EP2796778A1 - Système d'éclairage - Google Patents

Système d'éclairage Download PDF

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Publication number
EP2796778A1
EP2796778A1 EP13165557.3A EP13165557A EP2796778A1 EP 2796778 A1 EP2796778 A1 EP 2796778A1 EP 13165557 A EP13165557 A EP 13165557A EP 2796778 A1 EP2796778 A1 EP 2796778A1
Authority
EP
European Patent Office
Prior art keywords
optical element
optical
light source
optical elements
lighting system
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
Application number
EP13165557.3A
Other languages
German (de)
English (en)
Other versions
EP2796778B1 (fr
Inventor
Antti Mäkiranta
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.)
Hella GmbH and Co KGaA
Original Assignee
Hella KGaA Huek and Co
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 Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Priority to EP13165557.3A priority Critical patent/EP2796778B1/fr
Priority to PCT/EP2014/056786 priority patent/WO2014173656A1/fr
Publication of EP2796778A1 publication Critical patent/EP2796778A1/fr
Application granted granted Critical
Publication of EP2796778B1 publication Critical patent/EP2796778B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
    • 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
    • F21V21/14—Adjustable mountings
    • F21V21/22—Adjustable mountings telescopic
    • 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
    • F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • 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
    • F21V5/008—Combination of two or more successive refractors along an optical axis
    • 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
    • F21V7/048—Optical design with facets structure
    • 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
    • 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
    • F21V7/07—Optical design with hyperbolic curvature
    • 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
    • F21V7/08—Optical design with elliptical curvature
    • 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
    • F21V7/09—Optical design with a combination of different curvatures

