Optical three-dimensional measurements by radially symmetric structured light projection.

Area of Science:

• Optics and Photonics
• Robotics and Automation
• Metrology and Measurement

Background:

• Traditional inspection methods for holes and tubes often lack accuracy in wide-angle scenarios.
• Existing triangulation systems can be complex and computationally intensive.

Purpose of the Study:

• To develop an advanced structured light projection technique for inspecting internal geometries like holes and tubes.
• To enhance measurement accuracy, particularly in wide-angle fields of view.

Main Methods:

• Implementation of a structured light projection system with a triangulation base parallel to the line of sight.
• Development of a prototype for sewer pipe inspection robot optics (KARO).

Main Results:

• Achieved high accuracy in the wide-angle region.
• Demonstrated minimal system diameter and symmetry of measurements.
• Enabled simplified coordinate calculations for inspected features.

Conclusions:

• The developed technique provides a robust and accurate solution for inspecting internal structures.
• Potential applications include medical endoscopes and technical inspection systems requiring wide-angle capabilities.