Yu Kai, Zhao Huijie
School of Instrumentation Science & Opto-Electronics Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing 100191, China.
Key Laboratory of "Precision Opto-Mechatronics Technology", Ministry of Education, No. 37 Xueyuan Road, Haidian District, Beijing 100191, China.
Materials (Basel). 2022 Jun 24;15(13):4464. doi: 10.3390/ma15134464.
Acousto-optical tunable filter (AOTF) does not conform to the pinhole model due to the acousto-optic interaction. A calculation method of AOTF aberrations under the condition of incident light with a large arbitrary angle is proposed to solve the problem of coordinate mapping between object space and image space of the AOTF system without refractive index approximation. This approach can provide accurate pointing information of the interested targets for the tracking and searching system based on AOTF. In addition, the effect of cut angle values of the paratellurite crystal on aberrations was analyzed to optimize the design of AOTF cutting according to different application requirements. Finally, distribution characteristics and quantitative calculation results of AOTF aberrations were verified by experiments with different targets, respectively. The experimental results are in good agreement with the simulations.
声光可调谐滤波器（AOTF）由于声光相互作用，不符合针孔模型。提出了一种在任意大入射角条件下AOTF像差的计算方法，以解决AOTF系统物空间与像空间之间的坐标映射问题，而无需折射率近似。该方法可为基于AOTF的跟踪搜索系统提供感兴趣目标的精确指向信息。此外，分析了偏碲酸盐晶体切割角值对像差的影响，以便根据不同应用需求优化AOTF切割设计。最后，分别通过不同目标的实验验证了AOTF像差的分布特性和定量计算结果。实验结果与模拟结果吻合良好。
