Imaging lens, camera module and electronic device

The invention provides an imaging lens, a camera module and an electronic device. The imaging lens comprises a plurality of optical elements and a lens barrel. The optical axis passes through the optical elements, and at least one of the optical elements is a lens. The lens barrel accommodates the optical element. The lens includes an optical effective portion, a peripheral portion, a light shielding coating, and a nanostructure layer. The light-shielding coating is disposed on at least one of the object-side outer peripheral surface and the image-side outer peripheral surface and includes a tapered portion that tapers toward the center of the optical effective portion, and the tapered portion tapers near the junction of the optical effective portion and the outer peripheral portion. The nanostructure layer is disposed on the optical effective portion and the tapered portion of the shading coating, and the nanostructure layer has a plurality of irregular ridge-shaped protrusions. And a light through hole is f