Abstract: A system for measurement of monochromatic attenuation for each wavelength of the spectrum, understood as such the attenuation at a wavelength of the spectrum with the spectral width provided by the measurement equipment, of the spectral attenuation in the spectral range of measurement, understood as such the set of monochromatic attenuations at all the wavelengths throughout the spectral range of measurement, and the total attenuation, understood as such the attenuation calculated by the integration of the spectral attenuation in the spectral range of measurement weighted with the solar spectrum.

Abstract: A characterization device, system, and method for characterizing reflective elements from the light beams reflected in it. The device has two variable-gain detectors on a common structure, which can be portable or fixed, and for capturing light beams reflected by a reflective element, and from at least one processor characterizing the quality of the reflected light beams and evaluating the quality of the reflective element from its reflective capacity. Each detector has a lens for increasing the signal-to-noise ratio of the reflected beam or beams, a light sensor on which the beam or beams captured by the lens are focused, an automatic gain selection system associated with the optical sensor, and a data communication device associated with the device itself. A characterization system and a characterization method for characterizing reflective elements from the quality of the light beams reflected in at least one reflective element or heliostat.

Abstract: The camera module has a lens assembly comprising a body and a heating element with an optically transparent coating applied to the body for heating it as electric current flows for removing water-based obstructions. The module includes a power supply for supplying electric current to the optically transparent coating through conductors, and a lens barrel (for receiving the body comprising a passageway for the conductors extending within the lens barrel towards the lens body. The method comprises applying to the lens body, high- and low-refractive index layers and an aluminium-doped zinc oxide layer.

Abstract: The present disclosure relates to a speckles detection system for detecting one or more speckles on a surface of an optical element of an image capturing device. The system comprises: one or more light sources configured to emit a light beam towards the optical element, the optical element being configured to reflect light from the light sources when speckles are located on the surface of the optical element. The system further comprises one or more light receivers configured to receive the light beam reflected by the optical elements such that speckles on the surface of the optical elements are detected. Methods for detecting one or more speckles on a surface of an optical element of an image capturing device are also provided.

Abstract: The present disclosure relates to a speckles detection system for detecting one or more speckles on a surface of an optical element of an image capturing device. The system comprises: one or more light sources configured to emit a light beam towards the optical element, the optical element being configured to reflect light from the light sources when speckles are located on the surface of the optical element. The system further comprises one or more light receivers configured to receive the light beam reflected by the optical elements such that speckles on the surface of the optical elements are detected. Methods for detecting one or more speckles on a surface of an optical element of an image capturing device are also provided.

Abstract: A characterization device, system, and method for characterizing reflective elements from the light beams reflected in it. The device has two variable-gain detectors on a common structure, which can be portable or fixed, and for capturing light beams reflected by a reflective element, and from at least one processor characterizing the quality of the reflected light beams and evaluating the quality of the reflective element from its reflective capacity. Each detector has a lens for increasing the signal-to-noise ratio of the reflected beam or beams, a light sensor on which the beam or beams captured by the lens are focused, an automatic gain selection system associated with the optical sensor, and a data communication device associated with the device itself. A characterization system and a characterization method for characterizing reflective elements from the quality of the light beams reflected in at least one reflective element or heliostat.

Abstract: A system for measurement of monochromatic attenuation for each wavelength of the spectrum, understood as such the attenuation at a wavelength of the spectrum with the spectral width provided by the measurement equipment, of the spectral attenuation in the spectral range of measurement, understood as such the set of monochromatic attenuations at all the wavelengths throughout the spectral range of measurement, and the total attenuation, understood as such the attenuation calculated by the integration of the spectral attenuation in the spectral range of measurement weighted with the solar spectrum.

Abstract: The present disclosure relates to a speckles detection system for detecting one or more speckles on a surface of an optical element of an image capturing device. The system comprises: one or more light sources configured to emit a light beam towards the optical element, the optical element being configured to reflect light from the light sources when speckles are located on the surface of the optical element. The system further comprises one or more light receivers configured to receive the light beam reflected by the optical elements such that speckles on the surface of the optical elements are detected. Methods for detecting one or more speckles on a surface of an optical element of an image capturing device are also provided.

Abstract: Spectrophotometer for the characterization of receivers of solar collectors in order to determine optical properties (transmittance and reflectance). The equipment allows the evaluation of a receiver tube in real time and in any kind of light conditions, both inside and outside. The equipment also allows the detection of the eccentricity between the outer tube and the inner tube, which directly influences the reliability of the measurement. The equipment has a mechanical system for allowing a rotation of the equipment around the tube in order to find the optimum measurement position and attach itself to the tube.

Abstract: Selective solar absorbent coating and manufacturing method, with solar absorption and low emissivity properties. The coating comprises a substrate (1) of metal, dielectric or ceramic material, at least one highly reflective metal layer (2) in mid-far infrared applied to the substrate itself which provides low emissivity properties, a mufti-layer structure of alternating dielectric and metallic layers (3) of subnanometric thickness applied to the reflective metal layer and at least one dielectric layer (4) that acts as an anti-reflective layer for the solar spectrum. The coating is applicable as a selective absorbent coating in absorbent tubes for parabolic-trough solar collectors, in solar panels for hot water, heating or domestic cooling, both in the form of absorbent tubes and absorbent sheets, in capture systems in tower solar thermoelectric power plants, and in capture systems in Stirling disk systems.

Abstract: A domestic appliance apparatus includes at least one light-guiding element, and at least one sensor unit having at least one light sensor and configured to detect light transmitted through the light-guiding element and to determine at least one temperature characteristic. The at least one sensor unit has at least one sensor element configured to determine at least one characteristic of the at least one light-guiding element.

Abstract: The invention relates to a portable reflectometer and to a method for characterizing the collector mirrors used in solar power plants for the in-field characterization of reflection coefficients. The equipment includes all of the components required for this measurement, such as a module to measure the reflection coefficient of the mirror, an electronic data acquisition and processing system, a system for processing data and controlling the equipment, a system for storing the data of interest, a user interface system, and a system allowing communication between the aforementioned systems and an outer casing. The equipment can be used to characterize the specular reflection coefficient of flat or curved mirrors of different thicknesses, without requiring adjustments to be made to the equipment, minimizing the influence of diffuse reflection on the measurement.

Abstract: Selective solar absorbent coating and manufacturing method, with solar absorption and low emissivity properties. The coating comprises a substrate (1) of metal, dielectric or ceramic material, at least one highly reflective metal layer (2) in mid-far infrared applied to the substrate itself which provides low emissivity properties, a multi-layer structure of alternating dielectric and metallic layers (3) of subnanometric thickness applied to the reflective metal layer and at least one dielectric layer (4) that acts as an anti-reflective layer for the solar spectrum. The coating is applicable as a selective absorbent coating in absorbent tubes for parabolic-trough solar collectors, in solar panels for hot water, heating or domestic cooling, both in the form of absorbent tubes and absorbent sheets, in capture systems in tower solar thermoelectric power plants, and in capture systems in Stirling disk systems.

Abstract: Spectrophotometer for the characterisation of receivers of solar collectors in order to determine optical properties (transmittance and reflectance). The equipment allows the evaluation of a receiver tube in real time and in any kind of light conditions, both inside and outside. The equipment also allows the detection of the eccentricity between the outer tube and the inner tube, which directly influences the reliability of the measurement. The equipment has a mechanical system for allowing a rotation of the equipment around the tube in order to find the optimum measurement position and attach itself to the tube.

Abstract: Selective solar absorbent coating and manufacturing method, with solar absorption and low emissivity properties. The coating comprises a substrate (1) of metal, dielectric or ceramic material, at least one highly reflective metal layer (2) in mid-far infrared applied to the substrate itself which provides low emissivity properties, a multi-layer structure of alternating dielectric and metallic layers (3) of subnanometric thickness applied to the reflective metal layer and at least one dielectric layer (4) that acts as an anti-reflective layer for the solar spectrum. The coating is applicable as a selective absorbent coating in absorbent tubes for parabolic-trough solar collectors, in solar panels for hot water, heating or domestic cooling, both in the form of absorbent tubes and absorbent sheets, in capture systems in tower solar thermoelectric power plants, and in capture systems in Stirling disk systems.

Abstract: Selective solar absorbent coating and manufacturing method, with solar absorption and low emissivity properties. The coating comprises a substrate (1) of metal, dielectric or ceramic material, at least one highly reflective metal layer (2) in mid-far infrared applied to the substrate itself which provides low emissivity properties, a mufti-layer structure of alternating dielectric and metallic layers (3) of subnanometric thickness applied to the reflective metal layer and at least one dielectric layer (4) that acts as an anti-reflective layer for the solar spectrum. The coating is applicable as a selective absorbent coating in absorbent tubes for parabolic-trough solar collectors, in solar panels for hot water, heating or domestic cooling, both in the form of absorbent tubes and absorbent sheets, in capture systems in tower solar thermoelectric power plants, and in capture systems in Stirling disk systems.

Abstract: A domestic appliance apparatus includes at least one light-guiding element, and at least one sensor unit having at least one light sensor and configured to detect light transmitted through the light-guiding element and to determine at least one temperature characteristic. The at least one sensor unit has at least one sensor element configured to determine at least one characteristic of the at least one light-guiding element.

Abstract: The present invention relates to a system and method for measuring a wavelength-resolved state of polarization, for calculating differential group delay of an optical signal under analysis (1) by means of taking multiple measurements of the spectrum of the signal under analysis (1) with spectral filtering means (3) with an optical output the power of which depends on the polarization of the input. The polarization at the input of the spectral filtering means (3) is modified by means of a polarization transformer (2) which sequentially selects a plurality of output states of polarization. The spectral filtering means (3) can comprise a filter based on stimulated Brillouin scattering amplification (10) simultaneously combining wavelength discrimination and polarization discrimination.

Abstract: Portable spectrophotometer and method for characterizing solar collector tubes for simultaneously and on-field characterizing reflection and transmission coefficients. This device includes all the components needed to take this measurement, such as a module that takes the measurement of the reflection coefficient (R) of the inner tube (1?), a module that takes the measurement of transmission coefficient (T) of the outer tube (1?), an electronic data acquisition and processing system (12), an external computer (13) for controlling the device and sending the measured data (17) and a communication system (15) between device and the computer (13).

Abstract: The present invention relates to a system and method for measuring a wavelength-resolved state of polarization, for calculating differential group delay of an optical signal under analysis (1) by means of taking multiple measurements of the spectrum of the signal under analysis (1) with spectral filtering means (3) with an optical output the power of which depends on the polarization of the input. The polarization at the input of the spectral filtering means (3) is modified by means of a polarization transformer (2) which sequentially selects a plurality of output states of polarization. The spectral filtering means (3) can comprise a filter based on stimulated Brillouin scattering amplification (10) simultaneously combining wavelength discrimination and polarization discrimination.