Abstract

SummaryA simple derivation is given of a formula for the intensity pattern produced by a diffusely illuminated lens‐like body held between a polarizer and an analyser. The formula generalizes the results of Charman and of Pierscionek and Chan for a dielectric sphere between crossed polaroids. A dark cross is universal for all lens‐like bodies whose axis of symmetry is normal to the polarizer and analyser. Intensity contours are plotted for ellipsoidal lenses.

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