Limited echelette lens, systems and methods
First Claim
Patent Images
1. An ophthalmic lens comprising:
- an anterior face and a posterior face, the faces disposed about an optical axis; and
at least one diffractive profile imposed on the anterior face or the posterior face, the at least one diffractive profile comprised of an inner echelette and between 1 and 4 peripheral echelettes, wherein at least 2 echelettes are not adjacent to each other and are separated by a refractive region; and
wherein the inner echelette and the peripheral echelette(s) are not separated by a refractive region.
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Abstract
Systems and methods for providing enhanced image quality across a wide and extended range of foci encompass vision treatment techniques and ophthalmic lenses such as contact lenses and intraocular lenses (IOLs). Exemplary IOL optics can include a circular surface structure with limited adjacent echelettes which act as a diffractive or phase shifting profile.
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Citations
24 Claims
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1. An ophthalmic lens comprising:
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an anterior face and a posterior face, the faces disposed about an optical axis; and at least one diffractive profile imposed on the anterior face or the posterior face, the at least one diffractive profile comprised of an inner echelette and between 1 and 4 peripheral echelettes, wherein at least 2 echelettes are not adjacent to each other and are separated by a refractive region; and
wherein the inner echelette and the peripheral echelette(s) are not separated by a refractive region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An ophthalmic lens comprising:
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an anterior face and a posterior face, the faces disposed about an optical axis; and at least one diffractive profile imposed on the anterior face or the posterior face, the at least one diffractive profile comprised of an inner echelette and between 1 and 4 peripheral echelettes, wherein at least 2 echelettes are not adjacent to each other and are separated by a refractive region; and
wherein the inner and peripheral echelettes are characterized by a surface area between 1 and 7 square millimeters. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An ophthalmic lens comprising:
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an anterior face and a posterior face, the faces disposed about an optical axis; and at least one diffractive profile imposed on the anterior face or the posterior face, the at least one diffractive profile comprised of an inner echelette and between 1 and 4 peripheral echelettes, wherein at least 2 echelettes are not adjacent to each other and are separated by a refractive region; and
wherein the inner and peripheral echelettes have the same surface area. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification