Abstract

The nonorthogonal shaft laser theodolite (N-theodolite) measurement system is a new kind of instrument that can be applied to large-scale metrology. Different from traditional theodolites, the three axes of the N-theodolite have no requirements on the orthogonality and intersection. For the measurement in laser scale, the parameters of the system on a large scale must be known. A calibration method of the laser beam based on specular reflection and its compensation are proposed, which are at a range of 12 m. Through the experiments, the results show that the straightness accuracy of the laser beam of the left N-theodolite is 0.12 mm at a range of 12 m, and the right one is 0.14 mm. Through the measurement experiments, the maximum measurement deviation of the system is 0.27 mm, which is verified to be a feasible method to calibrate the laser beam in large-scale space.

© 2020 Optical Society of America

Dynamic calibration method of the laser beam for a non-orthogonal shaft laser theodolite measurement system

Fengjin Miao, Bin Wu, Congcong Peng, Gaoju Ma, and Ting Xue
Appl. Opt. 58(33) 9020-9026 (2019)

Two-step calibration method of the extrinsic parameters with high accuracy for a bistatic non-orthogonal shafting laser theodolite system

Zefeng Sun, Jiehu Kang, Zhen Zhang, Luyuan Feng, and And Bin Wu
Opt. Express 31(2) 2120-2134 (2023)

Calibration method of a laser beam based on discrete point interpolation for 3D precision measurement

Jiehu Kang, Bin Wu, Zefeng Sun, and Jiang Wang
Opt. Express 28(19) 27588-27599 (2020)

Vision measuring method for the involute profile of a gear shaft

Jianwei Miao, Qingchang Tan, Siyuan Liu, Haojing Bao, and Xianbao Li
Appl. Opt. 59(13) 4183-4190 (2020)

Laser-based precision alignment for multiple span rotary shafts

Yuansong Zheng, Zhifeng Lou, Xiaodong Wang, and Zhenjiang Yu
Appl. Opt. 60(12) 3358-3364 (2021)