The design of antireflection coatings at any light incidence is a challenging task in optics. To this aim, a minimax method is presented: it minimizes the maximum deviation of the spectral reflectance from the desired specifications over the wavelength for a given set of incidence angles. Refining is limited to lossless coatings with assigned refractive indices and undetermined thicknesses; the algorithm consists of iterating appropriate linear optimization steps. In the examples some minimax-refined coatings are compared with coatings reported in the literature.
© 1994 Optical Society of America
Original Manuscript: March 29, 1993
Revised Manuscript: August 30, 1993
Published: April 1, 1994
Amedeo Premoli and Maria Luisa Rastello, "Minimax refining of wideband antireflection coatings for wide angular incidence," Appl. Opt. 33, 2018-2024 (1994)