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An absolute test for axicon surfaces.

Jun Ma1, Christof Pruss, Rihong Zhu

  • 1Institut für Technische Optik, Universität Stuttgart, Pfaffenwaldring 9, Stuttgart, 70569, Germany. optmj@yahoo.cn

Optics Letters
|June 3, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces an absolute testing method for axicon surfaces using symmetry. The technique removes errors from the testing setup, enabling precise measurement of surface deviations.

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Area of Science:

  • Optical metrology
  • Surface testing
  • Axicon optics

Background:

  • Accurate characterization of optical surfaces is crucial for high-performance optical systems.
  • Existing methods for axicon testing often struggle with absolute accuracy and error removal.

Purpose of the Study:

  • To develop and validate a novel method for the absolute testing of axicon surfaces.
  • To eliminate systematic errors originating from the interferometer and null optics.
  • To enable precise determination of local surface deviations on axicons.

Main Methods:

  • Exploiting axicon symmetry to perform shifted measurements within a null test setup.
  • Acquiring four measurements with two distinct shifts of the axicon surface.
  • Employing a double-side spiral-path direct integration for wavefront reconstruction.
  • Simulating error propagation including systematic and statistical errors.

Main Results:

  • Demonstrated removal of interferometer and null optics errors through the proposed method.
  • Achieved absolute surface local deviation measurement via wavefront reconstruction.
  • Validated the method through simulations and experimental testing of a 90° axicon.

Conclusions:

  • The presented method provides a robust approach for the absolute testing of axicon surfaces.
  • This technique enhances the accuracy of optical surface metrology.
  • The findings are critical for the fabrication and quality control of axicon-based optical systems.