METHOD AND DEVICE FOR FORMING OBJECTS HAVING VARIABLE OPTICAL PROPERTIES AND OBJECT THUS OBTAINED

摘要

The object (10) has: a first surface (14) at least one zone of which bears a first grating (13) configured to polarise light; and a second surface (16), separate from the first surface and not contained in the same plane as the first surface, at least one zone of which bears a second grating (15) configured to polarise light, at least one of said zones bearing a nanostructure having a periodic structure having a period between about one hundred and one thousand nanometres, which structure is produced by a laser beam, said nanostructure forming one of said gratings or decreasing the polarisation of one of said gratings. In embodiments: said nanostructure forms one of said gratings for polarising light; or said nanostructure decreases the polarisation of one of said gratings.