the multi lenticular lens covers were fabricated out of high temp plastic the spacing between lenses was 4 inches oc. these created extremely hot spots on the austenitic stainless high pressure collector the working fluid was freon R11 and it ran an rotary vane turbine which in turn spun a motorola 100 charging amp alternator to charge batteries. we cycle tested the system with great success. i have the prototype and plan on getting the uniot back into operation in the near future..