Patent ID: 7508856

Claim:
A laser light output control apparatus comprising: a plurality of laser light output control systems including: a laser light source capable of receiving supplying of current via a power supplying path from a power source and irradiating laser light; a photo-detecting device capable of receiving the light irradiated from the laser light source and outputting a monitor current dependent on the amount of light received; a conversion circuit capable of converting the monitor current into a voltage value; and a control circuit capable of controlling the current supplied to the laser light source based on the voltage value outputted from the conversion circuit so that the intensity of laser light irradiated from the laser light source changes to a predetermined value, wherein the respective conversion circuits of each said output control system have a fixed resistor and a variable resistor connected in series to each other, and wherein at least one of the fixed resistors of each said plurality of laser light output control system has a resistance value different from the fixed resistors of the other plurality of laser light output control systems.