EP1298386A1 - Optisches System zur Lichtbündel-Erzeugung unter Verwendung einer Serie von optischen Fasern - Google Patents

Optisches System zur Lichtbündel-Erzeugung unter Verwendung einer Serie von optischen Fasern Download PDF

Info

Publication number
EP1298386A1
EP1298386A1 EP02292396A EP02292396A EP1298386A1 EP 1298386 A1 EP1298386 A1 EP 1298386A1 EP 02292396 A EP02292396 A EP 02292396A EP 02292396 A EP02292396 A EP 02292396A EP 1298386 A1 EP1298386 A1 EP 1298386A1
Authority
EP
European Patent Office
Prior art keywords
light
optical system
elementary
reflector
reflection surface
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.)
Withdrawn
Application number
EP02292396A
Other languages
English (en)
French (fr)
Inventor
Antoine c/o Valeo Vision de Lamberterie
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.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
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 Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP1298386A1 publication Critical patent/EP1298386A1/de
Withdrawn legal-status Critical Current

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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/247—Light guides with a single light source being coupled into the light guide
    • 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
    • F21S41/24—Light guides
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/243—Light guides characterised by the emission area emitting light from one or more of its extremities

Definitions

  • the present invention provides an optical system for formation of a light beam using a series of fibers optics to guide a luminous flux from a source of light towards a reflecting surface composed of a series of elementary reflectors associated with optical fibers.
  • the invention relates in particular to such a system used for the design of a headlight or a motor vehicle light.
  • optical fibers to guide light from a source of light to various locations without having to suffer from significant transmission losses.
  • the luminous flux guided by the fibers is condensed in relatively small dimensions fibers to be distributed, for example, to locations different in a motor vehicle lighting system.
  • An optical system of this type is known from the document FR-A-2684432. It includes a light source and a series of optical fibers which receives the light flux from the source of light and guide it to an optical means consisting of a arrangement of lenses, and of which each optical fiber transmits part of the light flux towards a lens associated therewith.
  • optical means consisting of a arrangement of lenses, and of which each optical fiber transmits part of the light flux towards a lens associated therewith.
  • the optical system 10 is composed of a light source 12, a series of fibers optics 14 and a series of elementary reflectors 18, and of which each optical fiber 14 is associated with an elementary reflector 18.
  • the outlet end section 22 of each optical fiber 14 is stripped over part of its length so as to emit light in all directions, this bare part 24 directly constitutes a light source secondary cylindrical, like for example a lamp with filament filament.
  • Each elementary reflector 18 has an orifice 30 through which the stripped part passes 24 of the optical fiber 14 associated with it, and it is placed at the level of the focus of the elementary reflector 18.
  • the disadvantage of this type of optical system 10 is that to have the least divergent light beam possible, the set of elementary reflectors 18 must reflect a maximum of the rays which are emitted in directions other than that desired. This implies that the surface of reflection of each elementary reflector 18 must extend beyond from his home. This implies a significant depth of each elementary reflector 18, and therefore a space requirement important of the optical system 10, as well as an aspect degraded by the fact that from the outside you can see reflective surfaces juxtaposed each having a significant depth and at the bottom of these we can also see the sections 22 of the ends of fiber optic outlet.
  • the present invention relates to an optical system in which the reflectors have a reduced depth, and the particular style offers an aspect without light source related.
  • the optical system comprises a source of light that emits a luminous flux, a series of optical fibers which guides the light flow from the light source to a reflective surface composed of a series of reflectors elementary and of which each optical fiber comprises a input end which receives part of the luminous flux and a outlet end section which emits this same part of the flow luminous towards an elementary reflector which is associated therewith and is characterized in that the outlet end section comprises a transverse outlet face located at the longitudinal end free from the outlet end section through which part of the flow light guided by the fiber is emitted in the form of a brush globally conical light whose main axis is directed directly or indirectly to the elementary reflector associated with optical fiber.
  • FIG. 1 shows an optical system 10 known from the document of the prior art FR-A-2,782,778.
  • This system optic 10 includes a light source 12 which emits a flux luminous, a series of optical fibers 14 which guide the flow light from light source 12 to a surface reflective 16 composed of a series of reflectors elementary 18.
  • Each fiber 14 has an inlet end 20 which receives part of the luminous flux and an end section of outlet 22.
  • the outlet end section 22 is stripped on a part of its length, i.e. on an end segment 24 free for which the core 26 of the optical fiber 14 is no longer covered by the sheath 28 of the fiber 14.
  • This segment 24 is treated optically so as to produce light leaks approximately constant over its entire surface. So the segment 24 constitutes a secondary light source globally cylindrical, and it behaves like a incandescent filament that emits light in all directions.
  • Each elementary reflector 16 has a hole 30 in through which the exit end section 22 of the fiber passes optic 14 associated therewith, and of which the stripped segment 24 is placed at the focal point of the elementary reflector 18.
  • a disadvantage of this type of optical system 10 is in that, to have better illumination of the targeted area, that is to say to obtain the least divergent beam possible, the set of elementary reflectors 18 must reflect a maximum of the rays which are emitted by the following segments 24 directions other than those desired. This implies a significant depth of each elementary reflector 18 and therefore a significant bulk of the optical system 10.
