WO2023148657A1 - Appareil d'éclairage pour la production d'effets de scène et procédé d'actionnement dudit appareil d'éclairage - Google Patents

Appareil d'éclairage pour la production d'effets de scène et procédé d'actionnement dudit appareil d'éclairage Download PDF

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Publication number
WO2023148657A1
WO2023148657A1 PCT/IB2023/050921 IB2023050921W WO2023148657A1 WO 2023148657 A1 WO2023148657 A1 WO 2023148657A1 IB 2023050921 W IB2023050921 W IB 2023050921W WO 2023148657 A1 WO2023148657 A1 WO 2023148657A1
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WO
WIPO (PCT)
Prior art keywords
main reflector
light fixture
light
reflector
light source
Prior art date
Application number
PCT/IB2023/050921
Other languages
English (en)
Inventor
Alberto Alfier
Aris QUADRI
Renato Frison
Marco Angelini
Davide FERRATI
Original Assignee
Clay Paky S.P.A.
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 Clay Paky S.P.A. filed Critical Clay Paky S.P.A.
Publication of WO2023148657A1 publication Critical patent/WO2023148657A1/fr

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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
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F21V7/0033—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0085—Means for removing heat created by the light source from the package
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/24—Lazy-tongs
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements

Definitions

  • the present invention relates to a light fixture for producing scenic effects and to a method for operating said light fixture .
  • the light fixtures of the type identi fied above are used in the entertainment sector for creating scenic ef fects by means of plays of light .
  • Suitable cooling systems can however increase the overall bulk of the light fixture and/or have di f ficulty in integrating in a structure , already complex in itsel f and comprising one or more beam processing elements . Summary
  • an obj ect of the present invention i s to manufacture a light fixture of the type identi fied above , capable of generating innovative scenic ef fects by means of the use of high power light beams and which is exempt from the drawbacks of the prior art .
  • the present invention relates to a light fixture extending along a longitudinal axis and configured to produce scenic ef fects ; the light fixture comprising :
  • At least one main reflector which is supported by the frame and has a concave and at least partly reflective surface ;
  • the source assembly supported by the frame and configured to generate at least one light beam to illuminate the surface of the main reflector ;
  • the source assembly comprising at least one first linear light source arranged outside the inner volume o f the main reflector ; the light fixture being configured so that the relative distance between the main reflector and the at least one linear light source is variable .
  • a further obj ect of the present invention is to provide a method for operating said light fixture .
  • the present invention relates to a method for operating a light fixture as claimed in claim 19 .
  • FIG. 1 is a perspective view of the light fixture according to the present invention.
  • FIG. 2 is a section view along plane I I of the light fixture of Figure 1 in a first operating position
  • FIG. 3 is a section view along plane I I of the light fixture of Figure 1 in a second operating position
  • FIG. 4 is a section view along plane I I of the light fixture of Figure 1 in a third operating position
  • FIG. 5 is a section view, with parts removed for clarity, of a detail of Figure 4 ;
  • FIG. 6 is a schematic perspective view, with parts removed for clarity, of a detail of the light f ixture of Figure 1 in a first operating configuration
  • FIG. 7 is a schematic perspective view, with parts removed for clarity, of a detail of the light f ixture of Figure 1 in a second operating configuration
  • Figure 8 is a top schematic view, with parts removed for clarity, of a detail of Figure 6 ;
  • FIG. 9 is a top schematic view, with parts removed for clarity, of the detail of Figure 6 in accordance with an alternative embodiment ;
  • FIG. 10 is a schematic representation of the optical path of the light radiations in the light fixture according to the present invention .
  • reference numeral 1 indicates a light fixture .
  • the light fixture 1 is preferably used, alone or in combination with other light fixtures ( identical or also of di f ferent type ) , within the entertainment field for generating light ef fects and plays of light .
  • the light fixture 1 extends along a longitudinal axis A and comprises a frame 2 , at least one main reflector 3 (better visible in Figures 2 -4 ) supported by the frame 2 and comprising a concave and at least partly reflective surface 4 , at least one source assembly 6 supported by the frame 2 and comprising at least one linear light source 7 (visible in Figure 2 ) and arranged externally to the inner volume defined by the main reflector 3 and towards which the surface 4 is faced .
