FR2769971A1 - Diffusing lens for vehicle lights - Google Patents
Diffusing lens for vehicle lights Download PDFInfo
- Publication number
- FR2769971A1 FR2769971A1 FR9713176A FR9713176A FR2769971A1 FR 2769971 A1 FR2769971 A1 FR 2769971A1 FR 9713176 A FR9713176 A FR 9713176A FR 9713176 A FR9713176 A FR 9713176A FR 2769971 A1 FR2769971 A1 FR 2769971A1
- Authority
- FR
- France
- Prior art keywords
- light
- zone
- diffuser
- area
- convex
- 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
Links
- 239000012780 transparent material Substances 0.000 claims abstract description 4
- 238000009792 diffusion process Methods 0.000 claims description 4
- 230000011664 signaling Effects 0.000 claims description 4
- 239000000835 fiber Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
-
- 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
- F21S43/236—Light guides characterised by the shape of the light guide
- F21S43/239—Light guides characterised by the shape of the light guide plate-shaped
-
- 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
- F21S43/236—Light guides characterised by the shape of the light guide
- F21S43/241—Light guides characterised by the shape of the light guide of complex shape
-
- 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
-
- 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
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
La présente invention vise un diffuseur utilisable dans des feux de signalisation de véhicules. The present invention relates to a diffuser usable in vehicle signaling lights.
L'invention vise, plus particulièrement, des feux tels que feu de stop, lanterne arrière, feu de position, etc... The invention relates, more particularly, to lights such as brake light, rear lantern, position light, etc.
Ces feux comprennent généralement un réflecteur parabolique, une source de lumière telle qu'une lampe à incandescence ou une fibre optique et un verre optique destiné à répartir la lumière sur une zone déterminée. These lights generally include a parabolic reflector, a light source such as an incandescent lamp or an optical fiber and an optical glass intended to distribute the light over a determined area.
Dans de tels feux, une grande partie de la lumière émise est perdue et pratiquement on n'arrive pas à obtenir une répartition égale de la lumière sur la surface déterminée. In such lights, a large part of the light emitted is lost and practically it is not possible to obtain an equal distribution of the light over the determined surface.
La présente invention vise un diffuseur qui permet de remédier à ces inconvénients. The present invention relates to a diffuser which overcomes these drawbacks.
Le diffuseur, selon l'invention, se base sur la technique de l'optique fluide décrite dans le brevet français n" 2 689 961. The diffuser according to the invention is based on the technique of fluid optics described in French patent No. 2,689,961.
Le diffuseur, selon l'invention, est destiné à être utilisé avec une source de lumière et est caractérisé en ce qu'il est constitué d'une plaque d'un matériau transparent conformée pour présenter, à une extrémité, une zone d'entrée de la lumière, une face arrière présentant, au voisinage de la zone d'entrée de la lumière, une zone convexe prolongée par une zone de faible concavité s'étendant vers l'autre extrémité, tandis que le bord opposé à la face arrière constitue une face de diffusion de la lumière et comporte une série de lentilles cylindriques adjacentes les unes aux autres, la partie intermédiaire, située au voisinage des lentilles cylindriques, présentant une série d'ouvertures avec une extrémité située au droit des lignes de jonction des lentilles cylindriques entre elles, tandis que l'autre extrémité forme un dioptre plan, le bord de chaque ouverture, tourné du côté de la zone d'entrée de la lumière comportant une légère concavité tournée du côté de cette dite zone d'entrée et formant les faces latérales de renvoi des rayons lumineux vers les lentilles cylindriques. The diffuser according to the invention is intended to be used with a light source and is characterized in that it consists of a plate of transparent material shaped to present, at one end, an entry area of the light, a rear face having, in the vicinity of the light entry zone, a convex zone extended by a zone of weak concavity extending towards the other end, while the edge opposite to the rear face constitutes a light diffusing face and comprises a series of cylindrical lenses adjacent to each other, the intermediate part, located in the vicinity of the cylindrical lenses, having a series of openings with one end situated in line with the junction lines of the cylindrical lenses between them, while the other end forms a flat diopter, the edge of each opening, turned towards the side of the light entry zone comprising a slight concavi tee turned towards the side of this said entry zone and forming the lateral faces for returning the light rays towards the cylindrical lenses.
Une telle disposition fait appel à la technique de l'optique fluide et permet d'obtenir une diffusion sensiblement égale de la lumière sur toute la longueur de la plaque, le bord de chaque ouverture formant les faces latérales de renvoi des rayons lumineux vers les lentilles cylindriques étant formé par des génératrices en spirales logarithmiques. Such an arrangement calls upon the technique of fluid optics and makes it possible to obtain a substantially equal diffusion of light over the entire length of the plate, the edge of each opening forming the lateral faces for returning the light rays towards the lenses. cylindrical being formed by generators in logarithmic spirals.
