| 摘要 |
The invention concerns a method for manufacturing optical elements, which method comprises the steps of supplying a printing cylinder with printing elements for forming optical structures, applying optical material on the printing cylinder and creating the optical structures on the substrate material web or substrate material sheets. The invention also concerns a method for manufacturing a printing cylinder for the use in the printing unit for manufacturing optical elements, which printing cylinder comprises a printing surface. The method comprises the steps of applying a gray-scale mask on the fabrication of the printing surface, exposing photosensitive materials through the gray-scale mask with electromagnetic radiation, removing the gray-scale mask, and etching the printing surface to a printing plate or to the cylinder. The invention further concerns a printing system for carrying out the method for manufacturing optical elements. The printing system comprises a printing cylinder provided with printing elements for printing optical elements. The invention also concerns an optical element (30) comprising a substrate layer and a layer of optical structures, in which optical element the substrate layer (31) is paper. The invention still further concerns a printed optical element in which the optical structure is printed on substrate material with a printing system comprising a printing cylinder. |
