Optical encryption system using a spatial light modulator

G. Unnikrishnan; Joby Joseph; Kehar Singh

doi:10.1117/12.347734

7 May 1999 Optical encryption system using a spatial light modulator

G. Unnikrishnan, Joby Joseph, Kehar Singh

Proceedings Volume 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99); (1999) https://doi.org/10.1117/12.347734
Event: Optical Engineering for Sensing and Nanotechnology (ICOSN '99), 1999, Yokohama, Japan

Abstract

We implemented an optical encryption system that uses random Fourier plane encoding as the encryption method. In this method, data is encrypted by using a random phase function in the Fourier plane. In the earlier systems, the random phase function has been mostly implemented by fabricating random phase mask using photolithographic technique or by photographic bleaching process. We implement the binary random phase function using a Ferroelectric spatial light modulator (SLM). The use of SLM eliminates the need of fabricating the random phase mask which makes the SLMs suitable candidates in the encryption systems. The encrypted image which is a complex function is holographically recorded in a photorefractive BaTiO₃ crystal.

Citation Download Citation

G. Unnikrishnan, Joby Joseph, and Kehar Singh "Optical encryption system using a spatial light modulator", Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); https://doi.org/10.1117/12.347734

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available