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A three-dimensional small angle measurement system based on autocollimation method.

Wenran Ren¹, Jiwen Cui¹, Jiubin Tan¹

¹Center of Ultra-Precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin 150080, China.

The Review of Scientific Instruments

|June 1, 2022

Summary

This summary is machine-generated.

A novel laser autocollimator uses a transmission grating and reflector to measure 3D angles precisely. This precision angle measurement system achieves resolutions better than 0.01 arcseconds.

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Area of Science:

Optics and Photonics
Metrology and Measurement Science

Background:

Traditional angle measurement systems often face limitations in simultaneously capturing three-dimensional (3D) angular data.
High-precision metrology is crucial for advanced manufacturing, aerospace, and scientific research.

Purpose of the Study:

To propose and validate a novel laser autocollimator capable of simultaneous 3D angle measurement.
To establish a mathematical model for the optical configuration and measurement principle.

Main Methods:

Design of an optical configuration utilizing a transmission grating and a combined reflector.
Development of a mathematical model to relate beam deviations to 3D angles.
Experimental construction and testing of the proposed laser autocollimator system.

Main Results:

Simultaneous measurement of yaw, pitch, and roll angles was achieved.
The system demonstrated a measurement resolution better than 0.01 arcseconds.
Excellent measurement repeatability was observed: yaw (0.013"), pitch (0.012"), and roll (0.009").

Conclusions:

The proposed laser autocollimator effectively performs simultaneous 3D angle measurements with high precision.
The developed system offers a viable solution for precision angle metrology applications.