Off-Axis Digital Holographic Reconstruction Based on the Spatial Filtering of the Hologram Illuminated with the Reference Wave

Abstract:

In order to eliminate the zero-order and conjugate image in off-axis digital holography, a new method based on the spatial filtering of the hologram illuminated with the reference (written as RI_h) wave is proposed. By using RI_h and the low-pass filter to do the convolution operation, the real image of the object without the zero-order and conjugate image is directly obtained. Simultaneously, the real image always appears in the center of the reconstructed image plane. The spectrum characteristic of RI_h is analyzed. A comparative analysis of the spectrum characteristics of the hologram and RI_h is discussed. The theoretical and experiment results show that: this method requires only one hologram, and do once Fourier transform. The process of designing filtering window is simple and convenient.

• Periodical: Advanced Materials Research (Volumes 760-762)
• Pages: 502-506
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.760-762.502
• Online since: September 2013
• Authors: Yan Xu, Pei Zhen Qiu
• Keywords: Conjugate Image, Off-Axis Digital Hologram, Spatial Filtering, Zero-Order

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