Deft Dynamics was granted US Patent #9,239,444 for “Incident and Reflective Mirror Array Focusing By Kinematic Function Control”. This patent teaches:
“An array of Fresnel reflectors is presented with an adjustable focus. The focus of the array is controlled by only a few mechanical parts and simple inputs. One preferred embodiment of this device is to collect sunlight and focus it onto a photovoltaic (PV) cell or a boiler, for the purpose of collecting solar energy. This solar collector, or heliostat, is easily adjusted so that it always directs the sun’s rays onto the PV cell or boiler.”
Learn more about K-Control here, and read the complete patent here.