title: Using shadows to measure spatial coherence.
abstract: We present a very simple method for measuring the spatial coherence of quasi-monochromatic fields through the comparison of two measurements of the radiant intensity with and without a small obscuration at the test plane. From these measurements one can measure simultaneously the field's coherence at all pairs of points whose centroid is the centroid of the obstacle. This method can be implemented without the need of any refractive or diffractive focusing elements.
authors.forename: James K
authors.initials: JK
authors.lastname: Wood
authors.forename: Katelynn A
authors.initials: KA
authors.lastname: Sharma
authors.forename: Seongkeun
authors.initials: S
authors.lastname: Cho
authors.forename: Thomas G
authors.initials: TG
authors.lastname: Brown
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Alonso