| 摘要 |
PURPOSE:To attain positioning precisely without driving a image sensor by forming a light emitting element in one body with the image sensor and projecting the emitted light on a prescribed position to adjust the arranging position of the image sensor. CONSTITUTION:The image sensors 9a, 9b, 9c provided with the light emitting diodes 7 (7a1 and 7a2, 7b1 and 7b2, and 7c1 and 7c2) are arranged in a line in the main scanning direction and fixed on a common board 10. To position these image sensors 9a-9c, a screen 20 is arranged on the focal surface of a lens 6 and the photodetecting elements 12a-12d are arranged on the screen 20 so as to detect light from the light emitting diodes 7. If the diodes 7a1 and 7a2 on the image sensor 9a are turned on, the light from respective diodes 7a1, 7a2 is precisely projected to the photodetecting elements 12a, 12b when the image sensor 9a is precisely formed in the main scanning direction. But if the image sensor 9a is inclined from the main scanning direction, one or both the photodetecting elements 12a, 12b can not detect the light, so that the position is adjusted by loosening screws 11. |