  • the light fixture 1 is configured such that the relative distance between the main reflector 3 and the at least one linear light source 7 is variable .
  • one of the main reflector 3 and the at least one linear light source 7 is movable .
  • the frame 2 is configured to define a main chamber 8 , provided with an inner base 9 and with at least one side wall 10 which surrounds the inner base 9 .
  • the frame 2 is configured to also define a bottom chamber 12 provided with an outer base 13 and with at least one side wall 14 which surrounds the outer base 13 .
  • the inner base 9 and the outer base 13 have a quadrangular shape and are surrounded by four side walls 10 and 14 , respectively .
  • the bottom chamber 12 is closed at the top by the inner base 9 .
  • the inner base 9 defines the roof of the bottom chamber 12 .
  • the inner base 9 is provided with two openings 15 (only one of which is visible in Figure 2 ) .
  • two opposite walls 10b of the four side walls 10 of the main chamber 8 are made in one piece with respective two opposite walls 14b of the four side walls of the bottom chamber 12 ( see also Figure 1 in which the walls 14a and 14b are visible externally) , the other opposite walls 10a are preferably separated from the remaining opposite walls 14a .
  • the walls 10a are arranged parallel to the longitudinal axis A, whereas the walls 10b are arranged orthogonal to the longitudinal axis A.
  • the side walls 10b extend beyond the side walls 10a for providing support to possible further elements of the l ight fixture 1 ( as it will be speci fically evident in the following) .
  • the main reflector 3 preferably movable , is arranged in the main chamber 8 .
  • a moving device 16 is at least partly housed, configured to move the main reflector 3 , as it will be speci fically evident in the following .
  • the separation into a main chamber 8 and a bottom chamber 12 allows selectively intervening on the elements housed in one of the chambers without running the risk of accidentally damaging the elements contained in the other chamber of the two chambers .
  • a variation not illustrated provides for the frame to define one single chamber .
  • the main reflector 3 comprises a wall 17 provided with the surface 4 .
  • the wall 17 extends along a direction parallel to the longitudinal axis A and is shaped such that the surface 4 is , as already mentioned, concave .
  • the wall 17 is shaped such that the surface 4 is a portion of a cylindrical surface .
  • a curvature having a cylindrical symmetry determines an exiting elongated beam .
  • the surface 4 can be completely reflective (for example completely shiny) or can comprise reflective parts and non-ref lect ive parts (for example textured or facetted) . Further variations provide for the surface 4 to be anisotropically reflective so as to proj ect a speci fic configuration .
  • the main reflector 3 is housed in the main chamber 8 and is movable along a direction C orthogonal to the longitudinal axis A between a collimated beam position, al so called NARROW ( illustrated in Figure 3 ) and a divergent beam position, also cal led WIDE ( illustrated in Figure 4 ) .
  • a collimated beam position al so called NARROW ( illustrated in Figure 3 )
  • a divergent beam position also cal led WIDE ( illustrated in Figure 4 )
  • the main reflector 3 In the collimated beam position the main reflector 3 is arranged distal to the at least one linear light source 7 , whereas in the divergent beam position the main reflector 3 is arranged proximal to the at least one linear light source 7 .
  • the distance between the main reflector 3 and the linear light source 7 is maximum, whereas in the divergent beam position, the distance between the main reflector 3 and the linear beam source 7 is minimum .
  • the main reflector 3 is arranged in an intermediate position between the divergent beam position and the collimated beam position .
  • the movement of the main reflector 3 determines a variation of the opening of the light beam emitted by the light fixture 1 .
  • the main reflector 3 is moved by a moving device 16 , which is preferably at least partly housed in the bottom chamber 12 .
  • the operation of the moving device 16 is preferably adj usted by a control device (not visible in the accompanying figures ) .
  • the control device can also be managed remotely, preferably by means of communications with DMX protocol .
  • the operation of the moving device is manual .
  • the moving device 16 comprises an articulated transmission system 19 , a support plate 20 coupled to the main reflector 3 and an actuator device 21 .
  • articulated transmission system means a transmission system de fined by a plurality of bodies , preferably levers or bars , mutually bound by means of spherical or cylindrical hinges .
