Patent ID: 7616671
Filing Date: 2009-11-10
Classification: H01S,H04N

Abstract:
1. A light source device comprising: a light source that emits a laser beam; a power supply drive circuit that pulse-drives the laser beam; a wavelength conversion element that converts a wavelength of a laser beam into a predetermined wavelength; a photodetector that detects an intensity of the laser beam emitted from the wavelength conversion element; and a control section that controls a drive condition of the laser beam emitted from the wavelength conversion element based on the intensity detected by the photodetector; an optimization setting section located within the control section that, in response to the intensity detected by the photodetector in a present pulse drive condition being outside a predetermined range, extracts an optimum pulse drive condition, changes the present pulse drive condition to an intermediate pulse drive condition, the intermediate pulse drive condition being different from both of the present pulse drive condition and the optimum pulse drive condition, sets the extracted optimum pulse drive condition to the drive condition of the laser beam, and after a predetermined period of time, restores the present pulse drive condition.