Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1989-10-13
1993-10-05
Arnold, Bruce Y.
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359250, 359256, 359259, 359276, 359286, 359305, 358296, 346108, G02F 101, G02F 111, G02F 129, G02B 530
Patent
active
052510581
ABSTRACT:
In a raster output scanner, a system for using one original beam and one facet of a rotating polygon to generate a scan line which can be turned on to have three levels of intensity. The original beam is first separated into two beams in a beam splitter. The resultant beams are polarized ninety degrees apart, and directed to the modulator. The beams are a sufficient distance apart so that the A/O modulator can modulate each beam with a minimum of crosstalk. The output beams are then brought together and combined into one beam without optical interference because the beams are polarized ninety degrees apart. The beam can have several levels of intensity and be used to create several levels of gray scale at the output.
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patent: 3503670 (1970-03-01), Kosanke et al.
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Ammann; "Modification of Devices Normally Operating Between Input and Output Polarizers to Allow Their Use With Arbitrarily Polarized Light" Journal of the Optical Society of America; vol. 55, No. 4, 1965 pp. 412-417.
Arnold Bruce Y.
Cunha Robert E.
Shafer R. D.
Xerox Corporation
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