| 摘要 |
The invention relates to a multilayer body (1, 1', 2, 3, 4, 5) with an optically active first system of layers (10), whereby the first system of layers (10) is an optically variable element (OVD) with a structural layer, inside of which a diffraction grating is shaped, and the optical activity of the first system of layers (10) can be influenced by an electrically controllable second system of layers (20, 20', 40, 50, 60). |
