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在目标跟踪系统中,由于大气湍流的影响导致光波振幅和相位起伏。为了提高跟踪性能,降低大气湍流造成的光斑倾斜成为了首要目标,而高速倾斜镜(FSM)则是达成这一目标的关键器件。文中介绍的高速倾斜镜利用超磁致伸缩材料(GMM)作为位移驱动元件,通过线圈的电流产生磁场控制材料的伸缩,从而驱动倾斜镜的偏转。该倾斜镜已经被应用于激光大气传输倾斜校正系统中,使湍流造成的倾斜减少了90%,光斑稳定度和光斑质量得到了明显提高。
In the target tracking system, the amplitude and phase of lightwaves fluctuate due to the influence of atmospheric turbulence. In order to improve tracking performance, reducing the light flare caused by atmospheric turbulence became the primary goal, and high-speed tilt mirror (FSM) is the key to achieve this goal device. The high-speed tilting mirror introduced in the article uses the giant magnetostrictive material (GMM) as the displacement driving element, and the deflection of the tilting mirror is driven by the magnetic field of the coil to control the expansion and contraction of the material. This tilting mirror has been used in laser atmospheric transport tilt correction systems to reduce the turbulence-induced tilt by 90% and improve spot stability and spot quality.