title: Improvement of the degree of spatial coherence in a Michelson interferometer.
abstract: The visibility of fringes of equal thickness of an approximately plane parallel plate illuminated by a quasi-monochromatic primary source is expressed in terms of the degree of longitudinal spatial coherence, i.e., the coherence of two points lying on a normal to the source. Use of polarization interferometers to increase the degree of coherence is discussed. This permits the use of a large source in a Michelson interferometer even when its two armlengths differ significantly.
authors.affiliation: Institut d'Optique de Paris, Boulevard Pasteur, Paris, France.
authors.forename: M
authors.initials: M
authors.lastname: Françon
authors.forename: S
authors.initials: S
authors.lastname: Mallick