WO2013010582A1 - Élément optique de mélange de couleurs et système optique de mélange de couleurs - Google Patents

Élément optique de mélange de couleurs et système optique de mélange de couleurs Download PDF

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Publication number
WO2013010582A1
WO2013010582A1 PCT/EP2011/062318 EP2011062318W WO2013010582A1 WO 2013010582 A1 WO2013010582 A1 WO 2013010582A1 EP 2011062318 W EP2011062318 W EP 2011062318W WO 2013010582 A1 WO2013010582 A1 WO 2013010582A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical element
light
sloa
regions
optical
Prior art date
Application number
PCT/EP2011/062318
Other languages
German (de)
English (en)
Inventor
Stefan Hadrath
Julius Muschaweck
Original Assignee
Osram Ag
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 Osram Ag filed Critical Osram Ag
Priority to PCT/EP2011/062318 priority Critical patent/WO2013010582A1/fr
Publication of WO2013010582A1 publication Critical patent/WO2013010582A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G02B19/0066—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED in the form of an LED array
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0284—Diffusing elements; Afocal elements characterized by the use used in reflection
    • 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
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to an optical element for color mixing of different colored light sources, in particular of light-emitting diodes, and an arrangement, in particular a lamp, with such an optical element for color mixing.
  • lamps that contain a variety of bulbs used.
  • LEDs can be used.
  • a plurality of light emitting diodes are arranged in a small space next to one another in a housing of the lamp.
  • a far-field of a lamp attached ⁇ child object or be exploiting Dende in the far field area is illuminated with an almost homogeneous light color, has especially in lamps, comprising a plurality of light emitting diodes are taken to ensure that all light-emitting diodes, in particular those of the same type For example, white, warm white or cold white, are selected from the same brightness and color group.
  • a high logistical effort is required, which is associated with increasing costs.
  • a further possibility to, in a lamp comprising a plurality of white LEDs to achieve a homogeneous color impression in the far field is the white light emit ⁇ animal light emitting diodes some monochromatic light emitting diodes, preferably red, blue and / or green light emitting diodes to mix to to increase the color rendering index.
  • an observer recognizes the differently colored bulbs when viewing the lamp in the near field.
  • an optical element for color mixing in the near field of a lamp comprising differently colored light sources, a homogeneous color impression can be aimed with it ⁇ . Furthermore, an optical arrangement is to be specified for color mixing, wherein a viewer sees when viewing the arrangement itself in color and luminance almost homogeneous, radiating source.
  • An optical element for color mixing comprises a first side surface having first regions and second regions, the first regions of the first side surface being configured to allow light to enter the interior of the optical element, and the second regions of the first side surface to be a diffuse reflection of light, formed from the interior of the optical element impinges on the second regions are formed.
  • the optical element comprises a second, the first side surface opposing side surface, which is adapted to that light depending on an angle at which the light from inside the optical Ele ⁇ ments incident on the second side face is reflected back into the interior of the optical element or from the interior of the optical element emerges.
  • the optical element may be used as a cylinder-shaped flat body, in particular as a cylindrical disk, be oriented forms ⁇ comprising a plane-parallel first and second sides ⁇ surface.
  • the first regions of the first side surface may each have depressions in the form of a conical section.
  • the second sides ⁇ surface is polished at their surface such that a large ⁇ part of the light from the smooth top surface of the second Be ⁇ ten Structure reflected in the interior of the optical element totalreflek ⁇ advantage and then to the second areas of the first side surface again diffusely becomes.
  • An optical arrangement for example a lamp, for the color mixture, comprises an optical element of the above disclosed embodiment and a carrier element on which light sources are arranged.
  • the optical element is aligned with the carrier element in such a way that the light sources are respectively arranged above the depressions of the optical element.
  • the lamp thus has a plurality of light sources, which is preceded by an op ⁇ table element, which is designed as a mixing optics.
  • the optical element may, for example, contain polycarbonate, which mixes the light of the light sources and emits lambertsch into a half-space. The light is mixed well not only in the far field, but also in the near field of the lamp, so that the entire lamp for a viewer appears as a uniformly luminous object. If the lamp has a plurality of light-emitting diodes as a light source, a viewer who looks into the lamp does not see light dots of different colors, but a source which is homogeneous in color and luminance and radiating lambertian.
  • optical element for color mixing and the arrangement for color mixing can be found in the subclaims.
  • FIG. 1 shows an embodiment of an optical element for color mixing in the near field
  • Figure 2 shows an embodiment of an optical element for
  • FIG. 3 shows a perspective view of an embodiment of the optical element with light sources
  • Figure 4 shows an embodiment of an optical arrangement for
  • FIG. 6A shows a detail from the CIE standard color system
  • Figure 6C color temperature, color space coordinates and illuminance plotted against the diameter of a lamp with an upstream optical element for color mixing.
  • FIG. 1 shows an embodiment of an optical element 10 for color mixing.
  • the optical element may for example be designed as a plane-parallel plate and a Materi ⁇ al polycarbonate or polymethyl methacrylate or glass keep ⁇ ent.
  • the optical element has a side surface SlOa, one of the side surface SlOa opposite side surface SlOb and arranged between the side surfaces SlOa and SlOb side surface SlOc on.
  • the side surface SlOa has first regions 11. Between or adjacent to the Be ⁇ rich 11, the side surface SlOa areas 12.
  • the regions 11 are formed to allow light to enter the optical element 10.
  • depressions 20 may be arranged, which extend from the side surface SLOA in the interior of the opti ⁇ rule element 10 in the side surface SLOA.
  • the regions 12 of the side surface SlOa are configured to diffuse light incident on the regions 12 from the interior 13 of the optical element diffusely back into the interior of the optical element. Furthermore, the regions 12 are configured to prevent leakage of the light incident on the regions 12 from the interior 13 of the optical element 10.
  • the regions 12 of the side surface SLOA example, diffuse, highly reflective out ⁇ be formed. For this purpose, for example, on the areas 12 of the side surface SlOa a diffuse, highly reflective
  • the layer can be arranged.
  • the layer may have a reflection ⁇ degree of more than 90%.
  • a material containing titanium di oxide ⁇ be disposed on the regions 12 of the side surface SLOA .
  • white color can be applied on the areas 12 of the Be ⁇ th Structure SlOa.
  • the regions 11 of the side surface SLOA and the remaining pages ⁇ surfaces slob and sloc are formed such that when at meetings ⁇ of light rays from the interior 13 of the optical element on the side surfaces slob and sloc under a be ⁇ voted angle, the light totally in the Inside of the optical Elements reflected back.
  • the surface of the side surface SlOa at the regions 11 of the recesses 20 and the surfaces of the side surfaces SlOb and SlOc may be polished.
  • FIG. 2 shows a beam path of light which is coupled into the optical element 10 at the regions 11 of the side surface SLOa.
  • the optical element 10 recesses 20.
  • light sources 50a and 50b are arranged above the regions 11.
  • the light ⁇ sources 50a and 50b emit light lambertian in the recesses 20 of the optical element 10th
  • a light beam generated by the light source 50a and a light beam emitted by the light source 50b are shown in FIG. 2, respectively.
  • the light rays are ⁇ at an interface between the recess 20 and the material of the optical element 10 such Gebro ⁇ Chen, that the light beams are radiated into the interior 13 of the optical element.
