激光雷达
大气(单位)
遥感
自适应光学
计算机科学
大气光学
光学
气象学
物理
地质学
作者
Xue-chun Tan,Zhichao Wu,Zhu Liang
摘要
Since atmosphere turbulence has an effect on laser propagation, it causes wavefront error usually , changes intensity and
coherence of laser, disturbs detection of lidar. The adaptive optical system has broad application in the field of laser
transmission because it can adjust characters of optical system ,detect and correct the wavefront error at the same time.
Adaptive optics technology uses deformable mirrors to perform dynamic phase modulation and endow optical system the
ability to decrease the influence of dynamic wavefront errors. In this paper ,a correction method of the micro-miniature
adaptive optical system based on Micro Electromechanical System (MEMS) technology is proposed by analyzing the
working theory of the adaptive optical system. An experimental system including deformable mirror based on Micro
Electromechanical System (MEMS) technology is designed to correct a factitious wavefront error.The influence function
and voltage-deflection curve are researched, and the voltage control matrix is educed. By using the voltage control , the
static wavefront aberration is corrected. Several important capabilities of deformable mirrors is tested. With the voltage
control matrix, the corrected capability of the adaptive optical system is achieved successfully .The experimental results
show that the adaptive optical system can preferably correct the wavefront error, that has small volume and steady
capability, and greatly improve the capability of lidar detection.
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