Scanner Parts
carriage
(at home
position)
transportation lock
SCSI ID
terminator switch
dial
USB
SCSI interfaces
interface
option connector
(ADF/TPU)
Scanner Specifications
Scanner
General
Scanner type
Flatbed, color
Maximum
12.2
document size
A3 or Letter (The reading area can be
specified from your software)
Photoelectric
device
Color MatrixCCD line sensor
Effective pixels
19520 27520 pixels at 1600 dpi,
100% scaling
document cover
document table
control
panel
] Start button
optional interface slot
AC inlet
transportation lock
17.2 inches (310
437 mm)
Maximum hardware
resolution*
1600 dpi (main scan)
3200 dpi with Micro Step Drive
(sub scan)
*The maximum hardware resolution of 1600
using EPSON's Micro Step Drive technology
Output resolution 50 dpi - 12800 dpi
50 to 6400 in 1 dpi increments
Zoom
50 to 200% in 1% increments
Maximum interpolated
resolution
12800 12800 dpi
Line art
1 bit per pixel
Speed (1600 dpi,
Color: 13.2 msec/line (approx.)
draft mode)
Grayscale: 4.5 msec/line (approx.)
Line Art: 4.5 msec/line (approx.)
Color separation
RGB color filters on CCD
Reading sequence Monochrome: One-pass scanning
Color byte sequence: One-pass
scanning (R, G, B)
Color line sequence: One-pass
scanning (R, G, B)
Command level
ESC/I-B8
Optical density
3.6 Dmax
Color depth
42-bit internal/42-bit external
Grayscale depth
14-bit internal/14-bit external
Pixel depth
14 bits per pixel (14 bits per pixel
input, 1 to 14 bits per pixel output)
Brightness
7 levels
Line art settings
Fixed threshold
TET (Text Enhancement Technology,
enable/disable selectable)
Area separation
AAS (Auto Area Segmentation,
enable/disable selectable)
Digital halftoning 3 halftoning modes (A, B, and C)
4 dither patterns (A, B, C, and D) for
bi-level and quad-level data
(2 downloadable dither patterns)
Gamma correction 2 types for CRT display
3 types for printer
1 type user-defined
Color correction
1 type for CRT display
3 types for printer (available in color
byte sequence mode and color line
sequence mode)
1 type user-defined
8/00
EPSON Expression 1640XL
3200 dpi is achieved
EPSON Expression 1640XL
- 1
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