LED streetlamp only with reflection optics
Autori: Jafrancesco D., Mercatelli L., Sansoni P., Fontani D., Francini F.
Affiliazione autori: CNR-INO, National Institute of Optics, Largo E. Fermi, 6, Firenze, 50125, Italy
Abstract: Outdoor lighting and traffic signaling are emerging fields of application for the Light Emitting Diode technology. These sustainable power-saving illumination sources can be used thanks to the availability of high-power white LEDs that, combined with suitable lenses, permit to obtain various angular distributions of the light for many applications. The proposed LED lamp for street lighting produces high illuminance uniformity utilizing only reflective components, avoiding free-form optics: the luminous flux generated by the LEDs illuminates the roadway both directly and reflecting on the inner surface of reflectors with double curvature. It allows preventing the employment of plastic lenses, subjected to risks of yellowing and decrease of transparency. The results in terms of simulated illuminance on the road show high values of uniformity. Moreover, the optical modelling was aimed to design a configuration actually feasible from a technical point of view.
Parole chiavi: Light; Lighting; Photonics; Plastic lenses; Reflection, High power white LED; Illumination sources; Optical modelling; Reflection optics; Reflective optics; Streetlamp; Sustainable power; Traffic signaling, Light emitting diodesDOI: 10.1049/cp.2015.0161Citazioni: 1dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2021-09-19Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)