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Aliasing error in digital holography

J. P. Allebach, N. C. Gallagher, and B. Liu

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Abstract

The use of the discrete Fourier transform in digital holography introduces aliasing error in the reconstructed image. Spectrum shaping to reduce dynamic range may also result in a serious increase in aliasing error. The effect of aliasing in digital holography is analyzed. It is proposed that the bandwidth be constrained when shaping the image spectrum. Experimental results show the approach to be quite effective.

© 1976 Optical Society of America

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