EP1160506A2 - Vehicle headlamp of the projection type and lighting device comprising at least one such a headlamp - Google Patents

Vehicle headlamp of the projection type and lighting device comprising at least one such a headlamp Download PDF

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Publication number
EP1160506A2
EP1160506A2 EP01111391A EP01111391A EP1160506A2 EP 1160506 A2 EP1160506 A2 EP 1160506A2 EP 01111391 A EP01111391 A EP 01111391A EP 01111391 A EP01111391 A EP 01111391A EP 1160506 A2 EP1160506 A2 EP 1160506A2
Authority
EP
European Patent Office
Prior art keywords
light
wavelength range
shielding device
headlight
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.)
Granted
Application number
EP01111391A
Other languages
German (de)
French (fr)
Other versions
EP1160506A3 (en
EP1160506B1 (en
Inventor
Johannes Eschler
Reinhold Fiess
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
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Publication of EP1160506A2 publication Critical patent/EP1160506A2/en
Publication of EP1160506A3 publication Critical patent/EP1160506A3/en
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Publication of EP1160506B1 publication Critical patent/EP1160506B1/en
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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/14—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing polarised light
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
    • F21S41/13—Ultraviolet light; Infrared light
    • 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
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24-F21S41/28
    • 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
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
    • F21S41/635—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by moving refractors, filters or transparent cover plates
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/689—Flaps, i.e. screens pivoting around one of their edges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/04—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for filtering out infrared radiation
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/17—Discharge light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes

Definitions

  • the invention is based on a headlight for vehicles according to the projection principle and one Lighting device with at least one Headlights according to the preamble of claim 1.
  • a generic headlight is from DE 196 21 254 A1 known.
  • the headlight has a light source and a reflector through which the light source emitted light is reflected.
  • In the beam path of the Reflector of reflected light beam is one Shielding device arranged in the form of an aperture which is part of the light beam reflected by the reflector is shielded and that for light in the visible Wavelength range is opaque. Through the Shielding device becomes a Corposcuro boundary from which Headlights emerging visible light generated.
  • In Light exit direction after the shielding device is one Lens arranged through which and reflected by the reflector light passing the shielding device passes through.
  • the shielding device for generating the The cut-off line is required to avoid glare Avoid oncoming traffic through visible light, however is the visibility for the driver himself limited so that this is at a greater distance cannot perceive objects located, since they cannot be illuminated.
  • the headlight according to the invention with the features according to Claim 1 has the advantage that in addition to the lighting of the area in front of the vehicle with light in visible wavelength range at a greater distance lying area with light in the infrared Wavelength range is illuminated, which is an improvement of the visual conditions for the vehicle driver without that oncoming traffic is blinded.
  • the lighting device according to Claim 10 has the advantage that by the sensor device that by the light in the infrared wavelength range illuminated area detected and on the display device is shown for the vehicle driver, so that the Vehicle drivers are also at a great distance Can perceive objects.
  • the further training according to claim 3 additionally enables a high beam function with light in the visible wavelength range.
  • the training according to Claim 4 enables the use of the Shielding device shielded light in the visible Wavelength range.
  • the training according to claim 6 enables targeted determination of the area or areas which illuminates with light in the infrared wavelength range become.
  • the training according to claim 8 enables Avoidance of interference from other light sources originating light in the infrared wavelength range.
  • the Training according to claim 9 also enables Avoidance of interference from other light sources originating light in the infrared wavelength range.
  • FIG. 1 shows a vehicle with a Illumination device in a schematic representation a headlight
  • Figure 2 the headlight in an enlarged Representation
  • Figure 3 one in front of the headlight arranged measuring screen.
  • the Lighting device has at least one at the front end the body of the motor vehicle arranged headlights 10, which will be described in more detail below.
  • headlights 10 are provided that are close the side edges of the body of the vehicle are arranged.
  • the headlights both light in visible wavelength range as well as light in the invisible infrared wavelength range.
  • the lighting device has a sensor device 12 through which the one illuminated by the infrared light Area in front of the vehicle is detected.
  • the sensor device 12 can for example be a video camera, a CCD sensor or be a CMOS sensor.
  • the sensor device 12 is equipped with a Connected display device 14, which is in the field of view of Vehicle driver is arranged and on which the with the infrared light illuminated and by the sensor device 12 detected area for the vehicle driver is shown.
  • the display device 14 can, for example, be a screen be or a projection device with which one Image of the area detected by the sensor device 12 is generated on the windshield of the vehicle.
  • the headlight 10 is after Projection principle constructed and has a light source 20 on both light in the visible wavelength range and also light in the invisible wavelength range, emits at least in the infrared wavelength range.
  • the Light source 20 may be an incandescent lamp, or preferably one Be a gas discharge lamp.
  • the light source 20 is in one concave curved reflector 22 used by the of the Light source 20 emitted light as a light beam is reflected.
  • the reflector 22 can be, for example have an ellipsoidal or ellipsoidal shape so that through this a converging light beam is reflected becomes.
  • the luminous element of the light source 20, that is to say its Incandescent filament or arc, is approximately in the range of inner focus of the reflector 22 is arranged.
  • a light beam is a shielding device 24 in the form of a Aperture arranged for light in the visible Wavelength range is opaque.
  • the Shielding device 24 is substantially below the optical axis 23 of the reflector 22 arranged and points an upper edge 26.
  • the shielding device 24 thus part of the visible light from the reflector 22 reflected light beam shielded so that this is not can emerge from the headlight.
  • the wavelength range is given a Patoscuro limit according to the location and shape of the top edge 26 of the Shielding device 24.
  • the shielding device 24 can be approximately in the plane of the one pointing in the light exit direction 28 Front edge of the reflector 22 or to this in Light exit direction 28 may be arranged offset.
  • a lens 30 is arranged through which the reflector 22 reflected and on the shielding device 24 passing light beam passes through.
  • the bundle of light is deflected when passing through the lens 30, so that this to illuminate the area in front of the vehicle predefined illuminance distribution generated.
  • the Lens 30 has an approximately flat side facing the reflector 22 and a convex curved side facing away from it, the preferably has an aspherical curvature. Doing so the top edge 26 of the shield 24 as an upper Light-dark boundary depicted that from which from the Headlight emerging from light beam illuminated area limited. A glare from the Avoiding oncoming traffic.
  • That from the headlight emerging light bundles in the visible wavelength range is a dimmed light beam, preferably a Low beam.
  • the light exit opening of the Headlamp 10 can with a translucent pane 32 can be covered, which can be smooth, so that essentially unaffected by this light passes through, or at least partially optical Can have profiles through which light passes is distracted and / or scattered.
  • FIG 3 is a distance from the headlight arranged measuring screen 80 shown by the from Headlight emitted light is illuminated.
  • the Measuring screen 80 has a horizontal center plane HH and a vertical center plane VV, which is in a point HV to cut.
  • the measuring screen 80 represents the projection a roadway in front of the headlight, the would be illuminated accordingly.
  • the measuring screen 80 is through the light emitted by the headlight in the visible Wavelength range illuminated in an area 82.
  • the Area 82 is up through the Corposcuro boundary limited by the top edge 26 of the shielding device 24 is determined.
  • the light-dark boundary points to the Oncoming traffic side, that is in the version shown the left side of the headlamp for right - hand traffic Measuring screen 80, a horizontal section 83 on the slightly below the horizontal central plane HH des Measuring screen 80 runs.
  • the Patoscuro limit On your own traffic side, that is the right side of the measuring screen 80 in right-hand traffic, the Patoscuro limit has one starting from the horizontal Section 83 to the right ascending section 84. The from the headlight in the visible wavelength range emitted light beam thus points to its own A greater range on the traffic side than on the Oncoming traffic side.
  • the shielding device 24 is at least in some areas for light in the infrared wavelength range at least partially permeable.
  • the Shielding device 24 for light in the near infrared Wavelength range between about 780 nm and about 7 ⁇ m at least partially permeable.
  • the reflector 22 is in an area through which the light source 20 emits Light is reflected that towards the shielding device 24 runs, designed such that light through this is reflected, its share in the infrared Wavelength range after passing through the Shielding device 24 and the lens 30 a larger one Has a range than that on the shielding device 24 passing light in the visible wavelength range.
  • the shielding device 24 Through that which passes through the shielding device 24 Light in the infrared wavelength range thus turns on Area 88 of the measuring screen 80 illuminated, the higher is arranged as that illuminated by visible light Area 82 and on the road accordingly further is arranged as the region 82. Preferably closes the far range 88 is directly above the Patoscuro limit 83.84 to the area 82. Through the sensor device 12 the far range 88 is detected and on the Display device 14 shown for the vehicle driver, so that the vehicle driver is also in the long range 88 can detect objects located. The far range 88 corresponds approximately to a high beam area, for example when the high beam is switched on with visible light would be illuminated.
  • the shielding device 24 can be mounted on the reflector 22 facing side at least partially in the area in which this for the light in the infrared wavelength range is transparent to light in the visible wavelength range be at least partially reflective. This makes visible through the shielding device 24 Light reflected back onto the reflector 22 through which this light is at least partially reflected in this way can that this passes the shielding device 24 and emerges from the headlight.
  • the shielding device 24 can be used at least in some areas as reflective Interference filter be formed.
  • the shielding device 24 can be permeable to light over its entire surface in the infrared wavelength range or only in one or several partial areas, the shielding device 24 in the other sub-areas light in the infrared Wavelength range absorbed or reflected. Hereby can selectively the location and size of the far range 88, the on the measuring screen 80 by the light in the infrared Wavelength range is illuminated, as well as the Illuminance of the far range 88 can be determined.
  • the light source 20 can be operated constantly or pulsed or modulated.
  • the modulation frequency is preferably at least about 100 Hz, so that for human eye the modulation is not noticeable is.
  • the sensor device 12 becomes synchronous with the light source 20, that is operated with the same modulation frequency, so that through this the illumination of the far range 88 only is detected when this is illuminated by the light source 20 becomes.
  • the sensor device 12 can have an aperture 34 have through which the incidence of light in the Sensor device 12 is controlled.
  • Modulated operation of the light source 20 can also be provided be that in the beam path through the shielding device 24 passing light in the infrared Wavelength range a polarizer device 36 is arranged, through which the headlights emerging infrared light is linearly polarized.
  • the Polarizer device 36 can, for example, on the Shielding device 24 or on the cover plate 32 be applied or as a separate component in the Beam path of the through the shielding device 24 passing light may be arranged.
  • a second polarizer device 38 can be arranged which is also referred to as an analyzer, and their Direction of polarization compared to the direction of polarization the polarization device 36 is rotated by 90 °.
  • the polarizers 36, 38 will dazzle the Sensor device 12 by other light sources, for example light sources of the headlights oncoming vehicles, originating and directly in the Sensor device 12 incident light can be avoided because this because of the different polarization directions not or only weakened into the sensor device 12 can occur.
  • the shielding device 24 can be fixed in the headlight 10 to be arranged or movable between one Position in which, as explained above, in Beam path of the light beam reflected by the reflector 22 is arranged and with its upper edge 26 Light-dark boundary 83.84 of the visible light beam generated, and at least one other position in which the Shielding device 24 at least less far into the Beam path of the light beam reflected by the reflector 22 protrudes or is arranged outside the beam path.
  • Adjustment element 40 For Movement of the shielding device 24 engages it Adjustment element 40.
  • the shielding device 24 can for example, be displaceable in approximately the vertical direction or about an axis 42, for example, running horizontally be pivotable.
  • Shielding device 24 in Figure 2 With solid lines that is Shielding device 24 in Figure 2 in its Beam path projecting position shown and with dashed lines in their out of the ray path distant position. If the shield 24 in their position in the beam path, so the light-dark boundary 83.84 of the visible Beam of light generated and by the headlight 10 is a Low beam with visible light covering area 82 illuminated, and a high beam with infrared light, that illuminates the far range 88, in which none Oncoming traffic glare occurs. In this position is the shielding device 24 if that The vehicle's low beam is switched on. If the Shielding device 24 from the beam path of the Reflector 22 reflected light beam is moved out, so the visible from the headlight 10 continues Beam of light illuminating area 82.
  • This Position is the shielding device 24 when that High beam of the vehicle is switched on and none Oncoming traffic is present.

Abstract

The headlamp has a light source (20) with a reflector (22) reflecting light from the source as a beam and a screen (24) opaque to visible light for producing the light/dark boundary of emitted visible light followed by a lens (30) via which reflected light passes. The screen is at least partly transparent to infrared light in at least one area. Infrared light passing through the screen has a greater range than visible light passing round it. Independent claims are also included for the following: an illumination device with at least one headlamp.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Scheinwerfer für Fahrzeuge nach dem Projektionsprinzip und einer Beleuchtungseinrichtung mit wenigstens einem solchen Scheinwerfer nach der Gattung des Anspruchs 1.The invention is based on a headlight for vehicles according to the projection principle and one Lighting device with at least one Headlights according to the preamble of claim 1.

