Patent ID: 8379091

Claim:
An infrared camera for observing a scene, including an optical zoom having a focusing area in the scene and including: an array detector ( 5 ) including a cooled screen ( 50 ), an array ( 51 ) capable of detecting infrared radiation; a module ( 123 ) for modifying the focal distance of the camera, the modifier module being capable of varying the focal distance of the camera in order to ensure the optical zoom function of the camera; and an imager module (L 4 ) capable of ensuring, for all the focal distance values of the camera: focusing of the infrared radiation on the array ( 51 ) of the detector ( 5 ), on the one hand, and conjugation of the pupil of the camera on the cooled screen ( 50 ) of the detector, on the other hand, said camera characterized in that the modifier module ( 123 ) forms an intermediate image at infinity, from an object plane located in the focusing area in the scene.