Investigation of the effect of the spectral and angular selectivities of three-dimensional color security holographic stereograms on the process of the reconstruction of 3D images

D. S. Lushnikov; A. Y. Zherdev; S. B. Odinokov; V. V. Markin; A. V. Smirnov

doi:10.1117/12.2305910

24 May 2018 Investigation of the effect of the spectral and angular selectivities of three-dimensional color security holographic stereograms on the process of the reconstruction of 3D images

D. S. Lushnikov, A. Y. Zherdev, S. B. Odinokov, V. V. Markin, A. V. Smirnov

Author Affiliations +

Proceedings Volume 10677, Unconventional Optical Imaging; 106773E (2018) https://doi.org/10.1117/12.2305910
Event: SPIE Photonics Europe, 2018, Strasbourg, France

Abstract

The article presents a two-stage scheme for obtaining volume color security holographic stereograms. These holograms are digital holograms. The H1 - hologram is recorded at the first stage. The final holographic stereogram is recorded at the second stage. The image of the H1-hologram is reconstructed in the plane of pupils of the observer's eyes, when 3-D images are reconstructed from holographic stereograms. The quality of the 3-D images reconstructed from hologram stereograms directly depends on the degree of blurring of the H1 image - the hologram. The article shows mathematical calculations describing the effects of the spectral and angular selectivities of a three-dimensional color security holographic stereogram on the process of reconstructing 3-D images (the degree of blurring of the H1 image-hologram). It is shown, that the quality of security elements, such as the "flip-flop effect", for this type of hologram, has a more pronounced effect in the vertical plane than in the horizontal plane. This is due to the large influence of the spectral and angular selectivities in the vertical plane, than in the horizontal one when reconstructing the images. Photos of images, reconstructed from a three-dimensional color security holographic stereogram, are also presented in the article. These photos confirm the correctness of the presented calculations.

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D. S. Lushnikov, A. Y. Zherdev, S. B. Odinokov, V. V. Markin, and A. V. Smirnov "Investigation of the effect of the spectral and angular selectivities of three-dimensional color security holographic stereograms on the process of the reconstruction of 3D images", Proc. SPIE 10677, Unconventional Optical Imaging, 106773E (24 May 2018); https://doi.org/10.1117/12.2305910

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KEYWORDS

Holograms

3D image reconstruction

Stereo holograms

Holography

3D image processing

Image processing

Diffraction

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