Abstract: Disclosed is a plasma device including at least two plasma cells, and a command unit, wherein the first and the second electrodes of a given plasma cell are independent from the corresponding first and second electrodes of the contiguous plasma cells. The electrodes of contiguous plasma cells are independently connected to the command unit. The command unit includes a high voltage generator and a radiofrequency generator which are mutually protected by a filtering element.

Abstract: A Zero-order diffractive filter comprising a first layer (1) with a periodic diffractive microstructure, forming a waveguide, and at least one adjacent second layer (2, 4, 5), wherein said first layer (1) has a refractive index that is higher than the refractive index of said second layer (2, 4, 5) by at least 0.2. At least one of said second layers (2, 4, 5) is a porous layer comprising nanopores. The period ? of the diffractive microstructure is between 100 nm and 3000 nm.

Abstract: A flexible material for optical applications in a wavelength range of ?1 to ?2, ?1 being smaller than ?2, composed of a flexible support and at least one multilayer that comprises a porous or nanoporous layer which has a low refractive index and contains inorganic nanoparticles and at least one binder, and a non-porous polymer layer which has a high refractive index and is in direct contact with the porous or nanoporous layer; said flexible material is characterized in that the maximum thicknesses of the boundary layers, in which the refractive index changes from one value to the other and which are located between the porous or nanoporous layers and the non-porous polymer layers that are in direct contact therewith, amount to 0.2 times wavelength ?2; and the difference in the refractive indices of the porous or nanoporous layers and the non-porous polymer layers is at least 0.20, 200 nm and 2500 nm being typical values for ?1 and ?2.

Abstract: A Zero-order diffractive filter comprising a first layer (1) with a periodic diffractive microstructure, forming a waveguide, and at least one adjacent second layer (2, 4, 5), wherein said first layer (1) has a refractive index that is higher than the refractive index of said second layer (2, 4, 5) by at least 0.2. At least one of said second layers (2, 4, 5) is a porous layer comprising nanopores. The period ? of the diffractive microstructure is between 100 nm and 3000 nm.

Abstract: The present invention relates to Zero-order Diffractive filters (ZOFs), comprising a first layer having periodic diffractive microstructures and a second layer, wherein said first layer has a refractive index higher than said second layer by at least 0.2, and nanoparticles located in at least one of said layers which affect the refractive index of said at least one of said layers. The present invention further relates to methods of manufacturing such ZOFs, to the use such ZOFs e.g. in security devices and to the use of specific materials for manufacturing ZOFs.

Abstract: A method for curtain coating a moving web (8) is described, wherein the total amount of the coating liquids and of the lateral flow liquid, added perpendicular to the lateral extension of the curtain (6), is deposited on the moving web (8) under formation of only a minimally thickened bead, wherein there is no need to separate the lateral flow liquid before impingement on the moving web. The corresponding device incorporates in the edge guides (7) a groove (13) having incorporated, in its surface, channels parallel to the direction of the falling curtain (6). The curtain is stabilized with the lateral flow liquid which is supplied to the groove (13), the real guide surface of the curtain, perpendicular to the lateral extension of the curtain (6).

Abstract: A method for curtain coating a moving web (8) is described, wherein the total amount of the coating liquids and of the lateral flow liquid, added perpendicular to the lateral extension of the curtain (6), is deposited on the moving web (8) under formation of only a minimally thickened bead, wherein there is no need to separate the lateral flow liquid before impingement on the moving web. The corresponding device incorporates in the edge guides (7) a groove (13) having incorporated, in its surface, channels parallel to the direction of the falling curtain (6). The curtain is stabilized with the lateral flow liquid which is supplied to the groove (13), the real guide surface of the curtain, perpendicular to the lateral extension of the curtain (6).