| 摘要 |
PURPOSE:To easily remove a heterotripia phenomenon by rotating only a small secondary image forming lens while fixing a line sensor. CONSTITUTION:A pupil adjustment, i.e. optical axis alignment between a focusing unit and the front plate of a camera body is performed. An adjustment is made so as to project the image of aperture parts 4a and 4b of a stop 4 in the axit pupil S of a photographic lens 1 correctly. Actually, a pin 18 for field lens adjustment is inserted into the hole 3a and cut hole 3b of the field lens 3 to make the field lens 3 eccentric in parallel, and the lens is fixed with an adhesive. Shading is corrected by using a uniform brightness surface chart and an irregularity in the quantity of light on the line sensor 6 and an irregularity in the sensitivity of the line sensor 6 are corrected by an EEPROM at a time. A secondary image forming lens 5 is energized counterclockwise by a spring and to press a positioning part 5c against a screw 19 for rotation adjustment, which is turned in this state to vary the angle of rotation of the secondary image forming lens 5 to a unit body 14, thereby adjusting the heterotripia phenomenon. |
