| 摘要 |
<p>Transparent and semitransparent diffractive elements, particularly holograms with a diffractive pattern created at least in one of two following layers with different index of refraction: a transparent bearing layer (1) from polymer or copolymer having index of refraction n<1.7, and a holographic effect-enhancing, high refraction index layer (2) formed by chalcogenide based substances comprising at least one element from the group sulphur selenium, tellurium, said layer (2) has n>1.7 and its melting temperature is lower than 900° C. The diffractive element can further contain a protective layer (6) and/or an adhesive layer (7) and/or a fragile layer (8) and/or an anchoring layer (9). The diffractive pattern is either formed in said bearing layer (1) and subsequently a high refraction index layer (2) (comprising one or more layers chalcogenide based substances of different composition, which can be deposited subsequently or simultaneously) is deposited on the said layer (1), or said layer (2) is firstly deposited onto said layer (1) and diffractive pattern is mechanically formed into this system.</p> |
