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
  • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
  • F21V29/50—Cooling arrangements
  • F21V29/56—Cooling arrangements using liquid coolants
• • 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
• • 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
  • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
  • F21V9/12—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light with liquid-filled chambers
• • 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
  • F21W2131/10—Outdoor lighting
  • F21W2131/105—Outdoor lighting of arenas or the like
• • 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
  • F21W2131/10—Outdoor lighting
  • F21W2131/107—Outdoor lighting of the exterior of buildings
• • 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 high power industrial optics. It is a question of creating a light projector whose light power can be much higher than all that currently exists. The use of such a system does not require any heat-resistant glass to project fixed or moving images, hence a considerable gain in optical efficiency.
• Current projectors are traditionally composed of a light source, a reflector and an output lens of the Fresnel lens type. Their power is limited to 20 Kw. This power is limited and requires the use of heat-resistant glass which penalizes the light output necessary for projecting still images.
• the device according to the invention overcomes this drawback.
• the nature of the invention consists in using the optical and thermal properties of fluid elements in a stable state, or set in motion by natural convection, or maintained in forced movement in a container studied with appropriate optical interior shapes.
• We will use the forced and maintained variation of the refractive index by controlling the thermal gradient of the fluid medium thus creating a gradient of refractive index.
• the properties of transmission or absorption of part of the light flux by the fluid as a function of the wavelength are used. It is an optic which collects all the light produced by one or more light sources, whatever the incidence of the input radiation and its position relative to its entry face, channels and concentrates it into a divergent sheet whose shape is fixed.
• This optic uses the properties of refraction and total reflection, on the one hand on its surfaces and diopters according to the laws of Descartes-Snell and on the other hand within the moving fluid itself. It should be noted that this optic is thermally controlled by forced movements of gaseous or liquid fluids. This new system avoids the use of heat filters penalizing current projectors (efficiency of 25 to 30%) for the projection of still images. Heat filters absorb a significant amount of visible light.
• the solution adopted consists in circulating a fluid transparent to visible light and opaque to other light rays in a container of appropriate shape and perfectly defined so that the laws of Descartes-Snell are verified and subjected to a laminar circulation creating in sound within a regulated thermal gradient favoring the concentration of light rays by successive reflections and refractions.
• the device includes the following numbered elements.
• the interior shape (1) constitutes the essential of the FLUID OPTICS. This shape is generated by the revolution of a logarithmic spiral arc.
• the surface is covered with a chrome, nickel-plated, silver reflective deposit, or made up of a deposit of glass or any other perfectly reflecting system.
• This form can be performed in a pressure foundry (aluminum foundry, cast iron or any other material having good mechanical and thermal resistance) on which it is possible to fix a reflective deposit.
• the interior geometry must be - perfect.
• the receptacles (2) and (3) supports of the internal shape, are formed of two envelopes made integral by screws and a seal (). These envelopes can externally serve as a radiator to evacuate excess calories by forced circulation of a refrigerated fluid.
• the outer casing (5) retaining the refrigerant.
• the transparent porthole (7) forming the inlet face.
• the seal is produced by an O-ring.
• the outlet cone (9) of the interior shape of the marked container (1) is made of transparent material such as glass of optical quality very resistant to temperature. This cone is held to the assembly (1), (2) and (3) by a retaining flange (11). The assembly is sealed by an O-ring (10). The top (12) of the cone is wearing a flow collar which allows the evacuation of the optical fluid A for its cooling.
• the fluid must in all optics be animated by a centripetal movement of rotation until its evacuation by the top of the outlet cone.
• the flow flange (13) contributes to evacuating the optical fluid A towards a cooling and filtering device in closed circuit (15) by means of a pipe (14). It is indeed this fluid which partially removes the unnecessary heat energy created by infrared radiation.
• the discharge pipe (14) will be flattened in the direction of the light flow to at least obscure the outlet beam.
• Closed circuit device comprising a filter, a pump and a heat exchanger.
• the thermal fluid B for cooling (16) of the peripheral radiator penetrates on the side of the optical inlet face (hottest face). The exit will be on the side of the exit cone.
• the whole assembly must be implemented and controlled by a servomechanism.
• the assembly must be controlled from temperature, pressure and flow test points distributed over strategic locations in the coolant circuit.
• the creation of a VERY LARGE POWER optic projector makes it possible to significantly increase the optical efficiency and to diversify the field of application of these devices.
• This type of projector is capable of reproducing a fixed or moving image on a screen (clouds or public buildings) located at great distance.
• the projector is therefore well suited for light and sound shows or large-scale outdoor performances. It also allows the projection of tablecloths of great light intensity, of large beam opening (about 170 * ) at long distance.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Spectroscopy & Molecular Physics (AREA)
• Projection Apparatus (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)
• Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
• Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
• Vessels And Coating Films For Discharge Lamps (AREA)
• Overhead Projectors And Projection Screens (AREA)
• External Artificial Organs (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9428798

Family Applications (1)

Country Status (10)

Families Citing this family (13)

Citations (2)

Family Cites Families (12)

• 1992
  • 1992-04-13 FR FR9204509A patent/FR2689961B1/fr not_active Expired - Lifetime
• 1993
  • 1993-03-30 AT AT93907906T patent/ATE142321T1/de not_active IP Right Cessation
  • 1993-03-30 ES ES93907906T patent/ES2095047T3/es not_active Expired - Lifetime
  • 1993-03-30 US US08/157,205 patent/US5555493A/en not_active Expired - Fee Related
  • 1993-03-30 EP EP93907906A patent/EP0589016B1/fr not_active Expired - Lifetime
  • 1993-03-30 WO PCT/FR1993/000314 patent/WO1993021474A1/fr not_active Ceased
  • 1993-03-30 CA CA002111020A patent/CA2111020C/fr not_active Expired - Fee Related
  • 1993-03-30 JP JP51803393A patent/JP3411277B2/ja not_active Expired - Fee Related
  • 1993-03-30 DE DE69304477T patent/DE69304477T2/de not_active Expired - Fee Related
  • 1993-03-30 DK DK93907906.7T patent/DK0589016T3/da active

Patent Citations (2)

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