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Spherical Aberration


Excerpt from Field Guide to Geometrical Optics

Spherical aberration causes the power or focal length of the system to vary with pupil radius.

equation_1Sperrical_aberration



















The transverse aberration TA is the transverse ray error from the top of the pupil.


transverse_aberration


longitudinal_aberration

The longitudinal aberration LA is the distance from paraxial focus to marginal focus (where the real marginal ray crosses the axis). The longitudinal ray errors εZ for SA are quadratic with yP. The real marginal ray angle is U'.

equation_3



Citation:

J. E. Greivenkamp, Field Guide to Geometrical Optics, SPIE Press, Bellingham, WA (2004).



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