EP1099078B1 - Optisches element zur umlenkung von lichtstrahlen und herstellungsverfahren - Google Patents

Optisches element zur umlenkung von lichtstrahlen und herstellungsverfahren Download PDF

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Publication number
EP1099078B1
EP1099078B1 EP00925225A EP00925225A EP1099078B1 EP 1099078 B1 EP1099078 B1 EP 1099078B1 EP 00925225 A EP00925225 A EP 00925225A EP 00925225 A EP00925225 A EP 00925225A EP 1099078 B1 EP1099078 B1 EP 1099078B1
Authority
EP
European Patent Office
Prior art keywords
reflective layer
reflective
optical element
core
transparent
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.)
Expired - Lifetime
Application number
EP00925225A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1099078A1 (de
Inventor
Günther SEJKORA
Siegfried Bickel
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.)
ZUMTOBEL LIGHTING GmbH
Original Assignee
Zumtobel Lighting GmbH Austria
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 Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Publication of EP1099078A1 publication Critical patent/EP1099078A1/de
Application granted granted Critical
Publication of EP1099078B1 publication Critical patent/EP1099078B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • 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
    • F21V5/02—Refractors for light sources of prismatic shape
    • 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
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • 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

Definitions

  • the present invention relates to an optical element for deflecting entering and then exiting therefrom light rays such that their exit angle is limited, for example for use as a lamp cover, according to the preamble of claim 1 and a reflective element as part of the optical element
  • the preamble of claim 9, and corresponding method for producing the optical and the reflective element are provided.
  • optical elements of the type mentioned is to be achieved that the exit angle of light beams is limited for example from a lamp to reduce glare to the viewer.
  • such an element of course also causes mechanical protection of the lamp and in particular the light source inside the lamp.
  • FIG. 1 shows an optical element known from AT-B-403,403.
  • the entire element is made entirely of a crystal-clear or transparent material.
  • FIGS. 16-24 and the associated description of this document for example, the possibilities are disclosed of filling the grooves between the microprisms with a filling compound having reflective properties, the side walls of the microprisms coated with a reflective material to cover the microprism structure with a reflective mask or a grid or provide combinations of these measures. Since the dimensions of the microprisms are only in the range of a few hundred microns, a high precision is required in the production of such optical elements or lighting covers.
  • an object of the present invention to provide an optical element of the type mentioned with a reflective layer, which is simple in construction and thus also in its production and at the same time has a stable structure and a high photometric quality ,
  • a further object of the present invention is to provide a reflective element for such an optical element, which is simple in construction and thus also in its production and at the same time ensures a stable construction and a high lighting quality of the entire optical element.
  • the optical element consists of a plate-shaped core of transparent material, which is occupied on one side with microprisms, which tapers to form furrows - starting from its root, wherein, for example, the entirety of the microprism cover surfaces, the light entrance surface and the other side of the Kerns forms the light exit surface, and wherein the grooves are covered with an at least one side reflective layer.
  • a film of transparent material arranged on the side of the reflective layer facing away from the element core is furthermore provided.
  • the film gives the reflective layer an independent stability, which on the one hand facilitates their handling in the production of the entire optical element and on the other hand also increases the stability of the element as a whole.
  • the mounting of such a reflective element on the element core of the optical element is easier to accomplish with the required high accuracy than the direct application, for example, of a thin metal foil to the intermediate regions of the microprism structure, as required in the prior art systems.
  • the reflective layer is preferably firmly connected to the transparent film, in particular welded or glued.
  • the welding in this case has the particular advantage that no further material component is present in the system, the refractive index of which should be taken into account with respect to the photometric properties of the optical element.
