Patent ID: 6134210
Filing Date: 2000-10-17
Classification: G11B,H01S

Abstract:
A laser beam emitting device, comprising:a laser beam source for emitting a laser beam having a predetermined effective optical path region;a light-receiving element positioned outside the effective optical path region of the laser beam emitted by the laser beam source and having at least two light-receiving regions for detecting intensity of the emitted laser beam; andadjustment means for adjusting the output of the laser beam source in response to the intensity of the emitted laser beam detected by the light-receiving element, wherein the light-receiving element having the at least two light-receiving regions is capable of providing at least two sensitivity levels, and wherein the adjustment means adjusts the output of the laser beam source in response to the intensity of the emitted laser beam detected by at least one of the light-receiving regions of the light-receiving element.