Many optical devices have certain light diagrams, which correspond to the world standard. However, to achieve this, one can use a lens including the freeforms, which provide necessary geometry for the light distribution. Freeform surfaces have additional capabilities that may provide a better solution to the asymmetry problem with higher efficiency or fewer elements. This method implies that we know the type of source and the light distribution. In the paper various types of freeforms are considered. Results of freeform modeling forming required light distribution for a given optical source are presented. Effective methods of freeform modeling using Zemax (OpticStudio) are discussed.
Optical freeform surfaces are very popular today in such fields as lighting systems, sensors, photovoltaic concentrators, and others. The application of such surfaces allows to obtain systems with a new quality with a reduced number of optical components to ensure high consumer characteristics: small size, weight, high optical transmittance. This article presents the methods of synthesis of refractive surface for a given source and the radiation pattern of various shapes using a computer simulation cubic spline interpolation.