Abstract

Terahertz (THz) interferometric synthetic aperture tomography (TISAT) for confocal imaging within extended objects is demonstrated by combining attributes of synthetic aperture radar and optical coherence tomography. Algorithms recently devised for interferometric synthetic aperture microscopy are adapted to account for the diffraction—and defocusing-induced spatially varying THz beam width characteristic of narrow depth of focus, high-resolution confocal imaging. A frequency-swept two-dimensional TISAT confocal imaging instrument rapidly achieves in-focus, diffraction-limited resolution over a depth 12 times larger than the instrument’s depth of focus in a manner that may be easily extended to three dimensions and greater depths.

© 2012 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. H. Liu, H. Zhong, N. Karpowicz, Y. Chen, and X.-C. Zhang, in Proceedings of the IEEE (IEEE, 2007), pp. 1514–1527.
  2. J. Geary, Introduction to Lens Design: With Practical ZEMAX Examples (Willmann-Bell, 2002).
  3. M. Heimbeck, M. Kim, D. Gregory, and H. O. Everitt, Opt. Express 19, 9192 (2011).
    [CrossRef]
  4. C. Cull, D. Wikner, J. Mait, M. Mattheiss, and D. Brady, Appl. Opt. 49, E67 (2010).
    [CrossRef]
  5. K. B. Cooper, R. J. Dengler, N. Llombart, B. Thomas, G. Chattopadhyay, and P. H. Siegel, IEEE Trans. Terahertz Sci. Technol. 1, 169 (2011).
    [CrossRef]
  6. T. Ralston, D. Marks, P. Carney, and S. Boppart, Opt. Express 16, 2555 (2008).
    [CrossRef]
  7. T. Ralston, D. Marks, P. Carney, and S. Boppart, Nat. Phys. 3, 129 (2007).
    [CrossRef]
  8. T. Ralston, D. Marks, P. Carney, and S. Boppart, J. Opt. A 23, 1027 (2006).
    [CrossRef]

2011 (2)

K. B. Cooper, R. J. Dengler, N. Llombart, B. Thomas, G. Chattopadhyay, and P. H. Siegel, IEEE Trans. Terahertz Sci. Technol. 1, 169 (2011).
[CrossRef]

M. Heimbeck, M. Kim, D. Gregory, and H. O. Everitt, Opt. Express 19, 9192 (2011).
[CrossRef]

2010 (1)

2008 (1)

2007 (1)

T. Ralston, D. Marks, P. Carney, and S. Boppart, Nat. Phys. 3, 129 (2007).
[CrossRef]

2006 (1)

T. Ralston, D. Marks, P. Carney, and S. Boppart, J. Opt. A 23, 1027 (2006).
[CrossRef]

Boppart, S.

T. Ralston, D. Marks, P. Carney, and S. Boppart, Opt. Express 16, 2555 (2008).
[CrossRef]

T. Ralston, D. Marks, P. Carney, and S. Boppart, Nat. Phys. 3, 129 (2007).
[CrossRef]

T. Ralston, D. Marks, P. Carney, and S. Boppart, J. Opt. A 23, 1027 (2006).
[CrossRef]

Brady, D.

Carney, P.

T. Ralston, D. Marks, P. Carney, and S. Boppart, Opt. Express 16, 2555 (2008).
[CrossRef]

T. Ralston, D. Marks, P. Carney, and S. Boppart, Nat. Phys. 3, 129 (2007).
[CrossRef]

T. Ralston, D. Marks, P. Carney, and S. Boppart, J. Opt. A 23, 1027 (2006).
[CrossRef]

Chattopadhyay, G.

K. B. Cooper, R. J. Dengler, N. Llombart, B. Thomas, G. Chattopadhyay, and P. H. Siegel, IEEE Trans. Terahertz Sci. Technol. 1, 169 (2011).
[CrossRef]

Chen, Y.

H. Liu, H. Zhong, N. Karpowicz, Y. Chen, and X.-C. Zhang, in Proceedings of the IEEE (IEEE, 2007), pp. 1514–1527.

Cooper, K. B.

K. B. Cooper, R. J. Dengler, N. Llombart, B. Thomas, G. Chattopadhyay, and P. H. Siegel, IEEE Trans. Terahertz Sci. Technol. 1, 169 (2011).
[CrossRef]

Cull, C.

Dengler, R. J.

K. B. Cooper, R. J. Dengler, N. Llombart, B. Thomas, G. Chattopadhyay, and P. H. Siegel, IEEE Trans. Terahertz Sci. Technol. 1, 169 (2011).
[CrossRef]

Everitt, H. O.

