Patent ID: 8928716
Filing Date: 2015-01-06
Classification: B41J,G02B,H04N

Abstract:
1. An optical scanning device that scans a plurality of scanned surfaces in a main-scanning direction with a plurality of light beams, the optical scanning device comprising: a light source device including at least one light source and configured to emit a plurality of light beams including a plurality of light beams corresponding to at least process colors; a deflector configured to deflect the plurality of light beams emitted from the light source device; and a plurality of scanning optical systems configured to guide the plurality of light beams deflected at the deflector to the plurality of corresponding scanned surfaces, wherein: one light beam in a first waveband of the plurality of light beams corresponding to the process colors enters one scanning optical system of the plurality of scanning optical systems, the one scanning optical system includes an optical member configured to reflect the one light beam and transmit a light beam in a second waveband different from the first waveband, an angle formed between a normal to an incidence plane of the optical member and orthogonal projection to an assumed plane orthogonal to a direction corresponding to the main-scanning direction of an incident path of the light beam to the incidence plane of the optical member is an angle of 0° or more and an angle of 45° or less, the scanning optical systems of the plurality of scanning optical systems except the one scanning optical system include a reflecting mirror to reflect the corresponding light beam, and the angle is smaller than an angle formed between a normal to a reflecting surface of the reflecting mirror and orthogonal projection to an assumed plane of an incident path of the corresponding light beam to the reflecting surface of the reflecting mirror.