A METHOD OF MAINTAINING A PREDETERMINED BEAM DIRECTION IN A LASER PULSE TRANSMITTER AND AN APPARATUS FOR CARRYING OUT THE METHOD

摘要

The invention relates to a method and an apparatus for maintaining a predetermined beam direction in a laser pulse transmitter having a laser resonator including a laser rod (1) with a rotating prism (2) at one end and output coupler (3) at its other end, as well as a flash lamp (4) which is energized to emit a flash pulse for pumping the laser rod (1) with light energy. In accordance with the invention, the deviation of the beam from the predetermined beam direction is measured with the aid of a measuring circuit (13-18), subsequent to which the working point of the laser pulse transmitter is adjusted in response to the magnitude and polarity of the deviation to a predetermined working point corresponding to the predetermined beam direction, e.g. by altering the flash pulse energy.