Imaging optical lens, image capturing device and electronic device

The invention provides an imaging optical lens, an image capturing device and an electronic device, the imaging optical lens comprises at least one optical lens, the optical lens comprises an anti-reflection film, the anti-reflection film comprises a high and low refractive index film and a gradient refractive index film, and the high and low refractive index film is configured between the optical lens and the gradient refractive index film. The high and low refractive index film comprises at least one high refractive index film layer and at least one low refractive index film layer, and the high refractive index film layers and the low refractive index film layers are alternately stacked. The graded index film comprises a plurality of holes, and the holes far away from the optical lens are relatively larger than the holes close to the optical lens. The uniform and compact anti-reflection film is plated on the surface of the imaging optical lens, so that the optical lens has remarkable oxidation resistance, t