Advanced topics in source modeling

Kaminski, Mark; Garcia, Kevin J.; Stevenson, Michael; Frate, Michael E.; Koshel, R. John

doi:10.1117/12.479652

Cited by 23 publications

(8 citation statements)

References 1 publication

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“…An accurate optical source model is crucial for analyzing and designing optics for LED bulbs [18][19][20][21][22]. The LED to be used is GW JDSRS1.EC-FTGP-5R8T-L1N2 3000, provided by OSRAM Opto-Semiconductors [23].…”

Section: A Model Of Led Light Sourcementioning

confidence: 99%

Optical and thermal design of light emitting diodes omnidirectional bulb

Kuo²,

Chen³

2015

Appl. Opt.

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The penetration of LED light bulbs into the lighting market is growing quickly in recent years due to significant increase of LED efficiency and reduction of cost. One major issue to be improved is the overall light bulb efficiency, which can fulfill "Energy Star for Lamps" while keeping sufficiently high efficiency. The efficiency issue results mainly from the high directionality of the LED sources and the corresponding solutions to make the emission more diverse. In this paper, a diffusion white reflection sheet (DWRS) with an array of holes is proposed as a high efficiency solution for modulating a light emission profile with SMD type LED source. The hole size is adjusted with fixed hole pitch to both maximize the efficiency and meet the omnidirectional specification. In addition, the concept of thermal plastic insertion molding metal is proposed for thermal management without fins for cooling. The prototype demonstrates the efficiency (Ef.) of 87.6% and LED pad temperature of 85°C, which shows the feasibility as a total solution for high efficiency LED omnidirectional bulbs.

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Section: A Model Of Led Light Sourcementioning

confidence: 99%

Optical and thermal design of light emitting diodes omnidirectional bulb

Kuo²,

Chen³

2015

Appl. Opt.

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“…8 Here, the filament is modeled as a coiled tube to avoid errors due to oversimplification. Most filaments are constructed as a wire coil.…”

Section: Light Source Modelingmentioning

confidence: 99%

“…8,9 Light source modeling is a crucial step for successful analysis of illumination systems-in fact, the lack of an accurate model will guarantee failure in correctly analyzing the performance of an illumination system prior to its fabrication. Advanced Systems Analysis Program ͑ASAP™͒ from Breault Research Organization, Inc. ͑Tucson, Arizona͒ is used for the modeling task.…”

Section: Introductionmentioning

confidence: 99%

Modeling of automotive interior illumination systems

Lee

Greivenkamp

2004

Opt. Eng

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Lightpipes are essential to automotive interior illumination systems. These light distribution systems are constrained by geometrical complexity, which makes both analysis and fabrication difficult. Their development depends on empirical procedures that are often inefficient and time-consuming. We review the successful modeling procedure of one complete automotive illumination light-pipe system, which includes a light source and a light pipe. The success of modeling is verified by comparing results to experimental measurement. A simple method of light-pipe evaluation based on nonsequential ray trace optical modeling for the automotive illumination industry is demonstrated. Extensive modeling of the light sources for these systems is also included.

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“…In such applications, the management of optical etendue as well as illumination contrast is important, and a precise optical model of LED light emitters is necessary to the lighting design. [3][4] However, each LED emitter may have its specific light pattern owing to the difference in chip structure, package and other factors. Thus, to develop a useful modeling algorithm, which is generally suitable to most LEDs, is demanded.…”

Section: Introductionmentioning

confidence: 99%

Optical modeling for LED in mid-field region

Sun

Lee

et al. 2007

SPIE Proceedings

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In this paper, we propose a novel LED modeling algorithm for precise 3-D light pattern simulation. Normalized cross correlation is proposed to to verify the validity of the simulation in 1-D intensity pattern as well as 2-D irradiance pattern in various mid-field distances. The model is demonstrated to obtain more than 98% in normalized cross correlation between the simulation light pattern and experimental measurement for a TIP LED emitter by Lumileds.

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Advanced topics in source modeling

Cited by 23 publications

References 1 publication

Optical and thermal design of light emitting diodes omnidirectional bulb

Optical and thermal design of light emitting diodes omnidirectional bulb

Modeling of automotive interior illumination systems

Optical modeling for LED in mid-field region

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