title: Phase measurement and compensation of a wave front using a twisted nematic liquid-crystal television.
abstract: A twisted nematic liquid-crystal television (LCTV) has been used together with Twyman?"Green type interferometers to measure and compensate the phase distortion of a wave front. The twisted nematic LCTV has been operated as a phase-only modulator, and its phase retardation ability has been doubled in these experiments. The phase function of a phase object has been measured in different arrangements of the experimental setup.
authors.forename: R
authors.initials: R
authors.lastname: Dou
authors.forename: M K
authors.initials: MK
authors.lastname: Giles