EP1825323B1 - Bühnenbeleuchtungsverfahren und -vorrichtungen - Google Patents

Bühnenbeleuchtungsverfahren und -vorrichtungen Download PDF

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Publication number
EP1825323B1
EP1825323B1 EP04811513A EP04811513A EP1825323B1 EP 1825323 B1 EP1825323 B1 EP 1825323B1 EP 04811513 A EP04811513 A EP 04811513A EP 04811513 A EP04811513 A EP 04811513A EP 1825323 B1 EP1825323 B1 EP 1825323B1
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EP
European Patent Office
Prior art keywords
projection
variable density
filter
optical system
lens group
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EP04811513A
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English (en)
French (fr)
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EP1825323A4 (de
EP1825323A1 (de
Inventor
Thomas A. Hough
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Whiterock Design LLC
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Whiterock Design LLC
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    • 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
    • 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 generally to spot luminaries having associated color-changing mechanisms and more particularly to spot luminaires which include movable variable density filters configured to selectively control the color and intensity of a projected beam of light.
  • Spot luminaries such as stage lighting instruments, nightclub lighting instruments and the like having motorized subsystems operated by remote-control means are commonly referred to as "moving lights” or “automated luminaires.”
  • moving lights or “automated luminaires.”
  • spot luminaires are similar to the "profile spot” or ellipsoidal reflector spotlight commonly used in theaters, and provide a hard-edged beam of light.
  • This kind of spotlight has a gate aperture at which various devices can be placed to define the shape or profile of the light beam and has a projection optical system including one or more objective lens elements.
  • a spot luminaire projects an image of the brightly-illuminated gate aperture, including whatever light-shaping, pattern-generating, or image-forming devices might be placed there.
  • Wash luminaires are similar to the "Fresnel Spot" luminaire, which provides a soft-edged, ill-defined beam that can be varied in size by moving the lamp and reflector towards or away from the lens.
  • This kind of wash light has no gate aperture and projects no image, but projects only a soft-edged pool of light shaped by whatever lens or lenses are mounted over the exit aperture of the luminaire.
  • FIGS. 1-6 Typical prior art spot luminaires, and some particular problems associated with them are now discussed with reference to FIGS. 1-6 .
  • like numerals are used to describe like structures when appropriate.
  • the optical system 10 includes a lamp 15 and a concave reflector 17. Together the lamp 15 and concave reflector 17 comprise a light source 20.
  • the optical system 10 also includes a field stop/projection gate 25, a light pattern generator 26, and a projection lens 30. The light then exits the projection lens 30 and travels over a distance 32 to a distant projection surface 35.
  • the distant projection surface 35 can be considered to be at least six meters (twenty feet) from the projection lens 30.
  • outer “zigzag” boundary lines between the reflector and lens of this figure represent “edge rays,” which show the outer boundaries of the path of the light from the light source 20 as it travels through the optical system from left to right. This convention applies to all figures incorporated herein. Of course, a single ray of light travels in a straight line unless being reflected or refracting through a lens.
  • the light source 20 can be thought of as illuminating an object 38 (here shown as an up-right arrow) located at the projection gate 25.
  • the object 38 can simply be an aperture formed in the field stop/projection gate 25, or the object 38 can be a light pattern generator 26 which is located at the projection gate 25.
  • An image of the projection gate 25 (or the light pattern generator 26 contained therein) is projected onto the distant projection surface 35.
  • the image of the object 38 is shown by an inverted arrow 40 located on the distant projection surface 35.
  • the basic optical system which is shown in FIG. 1 will project a polychromatic (white) beam of light. While a white beam of light is useful in many cases, the development of a smooth and uniformly colored beam of light has long been a goal of many lighting manufactures.
  • One of the easiest ways to impart color to a beam of light is through the use of simple absorptive color filters as described below.
  • FIG. 2 a typical prior art spot luminaire projection optical system is indicated by the numeral 50.
  • the basic structure of the spot luminaire projection optical system 50 is the same as the optical system 10 described above with reference to FIG. 1 .
  • the optical system 50 also includes an absorptive color filter media or gel 55 which is shown to the right of the projection lens 30. Since the gel 55 is larger then the projection lens 30, the light exiting the spot luminaire 50 passes through the gel 55. The result is a uniformly colored image 40 of the projection gate 25 and the light pattern generator 26 contained therein.
