Analysis of uniformity of illumination of a freeform lens when combined with different optical sources

Sina Babadi; Roberto Ramirez-Iniguez; Tuleen Boutaleb; Tapas Kumar Mallick

doi:10.1117/12.2209358

Analysis of uniformity of illumination of a freeform lens when combined with different optical sources

Sina Babadi, Roberto Ramirez-Iniguez, Tuleen Boutaleb, Tapas Kumar Mallick

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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Abstract

This paper presents the performance analysis of a freeform lens that can be used as a 1st or secondary optic when combined with a point or an extended light source. The light source can be an LED. The purpose of the optic is to increase uniformity of illumination within the footprint. The analysis is performed on the freeform lens when combined with: (i) an isotopic or a Lambertian point light source (ii) an isotropic or a Lambertian extended light source. This paper shows that through a design based on energy mapping between a light source and a target plane it is possible to achieve uniform illumination. The ZEMAX ray tracing simulation shows that the uniformity reduces gradually when the size of the light source increases. The results indicate that a freeform lens combined with a point source can generate over 95% uniformity.

Original language	English
Title of host publication	Proceedings of SPIE: Optical Components and Materials XIII
Editors	S. Jiang, M.J.F. Digonnet
Place of Publication	San Francisco, USA
Publisher	SPIE
Pages	974417
Number of pages	6
Volume	9744
DOIs	https://doi.org/10.1117/12.2209358
Publication status	Published - 24 Feb 2016

Keywords

optical sources
energy mapping

Documents and Links

10.1117/12.2209358

Babadi, S et al (2016) Analysis of uniformity of illumination of a freeform lens when combined with different optical sources
This is the author final version of the proceedings article published by SPIE: S. Babadi ; R. Ramirez-Iniguez ; T. Boutaleb and T. Mallick " Analysis of uniformity of illumination of a freeform lens when combined with different optical sources ", Proc. SPIE 9744, Optical Components and Materials XIII, 974417 (February 24, 2016); doi:10.1117/12.2209358. Copyright 2016 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
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abstract = "This paper presents the performance analysis of a freeform lens that can be used as a 1st or secondary optic when combined with a point or an extended light source. The light source can be an LED. The purpose of the optic is to increase uniformity of illumination within the footprint. The analysis is performed on the freeform lens when combined with: (i) an isotopic or a Lambertian point light source (ii) an isotropic or a Lambertian extended light source. This paper shows that through a design based on energy mapping between a light source and a target plane it is possible to achieve uniform illumination. The ZEMAX ray tracing simulation shows that the uniformity reduces gradually when the size of the light source increases. The results indicate that a freeform lens combined with a point source can generate over 95% uniformity.",

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Analysis of uniformity of illumination of a freeform lens when combined with different optical sources. / Babadi, Sina; Ramirez-Iniguez, Roberto ; Boutaleb, Tuleen; Mallick, Tapas Kumar.

Proceedings of SPIE: Optical Components and Materials XIII. ed. / S. Jiang; M.J.F. Digonnet. Vol. 9744 San Francisco, USA : SPIE, 2016. p. 974417 974417.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AB - This paper presents the performance analysis of a freeform lens that can be used as a 1st or secondary optic when combined with a point or an extended light source. The light source can be an LED. The purpose of the optic is to increase uniformity of illumination within the footprint. The analysis is performed on the freeform lens when combined with: (i) an isotopic or a Lambertian point light source (ii) an isotropic or a Lambertian extended light source. This paper shows that through a design based on energy mapping between a light source and a target plane it is possible to achieve uniform illumination. The ZEMAX ray tracing simulation shows that the uniformity reduces gradually when the size of the light source increases. The results indicate that a freeform lens combined with a point source can generate over 95% uniformity.

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