| 摘要 |
PROBLEM TO BE SOLVED: To effectively correct the bending of a scanning line in an optical scanner in which a luminous flux from a light source is made incident to a deflection and reflection face diagonally with respect to the rotation axis of the deflection and reflection face, deflected at a constant angular velocity, and a plane including the incident direction from the light source side to the deflection and reflection face and the rotation axis is optically scanned with symmetry. SOLUTION: In the designing step of an optical scanner, the scanning and imaging optical system is designed in a way that the bending of the scanning line peculiar to the optical scanner, in which the scanning and imaging optical system is designed without taking the effect of a correction refraction face for correcting the bending of the scanning line into consideration, is derived as a designing value, the peculiar tilt of one or more correction refraction faces for correcting the derived bending of the scanning line peculiar to the optical scanner is derived as a designing value for every incident position of a deflected luminous flux on one or more correction refraction faces, and on the basis of the data of the scanning and imaging optical system designed without taking the effect of the correction refraction face into consideration and on the peculiar tilt of one or more correction refraction faces derived as a designing value. COPYRIGHT: (C)2006,JPO&NCIPI |
