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Updated: May 16, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
Published on: December 3, 2013
Enhancement of depth-of-field in a direct projection-type integral imaging system by a negative lens array
Lei Zhang1, Yong Yang, Xing Zhao
1Institute of Modern Optics, Key Laboratory of Optical Information Science and Technology Nankai University, Ministry of Education of China, Tianjin 300071, China.
Abstract:
We propose a method for enhancing depth-of-field, in which the spot size on a marginal depth plane is reduced. This method is implemented in a projection-type integral imaging system using a negative lens array without a diffuser. Numerical simulation results show that the spot size is merely 5.7% of that in a conventional system. Thus, the depth-of-field in the proposed system is enhanced by 17.5 times over that in a conventional system. Optical experiments confirm good agreement between the results and numerical predictions.
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