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US 2022/0010945 A1Published application
Diffused light focusing method for use in film, television, and photographic media
AssigneeCinema Devices, Inc.
InventorADAM TEICHMAN
Life of this patent
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Abstract
A lighting assembly includes a Fresnel lens disposed at a controllable or predeterminable distance from a diffuse light source. Relatively small cutter cards are disposable between the diffuse light source and the Fresnel lens for generating various shadow effects on a photography, television or film production set. The light assembly enables a soft lighting of foreground subjects, typically actors, with a light intensity that stays relatively constant regardless of the distance of the subjects from the composite light source, specifically the Fresnel lens.
Claims26
A lighting method for the film and television production industry, comprising:
- providing at least one Fresnel lens and a diffuse light source, the diffuse light source having a sufficiently substantial width and a sufficiently substantial length, both extending at least partially transversely to an axis of light propagation from the diffuse light source, so as to enable diffuse or soft lighting of an actor on a photography, film or television production set;
- disposing said light source and said at least one Fresnel lens at a first distance from one another on the photography, film or television production set;
- disposing said at least one Fresnel lens at a second distance from the actor on the photography, film or television production set and at a third distance from a background panel or surface disposed on a side of said actor at least partially opposite the Fresnel lens;
- inserting a cutter or shadow card between said diffuse light source and said Fresnel lens;
- illuminating said actor with light transmitted from said diffuse light source to said at least one Fresnel lens and from same to said actor so that said actor is softly lit at least in part and so that said actor casts no sharp or hard shadows on said background panel or surface;
- and
- simultaneously with the illuminating of said actor, casting at least one shadow on said background panel by light from said diffuse light source by virtue of the inserting of said cutter or shadow card between said diffuse light source and said Fresnel lens.
4 more elements
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An artificial lighting assembly, comprising:
- a primary light source;
- a diffuser panel;
- a first support holding said diffuser panel in spaced relation to said primary light source to provide a secondary light source having a first predetermined light intensity;
- at least one microgroove Fresnel lens;
- at least one second support, said at least one microgroove Fresnel lens being disposed on the at least one second support, said first support and said second support being disposed at a selected distance from one another so that said diffuser panel is located in an object plane;
- and
- means for generating on said object plane an area of predetermined shape and predetermined size and of a second light intensity different from said first light intensity.
4 more elements
A kit for use in artificial lighting, comprising:
- a first support for holding a diffuse light source, the diffuse light source comprising an array of light emitting diodes;
- at least one Fresnel lens;
- at least one second support, said at least one Fresnel lens being disposable on the at least one second support, said first support and said second support being disposable in spaced relation to one another to define a light transmission path from said diffuse light source to said at least one Fresnel lens;
- and
- an electronic controller operatively connected to the array of light emitting diodes and configured to energize the light emitting diodes in a predetermined pattern of light emission including areas of reduced energization or light intensity and areas of greater energization or light intensity, thereby enabling generation of sharp or hard shadows of predetermined shapes on a background panel or wall on a side of a subject opposite the second support and the Fresnel lens.
2 more elements
A lighting method for the film and television production industry, comprising:
- providing a plurality of optical elements including at least one microgroove Fresnel lens, a primary light source, and a planar diffuser panel;
- disposing said planar diffuser panel between said primary light source and said at least one microgroove Fresnel lens to define an optical transmission path;
- locating said primary light source, said planar diffuser panel and said at least one microgroove Fresnel lens in spaced relation to a background panel or surface and to an actor in front of the background panel on a photography, film or television production set, the locating of said primary light source, said planar diffuser panel and said at least one microgroove Fresnel lens including selecting distances among said optical elements and said background panel so that said planar diffuser panel is located in an object plane and said background panel is located in an image plane of said at least one Fresnel lens;
- and
- transmitting light from said planar diffuser panel to said actor and said background panel via said at least one microgroove Fresnel lens, the transmitting of light including (i) bringing said planar diffuser panel into hard or sharp focus on said background panel, (ii) illuminating said actor only with soft lighting, and (iii) casting only soft shadows on said background surface by said actor.
2 more elements
The method defined in claim 28, further comprising inserting a cutter or shadow card between said diffuse light source and said at least one microgroove Fresnel lens.
Dependencies are inferred from the claim text.