title: Holographic interferometry with multiple wavelengths.
abstract: One of the unsolved problems in the well-established field of holographic interferometry is identification of zeroth-order fringes in cases in which the locations of zero displacement are unknown. We offer a simple solution: By making the double-exposure hologram of a white object in full color by using three or more wavelengths, the zeroth-order fringes will be indentified by their white color.
authors.forename: T H
authors.initials: TH
authors.lastname: Jeong
authors.forename: H I
authors.initials: HI
authors.lastname: Bjelkhagen
authors.forename: L M
authors.initials: LM
authors.lastname: Spoto