title: Subtraction digital holography.
abstract: Overlapping of the desired (first-order) and undesired (zero-order) terms originating from the recorded primary-fringe patterns in digital holography is a problem without a real-time solution. We propose a procedure for suppressing the zero-order disturbance that is realizable in real time. The procedure is based on the stochastic change of the speckles in the primary-fringe patterns and on the subtraction of two such subsequent patterns. The theoretical description of the procedure is given and experimental results presented.
authors.affiliation: Institute of Physics, Bijenicka c. 46, PO Box 304, 10001 Zagreb, Croatia.
authors.forename: Nazif
authors.initials: N
authors.lastname: Demoli
authors.forename: Jurica
authors.initials: J
authors.lastname: Mestrović
authors.forename: Ivica
authors.initials: I
authors.lastname: Sović