Patent ID: 7379222

Claim:
An optical apparatus for irradiating a surface to be scanned with laser light, comprising: rotary deflecting means for deflecting laser light emitted by a laser emitting means in a shape of a plane; a mirror for reflecting the laser light: an enclosure for housing the minor; a first mirror supporting part capable of moving in a direction parallel to the laser light irradiated toward the mirror and supporting the mirror; a second mirror supporting part capable of supporting the mirror in such a way that the mirror can rotate around an abutting part which abuts against both end portions of a reflecting surface of the mirror on a line at which the laser light is in close agreement with a scanning line with which the mirror is scanned; force applying means for applying a force to the mirror at the abutting part; and swinging means for swinging the mirror around the abutting part, wherein the swinging means is provided on the first mirror supporting part.