摘要： This paper presents a new luminaire for light-emitting diode (LED) lighting with an adjustable light pattern. The luminaire contains secondary optics and a surface-structured diffuser to spread the light pattern to fit a specified illumination area. The structured surface with a micro-lens array can be filled with index-matching liquid so that the lighting pattern is adjustable. A detailed simulation is presented for both optical efficiency and variation of the light pattern with variation of the refractive index of used liquid, and a corresponding experiment is demonstrated. ► A novel optical-adjustable luminaire with LED SSL is proposed. ► Optical-adjustability is achieved by index matching on surface-structured diffuser. ► Refractive index from 1.33 to 1.5 is used to continuously control the lighting pattern. ► Without sacrifice of the optical efficiency. ► More flexible lighting to intelligent lighting with high energy efficiency. 出版者： Elsevier Ltd 出版日期： 2013-07-01 出處： Optics and laser technology, 2013-07, Vol.49, p.153-155 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2012 Elsevier Ltd 識別號： ISSN: 0030-3992 識別號： EISSN: 1879-2545 識別號： DOI: 10.1016/j.optlastec.2012.12.003
