| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical scanner that can suppress a sound generated due to the rotation drive of a rotary deflector from being transferred to the outside of the device, and an image forming apparatus including the same.SOLUTION: In an exposure device 6 that is an optical scanner including a light source that emits a light beam, a polygon scanner 60 that is a rotary deflector that reflects, while rotating, the light beam emitted from the light source and deflects the light beam to perform optical scanning, an optical system forming member that forms a path of the light beam, and a sound absorber 40 that is a resonator having a resonance frequency matched to that of a sound generated due to the rotation drive of rotary deflector, a space in which the polygon scanner 60 is installed is a sealed space 50, and the sound absorber 40 is installed to absorb a sound in the sealed space 50. |
