Holographic and polarization features analysis for microplastics characterization and water monitoring

Yanmin Zhu; Yuxing Li; Jianqing Huang; Yunping Zhang; Edmund Y. Lam

doi:10.1117/12.2678293

9 August 2023 Holographic and polarization features analysis for microplastics characterization and water monitoring

Yanmin Zhu, Yuxing Li, Jianqing Huang, Yunping Zhang, Edmund Y. Lam

Proceedings Volume 12621, Multimodal Sensing and Artificial Intelligence: Technologies and Applications III; 126210X (2023) https://doi.org/10.1117/12.2678293
Event: SPIE Optical Metrology, 2023, Munich, Germany

Abstract

The assessment of microplastics (MPs) pollution and water quality monitoring raise a lot of attention in recent years. Discriminative methods are highly needed for quick and accurate in situ MP detections. Digital holography records the wavefront information of the objects and contains the morphology, refractive index, and roughness information. Polarization imaging inspects the optical anisotropy of MPs, which is related to their birefringence and material characteristics. In this work, we explore the capability of holographic and polarization imaging for the identification of MPs. The computed features, such as the angle of polarization (AoP) and degree of linear polarization (DoLP), show distinguishable characteristics of MPs. We inspect the method feasibility on MP classification as well as biological and natural particles. The proposed method shows potential use in real-time, non-contact in situ MPs detection and water pollution monitoring.

Conference Presentation

Citation Download Citation

Yanmin Zhu, Yuxing Li, Jianqing Huang, Yunping Zhang, and Edmund Y. Lam "Holographic and polarization features analysis for microplastics characterization and water monitoring", Proc. SPIE 12621, Multimodal Sensing and Artificial Intelligence: Technologies and Applications III, 126210X (9 August 2023); https://doi.org/10.1117/12.2678293

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