Abstract: A radiation sensor (10) comprises plural radiation sensing elements (1) arranged along an arrangement line, a lens having an optical axis focusing radiation towards the sensing elements, and circuitry (2) receiving the electric signal of the sensing elements and providing an output signal. The midpoint of the arrangement line may be offset against the optical axis of the converging section (5). At least some of the sensing elements may have different sizes. At least some of the sensing elements may have different relative sensitivity compared to each other. Two or more pairs of adjacent sensing elements may have a different pitch.

Abstract: A sensor for detecting electromagnetic radiation comprises a sensor element, a housing in which the sensor element is disposed, and a radiation inlet window provided in the housing and closed by a material transmissible for the radiation to be detected. The transmissible material is fixed to the housing by fixation means not disposed in the field of view of the sensor element.

Abstract: A sensor element for detecting electromagnetic radiation, particularly in the infrared range, comprises one or more heat-sensitive portions provided on a substrate and one or more influencing layers for influencing the absorption and/or reflection of the electromagnetic radiation to be detected. The heat-sensitive portion(s) and/or the influencing layers are arranged on the substrate in accordance with the thermal properties of the influencing layers, preferably asymmetrically.

Abstract: A sensor cap assembly includes a radiation shielding part provided with a radiation entrance opening, and a radiation-transmissive lens mounted from the outside to the shielding part. The lens is a thick lens with a ratio T/D of thickness (T) to diameter (D) of more than 0.10, preferably more than 0.15.

Abstract: A sensor (30) for detecting electromagnetic radiation comprises a sensor element (10), a housing (31, 33) in which the sensor element is disposed, and a radiation inlet window (35) provided in the housing and closed by a material (32) transmissible for the radiation to be detected. The transmissible material (32) is fixed to the housing by fixation means (38) not disposed in the field of view of the sensor element.

Abstract: A sensor element (10) for detecting electromagnetic radiation, particularly in the infrared range, comprises one or more heat-sensitive portions (4a, 4b) provided on a substrate (1-3) and one or more influencing layers (5a, 5b) for influencing the absorption and/or reflection of the electromagnetic radiation to be detected. The heat-sensitive portion(s) and/or the influencing layers are arranged on the substrate in accordance with the thermal properties of the influencing layers, preferably asymmetrically.