| 摘要 |
PROBLEM TO BE SOLVED: To provide an infrared imaging device capable of correcting sensitivity in an operation time without interrupting imaging of an imaging target. SOLUTION: An imaging signal from a detector 4 when imaging after switching off a heater built in an infrared lens 1 with the heater by a heater controller 2 is accumulated beforehand into a memory A5 by a signal processing circuit 7 as sensitivity correction data during a low temperature time. Then, the heater is switched on by the heater controller 2, and an imaging signal from the detector 4 when imaging in the state where the temperature of the infrared lens 1 with the heater is raised up to a reference temperature during a high temperature time is accumulated beforehand into a memory B6 by the signal processing circuit 7 as sensitivity correction data during the high temperature time. During an ordinary imaging time, sensitivity correction of an imaging signal from the detector 4 wherein an optional target is photographed is applied to the signal processing circuit 7 based on two sensitivity correction data during the low temperature time and during the high temperature time stored respectively in the memories A5, B6. This device also includes a temperature sensor 3 for monitoring the temperature of the infrared lens 1 with the heater. COPYRIGHT: (C)2008,JPO&INPIT
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