  • the articulated transmission system 19 comprises two pairs of levers 24 articulated to each other .
  • the pairs of levers 24 are arranged spaced apart from each other and are coupled to respective portions of the reflector 3 .
  • Each lever 24 is provided with an end 27 coupled to the support plate 20 in a rotatable manner, and with an end 28 coupled to the actuator device 21 in a rotatable manner .
  • the levers 24 are articulated to each other by means of a pin 25 .
  • the pin 25 is a pivot pin provided with a bearing (not visible in the accompanying figures ) , which engages a circular hole 29 of one lever 24 and a shaped eyelet 30 of the other lever 24 .
  • the eyelet 30 is shaped so as to guide the movement of the pin 25 during the relative movement of the levers 24 for li fting and lowering the support plate 20 ( and thus the main reflector 3 coupled thereto ) .
  • the eyelet 30 is shaped so as to contain the pin 25 for binding the levers 24 together, ensuring the perpendicularity of the reflector 3 with respect to the direction C during the movement between the WIDE and NARROW positions .
  • the actuator device 21 comprises two carriages 31 , at least one guide 32 , at least one motor 33 for moving the carriages 31 and a transmission device 34 configured to transmit motion from the motor 33 to the carriages 31 .
  • the guide 32 and the motor 33 are fixed to the frame 2 .
  • the guide 32 and the motor 33 are fixed to the inner base 9 .
  • One lever 24 of each pair of levers 24 has the end 28 coupled to a carriage 31
  • the other lever 24 of the pair has the end 28 coupled to the other carriage 31 .
  • the carriages 31 are slidable along the guide 32 between a first position in which the carriages 31 are arranged distal to each other ( Figure 7 ) and a second position in which the carriages 31 are arranged proximal to each other ( Figure 6 and Figure 8 ) .
  • the movement of the carriages 31 is a mutual moving away movement in the passage from the second position to the first position and a mutual approaching movement in the passage from the first position to the second position .
  • the support plate 20 coupled to the main reflector 3 lowers approaching the reflector 3 to the collimated beam position (NARROW - Figure 3 )
  • the support plate 20 li fts approaching the main reflector 3 to the divergent beam position (WIDE - Figure 4 ) .
  • the guide 32 along which the carriages 31 slide extends along a direction substantially parallel to the longitudinal axis A.
  • the guide 32 is defined by at least one support element 35 , which slidably engages respective through-holes 36 of the carriages 31 .
  • the guide 32 comprises two support elements 35 , arranged parallel , which slidably engage respective holes 36 of the carriages 31 .
  • the support elements 35 define a track on which the carriages 31 slide .
  • the motor 33 is an electric motor, preferably of the stepper type .
  • the transmission device 34 is configured to transmit motion from the motor 33 to the carriages 31 and comprises at least one screw 40 moved, directly or indirectly, by the shaft of the motor 33 and coupled to the carriages 31 .
  • the transmission device 34 comprises two threaded screws 40a 40b having the same thread direction ( see also Figure 8 ) .
  • the screw 40a engages respective through-holes 42a of the carriages 31 .
  • the through-holes 42a are aligned with each other .
  • the screw 40b engages respective through-holes 42b of the carriages 31 .
  • the through-holes 42b are aligned with each other .
  • both screws 40a 40b are arranged between the support elements 35 of the guide 32 .
  • At least one of the through-holes 42a of one carriage 31 is provided with a nut screw 43a ( inside the carriage and not completely visible in the accompanying figures ) configured to mesh with the screw 40a .
  • At least one of the through-holes 42b of the other carriage 31 is provided with a nut screw 43b ( inside the carriage and not completely visible in the accompanying figures ) configured to mesh with the screw 40b .
  • the screws 40a 40b are provided with respective ends 44a 44b, which are coupled to each other by means of respective gear wheels 45a 45b .
  • the coupling by means of the gear wheels 45a 45b allows the transmission of the rotation movement from one screw to the other .
  • the rotation movement of the screws is opposite .
  • the movement of the screws 40a 40b determines the movement of the carriages 31 as is clearly illustrated in Figure 8 .
  • the transmission device 34 further comprises a belt 46 , which transmits the motion of the shaft 47 of the motor 33 to one of the screws 40a 40b .
