Illumination – Photographic lighting – Including specific light modifier
Patent
1992-05-22
1994-12-06
Husar, Stephen F.
Illumination
Photographic lighting
Including specific light modifier
362 17, 362293, 362323, 354126, 359888, G03B 1502
Patent
active
053716558
ABSTRACT:
A lighting system and method with variable light intensity for use in motion picture photography. In the lighting apparatus, light emitted from a source is passed through an aperture and then through a section of a movable, neutral density filter. The preferred filter is specially designed to have a variable density, continuously increasing from one side of the filter to the other. By changing the position of the filter, selectively placing higher or lower density sections in the light path, the intensity of the light emitted by the lighting apparatus may be varied. The neutral density filter is selected to be generally color neutral so that the color quality of the light passing therethrough remains unchanged.
REFERENCES:
patent: 1820899 (1931-08-01), Greenewalt
patent: 3883243 (1975-05-01), Weiglas et al.
patent: 4015113 (1977-03-01), Gottschalk
patent: 4232359 (1980-11-01), Leon et al.
patent: 4392187 (1983-07-01), Bornhorst
patent: 4527198 (1985-07-01), Callahan
patent: 4535394 (1985-08-01), Dugre
patent: 4600976 (1986-07-01), Callahan
patent: 4602321 (1986-07-01), Bornhorst
patent: 4800474 (1989-01-01), Bornhorst
patent: 4890208 (1989-12-01), Izenour
patent: 4891738 (1990-01-01), Richardson et al.
patent: 4893225 (1990-01-01), Solomon
patent: 4897770 (1990-01-01), Solomon
patent: 4914556 (1990-03-01), Richardson
patent: 4958265 (1990-09-01), Solomon
patent: 4972306 (1990-11-01), Bornhorst
patent: 4984143 (1991-01-01), Richardson
Catalog, Reynard Enterprises, Inc., Laguna Niguel, Calif. pp. 30-31 (no date).
Murdock Nolan J.
Navarro Felipe
Husar Stephen F.
Panavision International L.P.
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