Correlation identification of film reflecting holographic marks

Leonid I. Muravsky; Sergij O. Kostyukevych; Volodymyr M. Fitio; Taras I. Voronyak; Petro E. Shepeliavyi

doi:10.1117/12.619939

10 September 2005 Correlation identification of film reflecting holographic marks

Leonid I. Muravsky, Sergij O. Kostyukevych, Volodymyr M. Fitio, Taras I. Voronyak, Petro E. Shepeliavyi

Proceedings Volume 5908, Optical Information Systems III; 59081J (2005) https://doi.org/10.1117/12.619939
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

The new approach for creation of film reflecting holographic marks for optical security is proposed. Such marks are replicas of a reflecting master hologram recorded on a chalcogenide glass layer. To receive the master hologram, the joint power spectrum of an input phase mask or a transformed phase mask and a reference phase mask is produced at the plane of the hologram writing and is modulated by an inclined laser beam. If an inclined laser beam illuminates the replica recorded on a flexible substrate, phase noise including speckle noise is eliminated because the hologram carrier frequency exceeds greatly the limiting frequency of the phase noise power spectrum. Experimental results have shown the principal possibility to produce the high performance film reflecting holographic marks for security applications. The proposed approach can be combined with technologies for fabrication of rainbow holograms. In this case, the received rainbow holograms are the reflecting holographic marks simultaneously. Therefore, they can be verified not only visually, but also by means of automatic identification.

Citation Download Citation

Leonid I. Muravsky, Sergij O. Kostyukevych, Volodymyr M. Fitio, Taras I. Voronyak, and Petro E. Shepeliavyi "Correlation identification of film reflecting holographic marks", Proc. SPIE 5908, Optical Information Systems III, 59081J (10 September 2005); https://doi.org/10.1117/12.619939

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KEYWORDS

Holograms

Chalcogenide glass

Holography

Diffraction

Spatial light modulators

Selenium

Optical correlators

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