EP3354981A1 - A component of an optical system of an anti-glare lighting fixture - Google Patents

A component of an optical system of an anti-glare lighting fixture Download PDF

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Publication number
EP3354981A1
EP3354981A1 EP17460002.3A EP17460002A EP3354981A1 EP 3354981 A1 EP3354981 A1 EP 3354981A1 EP 17460002 A EP17460002 A EP 17460002A EP 3354981 A1 EP3354981 A1 EP 3354981A1
Authority
EP
European Patent Office
Prior art keywords
reflector
section
parabola
mounting
mounting springs
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Withdrawn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
EP17460002.3A
Other languages
German (de)
French (fr)
Inventor
Grzegorz Sobczak
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.)
Lira Sp ZOO
Original Assignee
Lira Sp ZOO
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 Lira Sp ZOO filed Critical Lira Sp ZOO
Priority to EP17460002.3A priority Critical patent/EP3354981A1/en
Publication of EP3354981A1 publication Critical patent/EP3354981A1/en
Withdrawn legal-status Critical Current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
    • F21V7/005—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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/002—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for interchangeability, i.e. component parts being especially adapted to be replaced by another part with the same or a different function
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
    • F21V17/164—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting the parts being subjected to bending, e.g. snap joints
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/02—Wall, ceiling, or floor bases; Fixing pendants or arms to the bases
    • F21V21/025—Elongated bases having a U-shaped cross section
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/08—Devices for easy attachment to any desired place, e.g. clip, clamp, magnet
    • F21V21/088—Clips; Clamps
    • 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
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F21V7/0033—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following
    • F21V7/0041—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following for avoiding direct view of the light source or to prevent dazzling
    • 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

