EP0215035A1 - Headlamp for dipped lights or fog lights for motor vehicles. - Google Patents
Headlamp for dipped lights or fog lights for motor vehicles.Info
- Publication number
- EP0215035A1 EP0215035A1 EP86901342A EP86901342A EP0215035A1 EP 0215035 A1 EP0215035 A1 EP 0215035A1 EP 86901342 A EP86901342 A EP 86901342A EP 86901342 A EP86901342 A EP 86901342A EP 0215035 A1 EP0215035 A1 EP 0215035A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lens
- lenses
- correction element
- light
- optical axis
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims description 13
- 230000004075 alteration Effects 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 3
- 244000309466 calf Species 0.000 claims 2
- 230000005855 radiation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- F21S41/25—Projection lenses
- F21S41/255—Lenses with a front view of circular or truncated circular outline
-
- 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
Definitions
- the invention relates to a headlamp for low beam or fog light of motor vehicles according to the preamble of claim 1.
- a headlamp is known for example from DE-OS 33 34 450, the lens of which must have a large relative opening so that the light beam on the one hand sufficiently wide and on the other hand, their edges are still sufficiently illuminated.
- the dispersion of the light rays, i.e. H. the color separation of the light beam, in particular by the lens causes a color fringe at the light-dark boundary; this due to color locus errors, d. H. chromatic aberration, caused color fringe is disturbing; moreover, such a light beam does not comply with the legal requirements.
- At least two lenses are used as the objective, at least one of which has a negative refractive power.
- Such a multi-part lens causes considerable technical Manufacturing expense that is unacceptable for automotive headlights.
- FIG. 1 shows a schematic, perspective illustration of a headlight for low beam of motor vehicles
- Figure 2 shows the principle of the first embodiment in a scale
- Figure 3 shows the principle of the second embodiment, also in an unscaled representation
- Figure 4 shows a first variant of a correction element in a spatial representation according to the second embodiment
- FIG. 5 shows a second variant in a spatial representation of the second embodiment.
- a headlight for low beam of motor vehicles has a reflector 10, a light source 11 unfocused with respect to its focal point and an optical axis 12.
- the rays generated by the light source 11 form a light beam 18 by reflection on the reflector 10;
- the following are arranged in its beam path: an aperture 13 with a bent edge 1 4, in front of it a non-color-corrected lens 15 (with chromatic aberration) and in front of it a correction element 16 represented only by a disk.
- the light beam 18 emitted by the reflector 10 produces a light spot with a light-dark boundary (HDG), which has a horizontal branch 19 and a branch 20 that rises by 15 degrees. If the correction element 16 were not present, a color fringe 21, which has a disturbing effect, would be caused on the HDG 19, 20 by color location errors (chromatic aberration). On the other hand, if the correction element 16 is located in the beam path of the light bundle 18, the HDG 19, 20 does not have this disturbing color fringe 21.
- HDG light-dark boundary
- the correction element 16 in FIG. 2 consists of an upper cylindrical half lens 22 and a lower cylindrical half lens 23, the vertical section of which corresponds to a converging or diverging lens. Both half lenses 22, 23 refract the light rays downwards, the refraction of the lower half lenses 23 and that of the upper half lens 22 being different.
- the optical axis of both half lenses 22, 23 is identical to the optical axis of the lens 15, which in turn is identical to the optical axis 12 of the headlamp.
- the surface lines of the surface 24 of the upper half lens 22 and that of the surface 25 of the lower half lens 23 are arranged parallel and horizontally to one another. Both waiters Surfaces 24, 25 meet in a connection point 26, which contains the optical axis 12 and which lies in a plane 27 perpendicular to this axis, the two surfaces 24, 25 tangentially touching the plane 27.
- correction element 16 The effect of the correction element 16 is described on the basis of three beams 28, 29 and 30 of the light bundle 18:
- Near-axis rays are almost unaffected by the non-color corrected lens 15 and the correction element 16 and form the HDG 19, 20 of the light bundle 18 without a color fringe.
- the ray 29 remote from the axis is refracted and fanned out (dispersed) between as it passes through the lens 15 its red radiation component 31 and its blue radiation component 32.
- the beam 29 - at least its red radiation component 31 - would strike the measuring screen 17 above the HDG 19, 20 in the so-called dark area; the upper half lens 22 of the correction element 16, however, directs the beam 29 at least on or below the HDG 19, 20 and thus into the bright area of the light beam 18.
- the upper half lens 22 of the correction element 16 directs the beam 30 near the edge, which is most strongly refracted and fanned out, in such a way that its red beam component 31 also at least on or below the HDG 19, 20 in the bright area of the light beam 18 falls.
- the beam 28, which is remote from the axis, is likewise refracted by the lens 15 and fanned out into its red and blue beam components 31, 32.
- the half-lens 23 of the correction element 16 directs the beam 28 downwards at least so far that its blue radiation component 32 also falls under the HDG 19, 20 in the bright area of the light beam 18.
