Short Course on DVD: Introduction to Interferometric Optical Testing

DVDs Available

Individual Use
$600 USD
Site License
$3,000 USD
DVD (2 discs)
3 hours, 53 minutes
James C. Wyant

This short course introduces the field of interferometric optical testing. Topics include basic interferometers for optical testing; concepts of phase-shifting interferometry; testing of flats, spheres, windows, prisms and corner cubes; long-wavelength interferometry; testing of aspheric surfaces; measurement of surface microstructure; and absolute measurements of flats, spheres and surface roughness.

Intended Audience: 

Engineers, scientists and managers who need to understand modern interferometric optical testing techniques and the advantages and disadvantages of the various optical tests.

Learning Objectives: 

This course will enable participants to:

  • Explain the basic concepts of interferometric optical testing.
  • Appreciate the power, capabilities and limitations of phase-shifting interferometry.
  • Know how to do interferometric optical testing in the presence of vibration and turbulence.
  • Understand techniques for testing mirrors, lenses, windows prisms, and corner cubes.
  • Appreciate interferometric measurements of index inhomogeneity.
  • Compare and understand different aspheric testing techniques.
  • Understand capabilities and techniques for measuring surface microstructure.
  • Understand methods for performing absolute measurements of flat surfaces, spherical surfaces and surface roughness.
  • Describe the current state of the art of direct phase measurement interferometers.
Course Outline: 

Introductory Remarks

Basic Interferometers for Optical Testing

  • Two-beam interference
  • Fizeau and Twyman-Green interferometers
  • Basic techniques for testing flat and spherical surfaces
  • Mach-Zehnder, Scatterplate and Smartt interferometers
  • Shearing interferometers
  • Typical interferograms

Phase-Shifting Interferometry

  • Elementary analysis of interferograms
  • Basic algorithms
  • Removing phase ambiguities
  • Single shot phase-shifting (reducing effects of vibration)

Specialized Optical Tests

  • Testing windows, prisms and corner cubes
  • Measuring radius of curvature
  • Measuring index inhomogeneity
  • Testing cylindrical surfaces

Long-Wavelength Interferometry

  • Wavelengths of primary interest
  • Testing infrared-transmitting optics
  • Testing optically rough surfaces

Testing of Aspherical Surfaces

  • Description of aspheric surfaces
  • Techniques for testing aspheric surfaces
  • Requirements for use of optical analysis software in optical testing
  • Limitations of current aspheric testing techniques

Measurement of Surface Microstructure

  • Noncontact optical profilers
  • White-light interferometry
  • Vertical scanning optical profilers

Absolute Measurements

  • Flat surfaces
  • Spherical surfaces
  • Surface roughness

Concluding Remarks

  • Limitations of direct phase measurement interferometers
  • Most important to remember
  • References

Cindy Robertson

Legal Notice

This work of authorship identified as "INSERT NAME OF THIS COURSE", (the Work) is Copyright 2007 by the Arizona Board of Regents (ABOR). This Notice must remain attached to the Work. The Work and any modified versions of the Work explicitly permitted below must be attributed to The University of Arizona. Unless explicitly permitted below, it is unlawful to reproduce, modify, distribute, perform (or execute), or display (or generate images through use of) the Work in its original or any modified form. THIS WORK IS PROVIDED "AS IS," AND ABOR MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, ABOR MAKES NO REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE WORK WILL NOT INFRINGE ANY THIRD PARTY PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS. ABOR DOES NOT AGREE TO BEAR ANY LIABILITY FOR ANY USE OF THIS WORK. The names and trademarks of ABOR and The University of Arizona may not be used in advertising or publicity pertaining to the Work without written prior permission. Nothing in this Notice confers any title to the Work. Within the limitations specified in this Notice, the following rights are granted to the recipients specified below: a right to perform the Work which, in the case of computer software, means a right to execute the software instructions contained in the Work; and a right to display the Work which, in the case of computer software, includes a right to display images or screens generated by the Work. Within the limitations specified in this Notice, the rights specified above are granted to any individual or organization that acquired the Work directly from The University of Arizona or its agent. Rights specified above are granted solely for the purposes of research and education, and do not permit incorporation of the Work, or any part of the Work, in a product or service offered for sale. This Notice applies to this Work only.  If this license was purchased as a SITE LICENSE, the license gives the above permissions to only those individuals employed by the Licensee at a single physical site of the Licensee, such as a single building, or a single set of substantially contiguous buildings, and who access the Work while at that site.