Definitions

  • the present patent application relates to a lighting system comprising a light source, at least one first optical element which is designed to receive light from the light source, at least one second optical element with the second optical element being movably arranged with respect to the first optical element between an interference position and a rest position wherein the second optical element receives light from the light source within the interference position and the first optical element receives light from the light source with the second optical element being in its rest position.
  • High power light sources such as light emitting diodes are used in many applications. Some of these applications such as flash lights, spot lights or adjustable light systems call for the ability to focus or change the size of a projected light spot.
  • One commonly used lighting system with focusing features utilizes a single reflector as an optical element. The reflector can be moved with respect to the light source in order to focus or to change the size of the light spot.
  • a lighting system with two reflectors and a light source is known from the US patent 8,118,451 B2 .
  • An inner reflector which is in a fixed position to the light source is held moveably with respect to an outer reflector.
  • the light emitted by the light source is either received by the inner reflector solely or it is received by both the inner reflector and the outer reflector.
  • the lighting system provides a narrow beam if both the inner reflector and the outer reflector receive the light emitted by the light source.
  • a wide beam is provided if the light emitted by the light source is only received by the inner reflector.
  • the problem to be solved in this invention is to realize a small size lighting system with focusing features and to reduce the moving distance of moveable optical elements of the lighting system.
  • the invention is characterized in that the first optical element is in a fixed position to the light source and that the second optical element is arranged between the light source and the first optical element.
  • a small size lighting system is provided with two optical elements being moveably arranged to each other.
  • the first optical element and the light source of the lighting system are in fixed position to each other and a moveable second optical element is arranged between the first optical element and the light source.
  • the second optical element is moveable between an interference position and a rest position. If the second optical element is in its interference position it receives light from the light source.
  • the invention allows changing an optical strategy of the lighting system by small movements of the second optical element. With this invention it is possible to realize an optical zoom for spot lights, flash lights or the like. As the focusing feature is realized at low costs it enables low price products. In addition the focusing feature is highly variable as the second optical element can be moved to various intermediate positions with each intermediate position allowing a different optical strategy by the same product. This reduces product variety in the production and allows the use of the same product for several applications.
  • the second optical element can be arranged in at least one intermediate position between the rest position and interference position. In the intermediate position of the second optical element light emitted by the light source can be received by both the first optical element and the second optical element.
  • the first optical element may also receive light from the second optical if the second optical element is designed as a light guide which transmits at least a part of the light received by the light source.
  • a majority of first optical elements and a majority of second optical elements is provided with the first optical elements and/or the second optical elements being arranged in a step like arrangement wherein the radial dimensions or the diameter of the first optical elements and/or of the second optical elements increases with increasing axial distance between the light source and the several optical elements.
  • the light emitted by the light source can be received by the majority of optical elements.
  • Each optical element can have an individual optical characteristic in order to realize a desired and variable beam characteristic of the lighting system. For example a spreading angle of the majority of the first optical elements can spread between -/+ 4° while the spreading angle of the second optical elements spreads between -/+ 35°.
  • the spreading angle of the first optical elements can smoothly increase from +/- 5° to +/- 12.5° while the spreading angle of the second optical elements smoothly decreases from +/-35° to +/-15°. This allows a smooth transition between different light strategies realized by the lighting system.
  • the first optical elements and the second optical elements of the lighting system can be built as reflector type optical elements or as refracting optical elements.
  • a surface of the optical elements can be formed as a free form surface which allows a very individual and sophisticated optical strategy.
  • the surface may provide a majority of segments with each segment having its own spreading angle or with each segment being formed as a free form surface.
  • an optical characteristic of the at least one second optical element is adjusted to an optical characteristic of the at least one first optical element in such a way that a beam with a first characteristic is formed with the second optical element being in the rest position and a beam with a second characteristic is formed with second optical element being in the interference position.
  • the lighting systems may provide a wide beam and a large-scale light spot with the at least one second optical element being in its rest position, while the same lighting system may provide a narrow beam and a small-size light spot with the at least one second optical element being in its interference position.
  • the beam characteristic of the lighting system can be changed from narrow to wide.
  • All intermediate positions of the moveable second optical element can provide a beam characteristic between the wide beam and the narrow beam.
  • the optical characteristic of the first optical element may be affected by a first spreading angle while the optical characteristic of the second optical element may be affected by a second spreading angle.
  • the surfaces of the optical elements have different optical properties.
  • the surface of the first optical element may form a cold mirror designed for reflecting the entire visible light spectrum and allowing infrared light to pass while the surface of the second optical element might be designed as a hot mirror reflecting infrared light and allowing visible light to pass.
  • the different optical properties of the surfaces may allow for a change of the light colour.
  • the majority of first optical elements and the majority of second optical elements are comprised with each second optical element being positioned between two first optical elements or between one first optical element and the light source.
  • the lighting system can be built advantageously small and small moving distances for the second optical elements can be provided with the second optical elements being positioned between two first optical elements or one second optical element and the light source.
  • a gap is built between two adjacent first optical elements.
  • a second optical element which is arranged between the two adjacent first optical elements passes through the gap when being moved from the rest position to the interference position and reverse.
  • the second optical element can be located behind one of the two adjacent first optical elements in its rest position and it can be located in front of the second adjacent first optical element in its interference position. Light emitted from the light source can therefore directly be received by the first optical elements if the second optical elements are in its rest position while the second optical elements received light emitted by the light source in its interference position.
  • the second optical element is built as a refracting element the light received by the second optical elements first can pass through the second optical element and can be transmitted to the first optical elements. If the second optical elements are built as reflector type optical elements the light received by the second optical elements in its interference position is not received by the first optical elements located behind the second optical elements.
  • Figures 1 and 2 show a reflector type lighting system with a majority of first optical elements 1 and a majority of second optical elements 2 forming the reflector 9 of the lighting system.
  • the optical elements 1, 2 are built as rotationally symmetric optical elements. All optical elements 1, 2 are in a coaxial arrangement with respect to an optical axle 3 of the lighting system.
  • a surface 7 of the first optical elements 1 and a surface 8 of the second optical elements 2 define a parabolic surface section of the reflector 9 with a high power light source 4 being arranged in the origin of the parabolic reflector surfaces 7, 8.
  • the second optical elements 2 are moveable arranged with respect to the first optical elements 1 and the light source 4.
  • the moveable arrangement of the second optical elements 2 allows the lighting system to be used as a spot light or flash light with focusing feature.
  • Figures 3 and 4 show the second optical elements 2 in the rest position and the interference position respectively.
  • the optical elements 1, 2 are in a step like arrangement with increasing axial distance and constant radial distance between adjacent first optical elements 1.
  • the moving distance 6 of the second optical element 2 is very small compared to the height of the reflector 9. E.g. the moving distance 6 is less than one tenth of the axial height 10 of the reflector 9.
  • the second optical element 2 is allocated to a gap 5 built between two adjacent first optical elements 1.
  • the spacing of the first optical elements 1 and the second optical elements 2 in both axial and radial direction is directly linked to the size and position of the reflecting surfaces 7, 8 of the optical element 1, 2.
  • Light emitted by the light source 4 is completely received by the first optical elements 1 with the second optical elements 2 being in the rest position while the light is completely received by the second optical elements 2 if these are in the interference position.
  • the second optical elements 2 are located in the gaps 5 between two first optical elements 1 or between the light source 4 and the first optical element 1 which is nearest to the light source 4 in the rest position.
  • the first second optical element 2 are located behind the first optical element 1 with the first optical element 1 being located between the light source 4 and the second optical element 2.
  • Light emitted by the light source 4 does not receive the reflecting surface 8 of the second optical element 2 but only the reflecting surface 7 of the allocated first optical element 1.
  • the second optical element 2 is located in front of the first optical element 1. Light emitted by the light source 4 is received by the second optical element 2 while the first optical element 1 located behind the second optical element 2 does not receive light.
  • the lighting system depending on the position of the second optical element 2.
  • the second optical element 2 With the second optical element 2 being in its interference position a narrow beam is formed and a small projected light spot is provided. If the second optical element 2 is in its rest position the light emitted by the light source 4 is received by the first optical element 1 and a wide beam is formed.
  • the second optical element 2 If the second optical element 2 is in an intermediate position between the rest position and the interference position both the first optical element 1 and the second optical element 2 receive light from the light source 4.
  • the projected light spot has an intermediate size and therefore the optical strategy can be varied in a large scale and the lighting system can be used for several different lighting tasks.
  • the second optical elements 2 can be moved individually or all at the same time. The individual movement of the second optical elements 2 allows additional optical strategies.
  • the ratio of the moving distance 6 and the axial height 10 is within the range of 0.01 to 0.4.
  • the light source 4 is in a fixed position with respect to the at least one first optical element 1.
  • the at least one second optical element 2 is a position between the light source 4 and the at least one first optical element 1.
  • the moving distance 6 decreases with the number of moveable optical elements 2 increasing. The moving distance 6 increases if only a single second optical element 2 or a few second optical elements 2 are provided.
  • the moving distance 6 of the second optical elements 2 can vary.
  • the second optical element 2 which is located next to the light source 4 may have the smallest moving distance 6 while the moving distance 6 increases for optical elements 2 which have a larger distance to the light source 4.
  • each second optical element 2 can have an individual moving distance 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP13165557.3A 2013-04-26 2013-04-26 Système d'éclairage Not-in-force EP2796778B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13165557.3A EP2796778B1 (fr) 2013-04-26 2013-04-26 Système d'éclairage
PCT/EP2014/056786 WO2014173656A1 (fr) 2013-04-26 2014-04-04 Système d'éclairage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13165557.3A EP2796778B1 (fr) 2013-04-26 2013-04-26 Système d'éclairage

