FR2607222A2 - Reflector for motor vehicle headlamp with improved main beam - Google Patents

Reflector for motor vehicle headlamp with improved main beam Download PDF

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Publication number
FR2607222A2
FR2607222A2 FR8616319A FR8616319A FR2607222A2 FR 2607222 A2 FR2607222 A2 FR 2607222A2 FR 8616319 A FR8616319 A FR 8616319A FR 8616319 A FR8616319 A FR 8616319A FR 2607222 A2 FR2607222 A2 FR 2607222A2
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FR
France
Prior art keywords
reflector
reflection
rays
juxtaposition
facets
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
FR8616319A
Other languages
French (fr)
Other versions
FR2607222B2 (en
Inventor
Rene Le Creff
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.)
Signal Vision SA
Original Assignee
Signal Vision SA
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 Signal Vision SA filed Critical Signal Vision SA
Priority to FR868616319A priority Critical patent/FR2607222B2/en
Priority to US07/068,291 priority patent/US4794504A/en
Priority to ES198787109641T priority patent/ES2034996T3/en
Priority to DE8787109641T priority patent/DE3782562D1/en
Priority to EP87109641A priority patent/EP0253243B1/en
Priority to JP62176086A priority patent/JP2787444B2/en
Publication of FR2607222A2 publication Critical patent/FR2607222A2/en
Application granted granted Critical
Publication of FR2607222B2 publication Critical patent/FR2607222B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32Optical layout thereof
    • F21S41/33Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/338Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having surface portions added to its general concavity

Abstract

The invention relates to a reflector in accordance with Claim 1 of the main patent. The reflector according to the addition is characterised in that the juxtaposition, dimensional evolution and orientation of the oriented reflected microfacets 20 define, for part or all of the staggered elements 7 and part or all of the reflecting surface of each of the said staggered steps 7, a monotonic evolute surface. Application to the car industry.

Description

Réflecteur pour projecteur de véhicule automobile à faisceau route amélioré.Reflector for motor vehicle headlamp with improved road beam.

La présente addition concerne des perfectionnements au réflecteur selon le brevet principal permettant d'améliorer encore le faisceau d'éclairage, en particulier le faisceau "croisement" lorsque le réflecteur est à double fonction, ou bien est adapté à assurer cette fonction.The present addition relates to improvements to the reflector according to the main patent, making it possible to further improve the lighting beam, in particular the "crossing" beam when the reflector has a dual function, or else is adapted to perform this function.

Le brevet principal a pour objet un réflecteur pour projecteur de véhicule automobile comprenant un quadrique réfléchissant sensiblement paraboloîdique de révolution coupé par des plans de troncature supérieur et inférieur, un filament de lampe électrique étant placé sensiblement au foyer dudit quadrique pour assurer l'éclairage route par la réflexion sur ledit quadrique des faisceaux lumineux émis par ledit filament et traversée d'une glace optique placée en avant dudit quadrique, caractérisé par le fait qu'au moins le plan de troncature inférieur du réflecteur est pourvu, sur sa surface intérieure éclairée par le filament route de la lampe de génération lumineuse, de pluralité d'éléments sphériques réfléchissants, échelonnés selon une disposition concentrique comparable aux échelons de fresnel par rapport à leur axe commun passant par le foyer de la conique réfléchissante utile du réflecteur, ce foyer étant aussi leur centre commun.The main patent relates to a reflector for a motor vehicle headlamp comprising a substantially paraboloid reflective quadric of revolution cut by upper and lower truncation planes, an electric lamp filament being placed substantially at the focus of said quadric to ensure road lighting by the reflection on the said quadric of the light beams emitted by the said filament and crossed by an optical glass placed in front of the said quadric, characterized in that at least the lower truncation plane of the reflector is provided, on its inner surface illuminated by the filament route of the light generation lamp, of plurality of spherical reflecting elements, staggered in a concentric arrangement comparable to the fresnel rungs with respect to their common axis passing through the focal point of the useful reflective conic of the reflector, this focal point also being their common center.

