Approaching real-time terahertz imaging with photo-induced coded apertures and compressed sensing

Author

Shams, M.I.B. ; Jiang, Z. ; Rahman, Sazid ; Qayyum, J. ; Cheng, L.-J. ; Xing, Huili Grace ; Fay, Patrick ; Liu, L.

Author_Institution

Dept. of Electr. Eng., Univ. of Notre Dame, Notre Dame, IN, USA

Volume

50

Issue

11

fYear

2014

fDate

May 22 2014

Firstpage

801

Lastpage

803

Abstract

Photo-induced coded-aperture imaging (PI-CAI) based on compressed sensing (CS) at 590 GHz using a WR-1.5 (500-750 GHz) vector network analyser is demonstrated. For a 256-pixel (16 × 16) frame, the acquisition time can be reduced by 40%, as compared with PI-CAI without CS, while maintaining high imaging quality. On the basis of this approach, it is envisioned that real-time (26 fps) THz imaging with 1000 pixels (32 × 32) can be realised using high-speed digital micromirror device chipsets and optimised data-acquisition software.

Keywords

compressed sensing; data acquisition; micromirrors; network analysers; terahertz wave imaging; CS; DMD chipsets; PI-CAI; VNA; WR-1.5; compressed sensing; digital micromirror device; frequency 500 GHz to 750 GHz; frequency 590 GHz; optimised data acquisition software; photoinduced coded aperture imaging; real-time THz imaging; real-time terahertz imaging; vector network analyzer;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2014.0993

Filename

6824363