2D shape reconstruction of submillimetric irregular rough particles from speckle pattern in interferometric particle imaging measurement

Yushi Fu; Hongxia Zhang; Jinghui Hou; Dagong Jia; Tiegen Liu

doi:10.1063/5.0152939

2D shape reconstruction of submillimetric irregular rough particles from speckle pattern in interferometric particle imaging measurement

Rev Sci Instrum. 2023 Jul 1;94(7):073703. doi: 10.1063/5.0152939.

Authors

Yushi Fu^{1

2}, Hongxia Zhang^{1

2}, Jinghui Hou^{1

2}, Dagong Jia^{1

2}, Tiegen Liu^{1

2}

Affiliations

¹ College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China.
² Key Laboratory of Opto-electronics Information Technology, Ministry of Education, Tianjin University, Tianjin 300072, China.

PMID: 37428023
DOI: 10.1063/5.0152939

Abstract

Particle shape is a significant feature of irregular particles. The interferometric particle imaging (IPI) technique has been introduced to retrieve submillimetric irregular rough particle shapes, while inevitable experimental noises hinder the convergence of two-dimensional (2D) particle shapes from single speckle patterns. In this work, a hybrid input-output algorithm with shrink-wrap support and oversampling smoothness constraints is utilized to suppress the Poisson noise in IPI measurement and recover accurate 2D shapes of particles. Our method is tested in numerical simulations on ice crystal shapes and actual IPI measurements on four different types of irregular, rough particles. The shape similarity of the reconstructed 2D shape has reached an average Jaccard Index score of 0.927, and the relative deviation of the reconstructed size is within 7% for all 60 tested irregular particles at the maximum shot noise level of 7.4%. Furthermore, our method has obviously reduced the uncertainty in the 3D shape reconstruction of irregular, rough particles.