La plaque peut être réalisée en un matériau transparent plastique rigide incolore ou légèrement coloré. The plate can be made of a transparent, colorless or slightly colored transparent plastic material.
De préférence, une partie au moins de la zone convexe de la face arrière est ondulée afin de former un dioptre arrière pour renvoyer les rayons lumineux vers les lentilles cylindriques via les faces latérales. Preferably, at least part of the convex region of the rear face is wavy in order to form a rear diopter to return the light rays to the cylindrical lenses via the side faces.
Suivant un détail particulier, la face de diffusion de lumière présente, à partir de la zone d'entrée de la lumière, une zone convexe, une zone sensiblement rectiligne et une zone terminale sensiblement convexe. According to a particular detail, the light scattering face has, from the light entry area, a convex area, a substantially straight area and a substantially convex end area.
L'invention va maintenant être décrite avec plus de détails en se référant à un mode de réalisation particulier donné à titre d'exemple seulement et représenté aux dessins annexés, dans lesquels
Figure 1 est une vue en plan d'un diffuseur, selon l'invention.The invention will now be described in more detail with reference to a particular embodiment given by way of example only and shown in the accompanying drawings, in which
Figure 1 is a plan view of a diffuser, according to the invention.
Figure 2 est une vue en coupe, suivant la ligne 2-2 de la figure l. Figure 2 is a sectional view along line 2-2 of Figure l.
Figures 3, 4 et 5 sont des vues schématiques montrant les trajets des rayons lumineux dans les différentes parties du diffuseur. Figures 3, 4 and 5 are schematic views showing the paths of the light rays in the different parts of the diffuser.
Le diffuseur, représenté aux figures, est réalisé dans une plaque d'une matière transparente, de préférence incolore, mais pour des applications déterminées, cette plaque pourrait être colorée en rouge, vert ou autre. The diffuser, shown in the figures, is made of a plate of a transparent material, preferably colorless, but for specific applications, this plate could be colored in red, green or other.
Le diffuseur est désigné par la référence 1 et présente une extrémité 2 constituant la zone d'entrée de la lumière, une source de lumière telle qu'une fibre optique, une lampe à incandescence avec un réflecteur convenable étant disposée au voisinage de cette zone. The diffuser is designated by the reference 1 and has one end 2 constituting the light entry zone, a light source such as an optical fiber, an incandescent lamp with a suitable reflector being arranged in the vicinity of this zone.
Le diffuseur 1 présente une face 3 de diffusion de la lumière qui comprend une zone 3a convexe, une zone 3b sensiblement rectiligne et une zone terminale 3c convexe. The diffuser 1 has a light diffusion face 3 which comprises a convex area 3a, a substantially straight area 3b and a convex end area 3c.
La face 3 présente une série de lentilles cylindriques 4. The face 3 has a series of cylindrical lenses 4.
Le diffuseur présente une face arrière 5 qui présente une zone convexe 5a prolongée jusqu'à l'extrémité opposée à la zone d'entrée 2 par une partie concave 5b. The diffuser has a rear face 5 which has a convex zone 5a extended to the end opposite to the entry zone 2 by a concave part 5b.
Au voisinage de la face 3, dans l'épaisseur du diffuseur, sont découpées des ouvertures identiques 7 qui présentent toutes une extrémité 7a située au droit des lignes de jonction des lentilles cylindriques 4. In the vicinity of face 3, in the thickness of the diffuser, are cut identical openings 7 which all have an end 7a situated at the right of the junction lines of the cylindrical lenses 4.
Chaque ouverture 7 détermine une face latérale 7d destinée à renvoyer la lumière vers les lentilles cylindriques 4. Each opening 7 determines a lateral face 7d intended to return the light towards the cylindrical lenses 4.
Les extrémités 7c des ouvertures 7, opposées aux extrémités 7a, forment des dioptres plans de transfert de la lumière, tandis que la partie 7b des ouvertures 7 forme un arc en spirale logarithmique 7d. The ends 7c of the openings 7, opposite the ends 7a, form flat light transfer diopters, while the part 7b of the openings 7 forms a logarithmic spiral arc 7d.
La plaque constituant le diffuseur peut être par découpage, moulage ou autre extrusion. The plate constituting the diffuser can be by cutting, molding or other extrusion.
