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Related Experiment Videos

Asphere testing with a Fizeau interferometer based on a combined computer-generated hologram.

Jean-Michel Asfour1, Alexander G Poleshchuk

  • 1Dioptic GmbH, Kriemhildstrasse 11, 69469 Weinheim, Germany. Asfour@dioptic.de

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
|February 16, 2006
PubMed
Summary

This study introduces a novel optical test method using Fizeau interferometers and diffractive optical elements for precise measurement of spherical and aspherical surfaces. The new technique perfectly fulfills the Fizeau principle by generating wavefronts on the final optical surface.

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Area of Science:

  • Optical Engineering
  • Metrology
  • Diffractive Optics

Background:

  • Fizeau interferometers with diffractive optical elements are standard for measuring optical surfaces.
  • Existing methods face limitations in perfectly fulfilling the Fizeau principle for complex surfaces.

Purpose of the Study:

  • To present a novel optical test method for Fizeau interferometry.
  • To achieve a perfect fulfillment of the Fizeau principle by integrating a diffractive optical element on the final optical surface.

Main Methods:

  • Development of a new Fizeau interferometer setup incorporating a diffractive optical element on the last optical surface.
  • Experimental validation using a reference f/0.68 spherical mirror.
  • Application of the method for testing aspherical surfaces.

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Main Results:

  • The new method successfully generates both reference and measuring wavefronts on the final diffractive optical element.
  • Experimental testing of a spherical mirror confirmed the method's efficacy.
  • The technique demonstrated applicability for aspherical surface testing.

Conclusions:

  • The presented optical test method offers a novel approach to Fizeau interferometry.
  • This technique allows for precise measurement of spherical and aspherical surfaces with improved adherence to the Fizeau principle.
  • Experimental results validate the method's advantages and broad applicability.