EP1409920B1 - Leuchte - Google Patents

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Publication number
EP1409920B1
EP1409920B1 EP01929333A EP01929333A EP1409920B1 EP 1409920 B1 EP1409920 B1 EP 1409920B1 EP 01929333 A EP01929333 A EP 01929333A EP 01929333 A EP01929333 A EP 01929333A EP 1409920 B1 EP1409920 B1 EP 1409920B1
Authority
EP
European Patent Office
Prior art keywords
lighting fixture
light
rings
longitudinal axis
light beam
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
EP01929333A
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English (en)
French (fr)
Other versions
EP1409920A1 (de
Inventor
Thomas Brockmann
Peter Igor Werchenskij Plesner
Christian Poulsen
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.)
Nv Adb Ttv Technologies SA
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Nv Adb Ttv Technologies SA
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Filing date
Publication date
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Publication of EP1409920A1 publication Critical patent/EP1409920A1/de
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Publication of EP1409920B1 publication Critical patent/EP1409920B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S10/00—Lighting devices or systems producing a varying lighting effect
    • F21S10/007—Lighting devices or systems producing a varying lighting effect using rotating transparent or colored disks, e.g. gobo wheels
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/505—Cooling arrangements characterised by the adaptation for cooling of specific components 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/08—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures
    • F21V11/10—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures of iris type
    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/16—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using sheets without apertures, e.g. fixed
    • F21V11/18—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using sheets without apertures, e.g. fixed movable, e.g. flaps, slides
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0435—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by remote control means
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/745—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades the fins or blades being planar and inclined with respect to the joining surface from which the fins or blades extend
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/75—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/767—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having directions perpendicular to the light emitting axis
    • 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 present invention relates to a lighting fixture for projecting a beam of light and for use for spot lighting in connection with theater stages, cinema and television studios and the like, the fixture comprising:
  • a lighting fixture as defined above is to produce a well-defined light beam or light cone with a geometry, angle of conicity and focal point that may be altered manually or by remote control.
  • a lighting fixture will normally comprise a light source, a reflector, a beam-shaping gate with beam-shaping blades, a pattern or gobo, an iris, a focusing lens, a zoom lens and a color filter as well as a suspension structure allowing the lighting fixture to be pivoted vertically and horizontally.
  • the visible part of the light emitted by the light source is collected by the reflector and is sent towards the iris, the gobo and the beam-shaping gate as a parallel light beam.
  • the infrared part of the radiation from the light source passes through the dichroic coating of the reflector and impinges on the inner surface of the housing surrounding the light source, the heat being transported to the outer surface of the housing having cooling ribs for emitting the heat to the surrounding atmosphere.
  • the zoom lens varying the angle of conicity of the light cone and by shaping or cutting off the periphery of the light beam by means of the beam-shaping gate with beam-shaping blades so as to obtain geometrical figures such as squares, triangles, trapezes etc.
  • the lenses project the light out through the aperture of the housing opposite the light source and through the color filter at the front end of the lighting fixture. It is important that the different elements influencing the shape and other characteristics of the light beam function as precisely as possible even when being influenced by the heat radiated from the light source and not removed by means of the dichroic reflector. This entails that the location and the configuration of the adjustment means for the beam-shaping blades, the gobo and iris are such that any bending caused by the heat influence from the light beam be kept at a minimum.
  • Lighting fixtures of this type are often arranged in places where it is difficult to access them manually and it is therefore of great importance that the adjustment means for adjusting the above-mentioned beam influencing means be as easily accessed and as flexible as possible when manual operation of the adjustment means is required.
  • US Patent NO. 5,345,371 discloses a lighting fixture of the type in reference where the four beam-shaping blades or shutters are slidingly insertable in slots from outside, the shutters being radially adjustable by gripping a holder for each shutter and sliding the shutter in or realtive to the optical axis.
  • the shutters may also be tilted manually to a certain extent.
  • a further tilting possibility is acieved by allowing the portion of the fixture containing the shutters to be rotated as a unit around the axis.
  • Motorisation for remote control of this design will be very complicated and costly.
  • US Patent No. 4,890,208 discloses a lighting fixture of the type in reference where four shutters are arranged for motorized displacement radially towards the optical axis and motorized tilting by means of rack and pinion mechanisms. This solution is complicated and has only limited tilting capability, i.e. displacement capability circumferentially around the axis. Furthermore this solution is not weel suited for manual operation.
