Design of LED collimator for uniform illumination using two freeform lenses

• Autorzy: Zeng J. , Li X. , Ge P.

Identyfikatory

DOI

10.5277/oa180307

• Języki publikacji: EN

Abstrakty

EN

Regulating the illuminance distribution of an LED collimator to produce a uniform illumination in both the near field and the far field is a challenge in illumination design. In this paper, we present an effective method for designing two separated freeform lenses to control the illuminance distribution and the direction of the rays from the LED. The first lens redistributes the ray energy, and the second one collimates them to obtain a uniform collimated illumination. According to the conservation law of energy, Snell’s law, Fermat’s law and tangent-plane iterative method, the two freeform surfaces could be calculated simultaneously. The simulation results show that the two freeform lenses can control most of rays into an angle within ±1.5° for an LED with 1 × 1 mm size. The illuminance uniformities are higher than 0.9 in both the near field and the far field.

Słowa kluczowe

EN

illumination design; lenses; light-emitting diodes; optical design; high uniformity

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2018
• Tom: Vol. 48, nr 3
• Strony: 413--420
• Opis fizyczny: Bibliogr. 21 poz., rys.

Twórcy

autor

Zeng J.

• State Key Lab of Subtropical Building Science, School of Architecture, South China University of Technology, Guangzhou 510640, China

autor

Li X.

• Engineering Research Center for Optoelectronics of Guangdong Province, School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China

autor

Ge P.

• Engineering Research Center for Optoelectronics of Guangdong Province, School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China
• State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).