Alexander Gröger, Giancarlo Pedrini, Felix Fischer, Daniel Claus, Igor Aleksenko, Stephan Reichelt. Two-wavelength digital holography through fog[J]. Journal of the European Optical Society-Rapid Publications, 2023, 19(1): 2023024
Journals >Journal of the European Optical Society-Rapid Publications >Volume 19 >Issue 1 >Page 2023024 > Article
- Journal of the European Optical Society-Rapid Publications
- Vol. 19, Issue 1, 2023024 (2023)
Fig. 1. Off-axis digital holographic setup in image plane configuration. The object is located inside a tube with a length of 27 m filled with ultrasonically generated water mist.
Fig. 2. Two life-size styrofoam heads used as test objects.
Fig. 3. (a) Digitally recorded hologram; (b) absolute value of Fourier-spectrum of (a) calculated using FFT algorithm.
Fig. 4. Imaging of one head in clear view: Photography (a); holographic reconstruction of one of the fundamental holograms (b); wrapped phase map of synthetic hologram (c); sin-cos filtered wrapped phase map (d); unwrapped phase map (e); false-color image with scale (f).
Fig. 5. Holographic measurements through fog at 4.0 AL: holographic reconstruction (a); synthetic phase map (b); sin–cos filtered synthetic phase map (c).
Fig. 6. Filtered synthetic phase images, reconstructed amplitude and conventional images at different fog densities: dense fog (a); intermediate fog (b); light fog (c), the gray scale values in the phase maps ranging from −π to π correspond to half the synthetic wavelength, i.e. approx. 300 mm.
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