EP0846913B1 - Projecteur à angle d'émission de lumière variable - Google Patents

Projecteur à angle d'émission de lumière variable Download PDF

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Publication number
EP0846913B1
EP0846913B1 EP97105686A EP97105686A EP0846913B1 EP 0846913 B1 EP0846913 B1 EP 0846913B1 EP 97105686 A EP97105686 A EP 97105686A EP 97105686 A EP97105686 A EP 97105686A EP 0846913 B1 EP0846913 B1 EP 0846913B1
Authority
EP
European Patent Office
Prior art keywords
light source
reflector
converging lens
positive lens
optical unit
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 - Lifetime
Application number
EP97105686A
Other languages
German (de)
English (en)
Other versions
EP0846913A1 (fr
Inventor
Dedo Arndt 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 EP97105686A priority Critical patent/EP0846913B1/fr
Priority to US08/985,192 priority patent/US6004007A/en
Publication of EP0846913A1 publication Critical patent/EP0846913A1/fr
Application granted granted Critical
Publication of EP0846913B1 publication Critical patent/EP0846913B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/02—Fastening of light sources or lamp holders with provision for adjustment, e.g. for focusing
    • 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 with variable Beam angle with a light source, one of the light sources assigned reflector, one in the radiation direction of the Light source-reflector combination arranged in the beam path first converging lens and one in the beam path between the Light source and the first converging lens arranged second Converging lens, the reflector, the light source and the second converging lens as one relative to the first converging lens optical moving along the optical axis of the headlamp Unit are mounted and within the optical unit the distance between the light source and the second converging lens is changeable.
  • Headlights have long been state of the art known with variable beam angle. These can be essentially in two classes, namely stepped lens headlights and divide headlights with a very deep reflector.
  • step lens headlights have a single one Step lens (Fresnel lens) on.
  • Step lens Fresnel lens
  • incandescent lamps halogen lamps or discharge lamps are used.
  • the light source and a Reflectors are at a fixed distance from each other on a sled assembled.
  • the sled is relative to the Fresnel lens movable.
  • the focus is done by moving the Carriage.
  • step lens headlights results however, for focusing settings with a small beam angle a significant effective loss of light. Because no second lens is present that focuses the light towards the Fresnel lens, becomes a large part of the focusing settings mentioned the light emitted by the light source simply by the Housing inner wall absorbs, leading to loss of light and too useless housing heating leads.
  • Headlights with a very deep reflector are common constructed so that lamp and reflector are relative to each other can be moved, but the lamp is always within of the reflector remains on its optical axis. By changing the position of the lamp within the reflector becomes the beam angle of such a headlamp changed. However, the focus path that can be achieved is low, so that the beam angle is only within relatively narrow limits can be varied.
  • Such headlights provide one high luminous efficacy, but one in almost all lamp positions unfavorable light distribution. Cause of this in general bad light distribution is that for everyone such headlights each have a predetermined reflector shape with respect to the resulting light distribution only on each a single lamp position can be optimally coordinated. Result from focusing movements of the lamp or the reflector uneven light distributions.
  • the illuminance characteristic has a illuminated field on a soft shoulder, however is the light intensity over the entire illuminated Range essentially constant.
  • the invention has for its object a headlight to provide with a variable beam angle, the one compared to the known headlights with variable Beam angle even higher variability of the beam angle and that offers light intensity.
  • this object is achieved by a Headlamp with variable beam angle with a Light source, a reflector assigned to the light source, one in the radiation direction of the light source-reflector combination arranged in the beam path first collecting lens and one in the beam path between the light source and the first converging lens arranged second converging lens, the reflector, the light source and the second converging lens as one relative to the first converging lens along the optical axis of the Headlights movable optical unit are mounted, within the optical unit the distance between the Light source and the second converging lens is changeable and within the optical unit the distance between the Light source and the reflector is changeable.
  • the headlamp according to the invention with variable Beam angle has all the advantages of US-A-4,823,243 known headlights, but has a higher variability of the beam angle and the light intensity. Despite the enlarged construction can focus the construction of the invention Headlights can be kept small.
  • the optical unit is designed so that when the optical unit moves from the first Converging lens away the distance between the light source and the Reflector remains essentially constant until the Reflector one according to the headlight dimensions has reached the extreme distance to the first converging lens and in stops moving, and when the reflector stops moving in its extreme distance from the first converging lens is the light source a predetermined distance further towards the Reflector can be moved and reversed movement described first the light source at standstill of the reflector in the direction of the predetermined distance the first converging lens is moved and after passing through the predetermined path through the light source of the reflector is moved so that the distance between the light source and the reflector remains essentially constant.
