Optics: motion pictures – Gates – Fluid pressure type
Patent
1990-03-23
1990-11-27
Hayes, Monroe H.
Optics: motion pictures
Gates
Fluid pressure type
352 28, 352229, G03B 152
Patent
active
049731513
ABSTRACT:
A rigid transparent cylinder is rotated about its axis of symmetry at a relatively high rate of speed by means of a motor. Around a portion of the circumference of the rotating cylinder is wrapped a flexible imaging medium such as photographic film, to which is applied longitudinal tension through means of a film transport. The film conforms to the curvature of the drum, but is held a small distance above the surface of the cylinder in equilibrium between the aerodynamic forces created by the rotating cylinder and the applied tension of the film transport, thus effecting a compliant surface air bearing. A stationary lamp within or behind the transparent cylinder passes light through the cylinder to project an image from the film onto a scanning element by use of a conventional optical system.
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Arndt Dennis R.
Eastman Kodak Company
Hayes Monroe H.
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