light exists in the optical system of reflective infrared imaging seeker.Firstly,the light leakage and stray light of the seeker system is analyzed,and the design of shade of the seeker system is completed.The system shading ratio is 0.476.Then,the secondary reflection ghost image is analyzed,and it is found that the ghost image energy introduced by the front and rear surfaces of the first lens in the rear mirror group is stronger.It is proposed that the reflectivity of the lens surface must be increased to reduce the ghost image energy,and the absorption rate of the outer mirror tube should reach 0.9 to reduce the influence of the stray light scattered by the structural part on the imaging.Finally,the ray simulation tracking software ASAP is used for simulation,and the stray light coefficient of the system is 5.8%,which proves the feasibility of the design and ensures the imaging quality of the seeker optical system.