US5117306A
Expired / Lapsed
US
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Diffraction bifocal with adjusted chromaticity
Assignee: Individual
•
Filing: 1990-07-17
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Granted: 1992-05-26
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Expires: 2010-07-17
Abstract
Abstract A diffraction bifocal lens or lens system, comprising two profiled surfaces or interfaces or a linear combination thereof, wherein one profile provides for the bifocality of the lens and the other profile compensates for chromatic aberration. These lenses or lens systems exhibit two focal points, one which exhibits positive chromatic aberration and the other which exhibits negative chromatic aberration.
Inventors
- 👤 Allen L. Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:59
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/0025; G02B27/0037; A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1613; A61F2/1648; A61F2/1654; G02B27/42; G02B27/4205; G02B27/4211; G02B27/4272; G02B27/4277; G02B5/00; G02B5/18; G02B5/1876; G02B5/189; G02B5/1895; G02C; G02C7/00; G02C7/02; G02C7/04; G02C7/041; G02C7/042; G02C2202/00; G02C2202/20
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
178 words
An optical lens comprising; (a) a first profiled surface or interface, for diffracting light to two adjacent non negative focal orders m and (m+1), m=0, 1, 2,. . . , comprising a plurality of annular concentric zones spaced according to the formula r.sub.k =√(k dλ) k=1, 2, 3, where λ is the design wavelength, d is the primary focal length of the surface or interface. k is a zone, and r k is the zone radius, and (b) a second profiled surface or interface, for diffracting light to a negative focal order -M, M=1, 2, 3, . . . , comprising a plurality of annular concentric zones spaced according to the formula R.sub.k =√(kDλ) k=1, 2, 3, where D is the primary focal length of the surface or interface, and R k is the zone radius, said surfaces aligned such that their optical axes are coincident, and such that (m+1)/d >M/D >m/d thereby providing for positive chromatic aberration to be associated with a first focal point and negative chromatic aberration to be associated with a second focal point.
Claim 2
Dependent Claim
178 words
An optical lens comprising; (a) a first profiled surface or interface, for diffracting light to two adjacent non negative focal orders m and (m+1), m=0, 1, 2,. . . , comprising a plurality of annular concentric zones spaced according to the formula r.sub.k =√(k dλ) k=1, 2, 3, where λ is the design wavelength, d is the primary focal length of the surface or interface. k is a zone, and r k is the zone radius, and (b) a second profiled surface or interface, for diffracting light to a negative focal order -M, M=1, 2, 3, . . . , comprising a plurality of annular concentric zones spaced according to the formula R.sub.k =√(kDλ) k=1, 2, 3, where D is the primary focal length of the surface or interface, and R k is the zone radius, said surfaces aligned such that their optical axes are coincident, and such that (m+1)/d >M/D >m/d thereby providing for positive chromatic aberration to be associated with a first focal point and negative chromatic aberration to be associated with a second focal point.
Claim 3
Dependent Claim
38 words
An optical lens according to claim 1 wherein; (m+1/2)/d>M/D>m/d, thereby providing that the amount of positive chromatic aberration associated with the first focal point exceeds the amount of the negative chromatic aberration associated with the second focal point.
Claim 4
Dependent Claim
22 words
The lens according to claim 2, wherein the lens is configured as a contact lens to be worn on an individual's eye.
Claim 5
Dependent Claim
22 words
The lens according to claim 2, wherein the lens is configured as an intraocular lens to be inserted into an individual's eye.
Claim 6
Dependent Claim
38 words
An optical lens according to claim 1 wherein; (m+1)/d>M/D>(m+1/2)/d, thereby providing that the amount of negative chromatic aberration associated with the second focal point exceeds the amount of the positive chromatic aberration associated with the first focal point.
Claim 7
Dependent Claim
22 words
The lens according to claim 5, wherein the lens is configured as a contact lens to be worn on an individual's eye.
Claim 8
Dependent Claim
22 words
The lens according to claim 5, wherein the lens is configured as an intraocular lens to be inserted into an individual's eye.
Claim 9
Dependent Claim
22 words
The lens according to claim 1, wherein the lens is configured as a contact lens to be worn on an individual's eye.
Claim 10
Dependent Claim
22 words
The lens according to claim 1, wherein the lens is configured as an intraocular lens to be inserted into an individual's eye.
Claim 11
Dependent Claim
181 words
An optical lens comprising; (a) a first profiled surface or interface, for diffracting light to two adjacent non positive focal orders -m and -(m+1), m=0,1,2, . . . , comprising a plurality of annular concentric zones spaced according to the formula r.sub.k =√(kd λ)k=1, 2, 3, . . . , where λ is the design wavelength, d is the primary focal length of the surface or interface, k is a zone, and r k is the zone radius, and (b) a second profiled surface or interface, for diffracting light to a positive focal order +M, M=1, 2, 3, . . . , comprising a plurality of annular concentric zones spaced according to the formula R.sub.k =√(kDλ)k=1, 2, 3, . . . , where D is the primary focal length of the surface or interface, and R k is the zone radius, said surfaces aligned such that their optical axes are coincident, and such that (m+1)/d>M/D>m/d thereby providing for positive chromatic aberration to be associated with a first focal point and negative chromatic aberration to be associated with a second focal point.
