CN-116047725-B - Imaging lens group, imaging lens module, camera module and electronic device

Abstract

An imaging lens group, an imaging lens module, a camera module and an electronic device are provided, wherein the imaging lens group comprises a lens element. The lens element has an optical axis and includes an optically effective region and an outer peripheral portion. The optical axis passes through the optical effective area, and the periphery surrounds the optical effective area. The outer peripheral portion includes an object side surface, an image side surface, an outer peripheral surface, an annular marking structure, and an arc portion. The object side faces the object side, the image side faces the image side, and the image side corresponds to the object side. The outer peripheral surface connects the object side surface and the image side surface. The annular mark structure is arranged on one of the object side surface and the image side surface, and the annular mark structure is an annular tip protruding structure and surrounds the optical axis. The arc part is arranged on the other one of the object side surface and the image side surface, and the arc part is an annular convex arc. By arranging the annular mark structure on one surface of the lens element and arranging the arc part on the other surface, the size precision and the release yield of the lens element can be improved.

Inventors

• ZHANG MINGSHUN
• ZHANG LINAN
• ZHOU MINGDA
• CAI ZHUNHUA

Assignees

• 大立光电股份有限公司

Dates

Publication Date

20260508

Application Date

20220113

Priority Date

20211028

Claims (18)

1. 1. An imaging lens assembly having an optical axis comprising at least one lens element, the lens element comprising: an optically effective area through which the optical axis passes, and An outer peripheral portion surrounding the optically effective area, the outer peripheral portion comprising: an object side facing the object side; an image side face facing an image side and corresponding to the object side face; An outer peripheral surface connecting the object side surface and the image side surface; An annular mark structure disposed on one of the object side surface and the image side surface and having an annular tip protruding structure surrounding the optical axis, and At least one arc part arranged on the other one of the object side surface and the image side surface and being an annular convex arc; Wherein, the vertical distance between the annular mark structure and the optical axis is dm, the vertical distance between the arc part and the optical axis is da, the curvature radius of the arc part is Ra, which satisfies the following conditions: 0.82< da/dm <1.18, and 0.025mm≤Ra≤0.5mm。
2. 2. The imaging lens assembly of claim 1, wherein said lens element is injection molded and further comprises at least one molding mark disposed on said outer peripheral surface.
3. 3. The imaging lens assembly of claim 2, wherein a distance t from the annular mark structure to the scribe line in a direction perpendicular to the optical axis satisfies the following condition: t≤0.4mm。
4. 4. The imaging lens group according to claim 1, wherein the radius of curvature of the circular arc portion is Ra, which satisfies the following condition: 0.035mm≤Ra≤0.45mm。
5. 5. the imaging lens assembly of claim 1, wherein a perpendicular distance dm between said annular mark structure and said optical axis, and a maximum radius ds of said outer peripheral surface satisfy the following condition: 0.7<dm/ds<1.0。
6. 6. the imaging lens assembly of claim 1, wherein the optically active region comprises: an object side optical surface facing the object side, and An image side optical surface facing 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. 7. The imaging lens assembly of claim 1, wherein the annular mark structure has a protrusion height h that satisfies the following condition: 0.0025mm≤h≤0.1mm。
8. 8. an imaging lens module, comprising: a lens barrel having a plurality of inner surfaces and forming an inner space, and An imaging lens group disposed in the inner space of the lens barrel, the imaging lens group having an optical axis and comprising at least one lens element, the lens element comprising: An optically effective area through which the optical axis passes, and An outer peripheral portion surrounding the optically effective area, the outer peripheral portion comprising: an object side facing the object side; an image side face facing an image side and corresponding to the object side face; an outer peripheral surface connecting the object side surface and the image side surface and being in physical contact with one of the inner surfaces of the lens barrel; An annular mark structure disposed only on the image side surface and having an annular tip protruding structure surrounding the optical axis, and At least one arc part arranged on the side surface of the object and being an annular convex arc; Wherein, the vertical distance between the annular mark structure and the optical axis is dm, the vertical distance between the arc part and the optical axis is da, the curvature radius of the arc part is Ra, which satisfies the following conditions: 0.75< da/dm <1.25, and 0.025mm≤Ra≤0.5mm。
9. 9. The imaging lens module of claim 8, wherein the object side of the at least one lens element includes an axial alignment structure for bearing against and centering an adjacent other lens element.
10. 10. The imaging lens module of claim 8, wherein the image side of the at least one lens element includes an axial alignment structure for bearing against and centering an adjacent other lens element.
11. 11. The imaging lens module according to claim 8, wherein the radius of curvature of the circular arc portion is Ra, which satisfies the following condition: 0.035mm≤Ra≤0.45mm。
12. 12. the imaging lens module of claim 8, wherein a vertical distance dm between the annular mark structure and the optical axis is dm, and a maximum radius of the outer peripheral surface is ds, which satisfies the following condition: 0.8<dm/ds<1.0。
13. 13. the imaging lens module according to claim 8, wherein a length of a region where the outer peripheral surface contacts with the one of the inner surfaces in a direction parallel to the optical axis is L, which satisfies the following condition: L<0.1mm。
14. 14. The imaging lens module of claim 8, wherein the optically active area comprises: an object side optical surface facing the object side, and An image side optical surface facing 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. 15. The imaging lens module of claim 14, wherein a vertical distance dm from the annular mark structure to the optical axis, and a maximum radius di of the image side optical surface, satisfies the following condition: 0.3<di/dm<0.8。
16. 16. The imaging lens module of claim 8, wherein the annular mark structure has a protrusion height h that satisfies the following condition: 0.0025mm≤h≤0.1mm。
17. 17. a camera module, comprising: The imaging lens module as claimed in claim 8, and The electronic photosensitive element is arranged on an imaging surface of the imaging lens module.
18. 18. An electronic device, comprising: the camera module of claim 17.

