EP0075786B1 - Projecteur, en particulier pour véhicules automobiles - Google Patents
Projecteur, en particulier pour véhicules automobiles Download PDFInfo
- Publication number
- EP0075786B1 EP0075786B1 EP82108538A EP82108538A EP0075786B1 EP 0075786 B1 EP0075786 B1 EP 0075786B1 EP 82108538 A EP82108538 A EP 82108538A EP 82108538 A EP82108538 A EP 82108538A EP 0075786 B1 EP0075786 B1 EP 0075786B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- axis
- sectors
- horizontal
- sector
- reflector
- 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
Images
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
- F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
- F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
- F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
Definitions
- the invention is based on a headlamp, in particular for motor vehicles, according to the first part of claim 1.
- a headlamp is known from DE-A No. 2826307, whose paraboloid-shaped horizontal sector concentrates the proportion of light beams of relatively high intensity in the far area of the road while the upper and lower sectors with a smaller focal length illuminate the near area of the road with a relatively large luminous flux.
- the features set out in the characterizing part of claim 1 solve the problem set out in the above prior art using technically simple means.
- the portion of the light beam that conventionally illuminates the near area of the roadway is raised and used for illuminating the far area, namely over a relatively large width or in the area of the low-light limit of the low beam.
- the road is also adequately illuminated even when cornering.
- FIG. 1 and 2 show a so-called rectangular spotlight, a rectangular reflector 101, the reflection surface of which consists of a horizontal central sector 102 and an upper and lower sector 103, 104.
- the center sector 102 is arranged symmetrically to the horizontal meridian section plane 105 and is part of a paraboloid of revolution with a relatively large focal length.
- the two sectors 103, 104 are symmetrical to the vertical meridian section plane 106 and are part of an envelope, the vertical section of which is a parabola and the horizontal section of which is an ellipse. Both sectors 103, 104 delimit a section 107 parallel to the horizontal meridian section plane 105.
- the middle sector 102 and both sectors 103, 104 connect flat surfaces 108 which are arranged radially with respect to the optical axis 109 of the reflector 101.
- an opening 110 has been cut out for receiving an incandescent lamp (not shown) with a luminous element for generating a light beam.
- intersection curves resulting from the intersection of planes perpendicular to the axis 109 of the reflector 101 with the reflection surface of the upper and lower sectors 103, 104 are ellipse segments whose semiaxes are perpendicular to the axis 109 of the reflector and whose semiaxis of the ellipse lies in the horizontal central plane.
- the left and right halves of the upper and lower sectors 103, 104 which result from the intersection of the upper and lower sectors with the vertical meridian section plane 106, are slightly unfolded about the axis 111 which is arranged at right angles to the horizontal meridian section plane 105 and through the reflector apex goes (z-axis).
- the horizontal meridian section of the envelope is a hyperbola
- the left and right halves of the upper and lower sectors 103, 104 which result from the intersection of both sectors with the vertical meridian section plane 106, are slightly folded over one another about the axis 111 that is perpendicular to the horizontal meridian section plane 105 is arranged and goes through the reflector apex (z-axis).
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Claims (4)
caractérisé en ce que
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3138641 | 1981-09-29 | ||
DE3138641 | 1981-09-29 | ||
DE3139943 | 1981-10-08 | ||
DE19813139943 DE3139943A1 (de) | 1981-09-29 | 1981-10-08 | Scheinwerfer, insbesondere scheinwerfer fuer kraftfahrzeuge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0075786A1 EP0075786A1 (fr) | 1983-04-06 |
EP0075786B1 true EP0075786B1 (fr) | 1985-04-10 |
Family
ID=25796412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82108538A Expired EP0075786B1 (fr) | 1981-09-29 | 1982-09-16 | Projecteur, en particulier pour véhicules automobiles |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0075786B1 (fr) |
DE (2) | DE3139943A1 (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2545152B1 (fr) * | 1983-04-27 | 1985-08-16 | Cibie Projecteurs | |
DE3380703D1 (en) * | 1983-05-10 | 1989-11-16 | Corning Glass Works | Automotive headlight having optics in the reflector |
DE3405504A1 (de) * | 1984-02-16 | 1985-08-29 | Robert Bosch Gmbh, 7000 Stuttgart | Scheinwerfer, insbesondere hauptscheinwerfer fuer kraftfahrzeuge |
DE3531223A1 (de) * | 1985-08-31 | 1987-03-05 | Bosch Gmbh Robert | Scheinwerfer, insbesondere rechteckscheinwerfer, fuer abblendlicht von kraftfahrzeugen |
FR2600024B1 (fr) * | 1986-06-17 | 1988-10-21 | Cibie Projecteurs | Projecteur additionnel a un projecteur de croisement pour vehicule automobile |
DE3627696C2 (de) * | 1986-08-14 | 1995-07-27 | Bosch Gmbh Robert | Mehrteiliger Reflektor für einen Abblendlicht-Scheinwerfer für Kraftfahrzeuge |
JP2517368B2 (ja) * | 1988-09-27 | 1996-07-24 | 株式会社小糸製作所 | 自動車用前照灯及び自動車用前照灯装置 |
JP3163569B2 (ja) * | 1992-02-18 | 2001-05-08 | 株式会社小糸製作所 | 自動車用ヘッドランプ |
DE19745467A1 (de) | 1997-10-15 | 1999-04-22 | Bosch Gmbh Robert | Scheinwerfer für Fahrzeuge |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1559212A (en) * | 1920-05-03 | 1925-10-27 | Winston Overton | Reflector for headlights |
DE1142322B (de) * | 1960-04-20 | 1963-01-17 | Pierre Cibie | Scheinwerfer mit grosser Reichweite und starker Nahbeleuchtung |
DE1156727B (de) * | 1960-07-19 | 1963-11-07 | Pierre Cibie | Reflektor fuer Kraftfahrzeug-Scheinwerfer |
GB2000266B (en) * | 1977-06-17 | 1982-01-27 | Lucas Industries Ltd | Lamp reflector for a motor vehicle |
-
1981
- 1981-10-08 DE DE19813139943 patent/DE3139943A1/de not_active Withdrawn
-
1982
- 1982-09-16 DE DE8282108538T patent/DE3263003D1/de not_active Expired
- 1982-09-16 EP EP82108538A patent/EP0075786B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE3263003D1 (en) | 1985-05-15 |
EP0075786A1 (fr) | 1983-04-06 |
DE3139943A1 (de) | 1983-04-14 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 19820916 |
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Owner name: STUDIO JAUMANN |
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