title: Polarization effects in interferograms of conical optical elements.
abstract: Analysis of a particular interferometer shows that severe polarization effects in interferograms of conical optical elements can be prevented. A simple formula is derived for correcting residual polarization effects due to spatially varying reflection coefficients. The formula can be used for estimating whether a correction is required. Several applications are discussed.
authors.forename: T R
authors.initials: TR
authors.lastname: Ferguson