- the correction element 16 therefore directs all the rays forming a color fringe 21 (FIG. 1) and subject to the color locus error into the bright area of the light bundle 18, where they mix,
- a variant, not shown, of the exemplary embodiment according to FIG. 2 is that the upper and lower half-lenses of the correction element are rotationally symmetrical.
- the rising branch 20 of the HDG closes with the horizontal branch 19-d. H. with the horizontal 34 - an angle of 15 degrees.
- the surface lines of the surface of that lens half, which form the rising branch 20 are preferably inclined by half the pitch angle (15 degrees) to the horizontal 34.
- the correction element 36 of the second exemplary embodiment in FIG. 3 breaks down the light bundle emerging from the objective 15, which symbolize the boundary rays 37, 38, into differential light bundles, i. H. in very many small bundles of light 39; these overlap each other and unite on the measuring screen 17 if the light beam emerging from the lens 15 is monochrome.
- the HDG 19, 20 of the polychromatic light beam, not shown, is white with a slight color.
- the correction element 16 'in FIG. 4 has an essentially flat side 40 facing the objective 15 and a side with a plurality of cylindrical lenses 41 which touch one another and whose surface lines of the surfaces are arranged parallel and horizontally to one another.
- the correction element 16 ′′ in FIG. 5 is a variant of the element 16 ′ and also has a flat side 40 and ring lenses 42 which are rotationally symmetrical to the axis of the objective 15 and thus to the axis 12 of the headlight and touch one another.
- Both the cylindrical lenses 4 1 and the ring lenses 42 can be designed as converging lenses or diverging lenses with different refractive powers and / or widths. Furthermore, these lenses only need to partially cover the usable area of the correction element 16 'or 16 ".
- the correction element can have a combination of lenses according to one of Claims 3 to 5 and 8 to 11.
- the lens and the correction element can be produced in one piece, not shown, in particular the side of the lens with the correction element being produced by pressing.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Le phare possède un objectif (15) non corrigé en couleurs, qui reproduit le bord du filtre (14) comme frontière clair/obscur (19, 20) du faisceau lumineux (18) sur la chaussée, et un élément de correction (16) qui dirige les rayons du faisceau lumineux (18) qui forment une frange colorée à la frontière clair/obscur (19, 20) dans la zone de clarté du faisceau. Ainsi est réalisé, sans l'inconvénient de la frange colorée, le faisceau lumineux (18) blanc prescrit par le législateur.The headlight has an objective (15) not corrected in color, which reproduces the edge of the filter (14) as light / dark border (19, 20) of the light beam (18) on the roadway, and a correction element (16) which directs the rays of the light beam (18) which form a colored fringe at the light / dark border (19, 20) in the beam clarity area. Thus is achieved, without the disadvantage of the colored fringe, the white light beam (18) prescribed by the legislator.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3507013 | 1985-02-28 | ||
DE19853507013 DE3507013A1 (en) | 1985-02-28 | 1985-02-28 | HEADLIGHTS FOR LOW BEAM OR FOG LIGHTS OF MOTOR VEHICLES |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0215035A1 true EP0215035A1 (en) | 1987-03-25 |
EP0215035B1 EP0215035B1 (en) | 1989-12-20 |
Family
ID=6263762
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86901342A Expired EP0215035B1 (en) | 1985-02-28 | 1986-02-18 | Headlamp for dipped lights or fog lights for motor vehicles |
Country Status (5)
Country | Link |
---|---|
US (1) | US4771372A (en) |
EP (1) | EP0215035B1 (en) |
JP (1) | JPH07118204B2 (en) |
DE (2) | DE3507013A1 (en) |
WO (1) | WO1986005254A1 (en) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4825343A (en) * | 1985-12-27 | 1989-04-25 | Ichikoh Industries Limited | Projector type headlamp for vehicles |
JPH0731921B2 (en) * | 1988-01-20 | 1995-04-10 | 市光工業株式会社 | Projector headlight |
JPH0531766Y2 (en) * | 1988-11-16 | 1993-08-16 | ||
JP2754690B2 (en) * | 1989-03-31 | 1998-05-20 | 市光工業株式会社 | Projector type headlight |
JPH0817044B2 (en) * | 1989-12-28 | 1996-02-21 | 株式会社小糸製作所 | Vehicle headlights |
