Lloyd interferometer applied to flatness testing
| Autor: | P. H. Langenbeck |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Physics
Two beam interference Flat surface business.industry Materials Science (miscellaneous) Flatness (systems theory) Moiré pattern Interference (wave propagation) Industrial and Manufacturing Engineering Interferometry Optics Spatial frequency Business and International Management business Incidence (geometry) |
| Zdroj: | Applied optics. 6(10) |
| ISSN: | 1559-128X |
| Popis: | Lloyd's mirror experiment is applied to testing flatness of large surfaces. Because of the grazing incidence, even rough surfaces provide the characteristic interference pattern. In the case of a perfectly flat surface, that pattern consists of narrowly and equally spaced two beam interference fringes. Departures from flatness are reflected in changes of the fringe spacing. Moire techniques are used for visualizing and measuring these changes in the deviation from straightness of the Moire fringes. Qualitative examples are given. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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