Resolution analysis of Fresnel zone aperture lensless imaging

Jiachen Wu; Liangcai Cao

doi:10.1117/12.2573820

10 October 2020 Resolution analysis of Fresnel zone aperture lensless imaging

Jiachen Wu, Liangcai Cao

Proceedings Volume 11551, Holography, Diffractive Optics, and Applications X; 115510X (2020) https://doi.org/10.1117/12.2573820
Event: SPIE/COS Photonics Asia, 2020, Online Only

Abstract

FZA imaging is one of the most promising lensless techniques because of its simple structure without calibration. The conventional image reconstruction methods are based on geometric optics model, then the error brought by diffraction degrades the imaging quality and limits the resolution. Here we quantitatively analyze the relationship between the width of FZA zone and the imaging resolution. The effects of illumination wavelength and the degree of coherence on image quality are also discussed. To improve the imaging quality, an image reconstruction method is proposed to minimize the influence of diffraction effect.

Conference Presentation

Citation Download Citation

Jiachen Wu and Liangcai Cao "Resolution analysis of Fresnel zone aperture lensless imaging", Proc. SPIE 11551, Holography, Diffractive Optics, and Applications X, 115510X (10 October 2020); https://doi.org/10.1117/12.2573820

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