  • reflective layer is preferably also firmly connected to the element core, in particular glued or welded.
  • the connection of the reflective layer can take place both following a prefabrication of the reflective element from the reflective layer and the transparent film as well as in a common process step with the connection of the reflective layer with the transparent film.
  • optical element according to the present invention described below is particularly suitable as a cover for luminaires whose light exit angle is to be limited to avoid obstruction for a viewer.
  • Fig. 1 shows a known luminaire cover or a known optical element in a perspective view, as it or it is also used as part of the present invention.
  • the known luminaire cover has on its side facing the lamp or the lamps (not shown) of the lamp side arranged in rows and rows pyramidal profiles 2, so-called microprisms, which are formed as truncated pyramids on a base.
  • the entire luminaire cover consists entirely of a clear or transparent material, such as acrylic glass.
  • the known luminaire cover illustrated in FIG. 1 simultaneously forms an embodiment of an element core 1 for an optical element 9 according to the invention, as will be described in more detail below.
  • the plate-shaped, transparent core 1 of the luminaire cover is occupied on one side with microprisms 2, which taper to form grooves 7 - starting from its root 5 - wherein the entirety of the microprism cover surfaces 4, the light entrance surface and the other side of the core. 1 the light exit surface 3 forms.
  • the exit angle of the light rays emerging from the optical element shown in FIG. 1 downwards should be at most about 60-70 ° relative to the perpendicular of the exit surface 3 in order to avoid or at least minimize glare to the observer.
  • the core 1 is used so that the totality of the micro-prism cover surfaces 4, the light exit surface and the other side of the core forms the light entrance surface.
  • the intermediate regions or furrows between the individual microprisms have in the present case a mutual distance of about 700 microns and have in the plane of the light entry surfaces 4 has a width of about 150 microns.
  • the light is reflected back in the direction of the lamp, which is generally provided with arranged behind reflectors, so that substantially all of the light emitted by the lamp of the light light leaves the optical element through the light entrance and light exit surfaces 4, 3 and a high lighting efficiency is guaranteed.
  • the covering material for the grooves 7 metals having high reflectivity such as silver, aluminum or gold or the like are therefore particularly suitable.
  • the embodiment of the optical element 9 according to the invention now differs from the known luminaire cover according to FIG. 1 in that a reflective element 10 is applied on the side of the element core 1 having the microprisms 2, as shown schematically in section in FIGS or In perspective view is shown.
  • a reflective element 10 is applied on the side of the element core 1 having the microprisms 2, as shown schematically in section in FIGS or In perspective view is shown.
  • FIGS. 2 and 3 For a better illustration of the structure according to the invention of the optical element 9, these are shown separately in FIGS. 2 and 3. In the practical embodiment, these components are of course directly in contact or connected to each other.
  • the element core 1 has, for example, the arrangement shown in FIG.
  • the invention is not limited to this arrangement of the microprisms in rows and rows (cross structure) and on the square base surface microprisms.
  • the microprisms 2 can also have an elongated base surface and can be arranged next to one another only in rows (longitudinal structure). It is also conceivable to combine two transparent element cores 1 with a longitudinal structure and to arrange them on top of one another, whereby one longitudinal structure is rotated by 90 ° with respect to the other longitudinal structure in the plane of the light exit surface 3, so that overall a similar effect as in the cross structure is achieved.
  • any basic shapes of the microprisms 2 are possible, which should, however, be formed as possible in the form of a uniform polygon or a circle in order not to unnecessarily complicate the shape of the reflective layer 12 described below.
  • the element core 1 of the optical element 9 according to the invention can be produced in various ways from a transparent material, preferably a transparent plastic material, such as acrylic glass.
  • a transparent material preferably a transparent plastic material, such as acrylic glass.
  • injection-embossing process This method is similar to the well-known plastic injection, but takes place with a relatively low injection pressure. After injecting the transparent material into the mold, a mechanical pressure is exerted on the still liquid material so that it can penetrate into the structures of the mold.
