Based on the experimental research on the electro-optical imaging system induced by intense light, the various rules of the parameters such as saturated pixels, the intensity of incidence, the parameters of the optical system and the saturated threshold of pixels are obtained. And the point spread function (PSF) of the optical system is used to verify theoretically. The result shows that saturated pixels have been made by diffraction effect. The relationships between saturated pixels and the intensity of incidence, wavelength, the parameters of the optical system, the saturated threshold of pixels are derived.