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US5042936A
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Progressive ophthalmic lens
Assignee: RODIS INFORMATIONSSYSTEME GmbH
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Filing: 1988-11-25
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Granted: 1991-08-27
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Expires: 2008-11-25
Abstract
Abstract PCT No. PCT/DE88/00730 Sec. 371 Date Jul. 14, 1989 Sec. 102(e) Date Jul. 14, 1989 PCT Filed Nov. 25, 1988 PCT Pub. No. WO89/04986 PCT Pub. Date Jun. 1, 1989.A progressive ophthalmic lens comprising a distance portion, the refractive power of which being designed for distance vision, a reading portion, the refractive power of which being designed for near vision, and an intermediate portion, in which the refractive power along the main line of vision at least partially increases continuously from the refractive power of the distance portion to the reading portion. A refractive index of the lens material varies along the main line of vision at least in the intermediate portion so as to at least partially contribute to the increase in refractive power and correction of aberrations.
Inventors
- 👤 Gunther Guilino
- 👤 Herbert Pfeiffer
- 👤 Helmut Altheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:09
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/06; G02C7/061; G02C7/063; G02C7/065; G02C2202/00; G02C2202/12
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
148 words
A progressive ophthalmic lens comprising a distance portion having a refractive power designed for distance vision, a reading portion having a refractive power designed for near vision, and an intermediate portion including means for providing a refractive power along the main line of vision which increases the refractive power of said distance portion to said reading portion, said intermediate portion means providing a varying refractive index n of the lens material along said main line of vision at least in said intermediate portion for contributing to the increase in refractive power and to correction of aberrations wherein there is an x axis that is the horizontal axis, a y axis that is the vertical axis, and x' and y' axes when compared to the horizontal and vertical axes, respectively, that are pitched according to the convergence of the pair of axes when lowering the glance for near vision.
Claim 2
Dependent Claim
148 words
A progressive ophthalmic lens comprising a distance portion having a refractive power designed for distance vision, a reading portion having a refractive power designed for near vision, and an intermediate portion including means for providing a refractive power along the main line of vision which increases the refractive power of said distance portion to said reading portion, said intermediate portion means providing a varying refractive index n of the lens material along said main line of vision at least in said intermediate portion for contributing to the increase in refractive power and to correction of aberrations wherein there is an x axis that is the horizontal axis, a y axis that is the vertical axis, and x' and y' axes when compared to the horizontal and vertical axes, respectively, that are pitched according to the convergence of the pair of axes when lowering the glance for near vision.
Claim 3
Dependent Claim
18 words
An ophthalmic lens according to claim 1, wherein the refractive index n at least is a function f(y).
Claim 4
Dependent Claim
18 words
An ophthalmic lens according to claim 1, wherein said refractive index n at least is a function f(y').
Claim 5
Dependent Claim
37 words
An ophthalmic lens according to claim 1 or 2, wherein at least one surface of said ophthalmic lens is provided with intersecting lines y=const, the radii of curvature of which vary for the correction of imaging errors.
Claim 6
Dependent Claim
36 words
An ophthalmic lens according to claim 1 or 2, wherein at least one surface of said ophthalmic lens is provided with intersecting lines y'=const, the radii of curvature which vary for the correction of imaging errors.
Claim 7
Dependent Claim
49 words
An ophthalmic lens according to claim 5, wherein the variation of the radius of curvature of said intersecting lines is such at least in the vicinity of the y' axis that said radii of curvature become larger with distance from the y' axis at least in said reading portion.
Claim 8
Dependent Claim
39 words
An ophthalmic lens according to claim 5, wherein the radii of curvature for x'=0 is selected in such a manner that the saggital refractive power S' sag is practically the same as the meridional refractive power S' mer .
Claim 9
Dependent Claim
29 words
An ophthalmic lens according to claims 1, 2 or 3, wherein two are axially symmetrical surfaces are provided and said refractive index n is a function f(x,y,) and f(x',y').
Claim 10
Dependent Claim
41 words
An ophthalmic lens according to claims 3, wherein for the refractive index functions contributing to the increase in refractive power and to the correction of astigmatism: n(x,y)=n(y)+2n.sub.2 (y)*x.sup.2 /(1 +(1 -χ(y)+1) *4n.sub.2.sup.2 (y)*x.sup.2)).sup.1/2 and n(x,y')=n(y')+2n.sub.2 (y') *x.sup.2 /(1+(1-χ(y')+1) *4n.sub.2.sup.2 (y') *x.sup.2)).sup.1/2
Claim 11
Dependent Claim
10 words
An ophthalmic lens according to claim 9, wherein (y)=constant=0. 0
Claim 12
Dependent Claim
24 words
An ophthalmic lens according to claim 9 wherein n(y)=a/(b+y)+n.sub.4 (y)x.sup.4 +n.sub.6 (y)x.sup.6 and n(y')=a/(b+y')+n.sub.4 (y')x'.sup.4 +n.sub.6 (y') x'.sup.6 whereby a and b are constants.
Claim 13
Dependent Claim
39 words
An ophthalmic lens according to claim 6, wherein the radii of curvature for x'=0 is selected in such a manner that the saggital refractive power S' sag is practically the same as the meridional refractive power S' mer .
