EP0623780A2 - Lentille de projection pour phase de véhicule - Google Patents

Lentille de projection pour phase de véhicule Download PDF

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Publication number
EP0623780A2
EP0623780A2 EP94890077A EP94890077A EP0623780A2 EP 0623780 A2 EP0623780 A2 EP 0623780A2 EP 94890077 A EP94890077 A EP 94890077A EP 94890077 A EP94890077 A EP 94890077A EP 0623780 A2 EP0623780 A2 EP 0623780A2
Authority
EP
European Patent Office
Prior art keywords
optical axis
lens
horizontal plane
projection lens
section
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
Application number
EP94890077A
Other languages
German (de)
English (en)
Other versions
EP0623780A3 (fr
EP0623780B1 (fr
Inventor
Gert Krammer
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.)
ZKW Group GmbH
Original Assignee
Zizala Lichtsysteme GmbH
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 Zizala Lichtsysteme GmbH filed Critical Zizala Lichtsysteme GmbH
Publication of EP0623780A2 publication Critical patent/EP0623780A2/fr
Publication of EP0623780A3 publication Critical patent/EP0623780A3/fr
Application granted granted Critical
Publication of EP0623780B1 publication Critical patent/EP0623780B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/27—Thick lenses

Definitions

  • the invention relates to a vehicle headlight projection lens for generating a low beam pattern, in which the convex emission surface of the lens has different imaging sections, an upper section lying above the horizontal plane through the optical axis and a lower section lying below this horizontal plane being provided.
  • Such a projection lens is shown in DE-OS 36 02 262 for a headlight for low beam or fog light, which has an aperture covering the lower section of the reflector, the upper edge of which produces the light / dark boundary.
  • the rising upper boundary can preferably be arranged on one side of the vertical plane through the optical axis; it can touch the horizontal plane at a point which is the point of intersection of a horizontal beam with the emitting surface, which extends from the point of intersection of the optical axis with the incident surface of the lens facing the light source at an angle to the optical axis.
  • the angle between the horizontal beam and the optical axis is expediently between ⁇ 5 °.
  • the curvatures of the radiation surface in the vertical section through the lens from the horizontal plane through the optical axis can be to the respective Lens edge be flatter.
  • the length of the lens contour in the upper lens section can be greater than in the lower lens section.
  • the curvatures of the radiation surface in the lower section can be a mirror image with respect to the horizontal plane through the optical axis with respect to the curvatures in the upper section.
  • the lower section with increasing horizontal upper boundary is formed by rotating the horizontal section through the horizontal beam by 15 °, which is defined by the intersection curve of the vertical plane running through the horizontal beam with the radiation surface, the intersection curve of the horizontal plane through the optical axis with the radiation surface and the lens edge , a transition angle with a running curvature being provided between the twisted section and the remaining lower section.
  • the incident surface of the lens can be provided at right angles to the optical axis.
  • the lower boundary of the light irradiation surface can be arranged in the horizontal plane through the optical axis.
  • the lens body can extend essentially in the shape of a truncated pyramid or in the shape of a truncated cone from the irradiation surface to the radiation surface.
  • FIG. 1 shows an axonometric oblique bottom view
  • FIG. 2 shows a bottom view
  • FIG. 3 shows an end view (view of the radiation surface)
  • FIG. 4 shows a side view
  • 5 a vertical section through the optical axis
  • FIG. 6 a vertical section through the optical axis with beam path and Represent radiation imaging on a vertical plane 25 m in front of the lens with respect to a projection lens according to the invention.
  • the convex radiation surface of the lens 1 has an upper and three lower sections.
  • the upper section is delimited by the lens edge 2 and the lines A and B, of which A lies in the horizontal plane through the optical axis 3 and B rises to the lens edge at 7.5 ° with respect to the horizontal plane.
  • a lower section is delimited by A, the lens edge 2 and the line C; this is followed by a transition gusset which is delimited by line C, lens edge 2 and line D, and a further section which is delimited by line D, lens edge 2 and line B.
  • the lines A-D are not to be regarded as edges in the radiation area - although such an embodiment is possible - but as lines along which the curvature changes to the transition to the neighboring section.
  • a rectangle 5 perpendicular to the optical axis is provided as the lens irradiation surface, which sits with its lower edge centrally (point P) on the horizontal plane through the optical axis 3 and to which an optical fiber bundle can be coupled.
  • the light exit band 6 of the optical fiber bundle is - as indicated - vertically displaceable for the headlight range adjustment, which can take place by relative displacement between the light source and the light entry surface of the optical fiber bundle.
  • the line C and point 4 come about by cutting a vertical plane 7 through the point P, which is the point of intersection of the optical axis with the light entry surface 5 of the lens 1, with the emission surface of the lens.
  • the vertical plane 7 is inclined to the vertical plane through the optical axis 3 by approximately 3 to 5 °. From Fig. 3 it can be seen that line C is a curve on the radiation surface of the lens.