  • this object is achieved by at least the adjustment means corresponding to said one or more beam-shaping blades and preferably all the adjustment means, which are arranged for rotation around said longitudinal axis and are connected to a respective influencing means such that rotation of the adjustment means around said longitudinal axis adjusts the position of the respective influencing means relative to said longitudinal axis, comprise an annular body arranged with the axis thereof substantially coinciding with said longitudinal axis and the annular body comprises an outer rim for being engaged for applying rotative force thereto, the surface of said outer rim being provided with friction enhancing means such as roughening means, rubber surfacing, projections or teeth.
  • friction enhancing means such as roughening means, rubber surfacing, projections or teeth.
  • the fixture further comprises one or more electrical motors connected to a respective drive wheel engaging said outer rim of a respective annular body for applying rotative force thereto, and preferably the drive wheel is a gear and the respective outer rim engaged by a respective gear is provided with teeth for meshing with the teeth of said gear when said gear rotates.
  • the annular body be provided with a position indicating means for indicating the angular position of the annular body relative to said longitudinal axis.
  • a reference point for the remote control operation is available thereby eliminating errors and inaccuracies.
  • the position indicating means comprises an element that may be remotely sensed such as a magnet or a gap
  • the fixture further comprises remote sensing means for sensing the angular position of said element relative to said longitudinal axis.
  • the adjustment means for each of the one or more beam-shaping blades comprises radial adjustment means for adjusting the position of the blade radially relative to said axis and circumferential adjustment means for adjusting the position of said blade circumferentially around said axis.
  • each of the one or more beam-shaping blades comprising two adjacent co-centrical annular bodies or rings each connected to one point of the blade such that relative rotation of the two rings alters the radial position of the blade.
  • the rings comprise guiding tracks recessed into the lateral surface of each ring facing the other ring
  • each blade comprises a body extending generally transversely to said axis and two arms extending generally parallel to said axis, the arms each being provided with sliding connecting means for connecting the respective arm to each of the rings and being adapted for being slidingly received in a guiding track in each of said rings.
  • a lighting fixture 1 is suspended in a suspension fitting 2 having an aperture 3 for fixing the fitting 2 pivotably to a not shown support structure in a theater, a television studio or the like.
  • the fitting 2 is pivotably attached to the body of the lighting fixture 1 at 4, the attachment point being adjustable by sliding the pivot attachment point 4 in a slit 5 in a frame 6 so as to compensate for change of balance because of insertion or removal of different elements in the lighting fixture 1.
  • the lighting fixture 1 may thus be manually pivoted around two mutually substantially orthogonal axes allowing the direction of a light beam emitted by the fixture to be any desired direction.
  • the pivoting action may be achieved by means of remotely controlled electrical motors in many different ways that will be obvious to those skilled in the art.
  • the frame 6 is generally U-shaped having two arms supporting the body of the lighting fixture 1 between said arms.
  • a series of toothed rims 7-18 are arranged for rotation around a longitudinal or optical axis 19 (see Fig. 3).
  • the teeth of the toothed rims are configured such that the teeth of a pinion of a drive unit may engage and mesh therewith if the light beam influencing facilities of the lighting fixture operated by rotation of the bodies 7-18 are to be motorized for remote control.
  • the teeth of the toothed rims serve as a roughening element of the surface of the rim of each of the annular bodies 7-18 such that good frictional engagement between the fingers of a hand and the toothed rims or annular bodies 7-18 may be achieved for rotating the annular bodies 7-18 manually.
  • Such roughening of the rim surface may be achieved in many other ways such as scoring of the surface or coating with rubber or provision of small projections etc.
  • a frictional surface engagement of for instance the surface of a rubber coated drive wheel driven by an electrical motor with the roughened rim surface may be provided for instead of the meshing of the teeth of a pinion with teeth of the rim of the annular body.
  • a light source or lamp 20 emits a light beam composed of individual light beams such as illustrated at 20a, the visual portion thereof being reflected by a dichroic reflector 21 through a focusing lens 22 and a zoom lens 23 and out of the lighting fixture through an aperture 24 in the housing 25 of the fixture 1, the light beam 20a travelling through a not shown color filter arranged in four color filter holders 26 that may be pivoted around pivots 27 so as to allow a color filter to be inserted and removed in the holders 26 in any of four directions determined by the four holders 26.
  • the color filter may be inserted and removed from the best angle for manual access for a given orientation of the housing 25.
  • the entire light beam projected by the lighting fixture is of course composed of a plurality of light beams analogous to individual light beam 20a.
  • the infra red portion of the light beam 20a is transmitted through the dichroic reflector 21 to cooling ribs 22 in a manner well known in the art so as to reduce the heat distortion of elements arranged along the path of the light beam from the light source 20 to the exit aperture 24.
