EP2886943A1 - Optisches System, entsprechende Vorrichtung und entsprechende Ständerleuchte - Google Patents

Optisches System, entsprechende Vorrichtung und entsprechende Ständerleuchte Download PDF

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Publication number
EP2886943A1
EP2886943A1 EP14199013.5A EP14199013A EP2886943A1 EP 2886943 A1 EP2886943 A1 EP 2886943A1 EP 14199013 A EP14199013 A EP 14199013A EP 2886943 A1 EP2886943 A1 EP 2886943A1
Authority
EP
European Patent Office
Prior art keywords
optical system
illuminated
light source
light beam
optical
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Withdrawn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
EP14199013.5A
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English (en)
French (fr)
Inventor
Paul Queveau
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.)
AL-Babtain France Sas
Al Babtain France SAS
Original Assignee
AL-Babtain France Sas
Al Babtain France 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 AL-Babtain France Sas, Al Babtain France SAS filed Critical AL-Babtain France Sas
Publication of EP2886943A1 publication Critical patent/EP2886943A1/de
Withdrawn legal-status Critical Current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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/09—Optical design with a combination of different curvatures
    • 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
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads

Definitions

  • the present invention relates to the field of lighting.
  • the invention relates to an optical system, in particular for public lighting streetlights or for the lighting of public buildings.
  • These lighting systems can comprise one or more light sources directed towards the surface to be illuminated, the lighting systems being able to be placed on a support which can be for example a pole of lamp post.
  • the invention particularly aims to solve at least some of the disadvantages of the prior art.
  • Another objective of at least one embodiment of the invention is to provide an optical system for obtaining substantially uniform illumination of the surfaces to be illuminated.
  • Yet another objective of at least one embodiment is to provide such a system which is inexpensive to implement and easy to use.
  • the invention proposes a new and inventive approach that makes it possible to solve at least in part the disadvantages of the prior art.
  • the invention makes it possible to redirect the light coming from the light source while limiting the loss of illumination by the use of a refractive lower part, which thus directly deviates the portion of the luminous flux which crosses it towards the surface. to illuminate, bonded to a reflective upper part which indirectly deflects the complementary portion of the luminous flux.
  • the lower part is the part of the part which is closest to the surface to be illuminated, while the upper part corresponds to the part farthest from the surface. to illuminate, the sum of the two parts forming the entire body of the optical system.
  • the lower part is formed in the rear area of the system. In other words, the lower part is formed in the area closest to the light source.
  • the housing is formed at the location of the rear zone of the system, between the upper and lower parts.
  • the lower portion has at least one substantially convex profile section.
  • This section may for example be oriented so that for a majority of points of the profile, there is a tangent which is external to the lower part.
  • the first portion has at least one substantially convex profile section.
  • This section may for example be oriented so that for a majority of points of the profile, there is a tangent that is outside the first portion.
  • the second portion has, in a plane orthogonal to the surface to be illuminated passing through the optical axis of the light source, a symmetrical profile.
  • the second portion may have a profile in the form of a free surface.
  • the second portion extends substantially to a substantially planar end located at the optical axis of the light source.
  • the upper portion further has a third portion formed in the vicinity of the second portion and connected to said second portion at the end thereof.
  • the optical system further comprises at least one centering pin, said centering pin facilitating the positioning of said system.
  • the system further comprises means for homogenizing the light reflected by the upper part.
  • this provides a homogeneous light output of the optical system and to the surface to be illuminated.
  • the device comprises protection means at least partially covering said lighting device.
  • optical systems implemented on the lighting device are protected from the various constraints of their evolution environment.
  • the invention also relates to a public street lamp comprising a mast on which are placed several lighting devices according to one of the aforementioned embodiments.
