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Proceedings Paper

Optical encryption in single shot digital holography
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Paper Abstract

We propose a novel optical encryption approach using a lenticular lens array (LLA) as a deterministic phase modulator and the single-shot digital holographic scheme. In the proposed scheme, the input amplitude image is encrypted and interferes with the reference wave phase, which is modulated by a LLA, then recorded holographically by a digital CCD camera to form an encrypted hologram. A decryption key is obtained from the key hologram using numerical reconstruction. The image is decrypted using a digital holographic approach after which the encrypted hologram is multiplying the numerical reconstructed key for decryption. The experimental results show that only an encrypted hologram is needed. Moreover with this approach, the decryption procedure can be rapidly accomplished using a personal computer, presenting a decrypted image of satisfactory image quality. Finally the selective sensitivity of the key rotation is also investigated.

Paper Details

Date Published: 20 September 2007
PDF: 7 pages
Proc. SPIE 6695, Optics and Photonics for Information Processing, 669516 (20 September 2007); doi: 10.1117/12.733482
Show Author Affiliations
Ching-Yang Lin, National Central Univ. (Taiwan)
Gu-Liang Chen, National Defense Univ. (Taiwan)
Ming-Kuei Kuo, National Defense Univ. (Taiwan)
Chi-Ching Chang, Ming Dao Univ. (Taiwan)
Hon-Fai Yau, National Central Univ. (Taiwan)

Published in SPIE Proceedings Vol. 6695:
Optics and Photonics for Information Processing
Abdul A.S. Awwal; Khan M. Iftekharuddin; Bahram Javidi, Editor(s)

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