Patent ID: 6590912
Filing Date: 2003-07-08
Classification: H01S

Abstract:
A semiconductor laser driving apparatus that drives a semiconductor laser that emits laser light for optical scanning, the apparatus comprising:a light amount detecting section which detects a light amount of a laser light emitted from the semiconductor laser; a temperature detecting section which detects a laser section temperature, which is one of a temperature of a light-emitting section of the semiconductor laser and a temperature of a vicinity of the semiconductor laser; a temperature adjusting section which adjusts the laser section temperature; a light amount control section which, while the semiconductor laser is driven in a manner the same as for actual optical scanning, controls driving of the semiconductor laser such that a light amount detected by the light amount detecting section becomes equal to a predetermined target light amount; and a temperature deciding section that, while control is performed by the light amount control section, causes the laser section temperature to be altered by the temperature adjusting section, and, if a light amount detected by the light amount detecting section is within a predetermined error span, decides on the laser section temperature as a setting temperature for optical scanning of the semiconductor laser.