  • the production of the element core 1 is also possible by means of a hot stamping process, in which the transparent material is poured in liquid form into a corresponding mold and then also subjected to pressure to achieve the embossing.
  • a transparent plastic block with the furrows can be mechanically provide. This can be done for example by cutting, for example with a diamond cutter, or by means of a laser beam.
  • Another possibility for producing the transparent core 1 is to press the liquid plastic through an extrusion head. In this case, however, only linear structures of microprisms 2 can be generated.
  • the reflecting element 10 On the side of the element core 1 facing the lamp of the luminaire, i. on the level of the micro-prism cover surfaces 4 forming the light entry surface, a reflective element 10 is applied.
  • the reflecting element 10 consists essentially of a foil or a thin plate 11 of a transparent material and a layer 12 of a reflective material.
  • the film 11 preferably the same material as for the element core 1 is used.
  • the transparent element 11 both a plate as shown in Fig. 2 and a film as shown in Fig. 3 may be used.
  • the reflective layer 12 in particular the above-mentioned metals with reflective properties or materials with a similarly high reflectivity come into consideration.
  • the transparent film 11 and the reflective layer 12 are two separate components, which are firmly connected to each other prior to their connection to the element core 1.
  • the metal layer 12 with grid or line structure is this example, galvanically produced or stamped from metal foils.
  • the compound of the layer 12 with the film 11 is preferably carried out by means of gluing or welding. At present, welding of the two components together is preferred, since in this case no further material in the form of a transparent adhesive is contained in the reflective element 10, whose refractive index must be taken into account in the optical properties of the optical element 9.
  • a transparent adhesive such as an adhesive, an adhesive film or a hot melt adhesive is used.
  • the reflective layer 12 is advantageously heated and then pressurized to the compound. The heating of the reflective layer 12 takes place here, for example, by applying an alternating magnetic field to the metal grid 12. The alternating magnetic field induces eddy currents in the metal grid 12, which heat the metal.
  • the reflective layer 12 may be welded to the transparent film 11 also by laser welding. The welding is preferably carried out locally at the edges of the metal grid 12th
  • the film 11 and the layer 12 are produced as a unit.
  • a reflective metal layer is first applied to the transparent film 11, preferably vapor-deposited.
  • the desired lattice or line structure is introduced into this metal layer 12. This is preferably done by free cutting by means of a laser beam or by mechanical cutting free.
  • the desired structure can also be worked out of the metal layer 12 by means of an etching process.
  • the reflective element 10 is much more stable in comparison to a single grid 12 or a single grid foil and can therefore be handled more easily. This also facilitates the further production of the optical element 9. In addition, the stability of the reflective element 10 also increases the stability of the optical element 9 as a whole.
  • the element 10 of the invention further ensures a precise application of the reflective layer 12 on the element core 1 or the grooves 7 and by the support of the film or plate 11 a constant alignment of the element 10 with respect to the micro-prisms 2 and their grooves. 7
  • connection of the reflective element 10 or the reflective layer 12 with the transparent core 1 preferably also takes place by gluing or welding. In principle, the methods already mentioned above for the connection of the reflective element 10 are possible.
  • the two-part reflective element 10 instead of the prefabrication of the element 10, it is also possible to superimpose the three individual elements element core 1, metal mesh 12 and transparent film 11 one on top of the other and to align them together in a single process step.
  • the same methods are used, which have already been mentioned above in the separate connecting steps metal mesh foil and element core-reflecting element, i. in particular welding and gluing.
EP00925225A 1999-05-20 2000-04-19 Optisches element zur umlenkung von lichtstrahlen und herstellungsverfahren Expired - Lifetime EP1099078B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19923225 1999-05-20
DE19923225A DE19923225B4 (de) 1999-05-20 1999-05-20 Optisches Element zur Umlenkung von Lichtstrahlen und Herstellungsverfahren
PCT/EP2000/003570 WO2000071929A1 (de) 1999-05-20 2000-04-19 Optisches element zur umlenkung von lichtstrahlen und herstellungsverfahren

