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Sparsity based Terahertz reflective off-axis digital holography
Date Issued
2017-04-24
Date Available
2017-08-17T15:47:17Z
Abstract
Terahertz radiation lies between the microwave and infrared regions in the electromagnetic spectrum. Emitted frequencies range from 0.1 to 10 THz with corresponding wavelengths ranging from 30 m to 3 mm. In this paper, a continuous-wave Terahertz off-axis digital holographic system is described. A Gaussian fitting method and image normalisation techniques were employed on the recorded hologram to improve the image resolution. A synthesised contrast enhanced hologram is then digitally constructed. Numerical reconstruction is achieved using the angular spectrum method of the filtered off-axis hologram. A sparsity based compression technique is introduced before numerical data reconstruction in order to reduce the dataset required for hologram reconstruction. Results prove that a tiny amount of sparse dataset is sufficient in order to reconstruct the hologram with good image quality.
Sponsorship
Science Foundation Ireland
Other Sponsorship
Insight Research Centre
Type of Material
Conference Publication
Publisher
Society of Photo-optical Instrumentation Engineers (SPIE)
Copyright (Published Version)
2017 SPIE
Language
English
Status of Item
Peer reviewed
Part of
Hrabovský, M., Sheridan, J. T. and Fimia, F. (eds.). Holography: Advances and Modern Trends V (Volume 10233)
Conference Details
Holography: Advances and Modern Trends V, Prague, Czech Republic, 24 April 2017
This item is made available under a Creative Commons License
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