  • a part of the light beams for example the beams shown in FIG. 2, are refracted at the interface between the recesses 20 and the optical element 10 in particular such that the light beams strike the side surface SlOb at an angle at which a total reflection at the side surface SlOb ⁇ xion occurs.
  • the light rays are reflected back into the interior 13 of the optical element 10.
  • the diffusely high reflectors ⁇ animal forming portions 12 of the side surface SLOA on.
  • Be ⁇ rich 12 of the side surface SlOa then occurs a dif ⁇ fuse reflection of the totally reflected light rays.
  • the light sources 50a and 50b emit light of different color
  • the light is mixed in the interior of the optical element 10 due to the total reflection on the side surface SlOb and the diffuse reflection on the side surface SlOa such that an observer illuminates when viewing the area 11 optical element receives a homogeneous color impression.
  • the optical element 10 appears as a homogeneous in color and luminance, lambertsch radiating light source.
  • the recesses 20 are formed such that the light coupled into the interior 13 of the optical element at the interface between one of the recesses 20 and the material of the optical element 10 is refracted at an angle at which it strikes the side surface SlOb total reflection occurs.
  • the recesses 20 may be formed, for example, as conical incisions in the body of the optical element 10.
  • the recesses 20 of the conical incisions can protrude from the side surface SlOa at least to half the thickness of the optical element 10 into the material of the optical element.
  • the cone-shaped cut-outs 20 of the side surface can be obtained starting SLOA extend into the material of the optical element 10 to Be ⁇ ten Activities slob or approximately up to the side surface slob.
  • a cone-shaped notch 20 of the cone-shaped ⁇ incision on the side surface SLOA may have a radius ⁇ , so that a lamp can be placed exactly over the recess of the conical notch.
  • the conical incision may, for example, have a radius between 1.5 mm and 3 mm, in particular a radius of 1.7 mm.
  • FIG. 3 shows a perspective view of the optical element 10 shown in cross-section in FIG.
  • Light sources 50a, 50b and a light source 50c which can be regularly arranged on egg ⁇ ner surface of a board NEN ⁇ nen.
  • the optical element 10 is formed as a cylindrically shaped body with mutually plane-parallel side surfaces SlOa and SlOb.
  • the optical element may comprise a material made of polycarbonate or polymethyl methacrylate, or glass contained ⁇ th.
  • the optical element has a cylindrical shape with a round basic ⁇ or side surface SLOA and round top or side surface on slob.
  • the cylindrical body of the optical element may have a height or a thickness of between 3 mm to 10 mm, preferably of 5.5 mm, and a radius of between 5 mm to 20 mm, preferably of 10.5 mm.
  • the side surfaces SlOb and SlOc can be polished. Likewise, the side surface SlOa may be polished at the regions 11.
  • the base can at the areas 12 with a dif ⁇ fus, highly reflective layer, such as white paint or a material containing the titanium dioxide be beschich ⁇ tet.
  • the light sources 50a, 50b and 50c can be designed as light-emitting diodes. However, any other light source can be used. It should be noted that the embodiment of the optical element is not limited to the use of three light sources, as shown in FIG. Only two or more than three light sources can be used. It is in the optical element 10 in front of each light source to provide a recess 20 in the material of the optical element 10.
  • the light emitting diode 51 is formed as a conversion LED.
  • the other light sources can be constructed 52 and 53 as light-emitting diodes with a color, so that the 52 and 53 emitted by mixture of the light emitting diodes 51, Light inside the optical element results in a color rendering index Ra of more than 90.
  • the above-mentioned color rendering index Ra between 70 and 80 alsspielswei ⁇ se when using a red light-emitting light emitting diode 52 and a blue light emitting light emitting diode 53 by Mixture of the light emitted by the LEDs within the optical element of the color rendering index Ra can be increased to over 90.
  • FIG. 4 shows an optical arrangement 1 for color mixing, for example a lamp comprising an optical element 10 according to one of the above-mentioned embodiments.
  • the optical element 10 thus has, at regions on 11-well 20, which are formed for example as a cone-shaped incision in the mate rial of the optical element ⁇ 10th
  • the optical element is diffused, formed highly reflective, for example by arranged a diffuse, highly reflective layer having a Reflection ⁇ onstex of more than 90% on the surface of 39flä ⁇ che SLOA at the portions 12 is.
  • the soflä ⁇ chen slob and sloc are formed such that Shafts of Light ⁇ len incident from the interior 13 of the optical element on one of the side surfaces slob or sloc, are reflected as a function of the angle of incidence totally inside the op ⁇ tables element 10 back , Likewise, the side surface SlOa is formed on the regions 11 such that light rays which impinge on the regions 11 of the side surfaces SlOa from the interior 13 of the optical element are totally reflected back into the interior of the optical element 10 as a function of the angle of incidence.
  • light sources 50a, 50b which may be formed, for example, as LEDs, ange ⁇ assigns.
  • the light emitting diodes are on a support member 40, the pitch maintained at ⁇ a circuit board.
  • the light sources are fixed to the carrier element 40 such that they are arranged over the regions 11 of the side surface SlOa or over the depressions 20.
  • a Halteele ⁇ ment 60 is provided which is fixed to the support member 40.
  • Can on the holding member 60 fixing elements 90, at ⁇ game as clamps, through which the optical element is held on the holding member 60 10 may be disposed.
  • the optical element 10 is held on the holding element 60 such that a narrow gap 70, for example an air gap, is formed between the holding element 60 and the side surface SlOc of the optical element.
  • the air gap between the holding element 60 and the optical element 10 is provided so that upon the impingement of light from the interior 13 of the optical element at a certain angle to the side surface SlOc a total reflection occurs.
  • the surface 61 of the holding element 60 can for this purpose, for example, a layer containing titanium dioxide, aufwei ⁇ sen.
  • a white color may be applied to the surface 61.
  • the highly reflective layer 80 may comprise egg ⁇ NEN reflection coefficient of more than 90%.
  • the side surface SLOC instead of polished diffusely re ⁇ be inflected.
  • the side surface SLOC instead of polished diffusely re ⁇ be inflected.
  • Figure 5 shows a perspective view of the optical An ⁇ order or the lamp 1.
  • the retaining element is arranged 60th
  • the holding element 60 can be designed as an annular element.
  • the holding ⁇ element may be formed, for example, of a plastic, wherein on the inner circumferential surface 61, the diffuse, highly re ⁇ inflecting layer 80 is arranged.
  • the optical element 10 is fixed to the holding element 60.
  • a lamp shown in FIGS. 4 and 5 can have, for example, an optical element 10 with a height or thickness of 5.5 mm and a radius of 10.5 mm.
  • the recesses 20 may have a depth of approximately 5.5 mm, so that the recesses, starting almost to the side surface Slob réellere ⁇ ting the side surface SLOA.
  • the recesses may be conically shaped with a radius at the base of 1.7 mm.
  • the material for the optical element polycarbonate can be used.
  • As light sources three white LEDs can be used, which are arranged radially in a radius of 10 mm.
  • Figure 6B shows the color space coordinates, and the lighting strength ⁇ the light emitting diodes of the above-mentioned optical element is applied to the diameter of the optical arrangement with a radius of 10.5 mm without the optical element for color mixing.
  • Figure 6C shows the color temperature, the color space coordinates and the luminance of the Leuchtdio ⁇ the above optical arrangement, which have been recorded just behind the optical arrangement applied over the diameter of the optical arrangement with a radius of 10.5 mm, wherein the lamp the above-mentioned optical element 10 is connected upstream for color mixing in the near field.
  • the mixing optics mix colors with an optical efficiency of 60%.
  • the standard deviation for the color coordinates CIE x / y is 0.0043 or 0.0065 and is therefore less than 2%.
  • the optical component 10 for color mixing or an optical arrangement in particular a lamp comprising the optical component 10 for color mixing, a homogenization of the luminance distribution in the near field of the lamp or the optical element can thus be achieved, the lamp only a small overall height on ⁇ points.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