  • FIG. 2 shows an optical system 10 according to the invention.
  • This optical system 10 includes a light source 12 which emits a luminous flux, a series of optical fibers 14 which guide the light flux from the source of light 12 towards a reflecting surface 16 composed of a series of elementary reflectors 18.
  • Each optical fiber 14 has an inlet end 20 which receives part of the flow luminous and an outlet end section 22 which emits this same part of the light flux directly to a reflector elementary 18 associated with it.
  • the part of the light flux received by the input end of the fiber is emitted by the only transverse exit face 32 of the outlet end section.
  • This outlet face 32 is generally perpendicular to the axis of the end section of exit 22, and it is located at its free end.
  • the outlet face 32 can also be inclined relative to the axis of the outlet end section 22.
  • the part of the luminous flux is emitted from the face of output 32 in the form of a light brush 34.
  • the light brush 34 emerging from the exit face 32 is present in the form of a cone whose apex angle ⁇ is generally between 40 ° and 60 ° and its general axis A is perpendicular at the output face 32.
  • the optical system may include a network of optical fibers 14 associated with each elementary reflector 18. Each network then has an outlet face composed of the outlet faces 32 of the optical fibers 14, and this outlet face may have a complex shape defined according to the shape of the beam lighting to be obtained.
  • the outlet face has an upper side horizontal and straight, a lower side of length less than the length of the top side, and the width of the surface is decreasing as it approaches the lower side.
  • the shape of the exit face is circular or oval; to obtain the portion raised at 15 ° from the unified European passing beam, the exit side is rectangular shape inclined at 15 °.
  • the part of the luminous flux transported by each fiber optic 14 is emitted according to a luminous brush 34 of shape globally conical, which means that all light rays have a direction included in this cone, unlike the optical system 10 described in document FR-A-2,782,778, for which rays are emitted in all directions.
  • This combined with the fact that the light brush 34 is directed towards the elementary reflector 18 associated therewith, resulting in the large majority of light rays are reflected by the reflector elementary, without the depth of the elementary reflector 18 is important.
  • the reflecting surface 16 thus obtained then has a small longitudinal dimension.
  • the axis A of the brush luminous 34 is inclined to the horizontal at an angle acute ⁇ which is greater than half the angle at the apex ⁇ of light brush 34.
  • the outlet end sections 22 are located at below a horizontal plane P which is located at the level of the part lower of the reflecting surface 16.
  • each reflection surface 36 has a vertical generator 38 whose focal distance is high and its focus is preferably located at the level of the output face 32 associated with it, as can be see it in figure 3.
  • the position of the focal point of the vertical generator 38 depends on the beam which must to be obtained. So, for example, to have a beam of the type "crossing", the focus is located at the bottom of the exit face 32, and to have a beam of the "road” type, the hearth is located at the center of the outlet face 32.
  • the lateral distribution of the light beam is defined by the horizontal generator 40 of each reflection surface 36 as shown in Figure 4.
  • This generator horizontal 40 is designed convergently, this allows reduce the lateral dimensions of the light beam.
  • a protective glass 42 belonging to the lighthouse or fire, weak opening, which is generally impossible when using light sources arranged proximity to reflectors, especially due to problems thermal, gold, at the exit of optical fiber 14, the light is said “cold", that is to say that the optical fibers 14 do not transport not heat from light source 12.
  • the reflection surface 36 is divided into several surfaces of reflection, here a main reflection surface 36a and two secondary reflection surfaces 36b.
  • the main reflection surface 36a is designed in depending on the range of the optical system 10, in particular as regards concerns its focal length, and it is towards it that the axis A of light brush 34 is directed. Reflection surfaces secondary 36b form a wider and more luminous beam thick. They therefore have a focal length less than the distance focal length of the main reflection surface 36a.
  • the secondary reflection surfaces 36b are arranged transversely on either side of the reflection surface main 36a and symmetrically with respect to a vertical plane passing through the general axis of the light brush 34. They are arranged longitudinally between the reflecting surface main 36a and the output face 32 of the optical fiber 14 which associated with them.
  • the secondary reflection surfaces 36b are arranged so as to "recover" a secondary part 34b of the light brush 34, this secondary part 34b being complementary to the main part 34a of the light brush which is recovered by the main reflection surface 36a. This arrangement allows the entire light brush 34 to be used with reduced transverse width of the reflecting surface 36.
  • unit reflectors 18 located at the lateral ends of the reflective surface 16 may have only one secondary reflection surface 36b. This reflection surface secondary 36b is then arranged laterally towards the outside of the reflecting surface 16.
  • the light brush 34 emitted by the output face 32 is directed towards the front towards a deflection element, for example a mirror or prism, so that its axis A is directed indirectly towards the associated elementary reflector.
  • a deflection element for example a mirror or prism
  • plane P can consist of a one-way mirror that lets in the light flux coming from optical fibers 14 and which reflects the light rays directed towards optical fibers.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP02292396A 2001-09-27 2002-09-27 Optisches System zur Lichtbündel-Erzeugung unter Verwendung einer Serie von optischen Fasern Withdrawn EP1298386A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0112559A FR2830074B1 (fr) 2001-09-27 2001-09-27 Systeme optique pour la formation d'un faisceaux lumineux comportant une serie de fibres optiques
FR0112559 2001-09-27