  • the optical system 60 also includes a dichroic filter 65.
  • the dichroic filter 65 is typically positioned near the projection gate 25, and can therefore be much smaller than corresponding gel filters of the same color. Due to their small size, it is possible for a number of dichroic filters 65 to be positioned on a wheel hub and rotated into the beam of light, allowing for rapid color changes. All of the light exiting the spot luminaire 60 passes through the dichroic filter 65, resulting in a uniformly colored image 40 of the projection gate 25 and any light pattern generator 26 contained therein.
  • variable density patterned dichroic color filter wheel 70 is described.
  • Variable density patterned dichroic color filter wheels 70 such as this have been employed in some prior art spot luminaire projection optical systems.
  • a color filter wheel 70 When a color filter wheel 70 is used, it will typically be positioned between the concave reflector 17 and the projection gate 25 (as shown in FIG. 5 ).
  • the density of the pattern etched onto the color filter wheel 70 varies radially around the wheel 70.
  • FIG. 4 shows the beam of light 75 passing through the color filter wheel 70 as a circle.
  • the variable density patterned dichroic color filter wheel 70 is rotated, the saturation level of the beam's color will increase or decrease, depending on the position of the wheel 70 in relation to the beam 75.
  • the patterned dichroic color filter wheel 70 is patterned with a number of fingers 77.
  • the thickness of each finger 77 varies radially around the wheel 70.
  • the saturation of the color in the projected beam 75 depends on the wheel's location in relation to the beam 75. For example, when the wheel 70 is positioned so that the beam of light 75 passes through the clear portion of the wheel 70 (as shown in FIG. 4 ) the projected beam will be white.
  • FIG. 5 a prior art spot luminaire projection optical system 80 which incorporates a single patterned dichroic color filter wheel 70 is shown.
  • the basic structure of the spot luminaire projection optical system 80 is similar to the optical system described above with reference to FIG.1 .
  • the optical system 80 also includes a single patterned dichroic color filter wheel 70.
  • the patterned dichroic filter wheel 70 is positioned near the projection gate 25 to ensure that the wheel 70 is as small as possible. Since the pattern 77 is located adjacent to the light pattern generator 26 and the projection gate 25, the pattern 77 etched onto the color filter wheel 70 is visible in the projected beam of light, and will be imaged on the distant projection surface 35. The visibility and imaging of the pattern 77 is undesirable as the projected beam of light will not be smooth and uniformly colored.
  • a diffusing optical element 85 ( FIG. 6 ) can be placed in the beam path.
  • the diffusing optical element 85 can be positioned between the patterned color filter media 70 and the projection gate 25.
  • the diffusing optical element 85 serves to blur the image of the pattern 77 etched onto the color filter wheel 70. The effect is similar to viewing a scene through a frosted glass window; the detail (in this case the pattern 77 etched onto the color filter 70) is not discernable.
  • fig 6 shows a prior art spot luminaire projection optical system 90.
  • the basic structure of the spot luminaire projection optical system 90 is similar to that of optical system 10 which was described above with reference to FIG. 1 .
  • the optical system 90 also includes a patterned color and dimming apparatus 95 (consisting of cyan, yellow and magenta color wheels and a patterned dimmer wheel) and a diffusing optical element 85.
  • a patterned color and dimming apparatus 95 consisting of cyan, yellow and magenta color wheels and a patterned dimmer wheel
  • the diffusing optical element 85 will scatter light out of the projection lens system 30. This results in a loss of energy in the projected beam, which is undesireable.
  • the light rays being scattered outside of the projection lens 30 are indicated by the numeral 97.
  • a spot luminaire includes a light source for emitting a beam of light and a projection lens configured to project the beam of light towards a distant target.
  • a first field stop through which the beam of light passes, is positioned between the light source and the projection lens.
  • a filter apparatus is positioned proximate the first field stop and is adapted for selectively moving at least one variable density filter across the beam of light.
  • a relay lens group is positioned between the first field stop and the projection lens. The relay lens group is configured to position an image of the filter apparatus so that the image of the filter apparatus is not imaged by the projection lens to prevent the variable density filter from being imaged by the projection lens.
  • the filter apparatus is adapted for selectively rotating a plurality of variable density filters across the beam of light.