L'invention concerne un élément optique de mélange de couleurs comprenant une première surface latérale (S10a) comportant des premières zones (11) qui sont réalisées pour l'entrée de la lumière à l'intérieur (13) de l'élément optique (10) et des deuxièmes zones (12) qui sont réalisées pour la réflexion diffuse de la lumière provenant de l'intérieur (13) de l'élément optique et atteignant les deuxièmes zones (12). Une deuxième surface latérale (S10b) opposée à la première surface latérale est réalisée pour réfléchir en totalité la lumière incidente provenant de l'intérieur de l'élément optique vers l'intérieur (13) de l'élément optique (10) sur les deuxièmes zones (12) de la première surface latérale. En raison de la réflexion diffuse sur les deuxièmes zones (12) de la première surface latérale (S10a), la lumière est mélangée de telle manière que l'élément optique apparaît à un observateur sous la forme d'une source lambertienne homogène en termes de couleur et de luminance.
PCT/EP2011/062318 2011-07-19 2011-07-19 Élément optique de mélange de couleurs et système optique de mélange de couleurs WO2013010582A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/062318 WO2013010582A1 (fr) 2011-07-19 2011-07-19 Élément optique de mélange de couleurs et système optique de mélange de couleurs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/062318 WO2013010582A1 (fr) 2011-07-19 2011-07-19 Élément optique de mélange de couleurs et système optique de mélange de couleurs

