A technique that combines the high speed and the high security of optical encryption with the advantages of electronic transmission, storage, and decryption is introduced. Digital phase-shifting interferometry is used for efficient recording of phase and amplitude information with an intensity recording device. The encryption is performed by use of two random phase codes, one in the object plane and another in the Fresnel domain, providing high security in the encrypted image and a key with many degrees of freedom. We describe how our technique can be adapted to encrypt either the Fraunhofer or the Fresnel diffraction pattern of the input. Electronic decryption can be performed with a one-step fast Fourier transform reconstruction procedure. Experimental results for both systems including a lensless setup are shown.

© 2000 Optical Society of America

[Optical Society of America ]

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

Related Journal Articles

• Image processing with the radial Hilbert transform: theory and experiments (OL)
• Direct method for phase retrieval from the intensity of cylindrical wave fronts (JOSAA)
• Fully phase encrypted image processor (JOSAA)
• Robust Phase-Unwrapping Algorithm with a Spatial Binary-Tree Image Decomposition (AO)
• In-Line Digital Holographic Interferometry (AO)

Related Conference Papers

• A Novel Reconstruction Method for Weak-Phase Optical Interferometry
• Interferometer for Profilometry and Tomography Using Waveguide-Type Frequency Comb Generator
• Template construction for object and biometric recognition
• Biometric verification of visible and MWIR images suitable for optical correlators
• File Encryption Software Using Fingerprint Keys Based on Double Random Encoding