  • FIG. 1 is a schematic diagram of a prior art projection optical system
  • FIG. 2 is schematic diagram of a prior art projection optical system including an absorptive color filter
  • FIG. 3 is schematic diagram of a prior art projection optical system containing an unpatterned dichroic color filter
  • FIG. 4 is a pictorial representation of a patterned dichroic color wheel
  • FIG. 5 is a schematic diagram of a prior art projection optical system including patterned dichroic color filter
  • FIG. 6 is schematic diagram of prior art projection optical system including a patterned color filter and dimming apparatus and a diffusing optical element;
  • FIG. 7 is schematic diagram of a projection optical system including a patterned color and dimming apparatus and a relay lens system;
  • FIG. 8 is schematic diagram of a projection optical system including a patterned color and dimming apparatus and a relay lens system including a negative lens at the first field stop according to the present invention
  • FIG. 9 is schematic diagram of a projection optical system including a patterned color and dimming apparatus and a relay lens system including a negative lens at the second field stop according to the present invention.
  • FIG. 10 is schematic diagram of a projection optical system including a patterned color and dimming apparatus and a relay lens system including a negative lens positioned within the relay lens according to the present invention
  • FIG. 11 is a pictorial representation of a motor driven color and dimming mechanism according to the present invention.
  • FIG. 12 is a pictorial representation of a relay lens color and dimming apparatus according to the present invention.
  • the present invention utilizes a patterned color and dimming apparatus, deployed near a small aperture, to uniformly color a projected beam of light. It should be noted, that because the size of the color and dimmer wheels depend on the size of the aperture, it is advantageous that the aperture be as small as possible.
  • a diffusing optical element To avoid losing energy from the projected beam due to the scattering of light by a diffusing optical element, as was the case with the prior art depicted in Fig. 6 and described above, it is desirable to relocate the real image of the patterned color and dimming wheels to a volume of space that is not imaged by the projection lens.
  • a weak negative lens to a relay lens group can serve to relocate the image of the color and dimming system to a volume of space that is not imaged by the projection lens.
  • weak is meant that the absolute value of the negative power of the lens is less than the combined power of the downstream positive lens group. This results in a highly efficient projection system with a uniformly colored projected beam.
  • the optical system 110 includes a lamp 115 and a concave reflector 117. Together, the lamp 115 and the concave reflector 117 form the light source 120.
  • the optical system 110 also includes a first field stop 125.
  • a patterned color and dimming apparatus 95 is located in a volume contiguous to the first field stop 125.
  • a positive relay lens group 130 is shown to include a first positive lens 140 and a second positive lens 150.
  • the optical system 110 also includes a second field stop 160 which is coincident with the projection gate, a light pattern generator 166, and a projection lens 170. A distance 175 separates the projection lens 170 from a distant projection surface 180.
  • the positive relay lens group 130 relays an image 190a of the patterned color and dimming filters 95 and first field stop 125, forming said image 190a at a volume contiguous to the second field stop 160.
  • the second field stop 160 is located some distance downstream of the positive relay lens group 130.
  • the second field stop 160 is the same size, and in the same location, as the projection gate. Since the second field stop/projection gate 160 are coincident, the real images 190a of the patterned color and dimming wheels 95 act as objects for the projection lens 170. Therefore, the projected beam not only contains an image of the projection gate 160 and the pattern generator 166, but also contains an image of the patterned color and dimmer wheels 190a. It would, however, be preferable to not have the image of the patterned color and dimming filters 95 formed at the projection surface 180.
  • the optical system 200 includes a lamp 115 and a concave reflector 117. Together, the lamp 115 and the concave reflector 117 form the light source 120.
  • the optical system 200 also includes a first field stop 125.
  • a patterned color and dimming apparatus 95 is located in a volume contiguous to the first field stop 125.
  • a positive relay lens group 130 is shown to include a first positive lens 140 and a second positive lens 150.
  • the optical system 200 also includes a negative relay lens group 210. Together the positive relay lens group 130 and the negative relay lens group 210 comprise the relay lens group or overall relay lens group 220.
  • the optical system 200 also includes a second field stop 160 which is coincident with the projection gate and a light pattern generator 166.
  • the optical system 200 further includes a projection lens 170 which functions to project a beam of light across distance 175 to a distant projection surface 180.