Publications (2)

Publication Number Publication Date
EP2796778A1 true EP2796778A1 (fr) 2014-10-29
EP2796778B1 EP2796778B1 (fr) 2017-02-01

Family

ID=48190774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13165557.3A Not-in-force EP2796778B1 (fr) 2013-04-26 2013-04-26 Système d'éclairage

Country Status (2)

Country Link
EP (1) EP2796778B1 (fr)
WO (1) WO2014173656A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3495724A1 (fr) * 2017-12-07 2019-06-12 Tons Lightology Inc. Module de lampe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0974786A2 (fr) * 1998-07-18 2000-01-26 Volkswagen Aktiengesellschaft Phare du type projecteur pour véhicules
EP1452797A1 (fr) * 2003-02-25 2004-09-01 CATEYE Co., Ltd. Appareil d'éclaireage
US8118451B2 (en) 2008-03-13 2012-02-21 Fraen Corporation Reflective variable spot size lighting devices and systems
EP2428727A1 (fr) * 2010-08-25 2012-03-14 Jordan Reflektoren GmbH & Co.KG Réflecteur à lampes et son dispositif de fabrication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0974786A2 (fr) * 1998-07-18 2000-01-26 Volkswagen Aktiengesellschaft Phare du type projecteur pour véhicules
EP1452797A1 (fr) * 2003-02-25 2004-09-01 CATEYE Co., Ltd. Appareil d'éclaireage
US8118451B2 (en) 2008-03-13 2012-02-21 Fraen Corporation Reflective variable spot size lighting devices and systems
EP2428727A1 (fr) * 2010-08-25 2012-03-14 Jordan Reflektoren GmbH & Co.KG Réflecteur à lampes et son dispositif de fabrication

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3495724A1 (fr) * 2017-12-07 2019-06-12 Tons Lightology Inc. Module de lampe

Also Published As

Publication number Publication date
WO2014173656A1 (fr) 2014-10-30
EP2796778B1 (fr) 2017-02-01

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