Laser diode controller, especially for laser treatment device, has microcontroller that compares actual signal output from monitor diode with demand signal to derive regulated drive

摘要

The controller has at least one laser diode (11) with at least one associated monitor diode (13) for monitoring the optical output of the laser diode and a drive circuit for the laser diode. The drive circuit is a microcontroller (2) that forms part of a closed control loop with the laser and monitor diodes for regulating the optical laser power, whereby the monitor or actual signal output by the monitor diode is compared with a demand signal by the microcontroller to derive a regulated drive signal (8) determining the laser diode power.