Simulation of fluorescent concentrators

Bendig, M.; Hanika, Johannes; Dammertz, Holger; Goldschmidt, Jan Christoph; Peters, Ian Marius; Weber, Miriam

doi:10.1109/rt.2008.4634628

Cited by 14 publications

(9 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, the described proof of concept system apparently did not use a modern approach to spectral rendering. The final work about fluorescence in graphics in recent years, by Bendig et al [BHD*08], investigated real‐time simulations of wavelength shifting effects in high performance ray‐tracing based rendering systems.…”

Section: Related Workmentioning

confidence: 99%

Handling Fluorescence in a Uni‐directional Spectral Path Tracer

Mojzík

Fichet

Wilkie

2018

Computer Graphics Forum

View full text Add to dashboard Cite

We present two separate improvements to the handling of fluorescence effects in modern uni‐directional spectral rendering systems. The first is the formulation of a new distance tracking scheme for fluorescent volume materials which exhibit a pronounced wavelength asymmetry. Such volumetric materials are an important and not uncommon corner case of wavelength‐shifting media behaviour, and have not been addressed so far in rendering literature. The second one is that we introduce an extension of Hero wavelength sampling which can handle fluorescence events, both on surfaces, and in volumes. Both improvements are useful by themselves, and can be used separately: when used together, they enable the robust inclusion of arbitrary fluorescence effects in modern uni‐directional spectral MIS path tracers. Our extension of Hero wavelength sampling is generally useful, while our proposed technique for distance tracking in strongly asymmetric media is admittedly not very efficient. However, it makes the most of a rather difficult situation, and at least allows the inclusion of such media in uni‐directional path tracers, albeit at comparatively high cost. Which is still an improvement since up to now, their inclusion was not really possible at all, due to the inability of conventional tracking schemes to generate sampling points in such volume materials.

show abstract

Section: Related Workmentioning

confidence: 99%

Handling Fluorescence in a Uni‐directional Spectral Path Tracer

Mojzík

Fichet

Wilkie

2018

Computer Graphics Forum

View full text Add to dashboard Cite

show abstract

“…Solving the bispectral rendering equation is straightforward when using spectral path tracing, e.g. [Bendig et al 2008], but of course other rendering techniques can be adopted as well.…”

Section: Bispectral Rendering Equationmentioning

confidence: 99%

Acquisition and analysis of bispectral bidirectional reflectance and reradiation distribution functions

Hullin¹,

Hanika²,

Ajdin³

et al. 2010

TOG

Self Cite

View full text Add to dashboard Cite

Fluor. yellow Fluorescent red Green spray paint Pink spray paint Dull day-glo red White paper Figure 1: Fluorescent materials absorb part of the incoming light at wavelength λ i and reradiate it at the longer wavelength λ o. We have measured bispectral BRRDFs to capture such materials and render them in the spectral environment map of a winter sunset. The bottom row depicts slices of the bispectral BRRDF, showing one rendered sphere for each pair of incident and reflected or reradiated wavelengths (λ o , λ i) ∈ [400 nm; 720 nm] × [380 nm; 720 nm]. Fluorescence is represented by the off-diagonal entries.

show abstract

“…One technique used to analyze absorption and photon transport in LSCs is to make angular measurements of the luminescence emission escaping the edge of LSCs [22][23][24][25][26]. In [22] the emitted luminescence intensity was measured as a function of detection angle for a LSC consisting of a thin film luminescent film deposited on glass.…”

Section: Introductionmentioning

confidence: 99%

“…In [22] the emitted luminescence intensity was measured as a function of detection angle for a LSC consisting of a thin film luminescent film deposited on glass. In later works a cylindrical lens coupled to the LSC edge [23][24][25] was used to 'see' inside uniformly doped LSC polymer plates. Monte Carlo simulations of the photon flux exiting the LSC edge were also presented in these publications.…”

Section: Introductionmentioning

confidence: 99%

Modelling and experimental analysis of the angular distribution of the emitted light from the edge of luminescent solar concentrators

et al. 2015

View full text Add to dashboard Cite

Luminescent solar concentrators (LSC) have the potential to provide cheap solar electricity by significantly reducing the solar cell area. However, these devices are still at the research level and several aspects of their behaviour need investigation in order to improve efficiencies. Understanding how light is absorbed/emitted and concentrated to the edge of LSCs is required to design a high efficiency device as well as identifying and overcoming the various losses present. One strategy for investigating the photon absorption and transport in LSCs as well as pinpointing the sources of losses in these devices is to look at the luminescence escaping the LSC as a function of angle. This paper presents a new model that reveals the main features of the angular distribution of light escaping a LSC edge. We compare this model with experimental measurements and provide an assessment of non-ideal losses and identify which emission angles are affected most by these losses. We investigated experimentally the effects of the absorption profile of the chromophores and re-absorption on the photon flux travelling at different angles. The effect of back surface reflectors, commonly 2 used to 'recycle lost photons', on the edge emission of LSCs has also been investigated in this work.

show abstract

Simulation of fluorescent concentrators

Cited by 14 publications

References 10 publications

Handling Fluorescence in a Uni‐directional Spectral Path Tracer

Handling Fluorescence in a Uni‐directional Spectral Path Tracer

Acquisition and analysis of bispectral bidirectional reflectance and reradiation distribution functions

Modelling and experimental analysis of the angular distribution of the emitted light from the edge of luminescent solar concentrators

Contact Info

Product

Resources

About