Gravity center locating energy detection optical system with long life

The invention discloses a gravity center locating energy detection optical system with long service life, used for solving the problem that the traditional optical system is difficult to work stably and precisely for a long time in a severe electromagnetic environment. The optical system comprises a first positive lens, a second positive lens, a first negative lens, a diaphragm, a third positive lens, a fourth positive lens and a second negative lens which are sequentially arranged on the same optical path along an incident light direction, wherein all the six lenses are radiation resistant lenses which are made from fused silica material; and focal lengths, curvature radiuses and refractive indexes of the six lenses are designed and determined. The invention is particularly and suitably applied to long-life satellites with different space tracks, can woke for more than 10 years, and even for 25 years, is beneficial to correction of system aberration and has less defocused spots and color bias, favorable adap