Ein gattungsgemäßer Scheinwerfer ist durch die DE 196 21 254 A1 bekannt. Der Scheinwerfer weist eine Lichtquelle und einen Reflektor auf, durch den von der Lichtquelle ausgesandtes Licht reflektiert wird. Im Strahlengang des vom Reflektor reflektierten Lichtbündels ist eine Abschirmvorrichtung in Form einer Blende angeordnet, durch die ein Teil des vom Reflektor reflektierten Lichtbündels abgeschirmt wird und die für Licht im sichtbaren Wellenlängenbereich undurchlässig ist. Durch die Abschirmvorrichtung wird eine Helldunkelgrenze des aus dem Scheinwerfer austretenden sichtbaren Lichts erzeugt. In Lichtaustrittsrichtung nach der Abschirmvorrichtung ist eine Linse angeordnet, durch die vom Reflektor reflektiertes und an der Abschirmvorrichtung vorbeigelangendes Licht hindurchtritt. Die Abschirmvorrichtung zur Erzeugung der Helldunkelgrenze ist erforderlich, um eine Blendung des Gegenverkehrs durch sichtbares Licht zu vermeiden, jedoch ist dadurch die Sichtweite für den Fahrzeuglenker selbst begrenzt, so daß dieser sich in größerer Entfernung befindende Objekte nicht wahrnehmen kann, da diese nicht beleuchtet werden.A generic headlight is from DE 196 21 254 A1 known. The headlight has a light source and a reflector through which the light source emitted light is reflected. In the beam path of the Reflector of reflected light beam is one Shielding device arranged in the form of an aperture which is part of the light beam reflected by the reflector is shielded and that for light in the visible Wavelength range is opaque. Through the Shielding device becomes a chiaroscuro boundary from which Headlights emerging visible light generated. In Light exit direction after the shielding device is one Lens arranged through which and reflected by the reflector light passing the shielding device passes through. The shielding device for generating the The cut-off line is required to avoid glare Avoid oncoming traffic through visible light, however is the visibility for the driver himself limited so that this is at a greater distance cannot perceive objects located, since they cannot be illuminated.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Scheinwerfer mit den Merkmalen gemäß Anspruch 1 hat demgegenüber den Vorteil, daß zusätzlich zu der Beleuchtung des Bereichs vor dem Fahrzeug mit Licht im sichtbaren Wellenlängenbereich ein in größerer Entfernung liegender Bereich mit Licht im infraroten Wellenlängenbereich beleuchtet wird, der eine Verbesserung der Sichtbedingungen für den Fahrzeuglenker ermöglicht, ohne daß der Gegenverkehr geblendet wird. Beim Scheinwerfer sind dabei keine zusätzlichen Bauteile gegenüber der bekannten Ausführung erforderlich. Die Beleuchtungseinrichtung gemäß Anspruch 10 hat den Vorteil, daß durch die Sensoreinrichtung der durch das Licht im infraroten Wellenlängenbereich beleuchtete Bereich erfaßt und auf der Anzeigevorrichtung für den Fahrzeuglenker dargestellt wird, so daß der Fahrzeuglenker auch in großer Entfernung sich befindende Objekte wahrnehmen kann.The headlight according to the invention with the features according to Claim 1 has the advantage that in addition to the lighting of the area in front of the vehicle with light in visible wavelength range at a greater distance lying area with light in the infrared Wavelength range is illuminated, which is an improvement of the visual conditions for the vehicle driver without that oncoming traffic is blinded. When headlights are no additional components compared to the known one Execution required. The lighting device according to Claim 10 has the advantage that by the sensor device that by the light in the infrared wavelength range illuminated area detected and on the display device is shown for the vehicle driver, so that the Vehicle drivers are also at a great distance Can perceive objects.

In den abhängigen Ansprüchen sind vorteilhafte Ausgestaltungen und Weiterbildungen des erfindungsgemäßen Scheinwerfers angegeben. Die Weiterbildung gemäß Anspruch 3 ermöglicht zusätzlich eine Fernlichtfunktion mit Licht im sichtbaren Wellenlängenbereich. Die Ausbildung gemäß Anspruch 4 ermöglicht die Nutzung des von der Abschirmvorrichtung abgeschirmten Lichts im sichtbaren Wellenlängenbereich. Die Ausbildung gemäß Anspruch 6 ermöglicht eine gezielte Bestimmung des oder der Bereiche, die mit Licht im infraroten Wellenlängenbereich beleuchtet werden. Die Ausbildung gemäß Anspruch 8 ermöglicht die Vermeidung einer Beeinflußung durch von anderen Lichtquellen herrührendem Licht im infraroten Wellenlängenbereich. Die Ausbildung gemäß Anspruch 9 ermöglicht ebenfalls die Vermeidung einer Beeinflußung durch von anderen Lichtquellen herrührendem Licht im infraroten Wellenlängenbereich.In the dependent claims are advantageous Refinements and developments of the invention Headlights specified. The further training according to claim 3 additionally enables a high beam function with light in the visible wavelength range. The training according to Claim 4 enables the use of the Shielding device shielded light in the visible Wavelength range. The training according to claim 6 enables targeted determination of the area or areas which illuminates with light in the infrared wavelength range become. The training according to claim 8 enables Avoidance of interference from other light sources originating light in the infrared wavelength range. The Training according to claim 9 also enables Avoidance of interference from other light sources originating light in the infrared wavelength range.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 ein Fahrzeug mit einer Beleuchtungseinrichtung in schematischer Darstellung mit einem Scheinwerfer, Figur 2 den Scheinwerfer in vergrößerter Darstellung und Figur 3 einen vor dem Scheinwerfer angeordneten Meßschirm.An embodiment of the invention is in the drawing shown and in the following description explained. FIG. 1 shows a vehicle with a Illumination device in a schematic representation a headlight, Figure 2 the headlight in an enlarged Representation and Figure 3 one in front of the headlight arranged measuring screen.

