WO1999056058A1 - Vorrichtung zur lichtführung für eine langgestreckte lichtquelle - Google Patents
Vorrichtung zur lichtführung für eine langgestreckte lichtquelle Download PDFInfo
- Publication number
- WO1999056058A1 WO1999056058A1 PCT/AT1999/000107 AT9900107W WO9956058A1 WO 1999056058 A1 WO1999056058 A1 WO 1999056058A1 AT 9900107 W AT9900107 W AT 9900107W WO 9956058 A1 WO9956058 A1 WO 9956058A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light source
- grooves
- light
- reflector
- tubular
- Prior art date
Links
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
- 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
- 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
Definitions
- the present invention relates to a device for guiding light for an elongated light source, in particular a fluorescent tube.
- elongated light sources such as fluorescent tubes
- Refracting or reflecting devices can be used for this; a known type of reflective devices are mirror grids made of longitudinal and transverse reflector lamellae. Combinations of refracting and reflecting devices are also possible.
- the present invention is particularly concerned with a light guiding device of the refracting type which can be used alone or in connection with reflecting elements.
- the aim of the invention is to create a refractive light guiding device which enables a simplified construction of luminaires, in particular an inexpensive alternative to louvre mirrors.
- this structure causes light rays near the axial direction to be deflected in a direction closer to the radial direction.
- the light radiation from a fluorescent tube enveloped by such a device (at least partially) is blocked out in an angular cone around the axial, ie the radiation angle normal to the fluorescent tube axis (for example downward) is restricted.
- the grooves are preferably distributed uniformly over the inner circumference of the body, and at least 20 grooves are particularly preferably provided. As a result, the light distribution over the radiation area is homogenized.
- the radius of the flanks is preferably 0.5 to 2.0 times the distance between half the depth of the grooves and the axis of the body.
- flanks of the grooves are inclined in an axially normal section at an angle of 40 ° to 46 °, preferably 43 °, with respect to the radial direction.
- the distance between half the depth of the grooves and the axis of the body is preferably 1.4 to 1.7 times the radius of the light source to be recorded, which enables a particularly compact design.
- the refractive index of the transparent material is at least 1.45, which means a larger shading angle, i.e. allows a smaller beam angle.
- Another aspect of the invention consists in the creation of a luminaire with an elongated light source, in particular fluorescent tube, which is covered by a roof-like reflector and is equipped with a light-guiding device according to the invention with a tubular body which encloses the light source. If a light guide device with a tubular sector body is used, this surrounds the light source on its side facing away from the reflector. - 3 -
- FIG. 1 shows a lamp according to the invention in a section normal to the longitudinal axis
- FIG. 2 shows a portion of the light source and the light guiding device of the luminaire from FIG. 1 in a schematic side view
- FIG. 3 shows dimensioning relationships on an exemplary sector piece of the light guiding device in a section similar to FIG. 1, and FIG.
- FIGS. 4 and 5 are schematic radiation conditions from a point of the light source without (FIG. 4) or with (FIG. 5) light guiding device.
- the light source 1 and the body 3 spanning or encompassing a roof is arranged in a trough, inverted U or partially parabolic reflector 4 of a conventional type.
- the length of the lamp shown in section in FIG. 1 in the direction of the axis 2 can be chosen as desired.
- any known form of an "elongated light source” is possible, e.g. Halogen rods, chains of individual light sources such as incandescent lamps, etc.
- the axis 2 of the light source 1 does not necessarily have to be straight, but can also be slightly curved or polygonal, in which cases the body 3 is adapted to the course of the light source 1.
- the body 3 is or the like on its inside with parallel to the axis 2, adjacent grooves 5, notches. Mistake. In the example shown, 12 grooves 5 are evenly distributed over the inner circumference of the body 3.
- the grooves 5 have concave flanks 6, 7, seen in an axially normal section.
- the radius R ⁇ of the flanks 6, 7 is approximately 0.5 to 2.0 times the distance R2 between - 4 -
- the mean angle ( ⁇ + ⁇ 2 ) / 2 of the flanks 6, 7 to the radial 8 is in the range of 40 ° - 46 °, preferably about 43 °.
- body 3 is approximately 1.4 to 1.7 times the radius RL of the light source 1.
- the outer radius R3 of the body 3 is chosen to be as small as possible, i.e. so that there is just enough strength for the body 3.