  • the focusing area is particularly towards expanded at small angles. Furthermore, described by the Reduction of the distance between the light source and the reflector the losses when focusing in the narrow angle Beam area significantly reduced. The change the illuminance is in the narrow-angle radiation range disproportionate to the change in the beam angle large, resulting in a particularly strong increase in light intensity variability compared to the state of the art Technology known headlights results.
  • the optical unit is designed so that when the optical unit moves along the optical Axis at least part of the way the distance changed between the light source and the reflector.
  • optical unit executes that the distance between the light source and the reflector when the optical unit moves from the the first converging lens is continuously reduced and at a movement of the optical unit to the first converging lens continuously increased.
  • Fig. 1a is an embodiment of the invention Headlight shown in cross section.
  • the headlight has a cup-like, opaque housing 1, in that a first converging lens 2 is used on the light exit side is.
  • a light source 4 by a small filament lamp Helix is formed, and one assigned to the light source 4 Reflector 5 arranged.
  • the light source 4 and the reflector 5 are mounted so that the resulting light beam path in Direction of the first converging lens 2 is directed.
  • is on the carriage 3 in the beam path between the light source 4 and the first condenser lens 2 is arranged a second condenser lens 6.
  • the second converging lens 6 is a meniscus lens with a crystalline etched concave surface, the convex surface in the direction of the first converging lens 2 has.
  • the light source 4, the reflector 5 and the second Collecting lens 6 are mounted so that both the distance between the light source 4 and the second converging lens 6 as also the distance between the light source 4 and the reflector 5 can be changed.
  • both the first converging lens 2 as well as in the second converging lens 6 each have a lens surface to be grained so that a microlens structure arises. This measure makes one special good uniformity of light distribution achieved.
  • Fig. 1a shows the light source 4, the reflector 5 and the second converging lens 6 in a position of maximum beam angle of the headlight according to the invention.
  • the distance between the first converging lens 2 and the second converging lens 6 as well the distance between the second converging lens 6 and the light source 4 are minimal according to the headlight dimensions, and the distance between the light source 4 and the reflector 5 is the maximum according to the installation conditions Distance.
  • the slide 3 moved in the direction away from the first converging lens 2.
  • Guide parts designed so that the second converging lens 6 initially remains in its original position and itself only the light source 4 and the reflector 5 while maintaining their original mutual distance in the direction of move the first converging lens 2 away. That kind of movement lasts until the distance between the light source 4 and the second converging lens 6 reaches a predetermined value
  • Has. 1b shows the optical system of the invention Headlights in this position.
  • the reflector 5 reaches one accordingly the headlight dimensions of the extreme distance from the first Converging lens 2 and stops moving (see Fig. 1d). This is the position in which the one from US-A-4,823 243 known headlights its minimal beam angle and reaches its maximum illuminance.
  • the light source 4 and the second converging lens 6 below Maintain their mutual distance stationary reflector 5 still further from the first converging lens 2 away and thus closer to the reflector 5 (see Fig. 1e).
  • FIGS. 2a to 2e of the headlight according to the invention A further embodiment is shown in FIGS. 2a to 2e of the headlight according to the invention.
  • This embodiment of the headlamp according to the invention is essentially identical to that shown in Figures 1a to 1e Embodiment of the headlight according to the invention. The the only difference is that if the reflector 5 its extreme according to the headlight dimensions Has reached distance to the first converging lens 2 in the embodiment 2a to 2e also the second converging lens 6 not moved further away from the first converging lens 2 can be.
  • FIGS. 4 and 5 show light distribution characteristics of the headlight known from US-A-4 823 243 (FIG. 4) and the embodiment of the headlight according to the invention described with reference to FIGS. 2a to 2e (FIG. 5). It can be seen that the headlight according to the invention has a somewhat larger radiation angle range and, particularly in the narrow-angle radiation range, offers a surprisingly greater variability in illuminance.
  • characteristic data of the described embodiment of the headlamp according to the invention are compared with corresponding data of headlamps from ARRI belonging to the prior art.
  • the parameter focusing ratio: angle ratio is close to 1, achieves the mentioned parameter the headlight according to the invention has a value of almost 2. Also the absolute focusing ratio is in the case of the invention Headlights two to four times larger than those from the State of the art headlights.
  • the second converging lens 6 rear section of the movement of the carriage 3 from the first lens 2 is not suddenly, but it will at constant relative speed between the light source 4 and the first converging lens 2 the relative speed between the second converging lens 6 and the first converging lens 2 continuously slows down until the second converging lens 6 then finally stops while the reflector 5 and the light source 4 while maintaining their mutual Move the distance away from the first converging lens 2 (Fig. 3a to 3e). Finally, the reflector 5 reaches the one shown in FIG.
  • the reflector 5 is always a relatively flat reflector and the light source 4 as one Filament lamp shown upright.
  • the light source 4 as one Filament lamp shown upright.
  • Filament lamp can also light source 4, for example a halogen lamp or a discharge lamp without a filament with a light spot between two electrodes.
  • light source 4 should be as small as possible in any case being held.