  • the imaginary section delimited by the line C, the lens edge 2 and the horizontal plane 8 by the optical axis 3 becomes the formation the so-called gusset with asymmetrical low beam is pivoted upward by 15 ° around the connecting line P4 as a pivot axis, as a result of which the CD and the pivoted imaginary section, with the upper section symmetrical with respect to the horizontal plane 8, form a surface intersection line B which is inclined by 7.5 ° to the horizontal plane .
  • the surface curvatures are chosen to pass smoothly.
  • the contour 0 of the upper half of the radiation surface is longer in vertical section than its lower contour U, i.e. the distance between the intersection of the optical axis with the radiation surface and the upper lens edge is greater than that between this intersection and the lower lens edge.
  • the angle of incidence included with the tangent normal of the respective surface point and ⁇ is the corresponding exit angle, taking into account that during the transition optically denser / optically thinner the plumb is broken, i.e. ⁇ .
  • the coordinates were determined on the basis of a lens length (distance between the irradiation surface and the intersection of the optical axis with the emission surface) of 90 mm and a lens height of 70 mm.
  • the lens height results from the numerical aperture of the light guide or the maximum opening angle of the light cone in the lens material, starting from the boundary of the incident surface; here about 55 °.
  • z is the coordinate of the respective point on the optical axis and y the distance of this point from the optical axis, each in mm.
  • the vertical cut contours are particularly important; the horizontal cut contours are not critical and can e.g. Be circular sections with flattened edge areas; this is regulated by the width of the desired light pattern and the required central illuminance.
  • the projection lens according to the invention does not have to be provided for irradiation via an optical fiber bundle; usual light sources / reflector combinations can also be provided.
  • the rear irradiation surface of the lens is designed accordingly.
  • the projection lens with a flat irradiation surface shown in Figs. 1-4 can e.g. can be used very well with a light source with an ellipsoid reflector.
  • a relative displacement between the light source and the light entry surface of the optical fiber bundle enables the light exit band on the light entry surface of the lens to be shifted for the headlight range adjustment.
  • This is particularly effective if the light guide transmits light bundled in parallel, since a sharp light band limitation can then be achieved in the optical fiber bundle.
  • the displacement of the light band across the cross section of the optical fiber bundle is particularly easy to implement in an arrangement in which at least one light source in the form of a flash lamp is moved past the inlet openings of successive optical fiber bundles.
  • the time of flash firing is the control factor for determining the position of the light band in the entry surface of the projection lens and thus the lighting range.
  • the light band limitation can also depend on the light exit surface of the light entry surface of the Optical fiber bundle passed reflector (eg 5 x 10 mm) and the gap between them (eg 0.1 mm) because the edge blur of the light band also decreases with a decreasing gap.
  • the light range becomes smaller the further the light band 6 of the lens entrance surface 5 of the lens 1 is from the horizontal plane 8 through the optical axis 3, i.e. the further it is in the upper half of the lens.
  • a film stack is preferred for the lens construction shown, the films of which lie on the light entry surface 5 of the lens 1 parallel to the horizontal plane 8 through the optical axis 3 and preferably have a thickness of 0.2 mm.
  • an at least one-dimensional strip order can be achieved in the light guide bundle, with different orders also being able to be provided within the individual strips.
  • the smallest possible angular resolution of the light exit angle of the light guide bundle is aimed for with a sharp light / dark edge, the angular resolution preferably not being constant over the bundle cross section. It is also preferred that the illuminance distribution over the bundle cross section is not constant.
  • the light entry surface of the lens is shown in the figures as rectangular and at right angles to the optical axis, it can be different in shape - e.g. be adapted to the light exit surface of light guide bundles of any cross section.
  • the projection lens according to the invention is furthermore not limited to feeding via optical fiber bundles; in particular not the solid lens of uniform cross section shown in the figures, which can also be illuminated using incandescent lamps / reflector combinations.
  • the light entry surface of the lens can be at an angle to the optical axis, e.g.
  • the light incident surface of the projection lens can also be particularly preferably a curved surface in order to achieve the greatest possible image sharpness.
  • the outer surfaces of the projection lens according to the invention - of course with the exception of the irradiation surface and the radiation surface - can be opaque to increase the light yield, especially coated white.
EP94890077A 1993-05-03 1994-05-02 Lentille de projection pour phase de véhicule Expired - Lifetime EP0623780B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT855/93 1993-05-03
AT0085593A AT400887B (de) 1993-05-03 1993-05-03 Fahrzeugscheinwerferprojektionslinse

