title: Analysis of micro-Fresnel lenses with local grating theory and its comparison with fully electromagnetic methods.
abstract: We report on a numerical analysis method for diffractive optical elements that consist of features ranging from subwavelength to more than 10lambda. The essence of the method is treating local structures of the optical elements as diffraction gratings. It is shown that the method can provide accuracy of results comparable with fully electromagnetic treatments in much shorter time. The theory and results are explained assuming micro-Fresnel lenses with one-dimensional structures for investigating polarization properties.
authors.affiliation: Faculty of Engineering, Ehime University, Matsuyama 790-8577, Japan. hichikaw@dpc.ehime-u.ac.jp
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Ichikawa
authors.forename: Koji
authors.initials: K
authors.lastname: Masuda
authors.forename: Takeshi
authors.initials: T
authors.lastname: Ueda