  • These elements comprise an iris 28 connected to the annular body 7, a pattern or gobo 29 connected to the annular body 8, four beam-shaping blades 30, 31, 32 and 33 connected to the pairs of annular bodies, 9 -10, 11-12, 13 -14 and 15-16, respectively, the focusing lens 22 connected to the annular body 17, and the zoom lens 23 connected to the annular body 18.
  • the annular bodies or rings 7-18 are connected in different manners to the respective light beam influencing elements 22, 23 and 28-33 so that the position of these elements may be altered relative to the axis 19, and thus the light beam, by rotating the rings around said axis.
  • the individual connections between the individual rings and the respective elements will be described more in detail in the following.
  • the feature of being able to alter the position of the light influencing elements and particularly of the light beam shaping blades 30-33 by means of rotating the corresponding rings allows the position alteration to be carried out manually from a convenient angle of approach for a given orientation of the housing 25.
  • the rim surface of each of the rings 7-18 may be engaged manually at most of the extent of the circumference thereof, the manual adjustment of the position of a respective light beam influencing element may be performed from the most convenient angle of approach to the housing 25.
  • the manual adjustment may be carried out with one hand which is important as the fixture is often located such that access with both hands is difficult and perhaps impossible.
  • the lighting fixture according to the invention does not have the disadvantages of known lighting fixtures where the adjustment means for adjusting the position of a light beam shaping blade may be very inconveniently located relative to the position of the person operating the lighting fixture so that the person for instance has to reach around the lighting fixture housing to access the adjustment means thereby risking being burned on the hot housing surface and rendering rapid and precise position adjustment difficult and perhaps impossible.
  • rotative means other than rings with a rim surface for being engaged manually or mechanically Elements having a plurality of radially extending spokes spaced circumferentially for being engaged at the ends thereof by fingers of a hand or a motorized driving means may also be used.
  • a circumferentially disposed endless belt arranged for substantially circular movement around the longitudinal axis may also be utilized instead of the illustrated rings. All means allowing access along a major part of the circumference of the housing and rotative frictional engagement by fingers or a motorized drive unit may be used to allow such convenient access to the adjustment means for altering the position of the beam influencing elements.
  • the feature of altering the position of the light influencing elements by rotative means also entails simple and reliable establishment of a certain adjustment setting of a respective influencing means such that pre-programmed settings may be set up for certain lighting requirements knowing that it will be simple, quick and reliable to achieve such settings either manually or remotely under difficult conditions, for instance during the course of a theater show where adjustments in the dark are necessary.
  • a further advantage is obtained by the shown structure according to the invention in that the construction is such that no light is emitted from the interior of the fixture except through the aperture 24, and all adjustments of the light beam influencing elements may be carried out without creating a light emission slit or aperture.
  • the disadvantage of all known lighting fixtures that light "leaks" therefrom is eliminated which is of great value, particularly for theater use.
  • the frame 6 is constituted by two identical halves 6a and 6b abutting each other at 6c.
  • the rings or annular bodies 7-18 are rotatably and slidingly supported in annular grooves 34 in annular support rings 35 by means of annular projections or ridges 36 slidingly received in the annular grooves 34.
  • the support rings 35 are each constituted by half a ring fixedly attached to or made in one piece with one half of the frame 6, for instance 6a (see Fig. 1).
  • each of the frame halves 6a and 6b is fixedly attached to or integral with a series of half rings 35 as shown in Fig. 5, where the bottom half 6b of the frame 6 is shown with the corresponding half rings 35.
  • the adjustment rings 7-18 with corresponding beam influencing elements 22, 23 and 28-33 are arranged in the bottom half 6b of the frame with corresponding half rings 35 such that the ridge 36 of each adjustment ring is received in the corresponding groove 34 of the respective half ring 35 of the bottom frame half 6b.
  • the top half 6a of the frame 6 with corresponding half rings 35 is placed abutting the bottom half 6b at 6c such that the ridge 36 of each adjustment ring is received in the corresponding groove 34 of the respective half ring 35 of the top frame half 6a.
  • the adjustment rings 7-18 will thus be slidingly and rotatively supported along the entire cicumference thereof by the corrresponding rings 35.
  • Each of the adjustment rings or annular bodies 7-18 may then be rotated manually or by means of suitable mechanical means by applying a tangential force to the rim of the respective adjustment ring whereby the ridge 36 thereof slides in the respective annular groove 34 of the respective support ring 35.
  • the material of the ridges 36 and the grooves 34 are chosen such that frictional sliding resistance is kept at a minimum.
  • the support rings 35 may be made of cast aluminium, and the adjustment rings may be made of glass-fiber reinforced plastic.