  • a weak negative lens 210 serves to relocate the image 190b of the color and dimming system to a volume of space that is not imaged by the projection lens 170. It is therefore possible, through design, to force the image 190b of the patterned filter media 95 and the first field stop 125 to lie within or beyond the projection lens train, in a volume that is not imaged by the projection lens 170. In one embodiment, this will be accomplished by disposing image 190b away from the second field stop. In another embodiment, the image of the color and dimming system is disposed downstream of the second field stop. In another embodiment, the image is disposed downstream of the upstream surface of the projection lens. In another embodiment, the image of the color and dimming system projected by the relay lens group 210 is disposed downstream of the downstream surface of the projection lens 170, but not proximate the projection surface.
  • a properly designed relay lens system 220 allows the patterned filter media 95 to be placed near the first field stop 125 which is the smallest area in the beam of light, while ensuring that the images 190b of the patterned filter media 95 and first field stop 125 occupy a volume that is not re-imaged by the projection lens 170.
  • the result is superior color mixing of the projected beam while minimizing the size of the patterned color filter material. It is believed that this type of relay lens color and dimming apparatus will provide uniform color mixing and high optical throughput.
  • FIG. 9 another spot luminaire projection optical system 300 according to the present invention is described.
  • the basic structure of the spot luminaire projection optical system 300 is similar to the optical system 200 described above with reference to FIG. 8 .
  • the negative relay lens group 310 is positioned near the second field stop 160.
  • the positive relay lens group 130 and the negative relay lens group 310 comprise the relay lens group or overall relay lens group 320.
  • the addition of a weak negative lens 310 serves to relocate the image 190c of the color and dimming system 95 to a volume of space that is away from the second field stop and not imaged by the projection lens 170.
  • FIG. 10 yet another spot luminaire projection optical system 400 according to the present invention is shown.
  • the basic structure of the spot luminaire projection optical system 400 is similar to the optical system 200 described above with reference to FIG. 8 .
  • the negative relay lens group 410 is positioned within the positive relay lens group 130 (between the first positive lens 140 and the second positive lens 150). Together the positive relay lens group 130 and the negative relay lens group 410 comprise the relay lens group 420.
  • the addition of a weak negative lens 410 serves to relocate the image 190d of the color and dimming system 95 to a volume of space that is not imaged by the projection lens 170.
  • the filter apparatus 95 can be positioned proximate the first field stop 125. This placement of the filter apparatus 95 is shown in FIGS. 8-10 and 12 . In these figures, one may also appreciate that the filter apparatus 95 can include a plurality of variable density filters.
  • the filter apparatus 95 can be adapted for selectively moving at least one variable density filter across the beam of light.
  • the filter apparatus 95 can also be adapted for selectively moving or rotating a plurality of variable density filters 500 across the beam of light.
  • These variable density filters 500 can be color filters and/or dimming filters. Therefore, movement can allow the operator to control the color and intensity (luminance) of the beam of light.
  • the filter apparatus 95 is shown to include a series or stack of patterned wheels 500.
  • the stack of patterned wheels 500 includes three color filter patterned wheels 510, 520 and 530. These correspond respectively to a cyan color wheel 510, a yellow color wheel 520, and a magenta color wheel 530. The remaining wheel is a dimming wheel 540.
  • the filter apparatus 95 also includes a plurality of actuators or motors 600 which can be used for driving, moving, or causing rotation of the patterned wheels 500 in the beam of light.
  • Each of the wheels 500 includes a central hub. However, only the central hub 560 of the dimming wheel 540 is shown in the view provided by FIG. 11 .
  • the hub 560 of the dimming wheel 540 serves as a point of attachment for a drive belt 580.
  • the drive belt 580 is also connected to one of the actuators 600. Here the drive belt 580 is connected to an actuator or motor 680
  • the hubs (not shown) of the remaining wheels (510, 520 and 530) are similarly coupled to drive belts 586, 584 and 582. These drive belts are in turn coupled to actuators or motors 686, 684 and 682. For example, when actuator 680 is activated, it will cause belt 580 to move, thereby causing rotation of the dimming wheel 540.
  • the motors or actuators 600 can be mounted to a plate containing the first field stop 125. As each color filter 500 is rotated into the beam, it colors a portion of the rays passing through the first field stop 125. As the dimmer wheel 540 is rotated into the beam, it attenuates a portion of the rays passing through the first field stop 125 of the relay lens.
  • the patterned wheels 500 in the stack can be either color filters or dimming filters.
  • a dimming filter such as patterned wheel 540 at the first field stop location 125 ( FIG. 12 ).
