W. Singer et al., GRADIENT-INDEX MICROLENSES - NUMERICAL INVESTIGATION OF DIFFERENT SPHERICAL INDEX PROFILES WITH THE WAVE-PROPAGATION METHOD, Applied optics, 34(13), 1995, pp. 2165-2171
Ion-exchange microlenses are available with different gradient-index p
rofiles. We investigate the dependence of the imaging properties on th
e steepness of the index profiles. Therefore we model the index distri
bution by the Fermi function as radial distribution with spherical sym
metry. The results are compared to index profiles according to the Dor
emus model.