Abstract

The principles of Hadamard transformation are applied to photoacoustic imaging. The advantages are twofold: reduction of the power density at the sample, and improvement of SNR due to multiplexing advantage. The compatibility of Hadamard with other multiplex transform techniques is discussed.

© 1982 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. A. Rosencwaig, “Photoacoustics and Photoacoustic Spectroscopy,” in Chemical Analysis, Vol. 57, P. J. Elving, J. S. Winefordner, I. M. Kolthoff, Eds. (Wiley, New York, 1980).
  2. A. Rosencwaig, J. Appl. Phys. 51, 2210 (1980).
    [Crossref]
  3. G. Busse, A. Rosencwaig, Appl. Phys. Lett. 36, 815 (1980).
    [Crossref]
  4. See, for example, Transform Techniques in Chemistry, P. Griffith, Ed. (Heyden, London, 1978).
    [Crossref]
  5. A. Rosencwaig, A. Gersho, J. Appl. Phys. 47, 64 (1976).
    [Crossref]
  6. H. Coufal, in Photoacoustics: Principles and Applications, H. Coufal, E. Lüscher, P. Korpiun, S. Schneider, R. Tilgner, Eds. (Vieweg, Wiesbaden, in press).
  7. S. Schneider, U. Möller, H. Köst, H. Coufal, to be published in J. Photoacoust.
  8. H. Coufal, U. Möller, S. Schneider, in Photoacoustics: Principles and Applications, H. Coufal, E. Lüscher, P. Korpiun, S. Schneider, R. Tilgner, Eds. (Vieweg, Wiesbaden, in press).

1980 (2)

A. Rosencwaig, J. Appl. Phys. 51, 2210 (1980).
[Crossref]

G. Busse, A. Rosencwaig, Appl. Phys. Lett. 36, 815 (1980).
[Crossref]

1976 (1)

A. Rosencwaig, A. Gersho, J. Appl. Phys. 47, 64 (1976).
[Crossref]

Busse, G.

G. Busse, A. Rosencwaig, Appl. Phys. Lett. 36, 815 (1980).
[Crossref]

Coufal, H.

H. Coufal, in Photoacoustics: Principles and Applications, H. Coufal, E. Lüscher, P. Korpiun, S. Schneider, R. Tilgner, Eds. (Vieweg, Wiesbaden, in press).

S. Schneider, U. Möller, H. Köst, H. Coufal, to be published in J. Photoacoust.

H. Coufal, U. Möller, S. Schneider, in Photoacoustics: Principles and Applications, H. Coufal, E. Lüscher, P. Korpiun, S. Schneider, R. Tilgner, Eds. (Vieweg, Wiesbaden, in press).

Gersho, A.

A. Rosencwaig, A. Gersho, J. Appl. Phys. 47, 64 (1976).
[Crossref]

Köst, H.

S. Schneider, U. Möller, H. Köst, H. Coufal, to be published in J. Photoacoust.

Möller, U.

H. Coufal, U. Möller, S. Schneider, in Photoacoustics: Principles and Applications, H. Coufal, E. Lüscher, P. Korpiun, S. Schneider, R. Tilgner, Eds. (Vieweg, Wiesbaden, in press).

S. Schneider, U. Möller, H. Köst, H. Coufal, to be published in J. Photoacoust.

Rosencwaig, A.

G. Busse, A. Rosencwaig, Appl. Phys. Lett. 36, 815 (1980).
[Crossref]

A. Rosencwaig, J. Appl. Phys. 51, 2210 (1980).
[Crossref]

A. Rosencwaig, A. Gersho, J. Appl. Phys. 47, 64 (1976).
[Crossref]

A. Rosencwaig, “Photoacoustics and Photoacoustic Spectroscopy,” in Chemical Analysis, Vol. 57, P. J. Elving, J. S. Winefordner, I. M. Kolthoff, Eds. (Wiley, New York, 1980).

Schneider, S.

S. Schneider, U. Möller, H. Köst, H. Coufal, to be published in J. Photoacoust.

H. Coufal, U. Möller, S. Schneider, in Photoacoustics: Principles and Applications, H. Coufal, E. Lüscher, P. Korpiun, S. Schneider, R. Tilgner, Eds. (Vieweg, Wiesbaden, in press).

Appl. Phys. Lett. (1)

G. Busse, A. Rosencwaig, Appl. Phys. Lett. 36, 815 (1980).
[Crossref]

J. Appl. Phys. (2)

A. Rosencwaig, J. Appl. Phys. 51, 2210 (1980).
[Crossref]

A. Rosencwaig, A. Gersho, J. Appl. Phys. 47, 64 (1976).
[Crossref]

Other (5)

H. Coufal, in Photoacoustics: Principles and Applications, H. Coufal, E. Lüscher, P. Korpiun, S. Schneider, R. Tilgner, Eds. (Vieweg, Wiesbaden, in press).

S. Schneider, U. Möller, H. Köst, H. Coufal, to be published in J. Photoacoust.

H. Coufal, U. Möller, S. Schneider, in Photoacoustics: Principles and Applications, H. Coufal, E. Lüscher, P. Korpiun, S. Schneider, R. Tilgner, Eds. (Vieweg, Wiesbaden, in press).

A. Rosencwaig, “Photoacoustics and Photoacoustic Spectroscopy,” in Chemical Analysis, Vol. 57, P. J. Elving, J. S. Winefordner, I. M. Kolthoff, Eds. (Wiley, New York, 1980).

See, for example, Transform Techniques in Chemistry, P. Griffith, Ed. (Heyden, London, 1978).
[Crossref]

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 (8)

Fig. 1
Fig. 1

Schematic of experimental setup: (a) experiment; (b) arrangement of Hadamard mask and aperture cell and sample; and (c) imaging of the sample by scanning using the mask.

Fig. 2
Fig. 2

PA signal of a homogeneous black sample when the Hadamard mask is moved quasi-continuously across the exciting laser beam.

Fig. 3
Fig. 3

(a) PA signal of homogeneous black sample when the Hadamard mask is moved stepwise across the laser beam. (b) Result after Hadamard transformation. Data describe the intensity profile of the exciting laser beam.

Fig. 4
Fig. 4

Quasi-continuously scanned PA signal of a black absorber with a width equal to 1 bit of the Hadamard mask.

Fig. 5
Fig. 5

(a) PA signal of sample in Fig. 3 taken at discrete locations of the mask. (b) Image of the sample after inverse Hadamard transformation.

Fig. 6
Fig. 6

Influence of corrections on the image of the sample in Fig. 5 with (a) correction for mask imperfection, (b) correction for beam profile, and (c) both corrections. (For details see text.)

Fig. 7
Fig. 7

Dependence of PA signal of a complex sample, as described in the text, from mask position: (a) amplitude, (b) phase.

Fig. 8
Fig. 8

Image of the complex sample after inverse transformation: (a) amplitude; (b) phase; (c) schematic cross section of the sample (for details see text).

Equations (2)

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

H = ( 1 1 0 1 0 1 0 1 1 ) , H - 1 = ( 1 1 - 1 1 - 1 1 - 1 1 1 ) .
X = D - 1 · H - 1 · ( Y - R ) = D - 1 · X .

Metrics