EP0854317A2 - Réflecteur et lampe comprenant un tel réflecteur - Google Patents

Réflecteur et lampe comprenant un tel réflecteur Download PDF

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Publication number
EP0854317A2
EP0854317A2 EP98100232A EP98100232A EP0854317A2 EP 0854317 A2 EP0854317 A2 EP 0854317A2 EP 98100232 A EP98100232 A EP 98100232A EP 98100232 A EP98100232 A EP 98100232A EP 0854317 A2 EP0854317 A2 EP 0854317A2
Authority
EP
European Patent Office
Prior art keywords
reflector
involute
light source
contour
legs
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.)
Withdrawn
Application number
EP98100232A
Other languages
German (de)
English (en)
Other versions
EP0854317A3 (fr
Inventor
Dieter Dr. Hofman
Ulrich Binder
Lothar Dr. Hitzschke
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0854317A2 publication Critical patent/EP0854317A2/fr
Publication of EP0854317A3 publication Critical patent/EP0854317A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • 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
    • F21V7/0058—Reflectors for light sources adapted to cooperate with light sources of shapes different from point-like or linear, e.g. circular 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/37—U-shaped

Definitions

  • the invention is based on a reflector according to the preamble of the claim 1. It is particularly a reflector for extended Light sources, especially around elongated light sources such as multi-legged ones or ring-shaped fluorescent lamps or similar shaped electrodeless, Microwave excited lamps (see DE-OS 2 601 666). Under The term light source is also intended to be a radiation source, the IR or UV radiation emitted can be understood.
  • DE-OS 27 55 253 is already a channel reflector for an elongated one rod-shaped light source, in particular a fluorescent lamp, is known, whose intersection curve consists partly of two adjoining involutes (see below) is formed.
  • the two involute branches either touch each other not at all and end on the light source, in relation to the light exit opening behind the light source, or they touch behind the Light source (related to the light exit opening) at a certain distance from the light source. This intersection of the two involutes should be in the hereinafter referred to as the vertex.
  • EP-A 442 246 describes a very similar reflector for a rod-shaped one Light source known, the intersection of two mirror-symmetrical involute branches form, whose apex is also behind the light source and exactly in the normal to the light exit opening. The involutes leave towards the light exit opening in parabolic branches.
  • the following is a reflector for a radiation source with two legs with circular or elliptical or similar Cross section (e.g. a fluorescent lamp in compact form or U-shaped bent) described, which reflects all light past the light source and thus avoids losses due to self-absorption.
  • a radiation source with two legs with circular or elliptical or similar Cross section (e.g. a fluorescent lamp in compact form or U-shaped bent) described, which reflects all light past the light source and thus avoids losses due to self-absorption.
  • the reflector has the property of being the smallest possible Has dimensions.
  • the angular distribution of the radiation intensity remains (Indicatrix) open. This can be achieved through specific deviations from the described Reflector profile can be influenced.
  • the calculation principle developed here provides a limit curve that in practice applies to the respective Application can be adapted, with compromises then Efficiency and / or reflector size can be entered.
  • the cutting contour of the reflector can be found near the light exit opening described, for example, by parabolas or oblique plane surfaces be.
  • a radiation source 1 has a circular cross-section with the radius R.
  • the radiation it emits is completely reflected past the source when the cutting line of the reflector is an involute (a simple derivation of this spiral curve is given, for example, in K. S ⁇ RENSEN: Design of Optical Systems for Luminaires, The Lighting Journal, pp. 5-7, March 1990).
  • An involute fulfills the condition that the following applies to every part of the reflector: The boundary beam emitted tangentially from a point K on the surface of the light source 1 in the direction of any reflector point L must be reflected past the source on the right.
  • the starting point of the involute on the surface of the light source is indicated by ⁇ 0 .
  • ⁇ 0 The size ⁇ 0 is referred to below as the angle of rotation.
  • any section of the above involute can be used as a reflector to be chosen.
  • a section can be used that does not attach to the surface of the light source. It can also be additional the mirror image can be used, i.e. an involute that opposes each other opens.
  • FIG. 1 shows as an example a reflector 2 for a light source 1 with a circular cross-section, whose intersection curve 3 meets the above conditions.
  • From two opposing involute branches 3a and 3b become the curve parts AB and BF used.
  • the light exit opening 4 (level through the Points A and F) is at the height of the lower edge of the lamp.
  • This arrangement only radiates into the lower half space.
  • the two involute branches were put together so that they were in the apex, namely the common point B, start from the lamp surface.
  • the above principle can be modified by a suitable modification can also be applied to lamps with two legs.
  • the cut surface of the reflector consists of a total of four involute branches. Two each are one leg of the light source assigned. The arrangement with respect to the other leg is mirrored axially symmetrical, with the axis in the middle between the Thighs runs.
  • the apex of the two involute branches assigned to one leg is not arranged behind the light source as before (i.e. from the plane of the Light exit opening seen approximately in their normal), but on the other hand, rotated by 90 ° and towards the second leg.
  • a certain margin is allowed, the size of which is approximately as defined above Corresponds to the angle diameter.
  • the vertex is between the two Don’t.
  • the length of the two involute branches is determined by this arrangement very different.
  • the angular length of the longer branch is more than 180 °, that of the shorter branch significantly less than 90 °. Especially the shorter branch ensures that no radiation from the first leg falls on the second.
  • the contour of the reflector at least partially from sections of involutes is formed. Two sections touch at a vertex.
  • the contour has a total of four involute sections, one of which two oppositely oriented involutes each one leg of the Light source are assigned.
  • the arrangement is rotationally symmetrical (in Case of ring-shaped lamps) or axially symmetrical (in the case of an elongated one Light source) with respect to an axis that lies in the middle between the is stretched two legs, the apex approximately on the the middle of the legs connecting straight lines lies, so that a longer one and a shorter involute section (branch) is assigned to one leg is.
  • Both the two longer and the two shorter involute branches usually touch between the two legs.
  • the two Points of contact span an (imaginary) straight line that defines the axis of symmetry of the reflector.
  • the contour of the reflector can have other sections that form the indicatrix the radiation emitted to the target to adjust.
  • another section can be longer Apply involute branch and in particular have parabolic shape or as be inclined plane surface.
  • a support or Partition made.
  • the partition can in particular between the two points of contact (B and D in Fig. 2) of the involutes extend.
  • the partition has at least the two shorter ones Involute branches as a contour.
  • the partition can also include a contour near the vertex of the longer involute. Some of the shorter involute branches can also be missing, in particular these branches can also be missing entirely.
  • the partition often has a simplified one compared to the involute Contour, for example an oblique or straight wall.
  • the reflector according to the invention can be used as a channel reflector for a lamp be used, the light source is a lamp, the bulb two parallel Owns thigh.
  • the light source is a lamp, the bulb two parallel Owns thigh.
  • it can be an electrodeless one Act lamp with a closed bulb, the bulb in plan view, be a tube with an oval or approximately rectangular shape can.
  • a conventional fluorescent lamp with a curved U-shaped tube or other light source can be used.
  • an annular or two-legged light source is used Electrodeless lamp in question, in which the two legs of the lamp vessel are connected at both ends and so a closed Form tube.
  • the self-contained tube preferably forms one Oval or rounded rectangle.
  • Such a lamp is for example in PCT / EP96 / 03180 (Art. 54 (3)). In principle, however, is any other Radiation source with two legs is also suitable.
  • Figure 2 shows a reflector 5 according to the invention for a lamp whose Piston has a first and second elongated legs 6a and 6b.
  • the reflector contour consists of a total of four involute branches 7a-d, von which the two oppositely oriented involute sections 7a and 7b are assigned to the first leg 6a of the light source, while the two oppositely oriented involute sections 7c and 7d the second Leg 6b of the light source are assigned.
  • the arrangement of the involute branches is axially symmetrical with respect to a plane Z that spans in the middle between the two legs 6a and 6b is.
  • the two oppositely oriented involute sections 7a and 7b associated with the first leg 6a of the light source a common vertex C, this vertex on the
  • the middle of the two legs 6a and 6b connecting straight line X lies so that each a longer (7a) and a shorter (7b) involute section (branch) is assigned to the first leg 6a.
  • the longer one Branch 7c and the shorter branch 7d have a common vertex E on the straight line X.
  • the height h 4.6 R.
  • the reflector contour here consists of the curve sections AB, BC, CD, DE, EB and BF. They are designed so that no radiation on the source is reflected back.
  • the two lower reflector parts CD and DE and possibly also the upper BC and EB can at least partially disappear when radiation is abandoned.
  • FIG. 3 shows a reflector which essentially corresponds to that in FIG. 2.
  • the involute branches 10a and 10b associated with the first leg 11a are, however, have a different origin on the piston surface, accordingly another, smaller difference in the angle of rotation.
  • a, b and h leg distance, width and Height of the reflector
  • a 1.35 R
  • b 12.9 R
  • h 4.2 R. So a decreases most strongly. That is, the closer points C and E are to move the piston surface, the smaller the distance a between the thighs without radiation being reflected on the lamp.
  • a, b and h given in FIGS. 2 and 3 are calculated values without considering the physical reflector wall thickness d. In the Practice must be added to d or 2d. The thickness of a partition (see below) is not considered.
  • FIG. 4 shows a reflector which is modified in such a way that the longer involute branch 14a, starting from the vertex C, does not reach the light exit opening (point A), but only up to point T 1 .
  • a section of the reflector contour is designed as a parabola 14c (or also as an oblique plane surface 14d, shown in broken lines in FIG. 4).
  • a separating web 16 Between the two legs 15a and 15b there is a separating web 16, the contour of which follows the sections BC and BE of the longer involute branches and part of the shorter involute branches 14b, namely CD and ED. The remaining part of the shorter involute branch 14b is omitted.
  • FIG. 5 shows a further exemplary embodiment of a rotationally symmetrical or axially symmetrical reflector, in which the apices S 1 and S 2 lie on a straight line inclined upward by approximately 10 ° with respect to the connecting line X, specifically between the two intersecting circles of the ring or the two legs 22a and 22b of a piston shaped as a U.
  • the dividing wall 20 has a contour which comprises the section BS 1 of the longer involute branch 21a and a replacement contour for the shorter involute branch, namely a slope 21b.
  • the right half of the cut surface of the reflector is designed to be rotationally symmetrical or, again, a mirror image of the left half.
  • FIG. 6a is a lamp 30 is a highly schematic plan view of the light exit opening shown in the case of an annular compact electrodeless Fluorescent lamp 31 with a bulb 22.
  • FIG. 6b shows one similar lamp 40 with a channel reflector and a U-shaped Fluorescent lamp 44, in which the connecting bow 41 (shown in dashed lines) and the base 42 are each covered by panels 43.
  • FIG. 7 shows a lamp 50 in plan view from the light exit opening, that of a channel reflector 51, as shown below in FIG. 8 (or also for example in Figure 4 or 5), in connection with a electrodeless fluorescent lamp 52 exists.
  • the lamp consists of a Housing with two long sides 53 and two short sides 55.
  • the fluorescent lamp 52 is centered in the housing. It consists of one tubular discharge vessel that forms a closed loop that there are two long legs 54, 56 and two short connecting parts 58, 60.
  • the connecting parts 58, 60 are each of ferrite transformer cores 62, 64 surrounded with windings, with the help of which the lamp is also fixed in the reflector is.
  • the long legs 54, 56 are axially parallel to the axis of the channel reflector 51 arranged.
  • the short sides 55 of the reflector are mirrored.
  • the reflector contour consists of a longer involute branch which extends from the apex line S 1 to the opening on the line containing the point A.
  • the shorter involute branch lies between the two legs 54, 56 and extends from the apex S 1 to the line containing the end point D at the light exit opening.
  • a simplified curve shape for example a slope as in FIG. 5 can also be used.
  • Figure 8 is the section of the reflector 51 for the electrodeless fluorescent lamp 52 shown with two legs 54 and 56.
  • the legs 54 and 56 are by connecting parts 58, 60 (the latter is not visible) with at least connected to a ferrite core 62.
  • the core 62 is through a support member 65 attached to the housing.
  • an electrodeless fluorescent lamp with an output of 150 W is used as the lamp, the legs of which have a tube diameter of approximately 52 mm and are therefore much thicker than conventional fluorescent lamps.
  • this lamp achieved a luminaire efficiency of almost 90% compared to approximately 70% for a conventional channel reflector.
  • the reflector housing has a width of approximately 350 mm and a height of 110 mm.
  • the distance T between the lamp legs is about 33 mm.
  • the reflector 51 is a minimal reflector whose vertices (or actually lines) S 1 and S 2 lie on the connecting line X and lie directly on the legs.
  • the reflector contour consists of two short and long involute branches 59a, 59b and 61a, 61b.
  • the attached Cartesian coordinate system gives an impression of the size of the lamp (details in mm).
  • bevel Flat surfaces (or parabolas), you get a lamp with an almost cosine shape Light distribution.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP98100232A 1997-01-20 1998-01-08 Réflecteur et lampe comprenant un tel réflecteur Withdrawn EP0854317A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19701793 1997-01-20
DE19701793A DE19701793A1 (de) 1997-01-20 1997-01-20 Reflektor und Leuchte mit einem derartigen Reflektor

