Optics: motion pictures – Combined with diverse-type device
Patent
1994-03-25
1996-05-07
Gellner, Michael L.
Optics: motion pictures
Combined with diverse-type device
352244, 362 18, 362293, 362323, 354126, 359888, G03B 2900, G03B 1502
Patent
active
055151191
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. To ensure complete light blockage, a douser of opaque material is provided which is selectively interposed in the outgoing light path.
REFERENCES:
patent: 1820899 (1931-08-01), Greenewalt
patent: 2748248 (1957-03-01), Rackett
patent: 3538825 (1970-10-01), Taylor
patent: 3883243 (1975-05-01), Weiglass et al.
patent: 4015113 (1977-03-01), Gottschalk
patent: 4232359 (1980-11-01), Leon et al.
patent: 4323952 (1982-04-01), Proske
patent: 4325083 (1982-04-01), Rouchon 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 (1990-04-01), Richardson
patent: 4958265 (1990-09-01), Solomon
patent: 4972306 (1990-11-01), Bornhorst
patent: 4984143 (1991-01-01), Richardson
patent: 5293542 (1994-03-01), Ise et al.
Catalog from Reynard Enterprises, Inc., Laguna Niguel, California, pp. 30-31 (no date).
Murdock Nolan J.
Navarro Felipe
Gellner Michael L.
Lee Eddie C.
Panavision International L.P.
LandOfFree
System for varying light intensity such as for use in motion pic does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for varying light intensity such as for use in motion pic, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for varying light intensity such as for use in motion pic will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1230871