title: Isogyre formation by isotropic refracting bodies.
abstract: A 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.
authors.affiliation: Department of Physics, Victoria University of Wellington, New Zealand.
authors.forename: J
authors.initials: J
authors.lastname: Lekner
mesh_terms: D007909:Lenses; D008433:Mathematics; D055095:Optics and Photonics