  • the subject of the invention is a component of an optical system of a fixture for fluorescent light bars.
  • Patent description PL 175285 discloses a reflector with two main areas whose slant heights in the cross-section are shaped as circular sectors. The main areas in the central section are connected with a central protrusion.
  • the central protrusion forms a radial surface tangent to the main surfaces of the reflector.
  • the main surfaces of the reflector change their shape along external transitional radial surfaces into parabolic side walls.
  • the main areas are covered with longitudinal stripes shaped as obtuse triangles, whose longest sides that constitute the base of the stripes correspond to the slant heights of the main areas.
  • the width of the external radial transitional surfaces varies.
  • the main areas include in their longitudinal section slant heights in the form of circular sectors, and intersect via the radial transition with the parabolic front and rear wall thus forming an "M" shaped interpenetration edge.
  • Application PL 357289 discloses a lighting fixture reflector with at least one longitudinal lamp, wherein the longitudinal reflector extends along the longitudinal direction of the lamp, and there are provided several reflective partitions arranged at a distance from each other and transverse to the longitudinal direction of the lamp, and which - when viewed in the longitudinal direction - are equipped in the middle with a recess on the side of the lamp (lamps), wherein the recess of a partition includes a reflective central part that is generally flat and parallel to the exit aperture of the reflector.
  • Application PL 363229 discloses a reflector used in lighting fixtures for illuminating crops in glass and plastic sheet greenhouses.
  • the reflector has a contour in the shape of a prism open at the bottom, and its left and right top walls include vent openings, whereas the opening has a larger diameter and doubles as an opening for mounting.
  • the vent opening in the left top wall is covered with a cap which comprises a disc made of material, and which is removed during cutting the opening. This is applicable if the fixtures are not part of a ventilation system.
  • the reflector is equipped with auxiliary reflector mounted to the top wall on the inside of the reflector. This limits the versatility of such a reflector, as it is not suitable for use with fluorescent light bars.
  • the shape of the photometric body is formed by designing the reflector side walls and the parts that confine the reflector as curved in a parabolic shape. As the reflector is mounted to a fixture after mounting the lamp, the reflector must be equipped with a longitudinal opening in its top part to enable its installation to the fixture. Such a solution reduces the efficiency of the fixture due to the loss of some of the luminous flux of the fluorescent light bar, which is not reflected in the illuminated direction, but remains in the fixture and is absorbed as a result of numerous reflections within the fixture.
  • the invention relates to a component of an optical system of an anti-glare lighting fixture characterised in that it is equipped with an auxiliary reflector, whose cross-section has a shape similar to a section of a parabola with a vertex, wherein the auxiliary reflector is located on the main reflector, and the cross-section of the joined reflectors is similar to a parabola, wherein the auxiliary reflector is equipped with at least four primary mounting springs arranged symmetrically in pairs on its both sides, wherein the main reflector is also equipped with at least four secondary mounting springs arranged in the same manner as the primary mounting springs, wherein the primary and secondary mounting springs are located next to each other in shared mounting openings in the walls of profiles whose cross-section has a shape similar to the letter "L", and which are located on the bottom edge of the fixture.
  • the solution according to the invention enables the use of this flux by reflecting it in the illuminated direction via an auxiliary reflector in the shape of a sector of a parabola. This increases the luminosity by nearly 20%, which in turn lowers the amount of input energy required to provide the desired luminosity by up to more than a dozen percent, with no detriment to the anti-glare properties of the fixture.
  • Fig. 1 shows the cross-section of the invention
  • Fig. 2 auxiliary reflector together with mounting springs
  • Fig. 3 main reflector together with mounting springs and the attached auxiliary reflector
  • Fig. 4 shared mounting opening
  • fig. 5 reflector when the spring of the auxiliary reflector settles next to the spring of the main reflector
  • Fig. 6 cross-section of a lighting fixture with mounting openings
  • Fig. 7 lighting fixture with mounting openings.
  • the component of an optical system of an anti-glare lighting fixture for fluorescent light bars comprises the main reflector 3, whose side walls have a shape similar to the sectors of parabola arms.
  • the component of an optical system is equipped with an auxiliary reflector 1, whose cross-section has a shape similar to a section of a parabola with a vertex.
  • the auxiliary reflector 1 is located on the main reflector 3 and the cross-section of the joined reflectors is similar to a parabola.
  • the auxiliary reflector 1 is equipped with at least four primary mounting springs 2 arranged symmetrically in pairs on its both sides, wherein the main reflector 3 is also equipped with at least four secondary mounting springs 4 arranged in the same manner as the primary mounting springs 1.
  • the primary mounting springs 2 and secondary mounting springs 4 are located next to each other in shared mounting openings 5 in the walls of profiles 7 whose cross-section has a shape similar to the letter "L", and which are located on the bottom edge of the fixture 6.
  • the invention in the embodiment according to Fig. 1-7 is characterised in that the auxiliary reflector 1 in the shape of a parabola is mounted with mounting springs 2 located in the mounting opening 5 in the fixture 6 shared by this reflector 1 and the main reflector 3.
  • the shape of the curvature of the auxiliary reflector 1 corresponds to the shape of the curvature of the main reflector 3, and the mounting spring 2 of the auxiliary reflector 1 is located in the shared mounting opening 5 with the spring 4 of the main reflector 3, which pushes the main reflector 3 and the auxiliary reflector 1 against each other.
  • the auxiliary reflector 1 is installed by mounting the springs 2 of the auxiliary reflector 1 in mounting openings 5 made in the lighting fixture 6. Then, a fluorescent light and the main reflector 3 are installed by mounting the springs 4 in the mounting openings 5 made in the fixture 6.
  • the spring 4 mount prevents the main reflector 3 from extending out of the mounting opening 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)

Abstract

A component of an optical system of an anti-glare lighting fixture for fluorescent light bars comprising the main reflector (3), whose side walls have a shape similar to the sectors of parabola arms, equipped with an auxiliary reflector (1), whose cross-section has a shape similar to a section of a parabola with a vertex, wherein the auxiliary reflector (1) is located on the main reflector (3), and the cross-section of the joined reflectors is similar to a parabola, wherein the auxiliary reflector (1) is equipped with at least four primary mounting springs (2) arranged symmetrically in pairs on its both sides, wherein the main reflector (3) is also equipped with at least four secondary mounting springs (4) arranged in the same manner as the primary mounting springs (1), wherein the primary (2) and secondary (4) mounting springs are located next to each other in shared mounting openings (5) in the walls of profiles (7) whose cross-section has a shape similar to the letter "L", and which are located on the bottom edge of the fixture (6).

