F - Mech Eng,Light,Heat,Weapons – 21 – V
Patent
F - Mech Eng,Light,Heat,Weapons
21
V
F21V 9/10 (2006.01) F21S 8/00 (2006.01)
Patent
CA 2145491
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 (18) is passed through an aperture (36a) and then through a section of a movable, neutral density filter (50). 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. To ensure complete light blockage, a douser (80) of opaque material is provided which is selectively interposed in the outgoing light path.
Murdock Nolan J.
Navarro Felipe
Panavision International L.p.
Smart & Biggar
LandOfFree
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