Optical: systems and elements – Optical modulator – Light wave directional modulation
Patent
1996-01-30
1997-11-04
Ben, Loha
Optical: systems and elements
Optical modulator
Light wave directional modulation
347240, 347241, 355 1, G02B 2608
Patent
active
056846207
ABSTRACT:
An imaging apparatus modulates or gates pluralities of light beams through individual light valves, thereby providing a greater number and finer resolution of modulated light beams without increasing the number of light valves or decreasing the spacing between adjacent light valves. A two-step modulation process is used, the first step being performed by a light generator incorporating a polygon mirror that selectively illuminates selected bundles of fiber optic strands. One strand from each bundle is routed to illuminate one of the cells in a light valve array, such that when a bundle is illuminated, every cell is illuminated by a strand from the illuminated bundle. The second step of the modulation process involves controlling the light valve array to modulate the light beams formed by the illuminated strands at each cell. Further, by ganging together multiple light valve arrays, a composite scan line may be created which spans across the width of several scan lines generated by the individual light valve arrays. The result is finer resolution and greater imaging speed utilizing far fewer light valves.
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Ben Loha
Schoonscan, Inc.
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