High-resolution terahertz coded-aperture imaging for near-field three-dimensional target

Cheng-Gao Luo, Bin Deng, Hong-Qiang Wang, and Yu-Liang Qin

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Cheng-Gao Luo, Bin Deng, Hong-Qiang Wang, and Yu-Liang Qin, "High-resolution terahertz coded-aperture imaging for near-field three-dimensional target," Appl. Opt. 58, 3293-3300 (2019)

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Table of Contents Category
- Terahertz and X-ray Optics
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About this Article
History
- Original Manuscript: November 13, 2018
- Revised Manuscript: February 3, 2019
- Manuscript Accepted: February 8, 2019
- Published: April 19, 2019

Abstract

In this paper, we propose a high-resolution terahertz coded-aperture imaging method with fast beam scanning for near-field three-dimensional targets. This method utilizes a coded aperture to modulate incident terahertz waves randomly and drive the terahertz beam to scan the entire imaging space step by step. Theoretical analyses based on physical optics are performed, and simulation experiments are implemented to demonstrate the feasibility of the proposed method.

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Parameters	Values
Frequency of THz wave $f_{t}$	340 GHz
Number of the coded-aperture elements $M \times N$	$100 \times 300$
Size of each coded-aperture element $g$	0.0015 m
Focal length of the equivalent digital lens $f_{lens}$	1.00 m
Distance between the transmitter and the coded aperture $a$	1.20 m
Distance between the coded aperture and the front surface of the imaging space $l$	4.00 m

Parameters	Values
Frequency range of THz wave	330–350 GHz
Range of RPMF	[ $01.5 π$ ]
Size of the imaging space $U P s \times V Q s \times R s$	$0.65 m \times 1.95 m \times 0.5 m$
Size of each sub-cube $P s \times Q s \times R s$	$0.05 m \times 0.15 m \times 0.5 m$
Size of each target grid cell $s \times s \times s$	$0.005 m \times 0.005 m \times 0.005 m$

Parameters	Values
Frequency of THz wave $f_{t}$	340 GHz
Number of the coded-aperture elements $M \times N$	$100 \times 300$
Size of each coded-aperture element $g$	0.0015 m
Focal length of the equivalent digital lens $f_{lens}$	1.00 m
Distance between the transmitter and the coded aperture $a$	1.20 m
Distance between the coded aperture and the front surface of the imaging space $l$	4.00 m

Parameters	Values
Frequency range of THz wave	330–350 GHz
Range of RPMF	[ $01.5 π$ ]
Size of the imaging space $U P s \times V Q s \times R s$	$0.65 m \times 1.95 m \times 0.5 m$
Size of each sub-cube $P s \times Q s \times R s$	$0.05 m \times 0.15 m \times 0.5 m$
Size of each target grid cell $s \times s \times s$	$0.005 m \times 0.005 m \times 0.005 m$

High-resolution terahertz coded-aperture imaging for near-field three-dimensional target

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