In recent years the availability of high-power semiconductor light sources like diode lasers and light-emitting diodes (LED) has increased. The NIR region (800-1100 nm) has been applied for heatinduced material machining (e.g. laser welding, cutting)  and laser drying of printing inks. [6,7] Modulating the laser point of diode lasers into a line-focus with a homogeneous intensity profile allows the exposure of two-dimensional surfaces in a single scanning step [8,9,10,11] ( Figure 1 ). Since the emission range of these light sources is small in comparison to black body radiators, an absorber must be added in case the absorption of ...
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