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

Claims (4)

  1. Projecteur à angle de rayonnement variable, comprenant
    une source de lumière (4),
    un réflecteur (5) associé à la source de lumière (4),
    une première lentille convergente (2) disposée sur le trajet des rayons, dans la direction de rayonnement de la combinaison source de lumière-réflecteur (4, 5), et
    une deuxième lentille convergente (6) disposée sur le trajet des rayons, entre la source de lumière (4) et la première lentille convergente (2), où
    le réflecteur (5), la source de lumière (4) et la deuxième lentille convergente (6) sont montés sous la forme d'un ensemble optique, mobile par rapport à la première lentille convergente (2), le long de l'axe optique du projecteur, et
    à l'intérieur de l'ensemble optique, l'espacement entre la source de lumière (4) et la deuxième lentille convergente (6) est modifiable,
       caractérisé en ce que l'espacement entre la source de lumière (4) et le réflecteur (5) est modifiable.
  2. Projecteur selon la revendication 1, caractérisé en ce que l'ensemble optique est réalisé de manière que, lors d'un déplacement de l'ensemble optique, en s'éloignant de la première lentille convergente (2), l'espacement entre la source de lumière (4) et le réflecteur (5) reste pratiquement constant jusqu'à ce que le réflecteur (5) atteigne un espacement le plus à l'extérieur, correspondant aux dimensions du projecteur, par rapport à la première lentille convergente (2) et arrête de se déplacer et, lors de l'immobilisation du réflecteur (5) à son espacement le plus à l'extérieur par rapport à la première lentille convergente (2), la source de lumière (4) peut continuer à se déplacer sur la valeur d'une course de déplacement prédéterminée, dans la direction du réflecteur (5) et, qu'en cas d'inversion du déplacement décrit, d'abord la source de lumière (4) alors que le réflecteur (5) est immobilisé, soit déplacée dans la direction de la première lentille convergente (2) de la valeur de la course de déplacement prédéterminée et, qu'après avoir parcouru la course de déplacement prédéterminée à travers la source de lumière (4), le réflecteur (5) soit déplacé conjointement, de manière que l'espacement entre la source de lumière (4) et le réflecteur (5) reste sensiblement constant.
  3. Projecteur selon la revendication 1, caractérisé en ce que l'ensemble optique est réalisé de manière que, lors d'un déplacement de l'ensemble optique le long de l'axe optique, au moins sur une partie de la course, l'espacement entre la source de lumière (4) et le réflecteur (5) soit modifié.
  4. Projecteur selon la revendication 3, caractérisé en ce que l'ensemble optique est réalisé de manière que l'espacement entre la source de lumière (4) et le réflecteur (5), lors d'un déplacement de l'ensemble optique en s'éloignant de la première lentille convergente (2), est diminué de façon continue et, en cas de déplacement de l'ensemble optique vers la première lentille convergente (2), est augmenté de façon continue.
EP97105686A 1996-12-04 1997-04-07 Projecteur à angle d'émission de lumière variable Expired - Lifetime EP0846913B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP97105686A EP0846913B1 (fr) 1996-12-04 1997-04-07 Projecteur à angle d'émission de lumière variable
US08/985,192 US6004007A (en) 1996-12-04 1997-12-04 Spotlight with an adjustable angle of radiation

