| 摘要 |
A sensor frame has a first frame portion and a second frame portion, and a rod lens array extending in a longitudinal direction is arranged and fixed between the first and second frame portions. An L-shaped plate having a first plate-shaped portion and a second plate-shaped portion is arranged below the rod lens array. A sensor substrate is placed on the first plate-shaped portion, and a sensor IC is held on the sensor substrate so as to receive rays of light reflected on a manuscript and passing through the rod lens array. The second plate-shaped portion is fixed on an end surface of the first frame portion by a plurality of screws arranged along the longitudinal direction. A diameter of each screw hole formed in the second plate-shaped portion is larger than that of the corresponding screw so as to allow that the height of the sensor IC is adjusted by moving up and down the second plate-shaped portion before the fixing of the second plate-shaped portion. Because the position of the sensor IC merely held on the sensor substrate is adjusted, the distance between the rod lens array and the light receiving element can be correctly adjusted, and light and shade information of an image drawn in a manuscript can be correctly obtained in the image sensor.
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