1 天津大学 精密测试技术及仪器国家重点实验室, 天津 300072
2 北京空间飞行器总体设计部, 北京 100086
考虑到离轴三反系统内部结构和光路的复杂性, 直接分析离轴三反系统内部各反射镜的偏转误差对视轴的影响难度较大。因此, 提出一种将离轴三反系统模型简化为单反射系统模型来进行分析的方法, 并在该模型的基础上建立离轴三反系统视轴偏转误差的计算公式。最后, 利用Zemax软件创建离轴三反系统模型, 通过变动反射镜位置来模拟系统视轴的变化, 并得到成像点的坐标, 再将得到的像点坐标代入计算公式求解出系统视轴的转动量。通过结果对比, 求解出视轴的转动量相对于仿真的最大误差不超过4%, 验证了基于单反射模型建立的理论分析方法的正确性。
离轴三反系统 视轴 误差 偏转 off-axis three-mirror system line-of-sight error deflection 红外与激光工程
2018, 47(9): 0918005
Author Affiliations
Abstract
Department of Precision Instrument, State Key Laboratory of Precision Measurement Technology and Instruments, Center for Photonics and Electronics, Tsinghua University, Beijing 100084, China
A high-power, high-energy Ho:YAG oscillator resonantly pumped by a Tm-doped fiber laser is presented. A maximum continuous output power of 38 W with a slope efficiency of 51.9% is achieved at the wavelength of 2.09 μm, and M2≈1.48. In the Q-switching regime, the maximum pulse energy of 12.8 mJ, corresponding to a 514.5 kW peak power, is obtained at the pulse repetition frequency of 1 kHz. Furthermore, the thermal lens effect of the system is studied theoretically, and the radius of the transverse electromagnetic (TEM00) mode of the laser crystal under different pump powers is given.
140.3540 Lasers, Q-switched 140.3580 Lasers, solid-state 140.5680 Rare earth and transition metal solid-state lasers Chinese Optics Letters
2015, 13(12): 121402