  • the ridges 36 are made of a low frictional material such as teflon, a ring of said material being embedded in the lateral surface of the corresponding adjustment ring.
  • the frictional sliding resistance between the low friction material and the cast aluminium will be low, and the adjustment rings may consequently be rotated by applying a relatively small tangential force to the rim thereof.
  • Each of the adjustment ring pairs 9/10, 11/12, 13/14 and 15/16 carries a respective light beam shaping blade 33, 32, 31 and 30, respectively, by means of pairs of arms 33a,b, 32a,b, 31a,b and 30a,b, respectively, held by the adjustment ring pairs in a manner described more in detail below. So that the two rings of each ring pair can rotate relative to one another, a low friction material ring 37 is arranged between each pair of adjustment rings as illustrated in Figs. 4 and 6.
  • the blades 30-33 are nested as illustrated in Figs. 4, 6 and 7, each blade 30-33 being carried by a pair of opposed arms, 30a-33a and 30b-33b, respectively.
  • the blades 30-33 are located as axially close to each other as possible so as to achieve a sharp cut-off boundary of the light beam all around the cicumference thereof which only can be achieved if the blades are arranged such that there is no substantial distance between them in the axial direction of the housing.
  • the arrangement shown also has the advantage that the axial distance between the beam-shaping blades 30-33 and the iris 28 as well as the gobo or pattern 29 is small so that a good sharpness or quality of the influence of the blades, the iris and the gobo on the light beam may be obtained simultaneously because of the small axial distance covered by all said elements.
  • the blades 30-33 are shaped as shown in Figs. 6-8 having a generally elliptical planar body 38 with an aperture 39 having a periphery comprising a curved portion 40 and linear portions 41, 42 and 43, said periphery serving as the beam cut-off edge of the blade body 38.
  • This is illustrated in Fig. 7 where the peripheries of the apertures 39 of the four bodies 38 of the blades 30-33 define the periphery of the beam shaping aperture 44.
  • a multitude of different shapes of the aperture 44 may be achieved by a combination of a rotation of the different blades 30-33 around the axis 19 with a displacement of said blades 30-33 radially relative to said axis 19.
  • the radial displacement of the individual blades 30-33 is illustrated in Figs. 8-9 where the periphery portion 42 of blade 33 is shown in Fig. 8 at the maximum radial distance from the axis 19 and in Fig. 9 at the minimum radial distance from said axis 19.
  • the rotational displacement is achieved by rotating the ring pair 9/10 carrying the blade 33 around the axis 19. Combinations of the radial and the rotational displacement of each blade allows the creation of a great variety of peripheral shapes of the aperture 44.
  • the elliptical shape of the 39 has been chosen to give a relative stiff blade as well as a continuous and smooth outer perimeter of the body.
  • the bodies of the blades interfere with one another when they are displaced relative to one another even though the axial spacing of the bodies is small.
  • the radial displacement of the bodies take place in shuc a manner that practically no flexing of the arms takles place during such displacement, i.e. that the distance between the ends of the arms of each pair is constant during such radial displacement and that no torsional forces are exerted on the arms during such radial displacement.
  • Each arm is provided with an angled end portion 45 having a guiding pin 46 extending therethrough and projecting from both opposed surfaces of the angled portion 45.
  • the plane of each end portion 45 is substantially parallel to the plane of the body 38 of the respective blade.
  • each pair of rings for instance 15 and 16 in Fig. 6 or 9 and 10 in Fig. 8-9 are identical and one lateral surface of each ring is provided with a recessed circumferentially extending track 47 in the bottom of an annular circumferentially extending recess 48 and an elongate radially extending track 49 in the bottom of an annular circumferentially extending recess 50 identical to recess 48 and arranged diametrically opposite recess 48.
  • the two rings 15, 16 in Fig. 6 and the two rings 9, 10 in Figs 8 and 9 are arranged abutting each other with the lateral surfaces thereof provided with the recesses 48 and 50 facing one another such that recess 48 of ring 15 (ring 9) faces and overlies recess 50 of ring 16 (ring 10) and recess 50 of ring 15 (ring 9) faces and overlies recess 48 of ring 16 (ring 10).
  • annular channels 51 for receiving the angled end portions 45 of the arms are formed when the rings of a pair 9/10, 11/12, 13/14 or 15/16 are arranged abutting each other.
  • each guiding pin 46 of each end portion 45 is inserted in the circumferential track 47 of one ring of a pair of rings while the other projecting end is inserted in the radial track 49 of the other ring of said pair of rings.
