Spectral near field data of LED systems for optical simulations

Ingo Rotscholl; Klaus Trampert; Udo Krüger; Franz Schmidt

doi:10.1117/12.2531258

17 September 2019 Spectral near field data of LED systems for optical simulations

Ingo Rotscholl, Klaus Trampert, Udo Krüger, Franz Schmidt

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Proceedings Volume 11144, Photonics and Education in Measurement Science 2019; 111440P (2019) https://doi.org/10.1117/12.2531258
Event: Joint TC1 - TC2 International Symposium on Photonics and Education in Measurement Science 2019, 2019, Jena, Germany

Abstract

This work presents, summarizes and validates a fast, accurate and general measurement and modeling technique to obtain spectral near field data of LED systems in order to improve the optical design process of modern high quality LED systems. It requires only a minimum of goniophotometric near field measurements as well as no time-consuming angularly resolved spectral measurements. The procedure is named physically motivated basis spectra (PMBS) as its main assumption is that each piece of angularly and spatially varying spectral information can be described as the weighted sum of its physical basis spectra such as the individual semiconductors or a phosphor. Based on detailed spectral information regarding the goniophotometric measurement setup, the spectral model is obtained by solving a simple system of linear equations using the obtained near field measurements. The complete process is validated and applied to different state-of-the-art LED systems. The obtained results can be used directly in state-of-the-art ray tracers.

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Ingo Rotscholl, Klaus Trampert, Udo Krüger, and Franz Schmidt "Spectral near field data of LED systems for optical simulations", Proc. SPIE 11144, Photonics and Education in Measurement Science 2019, 111440P (17 September 2019); https://doi.org/10.1117/12.2531258

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KEYWORDS

Light emitting diodes

Near field

Ray tracing

Light sources and illumination

Data modeling

Light sources

Optical design

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