  • the protection means are connected to the mast by sealed connection means isolating the lighting devices at least at the respective upper surfaces of each of said optical systems.
  • the optical system 1 is adapted to be traversed by a light beam from a light source 9 having an optical axis ⁇ .
  • This light source 9 and this optical system 1 are placed so that the optical axis ⁇ is substantially parallel to the surface to be illuminated (not shown in the various figures).
  • This surface to be illuminated may for example be the ground or a monument.
  • the light source may for example be composed of one or more light-emitting diodes (otherwise called LEDs or LEDs thereafter). However, it is possible to provide other embodiments in which other lighting means would be used.
  • the optical system 1 has a body 8 and is therefore traversed by a light beam from a light source 9.
  • This light beam passes through the optical system 1 from a rear zone 10 to a front zone 11.
  • rear zone 10 the area that is the most left on the figure 2 .
  • front zone 11 of the optical system 1 is the zone which is on the right on the figure 2 .
  • the rear zone 10 is the zone located near the light source 9 and which is therefore crossing before the front zone 11 which is the zone furthest from the light source 9.
  • the light source 9 is placed in a housing 4 formed in the body 8 of the optical system 1.
  • This housing 4 is formed between the upper 3 and lower 2.
  • the majority of the housing 4 is formed at the top 3 and therefore a smaller part is formed at the bottom.
  • This housing 4 has, at the level formed in the upper part 3, a cylindrical profile, therefore symmetrical, around the optical axis ⁇ of the light source.
  • the part formed in the lower part 2 has a curved profile.
  • the lower part 2 of the optical system 1 is said to be transmissive, that is to say, it deflects the light rays that pass through it.
  • the lower part 2 at least partially refracts the light beam coming from the light source 9. More particularly, the lower part 2 refracts the light beam arriving at the lower part (the lower part of the optical system 1 as illustrated in the different figures).
  • the lower part is only partially refractive.
  • the lower portion 2 is integrally formed in the rear area of the optical system.
  • the entire lower part 2 is included in the rear zone 10 of the optical system 1.
  • embodiments could be provided in which at least a portion of the lower part 2 would belong to the front zone 11 of the system.
  • the lower portion 2 has a substantially convex profile section oriented such that for a majority of points of the profile, there is a tangent which is external to the lower portion 2. In other words, this lower portion 2 is curved outward of optical system profile 1.
  • the upper part 3 is said reflective, that is to say, it reflects the rays incident on this part. This reflection can for example be achieved by means of mirrors placed on the inner face of this upper surface, vis-à-vis the rays coming from the light source.
  • this upper part 3 is joined to the lower part 2 so that all or at least the vast majority of the light beam from the light source 9 is directed towards the surface to be illuminated.
  • the upper part is joined to the lower part so that these two parts deviate the entire light beam from the light source.
  • the first portion 31 has a substantially convex profile section oriented so that for a majority of points of the profile, there is a tangent which is external to the first portion.
  • the first portion 31 illustrated in this embodiment has an outwardly curved profile, and more specifically a slightly curved profile.
  • This first portion also has a symmetry of revolution about the optical axis ⁇ of the light source 9.
  • the second portion 32 which is connected to the first portion 31 and which is formed in the front zone 10 of the system 1, it has a profile in the form of a free surface.
  • the free surface otherwise called “freeform” surface is substantially close to a bell-shaped or Gaussian form.
  • This second portion 32 presents, in particular as illustrated in figure 3 , a profile symmetrical with respect to a plane orthogonal to the surface to be illuminated passing through the optical axis ⁇ of the light source 9. As a result, this makes it possible to provide illumination of the surface to be illuminated substantially symmetrical with respect to the optical axis ⁇ of the light source 9.
  • the second portion 32 extends substantially to a plane end 321 located at the optical axis ⁇ of the light source 9, and parallel to the optical axis. In other words, and relying on the figure 2 the second portion 32 extends to this end which forms a horizontal segment, the optical axis ⁇ being also arranged horizontally.
  • the upper portion 3 further has a third portion 33 which is connected to the second portion 32 at the location of its end 321.
