Magnification feedback lens based on capacitive gate device

The utility model discloses a magnification feedback lens based on a capacitive gate device. Including an outer cylinder, an eyepiece assembly is fixed at the upper end of the outer cylinder; an objective lens assembly is fixed at the lower end of the outer cylinder; the ocular lens assembly and the objective lens assembly are fixedly connected through an inner lens cone. Wherein the inner lens cone is movably connected with a zoom linkage assembly, the zoom linkage assembly comprises a rotating assembly which is rotatably arranged outside the inner lens cone in a sleeving manner, a capacitivegate device is arranged at the upper end of the rotating assembly, and the capacitive gate device feeds back and outputs the multiplying power of the zoom linkage assembly in a capacitive gate displacement manner. The multiplying power feedback lens converts multiplying power into a capacitive gate displacement signal through the capacitive gate device and feeds back and outputs the capacitive gate displacement signal, t