Extending the depth-of-field and ranging the scene with a shifted phase mask

Liang Zhou; Qiusha Shan; Zhaohui Liu; Wenji She

doi:10.1117/12.2506453

7 November 2018 Extending the depth-of-field and ranging the scene with a shifted phase mask

Liang Zhou, Qiusha Shan, Zhaohui Liu, Wenji She

Proceedings Volume 10832, Fifth Conference on Frontiers in Optical Imaging Technology and Applications; 108320B (2018) https://doi.org/10.1117/12.2506453
Event: Fifth Conference on Frontiers in Optical Imaging Technology and Applications, 2018, Changchun, China

Abstract

Since the concept of wavefront coding was proposed, many types of phase masks have been reported to extend the depth-of-field of imaging system. Unfortunately there exist some unpleasant image artifacts in the final decoded images, especially for asymmetric phas1 e masks. In this paper, we illustrate a technique that involve shifting a phase mask laterally in pupil plane to introduce axial defocus to an imaging system, which can further be used to determine the defocus map according to the amount of image artifacts. This eventually enables recovery of extended depth-of-filed, artifacts-free decoded images together with a range map. Theoretical analyses and experimental results indicate the effectiveness of this method. Keywords: wavefront coding,

Citation Download Citation

Liang Zhou, Qiusha Shan, Zhaohui Liu, and Wenji She "Extending the depth-of-field and ranging the scene with a shifted phase mask", Proc. SPIE 10832, Fifth Conference on Frontiers in Optical Imaging Technology and Applications, 108320B (7 November 2018); https://doi.org/10.1117/12.2506453

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