Rigorous analytical formula for freeform singlet lens design free of spherical aberration
classification
⚛️ physics.optics
keywords
aberrationformulafreeformsphericalanalyticaldesignequationfree
read the original abstract
An analytical closed-form formula for the design of freeform lenses free of spherical aberration is presented. Given the equation of the freeform input surface, the formula gives the equation of the second surface in order to correct the spherical aberration. The derivation is based on the formal application of the variational Fermat principle under the standard geometrical optics approximation.
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