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采用爬山法和模拟退火法相结合的混合优化算法,设计得到了二元光学器件的良好位相结构;基于高斯分布随机信号模型,分析了二元光学器件对输入波面位相畸变的宽容度。首次针对波长λ= 1.053μm 研制了 100m m 的连续位相二元光学器件,并通过多级衰减片及 C C D 实现了焦斑光强分布测量,结果表明得到了边缘陡峭、旁瓣小、中心主瓣具有一定均匀性、且没有中心零级锐脉冲的焦斑光强分布。
By using the hybrid optimization algorithm combined hill-climbing method and simulated annealing method, the good phase structure of binary optics was designed. Based on the Gaussian distribution random signal model, the tolerance of binary optics to phase distortion of input wavefront was analyzed. For the first time, a continuous-phase binary optical device of 100m m was developed for the wavelength λ = 1.053μm, and the intensity distribution of the focal spot was measured by multi-stage attenuator and C C D. The results show that the edge is steep and the sidelobe is small , The center of the main lobe has a certain uniformity, and there is no central zero level sharp pulse focal spot intensity distribution.