Pour atteindre le résultat voulu par la présente addition, ce réflecteur est caractérisé par le fait que chaque surface réfléchissante des éléments sphériques échelonnés du réflecteur est constituée par la juxtaposition de pluralité de micro-facettes orientées individuellement de manière à réfléchir les rayons incidents, rayons croisement et/ou route captés qu'elles doivent renvoyer sur la surface utile de la conique du quadrique, avec une déviation d'angle de réflexion telle que ces rayons réfléchis évitent la traversée du ballon de lampe et viennent après une seconde réflexion par la zone correspondante de surface réflechissante utile de la conique-réflecteur, compléter et homogénéiser le faisceau d'éclairage fondamental obtenu par la réflexion des seuls rayons de la source lumineuse éclairant directement la surface réfléchissante de ladite conique principale du réflecteur.To achieve the result desired by this addition, this reflector is characterized in that each reflecting surface of the spherical stepped elements of the reflector is formed by the juxtaposition of plurality of micro-facets individually oriented so as to reflect the incident rays, crossing rays and / or captured route which they must return to the useful surface of the conic section of the quadric, with a deviation in the angle of reflection such that these reflected rays avoid crossing the lamp balloon and come after a second reflection through the corresponding zone of useful reflecting surface of the conical-reflector, complete and homogenize the fundamental lighting beam obtained by the reflection of only the rays of the light source directly illuminating the reflecting surface of said main conical of the reflector.

De préférence, la juxtaposition, l'évolution dimensionnelle et l'orientation des micro-facettes réflechissantes orientées determinent, pour partie ou totalité des éléments échelonnés et partie ou totalité de la surface de réflexion de chacun desdits échelons, une surface évolutive monotone.Preferably, the juxtaposition, the dimensional evolution and the orientation of the oriented reflective micro-facets determine, for part or all of the staggered elements and part or all of the reflection surface of each of said steps, a monotonous evolving surface.

L'invention sera bien comprise à la lecture de la description suivante faite en se référant au dessin annexé dont la figure unique est un schéma d'un système réfléchissant selon un exemple de réalisation de l'invention.The invention will be clearly understood on reading the following description made with reference to the accompanying drawing, the single figure of which is a diagram of a reflecting system according to an exemplary embodiment of the invention.

Le réflecteur 1 comporte un orifice arrière 3 recevant une lampe 4 dont le filament C émet des raypns incidents il, i2 vers l'avant et i'l, i'2 vers l'arrière. Les rayons i'l, i' 2 sont réfléchis sur le réflecteur 1 formé par une conique réfléchissante 10 et dont la trace du plan focal vertical est figurée en T.The reflector 1 has a rear orifice 3 receiving a lamp 4, the filament C of which emits incident rays il, i2 towards the front and i'l, i'2 towards the rear. The rays i'l, i '2 are reflected on the reflector 1 formed by a reflecting conical 10 and the trace of the vertical focal plane of which is shown in T.

Le plan de troncature P comporte des éléments sphériques échelonnés 7 qui, conformément à l'invention, sont constitu és par une pluralité de micro-facettes 20 orientées de telle maniere que les rayons réfléchis rl .et r2 des rayons incidents il et i2, selon les angles d1 et d2 respectivement, viennent se réfléchir sur la conique 10 sans avoir traversé le ballon 4' de la lampe 4 et viennent ainsi compléter et homogénéiser le faisceau des rayons directement réfléchis par la conique et provenant des rayons incidents i'l et 2 Dans le cas d'utilisation d'une lampe tifonction non représenté au dessin, les rayons issus du filament route auraient également des réflexions sur les échelons 7 sans traversée de la lampe 4.The truncation plane P comprises spherical staggered elements 7 which, according to the invention, are constituted by a plurality of micro-facets 20 oriented in such a way that the reflected rays rl. And r2 of the incident rays il and i2, according to the angles d1 and d2 respectively, are reflected on the conical section 10 without having crossed the balloon 4 'of the lamp 4 and thus complement and homogenize the beam of rays directly reflected by the conical section and coming from the incident rays i'l and 2 If a multifunction lamp not shown in the drawing is used, the spokes from the road filament would also have reflections on the rungs 7 without crossing the lamp 4.

De préférence, au moins une partie des micro-facettes 20 détermine une surface evolutive monotone. Preferably, at least part of the micro-facets 20 determines a monotonous evolving surface.

Claims (2)

