Patent ID: 8107148
Filing Date: 2012-01-31
Classification: G02B

Abstract:
1. A curvature correction device used in an optical scanning unit that optically scans a scan target with a light beam, the optical scanning unit including a light beam emitter configured to emit the light beam, a deflection unit configured to deflect the light beam in a main scanning direction of the optical scanning unit, and a reflection mirror configured to reflect the light beam, the curvature correction device comprising: a holder configured to hold the reflection mirror in a state in which the reflection mirror is forcibly bent in a first direction; and a first pushing unit configured to push the reflection mirror held by the holder to bend the reflection mirror in a second direction opposite the first direction in which the reflection mirror is forcibly bent by the holder; a second pushing unit configured to directly push an end portion of the reflection mirror to adjust an inclination of the reflection mirror, the curvature correction device being configured to correct the curvature of the main scanning line on the surface of the scan target by adjusting an amount at which the first pushing unit pushes the reflection mirror, and the holder including a stiffness relatively larger than a stiffness of the reflection mirror, wherein