The optical system

with high image quality and low distortion can ensure the high mapping precision. The quality of the optical system can be reduced by the effect of stray light. The effect of the stray light is analyzed according as the result of the optical design and the restraining method is putted forward to reduce stray light. The image of three line array mapping camera with stray light is analyzed by using the software LightTools and ZEMAX

the theoretical result of stray light coefficients is less than 5%. The stray light coefficients of each system are tested

and the largest stray light coefficient is less than 6%. The simulated image of optical system with tested result shows the correction of image analyzing with stray light and the feasibility of the stray light restraining methods.