3-D motion picture projection apparatus
AssigneeImax Systems Corporation
InventorsWilliam C. Shaw, Marian Toporkiewicz
Life of this patent
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Abstract
In an alternate eye 3-D motion picture projection apparatus of the rolling loop type, light projection is accomplished by the combination of focal plane shutters that are coupled to the rotor of the projector and a supplementary shutter arrranged to trim the projected light so that discrete "left eye" and "right eye" images are projected. Various embodiments are disclosed in which a rotary blade shutter is located at the stop of the projection lens. Where there are two projection lenses, a single blade or two counter-rotating blades trim the light projected through both lenses.
Claims12
A 3-D motion picture projection apparatus for alternately projecting images from respective series of corresponding "left eye" and "right eye" images, the apparatus comprising:
- at least one rolling loop film transport mechanism which includes a stator having an aperture and a rotor co-operating with the stator to define a film passage and having gaps for receiving film loops;
- a light source;
- a projection lens assembly;
- at least one primary shutter coupled to said rotor and bridging a said gap for interrupting light from said source projected through said aperture as the rotor rotates;
- and,
- supplementary shutter means adapted to modify the shuttering effect of said primary shutter so that projection of light through each image in one said series is terminated before commencement of projection of light through the next succeeding image of the other series, whereby discrete "left eye" and "right eye" images are projected.
In a 3-D motion picture projection apparatus for alternately projecting images from respective series of corresponding "left eye" and "right eye" images, the apparatus including at least one rolling loop film transport mechanism which includes a stator having an aperture and a rotor co-operating with the stator to define a film passage and having gaps for receiving film loops, a light source and a projection lens assembly;
- the improvement comprising, in combination, at least one primary shutter coupled to said rotor and bridging a said gap for interrupting light from said source projected through said aperture as the rotor rotates, and supplementary shutter means adapted to modify the shuttering effect of said primary shutter so that projection of light through each image in one said series is terminated before commencement of projection of light through the next succeeding image of the other series, whereby discrete "left eye" and "right eye" images are projected.
Dependencies are inferred from the claim text.