Publications (3)

Publication Number Publication Date
EP0623780A2 true EP0623780A2 (fr) 1994-11-09
EP0623780A3 EP0623780A3 (fr) 1995-01-25
EP0623780B1 EP0623780B1 (fr) 1996-11-06

Family

ID=3501352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94890077A Expired - Lifetime EP0623780B1 (fr) 1993-05-03 1994-05-02 Lentille de projection pour phase de véhicule

Country Status (4)

Country Link
EP (1) EP0623780B1 (fr)
AT (1) AT400887B (fr)
DE (1) DE59400981D1 (fr)
ES (1) ES2094038T3 (fr)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0713052A1 (fr) * 1994-11-15 1996-05-22 Nippondenso Co., Ltd. Dispositif d'illumination pour véhicule automobile
EP0721085A1 (fr) * 1994-12-12 1996-07-10 Nippondenso Co., Ltd. Projecteur d'un véhicule
US5562335A (en) * 1993-06-16 1996-10-08 Nippondenso Co., Ltd. Lighting device for vehicles
US5574328A (en) * 1993-12-07 1996-11-12 Nippondenso Co., Ltd Light source apparatus
US5575551A (en) * 1994-05-31 1996-11-19 Nippondens Co., Ltd Illuminating device for vehicles
EP0762809A2 (fr) * 1995-09-12 1997-03-12 Nippondenso Co., Ltd. Dispositif à lampe à décharge
US5615090A (en) * 1994-12-21 1997-03-25 Nippondenso Co., Ltd. Headlight for vehicle
US5692823A (en) * 1995-01-31 1997-12-02 Nippondenso Co., Ltd. Illuminating device
US5697690A (en) * 1994-07-21 1997-12-16 Nippondenso, Ltd. Illuminating device for vehicles
US5730519A (en) * 1994-11-11 1998-03-24 Nippondenso Co., Ltd. Headlight for vehicle
US5921671A (en) * 1995-10-18 1999-07-13 Denso Corporation Light-distributing lens of head lamp for vehicles
WO1999047852A1 (fr) 1998-03-17 1999-09-23 Volkswagen Aktiengesellschaft Systeme d'eclairage, notamment pour vehicules automobiles
DE19813597A1 (de) * 1998-03-27 1999-09-30 Volkswagen Ag Beleuchtungseinrichtung. insbesondere Scheinwerfer nach dem Projektionsprinzip für Kraftfahrzeuge
EP1008800A3 (fr) * 1998-12-12 2001-10-17 Hella KG Hueck & Co. Phare
WO2006027230A1 (fr) * 2004-09-09 2006-03-16 Oec Ag Systeme optique pour un phare de vehicule automobile, unite d'eclairage pour un phare de vehicule automobile et phare de vehicule automobile
EP1686313A3 (fr) * 2005-01-31 2007-04-25 Ichikoh Industries, Ltd. Dispositif d'éclairage pour véhicule et unite de phare pour véhicule comprenant le dispositif d'éclairage
DE102007018996A1 (de) * 2007-04-21 2008-10-23 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
EP2202453A2 (fr) * 2008-12-25 2010-06-30 Ichikoh Industries, Ltd. Phare de véhicule
FR2975462A1 (fr) * 2011-05-17 2012-11-23 Valeo Vision Unite optique, notamment pour vehicule automobile
FR2994246A1 (fr) * 2012-08-02 2014-02-07 Valeo Vision Lentille optique pour dispositif d'eclairage notamment de vehicule automobile
FR3002304A1 (fr) * 2013-02-21 2014-08-22 Valeo Vision Lentille, notamment pour une unite optique
DE102007012023B4 (de) * 2006-03-28 2015-12-31 Varroc Lighting Systems S.R.O LED-Projektorscheinwerfer mit Mehrfacettenlinsen
EP2280214A4 (fr) * 2008-05-28 2018-04-11 Koito Manufacturing Co., Ltd. Équipement d éclairage pour véhicule

