Imaging scatterometry of butterfly wing scales

• DOI: 10.1364/oe.17.000193
• Publication Date: 2008-12-24T16:44:31Z
• Authors: D. G. Stavenga; H. L. Leertouwer; P. Pirih; M. F. Wehling
• Keywords: Scatterometer; Iridescence; Forward scatter

We describe an imaging scatterometer allowing hemispherical reflectance measurements as a function of the angle incidence. The heart is ellipsoidal reflector, which compresses reflection into cone-shaped beam that can be imaged by normal optical system. instrument's performance illustrated scattering profiles blue-iridescent dorsal wing scales nymphalid Morpho aega and matte-green ventral lycaenid Callophrys rubi.