EP0008006B1 - Appareil d'éclairage intérieur - Google Patents

Appareil d'éclairage intérieur Download PDF

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Publication number
EP0008006B1
EP0008006B1 EP19790102357 EP79102357A EP0008006B1 EP 0008006 B1 EP0008006 B1 EP 0008006B1 EP 19790102357 EP19790102357 EP 19790102357 EP 79102357 A EP79102357 A EP 79102357A EP 0008006 B1 EP0008006 B1 EP 0008006B1
Authority
EP
European Patent Office
Prior art keywords
reflector
reflectors
lamp
fluorescent lamp
angle
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
Application number
EP19790102357
Other languages
German (de)
English (en)
Other versions
EP0008006A1 (fr
Inventor
Reiner Dr. Pusch
Heinz-Dieter Fritz
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.)
Siemens AG
Original Assignee
Siemens AG
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
Priority claimed from DE19782834285 external-priority patent/DE2834285C2/de
Priority claimed from DE19792923591 external-priority patent/DE2923591A1/de
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT79102357T priority Critical patent/ATE658T1/de
Publication of EP0008006A1 publication Critical patent/EP0008006A1/fr
Application granted granted Critical
Publication of EP0008006B1 publication Critical patent/EP0008006B1/fr
Expired legal-status Critical Current

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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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/06—Optical design with parabolic curvature