Claim 14
Dependent Claim
36 words
An ophthalmic lens according to 5, wherein for the refractive index functions contributing to the increase in refractive power and to the correction of astigmatism n(x,y)=n(y)+2n.sub.2 (y)*x.sup.2 /(1+(1-χ(y)+1) *4n.sub.2.sup.2 (y)*x.sub.2)).sup.1/2 and n(x,y)=n(y')+2n.sub.2 (y')*x.sub.2 /(1+(1-(χ(y') +1)*4n.sub.2 (y')*x.sub.2)).sup.1/2
Claim 15
Dependent Claim
36 words
An ophthalmic lens according to 5, wherein for the refractive index functions contributing to the increase in refractive power and to the correction of astigmatism n(x,y)=n(y)+2n.sub.2 (y)*x.sup.2 /(1+(1-χ(y)+1) *4n.sub.2.sup.2 (y)*x.sub.2)).sup.1/2 and n(x,y)=n(y')+2n.sub.2 (y')*x.sub.2 /(1+(1-(χ(y') +1)*4n.sub.2 (y')*x.sub.2)).sup.1/2
Claim 16
Dependent Claim
36 words
An ophthalmic lens according to 6, wherein for the refractive index functions contributing to the increase in refractive power and to the correction of astigmatism n(x,y)=n(y)+2n.sub.2 (y)*x.sup.2 /(1+(1-χ(y)+1) *4n.sub.2.sup.2 (y)*x.sub.2)).sup.1/2 and n(x,y)=n(y')+2n.sub.2 (y')*x.sub.2 /(1+(1-(χ(y') +1)*4n.sub.2 (y')*x.sub.2)).sup.1/2
Claim 17
Dependent Claim
36 words
An ophthalmic lens according to 6, wherein for the refractive index functions contributing to the increase in refractive power and to the correction of astigmatism n(x,y)=n(y)+2n.sub.2 (y)*x.sup.2 /(1+(1-χ(y)+1) *4n.sub.2.sup.2 (y)*x.sub.2)).sup.1/2 and n(x,y)=n(y')+2n.sub.2 (y')*x.sub.2 /(1+(1-(χ(y') +1)*4n.sub.2 (y')*x.sub.2)).sup.1/2
Claim 18
Dependent Claim
36 words
An ophthalmic lens according to 7, wherein for the refractive index functions contributing to the increase in refractive power and to the correction of astigmatism n(x,y)=n(y)+2n.sub.2 (y)*x.sup.2 /(1+(1-χ(y)+1) *4n.sub.2.sup.2 (y)*x.sub.2)).sup.1/2 and n(x,y)=n(y')+2n.sub.2 (y')*x.sub.2 /(1+(1-(χ(y') +1)*4n.sub.1 (y')*x.sub.2)).sup.1/2
Claim 19
Dependent Claim
36 words
An ophthalmic lens according to 7, wherein for the refractive index functions contributing to the increase in refractive power and to the correction of astigmatism n(x,y)=n(y)+2n.sub.2 (y)*x.sup.2 /(1+(1-χ(y)+1) *4n.sub.2.sup.2 (y)*x.sub.2)).sup.1/2 and n(x,y)=n(y')+2n.sub.2 (y')*x.sub.2 /(1+(1-(χ(y') +1)*4n.sub.1 (y')*x.sub.2)).sup.1/2
Claim 20
Dependent Claim
36 words
An ophthalmic lens according to 8, wherein for the refractive index functions contributing to the increase in refractive power and to the correction of astigmatism n(x,y)=n(y)+2n.sub.2 (y)*x.sup.2 /(1(1-χ(y)+1) *4n.sub.2.sup.2 (y)*x.sub.2)).sup.1/2 and n(x,y)=n(y')+2n.sub.2 (y')*x.sub.2 /(1+(1-(χ(y') +1)*4n.sub.2 (y')*x.sub.2)).sup.1/2
Claim 21
Dependent Claim
36 words
An ophthalmic lens according to 8, wherein for the refractive index functions contributing to the increase in refractive power and to the correction of astigmatism n(x,y)=n(y)+2n.sub.2 (y)*x.sup.2 /(1(1-χ(y)+1) *4n.sub.2.sup.2 (y)*x.sub.2)).sup.1/2 and n(x,y)=n(y')+2n.sub.2 (y')*x.sub.2 /(1+(1-(χ(y') +1)*4n.sub.2 (y')*x.sub.2)).sup.1/2
Claim 22
Dependent Claim
23 words
An ophthalmic lens according to claim 9, wherein n(y)=a/(b+y)+n.sub.4 (y)x.sup.4 =n.sub.6 (y)x.sup.6 and n(y')=a/(b+y)+n.sub.4 (y')x'.sup.4 +n.sub.6 (y')x'.sup.6 where a and b are constants.
Claim 23
Dependent Claim
21 words
An ophthalmic lens according to claim 1, wherein said intermediate portion means enables correction of astigmatism as a correction of aberrations.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-08-26 | 1995-02-25 | 1995-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-26 | 1999-02-25 | 1999-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-26 | 2003-02-25 | 2003-08-27 | $7700.00 | Window Closed / Lapsed |