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电控液晶光栅在卫星激光通信、激光雷达的光束指向应用中具有体积小、光束灵活可控的优势。而获取电控液晶光栅对光波前的相位调制分布则是评价液晶光栅性能的关键。提出液晶光栅调制波前相位的共轭移相干涉测量技术,通过实验对比验证了实测远场分布与近场相位计算远场分布的一致性,由此可实现由近场相位测量的光束指向控制新方法。
Electronically Controlled Liquid Crystal Grating has the advantages of small size and flexible and controllable beam in the satellite laser communication and laser beam pointing applications. Obtaining the phase modulation distribution of the electrically controlled liquid crystal grating to the light wave front is the key to evaluate the performance of the liquid crystal grating. The phase shift of conjugate phase-shifted interferometry using liquid crystal grating was proposed. The experimental results show that the measured far-field distribution and the near-field phase are consistent with the far-field distribution. Thus, the beam pointing control new method.