WO2009114632A1 - Système optique pour projecteur à effet aquatique - Google Patents

Système optique pour projecteur à effet aquatique Download PDF

Info

Publication number
WO2009114632A1
WO2009114632A1 PCT/US2009/036842 US2009036842W WO2009114632A1 WO 2009114632 A1 WO2009114632 A1 WO 2009114632A1 US 2009036842 W US2009036842 W US 2009036842W WO 2009114632 A1 WO2009114632 A1 WO 2009114632A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical
optical element
optical system
screen
light
Prior art date
Application number
PCT/US2009/036842
Other languages
English (en)
Inventor
Pavel Jurik
Original Assignee
Robe Lighting Inc
Robe Lighting Sro
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
Priority claimed from US12/075,467 external-priority patent/US20080247025A1/en
Priority claimed from US12/075,466 external-priority patent/US20080247024A1/en
Application filed by Robe Lighting Inc, Robe Lighting Sro filed Critical Robe Lighting Inc
Priority to EP09720590A priority Critical patent/EP2255127A1/fr
Publication of WO2009114632A1 publication Critical patent/WO2009114632A1/fr

Links

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
    • F21V14/08—Controlling the distribution of the light emitted by adjustment of elements by movement of the screens or filters
    • 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
    • F21S10/02—Lighting devices or systems producing a varying lighting effect changing colors
    • 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
    • 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 generally relates to optical systems. More specifically optical systems in a light beam producing luminaire, particularly for a wash light and even more specifically to a variable beam angle wash light system which provides an improved range of beam angles and efficient light output.
  • Luminaires used in the entertainment industry can typically be broadly categorized into two main categories each with differing optical properties.
  • the two categories are imaging and non-imaging.
  • the imaging type (commonly known as spot lights) are designed to project a focused image of a pattern or stencil or are provided with a shutter system to allow sharp cut-off of the light to stop it impinging on a curtain or other areas of the stage. They are also often used to provide accent lighting to a well defined area of the scene.
  • the non-imaging type typically produces a soft-edged diffuse beam often used for general illumination and to provide background lighting and color.
  • the present invention is concerned with the latter nonimaging category, often known as wash lights.
  • a very common system uses a spherical reflector with a light source mounted at the optical centre of the reflector. The combination of the direct and reflected light is passed through a single positive lens. The separation between the light source /reflector combination and the lens is variable to control the divergence of the output beam.
  • Such systems are capable of a large range of adjustment of the output beam angle but are highly inefficient systems, particularly at narrow beam angles where much of the light from the light source and reflector completely misses the output lens.
  • a further prior art system is disclosed in US Patent 5,515,254 to Smith et al.
  • the beam angle divergence is controlled through the use of an iris or variable sized aperture.
  • a system provides significantly reduced output at narrow beam angles as much of the light is blocked or vignetted by the iris.
  • a yet further prior art system is disclosed in US Patent 6,282,027 to Hough which suggests using an ellipsoidal reflector and a pair of matched lenses, one with positive focal length and one with negative focal length to change the beam divergence. As with the systems above this produces an undesirable high intensity in the beam centre, or hot-spot particularly when used at narrow beam divergence.
  • the present invention generally relates to an optical system for a wash light and specifically to a variable beam angle system which provides an improved range of beam angles and efficient light output.
  • the present invention includes two optical elements whose spacing may be varied.
  • the first optical element has a central aperture which may be occluded by a diffusing element.
  • the extent of the occlusion of the central aperture is coupled to the mechanism for changing the separation of the optical elements.
  • the second optical element remains fixed while the first optical element and its associated diffusing element are linked and move as a pair to adjust the separation between the two optical elements.
  • the diffusion element comprises two semicircular diffusers each attached to pivot arms such that in a first limit position the semicircular diffusers are completely outside the aperture in the first optical element and in a second limit position the semicircular diffusers completely occlude the aperture in the first optical element.
  • the semicircular diffusers may be frosted glass.
  • FIGURE 1 illustrates a plan optical axis view of an embodiment of the present invention configured for minimum beam divergence
  • FIGURE 2 illustrates a plan optical axis view of an embodiment of the present invention configured for maximum beam divergence