Beschreibung des AusführungsbeispielsDescription of the embodiment

In Figur 1 ist ein Fahrzeug, insbesondere ein Kraftfahrzeug, mit einer Beleuchtungseinrichtung dargestellt. Die Beleuchtungseinrichtung weist wenigstens einen am Frontende der Karosserie des Kraftfahrzeugs angeordneten Scheinwerfer 10 auf, der nachfolgend noch näher beschrieben wird. Üblicherweise sind zwei Scheinwerfer 10 vorgesehen, die nahe den seitlichen Rändern der Karosserie des Fahrzeugs angeordnet sind. Durch den Scheinwerfer wird sowohl Licht im sichtbaren Wellenlängenbereich ausgesandt als auch Licht im nicht sichtbaren infraroten Wellenlängenbereich. Durch das sichtbare Licht wird eine für den Fahrzeuglenker direkt wahrnehmbare Beleuchtung vor dem Fahrzeug bewirkt, während für den Fahrzeuglenker die durch das infrarote Licht bewirkte Beleuchtung nicht direkt wahrnehmbar ist. Hierzu weist die Beleuchtungseinrichtung eine Sensoreinrichtung 12 auf, durch die der durch das infrarote Licht beleuchtete Bereich vor dem Fahrzeug erfaßt wird. Die Sensoreinrichtung 12 kann beispielsweise eine Videokamera, ein CCD-Sensor oder ein CMOS-Sensor sein. Die Sensoreinrichtung 12 ist mit einer Anzeigevorrichtung 14 verbunden, die im Blickfeld des Fahrzeuglenkers angeordnet ist und auf der der mit dem infraroten Licht beleuchtete und von der Sensoreinrichtung 12 erfaßte Bereich für den Fahrzeuglenker dargestellt wird. Die Anzeigevorrichtung 14 kann beispielsweise ein Bildschirm sein oder eine Projektionseinrichtung, mit der eine Abbildung des von der Sensoreinrichtung 12 erfaßten Bereichs auf die Windschutzscheibe des Fahrzeugs erzeugt wird.1 shows a vehicle, in particular a motor vehicle, represented with a lighting device. The Lighting device has at least one at the front end the body of the motor vehicle arranged headlights 10, which will be described in more detail below. Usually, two headlights 10 are provided that are close the side edges of the body of the vehicle are arranged. The headlights both light in visible wavelength range as well as light in the invisible infrared wavelength range. By the visible light becomes a direct one for the vehicle driver perceptible lighting in front of the vehicle while for the vehicle driver by the infrared light caused lighting is not directly perceptible. For this the lighting device has a sensor device 12 through which the one illuminated by the infrared light Area in front of the vehicle is detected. The sensor device 12 can for example be a video camera, a CCD sensor or be a CMOS sensor. The sensor device 12 is equipped with a Connected display device 14, which is in the field of view of Vehicle driver is arranged and on which the with the infrared light illuminated and by the sensor device 12 detected area for the vehicle driver is shown. The display device 14 can, for example, be a screen be or a projection device with which one Image of the area detected by the sensor device 12 is generated on the windshield of the vehicle.

Nachfolgend wird der Aufbau des Scheinwerfers 10 näher erläutert. Der Scheinwerfer 10 ist nach dem Projektionsprnzip aufgebaut und weist eine Lichtquelle 20 auf, die sowohl Licht im sichtbaren Wellenlängenbereich als auch Licht im nicht sichtbaren Wellenlängenbereich, zumindest im infraroten Wellenlängenbereich aussendet. Die Lichtquelle 20 kann eine Glühlampe oder vorzugsweise eine Gasentladungslampe sein. Die Lichtquelle 20 ist in einen konkav gekrümmten Reflektor 22 eingesetzt, durch den von der Lichtquelle 20 ausgesandtes Licht als ein Lichtbündel reflektiert wird. Der Reflektor 22 kann beispielsweise eine ellipsoide oder ellipsoidähnliche Form aufweisen, so daß durch diesen ein konvergierendes Lichtbündel reflektiert wird. Der Leuchtkörper der Lichtquelle 20, das heißt deren Glühwendel oder Lichtbogen, ist dabei etwa im Bereich des inneren Brennpunkts des Reflektors 22 angeordnet.The structure of the headlamp 10 is described in more detail below explained. The headlight 10 is after Projection principle constructed and has a light source 20 on both light in the visible wavelength range and also light in the invisible wavelength range, emits at least in the infrared wavelength range. The Light source 20 may be an incandescent lamp, or preferably one Be a gas discharge lamp. The light source 20 is in one concave curved reflector 22 used by the of the Light source 20 emitted light as a light beam is reflected. The reflector 22 can be, for example have an ellipsoidal or ellipsoidal shape so that through this a converging light beam is reflected becomes. The luminous element of the light source 20, that is to say its Incandescent filament or arc, is approximately in the range of inner focus of the reflector 22 is arranged.

Im Strahlengang des vom Reflektor 22 reflektierten Lichtbündels ist eine Abschirmvorrichtung 24 in Form einer Blende angeordnet, die für Licht im sichtbaren Wellenlängenbereich undurchlässig ist. Die Abschirmvorrichtung 24 ist im wesentlichen unterhalb der optischen Achse 23 des Reflektors 22 angeordnet und weist eine Oberkante 26 auf. Durch die Abschirmvorrichtung 24 wird somit ein Teil des sichtbaren Lichts des vom Reflektor 22 reflektierten Lichtbündels abgeschirmt, so daß dieses nicht aus dem Scheinwerfer austreten kann. An der Abschirmvorrichtung 24 vorbeigelangendes Licht im sichtbaren Wellenlängenbereich erhält eine Helldunkelgrenze entsprechend der Lage und Form der Oberkante 26 der Abschirmvorrichtung 24. Die Abschirmvorrichtung 24 kann etwa in der Ebene des in Lichtaustrittsrichtung 28 weisenden Vorderrands des Reflektors 22 oder zu dieser in Lichtaustrittsrichtung 28 versetzt angeordnet sein.In the beam path of the reflected by the reflector 22 A light beam is a shielding device 24 in the form of a Aperture arranged for light in the visible Wavelength range is opaque. The Shielding device 24 is substantially below the optical axis 23 of the reflector 22 arranged and points an upper edge 26. The shielding device 24 thus part of the visible light from the reflector 22 reflected light beam shielded so that this is not can emerge from the headlight. At the Shielding device 24 passing light in the visible The wavelength range is given a chiaroscuro limit according to the location and shape of the top edge 26 of the Shielding device 24. The shielding device 24 can be approximately in the plane of the one pointing in the light exit direction 28 Front edge of the reflector 22 or to this in Light exit direction 28 may be arranged offset.

