EP0580631A1 - Leuchtenabdeckung, insbesondere für leuchtstofflampen. - Google Patents
Leuchtenabdeckung, insbesondere für leuchtstofflampen.Info
- Publication number
- EP0580631A1 EP0580631A1 EP92907486A EP92907486A EP0580631A1 EP 0580631 A1 EP0580631 A1 EP 0580631A1 EP 92907486 A EP92907486 A EP 92907486A EP 92907486 A EP92907486 A EP 92907486A EP 0580631 A1 EP0580631 A1 EP 0580631A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lamp cover
- curves
- lamp
- light
- luminaire
- 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.)
- Granted
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
- F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
-
- 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
- F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
-
- 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
- F21V3/00—Globes; Bowls; Cover glasses
- F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
-
- 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
Definitions
- Luminaire cover especially for fluorescent lamps
- the subject of the present innovation is a luminaire cover according to the preamble of protection claim 1.
- Such luminaire covers have become known in various designs, these luminaire covers being transparent or translucent and suitable for covering the luminaire upwards and / or downwards.
- a known such structure is e.g. grooves running in the longitudinal direction of the lamp cover, directed parallel to one another and at a mutual distance from one another, which form a triangular structure (prism structure) in cross section (profile).
- the disadvantage of this known luminaire cover with prism structure is that streaks can form on illuminated surfaces and that shading elements lying in the beam path lead to undesired visibility, i.e. such elements can still be easily recognized from the outside. As far as one wants to avoid such shadows, it is known to make such lamp covers also opal. However, there is the disadvantage that relatively high scattering losses arise. This has the disadvantage that the lamp cover still appears bright even from relatively flat viewing angles, which is undesirable in some applications.
- the object of the present innovation is to improve a luminaire cover of the type mentioned at the outset in such a way that, while avoiding an opal structure, which entails losses in efficiency, a targeted beam expansion without scattering losses and with a kind of soft focus effect is achieved.
- the innovation is characterized by the technical teaching of claim 1. It is essential that on at least one side of the lamp cover the surface is provided with a wave-shaped structure, this wave-shaped structure extending perpendicular to the longitudinal axis of the lamp cover and the number of wave trains in the range of at least three, preferably ten and a maximum of 1,000 per lamp width, and that the wave trains are continuously changing curves, these curves being designed either as sine curves or as constantly changing radius curves.
- the corrugated structure accordingly forms longitudinal grooves which run parallel to the longitudinal axis of the fluorescent lamp.
- An essential feature of the present innovation is that a kind of soft focus effect is achieved with the structure according to the innovation, i.e. there is a "beam expansion", which means the following:
- the technical teaching according to the present innovation achieves that the beam of rays when irradiating in the same direction the structure is widened and widened without generating additional scattering.
- Another important advantage of the present innovation is that with the lighting cover according to the innovation, directed radiation can be generated in a very specific area, so that - if you look at the lamp cover from a flat angle, it appears dark because in such flat radiation areas there is no radiation more is given.
- Such a lamp cover is preferably used for covering a fluorescent lamp, provided that the structures (grooves) described extend in their longitudinal axis parallel to the longitudinal axis of the fluorescent lamp.
- FIG. 1 polar diagram of the intensity of a beam of rays incident on the structure
- Figure 2 Polar diagram of the intensity of a beam leaving the structure
- Figure 3 Representation of the law of refraction on a refractive surface
- FIG. 4 shows the refraction of a part of a refractive structure
- Figure 5 an application example of a refractive structure with details of the proportions
- Figure 6 an end view of a lamp cover after the innovation
- Figure 7 a larger partial section through the lamp cover according to Figure 6.
- a bundle of rays 1 falls on a translucent structure, the beam of rays incident on a structure in the polar diagram of the intensity being relatively narrow, that is to say related is strongly focused on the intensity.
- FIG. 2 shows the success of the present innovation, namely that a beam 2 leaving the structure is strongly directed, but has a certain beam expansion, the angle gamma representing half of the desired beam expansion.
- the radiation beam 2 which leaves the structure, is directed relatively strongly and contains essentially no scatter component. Moreover, it is essential that it is directed in the same direction as the incident beam 1, which means that the luminaire cover according to the invention emits a directed light, in contrast to opal covers that only scatter.
- the prism structures mentioned above because such prism structures do not expand the beam, but only deflect it, i.e. the incident beam is emitted in a different direction. This is not the purpose of the present innovation.
- FIG. 3 shows the refraction law in general form when a specific beam hits the refractive surface at an angle alpha and leaves it at an angle beta.
- n is the refractive index
- FIG. 4 A wavy structure 3 is shown in FIG. 4, the structure of the surface of the lamp cover being designed with this structure.
- the parameter a defines half the width of the structure, while the parameter h defines half the depth of the structure.
- angle alpha is the maximum permissible angle, which thus describes the maximum permissible deviation of the wavy structure 3 from a parallel plate 4.
- angle alpha is also to be understood as the maximum permissible tangent angle to the wavy structure 3.
- This formula describes a dimension specification for the wavy structure, with some values in FIG. 5 being calculated in relation to different structures of the wavy structure 3.
- FIGS. 6 and 7 show an example of such a lamp cover 5.
- a lamp would be arranged at position 6, the upper side of the lamp cover 5 (upper side 7) facing away from the lamp being made smooth for reasons of cleanliness.
- the underside (the side 8 facing the lamp) bears the wavy structure 3 described above.
- both the top 7 and the bottom 8 carry such a wavy structure.
