A webcam in Bayer-mode as a light beam profiler for the near infra-red

Beam profiles are commonly measured with complementary metal oxide semiconductors (CMOS) or charge coupled devices (CCD). The devices are fast and reliable but expensive. By making use of the fact that the Bayer-filter in commercial webcams is transparent in the near infra-red (>800 nm) and their...

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Detalles Bibliográficos
Autores principales: Langer, Gregor, Hochreiner, Armin, Burgholzer, Peter, Berer, Thomas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Applied Science Publishers 2013
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3584619/
https://www.ncbi.nlm.nih.gov/pubmed/23645943
http://dx.doi.org/10.1016/j.optlaseng.2012.12.010
Descripción
Sumario:Beam profiles are commonly measured with complementary metal oxide semiconductors (CMOS) or charge coupled devices (CCD). The devices are fast and reliable but expensive. By making use of the fact that the Bayer-filter in commercial webcams is transparent in the near infra-red (>800 nm) and their CCD chips are sensitive up to about 1100 nm, we demonstrate a cheap and simple way to measure laser beam profiles with a resolution down to around ±1 μm, which is close to the resolution of the knife-edge technique.

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