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Proceedings Paper

Holographic interferometry for security and forensic applications
Author(s): Sajan Ambadiyil; Sreelekshmi R. C.; V. P. Mahadevan Pillai; Radhakrishna Prabhu
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Paper Abstract

Security holograms having unique 3D images are one of the tools for enhancing the security for product and personnel authentication and anti-counterfeiting. Apart from the high technology that is required, the uniqueness of a 3D object presents a significant additional threshold for the counterfeiting of such security holograms. But, due to the development of 3D printing technology, the hurdles are disabled and allow the chances of counterfeiting. In order to overcome this, holographic interferometry is effectively utilized and the object is recorded twice before and after the state of random object change. At the time of reconstruction, two signal waves generated simultaneously interfere each other, resulting in a fringe modulation. This fringe modulation in 3D image hologram with respect to the random object change is exploited to generate a rigid and unique anticounterfeit feature. Though holographic interferometry techniques are being widely used for the non-destructive evaluation, the applicability of this technology for the security and forensic activity is less exploited. This paper describes our efforts to introduce holographic interferometry in 3D image holograms for security and forensic applications.

Paper Details

Date Published: 24 October 2016
PDF: 7 pages
Proc. SPIE 9995, Optics and Photonics for Counterterrorism, Crime Fighting, and Defence XII, 999502 (24 October 2016); doi: 10.1117/12.2242153
Show Author Affiliations
Sajan Ambadiyil, Ctr. for Development of Imaging Technology (India)
Sreelekshmi R. C., Sarabhai Institute of Science and Technology (India)
V. P. Mahadevan Pillai, Univ. of Kerala (India)
Radhakrishna Prabhu, The Robert Gordon Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 9995:
Optics and Photonics for Counterterrorism, Crime Fighting, and Defence XII
Douglas Burgess; Gari Owen; Henri Bouma; Felicity Carlysle-Davies; Robert James Stokes; Yitzhak Yitzhaky, Editor(s)

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