Plastic lens element, optical imaging module and electronic device

A plastic lens element, having a section passing through an optical axis, and the plastic lens element comprising:

• an optical effective region, the optical axis passing through the optical effective region;
• and
• a peripheral region circularly disposed on a periphery of the optical effective region, and the peripheral region having an outer diameter surface and an annular lateral surface, wherein the outer diameter surface is farther away from the optical effective region than the annular lateral surface from the optical effective region, the annular lateral surface is located between the outer diameter surface and the optical effective region, and the peripheral region comprises:
• a protrusive structure disposed on the outer diameter surface and adjacent to the annular lateral surface, and the protrusive structure extending towards a direction away from the optical axis;
• an indented shape dented from the outer diameter surface towards the optical effective region, and the indented shape having a base surface;
• and
• a release notch dented from the base surface towards the optical axis, and the release notch having a top surface and a bottom surface via the section, wherein the top surface and the bottom surface are arranged along an extending direction of the optical axis, a conical surface is located between the top surface and the bottom surface, the conical surface is tapered from the top surface towards the optical axis in a direction towards the bottom surface, and the top surface, the conical surface, the bottom surface and the protrusive structure are arranged in order along a direction parallel to the optical axis.

A plastic lens element, having a section passing through an optical axis, and the plastic lens element comprising:

• an optical effective region, the optical axis passing through the optical effective region;
• and
• a peripheral region circularly disposed on a periphery of the optical effective region, and the peripheral region having an outer diameter surface and an annular lateral surface, wherein the outer diameter surface is farther away from the optical effective region than the annular lateral surface from the optical effective region, the annular lateral surface is located between the outer diameter surface and the optical effective region, and the peripheral region comprises:
• an indented shape dented from the outer diameter surface towards the optical effective region, and the indented shape having a base surface;
• a release notch dented from the base surface towards the optical axis, and the release notch having a top surface and a bottom surface via the section, wherein the top surface and the bottom surface are arranged along an extending direction of the optical axis, a conical surface is located between the top surface and the bottom surface, and the conical surface is tapered from the top surface towards the optical axis in a direction towards the bottom surface;
• and
• an air gap formed on the indented shape via the conical surface and the bottom surface, so that an overlap between the air gap and the indented shape being in extending directions parallel to the optical axis towards both an object side and an image side.