Abstract

In this paper, we propose a new measurement and compensation method for the eccentricity of the inertial confinement fusion (ICF) capsule, which combines computer vision and the laser differential confocal method to align the capsule in rotation measurement. This technique measures the eccentricity of the capsule by obtaining the sub-pixel profile with a moment-based algorithm, then performs the preliminary alignment by the two-dimensional adjustment. Next, we use the laser differential confocal sensor to measure the height data of the equatorial surface of the capsule by turning it around, then obtain and compensate the remaining eccentricity ultimately. This method is a non-contact, automatic, rapid, high-precision measurement and compensation technique of eccentricity for the capsule. Theoretical analyses and preliminary experiments indicate that the maximum measurement range of eccentricity of this proposed method is 1.8 mm for the capsule with a diameter of 1 mm, and it could eliminate the eccentricity to less than 0.5 μm in 30 s.

© 2018 Optical Society of America

Laser differential confocal inner-surface profile measurement method for an ICF capsule

Longxiao Wang, Lirong Qiu, Weiqian Zhao, Xianxian Ma, Shaobai Li, Dangzhong Gao, Jie Meng, and Qi Wang
Opt. Express 25(23) 28510-28523 (2017)

High-efficiency full-surface defects detection for an ICF capsule based on a null interferometric microscope

Cong Wei, Jianxin Li, Jun Ma, Mingliang Duan, Yi Zong, Xinyu Miao, Rihong Zhu, Caojin Yuan, Dangzhong Gao, and Zongwei Wang
Appl. Opt. 60(4) A62-A72 (2021)

Interferometric microscope with a confocal focusing for inner surface defect detection of ICF capsule

Shuai Yang, Zihao Liu, Xianxian Ma, Qi Wang, Zongwei Wang, Yun Wang, Lirong Qiu, and Weiqian Zhao
Opt. Express 29(23) 38924-38938 (2021)

High-precision laser differential confocal measurement method for multi-geometric parameters of inner and outer spherical surfaces of laser fusion capsules

Xianxian Ma, Lirong Qiu, Yun Wang, Mengshuang Lu, and Weiqian Zhao
Opt. Express 28(7) 9913-9928 (2020)

Surface defect measurement of ICF capsules under a limited depth of field

Renhui Guo, Zhiyao Yin, Hang Fu, Cong Wei, Xin Yang, Jianxin Li, and Jun Ma
Opt. Express 29(19) 30783-30798 (2021)