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Título:
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Near field diffraction of cylindrical convex gratings
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Autores:
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Torcal Milla, Francisco José ;
Sánchez Brea, Luis Miguel ;
Bernabeu Martínez, Eusebio
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Tipo de documento:
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texto impreso
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Editorial:
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IOP Publishing, 2015
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Optica
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Tipo = Artículo
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Resumen:
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We analyze the field produced by a cylindrical convex diffraction grating at the Fresnel regime for several kinds of light sources, including a monochromatic quasipunctual source, finite size, and polychromatic sources. These results can help one understand the functioning of rotary optical encoder technology. A decrease in the self-image contrast is produced for finite nonpunctual sources. In addition, the polychromaticity of the source affects the smoothness of the self-images, making them quasicontinuous from a certain distance from the grating forward. Finally, we experimentally validate the obtained analytical predictions.
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En línea:
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https://eprints.ucm.es/35521/1/Bernabeu%2CE05%20postprint%2Bembargo03_16.pdf
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