Description

  • The subject of the invention is a component of an optical system of a fixture for fluorescent light bars.
  • The prior art knows fixtures equipped with reflectors.
  • Patent description PL 175285 discloses a reflector with two main areas whose slant heights in the cross-section are shaped as circular sectors. The main areas in the central section are connected with a central protrusion.
  • The central protrusion forms a radial surface tangent to the main surfaces of the reflector. The main surfaces of the reflector change their shape along external transitional radial surfaces into parabolic side walls. The main areas are covered with longitudinal stripes shaped as obtuse triangles, whose longest sides that constitute the base of the stripes correspond to the slant heights of the main areas. The width of the external radial transitional surfaces varies. The main areas include in their longitudinal section slant heights in the form of circular sectors, and intersect via the radial transition with the parabolic front and rear wall thus forming an "M" shaped interpenetration edge.
  • Application PL 357289 discloses a lighting fixture reflector with at least one longitudinal lamp, wherein the longitudinal reflector extends along the longitudinal direction of the lamp, and there are provided several reflective partitions arranged at a distance from each other and transverse to the longitudinal direction of the lamp, and which - when viewed in the longitudinal direction - are equipped in the middle with a recess on the side of the lamp (lamps), wherein the recess of a partition includes a reflective central part that is generally flat and parallel to the exit aperture of the reflector.
  • Application PL 363229 discloses a reflector used in lighting fixtures for illuminating crops in glass and plastic sheet greenhouses. The reflector has a contour in the shape of a prism open at the bottom, and its left and right top walls include vent openings, whereas the opening has a larger diameter and doubles as an opening for mounting. In another embodiment of the reflector, the vent opening in the left top wall is covered with a cap which comprises a disc made of material, and which is removed during cutting the opening. This is applicable if the fixtures are not part of a ventilation system. The reflector is equipped with auxiliary reflector mounted to the top wall on the inside of the reflector. This limits the versatility of such a reflector, as it is not suitable for use with fluorescent light bars.
  • Additionally, in the anti-glare fixtures equipped with fluorescent light bars the shape of the photometric body is formed by designing the reflector side walls and the parts that confine the reflector as curved in a parabolic shape. As the reflector is mounted to a fixture after mounting the lamp, the reflector must be equipped with a longitudinal opening in its top part to enable its installation to the fixture. Such a solution reduces the efficiency of the fixture due to the loss of some of the luminous flux of the fluorescent light bar, which is not reflected in the illuminated direction, but remains in the fixture and is absorbed as a result of numerous reflections within the fixture.
  • The method of mounting a parabolic reflector in a lighting fixture for a fluorescent light bar using screws or rivets known in the prior art did not provide for the installation of an auxiliary reflector.
  • The invention relates to a component of an optical system of an anti-glare lighting fixture characterised in that it is equipped with an auxiliary reflector, whose cross-section has a shape similar to a section of a parabola with a vertex, wherein the auxiliary reflector is located on the main reflector, and the cross-section of the joined reflectors is similar to a parabola, wherein the auxiliary reflector is equipped with at least four primary mounting springs arranged symmetrically in pairs on its both sides, wherein the main reflector is also equipped with at least four secondary mounting springs arranged in the same manner as the primary mounting springs, wherein the primary and secondary mounting springs are located next to each other in shared mounting openings in the walls of profiles whose cross-section has a shape similar to the letter "L", and which are located on the bottom edge of the fixture.
  • The solution according to the invention enables the use of this flux by reflecting it in the illuminated direction via an auxiliary reflector in the shape of a sector of a parabola. This increases the luminosity by nearly 20%, which in turn lowers the amount of input energy required to provide the desired luminosity by up to more than a dozen percent, with no detriment to the anti-glare properties of the fixture.
  • The invention is shown as an embodiment in schematic figures, in which Fig. 1 shows the cross-section of the invention, Fig. 2 - auxiliary reflector together with mounting springs, Fig. 3 - main reflector together with mounting springs and the attached auxiliary reflector, Fig. 4 - shared mounting opening, fig. 5 - reflector when the spring of the auxiliary reflector settles next to the spring of the main reflector, Fig. 6 - cross-section of a lighting fixture with mounting openings, Fig. 7 - lighting fixture with mounting openings.
  • The component of an optical system of an anti-glare lighting fixture for fluorescent light bars comprises the main reflector 3, whose side walls have a shape similar to the sectors of parabola arms. The component of an optical system is equipped with an auxiliary reflector 1, whose cross-section has a shape similar to a section of a parabola with a vertex. The auxiliary reflector 1 is located on the main reflector 3 and the cross-section of the joined reflectors is similar to a parabola. The auxiliary reflector 1 is equipped with at least four primary mounting springs 2 arranged symmetrically in pairs on its both sides, wherein the main reflector 3 is also equipped with at least four secondary mounting springs 4 arranged in the same manner as the primary mounting springs 1. The primary mounting springs 2 and secondary mounting springs 4 are located next to each other in shared mounting openings 5 in the walls of profiles 7 whose cross-section has a shape similar to the letter "L", and which are located on the bottom edge of the fixture 6. The invention in the embodiment according to Fig. 1-7 is characterised in that the auxiliary reflector 1 in the shape of a parabola is mounted with mounting springs 2 located in the mounting opening 5 in the fixture 6 shared by this reflector 1 and the main reflector 3. The shape of the curvature of the auxiliary reflector 1 corresponds to the shape of the curvature of the main reflector 3, and the mounting spring 2 of the auxiliary reflector 1 is located in the shared mounting opening 5 with the spring 4 of the main reflector 3, which pushes the main reflector 3 and the auxiliary reflector 1 against each other. The auxiliary reflector 1 is installed by mounting the springs 2 of the auxiliary reflector 1 in mounting openings 5 made in the lighting fixture 6. Then, a fluorescent light and the main reflector 3 are installed by mounting the springs 4 in the mounting openings 5 made in the fixture 6. The spring 4 mount prevents the main reflector 3 from extending out of the mounting opening 5.

