Infrared imaging device, aperture control method, and a diaphragm control program

Infrared imaging apparatus, the corresponding to the incident infrared rays and the image pickup element including a plurality of infrared detection pixels, a stop, a temperature detector for detecting the temperature of the diaphragm, being emitted from the aperture in the infrared detection pixel of the imaging device main memory and the first signal value, imaging obtained by imaging a subject by an imaging device to stop F value while any values ​​stored in association with the F value and the temperature of the diaphragm a first signal value image comprising data, the temperature of the diaphragm detected by the temperature detection unit, and a system control unit for controlling the F value of the diaphragm based on the arbitrary value.