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3602262A1 (de) * 1985-11-07 1987-05-14 Bosch Gmbh Robert Scheinwerfer fuer abblendlicht oder nebellicht von kraftfahrzeugen
EP0225313A2 (fr) * 1985-12-04 1987-06-10 Zizala Lichtsysteme GmbH Feux pour véhicule

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3602262A1 (de) * 1985-11-07 1987-05-14 Bosch Gmbh Robert Scheinwerfer fuer abblendlicht oder nebellicht von kraftfahrzeugen
EP0225313A2 (fr) * 1985-12-04 1987-06-10 Zizala Lichtsysteme GmbH Feux pour véhicule

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4420889B4 (de) * 1993-06-16 2006-05-18 Denso Corp., Kariya Beleuchtungsvorrichtung für Fahrzeuge
US5562335A (en) * 1993-06-16 1996-10-08 Nippondenso Co., Ltd. Lighting device for vehicles
US5574328A (en) * 1993-12-07 1996-11-12 Nippondenso Co., Ltd Light source apparatus
US5575551A (en) * 1994-05-31 1996-11-19 Nippondens Co., Ltd Illuminating device for vehicles
EP0689002A3 (fr) * 1994-05-31 1997-03-05 Nippon Denso Co Dispositif d'éclairage pour véhicules
US5697690A (en) * 1994-07-21 1997-12-16 Nippondenso, Ltd. Illuminating device for vehicles
US5730519A (en) * 1994-11-11 1998-03-24 Nippondenso Co., Ltd. Headlight for vehicle
US5676445A (en) * 1994-11-15 1997-10-14 Nippondenso Co., Ltd. Automotive illuminating device
EP0713052A1 (fr) * 1994-11-15 1996-05-22 Nippondenso Co., Ltd. Dispositif d'illumination pour véhicule automobile
US5685627A (en) * 1994-12-12 1997-11-11 Nippondenso Co., Ltd. Headlamp for a vehicle
EP0721085A1 (fr) * 1994-12-12 1996-07-10 Nippondenso Co., Ltd. Projecteur d'un véhicule
US5615090A (en) * 1994-12-21 1997-03-25 Nippondenso Co., Ltd. Headlight for vehicle
US5692823A (en) * 1995-01-31 1997-12-02 Nippondenso Co., Ltd. Illuminating device
EP0762809A2 (fr) * 1995-09-12 1997-03-12 Nippondenso Co., Ltd. Dispositif à lampe à décharge
EP1306607A3 (fr) * 1995-09-12 2003-07-23 Denso Corporation Dispositif pour lampe à décharge
EP0762809A3 (fr) * 1995-09-12 1999-10-13 Denso Corporation Dispositif à lampe à décharge
US6007210A (en) * 1995-09-12 1999-12-28 Denso Corporation Discharge lamp device having a light distribution compound lens
US5921671A (en) * 1995-10-18 1999-07-13 Denso Corporation Light-distributing lens of head lamp for vehicles
