Scanning Imaging with Equiangular Fan Beam using Chaotic Laser

Maoxuan Zhan; Lingzhen Yang; Jia Li; Yujing Zhang; Hanlu Feng

doi:10.3788/LOP221350

Laser & Optoelectronics Progress, Volume. 60, Issue 6, 0611005(2023)

Scanning Imaging with Equiangular Fan Beam using Chaotic Laser

Maoxuan Zhan¹, Lingzhen Yang^1,2、*, Jia Li¹, Yujing Zhang¹, and Hanlu Feng¹

Author Affiliations

¹College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, Shanxi , China

²Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, Shanxi , China

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Figures & Tables(10)

Fig. 1. Characteristics of chaotic laser. (a) Time series; (b) autocorrelation function

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Fig. 2. Scanning imaging structural diagrams. (a) Parallel beam structure; (b) equiangular fan beam structure; (c) relationship between parallel beam and equiangular fan beam

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Fig. 3. Simulation result. (a) Phantom information; (b) reconstructed image

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Fig. 4. Schematic of the device

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Fig. 5. Reconstruction result of equiangular fan beam tomography based on chaotic laser. (a) Reconstruction result ( $μ_{0} = 0.0008 m m^{- 1}$ ); (b) attenuation coefficient curve ( $μ_{0} = 0.0008 m m^{- 1}$ )

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Fig. 6. Cross-correlation peak curves. (a) Cross-correlation peak value of each angle at $β = 0^{\circ}$ ( $μ_{0} = 0.0008 m m^{- 1}$ ); (b) cross-correlation peak value at point C ( $μ_{0} = 0.0008 m m^{- 1}$ )

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Fig. 7. Reconstruction results of equiangular fan beam tomography based on chaotic laser. (a) Reconstruction result ( $μ_{1} = 0.1589 m m^{- 1}$ ); (b) attenuation coefficient curve ( $μ_{1} = 0.1589 m m^{- 1}$ ); (c) reconstruction result（ $μ_{2} = 0.1857 m m^{- 1}$ ）；（d）attenuation coefficient curve（ $μ_{2} = 0.1857 m m^{- 1}$ ）

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Fig. 8. Cross-correlation peak value curves. (a) Cross-correlation peak value of each angle at $β = 0 °$ ( $μ_{1} = 0.1589 m m^{- 1}$ ); (b) cross-correlation peak value at point C ( $μ_{1} = 0.1589 m m^{- 1}$ ); (c) cross-correlation peak value of each angle at $β = 0 °$ ( $μ_{2} = 0.1857 m m^{- 1}$ ); (d) cross-correlation peak value at point C ( $μ_{2} = 0.1857 m m^{- 1}$ )

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Fig. 9. Reconstruction results of equiangular fan beam tomography based on chaotic laser. (a) Reconstruction result ( $μ_{0} = 0.0008 m m^{- 1}$ ); (b) attenuation coefficient curve ( $μ_{0} = 0.0008 m m^{- 1}$ ); (c) reconstruction result ( $μ_{1} = 0.1589 m m^{- 1}$ ); (d) attenuation coefficient curve ( $μ_{1} = 0.1589 m m^{- 1}$ ); (e) reconstruction result（ $μ_{2} = 0.1857 m m^{- 1}$ ）；（f）attenuation coefficient curve（ $μ_{2} = 0.1857 m m^{- 1}$ ）

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Table 1. Comparison of contrast ratio between two imaging methods
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Table 1. Comparison of contrast ratio between two imaging methods
Parameter Water（ $μ_{0} = 0.0008 m m^{- 1}$ ） Indian ink（ $μ_{1} = 0.1589 m m^{- 1}$ ） Indian ink（ $μ_{2} = 0.1857 m m^{- 1}$ ）
Correlation peak value 0.10444 0.06345 0.02291
Intensity 0.07496 0.04378 0.01494

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Maoxuan Zhan, Lingzhen Yang, Jia Li, Yujing Zhang, Hanlu Feng. Scanning Imaging with Equiangular Fan Beam using Chaotic Laser[J]. Laser & Optoelectronics Progress, 2023, 60(6): 0611005

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