Method and opto-electronic system for reading of coded hidden images from security holograms

D. S. Lushnikov; V. I. Bobrinev; S. B. Odinokov; A. Y. Pavlov; A. I. Nikolaev

doi:10.1117/12.677181

9 June 2006 Method and opto-electronic system for reading of coded hidden images from security holograms

D. S. Lushnikov, V. I. Bobrinev, S. B. Odinokov, A. Y. Pavlov, A. I. Nikolaev

Proceedings Volume 6252, Holography 2005: International Conference on Holography, Optical Recording, and Processing of Information; 62521W (2006) https://doi.org/10.1117/12.677181
Event: Holography 2005: International Conference on Holography, Optical Recording, and Processing of Information, 2005, Varna, Bulgaria

Abstract

Methods for recording of holograms with an encoded hidden image (security holograms) and a reading-decoding optoelectronic system are presented in this paper. Security holograms are used as means for control of authenticity of the protected objects. Some modifications of the recording schemes with the code mask in the object beam are proposed. The main problem to be solved is connected with the required precision of the hologram positioning in the readout device. The algorithm of reconstruction of the decoded image is proposed in this paper. The main feature of this algorithm is the presence of the optical and electronic decoding. It allows producing of better than previously protected holograms. As an additional measure of protection of the hologram it is proposed to use the predetermined elements of the hidden image for checking of the hologram authenticity.

Citation Download Citation

D. S. Lushnikov, V. I. Bobrinev, S. B. Odinokov, A. Y. Pavlov, and A. I. Nikolaev "Method and opto-electronic system for reading of coded hidden images from security holograms", Proc. SPIE 6252, Holography 2005: International Conference on Holography, Optical Recording, and Processing of Information, 62521W (9 June 2006); https://doi.org/10.1117/12.677181

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KEYWORDS

Holograms

Image processing

Transparency

Optoelectronics

Beam splitters

3D image reconstruction

Reconstruction algorithms

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