EP0012836B1 - Projecteur anti-éblouissant pour véhicules - Google Patents

Projecteur anti-éblouissant pour véhicules Download PDF

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Publication number
EP0012836B1
EP0012836B1 EP79104541A EP79104541A EP0012836B1 EP 0012836 B1 EP0012836 B1 EP 0012836B1 EP 79104541 A EP79104541 A EP 79104541A EP 79104541 A EP79104541 A EP 79104541A EP 0012836 B1 EP0012836 B1 EP 0012836B1
Authority
EP
European Patent Office
Prior art keywords
reflector
optical axis
horizontal
focal length
light
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
Application number
EP79104541A
Other languages
German (de)
English (en)
Other versions
EP0012836A1 (fr
Inventor
Heinz Droste
Franz Theyssen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Westfaelische Metall Industrie KG Hueck and Co
Original Assignee
Westfaelische Metall Industrie KG Hueck and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Westfaelische Metall Industrie KG Hueck and Co filed Critical Westfaelische Metall Industrie KG Hueck and Co
Publication of EP0012836A1 publication Critical patent/EP0012836A1/fr
Application granted granted Critical
Publication of EP0012836B1 publication Critical patent/EP0012836B1/fr
Expired legal-status Critical Current

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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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors

Definitions

  • Vehicle headlights with a long range and strong local lighting are known from DE-C-1 096 843.
  • a smaller reflector with a smaller focal length is inserted into a reflector of relatively large focal length, the focal point of which coincides with the focal point of the large reflector.
  • the large focal length reflector creates small spiral images which, thanks to their high light intensity, ensure far-reaching illumination of the street.
  • the reflector with the smaller focal length has a much smaller proportion of smaller helix images, so that its range is limited.
  • the reflector with a small focal length ensures better illumination of the near area in front of the vehicle and, due to the larger solid angle, shows better utilization of the light flux emitted by the light source.
  • DE-B-1 142 322 shows a further development of the headlamp described above with a paraboloid-shaped reflector, with an approximately rectangular light exit opening created by an upper and a lower horizontal flattening, and one arranged in this reflector above the horizontal plane passing through the optical axis second reflector with a shorter focal length and a smaller light outlet.
  • This inner reflector forms a section of a paraboloid of revolution open to the horizontal central plane of the outer reflector.
  • the shadow edge formed by the lateral edges of the inner reflector runs above the horizontal plane of the outer reflector which passes through the optical axis.
  • a headlight with a reflector is known, the light exit opening of which is rectangular through a horizontal upper and lower flattening.
  • a pot-shaped cover is placed over the bulb from the front, which is to prevent light from the bulb from emerging directly from the headlight and to provide shade for the upper and lower reflector flats.
  • the object of the invention is to provide a headlight with a large focal length reflector, the light exit opening is substantially rectangular and in which a second reflector with a smaller focal length is used to produce a better near light and in which the upper flattening and the transition between the flattening is shaded to the paraboloid surface without the need for a special cover.
  • the light-dark boundary of the light figure displayed on a wall in front of the headlight should be formed by the small spiral images falling out of the large focal length reflector, in order to get a sharp light-dark boundary and on the other hand, immediately below the Light-dark boundary to obtain a high light intensity.
  • the proportion of the light reflected by the smaller reflector to the proportion of the light reflected by the large reflector in the low beam should be kept such that there is a uniform luminance far in front of the vehicle.
  • the invention therefore relates to a low-beam headlamp for vehicles with a paraboloid-shaped reflector with an approximately rectangular light outlet opening created by an upper and lower horizontal flattening and a second reflector with a shorter focal length and a smaller light outlet opening arranged in this reflector above the horizontal plane passing through the optical axis.
  • a focal point is at least approximately in the focal point of the outer reflector and just before or in the beginning of the incandescent lamp filament and which forms a section of a paraboloid of revolution open to the horizontal central plane of the outer reflector, the lateral edges of which form a shadow edge which lies above the horizontal plane of the optical axis outer reflector runs.
  • the invention is characterized in that the lateral edges of the inner reflector each run in a plane which lies in the optical axis and forms an acute angle with the horizontal plane running in the optical axis, which is approximately at a focal length of the outer reflector of 60 mm Is 20 °, the upper horizontal flattening including the transition area to the parabolic reflection surface being shaded.
  • the luminance in front of the vehicle is very uniform from approximately 80 m to just in front of the vehicle. If the above-mentioned angle is significantly reduced, the brightness of the street area immediately in front of the vehicle increases Reichs, and the driver's eye is adapted to this area of the road.
  • the large focal length reflector 1 is pivotably mounted both horizontally and vertically in a receptacle firmly connected to the vehicle body.
  • This reflector 1, designed as a paraboloid of revolution, has a flattened area 2, 3 on its upper and lower side, so that a rectangular light emission results. Due to the large focal length of the reflector 1, it is necessary to insert a bulb holder 4 projecting far in the direction of the light emission so that the bulb 5 comes into the correct position for the focal point F of the reflector 1.
  • the incandescent lamp 5 is arranged in the reflector 1 in such a way that the incandescent filament 6 for the high beam with its forward-facing end is arranged in the focal point F and the incandescent filament 8 with a dipped cap 7 for the low beam is arranged in front of the focal point F.
  • a further reflector 9 is inserted into the reflector 1, the focal point of which lies at or approximately in the focal point F of the reflector 1.
  • This reflector 9 has a much smaller focal length than the reflector 1. It is pivotally attached with its apex region to the bulb holder 4 and is adjustably connected to the edge of the reflector 1 via a screw connection 10. By means of the screw connection 10, the reflector 9 can be adjusted and thus adjusted within the reflector 1.
  • the inner reflector 9 is only a section of a rotational paraboloid. It has an opening to the horizontal plane 12 passing through the optical axis 11.
  • the circumferential angle ⁇ of the inner reflector 9 is so large that the transition regions 14 of the parabolic reflection surface 13 to the upper flattening 3 are shaded. However, the circumferential angle ⁇ is not so large that the reflection surface 13 is covered down to the horizontal plane 12. With such a far-reaching coverage, the large focal length reflector 1 would have no effect, at least for the side of the low beam which has a horizontally extending light-dark boundary 15.
  • the lateral edges 16, 17 of the inner reflector 9 run in such planes 18, 19 that pass through the optical axis 11 and to the horizontal plane 12 passing through the optical axis 11, an angle lX of approximately Form 20 °.
  • the limiting or parking light 20 is introduced in the shaded area of the reflector 1.
  • the parts 21 and 22 of the light figure shown in FIG. 3 come from the large focal length reflector 1 and have a high light intensity.
  • the portion 23 of the light figure comes from the inner reflector 9. Because of the smaller focal length of this reflector compared to the reflector 1, the helix images are much larger. The smaller helix images from this small focal length reflector 9 lie below the cut-off line 24, 25 and become continuously larger at the bottom. This results in uniform illumination on the road from directly in front of the vehicle to approximately 80 m in front of the vehicle.
  • the inner reflector 9 In order to ensure that the portion 23 of the light figure does not go beyond the portions 21, 22 of the light figure, it is expedient to slightly incline the optical axis 11 of the inner reflector 9 with respect to the optical axis 11 of the outer reflector 1. In order to keep the dark hole 26 in the light figure as small as possible, it is also advantageous to arrange the inner reflector 9 in such a way that its focal point comes as close as possible to the end of the anti-glare filament 8 directed towards the high beam filament.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (4)

