Dual Lens System - Epson Perfection V700 Photo Service Manual
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Also See for Perfection V700 Photo:
- User manual (157 pages) ,
- Notices and warranty (13 pages) ,
- Specifications (4 pages)
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EPSON Perfection V700 Photo
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.
Table 2-1. Lenses (Resolutions) and Document Types
Lens
Resolution
Document Type
High Resolution
4800dpi
Reflective
Lens
Transparent (with the film area guide) 8.0 in (203.2 mm)
Super Resolution
6400dpi
Transparent (with the film holder)
Lens
Transparent (when DigitalIce is used)
The film holder must be used for scanning with the Super
C A U T I O N
Resolution Lens as it does not support the film area guide.
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.
Operating Principles
Maximum Width
8.5 in (215.9 mm)
215.9 mm
5.9 in (149.9 mm)
149.9 mm
Engine Operation Outline
High Resolution Lens
Document
Carriage shaft
Figure 2-7. When using the High Resolution Lens
Super Resolution Lens
Document
Carriage shaft
Figure 2-8. When using the Super Resolution Lens
Revision A
CCD
Holder Lens
Carriage
CCD
Holder Lens
Carriage
24
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