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3 November 2018 Resampling ring masks in spatial spectral domain for speckle reduction in one-shot digital holography
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Abstract
A resampling ring-mask method in spatial spectral domain (RRM-SSD) is proposed for speckle reduction in one-shot digital holography. Spatial spectrum of a hologram with speckle is divided into several subspectra using the resampling ring masks. Different subspectra are individually used to obtain the corresponding reconstructed amplitude images by the angular spectrum method. With the random distribution of the speckle, averaging these uncorrelated amplitude images would successfully enable speckle-reduced reconstruction. No specific operations for hologram recording or complex process for reconstruction are required in this method. Comparison with the previous rectangular mask method in spatial domain proves the advantage of the RRM-SSD method for both speckle reduction and high-resolution reconstruction. Experimental results show that the RRM-SSD method is efficient and simple for speckle reduction, which can be widely used in holographic imaging.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2018/$25.00 © 2018 SPIE
Wenhui Zhang, Hua Zhang, Guofan Jin, Kun Liu, and Liangcai Cao "Resampling ring masks in spatial spectral domain for speckle reduction in one-shot digital holography," Optical Engineering 57(11), 113101 (3 November 2018). https://doi.org/10.1117/1.OE.57.11.113101
Received: 10 July 2018; Accepted: 16 October 2018; Published: 3 November 2018
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