  • the geometry of the tracks 47 and 49 are such that when one ring of a pair of rings is rotated relative to the other ring of the pair, then the respective body 38 of the blade carried by the pair of rings in question is displaced radially such that the distance between the pins 46 of the two arms of the respective blade remains constant and the arms are not subjected to any torsional stresses.
  • ring pair 9/10 is shown with ring 9 abutting and overlying ring 10.
  • both rings are shown in full lines for the sake of clarity and to illustrate the relative positions of the tracks 47 and 49 of both rings.
  • ring 10 has been turned 10 degrees clockwise such that the track 47 thereof shown at left in Fig. 8 is turned 10 degrees clockwise while ring 9 has been turned 10 degrees counterclockwise so that track 47 thereof shown at right in Fig. 8 is turned 10 degrees counterclockwise. Consequently track 49 of ring 10 shown at right in Fig. 8 is turned 10 degrees clockwise while track 49 of ring 9 shown at left in Fig. 8 is turned 10 degrees counterclockwise.
  • the angles clockwise and counterclockwise are given relative to an initial position where the body 38 is at the halfway position between Fig.8 and Fig.9.
  • the maximum periphery of the light beam is shown by the circle 52.
  • ring 10 has been turned 10 degrees counterclockwise such that track 47 thereof shown at left in Fig. 9 is turned 10 degrees counterclockwise while ring 9 has been turned 10 degrees clockwise so that track 47 thereof shown at right in Fig. 9 is turned 10 degrees clockwise. Consequently track 49 of ring 10 shown at right in Fig. 9 is turned 10 degrees counterclockwise while track 49 of ring 9 shown at left in Fig. 9 is turned 10 degrees clockwise.
  • a multitude of different beam periphery shapes may be achieved by displacing the blades 30-33 radially by rotating the two rings of the corresponding ring pair relative to one another and by displacing the blades circumferentially by rotating the two rings of a ring pair together.
  • Fig. 7 one of infinitely many combinations of radial and circumferential positions of the four blades 30-33 is shown whereby a beam 44 with the shown eight sided polygonal periphery shape is achieved.
  • the shapes of the tracks 47 and 49 are configured accordingly as described in the following with reference to Fig. 10 which illustrates the construction and calculation of the said shapes of the tracks 47 and 49.
  • Angle1 and Angle2 are used to construct two triangles.
  • a line is drawn along the centre line, the line having a length equal to half the length between the two pins 46 of a blade.
  • C1 is now a radius which together with Angle3 may used to construct the track by means of the equations 1.3
  • Xtrack ⁇ 47 COS ( Angle ⁇ 3 ) ⁇ C ⁇ 1
  • Ytrack ⁇ 47 SIN ( Angle 3 ) ⁇ C ⁇ 1
  • Xtrack ⁇ 47 COS Angle ⁇ 3 ) ⁇ ( A ⁇ 1 / COS ( Angle ⁇ 1 )
  • Ytrack ⁇ 47 sin Angle ⁇ 3 ) ⁇ ( A ⁇ 1 / COS ( Angle ⁇ 1 )
  • the X and Y axes being as indicated in Fig. 10 for each point constructed.
  • the track 49 in one ring extends in the radial direction to take up the radial displacement of the corresponding end of the pin 46 arising from the geometry of the track 47 in the other ring.
  • Xtrack ⁇ 49 A ⁇ 1 / COS ( Angle ⁇ 1 )
  • Xtrack ⁇ 49 0 such that the fixed distance is maintained between the ends of the pins 46 in corresponding points of tracks 47 and 49.
  • FIG. 11 an alternative way of arranging the beam influencing blades is shown schematically.
  • Two adjustment rings 56, 57 similar to the adjustment rings 9,10 of Figs. 8 and 9 are arranged abutting each other with a beam shaping blade 60 arranged therebetween and attached to the rings by means of two guiding pins 61 and 62.
  • Pin 61 is received in a recess in the lateral surface of ring 57 facing ring 56, the recess having a shape that only allows rotation of the pin 61 therein.
  • Pin 62 is received in a linear track 63 recessed into the lateral surface of ring 56 facing ring 57. The pin 62 may slide in the track 63.
  • the situation wherein the blade 60 maximally obstructs the beam of light 52 is shown in full lines while the situation wherein the blade 60 does not obstruct the beam 52 is shown in dotted lines.
  • the fully obstructing position of blade 60 is amended to the non-obstructing position thereof by rotating the ring 56 and 57 relative to one another for instance as shown by rotating ring 56 counterclockwise and maintaining ring 57 in the same position.
  • the pin 62 will be forced to slide in the track 63 while the pin 61 merely rotates such that the blade rotates around the pin 61.
