15 March 1996 Optical memories for document security
Author Affiliations +
We demonstrate the use of diffractive optical memories for official documents, such as machine-readable identity or fiduciary papers. Through engineering of the diffractive micro- structures, the direction and intensity distribution of the diffracted light can be tailored to optical memories for high security, uniqueness and unambiguous verification. The proposed optical memory is of the WORM-type, that is, write-once, read-many times. In order to write in the optical memory, the diffractive structure is changed irreversibly through the interaction of the diffractive surface with a beam of laser light. We demonstrate optical memories based on diffractive structures with a memory capacity of up to 100 kBits/cm2 which are appropriate for use in securing official documents.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wayne Robert Tompkin, Rene Staub, Jean-Frederic Moser, "Optical memories for document security", Proc. SPIE 2659, Optical Security and Counterfeit Deterrence Techniques, (15 March 1996); doi: 10.1117/12.235464; https://doi.org/10.1117/12.235464

Optical storage

Information security


Computer security

Diffraction gratings


Semiconductor lasers


Compressive sensing based ptychography image encryption
Proceedings of SPIE (September 09 2015)
Absolute angular encoder based on optical diffraction
Proceedings of SPIE (August 07 2015)
High-resolution encoder using double gratings
Proceedings of SPIE (July 27 1995)
Diffractive optical code for IC-card security
Proceedings of SPIE (April 07 2000)

Back to Top