| 摘要 |
FIELD: physics. ^ SUBSTANCE: optical system for thermal imaging devices has optical components which construct an intermediate image and transfer the intermediate image into the image plane formed in the plane of light-sensitive elements of a photodetector array. The system is fitted with a defocusing element which is not fixed and allows to shift the image plane into a cold aperture plane or a plane lying between the cold aperture plane and the plane of the photosensitive elements of the photodetector array. The defocusing element can move in and out of the optical channel. ^ EFFECT: compensation for non-uniformity of the constant component of the signal from the photosensitive elements of the photodetector array of the thermal imaging device. ^ 5 cl, 3 dwg |