Claims (1)

  1. component of an optical system of an anti-glare lighting fixture for fluorescent light bars comprising the main reflector, whose side walls have a shape similar to the sectors of parabola arms characterised in that it is equipped with an auxiliary reflector (1), whose cross-section has a shape similar to a section of a parabola with a vertex, wherein the auxiliary reflector (1) is located on the main reflector (3), and the cross-section of the joined reflectors is similar to a parabola, wherein the auxiliary reflector (3) is equipped with at least four primary mounting springs (2) arranged symmetrically in pairs on its both sides, wherein the main reflector (3) is also equipped with at least four secondary mounting springs (4) arranged in the same manner as the primary mounting springs (1), wherein the primary (2) and secondary (4) mounting springs are located next to each other in shared mounting openings (5) in the walls of profiles (7) whose cross-section has a shape similar to the letter "L", and which are located on the bottom edge of the fixture (6).
EP17460002.3A 2017-01-31 2017-01-31 A component of an optical system of an anti-glare lighting fixture Withdrawn EP3354981A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17460002.3A EP3354981A1 (en) 2017-01-31 2017-01-31 A component of an optical system of an anti-glare lighting fixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17460002.3A EP3354981A1 (en) 2017-01-31 2017-01-31 A component of an optical system of an anti-glare lighting fixture

Publications (1)

Publication Number Publication Date
EP3354981A1 true EP3354981A1 (en) 2018-08-01

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EP17460002.3A Withdrawn EP3354981A1 (en) 2017-01-31 2017-01-31 A component of an optical system of an anti-glare lighting fixture

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB571042A (en) * 1944-03-22 1945-08-02 Gen Electric Co Ltd Improvements in or relating to reflector fittings for electric lamps
PL175285B1 (en) 1995-03-24 1998-12-31 Dabkowski Krzysztof Lighting fitting reflector especially for high-pressure discharge lamps
EP0952390A2 (en) * 1998-04-19 1999-10-27 TRILUX-LENZE GmbH & Co. KG Line illumination system
WO2000017574A1 (en) * 1998-09-21 2000-03-30 Hide-A-Lite Ab Light fitting
PL357289A1 (en) 2002-11-22 2004-05-31 Politechnika Warszawska Atmospheric air oxygen separator
PL363229A1 (en) 2003-10-31 2005-05-02 Zatra Sa Reflecting element
DE202011051094U1 (en) * 2011-08-25 2012-11-28 Zumtobel Lighting Gmbh Luminaire unit for a luminaire and luminaire
EP2913582A1 (en) * 2014-02-28 2015-09-02 Trilux GmbH & Co. KG Diffuser for a luminaire

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB571042A (en) * 1944-03-22 1945-08-02 Gen Electric Co Ltd Improvements in or relating to reflector fittings for electric lamps
PL175285B1 (en) 1995-03-24 1998-12-31 Dabkowski Krzysztof Lighting fitting reflector especially for high-pressure discharge lamps
EP0952390A2 (en) * 1998-04-19 1999-10-27 TRILUX-LENZE GmbH & Co. KG Line illumination system
WO2000017574A1 (en) * 1998-09-21 2000-03-30 Hide-A-Lite Ab Light fitting
PL357289A1 (en) 2002-11-22 2004-05-31 Politechnika Warszawska Atmospheric air oxygen separator
PL363229A1 (en) 2003-10-31 2005-05-02 Zatra Sa Reflecting element
DE202011051094U1 (en) * 2011-08-25 2012-11-28 Zumtobel Lighting Gmbh Luminaire unit for a luminaire and luminaire
EP2913582A1 (en) * 2014-02-28 2015-09-02 Trilux GmbH & Co. KG Diffuser for a luminaire

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