| Autor: |
Gert von Bally, Björn Kemper, Daniel Carl, Alexander Höink |
| Rok vydání: |
2006 |
| Předmět: |
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| Zdroj: |
SPIE Proceedings. |
| ISSN: |
0277-786X |
| Popis: |
The noise of phase distributions is an important parameter for the optimization of holographic and speckle interferometric setups as well as to quantify the measurement accuracy for the determination of optical path length changes. An algorithm for noise quantification of wrapped phase distributions is presented that is based on an enhanced sine-cosine filter with subsequent triangle function transformation. Compared to methods that calculate the standard deviation of raw phase data modulo 2 π to smoothed data obtained by spatial filtering with a sine-cosine filter, an enhanced accuracy for noise quantification is achieved that is independent of fringe number and fringe orientation. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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