Comme on le voit aux figures 3, 4 et 5, la source de lumière est située au droit de la zone d'entrée 2, la zone 5a présentant une légère ondulation, elle constitue un dioptre arrière destiné à assurer le mixage de la lumière. As can be seen in FIGS. 3, 4 and 5, the light source is located at the right of the entry zone 2, the zone 5a having a slight undulation, it constitutes a rear diopter intended to ensure the mixing of the light.
Les rayons qui sont dirigés vers la zone Sa sont renvoyés vers les lentilles cylindriques 4, s'ils rencontrent les dioptres plans 7c, ils sont renvoyés vers la zone 5b qui constitue un dioptre intermédiaire et ainsi finissent par rencontrer les faces latérales 7d pour être diffusés par les lentilles cylindriques correspondantes. The rays which are directed towards the zone Sa are returned towards the cylindrical lenses 4, if they meet the plane diopters 7c, they are returned towards the zone 5b which constitutes an intermediate diopter and thus end up meeting the lateral faces 7d to be diffused by the corresponding cylindrical lenses.
Les rayons qui sont directement dirigés vers les faces latérales 7d sont automatiquement éjectés par les lentilles cylindriques. The rays which are directly directed towards the lateral faces 7d are automatically ejected by the cylindrical lenses.
Bien entendu, l'invention n'est pas limitée au mode de réalisation qui vient d'être décrit et représenté. On pourra y apporter de nombreuses modifications de détail sans sortir pour cela du cadre de l'invention. Of course, the invention is not limited to the embodiment which has just been described and shown. Many detailed modifications can be made without departing from the scope of the invention.
Claims (3)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9713176A FR2769971B1 (en) | 1997-10-21 | 1997-10-21 | VEHICLE SIGNAL LIGHT DIFFUSER |
EP98402602A EP0911574B1 (en) | 1997-10-21 | 1998-10-20 | Light diffuser for vehicle signal lights |
DE69833421T DE69833421T2 (en) | 1997-10-21 | 1998-10-20 | Light emission optics for vehicle signal lights |
ES98402602T ES2257799T3 (en) | 1997-10-21 | 1998-10-20 | DIFFUSER OF VEHICLE SIGNALING PILOTS. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9713176A FR2769971B1 (en) | 1997-10-21 | 1997-10-21 | VEHICLE SIGNAL LIGHT DIFFUSER |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2769971A1 true FR2769971A1 (en) | 1999-04-23 |
FR2769971B1 FR2769971B1 (en) | 1999-12-31 |
Family
ID=9512469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9713176A Expired - Fee Related FR2769971B1 (en) | 1997-10-21 | 1997-10-21 | VEHICLE SIGNAL LIGHT DIFFUSER |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2769971B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2045515A1 (en) * | 2007-10-04 | 2009-04-08 | Valeo Vision | Lighting or signalling device for an automobile |
EP2735789A2 (en) * | 2012-11-26 | 2014-05-28 | Bang & Olufsen A/S | Lens arrangement with light guide and internal reflecting elements |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991003682A1 (en) * | 1989-09-08 | 1991-03-21 | Queensland University Of Technology | Illuminating apparatus |
GB2274158A (en) * | 1993-01-07 | 1994-07-13 | Ford Motor Co | Low profile illuminator |
-
1997
- 1997-10-21 FR FR9713176A patent/FR2769971B1/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991003682A1 (en) * | 1989-09-08 | 1991-03-21 | Queensland University Of Technology | Illuminating apparatus |
GB2274158A (en) * | 1993-01-07 | 1994-07-13 | Ford Motor Co | Low profile illuminator |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2045515A1 (en) * | 2007-10-04 | 2009-04-08 | Valeo Vision | Lighting or signalling device for an automobile |
FR2921999A1 (en) * | 2007-10-04 | 2009-04-10 | Valeo Vision Sa | LIGHTING OR SIGNALING DEVICE FOR MOTOR VEHICLE. |
US8920006B2 (en) | 2007-10-04 | 2014-12-30 | Valeo Vision | Lighting or signaling device for a motor vehicle |
EP2735789A2 (en) * | 2012-11-26 | 2014-05-28 | Bang & Olufsen A/S | Lens arrangement with light guide and internal reflecting elements |
EP2735789A3 (en) * | 2012-11-26 | 2014-12-03 | Bang & Olufsen A/S | Lens arrangement with light guide and internal reflecting elements |
Also Published As
Publication number | Publication date |
---|---|
FR2769971B1 (en) | 1999-12-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CA | Change of address | ||
CD | Change of name or company name | ||
CJ | Change in legal form | ||
ST | Notification of lapse |
Effective date: 20140630 |