applied for 300 s. Infrared pictures are similarly taken. Comparison is
made on a normal picture and the two infrared pictures. As an
example, only results of the red array are shown, Fig. 5.
In a continuous voltage operation, a marked temperature rise of
the heat sinks is clearly seen (63 C) in a continuous operation.
However, the array remains at roomtemperature (27 C) under pulse
operation. This demonstrates themerit of the pulse operation mode.