Patent ID: 8520711
Filing Date: 2013-08-27
Classification: G06K,H01S

Abstract:
1. An optical device comprising: a light source that emits a plurality of laser beams; a detecting unit that detects the laser beams emitted from the light source and converts light amounts of the detected laser beams into voltage values to be output; a first storage unit that stores in advance a light amount to be output for each of the laser beams and the voltage value corresponding to the light amount in an associated manner; a second storage unit that stores in advance a value indicating light use efficiency of an optical system that guides the laser beams to a surface to be scanned for scanning; a calculating unit that calculates a target voltage value, which is the voltage value to be output from the detecting unit when the surface to be scanned is irradiated with the laser beam at a preset target light amount, for each of the laser beams based on the light amount and the voltage value, which are stored in the first storage unit, and also based on the value indicating the light use efficiency stored in the second storage unit; and a control unit that controls emission power for each of the laser beams emitted from the light source so that the voltage value output from the detecting unit approaches the target voltage value calculated by the calculating unit.