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Height reconstruction algorithm for multi-incidence digital holography
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Paper 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.

Paper Details

Date Published: 7 September 2018
PDF: 5 pages
Proc. SPIE 10834, Speckle 2018: VII International Conference on Speckle Metrology, 1083424 (7 September 2018); doi: 10.1117/12.2319706
Show Author Affiliations
Marta Mikula, Warsaw Univ. of Technology (Poland)
Tomasz Kozacki, Warsaw Univ. of Technology (Poland)
Julianna Winnik, Warsaw Univ. of Technology (Poland)
Michał Józwik, Warsaw Univ. of Technology (Poland)
Juan Martinez-Carranza, Warsaw Univ. of Technology (Poland)


Published in SPIE Proceedings Vol. 10834:
Speckle 2018: VII International Conference on Speckle Metrology
Malgorzata Kujawińska; Leszek R. Jaroszewicz, Editor(s)

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