Height reconstruction algorithm for multi-incidence digital holography

Marta Mikula; Tomasz Kozacki; Julianna Winnik; Michał Józwik; Juan Martinez-Carranza

doi:10.1117/12.2319706

7 September 2018 Height reconstruction algorithm for multi-incidence digital holography

Marta Mikula, Tomasz Kozacki, Julianna Winnik, Michał Józwik, Juan Martinez-Carranza

Proceedings Volume 10834, Speckle 2018: VII International Conference on Speckle Metrology; 1083424 (2018) https://doi.org/10.1117/12.2319706
Event: SPECKLE 2018: VII International Conference on Speckle Metrology, 2018, Janów Podlaski, Poland

Abstract

The aim of this work is to develop a holographic method that provides the shape reconstruction with high, interferometric accuracy and an extended measurement range. The method requires recording of a set of n holograms obtained for selected combination of illumination angles θ𝑛. The difference between the optical phases corresponding to on-axis φ0 and offaxis φ𝑛 fields allows calculating the object height. To maintain high-accuracy evaluation of height the dedicated shape reconstruction algorithm is proposed. The algorithm consists of n steps, each with several substeps. Each substep is divided into: (1) calculation of the height from φ0 and φ𝑛 ; (2) propagation of the optical fields. In this paper, the proposed algorithm is numerically validated using three types of objects.

Citation Download Citation

Marta Mikula, Tomasz Kozacki, Julianna Winnik, Michał Józwik, and Juan Martinez-Carranza "Height reconstruction algorithm for multi-incidence digital holography ", Proc. SPIE 10834, Speckle 2018: VII International Conference on Speckle Metrology, 1083424 (7 September 2018); https://doi.org/10.1117/12.2319706

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