User's Manual

No ASR – NP – 26819 – 01
14
CONFIDENTIAL
12. Image quality
12-1 MTF at full color mode
Minimum 35%, typical 70%
MTF means ratio between 0.5line pare and 3.0 line pare
12-2 Magnification of image
Main scanning direction: Within +/- 3.2%
Vertical scanning direction: Within +/- 3.2%
12-3 Image skew
+/- 1.5 degrees see figure 3-1 at Normal flat card
12-4 Target value of white level
The target value is 229 when the white reference card is read.
The white reference card is “S38A497A01”.
12-5 Deformation by transfer of card (extend and shorten)
Long wave deformation: +/- 3 % (accuracy of card length)
Momentary deformation: +/- 25 %
(at 25.5mm from top of card and 17mm from back end)
Momentary deformation:
The accuracy of every 2mm regions is within following.
-2 ≤ X ≤ +2[pixel] : No object.
-4 ≤ X < -2[pixel] , +2 < X ≤ +4[pixel] : Within 4 points.
-8 ≤ X < -4[pixel] , +4 < X ≤ +8[pixel] : Within 2 points.
2mm region contains 48 pixels at 600dpi.
Deformation of main scanning direction: within +/- 8 pixels (See Figure 3-2)
Used card: Thickness is 0.76 mm, flat and no emboss card.
B