Short Course on DVD: Introduction to Interferometric Optical Testing

DVDs Available

Individual Use
SC701-07-U
$600 USD
Site License
SC701-07-L
$3,000 USD
Media: 
DVD (2 discs)
Number: 
SC701-07
Time: 
3 hours, 53 minutes
Instructor: 
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
Contact: 

Cindy Robertson
626-4719
cindyr@optics.arizona.edu

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