EP2108089B1 - Élément d'éclairage avec structure de fresnel réfléchissante - Google Patents

Élément d'éclairage avec structure de fresnel réfléchissante Download PDF

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Publication number
EP2108089B1
EP2108089B1 EP08700855.3A EP08700855A EP2108089B1 EP 2108089 B1 EP2108089 B1 EP 2108089B1 EP 08700855 A EP08700855 A EP 08700855A EP 2108089 B1 EP2108089 B1 EP 2108089B1
Authority
EP
European Patent Office
Prior art keywords
light
fresnel structure
illuminated
reflective
directed
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.)
Active
Application number
EP08700855.3A
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German (de)
English (en)
Other versions
EP2108089A1 (fr
Inventor
Hans-Martin Bitzer
Frank KÜHNLENZ
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.)
Orafol Fresnel Optics GmbH
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Orafol Fresnel Optics GmbH
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Application filed by Orafol Fresnel Optics GmbH filed Critical Orafol Fresnel Optics GmbH
Publication of EP2108089A1 publication Critical patent/EP2108089A1/fr
Application granted granted Critical
Publication of EP2108089B1 publication Critical patent/EP2108089B1/fr
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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
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • 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
    • F21V7/05—Optical design plane
    • 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

Definitions

  • the invention relates to lighting elements with a reflective Fresnel structure, with which light from a light source is directed onto a reflective element provided with a Fresnel structure and is reflected from there to illuminate a surface.
  • the desired effect can often not be achieved because, for example, the room heights are not sufficiently large or an application to lighting elements, such as e.g. Table lamps, to prevent an exploitation of this effect.
  • An inventive lighting element is designed so that light from a light source is directed onto a reflective element provided with a Fresnel structure and is reflected from there to illuminate a surface.
  • the Fresnel structure is formed faceted in a region about the optical axis of the light source, wherein deviating flank angles of effective surfaces of the Fresnel structure are present.
  • the effect can also be achieved alone or additionally by forming an unstructured region at the outer edge of the reflective element about a region which is provided with a Fresnel structure, from which light into the region Area of the outer edge of the surface to be illuminated is reflected, so that the illumination of this outer edge of the surface to be illuminated can be carried out both with reflected light from the Fresnel structure, as well as the unstructured area reflected light.
  • a faceted Fresnel structure may be formed such that light from active surfaces in the vicinity of the optical axis is reflected further to the outer edge of the surface to be illuminated than is the case from active surfaces at a greater distance from the optical axis.
  • the faceted Fresnel structure may be formed such that flank angles of active surfaces are alternately larger and smaller and light with the larger flank angles with respect to the optical axis can be reflected to the outer edge of the surface to be illuminated.
  • a non-structured region of the reflective, preferably formed on the edge of a Fresnel structure Element may have a planar planar, a convex or concave curved surface, which may be inclined or curved, taking into account the divergence of incident light, optionally the refractive index of the material from which a reflective element is formed.
  • the illumination element according to the invention can also be advantageously designed so that collimated light is directed to the respective reflective element. This can be achieved, for example, with a collimating optical element arranged between the respective light source and the reflecting element.
  • a reflective element which can be used on an illumination element according to the invention can be formed from an optically transparent material.
  • the outer surface of the Fresnel structure may then be provided with a reflective coating.
  • a reflective element used in a lighting element according to the invention can also be formed linearly formed active edges of a Fresnel structure.
  • FIG. 1 is intended to exemplify the reflection of light on a reflective element 3 waiving a light source 1 and directed by her to a reflective element 3 light example.
  • the reflective element 3 has a faceted Fresnel structure. This is with the facets A and B in the example FIG. 1 realized.
  • the optical axis which with the dashed line is illustrated, formed on the outer edge of the reflective element 3 faceted Fresnel structures B light is at least predominantly reflected in an outer edge region of a surface to be illuminated 4.
  • the light divergently emitted by the light source 1 is directed by means of a collimating optical element 1 'at least approximately parallel to a plane, planar and here perpendicular to the optical axis oriented surface of a reflective element 3.
  • the light source 1 facing away from the surface of the reflective element 3 has a faceted Fresnel structure according to the invention and is provided with a reflective coating.
  • the reflection of light which is again directed here in collimated form by a light source 1, not shown, on the reflective element 3, to be illustrated.
  • the faceted Fresnel structure is formed on the light source 1 facing away from the surface of the reflective element 3.
  • the reflective optical element 3 is formed from an optically transparent material, the refraction of the light reflected by the Fresnel structure can be additionally exploited on exiting the reflective element 3, taking advantage of the different refractive indices.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)

Claims (7)

