Structural Optimization of Receiving System Based on Optimal Field of View for Shallow Sea Laser Measurement

Using the penetration of blue-green band (532 nm) laser in seawater, airborne laser scanning ranging technology can be applied to shallow sea measurements. The penetration properties of lasers due to the complex optical properties of seawater are also limited. The decrease of echo energy received by the sensor will greatly limit the accuracy of laser seabed survey. In response to this phenomenon, we propose a new structural design method combined with the optimal field of view (FOV) for shallow sea measurements to optimize the traditional receiving system to improve the laser receiving depth echo signal receiving capability. The simulation experiment is carried out by ZEMAX optical software. Experimental results show that the improved receiving system can effectively reduce spherical aberration and coma caused by spherical lens, and improve the imaging quality of the receiving system and the measurement accuracy of the shallow seabed.