title: Multicolor digital holography with an achromatic phase shifter.
abstract: Multiwavelength recording and reconstruction of a three-dimensional object are realized by use of phase-shifting digital holography. Red, green, and blue lines emitted from a white-light He-Cd laser are used for one-step recording of the complex amplitude of the object with a color CCD camera, in which a phase shift is introduced with an achromatic phase shifter based on the geometric phase. Three color images are reconstructed and successfully combined in a computer by use of Fresnel transformation based on a convolution.
authors.forename: Jun-Ichi
authors.initials: J
authors.lastname: Kato
authors.forename: Ichirou
authors.initials: I
authors.lastname: Yamaguchi
authors.forename: Tatsuki
authors.initials: T
authors.lastname: Matsumura