Dynamic speckle imaging with low-cost devices

Autor:	Giuseppe Molesini, Maurizio Vannoni, Ricardo Arizaga, Marcelo Trivi, Héctor Rabal
Rok vydání:	2008
Předmět:	Physics Dynamic speckle Ccd camera business.industry Photography ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION General Physics and Astronomy Laser Sample (graphics) Measuring equipment law.invention Speckle pattern Optics law Electronic engineering business
Zdroj:	European Journal of Physics. 29:967-975
ISSN:	1361-6404 0143-0807
DOI:	10.1088/0143-0807/29/5/010
Popis:	Light from a rough sample surface illuminated with a laser consists of a speckle pattern. If the surface evolves with time, the pattern becomes dynamic, following the activity of the sample. This phenomenon is used both in research and in industry to monitor processes and systems that change with time. The measuring equipment generally includes high-performance CCD cameras and other expensive devices. Based on the same principle, here we describe a simplified approach where components and devices commonly available in undergraduate physics laboratories are instead used. The technique is described in detail, also reviewing the basic properties of speckle fields. Examples of the application are given, and suggestions for further investigation are provided.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b5c326329ba2c095d3de12d7ca4c2061 https://doi.org/10.1088/0143-0807/29/5/010 Zobrazit plný text záznamu