title: Interferometric measurements of the thickness of nematic liquid crystal films with a free surface.
abstract: We demonstrate two interferometric methods for measuring the thickness of nematic liquid crystal films with a free surface. The accuracy of either method is better than +/-1 %.
authors.forename: S M
authors.initials: SM
authors.lastname: Chen
authors.forename: R P
authors.initials: RP
authors.lastname: Pan
authors.forename: C L
authors.initials: CL
authors.lastname: Pan