- the valley bottoms 9 of the grooves 5 therefore extend close to the outer circumference of the body 3.
- the number of grooves 5 can be chosen to be of any size and is limited in practice by manufacturing restrictions.
- the flanks 6, 7 of the grooves 5 can of course also be flat.
- the operation of the device is as follows.
- the light rays emerging from the light source 2 are formed by the prism-like structure of the grooves 5
- Body 3 not only deflected in the axially normal plane (as shown in Fig. 1), but also in each axially parallel
- FIG. 2 Level, an exemplary of which is shown in FIG. 2. As can be seen from this figure, axis 2 is under one
- Body 3 deflected closer to the radial 8, etc. at an angle 5R> ⁇ ⁇ .
- the body 3 shines wider in every direction perpendicular to the axis than the light source 1.
- FIGS. 4 and 5 show a spatial representation of the combination of the refraction effects outlined in FIGS. 1 and 2. All light rays emanating from a point 10 on the light source 2 at a cone shell angle 11 with respect to the axis
- FIG. 4 goes out (Fig. 4), with the interposition of the body 3 (Fig. 5) in the form of a "compressed" cone shell 12, whereby a shading cone 13 is formed about the axis 2.
- the shading cone 13 creates a restriction of the radiation angle of the lamp shown in FIG. 1 normal to the plane of the drawing in FIG. 1, as could otherwise only be achieved by means of axially normal transverse slats within the reflector 4, - 5 -
- the shading has an advantageous effect in the axial direction, since the light rays deflected from the shading area increase the radiation intensity of the light source / body arrangement on the reflector 4, so that it is better utilized.
- a particular advantage arises in connection with reflectors, which do not change the angle of rays to the axis, so the apex angle of the shading cone of the entire luminaire is not less than that of the light guide.
- axially normal planar reflectors which serve as bilateral termination of the reflector 4, or also axially parallel channel-shaped reflectors, in which each point of the reflector has an axially parallel tangential plane, at which the angle of each beam to the axis is only mirrored, but the amount does not change. With such reflectors, the longitudinal suppression of the light guide is not reduced.
- the body 3 does not have to enclose the light source 2 on all sides; for example, a tubular sector-shaped body which the light source 2 e.g. surrounds on its side facing away from the reflector 4 in a partially annular manner, for example 1/4, half or 3/4.
- both the reflector and the body can have coinciding open locations, axially parallel slots or open sectors, etc., which allow unobstructed passage of certain light rays from the light source.
- This variant is useful, for example, for suspended ceiling lights, in which the body and the reflector have a longitudinal slot on the top, through which the ceiling is illuminated directly from below, thereby creating partial indirect lighting of the room.
- the body 3 can be extruded from a transparent plastic. Alternatively, the body 3 can be made from a - 6 -
- the light source 1 may also have other than circular cross-section and must be arranged not coaxially to the body 3 ⁇ .
- tubular body 3 is understood not only as a cylindrical tubular body, but rather as a generally tubular body, for example with an elliptical profile, a rounded-angular profile, etc.
- the body 3 can rest against the light source 1 in a different way than shown, ie the vertices 14 formed between the flanks 6, 7 of adjacent grooves 5 lie against the outer surface of the light source 1.