DE19811570C2 (de) * 1998-03-17 2001-08-02 Volkswagen Ag Fahrzeugscheinwerfer mit einem Gehäuse und einer Lichtscheibe für eine blendfreie Signalbildfunktion
WO1999047852A1 (fr) 1998-03-17 1999-09-23 Volkswagen Aktiengesellschaft Systeme d'eclairage, notamment pour vehicules automobiles
DE19813597A1 (de) * 1998-03-27 1999-09-30 Volkswagen Ag Beleuchtungseinrichtung. insbesondere Scheinwerfer nach dem Projektionsprinzip für Kraftfahrzeuge
EP1008800A3 (fr) * 1998-12-12 2001-10-17 Hella KG Hueck & Co. Phare
WO2006027230A1 (fr) * 2004-09-09 2006-03-16 Oec Ag Systeme optique pour un phare de vehicule automobile, unite d'eclairage pour un phare de vehicule automobile et phare de vehicule automobile
EP1686313A3 (fr) * 2005-01-31 2007-04-25 Ichikoh Industries, Ltd. Dispositif d'éclairage pour véhicule et unite de phare pour véhicule comprenant le dispositif d'éclairage
DE102007012023B4 (de) * 2006-03-28 2015-12-31 Varroc Lighting Systems S.R.O LED-Projektorscheinwerfer mit Mehrfacettenlinsen
DE102007018996A1 (de) * 2007-04-21 2008-10-23 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
EP2280214A4 (fr) * 2008-05-28 2018-04-11 Koito Manufacturing Co., Ltd. Équipement d éclairage pour véhicule
EP2202453A3 (fr) * 2008-12-25 2011-02-16 Ichikoh Industries, Ltd. Phare de véhicule
JP2010153180A (ja) * 2008-12-25 2010-07-08 Ichikoh Ind Ltd 車両用前照灯
EP2202453A2 (fr) * 2008-12-25 2010-06-30 Ichikoh Industries, Ltd. Phare de véhicule
FR2975462A1 (fr) * 2011-05-17 2012-11-23 Valeo Vision Unite optique, notamment pour vehicule automobile
EP2525142A3 (fr) * 2011-05-17 2017-06-28 Valeo Vision Unité d'optique, notamment pour véhicule automobile
FR2994246A1 (fr) * 2012-08-02 2014-02-07 Valeo Vision Lentille optique pour dispositif d'eclairage notamment de vehicule automobile
EP2693112A3 (fr) * 2012-08-02 2014-03-12 Valeo Vision Lentille optique pour dispositif d'éclairage notamment de véhicule automobile
FR3002304A1 (fr) * 2013-02-21 2014-08-22 Valeo Vision Lentille, notamment pour une unite optique
EP2770248A1 (fr) * 2013-02-21 2014-08-27 Valeo Vision Lentille, notamment pour unité optique

Also Published As

Publication number Publication date
EP0623780A3 (fr) 1995-01-25
AT400887B (de) 1996-04-25
ATA85593A (de) 1995-08-15
EP0623780B1 (fr) 1996-11-06
ES2094038T3 (es) 1997-01-01
DE59400981D1 (de) 1996-12-12

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