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US 5,497,252 AGranted
Internal drum plotter with multiple focal point holographic optical element
AssigneeScitex Corporation Ltd.
InventorIlan Ben-David
Life of this patent
Estimating the term…
Abstract
An internal drum plotter in which a multiple focal point holographic element receives respective modulated light beams, one for each focal point, to focus the light beams on a light sensitive medium on the internal surface of the drum. The holographic element is rotated to trace the modulated light beams in separate, respective lines on the light sensitive medium.
Claims11
An internal drum plotter comprising:
- a drum having an internal surface for an internal light sensitive medium;
- at least one light source for providing a plurality of modulated light beams;
- a multiple focal point optical element having a plurality of focal points one for each light beam, said multiple focal point optical element being positioned within said drum for focussing said plurality of light beams each onto its corresponding one of said plurality of facal points located on said light sensitive medium;
- and
- a motion assembly which moves said multiple faocal point optical element, thereby to affect simultaneous plotting of said plurality of modulated light beams in respective discrete lines on said light sensitive medium axially spaced from one another.
2 more elements
Dependencies are inferred from the claim text.