- the lamp cover 5 can serve a wide variety of known lighting purposes, namely to cover the lamp at position 6 upwards and also to cover the lamp downwards or on a side to be irradiated.
- the luminaire cover according to the innovation surrounds the luminaire from all sides. 7 shows further details of the wave-shaped structure 3.
- the reference lines 9 are here symmetrical to an averaged surface 10.
- the material thickness 11 of e.g. 2.4 mm can be varied within a wide range and depends on the material properties of the material used.
- Points 12 and 13 describe the distance between two wave crests, with straight lines 14, 15 passing through these points 12, 13 and intersecting at opposite points 16, 17 of the opposite reference line.
- the angle 18 between the straight lines 14, 15 is then, for example, 33, 42 °.
- the present invention therefore relates to the use of a “targeted” groove structure in a luminaire cover, which was described in the present exemplary embodiment only for use with a fluorescent lamp.
- a fluorescent lamp e.g., a fluorescent lamp.
- the groove structures would then not run parallel to the longitudinal axis of the fluorescent lamp described above, but the groove structures would be concentric groove structures or also locally concentric Groove structures, such ring structures being distributed over the surface of a lamp cover.
- the wavy structure there are preferred dimensions for the wavy structure, the upper limit depending only on the material's technical properties and on the tool used to apply the wavy structures.
- a lamp cover made of Macrolon for example, a thin film can also be used, the wavy structures described above being molded into this structure in the micrometer range.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9104316U DE9104316U1 (de) | 1991-04-10 | 1991-04-10 | Leuchtenabdeckung, insbesondere für Leuchtstofflampen |
DE9104316U | 1991-04-10 | ||
PCT/EP1992/000684 WO1992018805A1 (de) | 1991-04-10 | 1992-03-27 | Leuchtenabdeckung, insbesondere für leuchtstofflampen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0580631A1 true EP0580631A1 (de) | 1994-02-02 |
EP0580631B1 EP0580631B1 (de) | 1997-05-07 |
Family
ID=6866133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92907486A Expired - Lifetime EP0580631B1 (de) | 1991-04-10 | 1992-03-27 | Leuchtenabdeckung, insbesondere für leuchtstofflampen |
Country Status (5)
Country | Link |
---|---|
US (1) | US5486990A (de) |
EP (1) | EP0580631B1 (de) |
AT (1) | ATE152820T1 (de) |
DE (2) | DE9104316U1 (de) |
WO (1) | WO1992018805A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4127745A1 (de) * | 1991-08-22 | 1993-02-25 | Fischer Artur Werke Gmbh | Vorrichtung zur herstellung von bohrloechern mit hinterschneidung |
US6386723B1 (en) | 1999-02-25 | 2002-05-14 | Steelcase Development Corporation | Tasklight for workspaces and the like |
US6644830B2 (en) | 2001-12-03 | 2003-11-11 | Cooper Technologies Company | High output lamp softener |
DE10354463A1 (de) * | 2003-11-21 | 2005-06-23 | Zumtobel Staff Gmbh | Leuchte mit transparentem Lichtaustrittselement |
DE202006018617U1 (de) * | 2006-12-08 | 2008-04-17 | Zumtobel Lighting Gmbh | Transparente Lichtbeeinflussungsplatte sowie Leuchte mit einer solchen |
CN102128421A (zh) * | 2010-01-18 | 2011-07-20 | 奥斯兰姆有限公司 | 灯壳、具有该灯壳的灯以及灯壳制造方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2334005A (en) * | 1941-08-05 | 1943-11-09 | Pittsburgh Reflector Company | Illuminating fixture |
US2782297A (en) * | 1953-06-29 | 1957-02-19 | Gen Electric | Light projection device |
US3431449A (en) * | 1966-08-05 | 1969-03-04 | Arthur R Brown | Non-glare sealed beam headlights |
US3763369A (en) * | 1971-11-18 | 1973-10-02 | Holophane Co Inc | Refractive grid |
DE3543292C2 (de) * | 1985-12-07 | 1994-06-09 | Cristallux Werk Waldachtal Gmb | Platten- oder schalenförmige Lichtabdeckung, ein Verfahren zu ihrer Herstellung, sowie eine Vorrichtung zur Durchführung des Verfahrens |
US5043856A (en) * | 1989-03-08 | 1991-08-27 | Gte Products Corporation | Lighting lens |
US4930051A (en) * | 1989-04-07 | 1990-05-29 | General Electric Company | Headlamp with sloped lens including beam-spreading flutes |
US5040104A (en) * | 1990-03-19 | 1991-08-13 | Herman Miller, Inc. | Task light panel |
-
1991
- 1991-04-10 DE DE9104316U patent/DE9104316U1/de not_active Expired - Lifetime
-
1992
- 1992-03-27 EP EP92907486A patent/EP0580631B1/de not_active Expired - Lifetime
- 1992-03-27 US US08/133,016 patent/US5486990A/en not_active Expired - Fee Related
- 1992-03-27 WO PCT/EP1992/000684 patent/WO1992018805A1/de active IP Right Grant
- 1992-03-27 DE DE59208463T patent/DE59208463D1/de not_active Expired - Fee Related
- 1992-03-27 AT AT92907486T patent/ATE152820T1/de not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9218805A1 * |
Also Published As
Publication number | Publication date |
---|---|
US5486990A (en) | 1996-01-23 |
EP0580631B1 (de) | 1997-05-07 |
DE9104316U1 (de) | 1991-06-13 |
DE59208463D1 (de) | 1997-06-12 |
WO1992018805A1 (de) | 1992-10-29 |
ATE152820T1 (de) | 1997-05-15 |
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