Imaging lens assembly, imaging lens assembly module, camera module and electronic device
An imaging lens assembly has an optical axis and includes at least one lens element. The at least one lens element includes an optical effective region and a peripheral portion. The peripheral portion includes an object-side surface, an image-side surface, a peripheral surface, an annular marking structure and at least one arc portion. The object-side surface faces towards an object side. The image-side surface faces towards an image side and corresponds to the object-side surface. The peripheral surface connects the object-side surface and the image-side surface. The annular marking structure is disposed on one of the object-side surface and the image-side surface, and the annular marking structure is an annular tip-ended protruding structure and surrounds the optical axis. The arc portion is disposed on the other one of the object-side surface and the image-side surface, and the arc portion is an annular protruding arc.
1. An imaging lens assembly, having an optical axis and comprising at least one lens element, and the lens element comprising:
an optical effective region, the optical axis passing through the optical effective region; and
a peripheral portion surrounding the optical effective region, and the peripheral portion comprising:
an object-side surface facing towards an object side;
an image-side surface facing towards an image side and corresponding to the object-side surface;
a peripheral surface connecting the object-side surface and the image-side surface;
an annular marking structure disposed on one of the object-side surface and the image-side surface, and the annular marking structure being an annular tip-ended protruding structure and surrounding the optical axis; and
at least one arc portion disposed on the other one of the object-side surface and the image-side surface, and the arc portion being an annular protruding arc;
wherein a perpendicular distance between the annular marking structure and the optical axis is dm, a perpendicular distance between the arc portion and the optical axis is da, a curvature radius of the arc portion is Ra, and the following conditions are satisfied:
0.82< da/dm< 1.18; and
0.025 mm≤ Ra≤ 0.5 mm.
2. The imaging lens assembly of claim 1 , wherein the lens element is formed by injection molding and further comprises at least one gate trace, and the gate trace is disposed on the peripheral surface.
3. The imaging lens assembly of claim 2 , wherein a distance from the annular marking structure to the gate trace along a direction perpendicular to the optical axis is t, and the following condition is satisfied:
t ≤0.4 mm.
4. The imaging lens assembly of claim 1 , wherein the curvature radius of the arc portion is Ra, and the following condition is satisfied:
0.035 mm≤ Ra≤ 0.45 mm.
5. The imaging lens assembly of claim 1 , wherein the perpendicular distance between the annular marking structure and the optical axis is dm, a maximum radius of the peripheral surface is ds, and the following condition is satisfied:
0.7< dm/ds< 1.0.
6. The imaging lens assembly of claim 1 , wherein the optical effective region comprises:
an object-side optical surface facing towards the object side; and
an image-side optical surface facing towards the image side, wherein at least one of the object-side optical surface and the image-side optical surface is an optical aspheric surface.
7. The imaging lens assembly of claim 1 , wherein a protruding height of the annular marking structure is h, and the following condition is satisfied:
0.0025 mm≤ h≤ 0.1 mm.
8. An imaging lens assembly module, comprising:
a lens barrel having a plurality of inner surfaces and forming an inner space; and
an imaging lens assembly disposed in the inner space of the lens barrel, the imaging lens assembly having an optical axis and comprising at least one lens element, and the lens element comprising:
an optical effective region, the optical axis passing through the optical effective region; and
a peripheral portion surrounding the optical effective region, and the peripheral portion comprising:
an object-side surface facing towards an object side;
an image-side surface facing towards an image side and corresponding to the object-side surface;
a peripheral surface connecting the object-side surface and the image-side surface, and physically contacting one of the inner surfaces of the lens barrel;
an annular marking structure only disposed on the image-side surface, and the annular marking structure being an annular tip-ended protruding structure and surrounding the optical axis; and
at least one arc portion disposed on the object-side surface, and the arc portion being an annular protruding arc;
wherein a perpendicular distance between the annular marking structure and the optical axis is dm, a perpendicular distance between the arc portion and the optical axis is da, a curvature radius of the arc portion is Ra, and the following conditions are satisfied:
0.75< da/dm< 1.25; and
0.025 mm≤ Ra≤ 0.5 mm.
9. The imaging lens assembly module of claim 8 , wherein the object-side surface of the lens element comprises an axial aligning structure for abutting against and aligning at center of an adjacent lens element.
10. The imaging lens assembly module of claim 8 , wherein the image-side surface of the lens element comprises an axial aligning structure for abutting against and aligning at center of an adjacent lens element.
11. The imaging lens assembly module of claim 8 , wherein the curvature radius of the arc portion is Ra, and the following condition is satisfied:
0.035 mm≤ Ra≤ 0.45 mm.
12. The imaging lens assembly module of claim 8 , wherein the perpendicular distance between the annular marking structure and the optical axis is dm, a maximum radius of the peripheral surface is ds, and the following condition is satisfied:
0.8< dm/ds< 1.0.
13. The imaging lens assembly module of claim 8 , wherein a length of a region which the peripheral surface contacts the one of the inner surfaces along a direction parallel to the optical axis is L, and the following condition is satisfied:
L< 0.1 mm.
14. The imaging lens assembly module of claim 8 , wherein the optical effective region comprises:
an object-side optical surface facing towards the object side; and
an image-side optical surface facing towards the image side, wherein at least one of the object-side optical surface and the image-side optical surface is an optical aspheric surface.
15. The imaging lens assembly module of claim 14 , wherein the perpendicular distance between the annular marking structure and the optical axis is dm, a maximum radius of the image-side optical surface is di, and the following condition is satisfied:
0.3< di/dm< 0.8.
16. The imaging lens assembly module of claim 8 , wherein a protruding height of the annular marking structure is h, and the following condition is satisfied:
0.0025 mm≤ h≤ 0.1 mm.
17. A camera module, comprising:
the imaging lens assembly module of claim 8 ; and
an image sensor disposed on an image surface of the imaging lens assembly module.
18. An electronic device, comprising:
the camera module of claim 17 .