Vision-Based Alignment Control for Grating Tiling in Petawatt-Class Laser System

	Vision-Based Alignment Control for Grating Tiling in Petawatt-Class Laser System
	Fang, Zaojun1 ; Xia, Lan 2; Chen, Guodong 1; Huang, Yanlong 1; Xu, De3 ; Tan, Min1
发表期刊	IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
	2014-06-01
卷号	63 期号:6 页码:1628-1638
文章类型	Article
摘要	Large-sized diffraction gratings are required for the compressor of chirped-pulse-amplification systems. However, producing single large grating is of great difficulty, which makes grating tiling an alterative solution. This paper presents a vision-based alignment control method for grating tiling in petawatt-class laser system. Tiling errors with six degrees of freedom are grouped into three ones, and a decoupled vision control method is proposed. The piston error is measured from the far-field focal-spot image. To determine the piston error, the energy ratio between the main and secondary spots in the image is computed, and then a mapping formulation is determined to compute the piston from the energy ratio. To guarantee precision and reliability, a closed-loop piston control system with clustering error filtering and output verification is designed. The angular error is composed of two parts, i.e., tip and tilt errors, which is measured from the near-field interference fringe image. To reduce the influence of airflow on the angular measurement, a novel image quality estimation method is designed using the average crest-to-trough difference. Then, Fourier fringe pattern analysis is applied to the left and right parts of the image to reconstruct the wavefront, based on which a closed-loop grating angular control system is designed. Finally, experiments are well conducted in a tritiled gratings to verify the performance and precision of the proposed grating tiling system.
关键词	Focal-spot Image Fringe Image Grating Tiling Interference Visual Control Wavefront
WOS标题词	Science & Technology ; Technology
关键词[WOS]	PULSE AMPLIFICATION LASERS ; VISUAL SERVO CONTROL ; COHERENT ADDITION ; COMPRESSOR ; PATTERNS ; DESIGN
收录类别	SCI
语种	英语
WOS研究方向	Engineering ; Instruments & Instrumentation
WOS类目	Engineering, Electrical & Electronic ; Instruments & Instrumentation
WOS记录号	WOS:000336787700024
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ia.ac.cn/handle/173211/3477
专题	复杂系统认知与决策实验室_先进机器人
作者单位	1.Chinese Acad Sci, Inst Automat, State Key Lab Management & Control Complex Syst, Beijing 100190, Peoples R China 2.China Acad Engn Phys, Shanghai Inst Laser Plasma, Shanghai 201800, Peoples R China 3.Chinese Acad Sci, Inst Automat, Res Ctr Precis Sensing & Control, Beijing 100190, Peoples R China
第一作者单位	中国科学院自动化研究所
推荐引用方式 GB/T 7714	Fang, Zaojun,Xia, Lan,Chen, Guodong,et al. Vision-Based Alignment Control for Grating Tiling in Petawatt-Class Laser System[J]. IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT,2014,63(6):1628-1638.
APA	Fang, Zaojun,Xia, Lan,Chen, Guodong,Huang, Yanlong,Xu, De,&Tan, Min.(2014).Vision-Based Alignment Control for Grating Tiling in Petawatt-Class Laser System.IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT,63(6),1628-1638.
MLA	Fang, Zaojun,et al."Vision-Based Alignment Control for Grating Tiling in Petawatt-Class Laser System".IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 63.6(2014):1628-1638.