  1. Elément d'éclairage avec une structure de Fresnel réfléchissante, dans lequel la lumière d'une source de lumière (1) est dirigée vers un élément réfléchissant (3) muni d'une structure de Fresnel et est réfléchie pour l'éclairage d'une surface (4) et
    sur l'élément réfléchissant (3), dans une zone autour de l'axe optique de la source de lumière (1) se trouve une structure de Fresnel à facettes avec des flancs perturbateurs et des flancs actifs et des angles de flancs, divergents les uns des autres, de surfaces actives de la structure de Fresnel,
    caractérisé en ce que
    avec la structure de Fresnel à facettes, une partie de la lumière réfléchie est dirigée vers le bord extérieur de la surface à éclairer (4) ;
    la structure de Fresnel à facettes étant conçue de façon à ce que la lumière provenant des surfaces actives soit réfléchie à proximité de la surface à éclairer sur le bord extérieur de la surface à éclairer (4) plus loin que par les surfaces actives à une distance supérieure de l'axe optique
    et/ou l'angle de flanc des surfaces actives de la structure de Fresnel à facettes est alternativement supérieur et inférieur et, avec des angles de flancs supérieurs, la lumière est dirigée vers le bord extérieur de la surface à éclairer.
  2. Elément d'éclairage selon la revendication 1, caractérisé en ce qu'une grande partie de la lumière réfléchie est dirigée vers le bord extérieur de la surface à éclairer (4).
  3. Elément d'éclairage selon l'une des revendications précédentes, caractérisé en ce qu'au moins une zone non structurée, qui est exempte de structures de Fresnel, est présente.
  4. Elément d'éclairage selon l'une des revendications précédentes, caractérisé en ce qu'une zone non structurée de l'élément réfléchissant (3) comprend une surface plane, incurvée de manière convexe ou concave.
  5. Elément d'éclairage selon l'une des revendications précédentes, caractérisé en ce que la lumière collimatée est dirigée vers l'élément réfléchissant (3).
  6. Elément d'éclairage selon l'une des revendications précédentes, caractérisé en ce que la structure de Fresnel est prévue sur la surface de l'élément réfléchissant (3) opposée à la source de lumière (1) et la surface de la structure de Fresnel est munie d'un revêtement réfléchissant.
  7. Elément d'éclairage selon l'une des revendications précédentes, caractérisé en ce que les angle des flancs actifs avec lesquels la lumière est dirigée vers le bord extérieur de la surface à éclairer, par rapport à l'axe optique, sont supérieurs aux angles des flancs avec lesquels la lumière est dirigée vers une zone centrale de la surface à éclairer (4).
EP08700855.3A 2007-01-10 2008-01-09 Élément d'éclairage avec structure de fresnel réfléchissante Active EP2108089B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007002438A DE102007002438A1 (de) 2007-01-10 2007-01-10 Beleuchtungselement mit reflektierender Fresnelstruktur
PCT/DE2008/000039 WO2008083677A1 (fr) 2007-01-10 2008-01-09 Élément d'éclairage avec structure de fresnel réfléchissante

Publications (2)

Publication Number Publication Date
EP2108089A1 EP2108089A1 (fr) 2009-10-14
EP2108089B1 true EP2108089B1 (fr) 2016-03-23

Family

ID=39265150

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08700855.3A Active EP2108089B1 (fr) 2007-01-10 2008-01-09 Élément d'éclairage avec structure de fresnel réfléchissante

Country Status (3)

Country Link
EP (1) EP2108089B1 (fr)
DE (1) DE102007002438A1 (fr)
WO (1) WO2008083677A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012012012U1 (de) * 2012-12-13 2013-04-15 Yasin Altunok Deckenreflektor (Reflektor für die Raumdecke)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4081667A (en) 1976-07-28 1978-03-28 Optical Coating Laboratory, Inc. Lighting fixture having fresnel reflector with high reflection coating thereon
DE3728191C1 (de) * 1987-08-24 1989-02-23 Medium Vertriebsgesellschaft F Durchlicht-Schreibprojektor
US4989125A (en) * 1988-05-10 1991-01-29 Minnesota Mining And Manufacturing Company Reflector using fresnel-type structures having a plurality of active faces
GB9323663D0 (en) * 1993-11-17 1994-01-05 Menvier Electronic Eng Ltd Luminates
KR20010052208A (ko) * 1999-01-14 2001-06-25 스프레이그 로버트 월터 광확산용 광학 시트
EP1266255B1 (fr) * 2000-03-16 2008-11-12 Lee Products, Inc. Procédé de conception et de fabrication d'un dispositif optique non imageur à haute efficacité
DE102004004261B3 (de) * 2004-01-21 2005-09-01 Fresnel Optics Gmbh Anordnung zur gleichmäßigen oder vorgebbaren Beleuchtung von großen Flächen

Also Published As

Publication number Publication date
DE102007002438A1 (de) 2008-07-17
EP2108089A1 (fr) 2009-10-14
WO2008083677A1 (fr) 2008-07-17

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