  • the dimming filter works on the same principle as the color filters, except that it blocks the light rather than coloring it.
  • the dimmer can be located near the first field stop 125. Therefore, any pattern etched onto the dimmer. 540 will not visible in the projected beam, and the dimmer 540 will merely control the amount of light present in the projected beam.
  • the patterned media need not be in a wheel configuration.
  • the patterned media can be disposed on a sliding plate which can be used to slidably move to place the desired portion of the media into the light beam, rather than by rotating it, as with the wheel 500.
  • the various color mixing systems or filter apparatus 95 can be positioned near the first field stop 125, which is located between the concave reflector 117 and the projection lens 170.
  • the relay lens group e.g., groups 220, 320 and 420
  • the relay lens group is designed so that a real image of the field stop 125 and color filter means 95 occupies a volume that is not re-imaged by the projection lens 170.
  • These color filters can be composed of patterned color filter material deposited on substrates having any shape. As the filters 95 are moved into the path of the light beam, their edges are not visible and the projected image is evenly colored.
  • the projected image will have a fully blended homogeneous color.
  • the actual shade and intensity of the image is dependent on the area of the field stop 125 covered by the unpatterned filter material.
  • the principles of color filtering at a field stop are thus independent of any specific actuator means or specific filter shape.
  • FIG. 12 shows a relay lens color and dimming apparatus 95 according to the present invention.
  • Patterned cyan, yellow, magenta, and dimmer wheels 510, 520, 530 and 540 are shown positioned before a first field stop plate 125.
  • a weak negative lens 210 can be positioned in, and held by, the field stop plate aperture 125.
  • a pair of lenses 140 and 150 comprises the positive lens relay group 130.
  • a second field stop plate 160 is the same size, and in the same location, as the projection gate.
  • the color mixing system is well-suited for placement in the path of a high-intensity beam of light for illuminating a light pattern generator, gobo, or an image generator system.
  • the color mixing system can also be used independently in any spot luminaire having a projection lens with a well defined projection gate.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (18)

  1. Ein optisches Projektionssystem mit:
    einer Lichtquelle (115);
    ein Projektionsfenster (160);
    eine Projektionslinse (170), die so ausgestaltet ist, dass sie ein Bild des Projektionsfensters projiziert, wobei das Projektionsfenster zwischen der Lichtquelle und der Projektionslinse angeordnet ist;
    einer Filtervorrichtung (95), die in der Nähe einer Blende (125) angeordnet ist, welche zwischen der Lichtquelle und dem Projektionsfenster angeordnet und dazu ausgestaltet ist, einen gewünschten Bereich eines variablen Dichtefilters in einem Bereich des Lichts von der Lichtquelle, welche das Projektionsfenster beleuchtet, anzuordnen; und
    einer Übertragungslinsengruppe (220, 320, 420), die zwischen der Filtervorrichtung und dem Projektionsfenster angeordnet ist, wobei die Übertragungslinsengruppe so ausgestaltet ist, dass sie ein Bild des Filters mit variabler Dichte bildet, wobei das Bild des Filters mit variabler Dichte weg von dem Projektionsfenster angeordnet ist, um zu verhindern, dass die Projektionslinse ein Bild auf den Filter mit variabler Dichte projiziert.
  2. Das optische Projektionssystem nach Anspruch 1, wobei die Übertragungslinsengruppe folgende Elemente aufweist:
    eine erste Linsengruppe (210) mit negativer optischer Leistung; und
    eine zweite Linsengruppe (140, 150) mit positiver optischer Leistung.
  3. Das optische Projektionssystem nach Anspruch 2, wobei die zweite Linsengruppe zwischen der ersten Linsengruppe (210) und dem Projektionsfenster angeordnet ist.
  4. Das optische Projektionssystem nach Anspruch 2, wobei die erste Linsengruppe (310) zwischen der zweiten Linsengruppe und dem Projektionsfenster angeordnet ist.
  5. Das optische Projektionssystem nach Anspruch 2, wobei die zweite Linsengruppe dritte und vierte Linsengruppen aufweist und die erste Linsengruppe (210) zwischen den dritten und vierten Linsengruppen angeordnet ist.
  6. Ein optisches Projektionssystem nach einem der vorhergehenden Ansprüche, wobei die Filtervorrichtung dazu ausgestaltet ist, gewünschte Bereiche jedes einer Mehrzahl von Filtern mit variabler Dichte in dem Lichtbereich anzuordnen.