  • a rotation of ring 56 counterclockwise 12 degrees will result in a rotation of 22 degrees of the blade 60.
  • This arrangement of the beam shaping blades requires relatively stiff blades and/or relatively large axial spacing between the individual blades so as to avoid that the blades interfere with or engage one another when being rotated.
  • Holder 64 for the zoom lens 23 and holder 65 for the focusing lens 22 are slidingly arranged in tracks 66 and 67, respectively, in track rails so that the holders 64 and 65 may be displaced to and fro parallel to the longitudinal axis 19.
  • a bracket 68 is connected to each of the holders 64 and 65, only the bracket 68 for the holder 65 being visible.
  • the brackets are each connected to a respective toothed belt 69 and 70 corresponding to holders 65 and 64, respectively the toothed belts are mounted on pulleys 71 and 72 rotatably mounted on the track rails 66, 67.
  • Each of the adjustment rings 17 and 18 (partly cut away for clarity in Fig. 12) are provided with lateral toothed portions 73 and 74, respectively, for engaging the teeth of toothed belts 69 and 70, respectively, so that rotation of ring 17 to and fro will cause displacement of toothed belt 69 to and fro, and rotation to and fro of ring 18 will cause displacement to and fro of toothed belt 70.
  • the lens holders 64 and 65 may be displaced to and fro along tracks 66 and 67 by rotation to and fro of rings 18 and 17, respectively.
  • the weight of the lenses, particularly the zoom lens 23 will tend to force the lens up or down from the desired and adjusted position, especially if vibration of the fixture takes place. This tendency can be curtailed or eliminated by introducing an inertia or braking in the displacement mechanism.
  • the displacement mechanism according to the invention is provided with a braking function that only is effective when displacement of the lens is not taking place, i.e. the braking function is only in force when the rings 17 or 18 are not being rotated.
  • the principles of the selective braking mechanism according to the invention and described in the following are of course also applicable in other applications where a displacement of an object with subsequent braking of the object in the displaced position is desirable.
  • the selective braking mechanism (Figs. 12-13) according to the invention comprises the pulley 71, a locking wheel 90, a friction washer 91, a friction spring 92, a locking washer 93 and a locking sled 94.
  • the spring 92 presses the locking wheel 90 and the friction washer 91 against the pulley 71 so as to create a suitable friction between the locking wheel 90 and the pulley 71.
  • the locking sled 94 is arranged between the two parallel lengths of the toothed belt and for displacement to and fro in the plane of said toothed belt 70 at perpendicularly to said two parallel lengths.
  • the locking sled is provided with locking teeth 94a and 94b for locking engagement with teeth at the rim of locking wheel 90 in a ratchet type action. If the locking sled 94 is in a central position, i.e. not displaced towards any of the two parallel lengths of the belt 70, then the locking teeth 94a and 94b will not engage the teeth of the locking wheel 90 so no friction brake is applied to the belt 70.
  • the dimension of the locking sled 94 perpendicular to the parallel lengths of the belt 70 is slightly longer than the distance the commone tangents of the pulleys 71 and 72 such that in the central position of the locking sled 94 sid locking sled will press against the parallel lengths of belt 70.
  • a selective braking mechanism is achieved whereby the brake effect is operative, when the weight of the lens tries to rotate the respective adjustment rings, but the brake effect is inoperative when rotation of the respective ring is carried out to displace the lens axially.
  • an electrical motor with a pinion for each ring may be arranged such that the teeth of the pinion mesh with the teeth on the rim of the respective ring.
  • the motors may for instance be firmly attached to the frame 6 or be spring biased so that any irregularities in the mounting of the rings and thereby the teethed rims may be taken up.