- the body 3 can be made in one piece with the outer wall of the light source 1, for example as a sleeve for a fluorescent tube.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Eye Examination Apparatus (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Planar Illumination Modules (AREA)
- Endoscopes (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT99917682T ATE235019T1 (de) | 1998-04-29 | 1999-04-29 | Vorrichtung zur lichtführung für eine langgestreckte lichtquelle |
NZ507603A NZ507603A (en) | 1998-04-29 | 1999-04-29 | Light guiding device for a fluorescent light source surmounted by a roof-like reflector |
EP99917682A EP1073862B2 (de) | 1998-04-29 | 1999-04-29 | Vorrichtung zur lichtführung für eine langgestreckte lichtquelle |
DK99917682T DK1073862T4 (da) | 1998-04-29 | 1999-04-29 | Anordning til lysstyring for en langstrakt lyskilde |
US09/673,780 US6400086B1 (en) | 1998-04-29 | 1999-04-29 | Light guiding device for an oblong light source |
DE59904630T DE59904630D1 (de) | 1998-04-29 | 1999-04-29 | Vorrichtung zur lichtführung für eine langgestreckte lichtquelle |
AU35886/99A AU755027B2 (en) | 1998-04-29 | 1999-04-29 | Light guiding device for an oblong light source |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATGM280/98 | 1998-04-29 | ||
AT28098 | 1998-04-29 | ||
EP98890139.3 | 1998-05-12 | ||
EP98890139A EP0953800A1 (de) | 1998-04-29 | 1998-05-12 | Vorrichtung zur Lichtführung für eine langgestreckte Lichtquelle |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999056058A1 true WO1999056058A1 (de) | 1999-11-04 |
Family
ID=3486349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT1999/000107 WO1999056058A1 (de) | 1998-04-29 | 1999-04-29 | Vorrichtung zur lichtführung für eine langgestreckte lichtquelle |
Country Status (8)
Country | Link |
---|---|
US (1) | US6400086B1 (de) |
EP (2) | EP0953800A1 (de) |
AT (1) | ATE235019T1 (de) |
AU (1) | AU755027B2 (de) |
DK (1) | DK1073862T4 (de) |
ES (1) | ES2195562T5 (de) |
NZ (1) | NZ507603A (de) |
WO (1) | WO1999056058A1 (de) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001071246A1 (de) * | 2000-03-20 | 2001-09-27 | Bartenbach, Christian | Vorrichtung zur lichtführung für eine langgestreckte lichtquelle |
US7658514B2 (en) * | 2006-04-13 | 2010-02-09 | Lg Electronics Inc. | Light guide, method and apparatus for manufacturing the same, and illuminating system having the same |
US9625638B2 (en) | 2013-03-15 | 2017-04-18 | Cree, Inc. | Optical waveguide body |
US9581751B2 (en) | 2013-01-30 | 2017-02-28 | Cree, Inc. | Optical waveguide and lamp including same |
US9690029B2 (en) * | 2013-01-30 | 2017-06-27 | Cree, Inc. | Optical waveguides and luminaires incorporating same |
US9291320B2 (en) | 2013-01-30 | 2016-03-22 | Cree, Inc. | Consolidated troffer |
US9869432B2 (en) | 2013-01-30 | 2018-01-16 | Cree, Inc. | Luminaires using waveguide bodies and optical elements |
US9442243B2 (en) | 2013-01-30 | 2016-09-13 | Cree, Inc. | Waveguide bodies including redirection features and methods of producing same |
US9366396B2 (en) | 2013-01-30 | 2016-06-14 | Cree, Inc. | Optical waveguide and lamp including same |
US10436970B2 (en) | 2013-03-15 | 2019-10-08 | Ideal Industries Lighting Llc | Shaped optical waveguide bodies |
US9920901B2 (en) | 2013-03-15 | 2018-03-20 | Cree, Inc. | LED lensing arrangement |
US10502899B2 (en) * | 2013-03-15 | 2019-12-10 | Ideal Industries Lighting Llc | Outdoor and/or enclosed structure LED luminaire |
US9798072B2 (en) | 2013-03-15 | 2017-10-24 | Cree, Inc. | Optical element and method of forming an optical element |
US10379278B2 (en) * | 2013-03-15 | 2019-08-13 | Ideal Industries Lighting Llc | Outdoor and/or enclosed structure LED luminaire outdoor and/or enclosed structure LED luminaire having outward illumination |
US9645303B2 (en) | 2013-03-15 | 2017-05-09 | Cree, Inc. | Luminaires utilizing edge coupling |
US10400984B2 (en) | 2013-03-15 | 2019-09-03 | Cree, Inc. | LED light fixture and unitary optic member therefor |
US9366799B2 (en) | 2013-03-15 | 2016-06-14 | Cree, Inc. | Optical waveguide bodies and luminaires utilizing same |