  • the belt 46 connects the shaft 47 with the screw which is closer to the shaft 47 ( in the nonlimiting example described and illustrated herein it corresponds to the screw 40b ) .
  • the rotation of the shaft 47 of the motor 33 determines a rotation in the same direction of the screw 40b and a consequent rotation, in oppos ite direction, of the screw 40a as is illustrated in Figure 8 .
  • the moving device 16 is preferably at least partly housed in the bottom chamber 12 .
  • the actuator device 21 is housed in the bottom chamber 12 of the frame 2 , the pairs of levers 24 pass through the openings 15 of the inner base 9 and the support plate 20 coupled to the main reflector 3 is arranged in the main chamber 8 .
  • the motor 33 is fixed to the inner base 9 along the surface which faces the bottom chamber 12 and the support elements 35 of the guide 32 are coupled to supports 39 which are also fixed to the surface of the inner base 9 which faces the bottom chamber 12 .
  • Figure 9 schematically illustrates a variation of the transmission device 34 , which comprises one single screw 40 , which is divided into a portion 48a with a thread direction and a portion 48b with an opposite thread direction .
  • the carriages 31 are provided with holes 42 for the passing of the screw 40 and are both provided with nut screw (not illustrated) configured to mesh with the respective threaded portion of the screw 40 .
  • the screw 40 can be moved directly or indirectly (for example by means of belt not illustrated) .
  • the source assembly 6 is supported by the frame 2 and comprises at least one linear light source 7 and is arranged externally to the inner volume defined by the main reflector 3 and towards which the surface 4 is faced .
  • the linear light source 7 is preferably coupled to the side wall 10 which surrounds the inner base 9 of the main chamber 8 of the frame 2 .
  • the frame 2 comprises four side walls 10
  • it comprises two linear light sources 7 arranged on opposite walls 10a of the frame 2 .
  • the linear light sources 7 are both external to the inner volume defined by the main reflector 3 .
  • linear light sources 7 are fixed to the opposite walls 10a along the inner surface 50 which faces the main chamber 8 .
  • the linear light sources 7 face the main chamber 8 in which the main reflector 3 is arranged .
  • the linear light sources 7 are rectilinear and extend along a respective longitudinal axis Bl , B2 parallel to the longitudinal axis A.
  • the linear light sources 7 extend along the entire axial length of the respective wal l 10a to which they are coupled .
  • the linear light sources 7 are substantially identical .
  • each linear light source 7 comprises a plurality of light elements 51 aligned along the direction of extension of the linear light source .
  • the light elements 51 are arranged equally distant from each other .
  • each light element 51 is preferably configured to generate light radiations of di fferent colour .
  • Each light element 51 is controllable in an independent manner by a control device (not illustrated) .
  • the control can be carried out also remotely .
  • control can provide for the activation/ turning of f of the high frequency light elements 51 so as to obtain stroboscopic ef fects or a variation of the colours and of the intensities of the light elements 51 .
  • each light element 51 comprises four LEDs of the RGBW (Red Green Blue White ) type .
  • a variation not illustrated provides for arranging light elements comprising single LEDs having di f ferent emission spectrum . In other words , the LEDs having di f ferent emission spectrum are next to each other so as to form the linear light source .
  • the light source can comprise light elements with single LEDs in sequence according to the following pattern R-G-B-W-R-G-B-W-R-G-B-W ....
  • the LEDs can be arranged on at least two parallel rows .
  • the source assembly 6 further comprises a cooling device 52 , which is arranged in the proximity of the linear light source 7 and is configured to dissipate the heat generated by the linear light source 7 .
  • the cooling device 52 is a passive cooling device and comprises two f inned dissipating elements 53 (normally defined heat sinks ) , which are fixed along the outer surface of the walls 10a of the frame 2 which support the linear light sources 7 .
  • the walls 10a of the frame 2 support on one side the linear light source 7 and on the opposite side a respective dissipating element 53 .
  • the structure of the light fixture 1 thus allows having linear light sources 7 suf ficiently close to the respective dissipating element 53 . This allows using high power linear light sources 7 without running risks of overheating .
  • each dissipating element 53 is defined by a base 54 , from which a plurality of cooling fins 56 protrude , preferably parallel to each other .
