US5096285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multifocal multizone diffractive ophthalmic lenses
Assignee: Iolab Corp
•
Filing: 1990-05-14
•
Granted: 1992-03-17
•
Expires: 2010-05-14
Abstract
Abstract Multifocal lenses for improving vision are disclosed. The lenses of the present invention use at least one diffractive zone located in a defined portion of the surface of a refractive lens to achieve highly efficient multifocal vision by providing nearly 100% efficiency in the +1 diffractive order. The lenses disclosed may be used for both contact lenses and intraocular lens as well as other vision correcting applications.
Inventors
- 👤 Donn M. Silberman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:13
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/04; G02C7/041; G02C7/044; A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1613; A61F2/1616; A61F2/1618; A61F2/1654; A61F2/1656; G02B; G02B5/00; G02B5/18; G02B5/1876; G02B5/188; G02C7/042; G02C7/045; G02C2202/00; G02C2202/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
A multifocal lens for correcting vision comprising: a basic lens element having a basic lens power and a basic focal length; one or more diffractive elements covering one or more zones of said basic lens element arranged as alternate semi-circular area and having a diffractive power, whereby a portion of the light travelling through said lens is focused at said basic focal length by said basic lens power, and another portion of the light travelling through said lens is focused t a different focal length by the combined power of said basic lens element and said diffractive elements.
Claim 2
Dependent Claim
98 words
A multifocal lens for correcting vision comprising: a basic lens element having a basic lens power and a basic focal length; one or more diffractive elements covering one or more zones of said basic lens element arranged as alternate semi-circular area and having a diffractive power, whereby a portion of the light travelling through said lens is focused at said basic focal length by said basic lens power, and another portion of the light travelling through said lens is focused t a different focal length by the combined power of said basic lens element and said diffractive elements.
Claim 3
Dependent Claim
100 words
A multifocal lens for correcting vision comprising: a basic lens element having a basic lens power and a basic focal length; and one of more diffractive elements covering one or more zones of said basic lens element arrayed as alternate quarter circular areas and having a diffractive power, whereby a portion of the light travelling through said lens is focused at said basic focal length by said basic lens power, and another portion of the light travelling through said lens is focused at a different focal length by the combined power of said basic lens element and said diffractive elements.
Claim 4
Dependent Claim
100 words
A multifocal lens for correcting vision comprising: a basic lens element having a basic lens power and a basic focal length; and one of more diffractive elements covering one or more zones of said basic lens element arrayed as alternate quarter circular areas and having a diffractive power, whereby a portion of the light travelling through said lens is focused at said basic focal length by said basic lens power, and another portion of the light travelling through said lens is focused at a different focal length by the combined power of said basic lens element and said diffractive elements.
Claim 5
Dependent Claim
134 words
A multifocal lens for correcting vision comprising: a basic lens element having a basic lens power and a basic focal length; one or more first diffractive elements covering one or more zones of said basic lens element and having a first diffractive power; and one or more second diffractive elements covering one or more zones of said basic lens element arranged as alternate semi-circular areas and having a second diffractive power, whereby a first portion of the light travelling through said lens is focused at a first focal length by the combined power of said basic lens element and said first diffractive elements, and another portion of the light travelling through said lens is focused at a second focal length by the combined power of said basic lens element and said second diffractive elements.
Claim 6
Dependent Claim
134 words
A multifocal lens for correcting vision comprising: a basic lens element having a basic lens power and a basic focal length; one or more first diffractive elements covering one or more zones of said basic lens element and having a first diffractive power; and one or more second diffractive elements covering one or more zones of said basic lens element arranged as alternate semi-circular areas and having a second diffractive power, whereby a first portion of the light travelling through said lens is focused at a first focal length by the combined power of said basic lens element and said first diffractive elements, and another portion of the light travelling through said lens is focused at a second focal length by the combined power of said basic lens element and said second diffractive elements.
Claim 7
Dependent Claim
135 words
A multifocal lens for correcting vision comprising: a basic lens element having a basic lens power and a basic focal length; one or more first diffractive elements covering one or more zones of said basic lens element and having a first diffractive power; and one or more second diffractive elements covering one or more zones of said basic lens element arrayed as alternating quarter circular area and having a second diffractive power, whereby a first portion of the light travelling through said lens is focused at a first focal length by the combined power of said basic lens element and said first diffractive elements, and another portion of the light travelling through said lens is focused at a second focal length by the combined power of said basic lens element and said second diffractive elements.
Claim 8
Dependent Claim
135 words
A multifocal lens for correcting vision comprising: a basic lens element having a basic lens power and a basic focal length; one or more first diffractive elements covering one or more zones of said basic lens element and having a first diffractive power; and one or more second diffractive elements covering one or more zones of said basic lens element arrayed as alternating quarter circular area and having a second diffractive power, whereby a first portion of the light travelling through said lens is focused at a first focal length by the combined power of said basic lens element and said first diffractive elements, and another portion of the light travelling through said lens is focused at a second focal length by the combined power of said basic lens element and said second diffractive elements.
References Cited (Backward Citations)
US4162122A
Cited
US4210391A
Cited
US4338005A
Cited
US4340283A
Cited
US4642112A
Cited
US4637697A
Cited
US4813955A
Cited
US4636211A
Cited
US4881804A
Cited
US4923296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-17 | 1995-09-16 | 1996-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-17 | 1999-09-16 | 2000-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-17 | 2003-09-16 | 2004-03-17 | $7700.00 | Window Closed / Lapsed |