TY - JOUR N2 - This paper presents modern methods for designing optical systems for luminaires in the context of long years of light sources development. It shows that the development of technology for producing increasingly precise optical systems has led to an evolution in the construction of luminaires with increased efficacy and utilizing more efficiently the features of a specific family of light sources. Methods for designing and modelling optical systems with the use of mathematical curves as well as advanced the free-forming method are described. The paper also shows methods for modelling light sources features, especially luminance ones, designed to make precise simulation calculations required in any luminaire design process. Knowledge of luminance distributions of light sources and precise luminance distributions of optical systems for luminaires raises the design process to a very high level, enabling positive modern light source features, such as high luminance and their small dimensions, to be used consciously while minimizing negative ones, such as discomfort glare, caused by luminaires. The paper presents the results of simulation calculations and laboratory measurements for a selected case of luminaire equipped with a discharge lamp of maximum luminance exceeding 30 million cd/m2. L1 - http://www.czasopisma.pan.pl/Content/117250/PDF/10_739-750_01501_Bpast.No.68-4_27.08.20.pdf L2 - http://www.czasopisma.pan.pl/Content/117250 PY - 2020 IS - No. 4 (i.a. Special Section on Advances in Electrical Power Engineering) EP - 750 DO - 10.24425/bpasts.2020.134168 KW - lighting technology KW - optical systems design KW - luminance modelling KW - LID calculations A1 - Żagan, W. A1 - Zalewski, S. A1 - Słomiński, S. A1 - Kubiak, K. VL - 68 DA - 31.08.2020 T1 - Methods for designing and simulating optical systems for luminaires SP - 739 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/117250 T2 - Bulletin of the Polish Academy of Sciences Technical Sciences ER -