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Optical Engineering

Full parallax three-dimensional display with occlusion effect using computer generated hologram
Author(s): Hao Zhang; Neil Collings; Jing Chen; Bill A. Crossland; Daping Chu; Jinghui Xie
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Paper Abstract

Computational holography becomes highly complicated and demanding when it is employed to produce real three-dimensional (3D) images. Here we present a novel algorithm for generating a full parallax 3D computer generated hologram (CGH) with occlusion effect, which is an important property of 3D perception, but has often been neglected in most CGH related works. The ray casting technique is introduced to handle the occlusion issue. Horizontally and vertically distributed rays are projected from each hologram sample to the 3D objects to obtain the complex amplitude distribution. The proposed algorithm has no restriction on-or approximation to-the 3D objects, and it can produce reconstructed images with correct shading effect and no visible artifacts. An optical experiment is performed to validate our approach, using a phase-only spatial light modulator to optically reconstruct a 3D scene. The experimental result confirmed that the CGHs produced by our algorithm can successfully reconstruct 3D images with full parallax and occlusion effect.

Paper Details

Date Published: 1 July 2011
PDF: 6 pages
Opt. Eng. 50(7) 074003 doi: 10.1117/1.3599871
Published in: Optical Engineering Volume 50, Issue 7
Show Author Affiliations
Hao Zhang, Univ. of Cambridge (China)
Neil Collings, Univ. of Cambridge (United Kingdom)
Jing Chen, Univ. of Cambridge (United Kingdom)
Bill A. Crossland, Univ. of Cambridge (United Kingdom)
Daping Chu, Univ. of Cambridge (United Kingdom)
Jinghui Xie, Beijing Institute of Technology (China)


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