Publications (1)

Publication Number Publication Date
EP1298386A1 true EP1298386A1 (de) 2003-04-02

Family

ID=8867760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02292396A Withdrawn EP1298386A1 (de) 2001-09-27 2002-09-27 Optisches System zur Lichtbündel-Erzeugung unter Verwendung einer Serie von optischen Fasern

Country Status (2)

Country Link
EP (1) EP1298386A1 (de)
FR (1) FR2830074B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022269095A1 (fr) * 2021-06-25 2022-12-29 Valeo Vision Module optique d'un système lumineux d'un véhicule automobile

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE815181C (de) * 1948-08-04 1951-10-01 Westinghouse Brake & Signal Optisches System fuer Beleuchtungssysteme, z. B. Lichtsignale
WO1990000420A1 (en) * 1988-07-13 1990-01-25 Adrian Charles Rowland Light delivery system
GB2238109A (en) * 1989-11-17 1991-05-22 Carello Spa Vehicle lighting assembly, particularly for motor vehicles
US5369554A (en) * 1993-01-07 1994-11-29 Ford Motor Company Illuminator utilizing multiple light guides
FR2782778A1 (fr) * 1998-09-01 2000-03-03 Valeo Vision Systeme d'eclairage centralise comprenant au moins un guide optique et guide optique pour systeme d'eclairage centralise

