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Interferograms


Excerpt from Field Guide to Interferometric Optical Testing

Spherical Aberration Interferograms

The following figures are example interferograms with their corresponding wavefront aberration and Zernike coefficients in waves.

Spherical Abberations

W020=1
W040=0
Z3=1/2
Z8=0		W020=0
W040=1
Z3=1/2
Z8=1/6		W020=0
W040=4
Z3=2
Z8=2/3
W020=0
W040=0
Z3=0
Z8=0		W020=-1
W040=1
Z3=0
Z8=1/6		W020=-4
W040=4
Z3=0
Z8=2/3
W020=-1
W040=0
Z3=-1/2
Z8=0		W020=-2
W040=1
Z3=-1/2
Z8=1/6		W020=-8
W040=4
Z3=-2
Z8=2/3

W111=−4 and Z1=−4 for all of these interferograms.

 

Astigmatism Interferograms

Small Astigmatism Sagittal Focusθ=Tilt orientation

Wavefront Coefficients

W020=0
W111=4 at θ
W222=−1 at 90°

Zernike Coefficients

Z0=−1/4Z3=−1/4
Z1=4 cosθ   Z4=1/2
Z2=4sinθZ5=0

 

Large Astigmatism Sagittal Focus

Wavefront Coefficients

W020=0
W111=1 at θ
W222=−4 at 90°

Zernike Coefficients

Z0=−1Z3=−1
Z1= cosθ   Z4=2
Z2=sinθZ5=0

 

Large Astigmatism Medial Focus

Wavefront Coefficients

W020=2
W111=1 at θ
W222=−4 at 90°

Zernike Coefficients

Z0=0Z3=0
Z1= cosθ   Z4=2
Z2=sinθZ5=0
Citation:

E. P. Goodwin and J. C. Wyant, Field Guide to Interferometric Optical Testing, SPIE Press, Bellingham, WA (2006).



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