A Simple Designed Lens for Human Centric Lighting Using LEDs
Light is generally important for human beings. Visible light supports vision and can modify circadian rhythm, and together with invisible light at longer or shorter wavelength can also make either a direct or indirect impact on human biological and mental health. For medical applications, several st...
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doaj-879a4a4166cc4fbf9cac8021467489ae2020-11-25T01:35:18ZengMDPI AGApplied Sciences2076-34172020-01-0110134310.3390/app10010343app10010343A Simple Designed Lens for Human Centric Lighting Using LEDsDuong Thi Giang0Thuy Linh La1Tran Quoc Tien2Pham Hong Duong3Quang Cong Tong4Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, VietnamVietnam Academy of Science and Technology, University of Science and Technology of Hanoi, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, VietnamInstitute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, VietnamInstitute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, VietnamInstitute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, VietnamLight is generally important for human beings. Visible light supports vision and can modify circadian rhythm, and together with invisible light at longer or shorter wavelength can also make either a direct or indirect impact on human biological and mental health. For medical applications, several studies have shown success in using light to fasten the skin regeneration in burns and to cure diseases such as newborn jaundice. In daily life, an appropriate amount and time exposure to certain types of light can result in rising of alertness and mood improvement, which leads to noticeable growth in one’s productivity. Therefore, human centric lighting can modify lighting factors to make the best of the natural characteristics of light. The seek an ideal indoor lighting system is widely carried out not only by scientists but also by architects. A qualified luminaire is considered by many factors, including luminous productivity, visual comfort and expenses; meanwhile, the idealization of illuminance is also constructed in many ways, such as widening the lamp’s surface area, changing of luminaire’s positions and applying different methods to illuminate a surface. Approaching these problems, our idea is to study the uplighting method and freeform optics using low-cost acrylic lenses. By changing lens shape and optimizing the factors which affect the illuminance such as the irradiation angle and the distance between the luminaire and the reflection surfaces, we find the most effective lens and its peaks due to each factors using the ray-tracing simulation to obtain results concerning high uniformity of illumination.https://www.mdpi.com/2076-3417/10/1/343freeform opticsuplightingray-tracing simulationhuman centric lighting |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Duong Thi Giang Thuy Linh La Tran Quoc Tien Pham Hong Duong Quang Cong Tong |
spellingShingle |
Duong Thi Giang Thuy Linh La Tran Quoc Tien Pham Hong Duong Quang Cong Tong A Simple Designed Lens for Human Centric Lighting Using LEDs Applied Sciences freeform optics uplighting ray-tracing simulation human centric lighting |
author_facet |
Duong Thi Giang Thuy Linh La Tran Quoc Tien Pham Hong Duong Quang Cong Tong |
author_sort |
Duong Thi Giang |
title |
A Simple Designed Lens for Human Centric Lighting Using LEDs |
title_short |
A Simple Designed Lens for Human Centric Lighting Using LEDs |
title_full |
A Simple Designed Lens for Human Centric Lighting Using LEDs |
title_fullStr |
A Simple Designed Lens for Human Centric Lighting Using LEDs |
title_full_unstemmed |
A Simple Designed Lens for Human Centric Lighting Using LEDs |
title_sort |
simple designed lens for human centric lighting using leds |
publisher |
MDPI AG |
series |
Applied Sciences |
issn |
2076-3417 |
publishDate |
2020-01-01 |
description |
Light is generally important for human beings. Visible light supports vision and can modify circadian rhythm, and together with invisible light at longer or shorter wavelength can also make either a direct or indirect impact on human biological and mental health. For medical applications, several studies have shown success in using light to fasten the skin regeneration in burns and to cure diseases such as newborn jaundice. In daily life, an appropriate amount and time exposure to certain types of light can result in rising of alertness and mood improvement, which leads to noticeable growth in one’s productivity. Therefore, human centric lighting can modify lighting factors to make the best of the natural characteristics of light. The seek an ideal indoor lighting system is widely carried out not only by scientists but also by architects. A qualified luminaire is considered by many factors, including luminous productivity, visual comfort and expenses; meanwhile, the idealization of illuminance is also constructed in many ways, such as widening the lamp’s surface area, changing of luminaire’s positions and applying different methods to illuminate a surface. Approaching these problems, our idea is to study the uplighting method and freeform optics using low-cost acrylic lenses. By changing lens shape and optimizing the factors which affect the illuminance such as the irradiation angle and the distance between the luminaire and the reflection surfaces, we find the most effective lens and its peaks due to each factors using the ray-tracing simulation to obtain results concerning high uniformity of illumination. |
topic |
freeform optics uplighting ray-tracing simulation human centric lighting |
url |
https://www.mdpi.com/2076-3417/10/1/343 |
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