Cycloramic image projection system
First Claim
1. A cycloramic projection system wherein an image as viewed from a central point is projected in a complete circle about a spectator'"'"'s position from a single film, which comprises a light source, means for forming the light into a circular beam, a conical reflector arranged concentrically with the optical axis of said light beam and receiving light therefrom which is turned in a radially outward direction and condensed through the picture area of a circular loop of film concentric with the optical axis and which surrounds said reflector, a toroidal convex lens concentric with the optical axis and surrounding the film loop through which a 360°
- image of the picture thereon is focussed and projected onto a circular screen, and means for continuously wrapping the film loop on and off around said reflector whereby a continuously changing but temporarily stationary 360°
image is swept onto and off the screen.
1 Assignment
0 Petitions
Accused Products
Abstract
A cycloramic image projection system in which an image as viewed from a central point, is projected in a complete circle about the viewer'"'"'s position onto a drum-type screen. Included is a conical reflector arranged concentrically with the optical axis of a circular beam of light projected onto the reflector and which is turned in a radially outward direction and condensed through the picture area of a circular loop of film on a sprocket also concentric with the optical axis and which surrounds the reflector. A toroidal convex lens surrounds the film loop concentrically and serves to focus and project a 360° image of the picture onto the screen, and the film loop is continuously wrapped on and off around the reflector whereby a continuously changing but temporarily stationary 360° image is swept onto and off the screen. The sprocket and reflector are stationary, the toroidal lens is mounted on a pan table which rotates about the optical axis, and an arm on the table serves to pull the film from one reel, feed it through a slit in the lens, thence around the sprocket and back through the slit where it is rewound on the other reel.
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Citations
6 Claims
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1. A cycloramic projection system wherein an image as viewed from a central point is projected in a complete circle about a spectator'"'"'s position from a single film, which comprises a light source, means for forming the light into a circular beam, a conical reflector arranged concentrically with the optical axis of said light beam and receiving light therefrom which is turned in a radially outward direction and condensed through the picture area of a circular loop of film concentric with the optical axis and which surrounds said reflector, a toroidal convex lens concentric with the optical axis and surrounding the film loop through which a 360°
- image of the picture thereon is focussed and projected onto a circular screen, and means for continuously wrapping the film loop on and off around said reflector whereby a continuously changing but temporarily stationary 360°
image is swept onto and off the screen.
- image of the picture thereon is focussed and projected onto a circular screen, and means for continuously wrapping the film loop on and off around said reflector whereby a continuously changing but temporarily stationary 360°
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2. A cycloramic projection system wherein an image as viewed from a central point is projected in a complete circle about a spectator'"'"'s position from a single film comprising a pair of film storage reels mounted in parallel spaced concentric relation, a conical reflector located between said reels and concentric therewith, means for drawing film off one reel and re-winding it on the other, and means for continuously wrapping a loop of film on and off around said reflector as it passes from one of said reels to the other.
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3. A cycloramic projection system wherein an image as viewed from a central point is projected in a complete circle about a spectator'"'"'s position from a single film comprising a pair of film storage reels mounted in parallel spaced relation, a conical reflector located between said reels and concentric therewith, an annular rotatable pan table mounted concentrically with said reflector, means for rotating said pan table, a toroidal convex lens concentricaly surrounding said reflector and which is mounted on said pan table, means including a film guide arm on said pan table for continuously wrapping a loop of film on and off around said reflector through a slit in said lens as the film is pulled off one reel and rewound on the other, and means for projecting a circular beam of light in an axial direction through the opening in said pan table onto said reflector and which is turned thereby into a radially outward direction and condensed through the picture area of said film loop, said lens serving to focus a 360°
- image of the film loop, and a circular viewing screen surrounding said lens whereby a continuously changing but temporary stationary 360°
image is swept onto and off said screen. - View Dependent Claims (4, 5, 6)
- image of the film loop, and a circular viewing screen surrounding said lens whereby a continuously changing but temporary stationary 360°
Specification