The utility model discloses a reflecting film and a
windshield, and relates to the technical field of optical projection, and the reflecting film comprises a low-refractive-index
dielectric layer and a high-refractive-index
dielectric layer which are stacked in sequence; wherein the low-refractive-index
dielectric layer is a
silicon dioxide film layer with a porous structure, the
refractive index of the low-refractive-index
dielectric layer is inversely proportional to the
porosity of the low-refractive-index
dielectric layer, and the
porosity refers to the proportion of the volume of pores in the film layer in the volume of the film layer. The
silicon dioxide film layer of the porous structure is used as the low-refractive-index medium layer, the
refractive index difference value of all media in the reflecting film can be increased by reducing the
refractive index of the low-refractive-index medium, the film
system of the reflecting film is simpler, the thickness and the preparation process of the reflecting film are easier to control, and the application range is wider. The
windshield using the reflecting film has a better reflecting effect on P polarized light, so that the
image display effect of a head-up display
system is improved.