Patent US4174156A successfully refreshed from Google Patents.
US4174156A
Expired / Lapsed
US
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Optical lens for differential correction
Assignee: Individual
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Filing: 1977-10-31
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Granted: 1979-11-13
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Expires: 1997-10-31
Abstract
Abstract An optical lens for differential correction comprising two transparent walls defining an enclosed space having therein a quantity of a transparent liquid with a predetermined optical index; the walls are so formed as to provide at the optical center a capillary space into which the liquid is aspirated when the lens is tilted at a predetermined angle for changing the power of the lens.
Inventors
- 👤 Gilbert Glorieux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:42
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/12; G02B3/14; G02C; G02C7/00; G02C7/02; G02C7/04; G02C7/041; G02C7/06; G02C7/08; G02C7/081; G02C7/085
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
111 words
A convergent optical correction lens comprising a pair of transparent walls defining a closed internal space therebetween, at least one transparent liquid of predetermined index of refraction in a portion of said internal space, said walls being configured so as to establish in said internal space a zone having a reduced thickness, said zone surrounding the optical axis of said lens and having a capillary volume, said liquid being present in the lower part of said internal space when the optical axis is substantially horizontal, and said liquid filling said capillary volume by capillary action when said lens is tilted in relation to the vertical by at least a predetermined angle.
Claim 2
Dependent Claim
111 words
A convergent optical correction lens comprising a pair of transparent walls defining a closed internal space therebetween, at least one transparent liquid of predetermined index of refraction in a portion of said internal space, said walls being configured so as to establish in said internal space a zone having a reduced thickness, said zone surrounding the optical axis of said lens and having a capillary volume, said liquid being present in the lower part of said internal space when the optical axis is substantially horizontal, and said liquid filling said capillary volume by capillary action when said lens is tilted in relation to the vertical by at least a predetermined angle.
Claim 3
Dependent Claim
32 words
A convergent optical lens as in claim 1, wherein said capillary volume is formed by an interior extra thickness provided on at least one of said walls and extending over said zone.
Claim 4
Dependent Claim
62 words
A convergent optical lens as in claim 1, wherein said two walls have a form adapted to the exterior of said zone for defining an internal space with a greater peripheral thickness in order to reduce the effect of the capillary forces at the area of greater peripheral thickness and to form a liquid reservoir at the bottom of the internal space.
Claim 5
Dependent Claim
35 words
A convergent optical lens as in claim 1, wherein the form of said walls and the quantity of liquid are adjusted such that said predetermined angle is on the order of approximately 30° to 40°.
Claim 6
Dependent Claim
83 words
A convergent optical lens as in claim 1, intended for an eye which necessitates an optical power P 1 for distance vision and a greater optical power P 2 for near vision, wherein the curvature of the walls in said zone and the index of refraction of the liquid being such that the lens has a power P 1 in said zone without liquid in the capillary volume and a power P 2 in the presence of said liquid in said capillary volume.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |