ZOOM LENS Russian patent published in 2022 - IPC G02B15/14 

FIELD: optical elements.

SUBSTANCE: lens includes four groups of optical elements, an aperture diaphragm and an image sensor. All optical elements consist of 200 series radiation-resistant glass. When the lens focal length changes, the position of the optical sensor is fixed, and the first, third and fourth groups of optical elements are made with the possibility of non-linear movement along the optical axis. When changing the focal length, the distance between the aperture stop and the third group is fixed. The fourth group is made with the possibility of non-linear movement along the optical axis of the lens in the direction from the image sensor for mechanical compensation of the image plane shift.

EFFECT: reduction in size, increase in the angle of the field of view, as well as the ability to work under conditions of exposure to gamma radiation with a power of up to 5х10⁶ R/h.

3 cl, 5 dwg