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为实现基于液晶空间光调制器的非机械式光束智能控制,利用像素个数为1920×1080的硅基液晶空间光调制器搭建了一个实验系统。该系统能在空间内实现大角度、高衍射效率、连续指向的单光束,同时还可将入射光分成2、3、4、5束并单独控制每个分光束的偏转角度。介绍了空间光调制器的相位调制原理、理论模型,验证了光束偏转控制及分光束功能,分析测试系统的光路及原理,最后对实验结果进行总结并提出建议与展望。
In order to realize the non-mechanical beam intelligent control based on liquid crystal spatial light modulator, an experimental system is built by using a liquid crystal spatial light modulator with a number of pixels of 1920 × 1080. The system can achieve large-angle, high diffraction efficiency and continuous pointing single beam in space, and can also split the incident light into 2, 3, 4 and 5 beams and separately control the deflection angle of each sub-beam. The phase modulation principle and theoretical model of the spatial light modulator are introduced. The beam deflection control and the function of the sub-beam are verified. The optical path and principle of the test system are analyzed. Finally, the experimental results are summarized and suggestions and prospects are given.