Abstract: A detector of electromagnetic radiation (RL) is described. The detector comprises: an oriented polycrystalline layer (2) of thermoelectric material, a substrate (1) superimposed on the top surface of the oriented polycrystalline layer so that the back surface (10) is in contact with the oriented polycrystalline layer, first and second electrodes spaced the one from the other and in electrical contact with the oriented polycrystalline layer. The substrate comprises at least one ceramic layer and the oriented polycrystalline layer has a crystal orientation at an angle comprised between 30 degrees and 55 degrees relative to a normal to the top surface of the substrate.

Abstract: A detector of electromagnetic radiation (RL) is described. The detector comprises: an oriented polycrystalline layer (2) of thermoelectric material, a substrate (1) superimposed on the top surface of the oriented polycrystalline layer so that the back surface (10) is in contact with the oriented polycrystalline layer, first and second electrodes spaced the one from the other and in electrical contact with the oriented polycrystalline layer. The substrate comprises at least one ceramic layer and the oriented polycrystalline layer has a crystal orientation at an angle comprised between 30 degrees and 55 degrees relative to a normal to the top surface of the substrate.

Abstract: A detector of electromagnetic radiation (RL) is described. The detector comprises: a substrate (1), an oriented polycrystalline layer (2) of thermoelectric material deposited on the top surface (10) of the substrate, first and second electrodes spaced the one from the other and in electrical contact with the oriented polycrystalline layer. The substrate comprises at least one ceramic layer and the oriented polycrystalline layer has a crystal orientation at an angle comprised between 30 degrees and 55 degrees relative to a normal to the top surface of the substrate.

Abstract: A detector of electromagnetic radiation (RL) is described. The detector comprises: a substrate (1), an oriented polycrystalline layer (2) of thermoelectric material deposited on the top surface (10) of the substrate, first and second electrodes spaced the one from the other and in electrical contact with the oriented polycrystalline layer. The substrate comprises at least one ceramic layer and the oriented polycrystalline layer has a crystal orientation at an angle comprised between 30 degrees and 55 degrees relative to a normal to the top surface of the substrate.

Abstract: An optical sensor for pressure measurements comprises a sensor head including: a diaphragm having a first surface in contact with a fluid of which the pressure has to be measured and a second surface opposite to the first surface, a body with a tubular cavity, means arranged inside the tubular cavity, associated with the second surface of the diaphragm and movable longitudinally inside said tubular cavity in response to deformation of the diaphragm, said means including a reflective surface, an end part of waveguide means arranged inside the tubular cavity and having the end surface faced to and not in contact with the reflective surface of said means, said waveguide means being connected to a light source and a receiver respectively to send to said means the light beam deriving from the light source and to collect at the receiver the light beam reflected from the reflective surface.

Abstract: Device for the detection of optical parameters consisting of a first sensing element that is sectioned into a plurality of equal regions each able to produce an electric signal, proportional to the power of the incident laser beam. Before said first sensing element with respect to the direction of the incident laser beam, at least a second sensing element is provided, lined up with the first sensing element and thermally insulated from it, that has a hole with a shape equal to the shape of the incoming laser beam and with dimensions increasing with the distance from that first element.

Abstract: Device for the characterization of a laser beam according to a "Knife edge" method as defined by Standard ISO 11146. The device has a lens for the focalization of an incident laser beam, and a detector. Interception elements are located between said lens and said detector in order to intercept sequentially the focalized laser beam in a plurality of different positions along its axis of propagation. The interception elements are suitable to allow, in each one of said positions, the passage of a progressively increasing (or decreasing) portion of the vocalized laser beam starting from a condition of substantially total (or null) interception up to a condition of substantially null (or total) interception.