Imaging lens set with plastic lens element, imaging lens module and electronic device

An imaging lens set comprising a plurality of optical elements, wherein at least two of the optical elements are lens elements, one of the at least two lens elements is a plastic lens element, the plastic lens element having a central axis comprises an object-side surface and an image-side surface, the image-side surface is located opposite to the object-side surface, and in order from the central axis to an edge of the plastic lens element, each of the object-side surface and the image-side surface comprises:

• an effective optical section for being passed through by an imaging light;
• and
• a lens peripheral section surrounding the effective optical section;
• wherein at least one of the lens peripheral section of the object-side surface and the lens peripheral section of the image-side surface comprises at least one annular groove structure, the annular groove structure comprises a plurality of stepped surfaces, a light absorbing coating portion is disposed on at least part of one of the stepped surfaces, and the annular groove structure is not in contact with any optical element other than the plastic lens element;
• wherein the plastic lens element and another one of the lens elements which is adjacent to the plastic lens element are arranged along the central axis, each of the plastic lens element and the another one of the lens elements comprises an axial connecting structure for being assembled with each other and aligned with the central axis, each of the axial connecting structures comprises a receiving surface and a conical surface, and a normal direction of each of the receiving surfaces is parallel to the central axis;
• wherein a number of the stepped surfaces of the annular groove structure is at least three.