Design of optical path for wide-angle gradient-index antireflection coatings
Resource
Applied Optics 46 (26): 6533-6538
Journal
Applied Optics
Journal Volume
46
Journal Issue
26
Pages
6533-6538
Date Issued
2007-09
Date
2007
Author(s)
Abstract
What we believe to be a new principle is introduced for the design and selection of gradient-index antireflection profiles that are effective over a wide range of incident angles as well as wavelengths at a given physical film thickness. It is shown that at oblique incidence the smoothness of the optical path of incident light inside a gradient-index film has a crucial effect on the overall reflection. Thus the smoothness of variations in refractive angle (rather than that of the index profile itself) needs to be maximized for wide-angle operation. As an example, the performance of Gaussian and Quintic profiles at large incident angles are considered in light of this point of view.
SDGs
Type
journal article
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