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WO2013010582A1 true WO2013010582A1 (fr) 2013-01-24

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10194503B2 (en) 2014-04-02 2019-01-29 Abl Ip Holding Llc Composite light source systems and methods
US10776791B2 (en) 2007-03-16 2020-09-15 Visa International Service Association System and method for identity protection using mobile device signaling network derived location pattern recognition
US11405781B2 (en) 2007-03-16 2022-08-02 Visa International Service Association System and method for mobile identity protection for online user authentication

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001007828A1 (fr) * 1999-07-21 2001-02-01 Teledyne Lighting And Display Products, Inc. Appareil d'eclairage
JP4399678B1 (ja) * 2009-02-12 2010-01-20 鈴木 優一 照明装置および表示装置
DE102009017495A1 (de) * 2009-02-11 2010-08-12 Osram Opto Semiconductors Gmbh Beleuchtungseinrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001007828A1 (fr) * 1999-07-21 2001-02-01 Teledyne Lighting And Display Products, Inc. Appareil d'eclairage
DE102009017495A1 (de) * 2009-02-11 2010-08-12 Osram Opto Semiconductors Gmbh Beleuchtungseinrichtung
JP4399678B1 (ja) * 2009-02-12 2010-01-20 鈴木 優一 照明装置および表示装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10776791B2 (en) 2007-03-16 2020-09-15 Visa International Service Association System and method for identity protection using mobile device signaling network derived location pattern recognition
US11405781B2 (en) 2007-03-16 2022-08-02 Visa International Service Association System and method for mobile identity protection for online user authentication
US10194503B2 (en) 2014-04-02 2019-01-29 Abl Ip Holding Llc Composite light source systems and methods

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