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Proceedings Paper

Three-dimensional optical techniques using Dammann gratings
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Paper Abstract

This paper summarized our work on three-dimensional optical technologies using Dammann gratings, e.g., threedimnensional Dammann gratings, three dimensional imaging using a Dammann grating, etc.. We developed threedimensional Dammann grating which can produce three-dimensional array with equal distance and equal intensity with a high-numerical-aperture lens. As we know, a lens usually has a single focal point. Fresnel zone plate can generate several axial focal points, but the intensity between them is unequal. By introducing the concept of Dammann grating into the circular phase plate, we invented Dammann zone plate(DZP) which can produce a series of axial focal points with equal intensity. Combining DZP with a Dammann grating, three-dimensional Dammann array will be generated, which is highly interesting for various applications. We also built a three–dimensional measuring system using a Dammann grating, with two cameras as the right eye and right eye, respectively. We used a 64×64 Dammann grating for generation of a square array of light spots for parallel capturing the three-dimensional profile of an object. The two cameras and the illuminating part are packaged together. After scanning the object, its three-dimensional profile will be obtained. Experimental results demonstrated the effectiveness of this technique.

Paper Details

Date Published: 26 November 2012
PDF: 8 pages
Proc. SPIE 8556, Holography, Diffractive Optics, and Applications V, 85560Z (26 November 2012); doi: 10.1117/12.999339
Show Author Affiliations
Changhe Zhou, Shanghai Institute of Optics and Fine Mechanics (China)
Junjie Yu, Shanghai Institute of Optics and Fine Mechanics (China)
Shaoqing Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Shengbin Wei, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 8556:
Holography, Diffractive Optics, and Applications V
Yunlong Sheng; Chongxiu Yu; Linsen Chen, Editor(s)

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