An optimisation of a freeform lens design for LED street lighting

Sina Babadi; Roberto Ramirez-Iniguez; Tuleen Boutaleb; Tapas  Mallick

doi:10.1109/ICSAE.2016.7810167

An optimisation of a freeform lens design for LED street lighting

Sina Babadi, Roberto Ramirez-Iniguez, Tuleen Boutaleb, Tapas Mallick

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

7 Citations (Scopus)

403 Downloads (Pure)

Abstract

The number of light emitting diodes (LEDs) used in a variety of applications is increasing rapidly. A good example of an application where this is happening is street lighting. The increasing use of LEDs is due to their advantages compared to other sources of illumination. However, LEDs are not without disadvantages. One of their main drawbacks when used for street lighting without an adequate secondary optic is that they tend to produce a circular footprint with high intensity at the centre and low intensity at the edge of the illuminated area, which prevents them from satisfying national and international standards for uniformity of illumination. This paper presents a new energy mapping method to design a freeform lens to generate uniform illumination of over 95% on the target plane. The lenses presented in this paper have been designed with two different entrance apertures: (i) A hemisphere subtracted aperture (ii) a flat entrance aperture.

Original language	English
Title of host publication	2016 International Conference for Students on Applied Engineering, ICSAE 2016
Publisher	IEEE
Pages	89-92
Number of pages	4
ISBN (Electronic)	9781467390538
DOIs	https://doi.org/10.1109/ICSAE.2016.7810167
Publication status	Published - 9 Jan 2017

Keywords

LED
street lighting
freeform lens
illumination

Documents and Links

10.1109/ICSAE.2016.7810167

An optimisation of a freeform lens design for LED street lighting
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Author accepted manuscript, 427 KB

Cite this

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title = "An optimisation of a freeform lens design for LED street lighting",

abstract = "The number of light emitting diodes (LEDs) used in a variety of applications is increasing rapidly. A good example of an application where this is happening is street lighting. The increasing use of LEDs is due to their advantages compared to other sources of illumination. However, LEDs are not without disadvantages. One of their main drawbacks when used for street lighting without an adequate secondary optic is that they tend to produce a circular footprint with high intensity at the centre and low intensity at the edge of the illuminated area, which prevents them from satisfying national and international standards for uniformity of illumination. This paper presents a new energy mapping method to design a freeform lens to generate uniform illumination of over 95% on the target plane. The lenses presented in this paper have been designed with two different entrance apertures: (i) A hemisphere subtracted aperture (ii) a flat entrance aperture.",

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author = "Sina Babadi and Roberto Ramirez-Iniguez and Tuleen Boutaleb and Tapas Mallick",

note = "Lead author (student) confirmed version is AAM; no embargo; validated for discovery. Acceptance email provided Funding note: The authors would like to thank the Energy Technology Partnership (ETP), Optical Antenna Solution (OAS) and Glasgow Caledonian University for their funding to conduct this research .",

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AU - Ramirez-Iniguez, Roberto

AU - Boutaleb, Tuleen

AU - Mallick, Tapas

N1 - Lead author (student) confirmed version is AAM; no embargo; validated for discovery. Acceptance email provided Funding note: The authors would like to thank the Energy Technology Partnership (ETP), Optical Antenna Solution (OAS) and Glasgow Caledonian University for their funding to conduct this research .

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N2 - The number of light emitting diodes (LEDs) used in a variety of applications is increasing rapidly. A good example of an application where this is happening is street lighting. The increasing use of LEDs is due to their advantages compared to other sources of illumination. However, LEDs are not without disadvantages. One of their main drawbacks when used for street lighting without an adequate secondary optic is that they tend to produce a circular footprint with high intensity at the centre and low intensity at the edge of the illuminated area, which prevents them from satisfying national and international standards for uniformity of illumination. This paper presents a new energy mapping method to design a freeform lens to generate uniform illumination of over 95% on the target plane. The lenses presented in this paper have been designed with two different entrance apertures: (i) A hemisphere subtracted aperture (ii) a flat entrance aperture.

AB - The number of light emitting diodes (LEDs) used in a variety of applications is increasing rapidly. A good example of an application where this is happening is street lighting. The increasing use of LEDs is due to their advantages compared to other sources of illumination. However, LEDs are not without disadvantages. One of their main drawbacks when used for street lighting without an adequate secondary optic is that they tend to produce a circular footprint with high intensity at the centre and low intensity at the edge of the illuminated area, which prevents them from satisfying national and international standards for uniformity of illumination. This paper presents a new energy mapping method to design a freeform lens to generate uniform illumination of over 95% on the target plane. The lenses presented in this paper have been designed with two different entrance apertures: (i) A hemisphere subtracted aperture (ii) a flat entrance aperture.

KW - LED

KW - street lighting

KW - freeform lens

KW - illumination

U2 - 10.1109/ICSAE.2016.7810167

DO - 10.1109/ICSAE.2016.7810167

M3 - Conference contribution

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BT - 2016 International Conference for Students on Applied Engineering, ICSAE 2016

PB - IEEE

ER -

An optimisation of a freeform lens design for LED street lighting

Abstract

Keywords

Documents and Links

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