Claim 12
Dependent Claim
181 words
An optical lens comprising; (a) a first profiled surface or interface, for diffracting light to two adjacent non positive focal orders -m and -(m+1), m=0,1,2, . . . , comprising a plurality of annular concentric zones spaced according to the formula r.sub.k =√(kd λ)k=1, 2, 3, . . . , where λ is the design wavelength, d is the primary focal length of the surface or interface, k is a zone, and r k is the zone radius, and (b) a second profiled surface or interface, for diffracting light to a positive focal order +M, M=1, 2, 3, . . . , comprising a plurality of annular concentric zones spaced according to the formula R.sub.k =√(kDλ)k=1, 2, 3, . . . , where D is the primary focal length of the surface or interface, and R k is the zone radius, said surfaces aligned such that their optical axes are coincident, and such that (m+1)/d>M/D>m/d thereby providing for positive chromatic aberration to be associated with a first focal point and negative chromatic aberration to be associated with a second focal point.
Claim 13
Dependent Claim
38 words
An optical lens according to claim 10 wherein; (m+1/2)/d>M/D>m/d, thereby providing that the amount of negative chromatic aberration associated with the second focal point exceeds the amount of the positive chromatic aberration associated with the first focal point.
Claim 14
Dependent Claim
22 words
The lens according to claim 11 wherein the lens is configured as a contact lens to be worn on an individual's eye.
Claim 15
Dependent Claim
22 words
The lens according to claim 11 wherein the lens is configured as an intraocular lens to be inserted into an individual's eye.
Claim 16
Dependent Claim
38 words
An optical lens according to claim 10 wherein; (m+1)/d>M/D>(m+1/2)/d, thereby providing that the amount of positive chromatic aberration associated with the first focal point exceeds the amount of the negative chromatic aberration associated with the second focal point.
Claim 17
Dependent Claim
22 words
The lens according to claim 14 wherein the lens is configured as a contact lens to be worn on an individual's eye.
Claim 18
Dependent Claim
22 words
The lens according to claim 14 wherein the lens is configured as an intraocular lens to be inserted into an individual's eye.
Claim 19
Dependent Claim
22 words
The lens according to claim 10 wherein the lens is configured as a contact lens to be worn on an individual's eye.
Claim 20
Dependent Claim
22 words
The lens according to claim 10 wherein the lens is configured as an intraocular lens to be inserted into an individual's eye.
Claim 21
Dependent Claim
65 words
An optical lens comprising one profiled surface or interface, for diffracting light to two distinct focal powers, comprising a plurality of annular concentric zones, and providing for positive chromatic aberration to be associated with a first focal point and negative chromatic aberration to be associated with a second focal point such that the amount of negative chromatic aberration exceeds the amount of positive chromatic aberration.
Claim 22
Dependent Claim
65 words
An optical lens comprising one profiled surface or interface, for diffracting light to two distinct focal powers, comprising a plurality of annular concentric zones, and providing for positive chromatic aberration to be associated with a first focal point and negative chromatic aberration to be associated with a second focal point such that the amount of negative chromatic aberration exceeds the amount of positive chromatic aberration.
Claim 23
Dependent Claim
22 words
The lens according to claim 19, wherein the lens is configured as a contact lens to be worn on an individual's eye.
Claim 24
Dependent Claim
22 words
The lens according to claim 19, wherein the lens is configured as an intraocular lens to be inserted into an individual's eye.
Claim 25
Dependent Claim
65 words
An optical lens comprising one profiled surface or interface, for diffracting light to two distinct focal powers, comprising a plurality of annular concentric zones, and providing for positive chromatic aberration to be associated with a first focal point and negative chromatic aberration to be associated with a second focal point such that the amount of positive chromatic aberration exceeds the amount of negative chromatic aberration.
Claim 26
Dependent Claim
65 words
An optical lens comprising one profiled surface or interface, for diffracting light to two distinct focal powers, comprising a plurality of annular concentric zones, and providing for positive chromatic aberration to be associated with a first focal point and negative chromatic aberration to be associated with a second focal point such that the amount of positive chromatic aberration exceeds the amount of negative chromatic aberration.
Claim 27
Dependent Claim
22 words
The lens according to claim 22, wherein the lens is configured as a contact lens to be worn on an individual's eye.
Claim 28
Dependent Claim
22 words
The lens according to claim 22, wherein the lens is configured as an intraocular lens to be inserted into an individual's eye.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-26 | 1995-11-25 | 1996-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-26 | 1999-11-25 | 2000-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-26 | 2003-11-25 | 2004-05-26 | $7700.00 | Window Closed / Lapsed |