| Autor: |
Juan Martinez-Carranza, Julianna Winnik, Tomasz Kozacki, Michal Jozwik, Marta Mikuła |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Speckle 2018: VII International Conference on Speckle Metrology. |
| DOI: |
10.1117/12.2319706 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
