Patent ID: 7957046
Filing Date: 2011-06-07
Classification: G02B

Abstract:
1. An optical beam scanning apparatus comprising: a light source to emit one or plural luminous fluxes, a pre-deflection optical system to form a luminous flux emitted from the light source to image the luminous flux as a line image in a main scanning direction, a scanning unit configured to scan the imaged luminous flux by the pre-deflection optical system against a scanning subject, having at least one reflecting surface in which a width of the luminous flux made incident on the scanning unit from the pre-deflection optical system is wider than a width of the one reflecting surface forming the scanning unit, and a post-deflection optical system to image the luminous flux scanned by the scanning unit on the scanning subject, including at least one optical element configured by a resin flowed into a molding die, the resin having a prescribed shape, the at least one optical element having a side in which a residual strain is generated, the side being located to a light incidence side where the luminous flux enters into the scanning unit.