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High precision computer-generated moiré profilometry.

Chengmeng Li1, Yiping Cao2, Lu Wang1

  • 1Department of Opto-Electronics, Sichuan University, Chengdu, 610064, China.

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Summary
This summary is machine-generated.

A new computer-generated moiré profilometry method accurately eliminates background light, enhancing precision for 3D shape measurement. This improved technique ensures reliable results even with complex object geometries.

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Area of Science:

  • Optics and Photonics
  • Metrology
  • Computer Vision

Background:

  • Computer-generated moiré profilometry offers higher accuracy by avoiding transient influences.
  • Existing methods can be compromised by aliasing and impure background light extraction.
  • Accurate background light elimination is crucial for precise moiré profilometry.

Purpose of the Study:

  • To propose a high-precision computer-generated moiré profilometry method.
  • To address accuracy limitations caused by background light interference in existing techniques.
  • To enhance measurement precision through accurate elimination of background light components.

Main Methods:

  • Introduced an additional phase-shifting sinusoidal grating for accurate information extraction.
  • Utilized spatial domain analysis to improve pattern sinusoidal features.
  • Developed a technique for accurate background light component elimination.

Main Results:

  • Significantly improved measurement precision compared to previous methods.
  • Successfully maintained real-time measurement capabilities.
  • Experimental validation confirmed the method's feasibility and effectiveness.

Conclusions:

  • The proposed method effectively eliminates background light for enhanced moiré profilometry precision.
  • This technique offers a robust solution for 3D shape measurement, even with aliased spatial spectra.
  • The method provides a reliable and accurate approach for scientific and industrial applications.