A method for optical encryption of three-dimensional (3D)
information by use of digital holography is presented. A
phase-shifting interferometer records the phase and amplitude
information generated by a 3D object at a plane located in the Fresnel
diffraction region with an intensity-recording device. Encryption
is performed optically by use of the Fresnel diffraction pattern of a
random phase code. Images of the 3D object with different
perspectives and focused at different planes can be generated digital
or optically after decryption with the proper key. Experimental
results are presented.
© 2000 Optical Society of America
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