Abstract

Subject of study. The index of the structural similarity between the reconstructed and reference images in multiplexed terahertz ghost imaging as a function of broadband terahertz radiation frequency ranges used is studied. Aim of study. The impact of broadband terahertz frequency band selection on the index of the structural similarity between the reference images and images reconstructed using multiplexed terahertz ghost imaging is assessed. Method. The mathematical model developed herein supports imaging of the speckle structures formed within individual frequency components within the broadband terahertz radiation band used to propagate through a transparent heterogeneous phase object. These speckle-structure images can be experimentally obtained using electrooptical detection. The image was reconstructed using multiplexed terahertz ghost imaging. Main results. A description of the mathematical model used is provided. The index of structural similarity between the images reconstructed in multiplexed terahertz ghost imaging and reference images was determined as a function of the number of iterations for various broadband terahertz radiation frequency ranges used. Practical significance. The results described herein can be used to adjust the multiplexed terahertz ghost imaging system in order to achieve the optimal ratio between the number of measurements required and the reconstructed image quality.

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