| 摘要 |
FIELD: physics. ^ SUBSTANCE: method involves making protective element consisting of several layers and has a reflecting layer which enables change of colour in a defined range of the spectrum of reflected light depending on its angle of incidence or viewing angle, and on the other side the protective element also consists of several layers and has polarised latent image which can be viewed using polarisation filters. ^ EFFECT: more reliable protection from forgery and authentication of protected objects. ^ 37 cl |
