@inproceedings { , title = {Holographic interferometry for security and forensic applications.}, 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.}, conference = {12th Optics and photonics for counterterrorism, crime fighting and defence conference: co-located with the Society of Photo-optical Instrumentation Engineers (SPIE) Security and defence conference 2016}, doi = {10.1117/12.2242153}, isbn = {9781510603943}, note = {COMPLETED -- Doc rec'd 1/11/2016 LM -- Requested doc 1/11/2016 LM -- Info from Researchgate 28/10/2016 LM ADDITIONAL INFORMATION: Prabhu, Radhakrishna -- Panel B}, publicationstatus = {Published}, publisher = {Society of Photo-optical Instrumentation Engineers}, url = {http://hdl.handle.net/10059/1951}, keyword = {Holographic interferometry, Holograms, Modulation, Nondestructive evaluation, 3D printing}, year = {2016}, author = {Ambadiyil, Sajan and Sreelekshmi, R.C. and Pillai, V.P. Mahadevan and Prabhu, Radhakrishna} editor = {Burgess, Douglas and Owen, Gari and Bouma, Henri and Carlysle-Davies, Felicity and Stokes, Robert James and Yitzhaky, Yitzhak} }