Optically Variable Device Latitude
A double-sided holographic image, located in the clear window of the polymer banknote. The element is being formed during the manufacturing process of the polymer substrate. The changing effect of the image colours appears when looking at the image at different angles of view (fig. 1).
a
b
c
Fig. 1. Optically variable device Latitude. 20 Polish Zlotych (2014):
a – front side of the banknote; b, c – view at different angles of illumination and observation.