Publications (2)

Publication Number Publication Date
EP1099078A1 EP1099078A1 (de) 2001-05-16
EP1099078B1 true EP1099078B1 (de) 2007-04-11

Family

ID=7908676

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00925225A Expired - Lifetime EP1099078B1 (de) 1999-05-20 2000-04-19 Optisches element zur umlenkung von lichtstrahlen und herstellungsverfahren

Country Status (11)

Country Link
US (1) US6523980B2 (no)
EP (1) EP1099078B1 (no)
JP (1) JP2003500684A (no)
AT (2) ATE359481T1 (no)
AU (1) AU764677B2 (no)
CA (1) CA2338096C (no)
DE (5) DE19923225B4 (no)
ES (1) ES2284492T3 (no)
NO (1) NO20010311L (no)
NZ (1) NZ509307A (no)
WO (1) WO2000071929A1 (no)

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PT1179158E (pt) * 1999-05-20 2003-09-30 Zumtobel Staff Gmbh Luminaria
DE10153380A1 (de) * 2000-11-29 2002-06-13 Zumtobel Staff Gmbh Leuchte mit einer lichtdurchlässigen Scheibe
DE10124370B4 (de) 2001-05-18 2010-11-18 Zumtobel Lighting Gmbh Optisches Element mit Totalreflexion
US7222994B2 (en) * 2002-09-12 2007-05-29 Koninklijke Philips Electronics, N.V. Illumination system
TWI271585B (en) * 2004-12-16 2007-01-21 Univ Nat Chiao Tung Bottom lighting backlight module having uniform illumination and process for manufacturing the same
ATE412851T1 (de) 2005-06-13 2008-11-15 Hartmut S Engel Innenraumleuchte
DE102005035720A1 (de) 2005-07-29 2007-02-08 Zumtobel Staff Gmbh Leuchte mit einer langgestreckten Lichtquelle und mit einem ebenfalls langgestreckten Lichtleitelement
US8601757B2 (en) * 2010-05-27 2013-12-10 Solatube International, Inc. Thermally insulating fenestration devices and methods
US9279919B2 (en) * 2012-03-28 2016-03-08 Sharp Kabushiki Kaisha Light diffusing member comprising hollow portions and a plurality of light-shielding layers dotted on one surface of a base material, method for manufacturing the same and display device
JP2013254145A (ja) * 2012-06-08 2013-12-19 Nitto Denko Corp マイクロミラーアレイの製法
JP2014032394A (ja) 2012-07-13 2014-02-20 Nitto Denko Corp マイクロミラーアレイおよびその製法並びにそれに用いる光学素子
DE102013100888A1 (de) * 2013-01-29 2014-07-31 Schott Ag Licht-Konzentrator oder -Verteiler
DE102017104432A1 (de) * 2017-03-03 2018-09-06 Hella Kgaa Hueck & Co. Verfahren zur Anordnung einer Funktionsschicht an ein Kunststoffbauteil und ein Verbund hieraus
TWI732513B (zh) * 2019-08-16 2021-07-01 神盾股份有限公司 指紋感測裝置
CN113031139B (zh) * 2019-12-25 2022-07-05 南开大学 一种3d打印的透射式大角度偏折双层均匀光栅

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Also Published As

Publication number Publication date
US20010002878A1 (en) 2001-06-07
EP1099078A1 (de) 2001-05-16
ATE440247T1 (de) 2009-09-15
AU4401600A (en) 2000-12-12
JP2003500684A (ja) 2003-01-07
ATE359481T1 (de) 2007-05-15
DE50002848D1 (de) 2003-08-14
DE19923225A1 (de) 2000-11-23
DE29909282U1 (de) 2000-10-05
US6523980B2 (en) 2003-02-25
DE19923225B4 (de) 2009-10-22
NZ509307A (en) 2003-10-31
ES2284492T3 (es) 2007-11-16
CA2338096A1 (en) 2000-11-30
NO20010311D0 (no) 2001-01-19
WO2000071929A1 (de) 2000-11-30
NO20010311L (no) 2001-01-19
CA2338096C (en) 2009-01-20
DE50015723D1 (de) 2009-10-01
AU764677B2 (en) 2003-08-28
DE50014233D1 (de) 2007-05-24

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