Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1997-09-16
1999-11-09
Epps, Georgia
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359254, 359259, 359316, 359320, 349 3, 349 66, 349 73, 349 74, 349 75, B41J 2445, G02B 2602, G02F 1133
Patent
active
059825294
ABSTRACT:
A spatial light modulator for use in a optical printer where the spatial light modulator includes a plurality of cells, having a shape that is defined to decrease artifacts in an image produced on a recording medium by the optical printer. The shape of the plurality of cells merges a portion of the optical radiation passing through an individual cell of the spatial light modulator with optical radiation from that of adjacent cell to form a pixel on the recording medium. In one implementation each of the cells of the spatial light modulator independently modulate the optical radiation so as to print horizontally-displaced pixels. When LEDs are used as the colored light source, the light is either first diffused to minimize shadows from electrical contacts on the LEDs, thus removing linear artifacts in the image.
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patent: 5515097 (1996-05-01), Munechika et al.
patent: 5708486 (1998-01-01), Miyawaki et al.
Patent Abstracts of Japan vol. 017, No. 143 (P-1507) Mar. 23, 1993 & JP 04 317040 A (Brother Ind Ltd), Nov. 9, 1992 see abstract.
Nagata M et al. "Liquid crystal shutters for printers" Molecular Crystals and Liquid Crystals, 1986, UK vol. 139 No. 1-2 pp. 143-160 XP002087240.
Chapnik Philip D.
Johnson Bruce K.
Burke Margaret
Epps Georgia
Gaiman Barry
Polaroid Corporation
Stecewycz Joseph
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