Rapid prototyping of freeform optics for an LED downlighter with a dynamically adjustable beam

Eveliina Juntunen; P. Myöhänen; Eino Tetri; O. Tapaninen; J. Ojalehto; V. Heikkinen

doi:10.1177/1477153515591390

Rapid prototyping of freeform optics for an LED downlighter with a dynamically adjustable beam

Eveliina Juntunen (Corresponding Author), P. Myöhänen, Eino Tetri, O. Tapaninen, J. Ojalehto, V. Heikkinen

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

3 Citations (Scopus)

Abstract

In this paper, an LED downlight producing dynamic beam variation without any mechanically moving parts is presented. The functionality is based on an optics design using compound parabolic concentrators equipped with individual LEDs. With suitable driving of the LEDs, a dynamic far-field beam with an adjustment range of between 16° and 55° is achieved. The luminaire is used as a demonstration of the polyurethane vacuum casting rapid manufacturing method to produce low-cost freeform optics for prototypes. The simulations and measurements on the realized prototype show that the method is suitable for small series and prototype manufacturing, but also reveal potential errors in the rapid manufacturing process to be avoided in the future.

Original language	English
Pages (from-to)	885-897
Journal	Lighting Research and Technology
Volume	48
Issue number	7
Early online date	2015
DOIs	https://doi.org/10.1177/1477153515591390
Publication status	Published - 2016
MoE publication type	A1 Journal article-refereed

Keywords

optics
rapid prototyping
LED
lighting
illumination

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10.1177/1477153515591390

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title = "Rapid prototyping of freeform optics for an LED downlighter with a dynamically adjustable beam",

abstract = "In this paper, an LED downlight producing dynamic beam variation without any mechanically moving parts is presented. The functionality is based on an optics design using compound parabolic concentrators equipped with individual LEDs. With suitable driving of the LEDs, a dynamic far-field beam with an adjustment range of between 16° and 55° is achieved. The luminaire is used as a demonstration of the polyurethane vacuum casting rapid manufacturing method to produce low-cost freeform optics for prototypes. The simulations and measurements on the realized prototype show that the method is suitable for small series and prototype manufacturing, but also reveal potential errors in the rapid manufacturing process to be avoided in the future.",

keywords = "optics, rapid prototyping, LED, lighting, illumination",

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AU - Juntunen, Eveliina

AU - Myöhänen, P.

AU - Tetri, Eino

AU - Tapaninen, O.

AU - Ojalehto, J.

AU - Heikkinen, V.

PY - 2016

Y1 - 2016

N2 - In this paper, an LED downlight producing dynamic beam variation without any mechanically moving parts is presented. The functionality is based on an optics design using compound parabolic concentrators equipped with individual LEDs. With suitable driving of the LEDs, a dynamic far-field beam with an adjustment range of between 16° and 55° is achieved. The luminaire is used as a demonstration of the polyurethane vacuum casting rapid manufacturing method to produce low-cost freeform optics for prototypes. The simulations and measurements on the realized prototype show that the method is suitable for small series and prototype manufacturing, but also reveal potential errors in the rapid manufacturing process to be avoided in the future.

AB - In this paper, an LED downlight producing dynamic beam variation without any mechanically moving parts is presented. The functionality is based on an optics design using compound parabolic concentrators equipped with individual LEDs. With suitable driving of the LEDs, a dynamic far-field beam with an adjustment range of between 16° and 55° is achieved. The luminaire is used as a demonstration of the polyurethane vacuum casting rapid manufacturing method to produce low-cost freeform optics for prototypes. The simulations and measurements on the realized prototype show that the method is suitable for small series and prototype manufacturing, but also reveal potential errors in the rapid manufacturing process to be avoided in the future.

KW - optics

KW - rapid prototyping

KW - LED

KW - lighting

KW - illumination

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EP - 897

JO - Lighting Research and Technology

JF - Lighting Research and Technology

IS - 7

ER -

Rapid prototyping of freeform optics for an LED downlighter with a dynamically adjustable beam

Abstract

Keywords

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