Geary, J.

J. Geary, Introduction to Lens Design: With Practical ZEMAX Examples (Willmann-Bell, 2002).

Gregory, D.

Heimbeck, M.

Karpowicz, N.

H. Liu, H. Zhong, N. Karpowicz, Y. Chen, and X.-C. Zhang, in Proceedings of the IEEE (IEEE, 2007), pp. 1514–1527.

Kim, M.

Liu, H.

H. Liu, H. Zhong, N. Karpowicz, Y. Chen, and X.-C. Zhang, in Proceedings of the IEEE (IEEE, 2007), pp. 1514–1527.

Llombart, N.

K. B. Cooper, R. J. Dengler, N. Llombart, B. Thomas, G. Chattopadhyay, and P. H. Siegel, IEEE Trans. Terahertz Sci. Technol. 1, 169 (2011).
[CrossRef]

Mait, J.

Marks, D.

T. Ralston, D. Marks, P. Carney, and S. Boppart, Opt. Express 16, 2555 (2008).
[CrossRef]

T. Ralston, D. Marks, P. Carney, and S. Boppart, Nat. Phys. 3, 129 (2007).
[CrossRef]

T. Ralston, D. Marks, P. Carney, and S. Boppart, J. Opt. A 23, 1027 (2006).
[CrossRef]

Mattheiss, M.

Ralston, T.

T. Ralston, D. Marks, P. Carney, and S. Boppart, Opt. Express 16, 2555 (2008).
[CrossRef]

T. Ralston, D. Marks, P. Carney, and S. Boppart, Nat. Phys. 3, 129 (2007).
[CrossRef]

T. Ralston, D. Marks, P. Carney, and S. Boppart, J. Opt. A 23, 1027 (2006).
[CrossRef]

Siegel, P. H.

K. B. Cooper, R. J. Dengler, N. Llombart, B. Thomas, G. Chattopadhyay, and P. H. Siegel, IEEE Trans. Terahertz Sci. Technol. 1, 169 (2011).
[CrossRef]

Thomas, B.

K. B. Cooper, R. J. Dengler, N. Llombart, B. Thomas, G. Chattopadhyay, and P. H. Siegel, IEEE Trans. Terahertz Sci. Technol. 1, 169 (2011).
[CrossRef]

Wikner, D.

Zhang, X.-C.

H. Liu, H. Zhong, N. Karpowicz, Y. Chen, and X.-C. Zhang, in Proceedings of the IEEE (IEEE, 2007), pp. 1514–1527.

Zhong, H.

H. Liu, H. Zhong, N. Karpowicz, Y. Chen, and X.-C. Zhang, in Proceedings of the IEEE (IEEE, 2007), pp. 1514–1527.

Appl. Opt. (1)

IEEE Trans. Terahertz Sci. Technol. (1)

K. B. Cooper, R. J. Dengler, N. Llombart, B. Thomas, G. Chattopadhyay, and P. H. Siegel, IEEE Trans. Terahertz Sci. Technol. 1, 169 (2011).
[CrossRef]

J. Opt. A (1)

T. Ralston, D. Marks, P. Carney, and S. Boppart, J. Opt. A 23, 1027 (2006).
[CrossRef]

Nat. Phys. (1)

T. Ralston, D. Marks, P. Carney, and S. Boppart, Nat. Phys. 3, 129 (2007).
[CrossRef]

Opt. Express (2)

Other (2)

H. Liu, H. Zhong, N. Karpowicz, Y. Chen, and X.-C. Zhang, in Proceedings of the IEEE (IEEE, 2007), pp. 1514–1527.

J. Geary, Introduction to Lens Design: With Practical ZEMAX Examples (Willmann-Bell, 2002).

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (3)

Fig. 1.
Fig. 1.

(a) Diagram of the experimental apparatus, with an expanded view of the geometry of the focal pane of the illuminating beam relative to the translation of the object. Photograph of the wire test object in air (b) and covered in insulating foam (c) as seen from the direction of the illuminating THz beam.

Fig. 2.
Fig. 2.

Interferometrically acquired raw data.

Fig. 3.
Fig. 3.

Reconstructed six-wire object in air (a), (b) and covered in foam (c), (d) at three different axial locations without (a), (c) and with (b), (d) the ISAM algorithm.

Equations (2)

Equations on this page are rendered with MathJax. Learn more.

Δx,Δy=c·(f/#)ω,Δω=c2Z,andBW=c2Δz,
B(q,β)=ikα2π2A(k)exp(α2q24k2)k3α42π4A(k)2k2(q2)2exp(α2q22k2)+γ,

Metrics