Moiré patterns are extremely useful to help understand basic interferometry and interferometric test results. Chapter 16 in the second edition of the book Optical Shop Testing describes the relationship between moiré patterns and interferometry. The pdf files given below can be downloaded and printed to illustrate the examples in Chapter 16.
If there are other patterns you would like to see on this website, please let me know.
Tilt and Defocus
Tilt and Aberration
- 55 Waves Tilt, 6 Waves Spherical, -3 Waves Defocus
- 50 Waves Tilt, 5 Waves Coma
- 50 Waves Tilt, 3.5 Waves Astigmatism
- 50 Waves Tilt, 7 Waves Astigmatism, -3.5 Waves Defocus
Patterns illustrating two-wavelength interferometry