Electronic shear interferometry: application of a (double-) pulsed laser
| Autor: | Rudie Spooren, Astrid Aksnes Dyrseth, Mário Vaz |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Materials science
business.industry Materials Science (miscellaneous) Astrophysics::Instrumentation and Methods for Astrophysics Image processing Holographic interferometry Laser Industrial and Manufacturing Engineering Metrology law.invention Speckle pattern Interferometry Optics law Electronic speckle pattern interferometry Speckle imaging Business and International Management business |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 1559-128X |
| Popis: | The use of a double-pulsed laser in interferometric metrology relaxes the stability requirements for the experimental setup. The use of such a laser also makes it possible for one to study high-speed dynamic processes. We justify the use of a double-pulsed laser in electronic shear interferometry. We show how image subtraction can be applied to produce high-quality fringe patterns without a special aperture design. The fringe visibility is studied theoretically and is compared with the fringe visibility obtained when the closely related television-holography technique is used. The new double-pulse subtraction technique offers the possibility of compensation for laser intensity fluctuations that can affect the fringe visibility significantly in pulsed electronic shear interferometry. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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