Refractive-diffractive multifocal lens
First Claim
1. A lens, comprising:
- an insert having an index of refraction, the insert comprising a diffractive region;
a host lens having an index of refraction, the host lens comprising a progressive optical power region,wherein the diffractive region and the progressive optical power region are in optical communication and wherein the insert is embedded within the host lens,wherein the diffractive region provides a first incremental add power and the progressive optical power region provides a second incremental add power, the first and second incremental add powers collectively providing a full near add power of the lens,the insert has a thickness ranging from 50 μ
m to 500 μ
m, andthe first incremental add power is approximately one-third of the full near add power of the lens.
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Accused Products
Abstract
Aspects of the present invention provide multifocal lenses having one or more multifocal inserts comprising one or more diffractive regions. A diffractive region of a multifocal insert of the present invention can provide a constant optical power or can provide a progression of optical power, or any combination thereof. A multifocal insert of the present invention can be fabricated from any type of material and can be inserted into any type of bulk lens material. A diffractive region of a multifocal insert of the present invention can be positioned to be in optical communication with one or more optical regions of a host lens to provide a combined desired optical power in one or more vision zones. Index matching layers of the present invention can be used to reduce reflection losses at interfaces of the host lens and multifocal insert.
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Citations
19 Claims
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1. A lens, comprising:
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an insert having an index of refraction, the insert comprising a diffractive region; a host lens having an index of refraction, the host lens comprising a progressive optical power region, wherein the diffractive region and the progressive optical power region are in optical communication and wherein the insert is embedded within the host lens, wherein the diffractive region provides a first incremental add power and the progressive optical power region provides a second incremental add power, the first and second incremental add powers collectively providing a full near add power of the lens, the insert has a thickness ranging from 50 μ
m to 500 μ
m, andthe first incremental add power is approximately one-third of the full near add power of the lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 18, 19)
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9. A lens, comprising:
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an insert having an index of refraction, the insert comprising diffractive region; a host lens having an index of refraction, the host lens comprising a progressive optical power region, wherein the diffractive region and the progressive optical power region are in optical communication and wherein the insert is embedded within the host lens, wherein the diffractive region provides a first incremental add power and the progressive optical power region provides a second incremental add power, the first and second incremental add powers collectively providing a full near add power of the lens, the insert has a thickness ranging from 50 μ
m to 500 μ
m, andthe progressive optical power region begins at a top of the diffractive region and reaches approximately +0.1 D at approximately 3 mm below the top of the diffractive region.
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15. A lens, comprising:
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an insert having an index of refraction, the insert comprising a diffractive region; a host lens having an index of refraction, the host lens comprising a progressive optical power region, wherein the diffractive region and the progressive optical power region are in optical communication and wherein the insert is embedded within the host lens, wherein the diffractive region provides a first incremental add power and the progressive optical power region provides a second incremental add power, the first and second incremental add powers collectively providing a full near add power of the lens, wherein the diffractive region provides a progression of optical power, and wherein the first incremental add power varies from approximately +0.125 D to +3.00 D. - View Dependent Claims (16)
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17. A lens, comprising:
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an insert having an index of refraction, the insert comprising a diffractive region; a host lens having an index of refraction, the host lens comprising a progressive optical power region, wherein the diffractive region and the progressive optical power region are in optical communication and wherein the insert is embedded within the host lens, wherein the diffractive region provides a first incremental add power and the progressive optical power region provides a second incremental add power, the first and second incremental add powers collectively providing a full near add power of the lens, wherein the diffractive region provides a progression of optical power, and wherein the first incremental add power varies in steps of approximately 0.125 D.
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Specification