Patent ID: 7843618

Claim:
A method of controlling an image-forming apparatus comprising an optical deflection apparatus including an optical deflector in which an oscillator is supported by an elastic support member to be oscillatable about a support substrate, a temperature controller for controlling a temperature of the optical deflector, at least one light source, and a modulator for modulating the light source, wherein light from the light source is deflected by the optical deflector, and at least a part of the light is irradiated on an object to be irradiated to form an image, the method comprising: controlling the temperature of the optical deflector by the temperature controller by using a modulation signal from the modulator so as to set the temperature of the optical deflector at a predetermined temperature in a unit compensation time, wherein a half of an oscillation period including a drawing time for irradiating the light to the object to be irradiated and a non-drawing time for not irradiating the light to the object to be irradiated is set as the unit compensation time.