In this elaborate system, the optics can become misaligned, and the scanner needs to be somewhat deep to accommodate the mechanism.
Illumination is provided by a closely packed row of red, blue, and green LEDs to create white light.
LEDs draw far less power used in CCD scanners. CIS also eliminates the elaborate housing typical of CCD systems, so a scanner can be thinner than a laptop. 2000 ZD Inc. All rights reserved. ZD Inc. Editorial items appearing in ZDNet that were originally published in the US edition of PC Magazine are the copyright property of Ziff Davis Media Inc. or its suppliers. Ziff Davis Media Inc. All Rights Reserved.