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3. Lens
5mm
7 r_-
n
425.107 mm
(830)
404.179 mm
(950)
15 mm
(830)
30.855 mm
(950)
i9.985
m m
(950)
2970
(830)
4
312.50
28.50 mm (83o)
(950)
350 mm (950)
1-
?
_A
—
u
\
1----
[ B]
[A]
The Lens Assembly consists of 6 internal lenses (950) or 5 internal lenses (830) to transfer the
correctly
oriented
image to the photoelectric
elements
of the CCD. It is possible to
adjust the focus by moving the lens assembly [A].
c Lens>
Focal distance :
43 mm (43.05 ~ 0.32 mm) (950)
38 mm (37.9 Y 0.42) (830)
F
No.
:
F4.5
The above illustration shows the layout necessary to transfer an image from an A3 original
(297 millimeter width) to the CCD [B].
<
ccl)>
Number of effective pixels : 5000 pixels (950)
3648 pixels (830)
Reading length :
312.5 mm (950)
304 mm (830)
Photo signal storage time : 3 msec. (95o)
10 ms (830)
The shading plate [C] corrects light intensity distortion. The light intensity is low at both ends
of the lamp and is also low at the edge of the lens. Therefore, the light in the center is reduced to
make the light intensity uniform.
2-9
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