title: Phase retarders with variable angles of total internal reflection.
abstract: Results for three λ/4 phase retarders are reported. One of them is achromatic to within ± 0.06° of 90° in the visible region. It is shown that, under certain conditions, oblique incidence on the entrance face of total internal reflection phase retarders can greatly improve the achromaticity.
authors.forename: N N
authors.initials: NN
authors.lastname: Nagib
authors.forename: M S
authors.initials: MS
authors.lastname: E-Bahrawy