US4842400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual apparatus
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1988-07-06
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Granted: 1989-06-27
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Expires: 2008-07-06
Abstract
Abstract The visual apparatus makes it possible to limit the instantaneous luminous intensity without reducing the field of vision and comprises a plate with an opaque surface having a transparent slot, a support (2) on which said plate is mounted, said support bearing on part of the body of said person, said plate thus being placed in front of an eye of said person and a scanning means (8) connected to said plate for scanning the opaque surface of said plate by said transparent slot. The apparatus is used more particularly as medical spectacles in the case of cataracts, or as sunglasses.
Inventors
- 👤 Siegfried Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:09
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/10; G02C7/101; A; A61; A61F; A61F9/00; A61F9/02; A61F9/022; A61F9/023
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
83 words
Visual apparatus to be worn in front of the eyes of a person, characterized in that it comprises a plate having an opaque surface provided with a transparent slot, a support (2) on which is mounted said plate, the support bearing on part of the body of said person, said plate being placed in front of the eye of said person and a scanning means (8) connected to the plate for scanning the opaque surface of said plate by the said transparent slot.
Claim 2
Dependent Claim
83 words
Visual apparatus to be worn in front of the eyes of a person, characterized in that it comprises a plate having an opaque surface provided with a transparent slot, a support (2) on which is mounted said plate, the support bearing on part of the body of said person, said plate being placed in front of the eye of said person and a scanning means (8) connected to the plate for scanning the opaque surface of said plate by the said transparent slot.
Claim 3
Dependent Claim
67 words
Apparatus according to claim 1, characterized in that the visual apparatus comprises another plate (6) having an opaque surface provided with a transparent slot, said other plate being mounted on said support so that it is located in front of the other eye of said person, said scanning means being connected to said other plate for scanning the surface of said other plate by said transparent slot.
Claim 4
Dependent Claim
60 words
Apparatus according to claim 1, characterized in that each plate is a cell constituted by two transparent walls between which is arranged an optical material, whose transparency is electrically controllable, each cell having electrodes disposed on the inner faces of the transparent walls defining controllable zones (14) shaped like a slot, said electrodes receiving electrical signals from said scanning means.
Claim 5
Dependent Claim
16 words
Apparatus according to claim 3, characterized in that the optical material is a liquid crystal film.
Claim 6
Dependent Claim
37 words
Apparatus according to claim 1, characterized in that each plate (4,6) is an opaque disk provided with a slot (34) following a diameter of the disk and the scanning means (8) controls the rotation of the disk.
Claim 7
Dependent Claim
37 words
Apparatus according to claim 1, characterized in that each plate is substantially rectangular, the opaque surface being formed by a membrane (32) having a slot (34) and the scanning means (8) controls the translation of the membrane.
Claim 8
Dependent Claim
14 words
Apparatus according to claim 1, characterized in that said support is a spectacle frame.
Claim 9
Dependent Claim
32 words
Apparatus according to claim 1, characterized in that the scanning frequency of the opaque surface by the transparent slot is fixed by the scanning means (8) at a frequency exceeding 16 Hz.
Claim 10
Dependent Claim
60 words
Apparatus according to claim 2, characterized in that each plate is a cell constituted by two transparent walls between which is arranged an optical material, whose transparency is electrically controllable, each cell having electrodes disposed on the inner faces of the transparent walls defining controllable zones (14) shaped like a slot, said electrodes receiving electrical signals from said scanning means.
Claim 11
Dependent Claim
16 words
Apparatus according to claim 9, characterized in that the optical material is a liquid crystal film.
Claim 12
Dependent Claim
37 words
Apparatus according to claim 2, characterized in that each plate (4,6) is an opaque disk provided with a slot (34) following a diameter of the disk and the scanning means (8) controls the rotation of the disk.
Claim 13
Dependent Claim
37 words
Apparatus according to claim 2, characterized in that each plate is substantially rectangular, the opaque surface being formed by a membrane (32) having a slot (34) and the scanning means (8) controls the translation of the membrane.
Claim 14
Dependent Claim
14 words
Apparatus according to claim 2, characterized in that said support is a spectacle frame.
Claim 15
Dependent Claim
32 words
Apparatus according to claim 2, characterized in that the scanning frequency of the opaque surface by the transparent slot is fixed by the scanning means (8) at a frequency exceeding 16 Hz.
References Cited (Backward Citations)
FR563709A
Cited
FR852829A
Cited
FR1265417A
Cited
FR1288617A
Cited
FR2151623A5
Cited
US4012129A
Cited
WO1981002795A1
Cited
US4462661A
Cited
FR2530039A1
Cited
GB2128362A
Cited
GB2170613A
Cited
EP1131284A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |