Canon CANOSCAN D660U Service Manual

Also see for CANOSCAN D660U: Brochure & specs User guide User guide Getting started guide User guide

Canon CANOSCAN D660U Service Manual Manual pdf 30 page image

CHAPTER 22 - 10 COPYRIGHT © 2000 CANON INC. CANOSCAN D660U REV.0 JULY 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)II. OPTICAL SYSTEMA. OutlineWhen scanning are flective document, the scanning lamp in the scanning unit exposes thedocument and focuses the reflected light from the document on the CCD. When scanning afilm at 601 dpi or higher using FAU, FAU lamp built in the document cover exposes the film,and optical axis is shifted by a half pixel in the horizontal scanning direction by means ofVAROS unit, and the images before and after the optical axis is shifted are composed by thehost computer.Figure 2-8-2Figure 2-8-1q VAROS Unitw CCDe Beltr Drive Motort Scanning Lamp12345