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Updated: Jun 17, 2026

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A novel phase measuring deflectometry for aspheric mirror test.

Yan Tang1, Xianyu Su, Fan Wu

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

Optics Express
|December 10, 2009
PubMed
Summary
This summary is machine-generated.

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This study presents a novel fringe reflection method for precise aspheric mirror measurement. It offers greater accuracy and flexibility for high-deviation surfaces, overcoming limitations of traditional techniques.

Area of Science:

  • Optical Engineering
  • Metrology

Background:

  • Accurate measurement of aspheric mirrors is crucial for advanced optical systems.
  • Traditional methods like Phase Measuring Deflectometry (PMD) face challenges with high-deviation surfaces and calibration complexities.

Purpose of the Study:

  • To develop a more precise and flexible method for measuring aspheric mirrors, especially those with high deviations.
  • To overcome the limitations of existing techniques, including calibration errors and occlusion problems.

Main Methods:

  • A fringe reflection technique utilizing a dummy paraboloid to measure absolute height.
  • Positioning the camera beside the optical axis to avoid occlusion and enhance flexibility.
  • Eliminating the need for image projection vector calibration required by traditional PMD.

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Last Updated: Jun 17, 2026

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Published on: October 11, 2016

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Main Results:

  • The proposed method achieves higher precision in measuring aspheric mirrors with high deviations.
  • The technique demonstrates reduced sensitivity to calibration errors compared to traditional methods.
  • Computer simulations and preliminary experiments confirm the method's feasibility.

Conclusions:

  • The fringe reflection method with a dummy paraboloid offers a robust solution for precise aspheric mirror metrology.
  • This approach enhances measurement flexibility and accuracy, particularly for challenging high-deviation optics.
  • The method provides a viable alternative to traditional techniques, even with less precise calibration.