Near field diffraction of steel tape gratings illuminated with finite-size incoherent sources

Steel tape gratings are diffraction gratings engraved on a steel substrate, whose slits are commonly manufactured by laser ablation. They behave as amplitude diffraction gratings, since the engraved slits act as strong scatters. Here, we extend previous works to the case of finite-size illumination...

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Bibliographic Details
Authors: Torcal Milla, Francisco José, Sánchez Brea, Luis Miguel
Format: article
Publication Date:2022
Country:España
Institution:Universidad Complutense de Madrid (UCM)
Repository:Docta Complutense
Language:English
OAI Identifier:oai:docta.ucm.es:20.500.14352/72459
Online Access:https://hdl.handle.net/20.500.14352/72459
Access Level:Open access
Keyword:535
Steel tape grating
Talbot effect
Optical encoder
Roughness
Óptica (Física)
2209.19 Óptica Física
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oai_identifier_str oai:docta.ucm.es:20.500.14352/72459
network_acronym_str ES
network_name_str España
repository_id_str
spelling Near field diffraction of steel tape gratings illuminated with finite-size incoherent sourcesTorcal Milla, Francisco JoséSánchez Brea, Luis Miguel535Steel tape gratingTalbot effectOptical encoderRoughnessÓptica (Física)2209.19 Óptica FísicaSteel tape gratings are diffraction gratings engraved on a steel substrate, whose slits are commonly manufactured by laser ablation. They behave as amplitude diffraction gratings, since the engraved slits act as strong scatters. Here, we extend previous works to the case of finite-size illumination sources, as they are used in applications such as optical encoders, where LEDs are commonly used as illumination sources. We obtain an analytical formulation for the near field behavior of this kind of gratings. When the light source increases its size, a decreasing in the contrast of the self-images is added to the effect of the surficial roughness. The agreement between analytical and numerical results is high, validating the obtained formulation. Besides, these results could be crucial in metrological applications in which steel tape gratings or other diffractive optical elements engraved on steel substrates are used, providing with a theoretical formalism to analyze the near field propagation of light after reflecting in them.ElsevierUniversidad Complutense de Madrid20222022-02-0120222022-02-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/72459reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttps://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/724592026-06-02T12:44:21Z
dc.title.none.fl_str_mv Near field diffraction of steel tape gratings illuminated with finite-size incoherent sources
title Near field diffraction of steel tape gratings illuminated with finite-size incoherent sources
spellingShingle Near field diffraction of steel tape gratings illuminated with finite-size incoherent sources
Torcal Milla, Francisco José
535
Steel tape grating
Talbot effect
Optical encoder
Roughness
Óptica (Física)
2209.19 Óptica Física
title_short Near field diffraction of steel tape gratings illuminated with finite-size incoherent sources
title_full Near field diffraction of steel tape gratings illuminated with finite-size incoherent sources
title_fullStr Near field diffraction of steel tape gratings illuminated with finite-size incoherent sources
title_full_unstemmed Near field diffraction of steel tape gratings illuminated with finite-size incoherent sources
title_sort Near field diffraction of steel tape gratings illuminated with finite-size incoherent sources
dc.creator.none.fl_str_mv Torcal Milla, Francisco José
Sánchez Brea, Luis Miguel
author Torcal Milla, Francisco José
author_facet Torcal Milla, Francisco José
Sánchez Brea, Luis Miguel
author_role author
author2 Sánchez Brea, Luis Miguel
author2_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 535
Steel tape grating
Talbot effect
Optical encoder
Roughness
Óptica (Física)
2209.19 Óptica Física
topic 535
Steel tape grating
Talbot effect
Optical encoder
Roughness
Óptica (Física)
2209.19 Óptica Física
description Steel tape gratings are diffraction gratings engraved on a steel substrate, whose slits are commonly manufactured by laser ablation. They behave as amplitude diffraction gratings, since the engraved slits act as strong scatters. Here, we extend previous works to the case of finite-size illumination sources, as they are used in applications such as optical encoders, where LEDs are commonly used as illumination sources. We obtain an analytical formulation for the near field behavior of this kind of gratings. When the light source increases its size, a decreasing in the contrast of the self-images is added to the effect of the surficial roughness. The agreement between analytical and numerical results is high, validating the obtained formulation. Besides, these results could be crucial in metrological applications in which steel tape gratings or other diffractive optical elements engraved on steel substrates are used, providing with a theoretical formalism to analyze the near field propagation of light after reflecting in them.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-02-01
2022
2022-02-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/72459
url https://hdl.handle.net/20.500.14352/72459
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
https://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
https://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869403959711498240
score 15,301603

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