US5068768A (en) * | 1990-03-28 | 1991-11-26 | Koito Manufacturing Co., Ltd. | Variable light distribution type automobile lamp |
US5138540A (en) * | 1990-04-24 | 1992-08-11 | Koito Manufacturing Co., Ltd. | Variable light distribution type headlamp |
JP2674913B2 (en) * | 1991-11-18 | 1997-11-12 | 松下電器産業株式会社 | Lighting equipment |
JP2707391B2 (en) * | 1992-09-01 | 1998-01-28 | 株式会社小糸製作所 | Projector type headlight |
US5938323A (en) * | 1996-05-24 | 1999-08-17 | Cooper Automotive Products, Inc. | Projector light assembly |
US9092841B2 (en) * | 2004-06-09 | 2015-07-28 | Cognex Technology And Investment Llc | Method and apparatus for visual detection and inspection of objects |
DE10333370A1 (en) | 2003-07-23 | 2005-02-24 | Schott Ag | Lighting device, lens and lens manufacturing |
DE102008021520B4 (en) | 2008-04-30 | 2016-01-28 | Automotive Lighting Reutlingen Gmbh | Projection lens with color fringe correction for a vehicle headlight, projection module and vehicle headlight with such a projection lens |
JP5445923B2 (en) * | 2009-09-04 | 2014-03-19 | スタンレー電気株式会社 | Vehicle lighting |
JP5516854B2 (en) * | 2009-10-08 | 2014-06-11 | スタンレー電気株式会社 | Vehicle lighting |
DE102011075510A1 (en) | 2011-05-09 | 2012-11-15 | Automotive Lighting Reutlingen Gmbh | Light module for a motor vehicle headlight for generating a variable light distribution and motor vehicle headlights with such a light module |
WO2015020555A1 (en) * | 2013-08-08 | 2015-02-12 | Sapt Georgiy Pavlovich | Vehicle light |
US9822942B2 (en) * | 2013-11-12 | 2017-11-21 | Ledil Oy | Low-beam headlight element for a vehicle |
JP2017004661A (en) | 2015-06-08 | 2017-01-05 | スタンレー電気株式会社 | Vehicle lamp |
DE102015015360A1 (en) * | 2015-11-27 | 2017-06-01 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Headlight for a motor vehicle |
DE202016105880U1 (en) * | 2016-10-19 | 2018-01-22 | BÄ*RO GmbH & Co. KG | lighting device |
WO2023187505A1 (en) * | 2022-03-07 | 2023-10-05 | 손성근 | Lighting device for vehicle |
KR102419832B1 (en) * | 2022-03-07 | 2022-07-11 | 손성근 | Automotive Lighting Device |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE429125A (en) * | 1938-07-13 | 1938-08-31 | Acec | Low oil volume circuit breaker |
FR865616A (en) * | 1939-05-22 | 1941-05-29 | Headlight for motor vehicles, with anti-diffusive, anti-glare and anti-fog action | |
US2578962A (en) * | 1941-05-09 | 1951-12-18 | Hartford Nat Bank & Trust Co | Vehicle lamp with an optical system for uniform road lighting |
US3291976A (en) * | 1964-05-19 | 1966-12-13 | Hughes Aircraft Co | Illumination system |
US3708221A (en) * | 1970-04-02 | 1973-01-02 | Anchor Hocking Corp | Aspheric lens and method of manufacture |
DE2636137A1 (en) * | 1976-08-11 | 1978-02-16 | Thorn Electrical Ind Ltd | Colour fringing in lamps suppression method - uses mask between light source and projector lens to define cutoff in projected beam |
DE2720956C2 (en) * | 1977-05-10 | 1982-12-02 | Bayerische Motoren Werke AG, 8000 München | Motor vehicle headlights for low and high beam |
IT1144157B (en) * | 1981-03-09 | 1986-10-29 | Wabco Westinghouse Comp Italia | TRAFFIC SIGNALING DEVICE ESPECIALLY FOR RAILWAY SIGNALING |
FR2503832B1 (en) * | 1981-04-14 | 1986-04-04 | Cibie Projecteurs | MOTOR VEHICLE PROJECTOR WITH NARROW OUTPUT WINDOW |
FR2550847B1 (en) * | 1983-08-18 | 1988-07-01 | Cibie Projecteurs | ELLIPTICAL REFLECTOR WITH CUT BEAM FOR MOTOR VEHICLE |
DE3417034A1 (en) * | 1984-05-09 | 1985-11-14 | Robert Bosch Gmbh, 7000 Stuttgart | HEADLIGHTS, IN PARTICULAR LOW BEAM HEADLIGHTS, FOR MOTOR VEHICLES |
-
1985
- 1985-02-28 DE DE19853507013 patent/DE3507013A1/en not_active Withdrawn
-
1986
- 1986-02-18 JP JP61501184A patent/JPH07118204B2/en not_active Expired - Lifetime
- 1986-02-18 DE DE8686901342T patent/DE3667717D1/en not_active Expired - Lifetime
- 1986-02-18 EP EP86901342A patent/EP0215035B1/en not_active Expired
- 1986-02-18 US US06/931,446 patent/US4771372A/en not_active Expired - Fee Related
- 1986-02-18 WO PCT/DE1986/000059 patent/WO1986005254A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO8605254A1 * |
Also Published As
Publication number | Publication date |
---|---|
US4771372A (en) | 1988-09-13 |
DE3507013A1 (en) | 1986-08-28 |
JPH07118204B2 (en) | 1995-12-18 |
WO1986005254A1 (en) | 1986-09-12 |
JPS62502577A (en) | 1987-10-01 |
DE3667717D1 (en) | 1990-01-25 |
EP0215035B1 (en) | 1989-12-20 |
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