GB1439011A - Longrange headlamp - Google Patents
Longrange headlampInfo
- Publication number
- GB1439011A GB1439011A GB3173973A GB3173973A GB1439011A GB 1439011 A GB1439011 A GB 1439011A GB 3173973 A GB3173973 A GB 3173973A GB 3173973 A GB3173973 A GB 3173973A GB 1439011 A GB1439011 A GB 1439011A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- illumination
- axis
- reflector
- shape
- 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
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/28—Cover glass
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
1439011 Vehicle headlamps CIBIE PROJECTEURS 3 July 1973 [5 July 1972] 31739/73 Heading F4R A vehicle headlamp comprises a parabolic reflector, a bulb having a cylindrical filament centred on the reflector axis on either side of the focus, and a lens 10 which has at least one refractory surface 28 which lies on the surface of a cone whose axis coincides with the reflector axis, thus forming with the other side of the lens a curved prism which deflects the reflected light rays to give a non-circular shape to the isocandelas of the lamp beam. The angle which the part-conical refracting surface makes with the other side of the lens is sufficiently small to ensure that the light rays are deflected by the surface 28 less than an amount which would diminish the illumination intensity along the reflector axis. This is illustrated by Fig. 5 in which the surface 28 deflects a notional illumination area ABCD to A<SP>1</SP>B<SP>1</SP>C<SP>1</SP>D<SP>1</SP>, the deflection not being so great as to reduce the light passing through the axis at O. the illumination at O thus remaining constant. In the example shown, the part-conical surfaces 28 are grouped in four sectors 16, 18, 20, 22 which give respective light beam deflection of 4 degrees 30 minutes in the directions of the arrows d to flatten the equal illumination curves into atrapezoidal shape, Fig. 6 (not shown). The groups of protrusions 28, which may be formed integrally with the remainder of the lens or separately adhered thereto, are separated from one another by a relative narrow horizontal non-deflecting strip 24 and by a relatively wide vertical diffusion strip 26. By suitable arrangement of the protrusions 28 equal illumination curves of other, e.g. rectangular, shape may be produced.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7224286A FR2191067B1 (en) | 1972-07-05 | 1972-07-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1439011A true GB1439011A (en) | 1976-06-09 |
Family
ID=9101379
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3173973A Expired GB1439011A (en) | 1972-07-05 | 1973-07-03 | Longrange headlamp |
Country Status (6)
Country | Link |
---|---|
DE (1) | DE2330254C3 (en) |
ES (1) | ES416162A1 (en) |
FR (1) | FR2191067B1 (en) |
GB (1) | GB1439011A (en) |
IT (1) | IT990865B (en) |
YU (1) | YU35981B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108644734A (en) * | 2018-05-11 | 2018-10-12 | 广州安亿仕汽车配件有限公司 | Distance-light switches lens and lighting apparatus |
CN109952229A (en) * | 2016-11-07 | 2019-06-28 | 标致雪铁龙汽车股份有限公司 | Motor vehicles signal lamp |
-
1972
- 1972-07-05 FR FR7224286A patent/FR2191067B1/fr not_active Expired
-
1973
- 1973-06-14 DE DE2330254A patent/DE2330254C3/en not_active Expired
- 1973-06-22 ES ES416162A patent/ES416162A1/en not_active Expired
- 1973-07-02 IT IT26095/73A patent/IT990865B/en active
- 1973-07-03 GB GB3173973A patent/GB1439011A/en not_active Expired
- 1973-07-03 YU YU1815/73A patent/YU35981B/en unknown
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109952229A (en) * | 2016-11-07 | 2019-06-28 | 标致雪铁龙汽车股份有限公司 | Motor vehicles signal lamp |
CN109952229B (en) * | 2016-11-07 | 2022-07-22 | 标致雪铁龙汽车股份有限公司 | Signal lamp for motor vehicle |
CN108644734A (en) * | 2018-05-11 | 2018-10-12 | 广州安亿仕汽车配件有限公司 | Distance-light switches lens and lighting apparatus |
CN108644734B (en) * | 2018-05-11 | 2020-12-04 | 广州安亿仕汽车配件有限公司 | Far and near light switching lens and lighting equipment |
Also Published As
Publication number | Publication date |
---|---|
FR2191067B1 (en) | 1975-03-07 |
DE2330254A1 (en) | 1974-01-24 |
ES416162A1 (en) | 1976-03-01 |
FR2191067A1 (en) | 1974-02-01 |
DE2330254B2 (en) | 1974-04-25 |
DE2330254C3 (en) | 1974-11-21 |
YU181573A (en) | 1981-04-30 |
IT990865B (en) | 1975-07-10 |
YU35981B (en) | 1981-11-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |