EP1526329A1 - Reflektor für eine ringförmige Leuchtstofflampe - Google Patents

Reflektor für eine ringförmige Leuchtstofflampe Download PDF

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Publication number
EP1526329A1
EP1526329A1 EP03024290A EP03024290A EP1526329A1 EP 1526329 A1 EP1526329 A1 EP 1526329A1 EP 03024290 A EP03024290 A EP 03024290A EP 03024290 A EP03024290 A EP 03024290A EP 1526329 A1 EP1526329 A1 EP 1526329A1
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EP
European Patent Office
Prior art keywords
reflector
circular lamp
circular
plane
lamp
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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
Application number
EP03024290A
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English (en)
French (fr)
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EP1526329B1 (de
Inventor
Jean-Pierre Pizziga
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to AT03024290T priority Critical patent/ATE338247T1/de
Priority to DE60308030T priority patent/DE60308030D1/de
Priority to EP03024290A priority patent/EP1526329B1/de
Publication of EP1526329A1 publication Critical patent/EP1526329A1/de
Application granted granted Critical
Publication of EP1526329B1 publication Critical patent/EP1526329B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular

Definitions

  • the invention relates to luminaires, such as luminaires for indoor lighting or exterior, of surfaces or of premises, for industrial use, commercial, tertiary or private.
  • luminaires comprising a circular lamp, arranged in front of a reflector.
  • Fixtures with fluorescent tube (s) fluorescent (s) rectilinear (s) with two bases, hereinafter referred to as “tube (s) ", are commonly used for a long time especially for lighting premises.
  • These known luminaires usually comprise one or more tubes disposed in the vicinity of the ceiling of the room to be illuminated.
  • the tubes are generally placed in front of a reflector or partially surrounded by the reflector so as to concentrate the luminous flux towards a useful zone (the ground for example) of the local concerned.
  • a luminaire of this type is described in WO-97/43578.
  • the reflector in the form of an inverted V, comprises two profiled or curved wings whose intersection generates a line segment positioned above and in the longitudinal axis of the tube.
  • a constraint related to the use of the tubes is that the technical luminaires designed to direct the light to a useful area must have at least the length of the tube, which can make them bulky.
  • a luminaire wherein the tube is bent to form a lamp tubular circular or toroidal, that is to say having the form of an annular torus.
  • the circular lamp is surrounded by a reflector in the shape of an inverted half-torus. This reflector has the property to reflect the majority incident rays of light reaching it, on an annular surface of the soil, while hiding partially the tube in plain sight in order to respond to particular comfort criteria, forming a zone circular center poorly lit.
  • the invention aims to constitute a set inseparable uniting a compact tube and a reflector of new design, able to provide the luminaire which contains a comparable useful light output the best luminaires for tubes.
  • the invention relates specifically to a reflector designed to optimize the luminous efficiency of a luminaire equipped with a circular lamp, the reflector being characterized in that it comprises a succession of annular facets, each of which has a circular edge in a plane, parallel to the plane of the circular lamp and which are oriented so that the rays of light reflected by them, generated by incident rays of the circular lamp, form with the axis of revolution of said circular lamp, an angle to maximum equal to a predetermined angle, hereinafter referred to as "target angle ", a definition of which will be provided later.
  • useful luminous efficiency of a luminaire means the ratio between the average illuminance level measured on the intended useful plane and the amount of energy required to obtain it.
  • the reflector according to the invention is intended for a circular lamp.
  • the term "circular lamp” refers to a ring of light of circular or similar shape.
  • the luminous crown usually comprises a curved tube forming a torus, that is to say a solid of revolution generated by a circle which rotates about a straight line in its plane, and which does not cut it.
  • the invention is however not limited to bent tubes torus-shaped and applies equally to any type of light corona. It applies in particular to the light crowns formed of a succession of individual sources of light, powered by electrical or non-electrical energy, for example electric light bulbs.
  • the operating mode of the circular lamp is not critical. It can be indifferently incandescent circular lamp, circular lamp arc, a luminescent circular lamp, a lamp circular fluorescent wall, or any source adequate light.
  • the crown of light is circular in shape or assimilated.
  • plane of the lamp designates the geometric plane defined by the circular geometric axis of the circular lamp.
  • axis of revolution of the lamp designates the rectilinear geometric axis passing through the center of the circular lamp, perpendicular to the plane of the circular lamp.
  • discoidal space designates the cylindrical space that fits inside the annular torus constituting the circular lamp.
  • the plane of the lamp circular can be horizontal, vertical or oblique.
  • the circular lamp is usually arranged horizontally in the vicinity of the ceiling of the local and its plane is then substantially horizontal.
  • the invention however also applies to luminaires in which the circular lamp occupies a another position, for example a vertical position or an oblique position. This is particularly the case when fixture is placed on a vertical wall or on a pylon or when used in the manner a source of lighting on a moving machine or when is portable.
  • the " technical reflector" which, associated with the circular lamp, is the subject of the patent has for mission to reflect to a useful area to illuminate, the incident light rays emitted by the circular lamp and reaching it
  • useful area to be illuminated means a surface considered as plane, which is arranged facing the circular lamp and which crosses its axis of revolution.
  • An " incident ray” is, by convention, a rectilinear ray of light, supposed to come from the circular axis of the circular lamp.
  • a " reflected ray” is, by convention, a rectilinear ray of light from the reflector and resulting from an incident ray reaching it.
  • the reflector comprises a succession of annular facets which each have a circular edge in a common plane, parallel to the plane of the circular lamp. Subsequently, this common plane will be designated "plane of the reflector".
  • the aforementioned annular facets are inclined relative to the plane of the reflector, forming frustoconical surfaces. The angle of inclination of these " inclined facets" is calculated according to the direction sought for the rays reflected by them.
  • the inclined facets can be obtained by any suitable means. They can be isolated facets or formed by grooves carved in a plane disk forming the plane of the reflector. Between the inclined facets, the reflector can generally include "flat circular facets ". These are usually located in the plane of the reflector. However, nothing prevents one or more of them being located in another plane, parallel to the plane of the reflector.
  • flatness modification is meant the digging of grooves or the elevation of planes with respect to the plane of the reflector, in order to form the inclined facets.
  • digging and “elevation” are used here for purely pictorial purposes and do not prejudge the method to be used to obtain the results. It is the material retained for the realization of the reflector which determines the means of shaping to use.
  • the specular face or face facing the circular lamp thus sees its flatness modified by grooves or concentric growths, whenever the angle of attack of an incident ray must be modified to generate a reflected ray inside the circular lamp. the target angle (a definition of which will be provided later), as well as in inter-reflections situations so as to make the reflected rays useful.
  • the facets of the reflector according to the invention are made of a material capable of reflecting the electromagnetic radiation of the visible spectrum. It is generally made of a material whose finish specular has a great reflective power.
  • the shape original reflector is that of a disc whose plane is parallel to the plane of the circular lamp.
  • target angle which is the angle defined by the ridge (or apothema) and the axis (or height) of this cone, is the angle between which the maximum of the reflected rays deflected by the technical reflector.
  • the distance separating plane of the reflector of the plane of the circular lamp is ponderedly known.
  • the mode of construction of the luminaire and the accessories used are part of the elements that the determine.
  • the socket fixed on the reflector may be considered imposed by the dimensions of the socket fixed on the reflector to ensure both the power supply of the circular lamp as its mechanical fixation which, it, determines the position of the plane of the lamp circular.
  • the possible additional support (s) of the circular lamp are adjusted to ensure its fixation and positioning in the plane of the circular lamp.
  • each fraction of the technical reflector must participate in achieving the goal that is to obtain from the reflector-lamp assembly, considered in as a fixture, the best light output possible.
  • the dimensions and the relative position of each of the components as well as the chosen target angle will generate the modification of the plane of the reflector in a series of concentric, parallel circular planes or oblique to the plane of the circular lamp.
  • the part central reflector in the form of a set (tron) conic, will have the task of intercepting orient the incident light rays of a part of the discoidal space.
  • the position of the facets and their orientation are arranged in such a way that the aforementioned reflected rays are outside the circular lamp.
  • the circular lamp does not prevent the propagation of the reflected rays towards the useful zone.
  • At least a part of the facets are symmetrical by relative to a cylindrical surface generated by the axis Circular geometric circular lamp.
  • the reflector technique preferably comprises at least one pair of inclined facets, which have a circular edge common to the intersection of the plane of the reflector and cylindrical surface aforesaid.
  • this one includes a frustoconical surface in the discoidal space bounded by the circular lamp.
  • the small base of the surface frustoconical is located in the plane of the lamp circular and its large base is set back from audit plan of the circular lamp and is located in the plane of the reflector.
  • the frustoconical surface makes advantageously with the axis of revolution of the lamp circle, an angle such as to any incident ray of the circular lamp, which strikes said frustoconical surface, it corresponds to a ray reflected in one direction making, with said axis of revolution, an angle less than or equal to the target angle. This angle is preferably equal to 135 degrees.
  • the position of the said frustoconical surface is preferably adjusted so that any ray reflected by it crosses the space discoidal above, without hitting the circular lamp.
  • the technical reflector comprises a conical surface in the discoidal space delimited by the circular lamp.
  • the conical surface has its vertex on the axis of revolution of the circular lamp and its base in the plane of said circular lamp.
  • the invention also relates to a luminaire comprising a circular lamp and a reflector according to the invention, as defined more above.
  • Figure 1 is a cross-section following a plane passing through the axis of revolution of the lamp circular (and reflector);
  • Figure 2 shows, on a larger scale, a detail of the luminaire of figure 1, equipped with a form particular embodiment of the technical reflector according to the invention. It represents, for one of the multiple variants, the sequence of the numerous corrections to the initial flatness of the reflector.
  • a 360 ° rotation around the axis of reflector revolution draws, in space, the shape of the specular face of the technical reflector as well as its circular lamp.
  • the radius of the reflector and the congestion of the cone on its axis of revolution, which depend in particular on the dimensions of the luminaire could contain it, are known to be known.
  • Figure 3 shows, on a large scale, a detail constructive of a variant of the reflector of FIGS. and 2.
  • the luminaire shown in FIGS. 1 and 2 comprises a circular or toroidal annular lamp 1 and a technical reflector according to the invention, designated, as a whole, by the reference notation 2.
  • the circular lamp 1 may for example consist of a tube fluorescent. It is arranged next to an area useful to illuminate (not shown), defined by the angle solid X in the center of the torus 1.
  • the angle X is the angle target defined above.
  • circular lamp 1 is for example suspended from the ceiling of the room and its plane 7 is substantially horizontal.
  • the sectional view of the half-reflector 2 is shown on a larger scale in FIG. 2.
  • the reflector 2 comprises a plane disc 17 situated above the circular lamp 1 and parallel to the plane 7 thereof.
  • the disc 17 is hollowed out with grooves forming inclined annular facets DC, Dx, xF, Gy, yH, Hz, zI, Ja, aK 1 , K 1 -b, bK 2 , K 2 -c, cK 3 , K 3 - d, dK.
  • Two horizontal facets FG and IJ located in the plane 17 of the reflector join the facets xF and Gy, on the one hand, and the facets zI and Ja, on the other hand.
  • the inclined facets YH and Hz have a common circular edge H, located at the intersection of the plane 17 and a fictitious cylinder whose axis coincides with the axis 11 of the circular lamp 1 and whose diameter equals the diameter the circular geometric axis passing through the point O of the circular lamp 1. These two facets are also inclined symmetrically with respect to said cylinder.
  • the tapered annular facet D-C is connected to a horizontal annular facet C-B, located in the plan 7 of the circular lamp 1. This is extended by a conical surface B-A whose top is on the axis 11 of the circular lamp 1.
  • the top A of the conical surface AB is located on the axis of revolution 11 of the circular lamp 1. It is the summit of a right cone whose axis merges with the axis of revolution of the circular lamp 1 and form with the edge AB an angle such that the ray reflected by the inclined plane AB, at the top A, crosses the axis of 11 revolution of the circular lamp and form with this one the target angle X.
  • the circular edge B is located on the plane 7 of the circular lamp 1.
  • the circular edge C is also located on the plan 7 of the circular lamp 1.
  • the frustoconical annular surface C-D forms an angle 135 degrees with plane 17 of the reflector and its edge circular D is located on the plane 17 of the reflector, in the disc space 26.
  • the ray reflected by the facet C-D at the edge D is tangent to the inner part of tube 1 and is parallel to the edge 18 of the target angle X.
  • the edge F is located on the plane 17 of the reflector, in the discoidal space 26, and the ray reflected on the edge F of the horizontal facet F-G deviates from the tube 1 parallel to the edge 19 of the target angle.
  • the edge G is located on the plane 17 of the reflector and the ray reflected by the facet F-G on the edge G is tangent to the inner part of tube 1 and returned inside the target angle X.
  • the edge I is located on the plane 17 of the reflector and is symmetrical with the edge G with respect to the edge H.
  • the edge J is located on the plane 17 of the reflector and is symmetrical with the edge F with respect to the edge H.
  • the edge K is located on the plane 17 of the reflector, at its outer limit.
  • Zones between two consecutive points, can be classified into three categories: those of which flatness should not be modified (zones 1), those whose flatness must be modified by giving priority the result to be obtained (zones 2) and those whose flatness must be modified by being able to give the priority to a choice of realization while respecting the result to be obtained (zones 3)
  • the edges A and B determine a zone 1.
  • Edges B and C determine a zone 1.
  • Edges C and D determine a zone 1.
  • Edges D and F determine zone 2 or 3.
  • Edges F and G determine a zone 1.
  • the edges G and H determine an area 2.
  • Edges H and I determine an area 2.
  • Edges I and J determine a zone 1.
  • the edges J and K determine a zone 3.
  • Type 1 zones are fully defined.
  • the type 2 zone determined by the edges G and H is a zone of inter-reflections whose plane G-H must split into two planes G-y and y-H that replace it.
  • the angle in H of the triangle GHy is defined so that that the ray reflected by the inclined plane H-y in the immediate vicinity of the H point is tangent to the inside the tube. At the point y of the triangle GHy, the radius reflected by the inclined plane H-y goes through G.
  • the type 2 zone determined by the edges H and I is a zone of inter-reflections whose plane H-I must split into two planes H-z and z-I that replace it.
  • the angle in H of the triangle IHz is defined so that that the ray reflected by the inclined plane H-z in the immediate vicinity of the H point is tangent to the outside of the tube. At point z of the triangle IHz, the radius reflected by the inclined plane H-z passes through I.
  • Type 3 zone determined by J and K edges leaves the reflector designer a wide range of opportunities to achieve the goal. Indeed, nothing imposes to correct at one time the angle attacking the incident ray and the overall objective can to be achieved by a succession of corrections partial ones of smaller amplitude via a sequence of smaller areas. In a non-exhaustive way, dimensions of the luminaire, its foreseeable applications, the material used for the realization of the reflector or any objective or subjective element deemed useful may influence the number of areas that will be retained.
  • the chosen amplitude determines the distance between the edge a and the plane of the reflector.
  • the conical surface Oa passes through J.
  • the position of the edge K1 is defined so that the radius reflected by the inclined facet aK 1 on the circular edge K 1 is parallel to the edge 18 of the target angle X.
  • the circular edge K 1 which is substituted for the circular edge J allows via the axis Ob to define K 2 , then K 3 and so on until K n (not shown) which must be confused with the circular end K of the reflector.
  • the area determined by the edges D and F can be treated in two ways: zone 2 if the correction can or must be done once or zone 3 if the corrections can or must be multiplied for in decrease the amplitude.
  • the zone DF of the reflector 2 is treated as a zone of the type 3.
  • the disk 17 is dug with grooves. forming inclined annular facets Fp, pE 1 , E 1 -q, qE 2 , E 2 -r, rE 3 , E 3 -s and sD.
  • the chosen amplitude determines the distance between the edge p and the plane 17 of the reflector.
  • the conical surface Op passes through F.
  • the position of the edge E1 is defined so that the radius reflected by the inclined facet pE 1 on the circular edge E 1 is parallel to the edge 19 of the target angle X.
  • the circular edge E1 which replaces the circular edge F, allows via the axis Oq to define E 2 , then E3 and so on. up to En (not shown) which must be confused with the circular edge D.
  • a series of small areas is thus produced, the sum of the lengths of which must correspond to the distance DF (known) and whose amplitude or amplitudes must make it possible to respect the target (known) angle.
  • the resolution of a series of mathematical equations within the reach of those skilled in the art, makes it possible to determine the optimum number of these small areas and the optimum amplitudes and to define precisely the modifications to be made to the flatness of this area. part of the technical reflector.
  • Addendum Tube Tubular fluorescent lamp rectilinear with two bases.
  • Technical luminaire Luminaire comprising at least one tube placed in front of a reflector or partially surrounded by it.
  • Compact tube Single-ended tube obtained by folding one or more times a tube on itself.
  • Technical reflector Reflector which, associated with the circular lamp , is the object of the invention and is intended to reflect to a useful area to illuminate the incident light rays emitted by the circular lamp and reaching it.
  • Useful area Surface considered flat, which is arranged opposite the circular lamp, perpendicular to its axis of revolution.
  • Incidental ray Straight ray of light supposed to come from the circular axis of the circular lamp.
  • Reflector plane A common plane in which each annular facet of the technical reflector comprises at least one circular edge.
  • Facet inclined Frustoconical annular facet of the technical reflector which is inclined relative to the plane of the reflector.
  • Flat facet Annular facet of the technical reflector which is located in the plane of the reflector or in a plane parallel thereto.
  • Target angle Angle defined by the ridge (or apothema) and the axis (or height) of the cone of revolution whose vertex is on the axis of revolution of the circular lamp, in the center of the plane of the lamp and whose base is confuses with the useful area to illuminate.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
EP03024290A 2003-10-23 2003-10-23 Reflektor für eine ringförmige Leuchtstofflampe Expired - Lifetime EP1526329B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT03024290T ATE338247T1 (de) 2003-10-23 2003-10-23 Reflektor für eine ringförmige leuchtstofflampe
DE60308030T DE60308030D1 (de) 2003-10-23 2003-10-23 Reflektor für eine ringförmige Leuchtstofflampe
EP03024290A EP1526329B1 (de) 2003-10-23 2003-10-23 Reflektor für eine ringförmige Leuchtstofflampe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03024290A EP1526329B1 (de) 2003-10-23 2003-10-23 Reflektor für eine ringförmige Leuchtstofflampe

Publications (2)

Publication Number Publication Date
EP1526329A1 true EP1526329A1 (de) 2005-04-27
EP1526329B1 EP1526329B1 (de) 2006-08-30

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EP03024290A Expired - Lifetime EP1526329B1 (de) 2003-10-23 2003-10-23 Reflektor für eine ringförmige Leuchtstofflampe

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EP (1) EP1526329B1 (de)
AT (1) ATE338247T1 (de)
DE (1) DE60308030D1 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2415635A (en) * 1944-05-26 1947-02-11 Eastman Kodak Co Illumination arrangement for photographic enlargers
FR1141825A (fr) * 1956-02-28 1957-09-09 Réflecteur torique multicourbe à équations coniques différentielles
DE2615446A1 (de) * 1976-04-09 1977-10-20 Zimmermann Kg Rudolf Stufenspiegel
US4280167A (en) * 1979-09-13 1981-07-21 Ellett Edwin W Operating room surgical lamp
US5062030A (en) * 1990-12-10 1991-10-29 Figueroa Luisito A Customized light reflector
US5832362A (en) * 1997-02-13 1998-11-03 The Procter & Gamble Company Apparatus for generating parallel radiation for curing photosensitive resin
EP1152187A2 (de) * 2000-05-02 2001-11-07 C.R.F. Società Consortile per Azioni Beleuchtungseinrichtung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2415635A (en) * 1944-05-26 1947-02-11 Eastman Kodak Co Illumination arrangement for photographic enlargers
FR1141825A (fr) * 1956-02-28 1957-09-09 Réflecteur torique multicourbe à équations coniques différentielles
DE2615446A1 (de) * 1976-04-09 1977-10-20 Zimmermann Kg Rudolf Stufenspiegel
US4280167A (en) * 1979-09-13 1981-07-21 Ellett Edwin W Operating room surgical lamp
US5062030A (en) * 1990-12-10 1991-10-29 Figueroa Luisito A Customized light reflector
US5832362A (en) * 1997-02-13 1998-11-03 The Procter & Gamble Company Apparatus for generating parallel radiation for curing photosensitive resin
EP1152187A2 (de) * 2000-05-02 2001-11-07 C.R.F. Società Consortile per Azioni Beleuchtungseinrichtung

Also Published As

Publication number Publication date
DE60308030D1 (de) 2006-10-12
EP1526329B1 (de) 2006-08-30
ATE338247T1 (de) 2006-09-15

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