In Lichtaustrittsrichtung 28 nach der Abschirmvorrichtung 24 ist eine Linse 30 angeordnet, durch die das Reflektor 22 reflektierte und an der Abschirmvorrichtung 24 vorbeigelangende Lichtbündel hindurchtritt. Das Lichtbündel wird beim Durchtritt durch die Linse 30 abgelenkt, so daß dieses zur Beleuchtung des Bereichs vor dem Fahrzeug eine vorgegebene Beleuchtungsstärkeverteilung erzeugt. Die Linse 30 weist eine dem Reflektor 22 zugewandte etwa ebene Seite und eine diesem abgewandte konvex gekrümmte Seite auf, die vorzugsweise eine asphärische Krümmung besitzt. Dabei wird die Oberkante 26 der Abschirmvorrichtung 24 als eine obere Helldunkelgrenze abgebildet, die den von dem aus dem Scheinwerfer austretenden Lichtbündel beleuchteten Bereich begrenzt. Durch die Helldunkelgrenze wird eine Blendung des Gegenverkehrs vermieden. Das aus dem Scheinwerfer austretende Lichtbündel im sichtbaren Wellenlängenbereich ist ein abgeblendetes Lichtbündel, vorzugsweise ein Abblendlichtbündel. Die Lichtaustrittsöffnung des Scheinwerfers 10 kann mit einer lichtdurchlässigen Scheibe 32 abgedeckt sein, die glatt ausgebildet sein kann, so daß durch diese Licht im wesentlichen unbeeinflußt hindurchtritt, oder die zumindest bereichsweise optische Profile aufweisen kann, durch die hindurchtretendes Licht abgelenkt und/oder gestreut wird. In the light exit direction 28 after the shielding device 24 a lens 30 is arranged through which the reflector 22 reflected and on the shielding device 24 passing light beam passes through. The bundle of light is deflected when passing through the lens 30, so that this to illuminate the area in front of the vehicle predefined illuminance distribution generated. The Lens 30 has an approximately flat side facing the reflector 22 and a convex curved side facing away from it, the preferably has an aspherical curvature. Doing so the top edge 26 of the shield 24 as an upper Light-dark boundary depicted that from which from the Headlight emerging from light beam illuminated area limited. A glare from the Avoiding oncoming traffic. That from the headlight emerging light bundles in the visible wavelength range is a dimmed light beam, preferably a Low beam. The light exit opening of the Headlamp 10 can with a translucent pane 32 can be covered, which can be smooth, so that essentially unaffected by this light passes through, or at least partially optical Can have profiles through which light passes is distracted and / or scattered.

In Figur 3 ist ein mit Abstand vor dem Scheinwerfer angeordneter Meßschirm 80 dargestellt, der durch das vom Scheinwerfer ausgesandte Licht beleuchtet wird. Der Meßschirm 80 weist eine horizontale Mittelebene HH und eine vertikale Mittelebene VV auf, die sich in einem Punkt HV schneiden. Der Meßschirm 80 repräsentiert die Projektion einer vor dem Scheinwerfer liegenden Fahrbahn, die entsprechend beleuchtet würde. Der Meßschirm 80 wird durch das vom Scheinwerfer ausgesandte Licht im sichtbaren Wellenlängenbereich in einem Bereich 82 beleuchtet. Der Bereich 82 ist nach oben durch die Helldunkelgrenze begrenzt, die durch die Oberkante 26 der Abschirmvorrichtung 24 bestimmt ist. Die Helldunkelgrenze weist auf der Gegenverkehrsseite, das ist bei der dargestellten Ausführung des Scheinwerfers für Rechtsverkehr die linke Seite des Meßschirms 80, einen horizontalen Abschnitt 83 auf, der etwas unterhalb der horizontalen Mittelebene HH des Meßschirms 80 verläuft. Auf der eigenen Verkehrsseite, das ist bei Rechtsverkehr die rechte Seite des Meßschirms 80, weist die Helldunkelgrenze einen ausgehend vom horizontalen Abschnitt 83 nach rechts ansteigenden Abschnitt 84 auf. Das vom Scheinwerfer im sichtbaren Wellenlängenbereich ausgesandte Lichtbündel weist somit auf der eigenen Verkehrsseite eine größere Reichweite auf als auf der Gegenverkehrsseite.In Figure 3 is a distance from the headlight arranged measuring screen 80 shown by the from Headlight emitted light is illuminated. The Measuring screen 80 has a horizontal center plane HH and a vertical center plane VV, which is in a point HV to cut. The measuring screen 80 represents the projection a roadway in front of the headlight, the would be illuminated accordingly. The measuring screen 80 is through the light emitted by the headlight in the visible Wavelength range illuminated in an area 82. The Area 82 is up through the chiaroscuro boundary limited by the top edge 26 of the shielding device 24 is determined. The light-dark boundary points to the Oncoming traffic side, that is in the version shown the left side of the headlamp for right - hand traffic Measuring screen 80, a horizontal section 83 on the slightly below the horizontal central plane HH des Measuring screen 80 runs. On your own traffic side, that is the right side of the measuring screen 80 in right-hand traffic, the chiaroscuro limit has one starting from the horizontal Section 83 to the right ascending section 84. The from the headlight in the visible wavelength range emitted light beam thus points to its own A greater range on the traffic side than on the Oncoming traffic side.

Erfindungsgemäß ist die Abschirmvorrichtung 24 wenigstens bereichsweise für Licht im infraroten Wellenlängenbereich zumindest teilweise durchlässig. Vorzugsweise ist die Abschirmvorrichtung 24 für Licht im nahen infraroten Wellenlängenbereich zwischen etwa 780 nm und etwa 7 µm zumindest teilweise durchlässig. Der Reflektor 22 ist in einem Bereich, durch den von der Lichtquelle 20 ausgesandtes Licht reflektiert wird, das zur Abschirmvorrichtung 24 hin verläuft, derart ausgebildet, daß durch diesen Licht reflektiert wird, dessen Anteil im infraroten Wellenlängenbereich nach Durchtritt durch die Abschirmvorrichtung 24 und die Linse 30 eine größere Reichweite aufweist als das an der Abschirmvorrichtung 24 vorbeigelangende Licht im sichtbaren Wellenlängenbereich. Durch das durch die Abschirmvorrichtung 24 hindurchtretende Licht im infraroten Wellenlängenbereich wird somit ein Bereich 88 des Meßschirms 80 beleuchtet, der höher angeordnet ist als der durch das sichtbare Licht beleuchtete Bereich 82 und auf der Fahrbahn entsprechend ferner angeordnet ist als der Bereich 82. Vorzugsweise schließt sich der Fernbereich 88 direkt oberhalb der Helldunkelgrenze 83,84 an den Bereich 82 an. Durch die Sensoreinrichtung 12 wird der Fernbereich 88 erfaßt und auf der Anzeigevorrichtung 14 für den Fahrzeuglenker dargestellt, so daß der Fahrzeuglenker auch sich im Fernbereich 88 befindende Objekte erkennen kann. Der Fernbereich 88 entspricht beispielsweise etwa einem Fernlichtbereich, der bei eingeschaltetem Fernlicht mit sichtbarem Licht beleuchtet würde.According to the invention, the shielding device 24 is at least in some areas for light in the infrared wavelength range at least partially permeable. Preferably, the Shielding device 24 for light in the near infrared Wavelength range between about 780 nm and about 7 µm at least partially permeable. The reflector 22 is in an area through which the light source 20 emits Light is reflected that towards the shielding device 24 runs, designed such that light through this is reflected, its share in the infrared Wavelength range after passing through the Shielding device 24 and the lens 30 a larger one Has a range than that on the shielding device 24 passing light in the visible wavelength range. Through that which passes through the shielding device 24 Light in the infrared wavelength range thus turns on Area 88 of the measuring screen 80 illuminated, the higher is arranged as that illuminated by visible light Area 82 and on the road accordingly further is arranged as the region 82. Preferably closes the far range 88 is directly above the chiaroscuro limit 83.84 to the area 82. Through the sensor device 12 the far range 88 is detected and on the Display device 14 shown for the vehicle driver, so that the vehicle driver is also in the long range 88 can detect objects located. The far range 88 corresponds approximately to a high beam area, for example when the high beam is switched on with visible light would be illuminated.

