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    Journals >Chinese Optics Letters >Volume 14 >Issue 1 >Page 010006 > Article
    • Chinese Optics Letters
    • Vol. 14, Issue 1, 010006 (2016)
    Anisotropic edge enhancement in optical scanning holography with spiral phase filtering
    Kelly K. Dobson1, Wei Jia2、*, and Ting-Chung Poon1
    Author Affiliations
  • 1Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA 24061, USA
  • 2Lab of Information Optics and Optoelectronic Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
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    DOI: 10.3788/COL201614.010006 Cite this Article Set citation alerts
    Kelly K. Dobson, Wei Jia, Ting-Chung Poon. Anisotropic edge enhancement in optical scanning holography with spiral phase filtering[J]. Chinese Optics Letters, 2016, 14(1): 010006 Copy Citation Text show less
    Two-pupil heterodyne scanning image processor.
    Fig. 1. Two-pupil heterodyne scanning image processor.
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    Electronic demodulation system (⊗ is electronic multiplier).
    Fig. 2. Electronic demodulation system (⊗ is electronic multiplier).
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    (a) Original object and (b) its logarithmic magnitude spectrum.
    Fig. 3. (a) Original object and (b) its logarithmic magnitude spectrum.
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    (a) |OTF| [fx and fy are spatial frequencies in unit of 1/mm] and (b) reconstructed image of single-offset SPP with 5 mm shift in the horizontal direction. (c) and (d) Output images of the single-offset SPP with different shift directions.
    Fig. 4. (a) |OTF| [fx and fy are spatial frequencies in unit of 1/mm] and (b) reconstructed image of single-offset SPP with 5 mm shift in the horizontal direction. (c) and (d) Output images of the single-offset SPP with different shift directions.
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    (a) and (b) |OTF| and the reconstructed image of the two-offset SPP pupil with same charge and 5 mm shift. (c) and (d) |OTF| and the reconstructed image of the two-offset SPP pupil with same charge and 2.5 mm shift.
    Fig. 5. (a) and (b) |OTF| and the reconstructed image of the two-offset SPP pupil with same charge and 5 mm shift. (c) and (d) |OTF| and the reconstructed image of the two-offset SPP pupil with same charge and 2.5 mm shift.
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    Comparison of the edge extracted images of a square object using (a) single-offset SPP and (b) two-offset SPPs.
    Fig. 6. Comparison of the edge extracted images of a square object using (a) single-offset SPP and (b) two-offset SPPs.
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    (a) |OTF| and (b) reconstructed image of the two-offset SPPs as a pupil with opposite charges and 2.5 mm shift, (c) |OTF| and (d) reconstructed image of the two-offset SPPs as a pupil with opposite charges in the vertical direction.
    Fig. 7. (a) |OTF| and (b) reconstructed image of the two-offset SPPs as a pupil with opposite charges and 2.5 mm shift, (c) |OTF| and (d) reconstructed image of the two-offset SPPs as a pupil with opposite charges in the vertical direction.
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    Improved |OTF| and the reconstructed images of the two-offset SPPs as a pupil with opposite charges in the form of Eq. (11), and φ0 is (a) and (b) 3π/4 and (c) and (d) π/2.
    Fig. 8. Improved |OTF| and the reconstructed images of the two-offset SPPs as a pupil with opposite charges in the form of Eq. (11), and φ0 is (a) and (b) 3π/4 and (c) and (d) π/2.
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    Kelly K. Dobson, Wei Jia, Ting-Chung Poon. Anisotropic edge enhancement in optical scanning holography with spiral phase filtering[J]. Chinese Optics Letters, 2016, 14(1): 010006
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