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Interferograms


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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