US10209429B2 (en) | 2013-03-15 | 2019-02-19 | Cree, Inc. | Luminaire with selectable luminous intensity pattern |
US10416377B2 (en) | 2016-05-06 | 2019-09-17 | Cree, Inc. | Luminaire with controllable light emission |
US11719882B2 (en) | 2016-05-06 | 2023-08-08 | Ideal Industries Lighting Llc | Waveguide-based light sources with dynamic beam shaping |
US10739513B2 (en) | 2018-08-31 | 2020-08-11 | RAB Lighting Inc. | Apparatuses and methods for efficiently directing light toward and away from a mounting surface |
US10801679B2 (en) | 2018-10-08 | 2020-10-13 | RAB Lighting Inc. | Apparatuses and methods for assembling luminaires |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH389538A (de) * | 1961-08-29 | 1965-03-31 | Belmag Beleuchtungs & Metallin | Beleuchtungskörper mit Abschlussglas |
FR2668838A1 (fr) * | 1990-11-07 | 1992-05-07 | Faure Pierre | Dispositif a enceinte transparente munie d'une zone interne invisible de l'exterieur de l'enceinte. |
EP0513713A2 (de) * | 1991-05-15 | 1992-11-19 | AUGUST JORDAN GMBH & CO. | Leuchte mit einer stabförmigen Lichtquelle |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH156501A (fr) † | 1930-08-25 | 1932-08-15 | Works Corning Glass | Lentille à dispersion pour projecteurs. |
CH289538A (de) * | 1949-10-22 | 1953-03-15 | Rheinpreussen Ag | Verfahren zur Herstellung des Diäthylaminoäthylesters der 4-Amino-2-oxy-benzoesäure. |
DE875938C (de) † | 1951-09-29 | 1953-05-07 | Fritz Schnebel | Vorrichtung zum Abblenden von Lichtquellen |
GB953813A (en) † | 1962-03-15 | 1964-04-02 | Gen Electric Co Ltd | Improvements relating to lighting fittings and to refractors for use in such fittings |
GB1372024A (en) * | 1970-10-07 | 1974-10-30 | Oram J A | Lighting device |
US4188657A (en) * | 1973-07-13 | 1980-02-12 | Whiteway Manufacturing Co., Inc. | Reflector and method of producing different, distinctive and predictable light patterns therefrom |
DE7808786U1 (de) † | 1977-03-29 | 1978-07-13 | Zumtobel Ag, Dornbirn (Oesterreich) | Abdeckung aus lichtdurchlaessigem material fuer leuchtstofflampen |
US5183323A (en) * | 1982-09-29 | 1993-02-02 | Maurice Daniel | Flat panel illumination system |
CH664817A5 (de) † | 1984-10-17 | 1988-03-31 | Peter A Balla | Beleuchtung fuer geschlossene laengliche raeume. |
US5199787A (en) * | 1992-01-08 | 1993-04-06 | North American Philips Corporation | Reflector lamp having improved lens |
-
1998
- 1998-05-12 EP EP98890139A patent/EP0953800A1/de not_active Withdrawn
-
1999
- 1999-04-29 DK DK99917682T patent/DK1073862T4/da active
- 1999-04-29 AT AT99917682T patent/ATE235019T1/de active
- 1999-04-29 ES ES99917682T patent/ES2195562T5/es not_active Expired - Lifetime
- 1999-04-29 NZ NZ507603A patent/NZ507603A/en not_active IP Right Cessation
- 1999-04-29 WO PCT/AT1999/000107 patent/WO1999056058A1/de active IP Right Grant
- 1999-04-29 EP EP99917682A patent/EP1073862B2/de not_active Expired - Lifetime
- 1999-04-29 US US09/673,780 patent/US6400086B1/en not_active Expired - Fee Related
- 1999-04-29 AU AU35886/99A patent/AU755027B2/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH389538A (de) * | 1961-08-29 | 1965-03-31 | Belmag Beleuchtungs & Metallin | Beleuchtungskörper mit Abschlussglas |
FR2668838A1 (fr) * | 1990-11-07 | 1992-05-07 | Faure Pierre | Dispositif a enceinte transparente munie d'une zone interne invisible de l'exterieur de l'enceinte. |
EP0513713A2 (de) * | 1991-05-15 | 1992-11-19 | AUGUST JORDAN GMBH & CO. | Leuchte mit einer stabförmigen Lichtquelle |
Also Published As
Publication number | Publication date |
---|---|
DK1073862T3 (da) | 2003-06-23 |
EP1073862B1 (de) | 2003-03-19 |
ES2195562T5 (es) | 2007-11-01 |
ATE235019T1 (de) | 2003-04-15 |
NZ507603A (en) | 2002-05-31 |
EP1073862B2 (de) | 2007-03-14 |
AU3588699A (en) | 1999-11-16 |
ES2195562T3 (es) | 2003-12-01 |
AU755027B2 (en) | 2002-11-28 |
EP1073862A1 (de) | 2001-02-07 |
DK1073862T4 (da) | 2007-07-16 |
US6400086B1 (en) | 2002-06-04 |
EP0953800A1 (de) | 1999-11-03 |
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