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根据偏心透镜组的结构原理,利用液晶空间光调制器(LC-SLM)对其结构进行了优化。对LC-SLM等效透镜功能的原理进行了分析,模拟仿真了利用LC-SLM对光束进行调制的结果。实验验证了LC-SLM通过加载菲涅尔透镜相位图,实现了对光束会聚功能,并且通过耦合位移相位因子可以实现会聚光斑平移的功能,能够代替在偏心透镜组中实现同一功能的透镜。配合后续的透镜组,理论上可以控制光束实现大角度的扫描。
According to the principle of the structure of the eccentric lens group, the structure of the lens is optimized by using the liquid crystal spatial light modulator (LC-SLM). The principle of the LC-SLM equivalent lens function is analyzed, and the result of modulating the light beam by LC-SLM is simulated. The experiment verifies that the LC-SLM achieves the function of beam convergence by loading the Fresnel lens phase diagram, and can realize the function of converging spot translation by coupling the displacement phase factor, which can replace the lens with the same function in an eccentric lens group. With follow-up lens group, in theory, you can control the beam to achieve large-angle scanning.