Image Banding Based on Opto-Mechanics Considering Laser Scanning Unit in Printing Systems
Abstract:Consumer's product selection measures are being shifted from the units' operational performance to overall performance. High quality image that required “no banding, good color alignment, etc.” which used to be important evaluation indices, now became vital performance factors. To satisfy customer's needs about image quality, development of evaluation tools for measurement of image arrangement or banding is urgently needed and each company's own up-to-date special tools and standards are used in manufacturing goods. One of the major image quality issues is known as banding which is related to the fluctuations of the internal printer components. Accumulated errors from instability of controlling belts or tolerance of gears operating in photographic and fusing systems make thick band characteristic which is low frequency banding. This paper describes the phenomenon of high frequency banding from Laser Scanning Unit (LSU) which causes thin banding characteristic. As printers' trend move towards smaller size, color tandem type of LSU is becoming more compact than it was. Image banding occurred due to optomechanic positions, characteristics of optic parts (lens, mirrors, etc.) and beam path in LSU. Image banding evaluation analysis with some cases are compared and discussed on experimental and analytic results.
Document Type: Research Article
Publication date: January 1, 2009
For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.
Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.
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