  7. Das optische Projektionssystem nach Anspruch 6, wobei die Mehrzahl von Filtern mit variabler Dichte einen Farbfilter und einen Abblendfilter aufweist.
  8. Das optische Projektionssystem nach Anspruch 6, wobei die Mehrzahl von Filtern mit variabler Dichte drei Farbfilter aufweist.
  9. Das optische Projektionssystem nach Anspruch 6, wobei die Filtervorrichtung eine Mehrzahl von Stellgliedern aufweist, wobei jedes Stellglied mit einem zugeordneten Filter mit variabler Dichte gekoppelt ist.
  10. Das optische Projektionssystem nach Anspruch 6, wobei die Übertragungslinsengruppe ein Bild der Filter mit variabler Dichte formt, wobei das Bild der Filter mit variabler Dichte weg von dem Projektionsfenster angeordnet ist.
  11. Das optische Projektionssystem nach Anspruch 6, außerdem mit einem Feldstopp, wobei die Filter mit variabler Dichte in einem Volumen angeordnet sind, das an den Feldstopp angrenzt.
  12. Ein Verfahren zum Projizieren eines Lichtpunktes umfassend:
    Positionieren einer Lichtquelle (115) zum Beleuchten eines Projektionsfensters (160);
    Konfigurieren einer Projektionslinse (170), um ein Bild des Projektionsfensters zu projizieren, wobei das Projektionsfenster zwischen der Lichtquelle und der Projektionslinse angeordnet ist;
    Platzieren eines Filters (95) mit variabler Dichte in einem Lichtbereich in der Nähe der Position einer Blende (125) zwischen der Lichtquelle und dem Projektionsfenster; und
    Konfigurieren einer Übertragungslinsengruppe (220, 320, 420), die zwischen dem Filter (95) mit variabler Dichte und dem Projektionsfenster angeordnet ist, um ein Bild des Filters mit variabler Dichte zu bilden, wobei das Bild des Filters mit variabler Dichte weg von dem Projektionsfenster angeordnet ist, um zu verhindern, dass die Projektionslinse ein Bild des Filters mit variabler Dichte projiziert.
  13. Das Verfahren nach Anspruch 12, wobei das Platzieren eines Filters mit variabler Dichte in einem Lichtbereich von der Lichtquelle außerdem das Positionieren einer Mehrzahl von Filtern mit variabler Dichte in den Lichtbereich von der Lichtquelle umfasst.
  14. Das Verfahren nach Anspruch 13, wobei die Mehrzahl von Filtern mit variabler Dichte einen Farbfilter (510, 520, 530) und einen Abblendfilter (540) umfasst.
  15. Das Verfahren nach Anspruch 14, wobei die Mehrzahl von Filtern mit variabler Dichte drei Farbfilter umfasst.
  16. Das Verfahren nach Anspruch 12, wobei der Filter mit variabler Dichte ein Stellglied aufweist.
  17. Das Verfahren nach Anspruch 12, wobei die Übertragungslinsengruppe folgende Elemente aufweist:
    eine erste Linsengruppe mit negativer optischer Leistung; und
    eine zweite Linsengruppe mit positiver optischer Leistung.
  18. Das Verfahren nach Anspruch 12, wobei der Filter mit variabler Dichte in einem Volumen angeordnet ist, das an einen der Lichtquelle zugeordneten Feldstopp angrenzt.
EP04811513A 2004-11-19 2004-11-19 Bühnenbeleuchtungsverfahren und -vorrichtungen Active EP1825323B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2004/038809 WO2006054999A1 (en) 2004-11-19 2004-11-19 Stage lighting methods and apparatus

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EP1825323A1 EP1825323A1 (de) 2007-08-29
EP1825323A4 EP1825323A4 (de) 2009-04-08
EP1825323B1 true EP1825323B1 (de) 2011-05-25

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AT (1) ATE511123T1 (de)
CA (1) CA2588975C (de)
WO (1) WO2006054999A1 (de)

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Also Published As

Publication number Publication date
EP1825323A4 (de) 2009-04-08
ATE511123T1 (de) 2011-06-15
EP1825323A1 (de) 2007-08-29
CA2588975A1 (en) 2006-05-26
CA2588975C (en) 2013-08-06
WO2006054999A1 (en) 2006-05-26

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