Imaging scatterometry of butterfly wing scales.
We describe an imaging scatterometer allowing hemispherical reflectance measurements as a function of the angle of incidence. The heart of the scatterometer is an ellipsoidal reflector, which compresses the hemispherical reflection into a cone-shaped beam that can be imaged by a normal optical system. The instrument's performance is illustrated by measurements of the scattering profiles of the blue-iridescent dorsal wing scales of the nymphalid Morpho aega and the matte-green ventral wing scales of the lycaenid Callophrys rubi.
Stavenga
D G
DG
Department of Neurobiophysics, University of Groningen, Groningen, The Netherlands. D.G.Stavenga@rug.nl
Leertouwer
H L
HL
Pirih
P
P
Wehling
M F
MF
D000818:Animals; D002080:Butterflies / Q000033:anatomy & histology*; D007091:Image Processing, Computer-Assisted; D007909:Lenses; D008027:Light; D008029:Lighting; D055095:Optics and Photonics; D010858:Pigmentation / Q000502:physiology; D012542:Scattering, Radiation; D014921:Wings, Animal / Q000033:anatomy & histology / Q000502:physiology*