Apparatus for measurement water depth including a piezoelectric scanning assembly

摘要

A Laser Airborne Depth Sounder (LADS) system for the measurement of water depth is disclosed, the system includes a transmitter and a receiver of laser light having at least two wavelengths so as to receive a first reflection from a water surface and a second reflection from a water bottom, and a mirror ( 32 ) adapted to reflect the second reflection laser light and rotate around a major axis ( 34 ) and minor axis ( 36 ) where the rotation of the mirror ( 32 ) around the minor axis ( 36 ) is provided by a piezo electric actuator ( 68 ). The piezo electric actuator ( 68 ) drives the mirror ( 32 ) around the minor axis ( 36 ) through a mechanical level ( 72 ).