OPTICAL SYSTEM OF THERMAL IMAGING DEVICE WITH TWO FIELDS OF VIEW Russian patent published in 2018 - IPC G02B13/14 G02B15/02 

FIELD: optics; instrument engineering.

SUBSTANCE: optical system of thermal imaging device with two fields of view consists of the first component located along the optical axis, containing the first negative and a second positive convex-concave lens and a third negative concave-convex lens arranged to move along the optical axis, a second component arranged for input / output to the optical path and comprising a first negative and a second positive concave-convex lens and a third positive convex-concave lens, a third component comprising a first positive and a second negative concave-convex lens, a third convex-concave and a fourth concave-convex positive lens, and a photodetector device. Fourth component is installed with the possibility of input-output to the optical path in the space between the first and third components and containing two positive lenses.

EFFECT: increase the probability of detection and recognition of objects by equalizing the inhomogeneity of the sensitive elements and compensating for the thermal defocusing of the image in two fields of vision while maintaining compactness.

1 cl, 3 dwg, 4 tbl