Patent ID: 7602541
Filing Date: 2009-10-13
Classification: G02B

Abstract:
1. An optical beam scanning apparatus comprising: a light source configured to emit one or plural luminous fluxes, a pre-deflection optical system configured to form a luminous flux emitted from the light source to image the luminous flux as a line image in a prescribed direction corresponding to a main scanning direction, a scanning unit configured to scan the imaged luminous flux by the pre-deflection optical system against a scanning subject, and a post-deflection optical system configured to image the luminous flux scanned by the scanning unit on the scanning subject, 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 one reflecting surface forming the scanning unit, wherein at least two sheets of flat plate configured to transmit the luminous flux scanned by the scanning unit are provided in the post-deflection optical system.