Polarisationsfiltern
Polarisationsfilter, also known as polarizing filters, are optical filters that allow light waves oscillating in a specific direction to pass through while blocking light waves oscillating in other directions. This selective transmission is based on the principle of polarization. Light is an electromagnetic wave that oscillates in all directions perpendicular to its direction of travel. Unpolarized light, like sunlight or light from a typical lamp, has oscillations in random orientations. A polarising filter has a molecular structure that acts like a series of parallel slits. Only light waves oscillating parallel to these "slits" can pass through.
When unpolarized light encounters a polarising filter, the transmitted light becomes polarized, meaning its oscillations are
Polarising filters have numerous applications. In photography, they are used to reduce glare from surfaces like