Computed tomography using broadband Bessel THz beams and phase contrast

被引：31

作者：

Bitman, Assaf ^{[1
,2
]}

Goldring, Sharone ^{[1
]}

Moshe, Inon ^{[1
]}

Zalevsky, Zeev ^{[2
]}

机构：

[1] Soreq NRC, Div Appl Phys, IL-81800 Yavne, Israel

[2] Bar Ilan Univ, Fac Engn, IL-52900 Ramat Gan, Israel

来源：

OPTICS LETTERS | 2014年 / 39卷 / 07期

关键词：

OPTICAL COHERENCE TOMOGRAPHY; TERAHERTZ;

D O I：

10.1364/OL.39.001925

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present new results demonstrating the capability of performing computed tomography (CT) using broadband Bessel terahertz (THz) beams. Nondiffractive beams such as these exhibit propagation-invariant lines of focus with an extended depth-of-field compared to conventional Gaussian beams. Using this property, we demonstrate a considerable improvement in the 3D reconstruction image of a synthetic sample through the backprojection algorithm. Only when THz Bessel beams are used, a full reconstruction of the object structure is made. Moreover, we use phase-contrast mechanism which improves the spatial resolution and reconstructed images. Our results highlight the potential in using nondiffractive Bessel beams to significantly improve 3D-image reconstruction of THz CT. (C) 2014 Optical Society of America

引用

页码：1925 / 1928

页数：4

共 24 条

[1] Refraction losses in terahertz computed tomography [J].

Abraham, E. ;

Younus, A. ;

Aguerre, C. ;

Desbarats, P. ;

Mounaix, P. .

OPTICS COMMUNICATIONS, 2010, 283 (10) :2050-2055

[2]

[Anonymous], P 7 IEEE CONS COMM N

[3] Transmission terahertz waveguide-based imaging below the diffraction limit [J].

Awad, MM ;

Cheville, RA .

APPLIED PHYSICS LETTERS, 2005, 86 (22) :1-3

[4] Three-dimensional terahertz computed tomography of human bones [J].

Bessou, Maryelle ;

Chassagne, Bruno ;

Caumes, Jean-Pascal ;

Pradere, Christophe ;

Maire, Philippe ;

Tondusson, Marc ;

Abraham, Emmanuel .

APPLIED OPTICS, 2012, 51 (28) :6738-6744

[5] Broadband THz, extended depth of focus imaging based on step phase mask aided interferometry [J].

Bitman, Assaf ;

Moshe, Inon ;

Zalevsky, Zeev .

OPTICS COMMUNICATIONS, 2013, 309 :1-5

[6] Improving depth-of field in broadband THz beams using nondiffractive Bessel beams [J].

Bitman, Assaf ;

Moshe, Inon ;

Zalevsky, Zeev .

OPTICS LETTERS, 2012, 37 (19) :4164-4166

[7] Volumetric spectral analysis of materials using terahertz-tomography techniques [J].

Brahm, A. ;

Kunz, M. ;

Riehemann, S. ;

Notni, G. ;

Tuennermann, A. .

APPLIED PHYSICS B-LASERS AND OPTICS, 2010, 100 (01) :151-158

[8]

Brahm A, 2011, PHOTONIC SPECTRA, V45, P40

[9] Imaging with terahertz radiation [J].

Chan, Wai Lam ;

Deibel, Jason ;

Mittleman, Daniel M. .

REPORTS ON PROGRESS IN PHYSICS, 2007, 70 (08) :1325-1379

[10] High-resolution optical coherence tomography over a large depth range with an axicon lens [J].

Ding, ZH ;

Ren, HW ;

Zhao, YH ;

Nelson, JS ;

Chen, ZP .

OPTICS LETTERS, 2002, 27 (04) :243-245

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