  • FIGURE 3 illustrates a perspective view of a first optical element and a diffusing elements in a first limit configuration
  • FIGURE 4 illustrates a perspective view of the first optical element and the diffusing element in a second limit configuration
  • FIGURE 5 illustrates a diagram of an exemplar coupling relationship between the movement of the optical elements and the closing configuration of the diffusing elements
  • FIGURE 6 illustrates a further diagram of the coupling relationship between the movement of the optical elements, the closing of the diffusing elements and the opening of the opaque iris aperture
  • FIGURE 7 illustrates a plan optical axis view of an alternative embodiment of the present invention positioned for minimum beam divergence
  • FIGURE 8 illustrates a plan optical axis view of an alternative embodiment of the present invention positioned for minimum beam divergence
  • FIGURE 8 illustrates
  • the present invention generally relates to an optical system for a luminaire for producing a light beam.
  • the optical system is particularly used for a category of luminaire known as a wash light and specifically to a variable beam angle wash light which provides an improved range of beam angles balanced with size and efficient light output.
  • Figure 1 illustrates a plan view along the optical axis of the optical path of an embodiment of the present invention.
  • the optical elements are shown in a configuration which provides for minimum beam divergence (a narrow beam angle).
  • the embodiment illustrated in Figure 1, including the lamp, employs the use of six optical elements.
  • the first element, a lamp 2 provides the light source which is positioned close to the first focus of elliptical reflector 1, the second optical element so as to produce a light beam 3.
  • the light beam 3 will converge towards the second focus of the elliptical reflector down the optical axis.
  • Persons skilled in the art will appreciate that alternative embodiments may employ other elements to generate a generally focused light beam.
  • the third optical element an opaque aperture plate 10
  • the plate is opaque so as to provide a controlled light beam by eliminating spill or stray light.
  • the diameter of light beam 3 will be at a minimum. In one embodiment upon which the illustration of Figure 1 is based this diameter is between 30 mm and 50mm..
  • the opaque aperture plate may be articulatable so that it varies the size and or shape of the aperture.
  • a variable diameter iris with a circular aperture is employed.
  • other variable shape or size mechanism may also be employed.
  • the fourth optical element 7 and fifth optical element 4 are configured adjacent to the opaque aperture 10 in a rear limit position close to the second focus of reflector 1.
  • the fourth optical element is a variable diffuser 7 described in greater detail below. In the rear, minimal beam divergence configuration the variable diffuser is not in the path of the light beam 3.
  • the fifth optical element 4 may be formed of a positive or negative lens, a fresnel lens. Diffusion glass a lenticular lens or other lens type known in the art to modulate the beam angle of the light beam passing through the opaque aperture plate 10. .
  • the fifth optical element and the sixth optical element acting together may form a two element zoom lens system where the beam angle of the resultant output beam is controlled by the separation of the fifth and sixth optical elements.
  • the fifth optical element 4 has a central aperture 5. In the embodiment shown the size of this aperture 5 is chosen such that when the optical element is in the rear limit position and close to the second focus of reflector 1 light beam 3 will pass through aperture 5 in the fifth optical element 4 with no intensity loss or change of beam divergence.
  • the diffusing element is comprised of two semicircular diffusers 7. Which are configured to the rear of the fifth optical element 4.
  • sixth optical element 6 After passing through the aperture 5 in the fifth optical element 4 light beam 3 will impinge on the sixth optical element 6 which will modulate light beam 3 to form the output beam.
  • sixth optical element 6 In the configuration and positioning shown in Figure 1 where the fifth optical element 4 is at its rear, first, limit position and the spacing between the fifth optical element 4 and the sixth optical element 6 is maximal the output beam will be of minimal divergence.
  • sixth optical element 6 is a positive fresnel lens however the invention is not so limited and in further embodiments sixth optical element 6 may be either a positive or negative lens and may be piano convex, bi-convex, planoconcave, bi-concave, concave-convex or other lens shapes intended to modulate beam angle. .
  • Figure 2 illustrates a plan view along the optical axis of the optical path of an embodiment of the present invention positioned for maximum beam divergence.
  • light source 2 is positioned close to the first focus of elliptical reflector 1 so as to produce a light beam 3.
  • the light beam 3 will converge towards the second focus of the elliptical reflector.
  • An opaque aperture plate 10 is positioned adjacent to the second focus of reflector 1 to provide a controlled light beam by eliminating spill or stray light.
  • the diameter of light beam 3 will be at a minimum.
