Patent ID: 7463395

Claim:
A method for recording information into a rewritable thermal label of a non-contact type by irradiation with a laser beam, the method comprising, when a prescribed drawing is conducted by irradiation with a laser beam focused on the rewritable thermal label of a non-contact type using an optical scanning apparatus, driving the optical scanning apparatus continuously without activating oscillation for the laser light and conducting the drawing by activating the oscillation for the laser light and scanning with the laser light only when a virtual laser beam which is defined as a locus of a laser beam which is emitted if the oscillation for the laser light is active moves at a substantially uniform speed, wherein the optical scanning apparatus comprises a source of the laser light, scanning mirrors which are driven for rotation and are used for scanning with the laser light emitted from the source and an optical system for correction of a focal distance to focus the laser light scanned by the scanning mirrors and, when a prescribed drawing is conducted by irradiation with the laser beam focused on the rewritable thermal label of a non-contact type, the scanning mirrors are driven continuously and the drawing is conducted by activating the oscillation for the laser light and scanning with the laser light only when the scanning mirrors move at a substantially uniform speed.