Definitions

  • the invention relates to an interior lamp with a symmetrical, wide-angle channel mirror for a fluorescent lamp, which is arranged in the plane of symmetry of the channel mirror, with two parabolic side mirrors, the main radiation of which crosses the plane of symmetry, and with two roof mirrors, the radiation of which lies mainly on the same side of the plane of symmetry as the assigned roof mirror, the edge edges of the roof mirror and the upper edge edges of the side mirror lying above the lower horizontal tangential plane on the fluorescent lamp.
  • the invention is based, without using an additional anti-glare mirror and without a prismatic plate or prismatic strip, to significantly improve the characteristic sizes of such an interior light: in particular, the maximum light intensity should be as close as possible to the glare limit angle, and the ratio of the maximum light intensity to that below 0 ° at least 2 and the efficiency is at least 70%:
  • the importance of the glare limit angle lies in the fact that above this angle measured against the vertical no direct light of the lamp emerges from the interior light.
  • the inventive solution to this problem is characterized in an interior lamp of the type mentioned in that the main axis of each side mirror with the vertical forms an angle between 30 ° and 45 °, in particular that of 40 °, that the focal length of the side mirror is given by the Quotients from half the diameter of the fluorescent lamp and the sine of the scattering angle, which is between 7 ° and 18 °, that the roof mirrors each have the shape of a parabola, the main axis of which is at an angle between 25 ° and 45 °, in particular 30 °, with the vertical , includes that the outer edge of each roof mirror lies on a center beam of the fluorescent lamp which is directed to such a boundary point of the adjacent side mirror from which it is reflected past the lamp that the focal length of the parabola of the roof mirror is chosen such that at least 80 % of the center rays of the Leu reflected by a roof mirror past the lamp Exit the fluorescent lamp without further reflection from the interior light, and that the focal points of the parabolas of the roof and
  • the salient properties of the interior lamp according to the invention are based on the fact that the upward radiation of the lamp, which is no longer detected by the side mirrors, is deflected largely without loss through the roof mirror into the main emission zone, and on the optimization of several parameters.
  • the smallest possible light scattering plays an important role:
  • the focal points of the parabolas of side and roof mirrors were placed in the center of the lamp and the dimensions of the channel mirror were chosen to be very large in relation to the lamp diameter.
  • the mirrors are arranged in such a way that the center beam just passing the edge of a roof mirror and reflected by the side mirror in the limit point can leave the lamp unhindered by a lamp or by further reflections.
  • the required glare limit angle above which no direct light can emerge from the luminaire determines the position of the lower edge of each side mirror: it lies on the tangent to the lamp with this glare limit angle.
  • the side mirrors extend at least up to these border tangents.
  • each roof mirror preferably lies - by appropriate dimensioning of its focal length - also on the parallel to its main axis which runs through the lower edge of the side mirror adjacent to this roof mirror: in this case, 100% of the center rays passing by the lamp and reflected by the roof mirror pass the lamp without further reflection through a side mirror from the lamp.
  • the limit point is one
  • the side mirror lies on the boundary tangent to the fluorescent lamp which runs through the lower edge of the opposite side mirror and the side mirrors have such a focal length that each boundary tangent at the boundary point is perpendicular to the tangent to the parabola of the side mirror.
  • the light cone lying below the connecting line from the center of the lamp to the boundary point of a side mirror and directed to the boundary point of the side mirror is just completely reflected past the lamp, so that even a high proportion of the scattered light can leave the lamp unhindered.
  • the interior light shown in cross section has a channel mirror formed symmetrically to the plane of symmetry E with two mirror images of the same side mirror 1, 1 'and two mirror images of the same roof mirror 2, 2', each of which is parabolic.
  • the main axes H1, H1 'of the side mirror 1, 1' each intersect at the center M of the fluorescent lamp 3 and have an angle ⁇ of 40 ° to the vertical.
  • the lower marginal edges 12, 12 'of the side mirrors lie on boundary tangents T, T' on the fluorescent lamp 3, the inclination of which towards the vertical is predetermined by the required glare boundary angle 8; here it is 55 ° and means that no direct light from the lamp emerges from the lamp above.
  • this limit point can - as shown here - also be the upper edge. The latter can also be above this limit point.
  • the focal length of the parabolas of the side mirrors, whose focal points F1 lie in the center M of the fluorescent lamp 3, depends on the diameter D of the lamp and, in the interest of a sufficiently small scatter, is equal to the quotient of half the diameter D of the lamp 3 and the sine of the Scattering angle • ⁇ between the main axis H1 'and a tangent to the lamp 3 running through the apex S1'; this angle is 12 °.
  • the boundary tangent at the boundary point 11, 11 ' is then perpendicular to the tangent to the' parabola at this point, and the width of the light exit opening between the lower edge edges 12, 12 'is 280 mm.
  • the main axes H2, H2 'of the roof mirrors 2, 2' also intersect at the center M of the lamp 3 and form an angle -y of 30 ° with the plane of symmetry E; in contrast to the side mirrors, however, the main radiation direction of each roof mirror lies on that side of the plane of symmetry E on which this roof mirror is located.
  • the edge edges 21, 21 'of the roof mirror lie on the connecting lines V, V' between the center M of the lamp 3 and the boundary points 11, 11 'of the side mirror.
  • the section 4, 4 'lying between the boundary points 11, 11' of the side mirrors 1, 1 'and the edge edges 21, 21' of the roof mirror is not very visually active since it only receives some scattered light; it can therefore be omitted in whole or in part or, for example, serve as a slot for the exhaust air duct. Accordingly, the side reflectors can also extend somewhat beyond the boundary points 11, 11 'and the sections 4, 4' correspondingly somewhat steeper than shown.
  • sections 4, 4 'can also consist of reflective material, the greatest effectiveness resulting from the length shown in the figure.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)

Claims (3)

