基于液晶空间光调制器的光束偏转控制技术

Beam Deflection Control Technology Based on Liquid Crystal Spatial Light Modulator

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 non-mechanical beam intelligent control based on liquid crystal spatial light modulator, a test system is built with silicon-based liquid crystal spatial light modulator whose pixel number is 1920 ~ 1080. The system can obtain the single beam with large angle, high diffraction efficiency, continuous steering in space, divide the incident light beam into 2, 3, 4, 5 beams and control deflection angle of each beam separately. Phase modulation principl＇e and＇ theoretical model of the spatial light modulator are introduced. The beam deflection control function and the h：eam spiittifig function are verified. The light path and the principle of the test system are analyzed. Finally, we..sum up the test results and put forward the suggestion and prospect.