeVision-Ease Lens, Inc.
InventorsSujal N. Bhalakia, Thomas J. Moravec
Life of this patent
Estimating the term…
Abstract
A multi-focal lens with both a power portion and a functional portion, where the power portion imparts a majority of the optical power and magnification characteristics to the multi-focal lens and has a front side with both a main focal surface and a secondary focal surface that is discontinuous relative to the main focal surface and where the functional portion has a rear side that is shaped like the front side of the power portion with the rear side of the functional portion being affixed to the front side of the power portion.
Claims53
A multi-focal lens, the multi-focal lens comprising:
- a power portion that imparts a majority of the optical power and magnification characteristics to the multi-focal lens, the power portion having a front side with a main focal surface and a secondary focal surface, the main focal surface and the secondary focal surface discontinuous relative to each other;
- and
- a functional portion, the functional portion having a rear side shaped like the front side of the power portion and the rear side of the functional portion affixed to the front side of the power portion.
A multi-focal lens, the multi-focal lens comprising:
- a power portion, the power portion comprising resinous material and the power portion having a front side with a main focal surface and a secondary focal surface, the secondary focal surface offset relative to the main focal surface;
- and
- a functional portion, the functional portion having a rear side shaped like the front side of the power portion and the rear side of the functional portion affixed to the front side of the power portion, the functional portion comprising:
- a first resinous layer;
- a second resinous layer that is in working relation with, but is distinct from, the first resinous layer;
- a functional medium incorporated in or on the second resinous layer or between the first resinous layer and the second resinous layer;
- and
- wherein the first resinous layer is fused to the resinous material of the power portion.
5 more elements
A multi-focal lens, the multi-focal lens comprising:
- a primary part, the primary part having a front side with a main focal surface and a secondary focal surface, the secondary focal surface offset relative to the main focal surface;
- and
- a secondary part, the secondary part having a rear side shaped like the front side of the primary part and the rear side of the secondary part affixed to the front side of the primary part, the secondary part comprising:
- a thermoplastic layer;
- a resinous layer that is in working relation with, but is distinct from, the thermoplastic layer;
- and
- a functional medium that is incorporated into or onto the resinous layer or between the resinous layer and the thermoplastic layer.
4 more elements
A multi-focal lens, the multi-focal lens comprising:
- a power portion that is made of thermoplastic resinous material, the power portion having a front side with a main focal surface and a secondary focal surface, the main focal surface and the secondary focal surface discontinuous relative to each other;
- and
- a functional portion, the functional portion having a rear side shaped like the front side of the power portion and the rear side of the functional portion affixed to the front side of the power portion, the functional portion comprising:
- a first resinous film that is made of thermoplastic resinous material;
- and
- a functional medium that is in working relation with the first resinous film.
3 more elements
A multi-focal lens, the multi-focal lens comprising:
- a power portion that imparts a majority of the optical power and magnification characteristics to the multi-focal lens, the power portion having a front side with a main focal surface and a secondary focal surface, the secondary focal surface offset relative to the main focal surface;
- and
- a functional portion, the functional portion having a rear side shaped like the front side of the power portion and the rear side of the functional portion fused to the front side of the power portion.
A multi-focal lens, the multi-focal lens comprising:
- a power portion that imparts a majority of the optical power and magnification characteristics to the multi-focal lens, the power portion having a front side with a main focal surface and a secondary focal surface, the secondary focal surface offset relative to the main focal surface;
- and
- a functional portion, the functional portion having a rear side shaped like the front side of the power portion and the rear side of the functional portion affixed to the front side of the power portion, the functional portion comprising:
- a first resinous film;
- and
- a functional medium that is in working relation with the first resinous film, the functional medium comprising a photochromic substance, a photochromic compound, a light polarizing substance, a light polarizing compound, or a mixture that comprises a photochromic substance or compound and a light polarizing substance or compound.
3 more elements
Dependencies are inferred from the claim text.