A POLARIZING FILTER WITH A RADIAL LINEAR OUTPUT POLARISATION, PARTICULARLY FOR PHOTOGRAPHIC LENSES

摘要

photographic apparatus is described and comprises a linear polarizing filter (1) and a liquid-crystal cell (2) which can give rise to a radial linear output polarization. The liquid-crystal cell (2) is produced in accordance with techniques that are typical for liquid-crystal displays, but without electrodes, and comprises a pair of transparent substrates (3, 4) to which an alignment film of polymer material is applied and between which a layer of liquid crystals is interposed.