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Measurement based on fringe reflection for testing aspheric optical axis precisely and flexibly.

Yan Tang1, Xianyu Su, Song Hu

  • 1State Key Laboratory of Optical Technologies for Microfabrication, Institute of Optics & Electronics, Chinese Academy of Sciences, Chengdu 610209, China. ty0513@163.com

Applied Optics
|November 17, 2011
PubMed
Summary

A novel fringe reflection method precisely measures aspheric mirror optical axes. This technique enables quantitative optical axis testing before surface height measurement, enhancing optical metrology.

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Area of Science:

  • Optical Engineering
  • Metrology
  • Surface Characterization

Background:

  • Accurate determination of the optical axis is crucial for aspheric optics.
  • Existing methods may lack precision or flexibility for complex aspheric surfaces.

Purpose of the Study:

  • To propose and validate a flexible and precise method for measuring the optical axis of aspheric mirrors.
  • To enable quantitative optical axis determination prior to absolute surface height measurement.

Main Methods:

  • A fringe reflection technique using a movable patterned screen and a camera.
  • The method involves observing reflected fringe patterns from the aspheric surface.
  • Quantitative analysis of fringe displacement to determine the optical axis.

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Main Results:

  • The proposed fringe reflection method allows for precise and flexible optical axis measurement.
  • The method was successfully combined with existing techniques for absolute height measurement.
  • Computer simulations and preliminary experiments confirmed the method's feasibility.

Conclusions:

  • The fringe reflection method offers a robust solution for aspheric mirror optical axis metrology.
  • This technique enhances the capability for precise surface characterization of aspheric optics.
  • The method provides a valuable tool for optical manufacturing and testing workflows.