Single-pixel holographic rod-shaped particle sizing without depth search using Wigner-Ville distribution

Digital holographic measurement of rod-shaped particle size from inline holograms using a single-pixel of Wigner-Ville distribution (WVD) coefficients is proposed. The proposed sizing method detects only the spatial frequency coordinate of the single WVD output coefficient with a minimum amplitude to measure the particle size. The proposed method has advantages over conventional numerical reconstructions in that iterative and time-consuming particle depth searches are obviated. Besides its faster response, its sizing accuracy is higher than the angular spectrum method and the previous WVD-based method because it is free from errors in depth-search. The proposed method is experimentally verified by using microtube objects with different diameters.

Automated summary

This study proposes a method for measuring the size of rod-shaped particles from inline holograms using Wigner-Ville distribution (WVD) coefficients. The method eliminates the need for iterative and time-consuming particle depth searches, providing a faster response and higher sizing accuracy compared to conventional numerical reconstructions. The proposed method is experimentally validated using microtube objects of varying diameters.