1. Lampe d'intérieur à miroir en goulotte pour un tube fluorescent disposée dans le plan de symétrie du miroir en goulotte, du type comportant deux miroirs latéraux de forme parabolique dont les rayonnements principaux respectifs croisent le plan de symétrie, ainsi que deux miroirs en toit dont le rayonnement se situe principalement du même côté du plan de symétrie que le miroir en toit correspondant, les bords des miroirs en toit et les bords supérieurs des miroirs latéraux se situant au-dessus du plan horizontal inférieur tangent à la lampe fluorescente, caractérisée par le fait que l'axe principal (H1, H1') de chaque miroir latéral (1, 1') forme avec la perpendiculaire (E) un angle (β) compris entre 30° et 45°, de préférence un angle de 40°, que la distance focale des miroirs latéraux (1, 1') est donnée par le quotient entre le demi-diamètre (D) de la lampe fluorescente (3) et le sinus de l'angle de dispersion compris entre 7° et 18°, que les miroirs en toit (2, 2') ont chacun la forme d'une parabole dont l'axe principal forme avec la verticale (E) un angle compris entre 25° et 45°, de préférence un angle de 30°, que le bord extérieur (21, 21') de chacun des miroirs en toit (2, 2') se situe sur un rayon central de la lampe, fluorescente (3), dirigé sur un point limite (11, 11') du miroir latéral voisin et par lequel il est réfléchi de manière à passer devant la lampe, que la distance focale (S2, S2') de la parabole des miroirs en toit (2, 2') est choisie de telle manière qu'au moins 80 % des rayons centraux de la lampe fluorescente (3) qui sont réfléchis par un miroir en toit (2, 2') de manière à passer devant la lampe, sortent, sans autre réflexion de la lampe d'intérieur et que les foyers (F1, F2) des paraboles des miroirs en toit et des miroirs latéraux (1, 1', 2, 2',) coïncident avec le centre (M) de la lampe fluorescente (3).
2. Lampe d'intérieur selon la revendication 1, caractérisée par le fait que le bord extérieur (21, 21') de chaque miroir de toit (2, 2') a une dimension telle que son bord (21, 21') se situe sur celle des parallèles (P, P') à son axe principal (H2, H2') qui passe par le bord inférieur (12, 12') du miroir latéral (1), voisin de ce miroir en toit.
3. Lampe d'intérieur selon la revendication 1 ou 2, caractérisée par le fait que le point limite (11, 11") de chaque miroir latéral (1, 1') se situe sur la tangente limite (T, T') à la lampe fluorescente (3) qui passent par le bord inférieur (12, 12') du miroir latéral situé en face, et que chaque tangente limite au point limite (11, 11') est perpendiculaire à la tangente à la parabole du miroir latéral.
EP19790102357 1978-08-04 1979-07-09 Appareil d'éclairage intérieur Expired EP0008006B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79102357T ATE658T1 (de) 1978-08-04 1979-07-09 Innenleuchte.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19782834285 DE2834285C2 (de) 1978-08-04 1978-08-04 Rinnenförmige, nach unten offene Reflektoranordnung mit breitstrahlender, symmetrischer Lichtverteilungskurve
DE2834285 1978-08-04
DE2923591 1979-06-11
DE19792923591 DE2923591A1 (de) 1979-06-11 1979-06-11 Innenleuchte

Publications (2)

Publication Number Publication Date
EP0008006A1 EP0008006A1 (fr) 1980-02-20
EP0008006B1 true EP0008006B1 (fr) 1982-02-03

Family

ID=25775301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790102357 Expired EP0008006B1 (fr) 1978-08-04 1979-07-09 Appareil d'éclairage intérieur

Country Status (2)

Country Link
EP (1) EP0008006B1 (fr)
GR (1) GR72391B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2566819B1 (fr) * 1984-06-29 1986-08-29 Paralumes Durlumen Faux plafond constitue de lames
DE8613788U1 (de) * 1986-05-22 1986-07-31 Fa. Ing. Friedhelm Hirt, 5880 Lüdenscheid Leuchtstoffröhrenleuchte
IT1238880B (it) * 1990-02-16 1993-09-04 Targetti Sankey Spa Riflettore ottico a profilo misto per illuminazione.
AU679737C (en) * 1993-11-18 2001-11-08 Paul Andrew Cronk Adjustable reflector

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE217742C (fr) *
GB516012A (en) * 1938-06-17 1939-12-20 British Thomson Houston Co Ltd Improvements in or relating to lanterns for electric lamps

Also Published As

Publication number Publication date
EP0008006A1 (fr) 1980-02-20
GR72391B (fr) 1983-11-01

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