| Autor: |
Dick K. G. de Boer, Ludo Haenen |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Journal of the European Optical Society-Rapid Publications, Vol 15, Iss 1, Pp 1-8 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
1990-2573 |
| DOI: |
10.1186/s41476-019-0109-0 |
| Popis: |
Abstract For lighting applications demanding high brightness, a new type of LED-based light source has been developed, the high lumen density (HLD) source (luminance > 2·109 cd/m2). The performance can be improved further, among other things by optimizing the concentrator used as extraction optics. For this optimization, much insight is obtained by ray-tracing simulations. The efficiency can be improved by more than 20% if a high-index concentrator could be used. Furthermore, it is possible to optimize the shape of the concentrator. For a low-index (n ≈ 1.5) concentrator, the light leakage can be reduced, but the gain in useful light is only marginal. For a high-index (n ≈ 1.8) concentrator, the gain in useful light amounts to a few percent. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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