- An infrared sensor assembly for sensing infrared radiation from an object, the infrared sensor assembly comprising: - a sensor array comprising a plurality of sensing elements, wherein the sensor array comprises: o at least two infrared sensing elements , each infrared sensing element having a radiation responsive element providing a proportionate electrical signal in response to infrared radiation incident thereto; o at least two blind sensing elements , at least one blind sensing element being interspersed among the at least two infrared sensing elements , each blind sensing element being shielded from incident infrared radiation of the object and providing a proportionate electrical signal in response to parasitic thermal fluxes, o a processor for processing electrical signals of the at least two infrared sensing elements and the at least two blind sensing elements characterized in that the processor is adapted to provide an output of the sensor array being a subtractive function corresponding to the difference between a sum of the signals of the plurality of infrared sensing elements and a sum of the signals of the plurality of blind sensing elements such that at least linear and/or non-linear parasitic thermal fluxes are at least partly compensated for. - a sensor array comprising a plurality of sensing elements, wherein the sensor array comprises: o at least two infrared sensing elements , each infrared sensing element having a radiation responsive element providing a proportionate electrical signal in response to infrared radiation incident thereto; o at least two blind sensing elements , at least one blind sensing element being interspersed among the at least two infrared sensing elements , each blind sensing element being shielded from incident infrared radiation of the object and providing a proportionate electrical signal in response to parasitic thermal fluxes, o a processor for processing electrical signals of the at least two infrared sensing elements and the at least two blind sensing elements characterized in that the processor is adapted to provide an output of the sensor array being a subtractive function corresponding to the difference between a sum of the signals of the plurality of infrared sensing elements and a sum of the signals of the plurality of blind sensing elements such that at least linear and/or non-linear parasitic thermal fluxes are at least partly compensated for. o at least two infrared sensing elements , each infrared sensing element having a radiation responsive element providing a proportionate electrical signal in response to infrared radiation incident thereto; o at least two blind sensing elements , at least one blind sensing element being interspersed among the at least two infrared sensing elements , each blind sensing element being shielded from incident infrared radiation of the object and providing a proportionate electrical signal in response to parasitic thermal fluxes, o a processor for processing electrical signals of the at least two infrared sensing elements and the at least two blind sensing elements characterized in that the processor is adapted to provide an output of the sensor array being a subtractive function corresponding to the difference between a sum of the signals of the plurality of infrared sensing elements and a sum of the signals of the plurality of blind sensing elements such that at least linear and/or non-linear parasitic thermal fluxes are at least partly compensated for. <EOS>