Iterative freeform lens design for prescribed irradiance on curved target

Current freeform illumination optical designs are mostly focused on producing prescribed irradiance distributions on planar targets. Here, we aim to design freeform optics that could generate a desired illumination on a curved target from a point source, which is still a challenge. We reduce the dif...

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Autores principales:	Feng Zexin, Cheng Dewen, Wang Yongtian
Formato:	article
Lenguaje:	EN
Publicado:	Institue of Optics and Electronics, Chinese Academy of Sciences 2020
Materias:	freeform optics prescribed irradiance distribution curved target iterative wavefront tailoring Optics. Light QC350-467
Acceso en línea:	https://doaj.org/article/0775899ce572464a92c83ca7d5622fc9
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spelling	oai:doaj.org-article:0775899ce572464a92c83ca7d5622fc92021-11-10T10:12:26ZIterative freeform lens design for prescribed irradiance on curved target2096-457910.29026/oea.2020.200010https://doaj.org/article/0775899ce572464a92c83ca7d5622fc92020-07-01T00:00:00Zhttp://www.oejournal.org/article/doi/10.29026/oea.2020.200010https://doaj.org/toc/2096-4579Current freeform illumination optical designs are mostly focused on producing prescribed irradiance distributions on planar targets. Here, we aim to design freeform optics that could generate a desired illumination on a curved target from a point source, which is still a challenge. We reduce the difficulties that arise from the curved target by involving its varying z-coordinates in the iterative wavefront tailoring (IWT) procedure. The new IWT-based method is developed under the stereographic coordinate system with a special mesh transformation of the source domain, which is suitable for light sources with light emissions in semi space such as LED sources. The first example demonstrates that a rectangular flat-top illumination can be generated on an undulating surface by a spherical-freeform lens for a Lambertian source. The second example shows that our method is also applicable for producing a non-uniform irradiance distribution in a circular region of the undulating surface.Feng ZexinCheng DewenWang YongtianInstitue of Optics and Electronics, Chinese Academy of Sciencesarticlefreeform opticsprescribed irradiance distributioncurved targetiterative wavefront tailoringOptics. LightQC350-467ENOpto-Electronic Advances, Vol 3, Iss 7, Pp 200010-1-200010-9 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	freeform optics prescribed irradiance distribution curved target iterative wavefront tailoring Optics. Light QC350-467
spellingShingle	freeform optics prescribed irradiance distribution curved target iterative wavefront tailoring Optics. Light QC350-467 Feng Zexin Cheng Dewen Wang Yongtian Iterative freeform lens design for prescribed irradiance on curved target
description	Current freeform illumination optical designs are mostly focused on producing prescribed irradiance distributions on planar targets. Here, we aim to design freeform optics that could generate a desired illumination on a curved target from a point source, which is still a challenge. We reduce the difficulties that arise from the curved target by involving its varying z-coordinates in the iterative wavefront tailoring (IWT) procedure. The new IWT-based method is developed under the stereographic coordinate system with a special mesh transformation of the source domain, which is suitable for light sources with light emissions in semi space such as LED sources. The first example demonstrates that a rectangular flat-top illumination can be generated on an undulating surface by a spherical-freeform lens for a Lambertian source. The second example shows that our method is also applicable for producing a non-uniform irradiance distribution in a circular region of the undulating surface.
format	article
author	Feng Zexin Cheng Dewen Wang Yongtian
author_facet	Feng Zexin Cheng Dewen Wang Yongtian
author_sort	Feng Zexin
title	Iterative freeform lens design for prescribed irradiance on curved target
title_short	Iterative freeform lens design for prescribed irradiance on curved target
title_full	Iterative freeform lens design for prescribed irradiance on curved target
title_fullStr	Iterative freeform lens design for prescribed irradiance on curved target
title_full_unstemmed	Iterative freeform lens design for prescribed irradiance on curved target
title_sort	iterative freeform lens design for prescribed irradiance on curved target
publisher	Institue of Optics and Electronics, Chinese Academy of Sciences
publishDate	2020
url	https://doaj.org/article/0775899ce572464a92c83ca7d5622fc9
work_keys_str_mv	AT fengzexin iterativefreeformlensdesignforprescribedirradianceoncurvedtarget AT chengdewen iterativefreeformlensdesignforprescribedirradianceoncurvedtarget AT wangyongtian iterativefreeformlensdesignforprescribedirradianceoncurvedtarget
_version_	1718440070788153344

Iterative freeform lens design for prescribed irradiance on curved target

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