Abstract: By using independent component analysis,a suppression method for zero-order term is proposed in off-axis digital holography.At first,two different amplitude frames of holograms are captured by a CCD-camera to form an observation signal.Secondly,a twin-image and a zero-order term are separated by means of independent component analysis.Finally,a separated twinimage is subtracted remnants zero-order term,which eliminates the zero-order term effectively.Computer imitating experiments show that this method is better then actual phase-shift method on advantage and validity.

Key words: information optics, optics signal processing, digital holography, independent component analysis, zero-order term