  • the base 54 is coupled to the wall 10a of the frame 2 .
  • the cooling fins 56 are also preferably parallel to the longitudinal axis A.
  • the cooling device 52 is preferably made of die-cast or extruded metal .
  • the cooling device is of active type and comprises air cooling fans or diaphragms .
  • the dissipating elements 53 are fixed to the walls 10b of the frame 2 , in addition to the side walls 10a, as is illustrated in Figure 1 .
  • the dissipating elements 53 have an axial length (understood as the length measured along the axis A) equal to at least the axial length of the linear light source 7 which they have to cool .
  • the source assembly 6 comprises at least one light guide 60 associated with the at least one linear light source 7 .
  • the light guide 60 is coupled to the at least one linear light source 7 so as to collect the light beam emitted by the linear light source 7 and define a determined optical path .
  • the source assembly 6 comprises two light guides 60 , each of which is associated with a respective linear light source 7 .
  • the source assembly comprises one single light guide , configured to collect the light beams from one or more linear light sources and define , for the collected beams , a determined optical path .
  • the light guides 60 are substantially identical and are planar .
  • the light guides 60 extend along a respective plane .
  • the light guides 60 extend along a same plane Z substantially orthogonal to the direction C and are configured to substantially close the main chamber 8 .
  • the plane Z is arranged along the focal line of the main reflector 3 when the reflector is in the NARROW position .
  • the plane Z is arranged along the focal line of the main reflector 3 when the reflector 3 is arranged distal to the at least one linear light source 7 , i . e . when the distance between the reflector 3 and the at least one linear light source 7 is maximum .
  • Focal line means the line containing the focal points identi fied by each section of the reflector 3 along a plane orthogonal to the longitudinal axis A.
  • each light guide 60 is defined by a plate having a determined thickness (measured orthogonally to the plane on which the light guide extends ) , which is provided with an edge 62 , with an inner wall 63 (which faces , in use , the main reflector 3 ) and an outer wall 64 (which faces , in use , the zone external to the light fixture 1 ) .
  • the edge 62 has a quadrangular shape and is supported, preferably on at least two sides (preferably three ) , by the frame 2 .
  • the frame 2 has along the walls 10a and 10b grooves 65a 65b suf ficiently deep for allowing the housing of a portion of the edge 62 suf ficient to ensure a stable support of the light guide 60 .
  • the linear light sources 7 are preferably housed .
  • the linear light sources 7 are not visible from the outside .
  • the light guide 60 is provided, along the edge 62 , with at least one input side 67 , which faces the respective linear light source 7 , and at least one output side 68 , which is arranged on an opposite side with respect to the input side 67 .
  • the edge 62 comprises two resting sides 69 , which engage the grooves 65b of the walls 10b of the frame 2 .
  • the inner wall 63 and the outer wall 64 are arranged parallel .
  • the inner wall and the outer wall can be inclined with a divergence towards the output side 68 .
  • the input side 67 is arranged at a distance with respect to the respective linear light source 7 less than a threshold value so as to collect most of the light radiations emitted by the linear light source 7 .
  • the input side 67 extends orthogonal to the inner wall 63 and to the outer wall 64 .
  • the output side 68 is preferably inclined with respect to the inner wall 63 and to the outer wall 64 .
  • the output side 68 forms an acute angle with the inner wall 63 .
  • the inclination of the output side 68 can be suitably adj usted so as to optimi ze the redirecting of the light radiations towards the main reflector 3 .
  • the output side 68 is coupled to a further reflector 70 .
  • the further reflector 70 in particular, is provided with two reflective sides 71 inclined and convergent to one another so as to form between each other an angle a .
  • Each reflective side 71 faces a respective output side 68 of the light guide 60 .
  • the reflective side 71 is arranged in contact with the output side 68 of the light guide 60 and substantially has the same inclination of the respective output side 68 .
  • the further reflector 70 is arranged along the plane Z and extends along a direction parallel to the longitudinal axis A.
  • the further reflector 70 is supported by the frame 2 .
  • the further reflector 70 extends from one side wall 10b to the other and is fixed to the side walls 10b .
  • the further reflector 70 is arranged between the light guides 60 in contact with the output sides 68 of the light guides 60 .
