| 摘要 |
PROBLEM TO BE SOLVED: To always provide stable picture quality by correcting the output of an infrared detector by transmitting thermal information from a thermal information supplier to the infrared detector when the temperature of an image pickup object is rapidly changed near any prescribed temperature. SOLUTION: When an airplane gets the earth in the view of an infrared image pickup device because of a noze drive, for example, a current in-view average temperature TR is rapidly increased. At such a time, at the infrared image pickup device, the current in-view average temperature TR is compared with a main in-view average temperature T0 up to the moment stored in a memory 11. In that case, since the condition of TR≫To is established, the rotary angle of an edge prism 6 is controlled by a wedge prism control part 9, and beams from a heat source 3A reflected by a reflecting mirror 5-1 are transmitted to an infrared detector 2. As a result, at the detector 2, stable image pickup information is always outputted even when the in-view temperature is rapidly changed by the takeoff and landing of the airplane or the like. Thus, this device is remarkably contributed for improving accuracy of image analysis, etc.
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