  • the fifth optical element 4 is positioned in the forward limit position such that optical element 4 is distant from the second focus of reflector 1 and closer to the sixth optical element 6.
  • the fourth optical element 7 is engages the light beam.
  • the diffuser 7 may be glass, plastic or other material known in the art and may be translucent, frosted or etched and may further contain prismatic or lenticular diffusion as known in the art.
  • the semicircular diffusers 7 may be a bisected simple or fresnel lens. They may be a single piece or multiple pieces.
  • the diffusing element illustrated in the figures is comprising two semicircular diffusers 7 which enter the light beam 3 from opposite sides. Thought not shown, in this embodiment, the diffuser and fifth optical element are mounted to the same carrier and travel along the light beam axis together. In the embodiment shown the diffuser 7 is mounted to the rear of the fifth optical element 4.
  • the diffuser may be mounted past the fifth optical element 4 along the optical axis. f.
  • the semicircular diffusers completely occlude the aperture 5 in the first optical element 4 and modulate the centre portion of light beam 3.
  • light beam 3 After passing through the opaque aperture plate 10 light beam 3 will impinge on the fifth optical element 4 and the diffusion element 7 whence light beam 3 will be diffused and refracted before impinging on sixth optical element 6 which will modulate the light beam 3 to form the output beam.
  • the output beam will be of maximal divergence.
  • the central region of illumination will be controlled by the diffusing element 7 so as to avoid excessive intensity in the output beam centre.
  • the sixth optical element remains fixed while the first optical element and its associated diffusing element are linked and move as a pair to adjust the separation between the forth and fifth optical elements and the sixth optical elements.
  • the extent of the occlusion of the central aperture is coupled to the mechanism for changing the separation of the optical elements.
  • the fifth optical element 4 moves toward the sixth optical element 6 while simultaneously the semicircular diffusers 7 start to close.
  • the movement of the semicircular diffusers 7 is coupled with the movement of the fifth optical element 4 such that, during approximately the first 20% of the movement of the fifth optical element 4, both semicircular diffusers 7 are moved from their first limit position, when they are outside the central aperture 5, to their second limit position, gradually closing together until the central aperture 5 of the fifth element 4 is completely occluded.
  • Figures 3 and Figure 4 show the fifth optical element 4 and connected diffusion elements 7 in their two limit positions.
  • the semicircular diffusers 7 are shown in their fully open first limit position such that they are outside the aperture 5 in fifth optical element 4.
  • Each of the two semicircular diffusers 7 are attached to pivot arms 8 which in turn are pivotally coupled to the lens carrier 9 which supports the fifth optical element 4.
  • the semicircular diffusers 7 are shown in their fully closed second limit position such that they completely occlude the aperture 5 in fifth optical element 4.
  • the mechanical coupling of the semicircular diffusers and pivot arms 8 with the movement of fifth optical element 4 is provided through means well known in the art.
  • Figure 7 illustrates an embodiment the optical train of a luminaire where the opaque aperture plate 10 may be varied in size to further enhance the range of beam divergence angles available to the user.
  • an additional step is provided in the sequence.
  • the variable size aperture plate 10 may be reduced in size to further reduce the beam divergence.
  • Figure 6 illustrates the coupling relationship between the movement of the optical elements the closing of the diffusing elements and the change in size of the aperture plate 10 so as to provide a large range of beam divergence adjustment.
  • the minimum beam angle Figure 6a of the system is achieved on the left side of the charts. This is when the optical elements 4 and 6 (shown in Figure 6b) are maximally separated, the diffusing elements 7 (shown in Figure 6c) are open and the aperture plate 10 size (shown in Figure 6d) is at a minimum. This minimum angle configuration is illustrated in Figure 7.
  • the first stage in increasing beam angle is to open the aperture plate 10 (shown in Figure 6d) while keeping the diffusing elements 7 and optical elements 4 and 6 static.
  • the diffusing elements 7 may start to close and the separation of the optical elements 4 and 6 reduced.
  • the diffusing elements 7 may reach their fully closed position before the optical elements 4 and 6 are minimally separated, in this case the optical elements 4 and 6 will continue to move closer together while all other elements are static.
  • the movement of the optical elements and diffusers are coupled either mechanically, electrically or through software and may be controlled by a single master control signal.
  • the movements of the individual optical elements and the diffusers are mechanically and electrically uncoupled from each other and may be individually controlled. Such decoupling allows the user to obtain useful results and beam profiles