  • This third portion 33 extends so that the upper portions and lower deviate the entire light beam, or at least a large part of this light beam.
  • this third portion 33 has a wedge shape, or a substantially symmetrical triangular shape, and thus allows, thanks to this shape, to limit the parasitic lights that could come to find the light beam coming out of the optical system 1.
  • the optical system further comprises means for homogenization (not shown in the figures) of the light reflected by the upper part 3.
  • these homogenizing means are in the form of a wall implemented between the upper 3 and lower 2 parts, at the third portion 33 and parallel to the optical axis ⁇ of the light source 9.
  • This wall may comprise for example a plurality of cylindrical lenses arranged regularly on the wall.
  • the upper 3 and lower 2 parts are connected together by means of solidification 15 of the optical system.
  • These solidification means 15 are in this example two ears used on both sides of these two parts, these means not being involved in the deviation of light by the optical system 1.
  • These solidification means 15 can, in addition to increasing the rigidity and strength of the system, improve the manipulation and installation of the optical system on a lighting device.
  • the optical system 1 comprises at least one centering pin 18 to facilitate the positioning of the optical system on a lighting device.
  • two centering pins 18 are implemented at the rear zone of the optical system, not far from the housing 4.
  • the lighting street lamp 7 includes several lighting devices.
  • These devices are placed on the lighting lamppost 7 at a masthead 71, itself connected to a mast 70 to place the device away from the surface to be illuminated.
  • the mast 70 of the street lamp makes it possible to place the optical systems 1 and thus the lighting devices at a distance from the ground, which here represents the surface to be illuminated.
  • the lighting devices are aligned in columns, that is to say in a direction perpendicular to the surface to be illuminated, which corresponds in the case of the roadway to a substantially vertical direction.
  • the lamp post illustrated in this figure 4 thus comprises five lighting devices aligned vertically.
  • the lighting devices would be distributed in line (that is to say substantially parallel to the surface to be illuminated) or in several columns juxtaposed.
  • the devices each comprise a protection means 72 at least partially covering the lighting device. More particularly, and as illustrated in figure 4 the means of protection consist of "caps". Each cap has a curved profile allowing the entire top part of the optical systems 1 to be completely covered. Of course, embodiments could be provided in which the protection means would have another shape. covering a larger or smaller part of the optical systems. One could even provide an embodiment in which a single means of protection would be implemented for all lighting devices.
  • protection means are connected to the mast by means of sealed connection, such as a seal or a flexible plastic part, these connecting means insulating the lighting devices at least at the respective upper portions of each of the optical systems.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP14199013.5A 2013-12-20 2014-12-18 Optisches System, entsprechende Vorrichtung und entsprechende Ständerleuchte Withdrawn EP2886943A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1363240A FR3015633A1 (fr) 2013-12-20 2013-12-20 Systeme optique, dispositif et lampadaire associes

Publications (1)

Publication Number Publication Date
EP2886943A1 true EP2886943A1 (de) 2015-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14199013.5A Withdrawn EP2886943A1 (de) 2013-12-20 2014-12-18 Optisches System, entsprechende Vorrichtung und entsprechende Ständerleuchte

Country Status (2)

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EP (1) EP2886943A1 (de)
FR (1) FR3015633A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6536921B1 (en) * 1993-01-21 2003-03-25 Jerome H. Simon Architectural lighting distributed from contained radially collimated light and compact efficient luminaires
US20100195330A1 (en) * 2009-01-30 2010-08-05 Gary Eugene Schaefer Reflector alignment recess
EP2644978A2 (de) * 2010-11-26 2013-10-02 WK Inc. Led-beleuchtungsvorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6536921B1 (en) * 1993-01-21 2003-03-25 Jerome H. Simon Architectural lighting distributed from contained radially collimated light and compact efficient luminaires
US20100195330A1 (en) * 2009-01-30 2010-08-05 Gary Eugene Schaefer Reflector alignment recess
EP2644978A2 (de) * 2010-11-26 2013-10-02 WK Inc. Led-beleuchtungsvorrichtung

Also Published As

Publication number Publication date
FR3015633A1 (fr) 2015-06-26

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