US-12625342-B2 - Imaging lens assembly, camera module and electronic device

Abstract

An imaging lens assembly includes a plurality of optical elements and a lens barrel. At least one optical element of the optical elements is a lens element. The lens element includes an optical effective portion, a peripheral portion, a light-blocking coating layer and a nanostructure layer. The light-blocking coating layer is disposed on at least one surface of the object-side peripheral surface and the image-side peripheral surface and includes a tapered portion. The tapered portion is tapered adjacent to a boundary between the optical effective portion and the peripheral portion. The nanostructure layer is disposed on the optical effective portion and the tapered portion of the light-blocking coating layer, and the nanostructure layer has a plurality of irregular ridge-shaped protrusions. The tapered portion of the light-blocking coating layer forms a light-passing opening adjacent to the boundary along a direction surrounding the optical axis.

Inventors

• Heng-Yi SU
• Ming-Ta Chou
• Wen-Yu Tsai
• Jyun-Jia CHENG

Assignees

• LARGAN PRECISION CO., LTD.

Dates

Publication Date

20260512

Application Date

20230302

Claims (20)

1. 1 . An imaging lens assembly, comprising: a plurality of optical elements, wherein an optical axis passes through the optical elements, and at least one optical element of the optical elements is a lens element; and a lens barrel accommodating the optical elements; wherein the lens element comprises: an optical effective portion, wherein the optical axis passes through the optical effective portion, which comprises: an object-side optical effective surface facing an object side of the imaging lens assembly; and an image-side optical effective surface facing an image side of the imaging lens assembly and disposed oppositely to the object-side optical effective surface; a peripheral portion surrounding the optical effective portion and comprising: an object-side peripheral surface facing the object side of the imaging lens assembly; an image-side peripheral surface facing the image side of the imaging lens assembly and disposed oppositely to the object-side peripheral surface; and an outer diameter surface connected to the object-side peripheral surface and the image-side peripheral surface; a light-blocking coating layer disposed on at least one surface of the object-side peripheral surface and the image-side peripheral surface and comprising: a tapered portion tapered toward a center of the optical effective portion, wherein the tapered portion is tapered adjacent to a boundary between the optical effective portion and the peripheral portion; a nanostructure layer disposed on the optical effective portion and the tapered portion of the light-blocking coating layer, wherein the nanostructure layer has a plurality of irregular ridge-shaped protrusions; and a connecting structure layer disposed between the nanostructure layer and the optical effective portion, and between the nanostructure layer and the peripheral portion; wherein a surface of the nanostructure layer has a plurality of hole structures, parts of the connecting structure layer are exposed from the hole structures to form exposed parts, and the exposed parts of the connecting structure layer are in contact with air; wherein the tapered portion of the light-blocking coating layer forms a light-passing opening adjacent to the boundary along a direction surrounding the optical axis, a roundness tolerance of the light-passing opening is t, and the following condition is satisfied: t<0.02 mm.
2. 2 . The imaging lens assembly of claim 1 , wherein each of the object-side optical effective surface and the image-side optical effective surface of the optical effective portion is a smooth surface, and the surface of the peripheral portion on which the light-blocking coating layer is disposed is a smooth surface.
3. 3 . The imaging lens assembly of claim 1 , wherein an average height of the nanostructure layer is between 90 nm and 350 nm.
4. 4 . The imaging lens assembly of claim 3 , wherein the average height of the nanostructure layer is between 125 nm and 300 nm.
5. 5 . The imaging lens assembly of claim 4 , wherein the average height of the nanostructure layer is between 195 nm and 255 nm.
6. 6 . The imaging lens assembly of claim 1 , wherein the roundness tolerance of the light-passing opening is t, and the following condition is satisfied: t<0.01 mm.
7. 7 . The imaging lens assembly of claim 6 , wherein the roundness tolerance of the light-passing opening is t, and the following condition is satisfied: t<0.005 mm.
8. 8 . The imaging lens assembly of claim 3 , wherein the light-blocking coating layer is further disposed on the outer diameter surface.
9. 9 . The imaging lens assembly of claim 8 , wherein the light-blocking coating layer is disposed on the object-side peripheral surface, the image-side peripheral surface and the outer diameter surface.
10. 10 . The imaging lens assembly of claim 8 , wherein the lens element further comprises: at least one axial connection structure configured for connecting to another optical element of the optical elements adjacent thereto, and for aligning the optical axis with the another optical element adjacent thereto.
11. 11 . The imaging lens assembly of claim 10 , wherein the light-blocking coating layer is extended from the outer diameter surface to the at least one axial connection structure.
12. 12 . A camera module, comprising: the imaging lens assembly of claim 1 .
13. 13 . An electronic device, comprising: the camera module of claim 12 , wherein the camera module further comprises an image sensor, which is disposed on an imaging surface of the camera module.
14. 14 . An imaging lens assembly, comprising: a plurality of optical elements, wherein an optical axis passes through the optical elements, and at least one optical element of the optical elements is a lens element; and a lens barrel accommodating the optical elements; wherein the lens element comprises: an optical effective portion, wherein the optical axis passes through the optical effective portion, which comprises: an object-side optical effective surface facing an object side of the imaging lens assembly; and an image-side optical effective surface facing an image side of the imaging lens assembly and disposed oppositely to the object-side optical effective surface; a peripheral portion surrounding the optical effective portion and comprising: an object-side peripheral surface facing the object side of the imaging lens assembly; an image-side peripheral surface facing the image side of the imaging lens assembly and disposed oppositely to the object-side peripheral surface; and an outer diameter surface connected to the object-side peripheral surface and the image-side peripheral surface; a light-blocking coating layer disposed on at least one surface of the object-side peripheral surface and the image-side peripheral surface and comprising: a tapered portion tapered toward a center of the optical effective portion, wherein the tapered portion is tapered adjacent to a boundary between the optical effective portion and the peripheral portion; a nanostructure layer disposed on the optical effective portion and the tapered portion of the light-blocking coating layer, wherein the nanostructure layer has a plurality of irregular ridge-shaped protrusions; at least one axial connection structure; and a connecting structure layer disposed between the nanostructure layer and the optical effective portion, and between the nanostructure layer and the peripheral portion; wherein a surface of the nanostructure layer has a plurality of hole structures, parts of the connecting structure layer are exposed from the hole structures to form exposed parts, and the exposed parts of the connecting structure layer are in contact with air; wherein the lens barrel comprises: an axial alignment structure connected to the at least one axial connection structure so as to cause the lens element to align the optical axis; wherein the tapered portion of the light-blocking coating layer forms a light-passing opening adjacent to the boundary along a direction surrounding the optical axis, a roundness tolerance of the light-passing opening is t, and the following condition is satisfied: t<0.02 mm.
15. 15 . The imaging lens assembly of claim 14 , wherein each of the object-side optical effective surface and the image-side optical effective surface of the optical effective portion is a smooth surface, and the surface of the peripheral portion on which the light-blocking coating layer is disposed is a smooth surface.
16. 16 . The imaging lens assembly of claim 14 , wherein an average height of the nanostructure layer is between 90 nm and 350 nm.
17. 17 . The imaging lens assembly of claim 16 , wherein the average height of the nanostructure layer is between 125 nm and 300 nm.
18. 18 . The imaging lens assembly of claim 17 , wherein the average height of the nanostructure layer is between 195 nm and 255 nm.
19. 19 . The imaging lens assembly of claim 14 , wherein the roundness tolerance of the light-passing opening is t, and the following condition is satisfied: t<0.01 mm.
20. 20 . The imaging lens assembly of claim 19 , wherein the roundness tolerance of the light-passing opening is t, and the following condition is satisfied: t<0.005 mm.

