Light beam scanning device, image forming apparatus, and scanning line adjusting method

A light beam scanning device that scans a luminous flux to a scanned surface, the device comprising:

• irradiating means for irradiating the luminous flux;
• deflecting means for deflecting the luminous flux irradiated by the irradiating means;
• guiding means for guiding the deflected luminous flux to the scanned surface, the guiding means having a set of mirrors;
• scanning line curve adjusting means for bending a first mirror of the set of mirrors so as to correct a curve in a scanning line on the scanned surface;
• and
• scanning line tilt adjusting means for changing orientation of a second mirror of the set of mirrors so as to correct a tilt in the scanning line on the scanned surface.

A method of adjusting a curve and a tilt in a scanning line scanned by a light beam scanning device,

• the light beam scanning device including:
• a light source configured to irradiate a luminous flux;
• a deflector configured to deflect the luminous flux irradiated from the light source;
• and an optical system disposed on an optical path of the deflected luminous flux and configured to guide the deflected luminous flux to a scanned surface, the optical system having a set of mirrors, the scanning line adjusting method comprising:
• bending a first mirror of the set of mirrors so as to correct a curve in the scanning line on the scanned surface;
• and
• changing orientation of a second mirror of the set of mirrors so as to correct a tilt in the scanning line on the scanned surface.