Y. L. Gagnon, B. Söderberg, and R. H. Kröger
Effects of the peripheral layers on the optical properties of spherical fish lenses
Journal of the Optical Society of America A 25, 2468-2475 (2008)
Abstract: We created a computational
optical model of spherical fish lenses that
takes into account the effects of the peripheral layers that differ in
cellular composition from the bulk of the lens. A constant refractive
index, except for the lens capsule, in the outer about 6 % of lens
radius made it possible to uniquely infer the refractive index
gradient in more central layers from a known or desired longitudinal
spherical aberration curve using the inverse Abel transform. Since the
zone of constant refractive index is wider than necessary to make the
solution unique and for optimal optical performance of the lens, we
propose that its width is set by the metabolic needs of the lens.
LU TP 08-02