Description

RELATED APPLICATIONS This application claims priority to US Provisional Application Ser. No. 63/323,104, filed Mar. 24, 2022, which is herein incorporated by reference. BACKGROUND Technical Field The present disclosure relates to an imaging lens assembly, a camera module and an electronic device. More particularly, the present disclosure relates to a compact imaging lens assembly, a compact camera module and a portable electronic device. Description of Related Art In recent years, portable electronic devices have developed rapidly. For example, intelligent electronic devices and tablets have been filled in the lives of modern people, and camera modules mounted on the portable electronic devices have also prospered. However, as technology advances, the quality requirements of the electronic devices and the camera modules thereof are becoming higher and higher. Therefore, an imaging lens assembly, a camera module and an electronic device, which are simultaneously featured with compact sizes and the image quality, needs to be developed. SUMMARY According to one aspect of the present disclosure, an imaging lens assembly includes a plurality of optical elements and a lens barrel. An optical axis passes through the optical elements, and at least one optical element of the optical elements is a lens element. The lens barrel accommodates the optical elements. The lens element includes an optical effective portion, a peripheral portion, a light-blocking coating layer and a nanostructure layer. The optical axis passes through the optical effective portion, which includes an object-side optical effective surface and an image-side optical effective surface. The object-side optical effective surface faces an object side of the imaging lens assembly. The image-side optical effective surface faces an image side of the imaging lens assembly and is disposed oppositely to the object-side optical effective surface. The peripheral portion surrounds the optical effective portion and includes an object-side peripheral surface, an image-side peripheral surface and an outer diameter surface. The object-side peripheral surface faces the object side of the imaging lens assembly. The image-side peripheral surface faces the image side of the imaging lens assembly and is disposed oppositely to the object-side peripheral surface. The outer diameter surface is connected to the object-side peripheral surface and the image-side peripheral surface. The light-blocking coating layer is disposed on at least one surface of the object-side peripheral surface and the image-side peripheral surface and includes a tapered portion. The tapered portion is tapered toward a center of the optical effective portion, and the tapered portion is tapered adjacent to a boundary between the optical effective portion and the peripheral portion. The nanostructure layer is disposed on the optical effective portion and the tapered portion of the light-blocking coating layer, and the nanostructure layer has a plurality of irregular ridge-shaped protrusions. The tapered portion of the light-blocking coating layer forms a light-passing opening adjacent to the boundary along a direction surrounding the optical axis. When a roundness tolerance of the light-passing opening is t, the following condition is satisfied: t<0.02 mm. According to another aspect of the present disclosure, a camera module includes the imaging lens assembly according to the foregoing aspect. According to another aspect of the present disclosure, an electronic device includes the camera module according to the foregoing aspect, and the camera module further includes an image sensor, which is disposed on an imaging surface of the camera module. According to another aspect of the present disclosure, an imaging lens assembly includes a plurality of optical elements and a lens barrel. An optical axis passes through the optical elements, and at least one optical element of the optical elements is a lens element. The lens barrel accommodates the optical elements. The lens element includes an optical effective portion, a peripheral portion, a light-blocking coating layer, a nanostructure layer and at least one axial connection structure. The optical axis passes through the optical effective portion, which includes an object-side optical effective surface and an image-side optical effective surface. The object-side optical effective surface faces an object side of the imaging lens assembly. The image-side optical effective surface faces an image side of the imaging lens assembly and is disposed oppositely to the object-side optical effective surface. The peripheral portion surrounds the optical effective portion and includes an object-side peripheral surface, an image-side peripheral surface and an outer diameter surface. The object-side peripheral surface faces the object side of the imaging lens assembly. The image-side peripheral surface faces the image side of the imaging lens assembly and is disposed