Height reconstruction algorithm for multi-incidence digital holography
Marta Mikuła , Tomasz Kozacki , Julianna Winnik , Michał Józwik , Juan Martinez-Carranza
AbstractThe 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 off-axis 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.
|Pages||1083424-1 - 1083424-5|
|Publication size in sheets||0.3|
|Book||Jaroszewicz Leszek R., Kujawińska Małgorzata, Józwik Michał (eds.): Proceedings of SPIE, Speckle 2018: VII International Conference on Speckle Metrology, vol. 10834, 2018, ISBN 9781510622975|
|Keywords in English||surface contouring, multi-incidence digital holographic microscopy, microstructure, shape measurement|
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