| 1. |
- Gren, Per, et al.
(författare)
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Tomographic reconstruction of transient acoustic fields recorded by pulsed TV holography
- 1998
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Ingår i: Applied Optics. - 1559-128X .- 2155-3165. ; 37:5, s. 834-840
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Tidskriftsartikel (refereegranskat)abstract
- Pulsed TV holography together with CT reconstruction were used to measure the three-dimensional distribution of transient acoustic fields in air. Holograms from several directions were directly recorded onto a CCD detector. From the recorded holograms, phase maps were quantitatively evaluated
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| 2. |
- Li, Xide, et al.
(författare)
-
Pulsed TV holography and tomography for the study of transient waves in air
- 1999
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Ingår i: Optics and Laser Technology. - 0030-3992 .- 1879-2545. ; 31:1, s. 23-32
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Tidskriftsartikel (refereegranskat)abstract
- Transient waves in air are recorded and reconstructed using pulsed TV holography and computerized tomography (CT). Experiments are performed with an electrical discharge between two electrodes as the acoustic wave source. The free space wave-fronts and pressure fields are reconstructed. Waves reflected and diffracted by different obstacles are also recorded and reconstructed in three dimensions. Speckle averaging and image processing techniques are used to get the high quality projection fields needed for CT reconstruction.
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| 3. |
- Li, Xide, et al.
(författare)
-
Three-Dimension Reconstruction of Wave-Front and Pressure Field of Space-Diffraction-Sound-Wave by Computerized Tomography
- 1998
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Ingår i: Guangxue Xuebao. - 0253-2239. ; 18:12, s. 1669-1675
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Tidskriftsartikel (refereegranskat)abstract
- The pulsed-carried ESPI (electron speckle photographic interference) and the with computerized tomography (CT) technique were used to evaluate the three-dimensional wavefront and pressure field distribution of diffraction field of acoustic wave through different aperture masks. Experiments were carried out by using an electrical discharge between two electrodes as sound source. The property of CT reconstruction under the conditions of noise projection was discussed
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