In an infrared detector array according to the present invention, on a thin film with a periphery portion supported by a frame, three or more infrared detecting pixels are arranged in an array pattern so that the hot junctions of thermocouples are arranged above a concave portion and the cold junctions thereof are arranged above the frame. The first member may be attached to an outer container for holding the article. The waveguides residing on the movable platforms gradually change the direction of the optical signal in order to minimize losses. A mixing circuit that mixes the first correction value and the second correction value based on the ratio.