  • Magnetic markers may be attached to the rings such that a sensing means may sense the marker and thereby precisely identify the position of the respective ring as a basis for the subsequent rotation thereof to a new setting of the respective beam influencing means.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Diaphragms For Cameras (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)

Claims (7)

  1. Beleuchtungskörper (1) zur Projektion eines Lichtstrahls und zur Verwendung als Spotlight im Zusammenhang mit Theaterbühnen, Kinos und Fernsehstudios und ähnlichem, wobei der Beleuchtungskörper umfasst:
    eine Lichtquelle (20), welche sich an dem Ende eines Gehäuses (25) befindet, mit einer an der entgegengesetzten Seite desselben vorhandenen Lichtaustrittsblende (24), wobei die Lichtquelle und die Blende generell konzentrisch mit einer longitudinalen oder optischen Achse (19) des Gehäuses angeordnet sind;
    entsprechende Mittel (22,23,28-33) zur Beeinflussung des Strahls, welche ein oder mehr als ein, vorzugsweise vier, Strahlformungselement(e) (30-33) umfassen, und ebenfalls andere Mittel zur Beeinflussung des Lichtes wie beispielsweise eine oder mehrere Linse(n) und/oder eine Iris und/oder ein Muster beziehungsweise Gobo zur Beeinflussung eines Lichtstrahls, der von der Lichtquelle ausgeht und entlang des Weges des Lichtstrahls in Richtung der erwähnten longitudinalen Achse durch das Gehäuse von der Lichtquelle zur Blende verläuft, beinhalten; und
    Einstellmittel zur Justierung der Position von mindestens einer oder mehreren der erwähnten Strahlformungsklappe(n) und vorzugsweise jedem der erwähnten Lichtbeeinflussungsmittel, relativ zu der erwähnten longitudinalen Achse, wobei die erwähnten Einstellmöglichkeiten derart angeordnet sind, dass sie um die erwähnte longitudinale Achse rotieren können und diese mit entsprechenden Lichtbeeinflussungsmitteln verbunden sind, so dass eine Rotation um die erwähnte longitudinale Achse die Position der entsprechenden Lichtbeeinflussungsmittel relativ zur der erwähnten longitudinalen Achse justiert, dadurch gekennzeichnet dass diese Einstellmöglichkeiten einen ringförmigen Körper (7-18) beinhalten, der so angeordnet ist, dass die Achse desselben im Wesentlichen mit der erwähnten longitudinalen Achse (19) übereinstimmt und der über einen äußeren Rand der zur Aufbringung einer Rotationskraft verwendet werden kann, verfügt, wobei die Oberfläche des erwähnten Randes mit Mitteln zur Reibungsverstärkung versehen ist.
  2. Beleuchtungskörper nach Anspruch 1, weiter umfassend einen oder mehrere Elektromotoren, die mit einem entsprechenden Antriebsrad, welches mit dem erwähnten äußeren Rand eines entsprechenden ringförmigen Körpers die Aufbringung einer Rotationskraft ermöglicht, verbunden sind.
  3. Beleuchtungskörper nach Anspruch 2, wobei das Antriebsrad ein Zahnrad ist und der entsprechende äußere Rand, ausgestattet mit einem entsprechenden Zahnrad, über Zähne, die mit den Zähnen des erwähnten Zahnrades ineinander greifen, wenn das erwähnte Zahnrad rotiert, verfügt.
  4. Beleuchtungskörper nach einem der Ansprüche 1-3, wobei der ringförmige Körper über ein Mittel zur Positionsbestimmung für die Ermittlung der Winkelposition des ringförmigen Körpers relativ zu der erwähnten longitudinalen Achse verfügt.
  5. Beleuchtungskörper nach Anspruch 4, wobei das Mittel zur Positionsbestimmung ein Element, welches ferngesteuert abgetastet werden kann, enthält und wobei dieser Körper darüber hinaus über ferngesteuerte Abtastmöglichkeiten zur Abtastung der Winkelposition des erwähnten Elementes in Relation zu der besagten longitudinalen Achse verfügt.
  6. Beleuchtungskörper nach einem der vorhergehenden Ansprüche, wobei die Einstellmöglichkeiten für die oder jede der Strahlformungsklappe(n) über ein radiales Justierungsmittel zur radialen Justierung der Position der Klappe relativ zu der erwähnten Achse, sowie über umlaufend angeordnete Justierungsmittel zur peripheren Justierung der erwähnten Klappen um die besagte Achse herum verfügt, und wobei das radiale Justierungsmittel zwei benachbarte konzentrische ringförmige Körper oder Ringe enthält, wobei jeder mit einem Punkt der Klappe verbunden ist, so dass die relative Rotation zweier Ringe die radiale Position der Klappe verändert.
  7. Beleuchtungskörper nach Anspruch 6, wobei die Klappe über einen Körper, der generell schräg zur der erwähnten Achse herausragt und zwei Arme, welche generell parallel zur erwähnten Achse herausragen, verfügt, wobei jeder der Arme Gleitverbindungsmittel zur Verbindung des jeweiligen Arms mit jedem der Ringe, in der Art, dass diese gleitend in eine Führungsschiene in jedem der erwähnten Ringe aufgenommen werden, enthält.
