The total efficiency was measured 57.5 %, the optical efficiency 73.3 %. The temperature was taken from an array of thermo couples positioned with the positive x-axis to the west, and with the positive y-axis to the south. One can see a very small size of the focal spot corresponding to the size of the smallest optical element of the main reflector, which is one glas facet (180mm x 90mm) of OSOW 5.

Temperature area, OSOW5 at FH O/O/W, Emden, measured at the position of the glas window of the solar oven. About 600^oC in the center of a small hot area were reached at about 750 W/m² solar radiation. Oct. 1997.

Temperature profile, OSOW5 at FH O/O/W, Emden, measured at the position of the bottom of the pot inside the solar oven. About 420^oC in the center of the hot area were reached at about 750 W/m² solar radiation. Oct. 1997.