An optical deflector of the present invention includes a movable mirror and torsion bars supporting the mirror and formed integrally with the mirror. The mirror reciprocatingly vibrates to reflect a light beam to thereby deflect it. The mirror is curved in the form of an arch in a section including at...http://www.google.com.au/patents/US20030053156?utm_source=gb-gplus-sharePatent US20030053156 - Optical scanning device and image forming apparatus using the same
