Epson PERFECTION V700 PHOTO - Placing Documents or Photos

EPSON Perfection V700 Photo Revision A
Operating Principles Engine Operation Outline 24
2.1.4 Dual Lens System
Perfection V700 Photo is equipped with two types of lens which enable
two different resolutions. The Lens motor switches between the two
lenses. Depending on document type selected on the scanner driver, one
of the two lenses (resolution) is automatically selected.
Dual Lens System Operation
Both of the two lenses are mounted on the Holder Lens. The holder is
usually located close to the Carriage shaft to use the High Resolution
Lens. When the Film Holder or DigitalIce is used to scan a transparent
document, the Lens motor moves the Holder Lens to use the Super
Resolution Lens.
Because of the difference in focal length of the two lenses, a scanning
area reflected on the CCD varies by each lens. As the number of CCD
pixels differs between the two areas, the different resolutions can be
obtained.
Figure 2-7. When using the High Resolution Lens
Figure 2-8. When using the Super Resolution Lens
Table 2-1. Lenses (Resolutions) and Document Types
Lens Resolution Document Type Maximum Width
High Resolution
Lens
4800dpi Reflective 8.5 in (215.9 mm)
Transparent (with the film area guide) 8.0 in (203.2 mm)
Super Resolution
Lens
6400dpi Transparent (with the film holder) 5.9 in (149.9 mm)
Transparent (when DigitalIce is used)
C A U T I O N
The film holder must be used for scanning with the Super
Resolution Lens as it does not support the film area guide.
Holder Lens
CCD
Carriage
Carriage shaft
215.9 mm
Document
High Resolution Lens
CCD
Carriage
Carriage shaft
Super Resolution Lens
149.9 mm
Document
Holder Lens