Page 2, Basic Concepts and Definitions

Table of Contents

• Front Matter

• Fundamentals of Interferometry
• Two-Beam Interference Equation

• Basic Concepts and Definitions

• Conditions for Obtaining Fringes

• Visibility

• Spatial Coherence

• Polarization

• Beamsplitters

• Plate and Pellicle Beamsplitters

• Interferometers
• The Interferometer

• Classic Fizeau Interferograms

• Newton's Rings

• Twyman-Green Interferometer

• Compensating Plate

• PBS-based Twyman-Green Interferometer

• Laser-based Fizeau

• Mach-Zehnder Interferometer

• Beam Testing

• Lateral Shear Interferometry

• Rotating Grating LSI

• Radial Shear Interferometer

• Interferograms
• Interferograms

• Wavefront Aberration Coefficients

• Zernike Polynomials

• RMS Wavefront Error

• Spherical Aberration Interferograms

• Astigmatism Interferograms

• Interferograms–Other Aberrations

• Moiré

• Moiré and Interferograms

• Phase-Shifting Interferometry
• Direct Phase Measurement

• Methods for Phase Shifting

• Continuous Phase Shifting

• Liquid Crystal Retarder

• Phase Shifting Algorithms

• Basic Phase Unwrapping

• Phase-Stepping vs. Phase-Ramping

• Errors in PSI

• Quantization Errors

• Incorrect Phase Shift

• Avoiding Vibrations

• Spatial Synchronous and Fourier Methods

• Spatial Carrier Interferometry

• Ground Glass

• Surface Microstructure
• Surface Microstructure

• Nomarski Interference Microscope

• Fringes of Equal Chromatic Order (FECO)

• Phase-Shifting Interference Microscope

• Multiple-Wavelength Interferometer

• Vertical Scanning Techniques

• Flat Surface Testing
• Flat Surface Testing

• Windows

• Prisms

• Corner Cubes

• Curved Surface Testing
• Testing Curved Surfaces-Test Plate

• Curved Surfaces—Laser-based Fizeau

• Testing Lenses or Lens Systems

• Shack Cube Interferometer

• Scatterplate Interferometer

• Phase-Shifting Scatterplate Interferometer

• Long-Wavelength Interferometry

• Smartt Point Diffraction Interferometer

• Phase Shifting a PDI

• Sommargren Diffraction Interferometer

• Curved Surfaces, VSWLI

• Absolute Measurements
• Absolute Measurements: Flats

• Absolute Measurements: Spheres

• Asphere Testing
• Aspheric Surfaces

• Aspheric Testing

• Hyperboloid Null Tests

• Offner Null

• Holographic Null Optics

• CGH Basics

• CGH Design Guidelines

• Non-Null Tests

• Reverse Raytracing

• Sub-Nyquist Interferometry

• Long-Wavelength Interferometry

• Appendices
• Non-Interferometric Testing

• Foucault (Knife-Edge) Test

• Ronchi Test

• Equation Summary

• Back Matter