| 摘要 |
<p>The invention relates to methods for recording and reading information hidden against a visualisation and can be used for visualising hidden images (marks) which identify an object and protect it against non authorised reproduction (falsification). The inventive method for producing and visualising an optically invisible mark consists in the following: an optically invisible image of the mark is formed on the surface of a studied object by modifying at least one area of said surface. Said image is then visualised. The surface of the studied object (carrying the image) is pre-treated in such a way that it is mirrored prior to forming the optically invisible image of the mark. The modification is accompanied by modifying surface energy of modified areas. The visualisation of the optically invisible image of the mark is performed by creating a metastable medium in the zone of said surface. Using said metastable medium, an optically perceived invisible image of the mark is embodied in the form of the difference of structures formed by particles of the stable phase of the metastable medium on the areas of the surface (of the studied object) having different surface energy. Various variants of the use of metastable mediums and methods for forming the optically invisible image of the mark on the surface of the studied object are also disclosed.</p> |
