Li Yang, Yuli Lou, Chongguang Li, Rende Wang, Huaying Wang, Zhao Dong, Jinbin Gui, Qinghe Song, Qingwei Liu. Edge Extraction Technologies Based on an Optical Scanning Holographic System[J]. Laser & Optoelectronics Progress, 2020, 57(23): 230901
- Laser & Optoelectronics Progress
- Vol. 57, Issue 23, 230901 (2020)
Fig. 1. Schematic of OSH system
Fig. 2. Experimental results of OSH system with annular pupil. (a) Original object; (b) transmittance distribution of annular pupil (ε=0.5); (c) reconstruction image of complex hologram; (d) normalized intensity of the position of the dotted line in Fig. 2 (c); (e) local normalized intensity
Fig. 3. Experimental results of OSH system using LG beam-axis cone lens pupil. (a) Transmittance distribution of LG beam-axis cone pupil (ε=0.5); (b) reconstruction image of complex hologram; (c) normalized intensity of the position of the dotted line in Fig. 3 (b); (d) local normalized intensity
Fig. 4. Reconstructed images and normalized intensity using LG beam-axis cone lens pupil with different aperture ratios. (a)(e) ε=0.3; (b)(f) ε=0.5; (c)(g) ε=0.7; (d)(h) ε=0.9
Fig. 5. Experimental results for a complex object (ε=0.5). (a) Original object; (b) reconstruction image of complex hologram; (c) reconstruction image in the vertical direction; (d) reconstruction image in the horizontal direction
Fig. 6. Reconstructed images and normalized intensity of a complex hologram using amplitude-type pupils with power function distribution under different powers. (a) Transmittance distribution of amplitude type pupil with power function distribution (n0=1); (b)(e) n0=1; (c)(f) n0=2; (d)(g) n0=3
Fig. 7. Reconstructed images and normalized intensity using two kinds of pupils for the rectangular object. (a) Original object; (b)(c)(d) LG beam-axis cone lens pupil (ε=0.5); (e)(f)(g) amplitude type pupil with power function distribution (n0=1)
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Table 1. Comparison of image quality after edge extraction using ring pupil and LG beam-axis cone lens pupil at the same aperture ratio (ε=0.5)
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Table 2. Comparison of image quality after edge extraction using LG beam-axis cone lens at different aperture ratios
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Table 3. Comparison of image quality after edge extraction using amplitude type pupil with different power distributions
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Table 4. Comparison of image quality after edge extraction using LG beam-axis cone lens pupil (ε=0.5) and power function distribution amplitude type pupil (n0=1)
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