Publications (2)

Publication Number Publication Date
EP0854317A2 true EP0854317A2 (fr) 1998-07-22
EP0854317A3 EP0854317A3 (fr) 1999-07-28

Family

ID=7817815

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98100232A Withdrawn EP0854317A3 (fr) 1997-01-20 1998-01-08 Réflecteur et lampe comprenant un tel réflecteur

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EP (1) EP0854317A3 (fr)
JP (1) JPH10214507A (fr)
CA (1) CA2227347A1 (fr)
DE (1) DE19701793A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19819221A1 (de) * 1998-04-29 1999-11-11 Siteco Beleuchtungstech Gmbh Leuchte für eine elektrodenlose Leuchtstofflampe

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19850865A1 (de) * 1998-11-04 2000-05-11 Industrieservis Ges Fuer Innov Lampen- und Reflektoranordnung
US20080178927A1 (en) * 2007-01-30 2008-07-31 Thomas Brezoczky Photovoltaic apparatus having an elongated photovoltaic device using an involute-based concentrator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2601666A1 (de) 1975-01-20 1976-07-22 Gen Electric Elektrodenlose fluoreszenzlampe mit integraler vorschaltanordnung
DE2755253A1 (de) 1976-12-21 1978-06-22 Poulsen & Co As L Spiegelnder reflektor
EP0442246A2 (fr) 1990-02-16 1991-08-21 TARGETTI SANKEY S.p.A. Réflecteur anti-éblouissant pour sources lumineuses

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR949146A (fr) * 1947-06-30 1949-08-22 Saunier Anciens Ets Sources lumineuses de grandes dimensions
US3064123A (en) * 1956-02-29 1962-11-13 Westinghouse Electric Corp Luminaire
AU4387279A (en) * 1978-02-01 1979-08-09 University Of Sydney, The Linking reflector
DE59100856D1 (de) * 1991-01-31 1994-02-24 Siemens Ag Spiegelleuchte.
JPH06302209A (ja) * 1993-04-15 1994-10-28 Keikoo Kk 列設放射源用インボリュート形反射板

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2601666A1 (de) 1975-01-20 1976-07-22 Gen Electric Elektrodenlose fluoreszenzlampe mit integraler vorschaltanordnung
DE2755253A1 (de) 1976-12-21 1978-06-22 Poulsen & Co As L Spiegelnder reflektor
EP0442246A2 (fr) 1990-02-16 1991-08-21 TARGETTI SANKEY S.p.A. Réflecteur anti-éblouissant pour sources lumineuses

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19819221A1 (de) * 1998-04-29 1999-11-11 Siteco Beleuchtungstech Gmbh Leuchte für eine elektrodenlose Leuchtstofflampe
EP0953802A3 (fr) * 1998-04-29 2001-10-31 Siteco Beleuchtungstechnik GmbH Dispositif d' éclairage pour lampe fluorescente sans électrodes

Also Published As

Publication number Publication date
CA2227347A1 (fr) 1998-07-20
JPH10214507A (ja) 1998-08-11
DE19701793A1 (de) 1998-07-23
EP0854317A3 (fr) 1999-07-28

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