A METHOD AND APPARATUS FOR FUNCTIONALLY TESTING A LASER RANGEFINDER.

摘要

A laser rangefinder, where the laser is of the passive Q-switched type, is to be functionally tested. In a method and apparatus for functionally testing it there is provided that the excitation voltage for initiating the laser is raised above the normal voltage, so that the laser sends two light pulses where it normally sends a single one, and that the pulses are interpreted as a pulse sent from the rangefinder and a received reflected pulse. A high-voltage unit (2) for excitation voltage to the laser is disposed with a feedback circuit in which there is included a voltage divider (R1, R2, R3), where the degree of voltage division can be changed by means of a switch (5) such that during testing the excitation voltage is increased and the laser thus sends two light pulses.