Die Abschirmvorrichtung 24 kann auf ihrer dem Reflektor 22 zugewandten Seite wenigstens teilweise in dem Bereich, in dem diese für das Licht im infraroten Wellenlängenbereich durchlässig ist, für Licht im sichtbaren Wellenlängenbereich zumindest teilweise reflektierend ausgebildet sein. Hierdurch wird durch die Abschirmvorrichtung 24 sichtbares Licht auf den Reflektor 22 zurückreflektiert, durch den dieses Licht zumindest teilweise derart reflektiert werden kann, daß dieses an der Abschirmvorrichtung 24 vorbeigelangt und aus dem Scheinwerfer austritt. Die Abschirmvorrichtung 24 kann zumindest bereichsweise als reflektierendes Interferenzfilter ausgebildet sein. Die Abschirmvorrichtung 24 kann über ihre gesamte Fläche durchlässig sein für Licht im infraroten Wellenlängenbereich oder nur in einem oder mehreren Teilbereichen, wobei die Abschirmvorrichtung 24 in den übrigen Teilbereichen Licht im infraroten Wellenlängenbereich absorbiert oder reflektiert. Hierdurch können gezielt die Lage und Größe des Fernbereichs 88, der auf dem Meßschirm 80 durch das Licht im infraroten Wellenlängenbereich beleuchtet wird, sowie die Beleuchtungsstärke des Fernbereichs 88 bestimmt werden.The shielding device 24 can be mounted on the reflector 22 facing side at least partially in the area in which this for the light in the infrared wavelength range is transparent to light in the visible wavelength range be at least partially reflective. This makes visible through the shielding device 24 Light reflected back onto the reflector 22 through which this light is at least partially reflected in this way can that this passes the shielding device 24 and emerges from the headlight. The shielding device 24 can be used at least in some areas as reflective Interference filter be formed. The shielding device 24 can be permeable to light over its entire surface in the infrared wavelength range or only in one or several partial areas, the shielding device 24 in the other sub-areas light in the infrared Wavelength range absorbed or reflected. Hereby can selectively the location and size of the far range 88, the on the measuring screen 80 by the light in the infrared Wavelength range is illuminated, as well as the Illuminance of the far range 88 can be determined.

Die Lichtquelle 20 kann konstant betrieben werden oder gepulst bzw. moduliert. Die Modulationsfrequenz beträgt dabei vorzugsweise wenigstens etwa 100 Hz, so daß für das menschliche Auge die Modulation nicht störend wahrnehmbar ist. Die Sensoreinrichtung 12 wird synchron zur Lichtquelle 20, das heißt mit derselben Modulationsfrequenz, betrieben, so daß durch diese die Beleuchtung des Fernbereichs 88 nur erfaßt wird, wenn dieser durch die Lichtquelle 20 beleuchtet wird. Die Sensoreinrichtung 12 kann hierbei eine Blende 34 aufweisen, durch die der Lichteinfall in die Sensoreinrichtung 12 gesteuert wird. Durch einen modulierten Betrieb der Lichtquelle 20 und der Sensoreinrichtung 12 kann eine Blendung der Sensoreinrichtung 12 durch von anderen Lichtquellen, beispielsweise Lichtquellen der Scheinwerfer entgegenkommender Fahrzeuge, herrührendes und direkt in die Sensoreinrichtung 12 einfallendes Licht vermieden oder zumindest verringert werden.The light source 20 can be operated constantly or pulsed or modulated. The modulation frequency is preferably at least about 100 Hz, so that for human eye the modulation is not noticeable is. The sensor device 12 becomes synchronous with the light source 20, that is operated with the same modulation frequency, so that through this the illumination of the far range 88 only is detected when this is illuminated by the light source 20 becomes. The sensor device 12 can have an aperture 34 have through which the incidence of light in the Sensor device 12 is controlled. By a modulated Operation of the light source 20 and the sensor device 12 can glare of the sensor device 12 by others Light sources, for example light sources of the headlights oncoming vehicles, originating and directly in the Sensor device 12 or avoided incident light at least be reduced.

Alternativ oder zusätzlich zu dem vorstehend erläuterten modulierten Betrieb der Lichtquelle 20 kann auch vorgesehen sein, daß im Strahlengang des durch die Abschirmvorrichtung 24 hindurchtretenden Lichts im infraroten Wellenlängenbereich eine Polarisatoreinrichtung 36 angeordnet ist, durch die das aus dem Scheinwerfer austretende infrarote Licht linear polarisiert wird. Die Polarisatoreinrichtung 36 kann beispielsweise auf die Abschirmvorrichtung 24 oder auf die Abdeckscheibe 32 aufgebracht sein oder als separates Bauelement im Strahlengang des durch die Abschirmvorrichtung 24 hindurchtretenden Lichts angeordnet sein. Im Strahlengang des in die Sensoreinrichtung 12 einfallenden Lichts kann eine zweite Polarisatoreinrichtung 38 angeordnet sein, die auch als Analysator bezeichnet wird, und deren Polarisationsrichtung gegenüber der Polarisationsrichtung der Polarisationseinrichtung 36 um 90° gedreht ist. Durch die Polarisationseinrichtungen 36,38 wird eine Blendung der Sensoreinrichtung 12 durch von anderen Lichtquellen, beispielsweise Lichtquellen der Scheinwerfer entgegenkommender Fahrzeuge, herrührendes und direkt in die Sensoreinrichtung 12 einfallendes Licht vermieden werden, da dieses wegen der unterschiedlichen Polarisationsrichtungen nicht oder nur abgeschwächt in die Sensoreinrichtung 12 eintreten kann.Alternatively or in addition to that explained above Modulated operation of the light source 20 can also be provided be that in the beam path through the shielding device 24 passing light in the infrared Wavelength range a polarizer device 36 is arranged, through which the headlights emerging infrared light is linearly polarized. The Polarizer device 36 can, for example, on the Shielding device 24 or on the cover plate 32 be applied or as a separate component in the Beam path of the through the shielding device 24 passing light may be arranged. In the beam path of the light incident in the sensor device 12 a second polarizer device 38 can be arranged which is also referred to as an analyzer, and their Direction of polarization compared to the direction of polarization the polarization device 36 is rotated by 90 °. By the polarizers 36, 38 will dazzle the Sensor device 12 by other light sources, for example light sources of the headlights oncoming vehicles, originating and directly in the Sensor device 12 incident light can be avoided because this because of the different polarization directions not or only weakened into the sensor device 12 can occur.