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE815181C (de) * 1948-08-04 1951-10-01 Westinghouse Brake & Signal Optisches System fuer Beleuchtungssysteme, z. B. Lichtsignale
WO1990000420A1 (en) * 1988-07-13 1990-01-25 Adrian Charles Rowland Light delivery system
GB2238109A (en) * 1989-11-17 1991-05-22 Carello Spa Vehicle lighting assembly, particularly for motor vehicles
US5369554A (en) * 1993-01-07 1994-11-29 Ford Motor Company Illuminator utilizing multiple light guides
FR2782778A1 (fr) * 1998-09-01 2000-03-03 Valeo Vision Systeme d'eclairage centralise comprenant au moins un guide optique et guide optique pour systeme d'eclairage centralise

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022269095A1 (fr) * 2021-06-25 2022-12-29 Valeo Vision Module optique d'un système lumineux d'un véhicule automobile
FR3124573A1 (fr) * 2021-06-25 2022-12-30 Valeo Vision Module optique d’un système lumineux d’un véhicule automobile

Also Published As

Publication number Publication date
FR2830074B1 (fr) 2004-04-02
FR2830074A1 (fr) 2003-03-28

Similar Documents

Publication Publication Date Title
EP1605201B1 (de) Kfz-Signal- und/oder Beleuchtungseinrichtung mit einem Lichtleiter
FR2995977B1 (fr) Guide de lumiere pour un dispositif d'eclairage et/ou de signalisation de vehicule automobile
FR2808868A1 (fr) Installation d'eclairage notamment feux de vehicule
FR2828727A1 (fr) Lampe de vehicule a diodes photoemissives
EP1338844A1 (de) Kfz-Signalleuchte mit einem optischen Teil, das selbst eine Signal-Funktion erfüllt
FR2899311A1 (fr) Unite de lampe de phare de vehicule
FR3050011A1 (fr) Module d'emission d'un faisceau lumineux pour projecteur de vehicule automobile
EP1416220A1 (de) Signalleuchte mit einem optichen System zur Sammlung und Verteilung des Lichtbündels nach einem ringförmigen Reflektor
FR2844033A1 (fr) Phare de vehicule a diagramme predetermine de distribution de lumiere
FR2564982A1 (fr) Embout de couplage d'un guide de lumiere a une source lumineuse, notamment pour un eclairage de ville integre a un ensemble projecteur pour automobile
EP2738453A1 (de) Lichtwellenleiter für eine optische Vorrichtung, insbesondere zur Beleuchtung und/oder Signalisierung
EP3071449B1 (de) Beleuchtungs- und/oder signalisierungssystem mit lichtleitern für ein fahrzeug
FR2925947A1 (fr) Dispositif d'eclairage de vehicule automobile
FR2863038A1 (fr) Phare de vehicule a trois reflecteurs
FR2742393A1 (fr) Feu de signalisation a encombrement axial reduit, notamment feu stop sureleve
FR2759764A1 (fr) Un projecteur a barreau optique pour vehicule automobile
EP1739468B1 (de) Beleuchtungs- oder Signalvorrichtung für Kraftfahrzeuge
EP2803903B1 (de) Signalleuchte für ein Kraftfahrzeug
FR2755210A1 (fr) Projecteur a conduit de lumiere pour vehicules automobiles
FR2733299A1 (fr) Dispositif d'eclairage ou de signalisation de vehicule, notamment automobile, a barreau optique
EP1298386A1 (de) Optisches System zur Lichtbündel-Erzeugung unter Verwendung einer Serie von optischen Fasern
FR3009065A1 (fr) Dispositif optique de vehicule automobile
EP1467143B1 (de) Kfz-Scheinwerfer mit Mitteln zur horizontalen Aufweitung des Lichtsbündels
FR2867257A1 (fr) Dispositif de signalisation et/ou d'eclairage pour vehicule automobile comportant un element dioptrique
FR2871550A1 (fr) Dispositif d'eclairage ou de signalisation a guide optique pour vehicule automobile

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20030730

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

17Q First examination report despatched

Effective date: 20060905

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20070316