idealPV Image 5

The thermal imager can be seen at the edge of the frame on the right (white stripe). Above it is the barrel and objective lens of the illumination source. The cell and fixture are obscured behind the tablet which is showing a CCW rotated thermal image. To the left of the tablet is the variable transformer that powers the illumination source. Below the variable transformer is the power supply that acts as load and bias generator for the cell. to the right of the power supply and below the thermal display are the current and voltage measurements.

In this photo, the difference between the power supply (about 3V) and the cell sense voltage (-0.008V) are the voltage drops across the wiring, connectors and the two diodes inserted between the supply and cell. These diodes create an offset which allows the power supply to remain uni-polar while the cell moves from forward to reverse bias.