1 西安空间无线电技术研究所,陕西 西安 710000
2 西安工业大学 光电工程学院 陕西省薄膜技术与光学检测重点实验室,陕西 西安 710021
凸非球面反射镜在反射式光学系统中的应用非常广泛,但其面形高精度检测一直是光学制造领域的难题。为了实现小口径、深度凸非球面的面形高精度检测,提出了一种基于计算全息图(Computer Generated Hologram,CGH)的零位干涉检测技术。首先,详细阐述了该技术的检测原理和方法,给出了计算全息中补偿测试全息和对准标记全息设计过程中的技术要点;然后结合工程应用,针对口径15 mm、顶点曲率半径11.721 mm、非球面度达到72 μm的深度凸非球面,设计并制造了相应的CGH补偿元件,完成了相应零位干涉检测系统的搭建和检测实验;最后,与Luphoscan的检测结果交叉对比,验证了该检测方法的准确性。该技术为小口径凸非球面的高精度检测提供了一种有效的方法,具有显著的工程应用价值。
面形检测 凸非球面 计算全息图 干涉 shape measurement convex aspheric computer generated hologram (CGH) interference 红外与激光工程
2022, 51(9): 20220190
红外与激光工程
2020, 49(12): 20201074
强激光与粒子束
2020, 32(11): 112009
Author Affiliations
Abstract
1 Shanghai Institute of Laser Plasma, China Academy of Engineering Physics, Shanghai 201899, China
2 State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
3 School of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
The use of low-coherence light is expected to be one of the effective ways to suppress or even eliminate the laser–plasma instabilities that arise in attempts to achieve inertial confinement fusion. In this paper, a review of low-coherence high-power laser drivers and related key techniques is first presented. Work at typical low-coherence laser facilities, including Gekko XII, PHEBUS, Pharos III, and Kanal-2 is described. The many key techniques that are used in the research and development of low-coherence laser drivers are described and analyzed, including low-coherence source generation, amplification, harmonic conversion, and beam smoothing of low-coherence light. Then, recent progress achieved by our group in research on a broadband low-coherence laser driver is presented. During the development of our low-coherence high-power laser facility, we have proposed and implemented many key techniques for working with low-coherence light, including source generation, efficient amplification and propagation, harmonic conversion, beam smoothing, and precise beam control. Based on a series of technological breakthroughs, a kilojoule low-coherence laser driver named Kunwu with a coherence time of only 300 fs has been built, and the first round of physical experiments has been completed. This high-power laser facility provides not only a demonstration and verification platform for key techniques and system integration of a low-coherence laser driver, but also a new type of experimental platform for research into, for example, high-energy-density physics and, in particular, laser–plasma interactions.
Matter and Radiation at Extremes
2020, 5(6): 065201
强激光与粒子束
2020, 32(1): 011004