Optics: motion pictures – Methods
Patent
1978-02-17
1979-06-19
Hayes, Monroe H.
Optics: motion pictures
Methods
352 43, 352 53, 352 58, 352 40, 352 86, G03B 1918, G03B 2132
Patent
active
041584872
ABSTRACT:
My invention relates to photographing scenes with standard motion picture photographic equipment where multiple views of a subject are photographed while the subject rests on a moving turntable and the stationary camera has its optical axis pointed at the turntable rotation axis or where the subject is stationary and the camera effectively moves in an arc about an axis located between the camera and scene.
The surface of the processed film (or other appropriate media) is arrayed in a vertical plane and constrained to move horizontally around a portion of a circle. Film images are scanned by a light source and radially projected in a direction away from a vertical rotation axis. Concentric with the vertical axis are the semi-specular screen of radius R and the scanning projector circle of radius close to R/3. The screen reflects projected light in a horizontal plane and scatters projected light in a vertical plane. The film is rapidly scanned by the projector and the images are projected sequentially while sweeping horizontally over the screen when the projector is between the vertical axis and the screen. At any instant, all projected rays reflected from the screen return to a vertical aerial exit slit along the projector's optical axis on the opposite side of the vertical axis with respect to the scan projector and on a scan circle radius about equal to R. The exit slit scan cycle repeats at short time intervals so as to avoid flicker.
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