OPTICAL DEVICE, OPTICAL SCANNER, AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide an optical device configured to easily change natural oscillation frequency or oscillation mode of a long mirror, and to prevent image density unevenness with high accuracy in a simple and low-cost configuration.SOLUTION: A folding mirror 8, as a long mirror, is supported by a mirror receiving section including a reflection surface receiving section 14 and a mirror end face receiving section 17, and is fixed to an optical housing 1 with its top pressed by a mirror presser member 9. A plurality of mirror end face receiving sections 17 are arranged at intervals in a mirror longitudinal direction, and the positions thereof can be changed. A plurality of mirror presser members 9 are arranged at intervals in the mirror longitudinal direction, and positions thereof can be changed.