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

La présente invention concerne généralement un système optique pour projecteur à effet aquatique et spécifiquement un système d’angle de faisceau variable élargissant la plage d’angles de faisceau et augmentant l’intensité lumineuse. La présente invention contient un élément optique modulateur de lumière présentant une ouverture centrale susceptible de se déplacer le long de l’axe optique du système. De plus l’ouverture centrale de l’élément modulateur peut être obstruée par un élément diffuseur. On peut également jouer sur le degré d’obstruction. Dans une première position limite dans laquelle le système optique est réglé sur une divergence minimale de faisceau, le faisceau lumineux va traverser l'ouverture sans perte d’intensité. Dans cette configuration le premier élément optique n’a pratiquement aucun effet sur le faisceau. Dans une seconde position limite dans laquelle le système optique est réglé sur une divergence maximale de faisceau, les diffuseurs recouvrent l’ouverture centrale pour diffuser l’éclairage central et ainsi éviter toute intensité excessive au centre du faisceau. Une ouverture de taille variable permet également d’étendre la plage d’angles de faisceau et de modulation de lumière.
PCT/US2009/036842 2008-03-11 2009-03-11 Système optique pour projecteur à effet aquatique WO2009114632A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09720590A EP2255127A1 (fr) 2008-03-11 2009-03-11 Système optique pour projecteur à effet aquatique

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US12/075,467 US20080247025A1 (en) 2006-03-03 2008-03-11 Optical system for a wash light
US12/075,467 2008-03-11
US12/075,466 US20080247024A1 (en) 2006-03-03 2008-03-11 Optical system for a wash light
US12/075,466 2008-03-11

Publications (1)

Publication Number Publication Date
WO2009114632A1 true WO2009114632A1 (fr) 2009-09-17

Family

ID=40717137

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/036842 WO2009114632A1 (fr) 2008-03-11 2009-03-11 Système optique pour projecteur à effet aquatique

Country Status (2)

Country Link
EP (1) EP2255127A1 (fr)
WO (1) WO2009114632A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014031644A1 (fr) * 2012-08-20 2014-02-27 Robe Lighting, Inc. Système de diffusion amélioré pour un luminaire automatique
WO2022268498A1 (fr) * 2021-06-23 2022-12-29 Signify Holding B.V. Système de givre variable

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007098720A1 (fr) 2006-03-03 2007-09-07 Robe Show Lighting S.R.O. Système optique

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007098720A1 (fr) 2006-03-03 2007-09-07 Robe Show Lighting S.R.O. Système optique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014031644A1 (fr) * 2012-08-20 2014-02-27 Robe Lighting, Inc. Système de diffusion amélioré pour un luminaire automatique
CN104395669A (zh) * 2012-08-20 2015-03-04 罗布照明有限公司 用于自动照明器的改进的漫射系统
WO2022268498A1 (fr) * 2021-06-23 2022-12-29 Signify Holding B.V. Système de givre variable

Also Published As

Publication number Publication date
EP2255127A1 (fr) 2010-12-01

Similar Documents

Publication Publication Date Title
US20080247025A1 (en) Optical system for a wash light
US6986591B2 (en) Non-imaging photon concentrator
US6746124B2 (en) Flashlight producing uniform high brightness
US7144134B2 (en) Light projector
CZ278791B6 (en) Lighting system for lamps, projection and enlarging apparatus
US10132470B2 (en) Versatile beam and wash optical system for an automated luminaire
CN108036277B (zh) 一种车灯及其光路传导装置
JP2008502096A (ja) 均一な像を形成する懐中電灯優先権主張本願は、２００４年３月５日に出願された、米国出願番号１０／７９４０７３の優先権を主張するものである。背景情報
CN109973912B (zh) 一种双片滑动式产生水纹3d起伏效果的灯具光学系统
EP1844262B1 (fr) Systeme optique pour unite washlight
US20080247024A1 (en) Optical system for a wash light
US6924945B1 (en) Compact light collection system with improved efficiency and reduced size
WO2009114632A1 (fr) Système optique pour projecteur à effet aquatique
CN106838666B (zh) 一种遮光角可控的小孔出光灯具
US7712924B2 (en) Optical device for adjusting the F-number of an elliptical lamp
WO2006041331A1 (fr) Procede et dispositif de formation de repartition lumineuse d'un dispositif d'eclairage
JP5587897B2 (ja) 顕微鏡用立体照明システム
US11175017B2 (en) System and method for producing a blending light distribution from LED luminaires
CA2615754A1 (fr) Source de lumiere pour systemes d'eclairage a haute efficacite
JPH0231926Y2 (fr)
CN213577065U (zh) 光束匀化装置以及光束匀化舞台灯
JPS6312491Y2 (fr)
JPS6312490Y2 (fr)
JPH0735202Y2 (ja) スポットライト
JPH10283821A (ja) 照明装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09720590

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2009720590

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE