FR2681443B1 - - Google Patents
Info
- Publication number
- FR2681443B1 FR2681443B1 FR9111455A FR9111455A FR2681443B1 FR 2681443 B1 FR2681443 B1 FR 2681443B1 FR 9111455 A FR9111455 A FR 9111455A FR 9111455 A FR9111455 A FR 9111455A FR 2681443 B1 FR2681443 B1 FR 2681443B1
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/04—Eye-masks ; Devices to be worn on the face, not intended for looking through; Eye-pads for sunbathing
- A61F9/06—Masks, shields or hoods for welders
- A61F9/065—Masks, shields or hoods for welders use of particular optical filters
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Nonlinear Science (AREA)
- Ophthalmology & Optometry (AREA)
- Biomedical Technology (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9111455A FR2681443A1 (fr) | 1991-09-12 | 1991-09-12 | Dispositif electro-optique de protection des yeux. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9111455A FR2681443A1 (fr) | 1991-09-12 | 1991-09-12 | Dispositif electro-optique de protection des yeux. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2681443A1 FR2681443A1 (fr) | 1993-03-19 |
| FR2681443B1 true FR2681443B1 (US08124630-20120228-C00102.png) | 1995-01-06 |
Family
ID=9417024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9111455A Granted FR2681443A1 (fr) | 1991-09-12 | 1991-09-12 | Dispositif electro-optique de protection des yeux. |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2681443A1 (US08124630-20120228-C00102.png) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005007048A1 (en) * | 2003-07-10 | 2005-01-27 | Lightswitch Safety Systems, Inc. | Light sensor arrangement for auto-darkening lenses and method |
| FR2909884B1 (fr) * | 2006-12-14 | 2014-08-22 | Eurofeedback Sa | Appareil de traitement par emission de flashs lumineux avec dispositif d'anti-eblouissement |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4279474A (en) * | 1980-03-25 | 1981-07-21 | Belgorod Barry M | Spectacle lens having continuously variable controlled density and fast response time |
| EP0091514B1 (de) * | 1982-04-14 | 1987-06-16 | André M. Eggenschwiler | Lichtschutzfilter, insbesondere für Schweissschutzschilder oder Schweissschutzbrillen |
| FR2530039A1 (fr) * | 1982-07-06 | 1984-01-13 | Cuvelier Antoine | Lunettes de protection a transmission reglable automatiquement utilisant des cristaux liquides |
| US4560239A (en) * | 1984-02-29 | 1985-12-24 | Amnon Katz | Liquid crystal active light shield |
-
1991
- 1991-09-12 FR FR9111455A patent/FR2681443A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2681443A1 (fr) | 1993-03-19 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |