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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 20 — Oct. 4, 2004
  • pp: 4912–4921

Encryption of digital hologram of 3-D object by virtual optics

Hyun Kim, Do-Hyung Kim, and Yeon H. Lee  »View Author Affiliations

Optics Express, Vol. 12, Issue 20, pp. 4912-4921 (2004)

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We present a simple technique to encrypt a digital hologram of a three-dimensional (3-D) object into a stationary white noise by use of virtual optics and then to decrypt it digitally. In this technique the digital hologram is encrypted by our attaching a computer-generated random phase key to it and then forcing them to Fresnel propagate to an arbitrary plane with an illuminating plane wave of a given wavelength. It is shown in experiments that the proposed system is robust to blind decryptions without knowing the correct propagation distance, wavelength, and phase key used in the encryption. Signal-to-noise ratio (SNR) and mean-square-error (MSE) of the reconstructed 3-D object are calculated for various decryption distances and wavelengths, and partial use of the correct phase key.

© 2004 Optical Society of America

OCIS Codes
(090.2880) Holography : Holographic interferometry
(100.2000) Image processing : Digital image processing
(100.6890) Image processing : Three-dimensional image processing

ToC Category:
Research Papers

Original Manuscript: August 25, 2004
Revised Manuscript: September 23, 2004
Published: October 4, 2004

Hyun Kim, Do-Hyung Kim, and Yeon Lee, "Encryption of digital hologram of 3-D object by virtual optics," Opt. Express 12, 4912-4921 (2004)

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