Figure 9.

(a) Thermal scattering and low attenuation effect of cylindrical lens structures with 40 µm pitch manufactured from PE. (b) shows an edge detection algorithm applied to the thermal images [13]. As different distances from the hot source are tested, larger features lose their ability to be resolved by the thermal camera. At this scale of features, traditional optical design may be appropriate. (c) shows the distinctive directional blurring of features similar to Lubor’s lens in both thermal and IR simultaneously and (d) shows optical images of the same effect.