EP1610055B1 - Projecteur focalisable avec distribution de lumière disymétrique - Google Patents

Projecteur focalisable avec distribution de lumière disymétrique Download PDF

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Publication number
EP1610055B1
EP1610055B1 EP04014665.6A EP04014665A EP1610055B1 EP 1610055 B1 EP1610055 B1 EP 1610055B1 EP 04014665 A EP04014665 A EP 04014665A EP 1610055 B1 EP1610055 B1 EP 1610055B1
Authority
EP
European Patent Office
Prior art keywords
spotlight
optical axis
lens
main optical
front lens
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 - Fee Related
Application number
EP04014665.6A
Other languages
German (de)
English (en)
Other versions
EP1610055A1 (fr
Inventor
Dedo Weigert
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.)
Dedo Weigert Film GmbH
Original Assignee
Dedo Weigert Film GmbH
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 Dedo Weigert Film GmbH filed Critical Dedo Weigert Film GmbH
Priority to EP04014665.6A priority Critical patent/EP1610055B1/fr
Priority to CNA2005100788398A priority patent/CN1724924A/zh
Priority to US11/159,136 priority patent/US7347588B2/en
Publication of EP1610055A1 publication Critical patent/EP1610055A1/fr
Application granted granted Critical
Publication of EP1610055B1 publication Critical patent/EP1610055B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios

Definitions

  • the invention relates to a headlamp according to the preamble of claim 1.
  • From the DE-PS 386071 is a lens spotlight for stage use known.
  • This from the DE-PS 386071 known lens headlamp has a with respect to the main optical axis of the lens headlamp centrically arranged Frontlise.
  • the in the DE-PS 386071 described lens headlamp is folded its main optical axis and consists of three straight line pieces: a straight line from a light source to a first mirror, a straight line from the first mirror to a second mirror and a straight line from the second mirror to a lens.
  • the front lens of the prior art lens headlamp is centered, and for the evaluation of centricity, the section of the main optical axis which intersects the front lens of said lens headlamp is crucial.
  • the main optical axis of the lens headlamp coincides here with the main optical axis of the front lens.
  • Headlamps with variable beam angle are eg from the US 4,823,243 , of the EP 0 846 913 A1 , of the EP 1 020 681 A2 or the EP 1 215 437 A2 known.
  • the above-mentioned as examples headlights with variable angle aim in their technical design from the fact that in each beam angle position of the headlamp, the emitted light intensity is as uniform as possible.
  • a uniformly emitted light intensity is impractical.
  • the headlight is mounted higher than the object to be illuminated, with the upper edge of the object being only half as far away from the light source as the lower edge of the object in an extreme case. With such an arrangement, the light intensity at the top edge would be four times as high as at the far end.
  • asymmetric floodlights in which the light distribution is changed in the desired direction by an asymmetrical design of the reflector.
  • Such luminaires can then also be used as so-called foot ramps, in order, e.g. To illuminate backgrounds from below and also to direct the intensity through the asymmetric reflector mainly on the upper end of the background.
  • foot ramps in order, e.g. To illuminate backgrounds from below and also to direct the intensity through the asymmetric reflector mainly on the upper end of the background.
  • all of these known from the prior art asymmetric floodlights orcrestrampen are always called open-face lights without front lens. They are therefore not focusable.
  • half scrims are wire meshes that have different densities and reduce the light intensity by half or one aperture value (1 f-stop would then correspond to halving the intensity).
  • two such halved scrims can be used in front of each other to compensate for greater unevenness in the illumination of the object reasonably.
  • the far part of the object to be illuminated receives the full light intensity, while nearer parts of the object are artificially reduced in light intensity.
  • a stepless, uniform light intensity transition does not offer the halved scrims from the prior art.
  • the invention has for its object to provide a focusable headlamps with variable beam angle, with the targeted an asymmetrically radiating light intensity is generated.
  • a headlamp according to claim 1 This object is achieved by a headlamp according to claim 1.
  • the term "acentric arrangement of the front lens" in the sense of the present patent application is to be understood as follows: The front lens is oriented so that the optical Main axis of the front lens is parallel to the main optical axis of the headlamp, however, both mentioned main optical axes do not coincide (see also Fig. 1 ).
  • the above-mentioned object is also achieved by a headlamp according to claim 2.
  • the particular advantage of the headlamp according to the invention is that the specific asymmetry in the light distribution is combined with the focusability of the headlamp, which has extremely flexible applications even in relation to a single headlight result. If one takes, for example, the above-mentioned museum use and the replacement of the large picture against the small picture, so does not need to be replaced with an inventive headlight in this picture change. He only has to be focused on the new image size, ie its beam angle must be adapted to the new image size. However, the headlamp as such can remain in its previous spatial position and need not be replaced by a completely different headlamp.
  • the headlamp invention provides a continuous, uniform light intensity transition.
  • the entire intensity of the available light can be fully utilized.
  • smaller wattages can be used and the corresponding energy loss reduced. In all indoor applications, this also reduces heat build-up accordingly. This is a particular advantage, bearing in mind that indoors and in studios incandescent headlamps are still predominantly used, where the effectively usable light is only about 10% of the energy used.
  • the focusable light in film, television, theater and photographic applications is generally characterized by a relatively small radiating surface and is usually used from a distance, resulting in a fairly clear shadows.
  • This type of illumination is therefore generally supplemented by large-area lights.
  • surface lights In this field are increasingly used surface lights that work with fluorescent tubes. However, these are usually designed so that they are more likely to be used in the vicinity of the object to be illuminated. Since the camera works one-eyed, the camera lens can only capture the recorded subjects more or less two-dimensionally. The depth effect of a space that is natural in binocular vision is lost.
  • a focusable headlamp is used as a directed light usually at an angle of about 45 ° downwards radiating, where you can assume at the same time that the directional light is practically never used directly from the camera axis, but also at an angle, the side also can often be 45 °, with larger angle variants occur here, which can then be compensated by a rotatable orientation of the front lens, as provided in the embodiment of the headlamp according to the invention according to claim 2, substantially.
  • angle variants can be compensated by the displaceability of the acentric front lens according to the embodiment of the headlamp according to claim 3. In this embodiment of the headlamp according to the invention, it is possible to change the radial distance between the main optical axis of the front lens and the main optical axis of the headlamp.
  • the first embodiment of the invention illustrated headlight 1 has a housing 6.
  • a lamp 2 and a lamp 2 associated reflector 7 are arranged.
  • the main optical axis of the headlamp 1 is in Fig. 1 provided with the reference numeral 4.
  • the lamp 2 and the reflector 7 are movable in the headlight interior, so that the emission angle of the headlamp 1 can be changed.
  • the variability of the emission angle is known as such from the prior art and will not be explained here.
  • This in Fig. 1 illustrated embodiment of the headlamp 1 according to the invention further comprises a front lens 3.
  • This front lens 3 is an azentrisch arranged collecting lens whose main optical axis in Fig. 1 is provided with the reference numeral 5.
  • the main optical axis 5 of the front lens 3 extends parallel to the main optical axis 4 of the headlamp 1, but does not coincide with this.
  • the distance between the main optical axis 4 of the headlamp 1 and the main optical axis 5 of the front lens 3 is in Fig. 1 provided with the reference symbol A.
  • Fig. 2 shows a front view of the embodiment of the headlamp 1 of the invention Fig. 1 ,
  • the main optical axis 5 of the front lens 3 and the distance A to the main optical axis 4 of the headlamp 1 not shown.
  • Fig. 1 can be seen, you can see in Fig. 2 clearly that in the illustrated here first embodiment of the headlamp 1 according to the invention, the front lens 3 protrudes partially over the housing 6 of the headlamp 1.
  • the front lens 3 is mounted so that it can rotate around the optical main axis of the headlamp. This is in Fig. 2 indicated by the arrows.
  • the radial distance A of the main optical axis 5 of the front lens 3 from the main optical axis 4 of the headlight 1 However, in this embodiment of the headlight according to the invention always remains unchanged.
  • the front lens 3 of the embodiment of Fig. 1 is a very ordinary symmetrical condenser lens.
  • a converging lens is used as the front lens, which is designed to be cut out of a larger lens in such a way that the cut-out usable part of the front lens on one side is the normal edge of the original larger lens affected.
  • this type of front lens is designed to be cut out of a piece in the manner described from a larger lens
  • the local reference numeral 8 denotes an ordinary symmetrical condenser lens as a base lens or as an "imaginary" base lens.
  • This basic lens 8 has its central optical axis 9 for the purpose of various embodiments of inventive headlight is now a converging lens 3 'as a front lens of the headlamp, which is designed as if it had been cut out of the base lens 8 in a manner in which the cut out usable Part of the front lens 3 '- ie in Fig. 3 the front lens 3 'as such - on one side the normal edge of the base lens 8 is tangent.
  • FIG. 1 to 3 Embodiments of the invention have been shown with such front lenses 3, 3 ', which have a circular periphery.
  • the front lens has a non-circular periphery.
  • the front lens may have a substantially oval-like periphery.
  • An embodiment of such a front lens is in Fig. 4 shown and there is also provided with the reference numeral 3 ".
  • This exemplary embodiment of a front lens 3" is also based on these Fig. 3 known, ordinary symmetrical converging lens (base lens) 8 with its main optical axis 9 back.
  • the front lens 3 "from Fig. 4 is basically similarly cut out of the base lens, the ordinary symmetrical condenser lens 8, as the front lens 3 'of FIG Fig. 3 , Only the outer shape is slightly different.
  • Fig. 5 finally shows how the front lens 3 "of Fig. 4 is mounted on the headlight housing 6 and in this way leads to a further embodiment of the headlight according to the invention.
  • the front lens 3 "from Fig. 4 and 5 is rotatably mounted around the optical main axis of the headlamp. This is indicated by the curved arrow in Fig. 5 indicated.
  • the radial distance of the main optical axis of the front lens 3 "of the main optical axis of the headlamp is variable.
  • the invention is not limited to single focusable headlights. On the contrary, it also includes two-lens or generally multi-lens focusable headlamps in which one or more further lenses are arranged between the front lens and the lamp. Alone essential to the invention is the acentric arrangement of the front lens in a focusable headlight. How any existing additional lenses are designed or arranged in the headlight interior, which is immaterial to the present invention.
  • the invention is not limited to headlights of a certain power class.
  • headlamps according to the invention can be implemented both as miniature headlamps with a power of a few 10 watts and as high-power headlamps with a power of a few 10 kW.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (5)