  • Each light guide 60 is configured such that the inner wall 63 and the outer wall 64 are transparent to radiations coming from the main reflector 3 and are reflective , by total internal reflection ( TIR) , for light radiations entering through the input side 67 and exiting through the output side 68 , as is illustrated in Figure 10 .
  • TIR total internal reflection
  • the light guides 60 are thus made of a transparent material .
  • the light guides 60 are made of glass .
  • a layer of reflective material is arranged, for example isotropic reflective silver aluminium .
  • the source assembly 6 preferably also comprises a di f fuser element 77 (represented by a dashed line in Figures 3 and 4) , which is arranged at the output of the further reflector 70.
  • the diffuser element 77 comprises a plano-convex longitudinal lens.
  • plano-convex longitudinal lens when present, contributes towards making the light radiation exiting the light guide 60 converge towards the reflector 3, increasing the overall optical efficiency.
  • the diffuser element can comprise a layer of diffusive material coupled to the inner walls 63 of the light guides 60 or can comprise a diffuser body to which also a lens is coupled.
  • the diffuser element can have a different diffusive structure depending on the needs (isotropic, elliptical, prismatic, etc.)
  • the light radiations emitted by the linear light sources 7 are guided through the respective light guides 60 towards the further reflector 70, which reflects them towards the main reflector 3.
  • the light rays which strike the main reflector 3 pass through the light guides 60 and are projected towards the outside of the light fixture 1 originating a light beam.
  • the diffuser element 77 can generate a controlled diffusion so as to obtain a beam with a controlled blending effect particularly useful in the projection of coloured light beams .
  • the movement of the main reflector 3 between the collimated beam position, also called NARROW (illustrated in Figure 3) and the divergent beam position, also called WIDE (illustrated in Figure 4) determines a variation of the amplitude of the projected beam (as is highlighted in the schematic representations of Figures 3 and 4) .
  • the beam exit angle (indicated by p in the accompanying figures) can vary from a minimum of 5° ( Figure 3) to a maximum of 70° ( Figure 4) .
  • the light guides 60 in addition to substantially collecting all the light radiations emitted by the linear light sources 7 and conveying them towards the further reflector 70 and then towards the main reflector 3, have a protective and closing function of the main chamber 8 in which the main reflector 3 is housed.

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

Abstract

Un appareil d'éclairage (1) s'étend le long d'un axe longitudinal (A) et est configuré pour produire des effets de scène; l'appareil d'éclairage (1) comprend : un cadre (2); au moins un réflecteur principal (3), qui est supporté par le cadre (2) et présente une surface concave et au moins partiellement réfléchissante (4); un ensemble source (6) supporté par le cadre (2) et configuré pour générer au moins un faisceau lumineux pour éclairer la surface (4) du réflecteur principal (3); l'ensemble source (6) comprenant au moins une première source de lumière linéaire (7) agencée à l'extérieur du volume interne du réflecteur principal (3); l'appareil d'éclairage étant configuré de sorte que la distance relative entre le réflecteur principal (3) et l'au moins une source de lumière linéaire (7) est variable.
PCT/IB2023/050921 2022-02-03 2023-02-02 Appareil d'éclairage pour la production d'effets de scène et procédé d'actionnement dudit appareil d'éclairage WO2023148657A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9109267U1 (de) * 1991-07-26 1991-10-31 Siemens AG, 8000 München Indirekte Spiegelleuchte
WO2015187448A1 (fr) * 2014-06-02 2015-12-10 Quarkstar Llc Système d'éclairage pourvu de plusieurs modules de luminaire à guide de lumière
EP3176496A1 (fr) * 2015-12-04 2017-06-07 CLAY PAKY S.p.A. Dispositif d'éclairage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9109267U1 (de) * 1991-07-26 1991-10-31 Siemens AG, 8000 München Indirekte Spiegelleuchte
WO2015187448A1 (fr) * 2014-06-02 2015-12-10 Quarkstar Llc Système d'éclairage pourvu de plusieurs modules de luminaire à guide de lumière
EP3176496A1 (fr) * 2015-12-04 2017-06-07 CLAY PAKY S.p.A. Dispositif d'éclairage

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