1. Feu de croisement pour véhicule, comportant un réflecteur en forme de paraboloïde (1) et présentant une ouverture de sortie de la lumière, approximativement rectangulaire créée par un aplatissement horizontal supérieur (3) et un aplatissement horizontal inférieur (2) et comprenant également un deuxième réflecteur (9), disposé dans ce premier réflecteur, au-dessus du plan horizontal (12) qui passe par l'axe optique, de plus faible distance focale, de plus faible ouverture de sortie de la lumière, dont le foyer se situe au moins approximativement au foyer (F) du réflecteur extérieur (1) et un peu en avant ou au début du filament de l'ampoule (8) et qui constitue une portion d'un paraboloïde, ouverte par rapport au plan horizontal médian (8) du réflecteur extérieur (1) et dont les bords latéraux (16, 17) forment la bordure d'une zone J'ombre qui court au-dessus du plan horizontal (12), passant par l'axe optique (11), du réflecteur extérieur (1), caractérisé en ce que les bords latéraux (16, 17) du réflecteur intérieur (9) se trouvent chacun dans un plan (18, 19) qui passe par l'axe optique (11), et qui forme avec le plan horizontal (12) qui passe par l'axe optique un angle aigu (a) qui pour une distance focale du réflecteur extérieur (1) de 60 mm atteint environ 20°, l'aplatissement horizontal supérieur (3) du réflecteur (1) y compris la zone de transition (14) avec la surface réfléchissante paraboloïde (13) étant alors occupée.
2. Feu selon la revendications 1, caractérisé en ce que l'axe optique (11) du réflecteur intérieur (9) est légèrement incliné par rapport à l'axe optique (11) du réflecteur extérieur (1).
3. Feu selon une ou plusieurs des revendications précédentes, caractérisé en ce que le réflecteur intérieur (9) est placé dans le réflecteur extérieur (1) avec possibilité de réglage.
4. Feu selon une ou plusieurs des revendications précédentes, caractérisé en ce que dans la zone du réflecteur extérieur (1) occupée par le réflecteur intérieur (9) est disposé le feu de position ou un autre feu supplémentaire (20).
EP79104541A 1978-12-28 1979-11-16 Projecteur anti-éblouissant pour véhicules Expired EP0012836B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2856448 1978-12-28
DE2856448A DE2856448C3 (de) 1978-12-28 1978-12-28 Abblendscheinwerfer für Fahrzeuge

Publications (2)

Publication Number Publication Date
EP0012836A1 EP0012836A1 (fr) 1980-07-09
EP0012836B1 true EP0012836B1 (fr) 1982-03-31

Family

ID=6058550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104541A Expired EP0012836B1 (fr) 1978-12-28 1979-11-16 Projecteur anti-éblouissant pour véhicules

Country Status (2)

Country Link
EP (1) EP0012836B1 (fr)
DE (1) DE2856448C3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3379800D1 (en) * 1982-10-15 1989-06-08 Carello Lighting Plc Road vehicle headlamp
FR2536502B1 (fr) * 1982-11-19 1987-01-09 Cibie Projecteurs Projecteur de croisement pour vehicule automobile
DE3405504A1 (de) * 1984-02-16 1985-08-29 Robert Bosch Gmbh, 7000 Stuttgart Scheinwerfer, insbesondere hauptscheinwerfer fuer kraftfahrzeuge

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1142322B (de) * 1960-04-20 1963-01-17 Pierre Cibie Scheinwerfer mit grosser Reichweite und starker Nahbeleuchtung
GB1208110A (en) * 1967-02-06 1970-10-07 Lucas Industries Ltd Vehicle lamps

Also Published As

Publication number Publication date
DE2856448A1 (de) 1980-07-03
DE2856448C3 (de) 1981-12-17
DE2856448B2 (de) 1981-04-16
EP0012836A1 (fr) 1980-07-09

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