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP96119479 1996-12-04
EP96119479 1996-12-04
EP97105686A EP0846913B1 (fr) 1996-12-04 1997-04-07 Projecteur à angle d'émission de lumière variable
US08/985,192 US6004007A (en) 1996-12-04 1997-12-04 Spotlight with an adjustable angle of radiation

Publications (2)

Publication Number Publication Date
EP0846913A1 EP0846913A1 (fr) 1998-06-10
EP0846913B1 true EP0846913B1 (fr) 2004-07-07

Family

ID=27237467

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97105686A Expired - Lifetime EP0846913B1 (fr) 1996-12-04 1997-04-07 Projecteur à angle d'émission de lumière variable

Country Status (2)

Country Link
US (1) US6004007A (fr)
EP (1) EP0846913B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2151622A1 (fr) 2008-08-08 2010-02-10 Oec Ag Dispositif d'éclairage doté d'un angle de rayonnement variable
WO2013016923A1 (fr) * 2011-08-03 2013-02-07 广州市雅江光电设备有限公司 Système optique de projecteur à diodes électroluminescentes et son procédé de projection de lumière

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19901391A1 (de) 1999-01-15 2000-09-14 Weigert Dedo Film Gmbh Scheinwerfer mit veränderlichem Abstrahlwinkel und mit asphärischer Frontlinse
DE29914114U1 (de) * 1999-08-07 1999-11-04 Arnold & Richter Kg Scheinwerfer
DE19939126A1 (de) * 1999-08-18 2001-02-22 Weigert Dedo Film Gmbh Scheinwerferbaureihe
DE10063134A1 (de) * 2000-12-18 2002-06-27 Weigert Dedo Film Gmbh Fokussierbarer Scheinwerfer mit Negativlinse
DE10113385C1 (de) * 2001-03-16 2002-08-29 Schott Glas Stufenlinsenscheinwerfer
AU2003243664A1 (en) * 2002-06-20 2004-01-06 Eveready Battery Company, Inc. Lighting device with adjustable spotlight beam
EP1610055B1 (fr) 2004-06-23 2016-08-17 Dedo Weigert Film GmbH Projecteur focalisable avec distribution de lumière disymétrique
EP1653255A3 (fr) * 2004-10-29 2006-06-21 Pentair Water Pool and Spa, Inc. Lentille à faisceau positionnable pour éclairage sous l'eau
JP2008525833A (ja) * 2004-12-28 2008-07-17 カール ツアイス エスエムティー アーゲー ２つ以上の光学部品を取り付けるための装置及び光学部品の表面処理法
US8075162B2 (en) * 2008-09-12 2011-12-13 Light Prescriptions Innovators, Llc Zoom luminaire with compact non-imaging lens-mirror optics
EP3742047B1 (fr) * 2019-05-21 2021-07-07 Zumtobel Lighting GmbH Système optique pour projecteur
CN111649282B (zh) * 2020-07-01 2021-10-29 中国人民解放军63660部队 一种可调式太阳辐照模拟器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2177639A (en) * 1938-09-13 1939-10-31 Motion Picture Electric Produc Focusing device for incandescent studio spotlights
GB2037415B (en) * 1978-12-15 1982-09-22 Furse & Co Ltd W Spotlight
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
US5083253A (en) * 1988-01-14 1992-01-21 Walter Hahnel Lighting unit
US5408398A (en) * 1994-04-01 1995-04-18 Chang; Ming C. Reflecting base assembly for performance stage lamps
US5461554A (en) * 1994-06-10 1995-10-24 Leonetti Company Double ended high intensity lamp holder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2151622A1 (fr) 2008-08-08 2010-02-10 Oec Ag Dispositif d'éclairage doté d'un angle de rayonnement variable
DE102008037054A1 (de) 2008-08-08 2010-02-11 Oec Ag Beleuchtungsvorrrichtung mit veränderlichem Abstrahlwinkel
WO2013016923A1 (fr) * 2011-08-03 2013-02-07 广州市雅江光电设备有限公司 Système optique de projecteur à diodes électroluminescentes et son procédé de projection de lumière

Also Published As

Publication number Publication date
EP0846913A1 (fr) 1998-06-10
US6004007A (en) 1999-12-21

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