Abstract

Rotation Risley prisms are increasingly used for laser tracking due to high precision and good dynamic performance. In this paper, a novel laser coarse-fine coupling tracking method based on two pairs of rotation Risley prisms is proposed to perform the forward and inverse tracking function. The second pair of rotation Risley prisms with narrower wedge angle can achieve higher precision tracking with narrower field of view than the first one, enriching the coarse-fine coupling tracking trajectory patterns. Moreover, an inverse algorithm based on the two-step method and Newton’s iterative method is applied to solve the inverse issue for laser coarse-fine coupling tracking. Two cases further demonstrate that the motion switching strategy executed with the inverse solutions can steer the beam to track the desired motion trajectory. An experiment validates the availability of the cascaded rotation Risley-prism pairs to perform the laser coarse-fine coupling tracking function.

© 2018 Optical Society of America

Inverse solutions for a Risley prism scanner with iterative refinement by a forward solution

Anhu Li, Xinjian Gao, Wansong Sun, Wanli Yi, Yongming Bian, Hongzhan Liu, and Liren Liu
Appl. Opt. 54(33) 9981-9989 (2015)

Laser coarse–fine coupling scanning method by steering double prisms

Anhu Li, Xuchun Jiang, Jianfeng Sun, Lijuan Wang, Zhizhong Li, and Liren Liu
Appl. Opt. 51(3) 356-364 (2012)

Fast and high-precision tracking technology for image-based closed-loop cascaded control system with a Risley prism and fast steering mirror

Huayang Xia, Yunxia Xia, Liangzhu Yuan, Piao Wen, Wenxue Zhang, Ke Ding, Yue Fan, Haotong Ma, and Jinying Li
Opt. Express 32(6) 8555-8571 (2024)

Risley-prism-based tracking model for fast locating a target using imaging feedback

Anhu Li, Zusheng Zhao, Xingsheng Liu, and Zhaojun Deng
Opt. Express 28(4) 5378-5392 (2020)

Investigation of beam steering performances in rotation Risley-prism scanner

Anhu Li, Wansong Sun, Wanli Yi, and Qiyou Zuo
Opt. Express 24(12) 12840-12850 (2016)