| 摘要 |
An infrared (IR) imaging system is presented. The system comprises a cooling chamber associated with a cooler generating a certain temperature condition inside the chamber. The cooling chamber has an optical window, and comprises thereinside an IR detector and a cold shield both thermally coupled to said cooler, and an imaging optical assembly comprising one or more imaging lenses defining a certain fixed focus of the imaging assembly and being enclosed by the cold shield in between the detector and the optical window. The imaging optical assembly and the detector are therefore under the same cooling temperature thereby reducing thermal noise in the detected image.
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