EP01929333A 2000-05-03 2001-05-02 Leuchte Expired - Lifetime EP1409920B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DKPA200000731 2000-05-03
DK200000731 2000-05-03
PCT/DK2001/000299 WO2001084043A1 (en) 2000-05-03 2001-05-02 A lighting fixture

Publications (2)

Publication Number Publication Date
EP1409920A1 EP1409920A1 (de) 2004-04-21
EP1409920B1 true EP1409920B1 (de) 2007-06-20

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EP01929333A Expired - Lifetime EP1409920B1 (de) 2000-05-03 2001-05-02 Leuchte

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EP (1) EP1409920B1 (de)
JP (1) JP3894796B2 (de)
CN (1) CN1200218C (de)
AT (1) ATE365297T1 (de)
AU (2) AU5614501A (de)
CA (1) CA2407982C (de)
DE (1) DE60129048T2 (de)
HK (1) HK1056007A1 (de)
WO (1) WO2001084043A1 (de)

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FR2838808B1 (fr) 2002-04-23 2005-01-14 Jacques Biehlmann Projecteur muni d'un nez specifique de reglage du faisceau lumineux et nez mis en oeuvre
DE10241899B4 (de) * 2002-09-06 2006-06-29 Adb-Ttv Technologies N.V./S.A. Beleuchtungsvorrichtung
ATE484710T1 (de) 2004-04-02 2010-10-15 Martin Professional As Lichtquellenmodul
DK200700310A (en) 2006-09-08 2008-03-09 Martin Professional As Silent moving head projector
US20100014296A1 (en) * 2008-07-16 2010-01-21 Chuang Ping Han Light distribution board having gratings with multiple focuses
IT1391569B1 (it) * 2008-09-05 2012-01-11 Clay Paky Spa Proiettore da palcoscenico
DK201000114A (en) * 2009-09-11 2011-03-12 Martin Professional As Light Effect System with Rotatable Light Forming Means
WO2011029448A1 (en) * 2009-09-11 2011-03-17 Martin Professional A/S Light fixture with rotatable beam framing
JP5177117B2 (ja) * 2009-10-16 2013-04-03 日本放送協会 照明装置
CN102192417A (zh) * 2010-03-01 2011-09-21 亿光电子工业股份有限公司 光源模组与灯具
IT1403592B1 (it) * 2010-12-21 2013-10-31 Clay Paky Spa Proiettore da palcoscenico
DE102011007131A1 (de) * 2011-04-11 2012-10-11 Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg Vorrichtung zum Verstellen eines im Gehäuse eines Scheinwerfers oder optischen Geräts angeordneten optischen Tubus
WO2013033861A1 (zh) * 2011-09-05 2013-03-14 Liu Jiang 聚光灯
ITMI20121060A1 (it) * 2012-06-18 2013-12-19 Clay Paky Spa Proiettore da palcoscenico per variare l'uniformita' di concentrazione del fascio luminoso e metodo per operare detto proiettore da palcoscenico
HUE035474T2 (hu) * 2015-02-16 2018-05-02 D T S Illuminazione S R L Fénysugarak vetítõgépe
WO2016190453A1 (ko) * 2015-05-22 2016-12-01 주식회사 에시티큐브 자유로운 색온도 변환이 가능한 led 램프 및 이를 이용한 led 램프의 색온도 변환 방법
CN105042382A (zh) * 2015-08-11 2015-11-11 宁波金熠光电科技有限公司 一种led变焦成像灯
CN105716035A (zh) * 2016-03-21 2016-06-29 侯绪华 带遥控的能够声图互动的气氛灯
CN105927871A (zh) * 2016-05-24 2016-09-07 江苏天楹之光光电科技有限公司 一种led灯具四边形光斑成型装置
US10119676B2 (en) * 2016-06-10 2018-11-06 Osram Gmbh Lighting device, corresponding lamp and method
US11611730B2 (en) * 2020-02-11 2023-03-21 Brian Robert Moon Modular LED imaging projector and optical systems
CN118375872A (zh) * 2024-06-25 2024-07-23 江苏科学梦创展科技有限公司 一种物件展览用智能照明装置

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US6092914A (en) * 1998-06-22 2000-07-25 Electronics Theatre Controls Zoom lighting fixture having multifunction actuator

Also Published As

Publication number Publication date
JP3894796B2 (ja) 2007-03-22
CN1200218C (zh) 2005-05-04
CA2407982A1 (en) 2001-11-08
AU5614501A (en) 2001-11-12
AU2001256145B2 (en) 2004-11-18
WO2001084043A1 (en) 2001-11-08
CA2407982C (en) 2009-01-06
DE60129048T2 (de) 2008-02-28
ATE365297T1 (de) 2007-07-15
HK1056007A1 (en) 2004-01-30
DE60129048D1 (de) 2007-08-02
EP1409920A1 (de) 2004-04-21
JP2003532271A (ja) 2003-10-28
CN1432117A (zh) 2003-07-23

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