Canon CANOSCAN D660U Service Manual page 32

CHAPTER 2
2. Scanning by means of VAROS
There placed in order of the CCD, refraction glass, lens, and mirrors in the scanning unit.
The refraction glass is equipped with a solenoid to control the direction of the refraction glass.
When the host computer commands 601 dpi or higher resolution to scan a film using FAU, the
ASIC selects to use VAROS for scanning.
Firstly scans before moving the direction of the refraction glass at 600 dpi in the horizontal
scanning direction and 1200 dpi in the vertical scanning direction. The scanned image data is
stored in the host computer as a temporary data.
CCD
2 - 12
Refraction glass
Figure 2-10
COPYRIGHT © 2000 CANON INC.
Vertical scan
Horizontal scan
CANOSCAN D660U REV.0 JULY 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
Film