Extraction optics for high lumen density sources

Dick K.G. de Boer; Ludo Haenen

doi:10.1186/s41476-019-0109-0

Extraction optics for high lumen density sources

Dick K.G. de Boer (Corresponding author), Ludo Haenen

Research output: Contribution to journal › Article › Academic › peer-review

2 Citations (Scopus)

23 Downloads (Pure)

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.

Original language	English
Article number	8
Number of pages	8
Journal	Journal of the European Optical Society
Volume	15
Issue number	1
DOIs	https://doi.org/10.1186/s41476-019-0109-0
Publication status	Published - 1 Dec 2019
Externally published	Yes

Keywords

Collimation
High-brightness source
Light-emitting diodes
Luminescence
Optical design

Access to Document

10.1186/s41476-019-0109-0

published versionFinal published version, 1.31 MB

Cite this

@article{e4b5cf8632e1480d867733718142eec6,

title = "Extraction optics for high lumen density sources",

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.",

keywords = "Collimation, High-brightness source, Light-emitting diodes, Luminescence, Optical design",

author = "{de Boer}, {Dick K.G.} and Ludo Haenen",

year = "2019",

month = dec,

day = "1",

doi = "10.1186/s41476-019-0109-0",

language = "English",

volume = "15",

journal = "Journal of the European Optical Society: Rapid Publications",

issn = "1990-2573",

publisher = "Institute of Physics",

number = "1",

}

TY - JOUR

T1 - Extraction optics for high lumen density sources

AU - de Boer, Dick K.G.

AU - Haenen, Ludo

PY - 2019/12/1

Y1 - 2019/12/1

N2 - 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.

AB - 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.

KW - Collimation

KW - High-brightness source

KW - Light-emitting diodes

KW - Luminescence

KW - Optical design

UR - http://www.scopus.com/inward/record.url?scp=85066610687&partnerID=8YFLogxK

U2 - 10.1186/s41476-019-0109-0

DO - 10.1186/s41476-019-0109-0

M3 - Article

AN - SCOPUS:85066610687

SN - 1990-2573

VL - 15

JO - Journal of the European Optical Society: Rapid Publications

JF - Journal of the European Optical Society: Rapid Publications

IS - 1

M1 - 8

ER -

Extraction optics for high lumen density sources

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this