INFRARED SYSTEM WITH TWO FIELDS OF VIEW Russian patent published in 2022 - IPC G02B13/14 G02B15/167 G02B15/14 

FIELD: optical equipment.

SUBSTANCE: invention can be used in thermal imagers built on the basis of cooled matrix receivers of thermal radiation. The infrared system contains three components and a photodetector. The first fixed component contains the first positive convex-concave lens, the second surface of which is aspherical, and the second negative convex-concave lens. The second movable component contains the first negative convex-concave lens, the second surface of which is aspherical, and the second negative concave-convex lens, the first surface of which is aspherical. The third fixed component contains a biconvex lens, the second surface of which is aspherical, a negative concave-convex lens and a flat-convex lens, the second surface of which is aspherical. The lenses of the second component are installed with the ability to move along the optical axis independently of each other.

EFFECT: increase in the multiplicity of changes in the focal length.

1 cl, 3 dwg, 4 tbl