A method and apparatus to automatically control an output power of a laser diode, include generating an error voltage between an output voltage of the laser diode sampled during an automatic power control period and a reference voltage, and performing proportional-integral processing on the error voltage to generate a compensated control voltage and applying the compensated control voltage to the laser diode.

 
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< Laser emitter and laser scanning device

> Three-dimensional shape measuring method and measuring apparatus thereof

~ 00499