Die Abschirmvorrichtung 24 kann feststehend im Scheinwerfer 10 angeordnet sein oder beweglich sein, zwischen einer Stellung, in der diese wie vorstehend erläutert im Strahlengang des vom Reflektor 22 reflektierten Lichtbündels angeordnet ist und mit ihrer Oberkante 26 die Helldunkelgrenze 83,84 des sichtbaren Lichtbündels erzeugt, und wenigstens einer weiteren Stellung, in der die Abschirmvorrichtung 24 zumindest weniger weit in den Strahlengang des vom Reflektor 22 reflektierten Lichtbündels ragt oder außerhalb des Strahlengangs angeordnet ist. Zur Bewegung der Abschirmvorrichtung 24 greift an dieser ein Verstellelement 40 an. Die Abschirmvorrichtung 24 kann beispielsweise in etwa vertikaler Richtung verschiebbar sein oder um eine beispielsweise horizontal verlaufende Achse 42 verschwenkbar sein. Mit durchgezogenen Linien ist die Abschirmvorrichtung 24 in Figur 2 in ihrer in den Strahlengang ragenden Stellung dargestellt und mit gestrichelten Linien in ihrer aus dem Strahlengang entfernten Stellung. Wenn sich die Abschirmvorrichtung 24 in ihrer in den Strahlengang ragenden Stellung befindet, so wird durch diese die Helldunkelgrenze 83,84 des sichtbaren Lichtbündels erzeugt und durch den Scheinwerfer 10 wird ein Abblendlichtbündel mit sichtbarem Licht, das den Bereich 82 beleuchtet, und ein Fernlichtbündel mit infrarotem Licht, das den Fernbereich 88 beleuchtet, ausgesandt, bei dem keine Blendung des Gegenverkehrs auftritt. In dieser Stellung befindet sich die Abschirmvorrichtung 24, wenn das Abblendlicht des Fahrzeugs eingeschaltet ist. Wenn die Abschirmvorrichtung 24 aus dem Strahlengang des vom Reflektor 22 reflektierten Lichtbündels herausbewegt ist, so tritt aus dem Scheinwerfer 10 weiterhin das sichtbare Lichtbündel aus, das den Bereich 82 beleuchtet. In dieser Stellung befindet sich die Abschirmvorrichtung 24, wenn das Fernlicht des Fahrzeugs eingeschaltet ist und kein Gegenverkehr vorhanden ist. Zusätzlich tritt auch sichtbares Licht aus, das sonst von der Abschirmvorrichtung 24 abgeschirmt würde, so daß auch der Fernbereich 88 mit sichtbarem Licht beleuchtet wird und somit ein herkömmliches Fernlicht im sichtbaren Wellenlängenbereich realisiert ist.The shielding device 24 can be fixed in the headlight 10 to be arranged or movable between one Position in which, as explained above, in Beam path of the light beam reflected by the reflector 22 is arranged and with its upper edge 26 Light-dark boundary 83.84 of the visible light beam generated, and at least one other position in which the Shielding device 24 at least less far into the Beam path of the light beam reflected by the reflector 22 protrudes or is arranged outside the beam path. For Movement of the shielding device 24 engages it Adjustment element 40. The shielding device 24 can for example, be displaceable in approximately the vertical direction or about an axis 42, for example, running horizontally be pivotable. With solid lines that is Shielding device 24 in Figure 2 in its Beam path projecting position shown and with dashed lines in their out of the ray path distant position. If the shield 24 in their position in the beam path, so the light-dark boundary 83.84 of the visible Beam of light generated and by the headlight 10 is a Low beam with visible light covering area 82 illuminated, and a high beam with infrared light, that illuminates the far range 88, in which none Oncoming traffic glare occurs. In this position is the shielding device 24 if that The vehicle's low beam is switched on. If the Shielding device 24 from the beam path of the Reflector 22 reflected light beam is moved out, so the visible from the headlight 10 continues Beam of light illuminating area 82. In this Position is the shielding device 24 when that High beam of the vehicle is switched on and none Oncoming traffic is present. In addition, there is also visible Lights out that otherwise from the shielding device 24 would be shielded so that the long range 88 with visible light is illuminated and thus a conventional one High beam in the visible wavelength range is realized.

Für die Beleuchtung des Fernbereichs 88 ist kein zusätzlicher Scheinwerfer und keine zusätzliche Lichtquelle erforderlich, und beim Scheinwerfer 10 sind keine zusätzlichen Bauteile erforderlich, wobei lediglich die Abschirmvorrichtung 24 gegenüber bekannten vollständig lichtundurchlässigen Ausführungen derart modifiziert zu werden braucht, daß diese zumindest teilweise durchlässig ist für Licht im infraroten Wellenlängenbereich.For the illumination of the far range 88 there is none additional headlights and no additional light source required, and the headlights 10 are none additional components required, only the Shielding device 24 completely against known opaque versions modified in this way need to be at least partially permeable is for light in the infrared wavelength range.

Claims (12)

