| 摘要 |
PURPOSE:To make respective linear reading parts of photodetectors coincident with the same straight line with high precision, by providing an adjusting means which moves photodetectors in the direction of the optical path and vertically when plural solid-state image pickup elements are arranged on the same straight line. CONSTITUTION:Solid-state photodetectors 8S, 8R, and 8L such as CCDs have linear reading parts 8S1, 8R1, and 8L1, and corresponding lenses 9S, 9R, and 9L are arranged in front of them. Left and right optical systems 9L, 8L, 9R, and 9R are moved back and forth on an optical axis X-X on a basis of central optical systems 9S and 8S to perform focusing. Inclination errors of respective linear reading parts 8S1, 8R1, and 8L1 of photodetectors to horizontal and vertical faces are corrected, thus making three linear reading parts coincident with the same straight line. |
