Abstract:
A calibration system (300) for a detector (328) includes a base member (302), a plurality of radiation sources (304)fixedly attached to the base member, and a positioning mechanism (306) attached to the base member. Each radiation source (394) is maintained at a different temperature and is configured to emit electromagnetic radiation. The positioning mechanism includes a movable member (308) having a single degree of freedom with respect to the base member (302), and a plurality of optical elements arranged (310) on the movable member. Each optical element corresponds (310) to one of the radiation sources (304) and each optical element is configured to at least be movable between a calibration position and a non-calibration position. When the optical element is in the calibration position, the optical element is configured to receive the electromagnetic radiation from its corresponding radiation source and to reflect the electromagnetic radiation to a detector.
Abstract:
A light measurement method is provided comprising: determining one or more correction factors for at least one image capture device, using the image capture device to receive light output from at least one source of illumination, obtaining an output from the image capture device which corresponds to the light output of the source of illumination, and applying the or each correction factor to the output of the image capture device to obtain one or more substantially absolute measure of the light output of the source of illumination. A light measurement apparatus is also provided to carry out the light measurement method.
Abstract:
A receiver for a radiated electromagnetic signal includes elements 26, 22 that respectively transmit a high percentage and a low percentage of the incident signal, in combination with a detector 24. The device is adapted for mounting on or near a horizontal surface, such as a ceiling. The signal is preferably in the infrared region of the spectrum. The receiver provides non-electronic gain control and, when the high-transmission element 26 passes the signal wavelength preferentially over the other wavelengths, it also provides improved noise immunity.
Abstract:
The invention provides for a method of determine a physical property of a biological sample. The method comprises the steps of: acquiring (100) a set of preliminary calibration signals (306) of a first lot (208') of a reagent using an automatic analyzer (202) with a first photometry module (210); acquiring (102) a reference set of signals (310) of the first lot of the reagent using a calibration analyzer (302) with a second photometry module (210'); determining (104) a set of module specific components (224) by subtracting the reference set of signals from the preliminary calibration signals; acquiring (106) a lot specific set of signals (226) of a second lot of the reagent using the second photometry module; determining (108) a lot calibration (228) for the first photometry module using the set of module specific components and the lot specific set of signals; and acquiring (110) a measurement signal (230) of the biological sample using the first photometry module and the second lot of the reagent; and determining (112) a physical property (232) of the biological sample using the measurement signal (230) and the lot calibration (228).
Abstract:
A method, apparatus, and a computer program is provided. The method comprises: determining an ambient light value from ambient light data provided by at least one ambient light sensor, in dependence upon the spectral distribution of the ambient light data provided by the at least one ambient light sensor and a manufacturer of the at least one ambient light sensor.
Abstract:
Aparato receptor láser basado en fotodiodo de avalancha termorregulado con control embebido, para la recepción de haces láser modulados en formato binario, con un fotodiodo de avalancha (2) que se encuentra sometido a tres lazos de control regulados por un microcontrolador (48): un lazo de control térmico encargado de mantener estable la temperatura del fotodiodo de avalancha (2); un lazo de control de sensibilidad del fotodiodo encargado de mantener estable la fotosensibilidad del fotodiodo de avalancha (2); un lazo de control de ganancia RMS encargado de controlar la ganancia y mantener la estabilidad de la señal proveniente del fotodiodo de avalancha (2). Aplicable para comunicaciones ópticas por láser.