1. Figure 5. Epi-illumination light microcopy and imaging scatterometry of silvery wing scales. A, a scale of the ventral wing observed with an epi-illumination light microscope. Scale bar: 20 μm. B, scatterogram resulting from a narrow aperture axial light beam illuminating a small part of a single scale. A diffraction pattern emerges perpendicular to the ridges, which are slightly oriented obliquely. C, off-axis illumination on several scales yields a more diffuse scatter pattern. D, illumination by a hemispherical light source results in a diffuse scatter pattern.
From: Shiny wing scales cause spec(tac)ular camouflage of the angled sunbeam butterfly, Curetis acuta
Biol J Linn Soc. 2013;109(2): doi: /bij.12070
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