Medium-wave infrared turntable optical lens

The utility model discloses a medium wave infrared turntable optical lens in the technical field of optical lenses, which comprises an optical lens, one end of the optical lens is provided with a mounting groove A, and the upper part and the lower part of the outer wall of the optical lens are respectively provided with a mounting groove B. The medium wave infrared turntable optical lens is reasonable in structure. The heating ring is mounted in front of the optical lens in the optical lens, so that when fog appears on the internal optical lens in the use process of the optical lens, the optical lens can be heated and demisted by the heating ring, and the situation that the definition of the optical lens is influenced by the fog is avoided as much as possible; when the protective sleeve is installed on the optical lens, the protective sleeve can be dismounted by inserting the plug pin into the slot on the protective sleeve, the dismounting structure is simple, and the internal optical lens can be conveniently