GB390611A - Improvements in devices or means for preventing dazzling effects due to motor-car head-lamps and the like - Google Patents
Improvements in devices or means for preventing dazzling effects due to motor-car head-lamps and the likeInfo
- Publication number
- GB390611A GB390611A GB4797/32A GB479732A GB390611A GB 390611 A GB390611 A GB 390611A GB 4797/32 A GB4797/32 A GB 4797/32A GB 479732 A GB479732 A GB 479732A GB 390611 A GB390611 A GB 390611A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- vehicle
- layers
- lamp
- spectacles
- Prior art date
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
- F21S41/135—Polarised
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
390,611. Vehicle antidazzle screens ; lighting systems ; spectacles. UNDERWOOD, E. N., 121, St. Peter's Street, Derby. July 29, 1932, No. 4797. [Class 103 (ii).] For protecting vehicle drivers from dazzle by the headlights of approaching vehicles, the lamp lenses and windscreens are constructed of a number of layers of transparent material, the surfaces of which are inclined at the angle of polarization to the surface of the lens or screen as a whole, the lamp lens serving as a polarizer and the windscreen as an analyser. In constructing the lens or screen a number of layers f of glass, celluloid or other selected transparent material united by cement g are cut at the polarizing angle y into layers h of suitable thickness and, if desired, mounted between two plane sheets of glass. When the lens is mounted in the lamp the reflected rays serve to illuminate the side of the road, while the refracted rays are projected forward, to be rejected by the windscreen of an approaching vehicle. Rear windows and driving mirrors may be similarly constructed to prevent dazzle by lights at the rear of a vehicle. The plane of polarization is preferably arranged at 45‹ to the vertical. Spectacles for pedestrians or other road users may be provided with lenses built up in a similar manner.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4797/32A GB390611A (en) | 1932-07-29 | 1932-07-29 | Improvements in devices or means for preventing dazzling effects due to motor-car head-lamps and the like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4797/32A GB390611A (en) | 1932-07-29 | 1932-07-29 | Improvements in devices or means for preventing dazzling effects due to motor-car head-lamps and the like |
Publications (1)
Publication Number | Publication Date |
---|---|
GB390611A true GB390611A (en) | 1933-04-13 |
Family
ID=9783963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4797/32A Expired GB390611A (en) | 1932-07-29 | 1932-07-29 | Improvements in devices or means for preventing dazzling effects due to motor-car head-lamps and the like |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB390611A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2453379A (en) * | 1943-09-28 | 1948-11-09 | Alvin M Marks | Multiply angle selective polarizer |
US2492809A (en) * | 1938-11-16 | 1949-12-27 | Alvin M Marks | Unitary multiply polarizer |
GB2287005A (en) * | 1994-03-04 | 1995-09-06 | Mondialpatents S R L | Anti-dazzle glass and lighting system for motor vehicles |
-
1932
- 1932-07-29 GB GB4797/32A patent/GB390611A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2492809A (en) * | 1938-11-16 | 1949-12-27 | Alvin M Marks | Unitary multiply polarizer |
US2453379A (en) * | 1943-09-28 | 1948-11-09 | Alvin M Marks | Multiply angle selective polarizer |
GB2287005A (en) * | 1994-03-04 | 1995-09-06 | Mondialpatents S R L | Anti-dazzle glass and lighting system for motor vehicles |
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