REVENDICATIONS 1.- Réflecteur selon la revendication 1 du brevet principal, caractérisé par le fait que chaque surface refléchissante des éléments sphériques échelonnes (7) du réflecteur est constituée par la juxtaposition de pluralite de micro-facettes (20) orientées individuellement de manière à réfléchir les rayons incidents (i1,i2), rayons croisement et/ou route captés qu'elles doivent renvoyer sur la surface utile de la conique (10) du quadrique, avec une déviation (dl, d2) d'angle de réflexion telle que ces rayons réfléchis (r1,r2) évitent la traversée du ballon (4') de lampe (4) et viennent après une seconde réflexion par la zone correspondante de surface réfléchissante (10) utile de la conique-réflecteur, compléter et homogénéiser le faisceau d'éclairage fondamental obtenu par la réflexion des seuls rayons ti'l,i'2) de la source lumineuse (C) éclairant directement la surface réfléchissante de ladite conique principale (10) du réflecteur (1).1.- reflector according to claim 1 of the main patent, characterized in that each reflective surface of the stepped spherical elements (7) of the reflector is constituted by the juxtaposition of pluralities of micro-facets (20) oriented individually so as to reflect the incident rays (i1, i2), crossing and / or traveling rays which they must return to the useful surface of the conic section (10) of the quadric, with a deviation (dl, d2) of angle of reflection such as these rays reflected (r1, r2) avoid the crossing of the balloon (4 ') of lamp (4) and come after a second reflection by the corresponding zone of reflective surface (10) useful of the conical-reflector, complete and homogenize the beam of fundamental lighting obtained by the reflection of only the rays ti'l, i'2) of the light source (C) directly illuminating the reflecting surface of said main conical section (10) of the reflector (1). 2.- Réflecteur selon la revendication 1, caractérisé par le fait que la juxtaposition, l'évolution dimensionnelle et l'orientation des micro-facettes réflechissantes (20) orientées déterminent, pour partie ou totalité des éléments échelonnés (7) et partie ou totalité de la surface de réflexion de chacun desdits échelons (7), une surface évolutive monotone. 2.- reflector according to claim 1, characterized in that the juxtaposition, the dimensional evolution and the orientation of the reflective micro-facets (20) oriented determine, for part or all of the staggered elements (7) and part or all from the reflection surface of each of said steps (7), a monotonous evolving surface.
FR868616319A 1986-07-16 1986-11-24 REFLECTOR FOR A MOTOR VEHICLE PROJECTOR WITH IMPROVED ROAD BEAM Expired - Lifetime FR2607222B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR868616319A FR2607222B2 (en) 1986-11-24 1986-11-24 REFLECTOR FOR A MOTOR VEHICLE PROJECTOR WITH IMPROVED ROAD BEAM
US07/068,291 US4794504A (en) 1986-07-16 1987-07-01 Reflector for automobile headlight with improved full beam
ES198787109641T ES2034996T3 (en) 1986-07-16 1987-07-04 REFLECTOR FOR CAR HEADLIGHT WITH PERFECTED LONG LIGHT.
DE8787109641T DE3782562D1 (en) 1986-07-16 1987-07-04 REFLECTOR FOR VEHICLE HEADLIGHTS WITH IMPROVED HIGH LIGHTS.
EP87109641A EP0253243B1 (en) 1986-07-16 1987-07-04 Reflector for motor vehicle headlamps with a modified main beam
JP62176086A JP2787444B2 (en) 1986-07-16 1987-07-16 Reflectors for automotive headlights

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR868616319A FR2607222B2 (en) 1986-11-24 1986-11-24 REFLECTOR FOR A MOTOR VEHICLE PROJECTOR WITH IMPROVED ROAD BEAM

Publications (2)

Publication Number Publication Date
FR2607222A2 true FR2607222A2 (en) 1988-05-27
FR2607222B2 FR2607222B2 (en) 1990-12-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR868616319A Expired - Lifetime FR2607222B2 (en) 1986-07-16 1986-11-24 REFLECTOR FOR A MOTOR VEHICLE PROJECTOR WITH IMPROVED ROAD BEAM

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FR (1) FR2607222B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3940437A1 (en) * 1988-12-15 1990-06-21 Valeo Vision Two=part plastics reflector for vehicle lamp unit - has part supporting lamp fitting inserted axially in central opening in second part

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1394319A (en) * 1920-01-15 1921-10-18 Fred Earl Fuller Headlight-reflector
US1723535A (en) * 1927-03-25 1929-08-06 Redirected Light Corp Of Ameri Headlight
FR2208089A1 (en) * 1972-11-24 1974-06-21 Laribe Armand

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1394319A (en) * 1920-01-15 1921-10-18 Fred Earl Fuller Headlight-reflector
US1723535A (en) * 1927-03-25 1929-08-06 Redirected Light Corp Of Ameri Headlight
FR2208089A1 (en) * 1972-11-24 1974-06-21 Laribe Armand

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3940437A1 (en) * 1988-12-15 1990-06-21 Valeo Vision Two=part plastics reflector for vehicle lamp unit - has part supporting lamp fitting inserted axially in central opening in second part
DE3940437C2 (en) * 1988-12-15 1999-04-08 Valeo Vision Lighting device for a motor vehicle with a two-part reflector

Also Published As

Publication number Publication date
FR2607222B2 (en) 1990-12-07

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