Abstract: Based on the paraxial invisibility condition of multiple lens system, the invisibility distances of four-lens system and five-lens system are calculated by using the image intersection method, and the lens system experiment is built according to the calculation results. The invisibility range is measured and discussed to verify the calculation results. Finally, COMSOL is used to simulate the geometric optical path of multiple lens system in parallel light, and the invisibility range between different lenses is further discussed. The results are in good agreement with the experimental measurements and theoretical calculations.

Key words: geometrical optics, paraxial approximation, optical invisibility, multi-lens system