Abstract: Energy distribution at a section of a laser beam is leveled by causing the laser beam, emitted by a continuous wave Q-switch pulse from a laser oscillator having an acousto-optic Q-switch element, to pass through a mask having a mask pattern. The laser beam having passed the mask is reflected by a pair of reflection mirrors provided on a pair of galvanometers. The reflected laser beam passes through an objective lens and is focused on a processing object. A desired character or sign is marked on the processing object through a scanning with the laser beam focused on the processing object by driving a pair of galvanometers.

Abstract: A laser marking system comprises a continuous-wave (CW) pumped Q-switch pulse laser and a laser controller. The Q-switch element switches on and off according to a repetition control signal received from the laser controller. The repetition control signal comprises an emission period in a repetition rate. The CW-pumped Q-switch pulse laser emits the laser beam through the Q-switch element during the emission period. The emission period or duty factor of the repetition control signal is adjusted such that the CW-pumped Q-switch pulse laser emits a pulse laser beam comprising a plurality of emission pulses during the emission period. The pulse laser beam is used to generate a scanning pulse laser beam which is focused on the workpiece to be marked in a desired pattern.