红外与激光工程, 2018, 47 (11): 1142002, 网络出版: 2019-01-10  

基于小口径反射镜的大口径拼接光栅压缩器设计

Compressor design for large-aperture tiled-grating based on a small-size mirror
作者单位
1 重庆大学 机械工程学院, 重庆 400030
2 中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
摘要
为实现大口径拼接光栅拼接误差的高频高精度补偿的工程应用, 提出了一种基于小口径反射镜补偿大口径拼接光栅压缩器拼接误差的方法。基于双程Z型压缩器, 分析了小口径反射镜补偿量与拼接误差的关系, 采用光线追迹法和夫琅禾费远场衍射原理定量计算了各拼接误差补偿后对远场能量分布的影响, 证明了该方法原理的正确性, 并得到了直接驱动光栅与反射镜补偿时的各误差容限, 结果表明该方法能极大降低拼接光栅的精度要求。
Abstract
To realize the engineering application of the high frequency and high precision tiling error compensation, a novel method for error compensation of large-aperture tiled-grating compressor was presented by using a small-aperture mirror. The relationship between the amount of mirror compensation and the tiling error was analyzed for two-pass Z-type compressor. The influence of the compensated tiling error on the focus energy was quantitatively compared with the numerical simulations, which was combined with the ray-tracing method and principle of Fraunhofer far field diffraction. The validity was verified and the error tolerances for direct drive and mirror compensation were obtained. The results show that this method can decrease the precision demand significantly for tiled-grating.

张森, 张军伟, 周忆, 王逍, 母杰, 粟敬钦, 胡东霞. 基于小口径反射镜的大口径拼接光栅压缩器设计[J]. 红外与激光工程, 2018, 47(11): 1142002. Zhang Sen, Zhang Junwei, Zhou Yi, Wang Xiao, Mu Jie, Su Jingqin, Hu Dongxia. Compressor design for large-aperture tiled-grating based on a small-size mirror[J]. Infrared and Laser Engineering, 2018, 47(11): 1142002.

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