| 摘要 |
Disclosed is a scanning optical system including a light source that emits a light beam, a deflector that deflects a light beam emitted from the light source to scan in a predetermined direction, an scanning lens system that allows the light beam deflected by the deflector to pass through and converges the light beam on a surface to be scanned, and a diffracting element having a diffracting surface that functions to correct a chromatic aberration of the scanning lens. The diffracting element is arranged between the deflector and the surface to be scanned.
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