Scheinwerfer für Fahrzeuge nach dem Projektionsprinzip, mit einer Lichtquelle (20), mit einem Reflektor (22), durch den von der Lichtquelle (20) ausgesandtes Licht als ein Lichtbündel reflektiert wird, mit einer im Strahlengang des vom Reflektor (22) reflektierten Lichtbündels angeordneten Abschirmvorrichtung (24), die für Licht im sichtbaren Wellenlängenbereich undurchlässig ist und durch die eine Helldunkelgrenze (83,84) des aus dem Scheinwerfer (10) austretenden Lichts im sichtbaren Wellenlängenbereich erzeugt wird, und mit einer in Lichtaustrittsrichtung (28) nach der Abschirmvorrichtung (24) angeordneten Linse (30), durch die vom Reflektor (22) reflektiertes Licht hindurchtritt, dadurch gekennzeichnet, daß die Abschirmvorrichtung (24) wenigstens bereichsweise für Licht in infrarotem Wellenlängenbereich zumindest teilweise durchlässig ist und daß durch die Abschirmvorrichtung (24) hindurchtretendes Licht in infrarotem Wellenlängenbereich eine größere Reichweite besitzt als das an der Abschirmvorrichtung (24) vorbeigelangende Licht im sichtbaren Wellenlängenbereich.Headlights for vehicles according to the projection principle, with a light source (20), with a reflector (22), through which light emitted by the light source (20) is reflected as a light beam, with one arranged in the beam path of the light beam reflected by the reflector (22) Shielding device (24), which is opaque to light in the visible wavelength range and through which a light-dark boundary (83, 84) of the light emerging from the headlight (10) is generated in the visible wavelength range, and with a light exit direction (28) after the shielding device ( 24) arranged lens (30) through which light reflected by the reflector (22) passes, characterized in that the shielding device (24) is at least partially transparent to light in the infrared wavelength range at least in some areas and that light passing through the shielding device (24) in Infrared wavelength range has a greater range sometimes as the light passing the shielding device (24) in the visible wavelength range. Scheinwerfer nach Anspruch 1, dadurch gekennzeichnet, daß die Abschirmvorrichtung (24) für Licht im nahen infraroten Wellenlängenbereich zumindest teilweise durchlässig ist.Headlamp according to claim 1, characterized in that the shielding device (24) is at least partially transparent to light in the near infrared wavelength range. Scheinwerfer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Abschirmvorrichtung (24) zwischen einer Stellung, in der diese in den Strahlengang des vom Reflektor (22) reflektierten Lichtbündels ragt, und wenigstens einer weiteren Stellung, in der diese zumindest weniger weit in den Strahlengang ragt, bewegbar ist.Headlamp according to claim 1 or 2, characterized in that the shielding device (24) between a position in which it projects into the beam path of the light beam reflected by the reflector (22) and at least one further position in which it at least less far into the Beam path protrudes, is movable. Scheinwerfer nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Abschirmvorrichtung (24) auf ihrer dem Reflektor (22) zugewandten Seite wenigstens bereichsweise für Licht im sichtbaren Wellenlängenbereich zumindest teilweise reflektierend ausgebildet ist.Headlight according to one of claims 1 to 3, characterized in that the shielding device (24) on its side facing the reflector (22) is at least partially reflective at least in regions for light in the visible wavelength region. Scheinwerfer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Abschirmvorrichtung (24) wenigstens bereichsweise als reflektierendes Interferenzfilter ausgebildet ist.Headlight according to one of the preceding claims, characterized in that the shielding device (24) is designed at least in regions as a reflective interference filter. Scheinwerfer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Abschirmvorrichtung (24) bereichsweise für Licht in infrarotem Wellenlängenbereich wenigstens teilweise durchlässig ist und bereichsweise für Licht in infrarotem Wellenlängenbereich undurchlässig ist.Headlight according to one of the preceding claims, characterized in that the shielding device (24) is at least partially transparent to light in the infrared wavelength range and is partially transparent to light in the infrared wavelength range. Scheinwerfer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Lichtquelle (20) eine Gasentladungslampe ist.Headlight according to one of the preceding claims, characterized in that the light source (20) is a gas discharge lamp. Scheinwerfer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Lichtquelle (20) moduliert betrieben wird, wobei die Modulationsfrequenz vorzugsweise wenigstens etwa 100 Hz beträgt.Headlight according to one of the preceding claims, characterized in that the light source (20) is operated in a modulated manner, the modulation frequency preferably being at least about 100 Hz. Scheinwerfer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß im Strahlengang des durch die Abschirmvorrichtung (24) hindurchtretenden Lichts in infrarotem Wellenlängenbereich eine Polarisationseinrichtung (36) angeordnet ist, durch die hindurchtretendes Licht linear polarisiert wird.Headlight according to one of the preceding claims, characterized in that a polarization device (36) is arranged in the beam path of the light passing through the shielding device (24) in the infrared wavelength range, by means of which light passing through is linearly polarized. Beleuchtungseinrichtung mit wenigstens einem Scheinwerfer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß diese eine Sensoreinrichtung (12) aufweist, die für das durch die Abschirmvorrichtung (24) hindurchtretende Licht in infrarotem Wellenlängenbereich empfindlich ist und die einen durch dieses Licht beleuchteten Bereich (88) erfaßt, und daß im Sichtbereich des Fahrzeuglenkers eine Anzeigevorrichtung (14) angeordnet ist, auf der der von der Sensoreinrichtung (12) erfaßte Bereich (88) dargestellt wird.Lighting device with at least one headlight according to one of the preceding claims, characterized in that it has a sensor device (12) which is sensitive to the light in the infrared wavelength range passing through the shielding device (24) and which has a region (88) illuminated by this light and that in the field of vision of the vehicle driver a display device (14) is arranged on which the area (88) detected by the sensor device (12) is displayed. Beleuchtungseinrichtung nach Anspruch 10 und Anspruch 8, dadurch gekennzeichnet, daß die Sensoreinrichtung (12) eine Blende (34) zur Steuerung des Lichteinfalls in die Sensoreinrichtung (12) aufweist und daß die Blende (34) synchron zur Modulationsfrequenz der Lichtquelle (20) geöffnet und geschlossen wird.Lighting device according to claim 10 and claim 8, characterized in that the sensor device (12) has a diaphragm (34) for controlling the incidence of light into the sensor device (12) and that the diaphragm (34) is opened and synchronous with the modulation frequency of the light source (20) is closed. Beleuchtungseinrichtung nach Anspruch 10 und Anspruch 9, dadurch gekennzeichnet, daß im Strahlengang des in die Sensoreinrichtung (12) einfallenden Lichts eine weitere Polarisationseinrichtung (38) angeordnet ist, durch die hindurchtretendes Licht linear polarisiert wird, und daß die Polarisationsrichtung der Polarisationseinrichtung (36) des Scheinwerfers (10) zumindest annähernd senkrecht zur Polarisationsrichtung der weiteren Polarisationseinrichtung (38) ist.Illumination device according to Claim 10 and Claim 9, characterized in that a further polarization device (38) is arranged in the beam path of the light incident in the sensor device (12), through which light passing through is linearly polarized, and in that the polarization direction of the polarization device (36) of the Headlight (10) is at least approximately perpendicular to the direction of polarization of the further polarization device (38).
EP01111391A 2000-05-31 2001-05-10 Vehicle headlamp of the projection type and lighting device comprising at least one such a headlamp Expired - Lifetime EP1160506B1 (en)

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DE10027018A DE10027018B4 (en) 2000-05-31 2000-05-31 Vehicle headlight according to the projection principle and lighting device of a vehicle with at least one such headlight
DE10027018 2000-05-31

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Publication number Publication date
DE10027018A1 (en) 2001-12-06
US6467940B2 (en) 2002-10-22
DE10027018B4 (en) 2010-09-09
EP1160506A3 (en) 2004-03-24
US20020001198A1 (en) 2002-01-03
DE50110661D1 (en) 2006-09-21
JP4838444B2 (en) 2011-12-14
EP1160506B1 (en) 2006-08-09
JP2002008415A (en) 2002-01-11

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