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The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

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Published on: August 12, 2013

A High-Precision Multi-Beam Optical Measurement Method for Cylindrical Surface Profile.

Yinghong Zhou¹, Zhiliang Wu¹, Nian Cai¹

¹School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China.

|August 26, 2023

Summary

This summary is machine-generated.

A new multi-beam optical method precisely measures cylindrical workpiece surface profiles. This optical sensing technique achieves high accuracy in determining curvature radius, outperforming existing methods.

Keywords:

cylindrical surface profile machine vision multi-beam optical measurement surface normal vector

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Area of Science:

Metrology
Optical Engineering
Surface Metrology

Background:

Accurate measurement of cylindrical workpiece surface profiles is crucial for quality control.
Existing methods may lack precision or efficiency for complex surface characterization.

Purpose of the Study:

To develop a high-precision, automated optical method for measuring the surface profile of cylindrical workpieces.
To enable accurate determination of the curvature radius of cylindrical surfaces.

Main Methods:

Acquisition of successive images of the workpiece surface using a multi-beam angle sensor under varying light directions.
Estimation of light directions and calculation of surface normal vectors from image feature regions.
Reconstruction of a depth map based on surface normal vectors to determine the curvature surface.

Main Results:

The proposed method successfully reconstructs the curvature surface profile of cylindrical workpieces.
Achieved a mean error of 0.89% for the curvature radius measurement.
Demonstrated a reasonable measurement speed of 10.226 seconds.

Conclusions:

The multi-beam optical method offers a precise and efficient solution for automated surface profile measurement of cylindrical workpieces.
The technique provides superior measurement accuracy compared to existing methods.
This approach facilitates accurate curvature radius determination for industrial applications.