  1. Projecteur focalisable (1) avec un angle d'émission variable pour un éclairage dans de studios de cinéma, de télévision ou de photographie ou pour un éclairage dans des musées ou pour un éclairage pour d'autres applications dans les domaines du cinéma, de la télévision, du théâtre ou de la photographie, avec
    - un boîtier (6),
    - une source de lumière (2) disposée à l'intérieur du projecteur et un réflecteur (7) disposé également à l'intérieur du projecteur, la source de lumière (2) et le réflecteur (7) étant mobiles à l'intérieur du projecteur,
    - un axe optique principal (4) du projecteur (1) représentant le centre du trajet du faisceau lumineux à l'intérieur du projecteur, et
    - une lentille convergente (3) à symétrie de rotation, fixée sur le côté frontal du boîtier (6), qui est la lentille frontale (3) du projecteur (1) et qui comprend un axe optique principal (5) de la lentille frontale (3), l'axe optique principal (5) de la lentille frontale (3) s'étendant exactement au centre de la lentille frontale (3),
    caractérisé en ce que
    la lentille frontale (3) est disposée de manière excentrée, de façon à ce que l'axe optique principal (4) du projecteur (1), représentant le centre du trajet du faisceau lumineux à l'intérieur du projecteur, tombe, au niveau de l'extrémité frontale du projecteur (1), sur la lentille frontale (3) de façon à ce que l'axe optique principal (4) du projecteur (1) soit parallèle à l'axe optique principal (5) de la lentille frontale (3), mais ne coïncide pas avec celui-ci.
  2. Projecteur focalisable (1) avec un angle d'émission variable pour un éclairage dans de studios de cinéma, de télévision ou de photographie ou pour un éclairage dans des musées ou pour un éclairage pour d'autres applications dans les domaines du cinéma, de la télévision, du théâtre ou de la photographie, avec
    - un boîtier (6),
    - une source de lumière (2) disposée à l'intérieur du projecteur et un réflecteur (7) disposé également à l'intérieur du projecteur, la source de lumière (2) et le réflecteur (7) étant mobiles à l'intérieur du projecteur,
    - un axe optique principal (4) du projecteur (1) représentant le centre du trajet du faisceau lumineux à l'intérieur du projecteur, et
    - une lentille convergente (3', 3") fixée sur le côté frontal du boîtier (6), qui est la lentille frontale (3', 3") du projecteur (1),
    caractérisé en ce que
    - ladite lentille frontale (3', 3") est une lentille convergente (3', 3") sans symétrie de rotation, qui est conçue comme si elle était découpée dans une lentille convergente (8) à symétrie de rotation plus grande, qui comprend un axe optique principal (9), ledit axe optique principal (9) de la lentille convergente (8) imaginaire à symétrie de rotation plus grande s'étendant exactement au centre de cette lentille convergente (8) à symétrie de rotation plus grande et la partie de lentille, découpée de manière imaginaire, c'est à dire la lentille frontale (3', 3") sans symétrie de rotation, est tangente, sur un côté, par rapport au bord normal de la lentille convergente (8) imaginaire initiale à symétrie de rotation plus grande, et
    - la lentille frontale (3', 3") sans symétrie de rotation est disposée de manière excentrée de façon à ce que l'axe optique principal (4) du projecteur (1), représentant le centre du trajet du faisceau lumineux à l'intérieur du projecteur, tombe, au niveau de l'extrémité frontale du projecteur (1), sur la lentille frontale (3', 3") sans symétrie de rotation, de façon à ce que l'axe optique principal (4) du projecteur (1) soit parallèle à l'axe optique principal (9) de la lentille convergente (8) imaginaire initiale symétrique plus grande, mais ne coïncide pas avec celui-ci.
  3. Projecteur focalisable (1) selon l'une des revendications précédentes, caractérisé en ce que la lentille frontale (3) dépasse, dans la direction radiale, partiellement du boîtier (6).
  4. Projecteur focalisable (1) selon l'une des revendications précédentes, caractérisé en ce que la lentille frontale (3, 3', 3") est logée de manière rotative autour de l'axe optique principal (4) du projecteur (1), qui tombe sur elle.
  5. Projecteur focalisable selon l'une des revendications précédentes, caractérisé en ce que la lentille frontale (3") est coulissante dans la direction radiale par rapport à l'axe optique principal (4) du projecteur qui tombe sur elle.
EP04014665.6A 2004-06-23 2004-06-23 Projecteur focalisable avec distribution de lumière disymétrique Expired - Fee Related EP1610055B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04014665.6A EP1610055B1 (fr) 2004-06-23 2004-06-23 Projecteur focalisable avec distribution de lumière disymétrique
CNA2005100788398A CN1724924A (zh) 2004-06-23 2005-06-23 具有非对称光线分布的可聚焦聚光灯
US11/159,136 US7347588B2 (en) 2004-06-23 2005-06-23 Focusable spotlight with asymmetrical light distribution

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04014665.6A EP1610055B1 (fr) 2004-06-23 2004-06-23 Projecteur focalisable avec distribution de lumière disymétrique

Publications (2)

Publication Number Publication Date
EP1610055A1 EP1610055A1 (fr) 2005-12-28
EP1610055B1 true EP1610055B1 (fr) 2016-08-17

Family

ID=34925443

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04014665.6A Expired - Fee Related EP1610055B1 (fr) 2004-06-23 2004-06-23 Projecteur focalisable avec distribution de lumière disymétrique

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US (1) US7347588B2 (fr)
EP (1) EP1610055B1 (fr)
CN (1) CN1724924A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWM364824U (en) * 2008-09-19 2009-09-11 Genius Electronic Optical Co Ltd Optical lens body of bilateral asymmetry polarization illumination
DE102011082844A1 (de) * 2011-09-16 2013-03-21 Zumtobel Lighting Gmbh Beleuchtungsanordnung insbesondere zur Rettungswegbeleuchtung
EP3105497B1 (fr) * 2014-02-04 2018-03-21 TARGETTI SANKEY S.p.A. Dispositif d'éclairage
CN104676485B (zh) * 2015-03-26 2017-07-04 成都恒坤光电科技有限公司 一种用于离散led光源的配光透镜及设备
DE102015119106A1 (de) * 2015-11-06 2017-05-11 Siteco Beleuchtungstechnik Gmbh Innen- oder Außenleuchte, insbesondere Straßenleuchte, mit verlagerbarer Freiformlinse

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2210554A (en) * 1939-01-17 1940-08-06 Charles L Beckman Spotlight

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE386071C (de) 1922-12-01 1923-12-14 Schwabe & Co Linsenscheinwerfer
US2282167A (en) * 1937-08-21 1942-05-05 George M Cressaty Flashlight
US4823243A (en) 1986-08-26 1989-04-18 Dedotec Optronische Und Mechanische Systeme Gmbh Miniature spotlight with extremely variable exit angle and constant even field of illumination
DE19625923A1 (de) * 1996-06-28 1998-01-08 Hella Kg Hueck & Co Scheinwerfer für Fahrzeuge
EP0846913B1 (fr) 1996-12-04 2004-07-07 Dedo Weigert Film GmbH Projecteur à angle d'émission de lumière variable
EP0997684B1 (fr) * 1998-10-29 2005-03-30 Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg Projecteur
DE19901391A1 (de) 1999-01-15 2000-09-14 Weigert Dedo Film Gmbh Scheinwerfer mit veränderlichem Abstrahlwinkel und mit asphärischer Frontlinse
FR2793001B1 (fr) * 1999-04-29 2001-09-14 Valeo Vision Projecteur de vehicule automobile susceptible d'emettre un faisceau de croisement et un faisceau de croisement modifie pour circulation autoroutiere
DE10063134A1 (de) 2000-12-18 2002-06-27 Weigert Dedo Film Gmbh Fokussierbarer Scheinwerfer mit Negativlinse

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2210554A (en) * 1939-01-17 1940-08-06 Charles L Beckman Spotlight

Also Published As

Publication number Publication date
US7347588B2 (en) 2008-03-25
US20050286249A1 (en) 2005-12-29
CN1724924A (zh) 2006-01-25
EP1610055A1 (fr) 2005-12-28

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