Lensless Optical Encryption of Multilevel Digital Data Containers Using Spatially Incoherent Illumination

Abstract

The necessity of the correction of errors emerging during the optical encryption process led to the extensive use of data containers such as QR codes. However, due to specifics of optical encryption, QR codes are not very well suited for the task, which results in low error correction capabilities in optical experiments mainly due to easily breakable QR code’s service elements and byte data structure. In this paper, we present optical implementation of information optical encryption system utilizing new multilevel customizable digital data containers with high data density. The results of optical experiments demonstrate efficient error correction capabilities of the new data container.

Keywords

• optical encryption
• digital data containers
• spatially incoherent illumination
• spatial light modulator
• diffraction optical element
• divergent beams