1995
DOI: 10.1117/12.194838
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Modeling vibration-induced halftone banding in a xerographic laser printer

Abstract: In a raster scanning printer, a laser beam is scanned across a photoreceptor in a direction perpendicular to the photoreceptor motion. When there is vibratory motion of the photoreceptor or wobble in the polygon mirror, the raster lines on the photoreceptor will not be evenly spaced. We analyze the positioning error and show that fractional raster spacing error is equal to photoreceptor fractional velocity error. These raster position errors can result in various print defects, of which halftone banding is the… Show more

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Cited by 14 publications
(8 citation statements)
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“…The new is given by (22) We now have the complete setup to apply DBS in this new framework. Finally, we look at results from this approach.…”
Section: Update Equationmentioning
confidence: 99%
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“…The new is given by (22) We now have the complete setup to apply DBS in this new framework. Finally, we look at results from this approach.…”
Section: Update Equationmentioning
confidence: 99%
“…Firstly, all types of modulation schemes, including regular binary halftoning, are treated exactly the same, and secondly, moving from one print engine to another is simply a matter of changing print engine parameters and making a few additional measurements to re-calibrate the algorithm. Models for the EP process have also been used by Sonnenberg [21] to optimize the parameters of the laser beam for writing line graphics and isolated dots, by Loce [22] to analyze vibration induced banding in laser printers, and by Furuya [23] to determine threshold laser power for the development of a single dot.…”
mentioning
confidence: 99%
“…Loce and Lama [13] employed exposure and xerographic models to examine vibration induced halftone banding in image bar printers. Loce, Lama and Maltz [14] examined the effects of raster position error in a xerographic laser printer and focused on the parametric dependences of halftone banding in the resulting prints. The present paper is concerned with vibratory motion in input scanners.…”
Section: Introductionmentioning
confidence: 99%
“…Chen addressed this in his doctoral dissertation, stating that the main reflectance fluctuations in output can be traced as gear transmission errors, e.g., eccentricity and tooth profile error, and their spatial frequencies are determined by the parameters of a gear train in a printer mechanism. Loce et al also showed that fractional raster spacing error is equal to the photoreceptor fractional velocity error. Some articles discussed that the wobble or facet angle errors of a polygon mirror periodically produce uneven spacing of the raster lines on a photoreceptor .…”
mentioning
confidence: 97%
“…Toner particles are then developed onto the photosensitive drum. As Loce and Lama noted, the velocity of the organic photoconductor (OPC) drum is “not constant in time, which might be modulated directly by errors of gears, timing belts and motors, and indirectly, by structural vibrations induced by gears, fans, solenoid noise, finisher operations, etc.” Loce et al stated that “when there is vibratory motion of the photoreceptor or wobble in the polygon mirror, the raster lines on the photoreceptor will not be evenly spaced.” These scanline spacing variations are represented in the printed images as increased or decreased spaces between lines of toner.…”
mentioning
confidence: 99%