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Article

A Simple Designed Lens for Human Centric Lighting Using LEDs

1
Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
2
Vietnam Academy of Science and Technology, Graduate University of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
3
Vietnam Academy of Science and Technology, University of Science and Technology of Hanoi, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2020, 10(1), 343; https://doi.org/10.3390/app10010343
Received: 16 December 2019 / Revised: 27 December 2019 / Accepted: 28 December 2019 / Published: 2 January 2020
(This article belongs to the Section Optics and Lasers)
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. View Full-Text
Keywords: freeform optics; uplighting; ray-tracing simulation; human centric lighting freeform optics; uplighting; ray-tracing simulation; human centric lighting
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MDPI and ACS Style

Thi Giang, D.; La, T.L.; Quoc Tien, T.; Hong Duong, P.; Tong, Q.C. A Simple Designed Lens for Human Centric Lighting Using LEDs. Appl. Sci. 2020, 10, 343. https://doi.org/10.3390/app10010343

AMA Style

Thi Giang D, La TL, Quoc Tien T, Hong Duong P, Tong QC. A Simple Designed Lens for Human Centric Lighting Using LEDs. Applied Sciences. 2020; 10(1):343. https://doi.org/10.3390/app10010343

Chicago/Turabian Style

Thi Giang, Duong, Thuy Linh La, Tran Quoc Tien, Pham Hong Duong, and Quang Cong Tong. 2020. "A Simple Designed Lens for Human Centric Lighting Using LEDs" Applied Sciences 10, no. 1: 343. https://doi.org/10.3390/app10010343

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