Date of download: 7/5/2016 Copyright © 2016 SPIE. All rights reserved. Fresnel field encryption utilizing the presence of speckles. Figure Legend: From: Digital Fresnel field encryption for three-dimensional information security Opt. Eng. 2007;46(4): doi: /

Date of download: 7/5/2016 Copyright © 2016 SPIE. All rights reserved. Numerical reconstruction of the object field from the Fresnel field using the convolution method. Figure Legend: From: Digital Fresnel field encryption for three-dimensional information security Opt. Eng. 2007;46(4): doi: /

Date of download: 7/5/2016 Copyright © 2016 SPIE. All rights reserved. Direct decryption of the object field from the encrypted Fresnel field. Figure Legend: From: Digital Fresnel field encryption for three-dimensional information security Opt. Eng. 2007;46(4): doi: /

Date of download: 7/5/2016 Copyright © 2016 SPIE. All rights reserved. Decryption results in the Fresnel field in the absence of a transfer function. Figure Legend: From: Digital Fresnel field encryption for three-dimensional information security Opt. Eng. 2007;46(4): doi: /

Date of download: 7/5/2016 Copyright © 2016 SPIE. All rights reserved. Experimental set-up: BE-SF—beam expander and spatial filter; CL—collimating lens; M—mirror; BS—beamsplitter. Figure Legend: From: Digital Fresnel field encryption for three-dimensional information security Opt. Eng. 2007;46(4): doi: /

Date of download: 7/5/2016 Copyright © 2016 SPIE. All rights reserved. (a) Hologram of the 3-D object sphere—the hologram size is 576×768pixels; (b) intensity of complex wavefront (Fresnel field) retrieved at the CCD plane at a distance 34cm from the object; and (c) corresponding phase of the wavefront. Figure Legend: From: Digital Fresnel field encryption for three-dimensional information security Opt. Eng. 2007;46(4): doi: /

Date of download: 7/5/2016 Copyright © 2016 SPIE. All rights reserved. (a) Reconstructed intensity of the object wavefront in the plane through the center of the 3-D object at a distance 34cm from the CCD; (b) Reconstructed phase of the object wavefront. Figure Legend: From: Digital Fresnel field encryption for three-dimensional information security Opt. Eng. 2007;46(4): doi: /

Date of download: 7/5/2016 Copyright © 2016 SPIE. All rights reserved. (a) Intensity of the encrypted Fresnel field; (b) the corresponding phase. Figure Legend: From: Digital Fresnel field encryption for three-dimensional information security Opt. Eng. 2007;46(4): doi: /

Date of download: 7/5/2016 Copyright © 2016 SPIE. All rights reserved. (a) Intensity and (b) phase of the transfer function multiplied in the Fourier plane. Figure Legend: From: Digital Fresnel field encryption for three-dimensional information security Opt. Eng. 2007;46(4): doi: /