Calculate the[br]- Efficiency of fresnel mirror[br]- Focus point[br]- Depth of fresnel mirror[br]- Metric System mm[br]- Some power calculation[br][br]v2:[br]- fixed: wrong calulation in power[br]- added moveable focus[br]- added some nice animation[br]- added surface sampling (to get more xy- values for 3d modeling, download this program)