Description

Imaging lens group, imaging lens module, camera module and electronic device Technical Field The present disclosure relates to an imaging lens assembly, an imaging lens module and a camera module, and more particularly to a miniaturized imaging lens assembly, an imaging lens module and a camera module for use in an electronic device. Background In recent years, camera modules have been rapidly developed, and are widely used in various fields, such as portable electronic devices, headsets, vehicle tools, etc., and camera modules and electronic photosensitive devices have been rapidly developed. However, as technology advances, the quality requirements of the camera module are also increasing. Therefore, developing an imaging lens module capable of improving the dimensional accuracy and release yield of lens elements is an important and urgent problem in industry. Disclosure of Invention The present disclosure provides an imaging lens assembly, an imaging lens module, a camera module and an electronic device, wherein an annular mark structure is disposed on only one surface of a lens element, and an arc portion is disposed on the other surface of the lens element, so that reflection of unnecessary light inside the lens element can be effectively reduced, and meanwhile, the possibility of excessive reflection of unnecessary light when the annular mark structure is disposed on both an object side surface and an image side surface of the lens element can be avoided. Therefore, the size precision and the release yield of the lens element can be improved. An imaging lens assembly having an optical axis and comprising at least one lens element is provided according to one embodiment of the present disclosure. The lens element includes an optically effective region and an outer periphery. The optical axis passes through the optical effective area, and the periphery surrounds the optical effective area. The outer peripheral portion comprises an object side surface, an image side surface, an outer peripheral surface, an annular marking structure and at least one circular arc portion. The object side faces an object side, the image side faces an image side, and the image side corresponds to the object side. The outer peripheral surface connects the object side surface and the image side surface. The annular mark structure is arranged on one of the object side surface and the image side surface, and the annular mark structure is an annular tip protruding structure and surrounds the optical axis. The arc part is arranged on the other one of the object side surface and the image side surface, and the arc part is an annular convex arc. The vertical distance from the annular mark structure to the optical axis is dm, the vertical distance from the circular arc part to the optical axis is da, the curvature radius of the circular arc part is Ra, and the circular arc part meets the following conditions that 0.82< da/dm <1.18, and Ra is more than or equal to 0.025mm and less than or equal to 0.5mm. The imaging lens assembly according to the embodiment of the preceding paragraph, wherein the lens element may be injection molded, and may further include at least one molding mark disposed on the outer peripheral surface. The imaging lens group according to the embodiment of the preceding paragraph, wherein the annular mark structure has a distance t from the injection mark in a direction perpendicular to the optical axis, which satisfies the condition that t≤0.4 mm. The imaging lens group according to the embodiment of the preceding paragraph, wherein the radius of curvature of the circular arc portion is Ra, may satisfy the condition that Ra is 0.035 mm≤Ra≤0.45 mm. The imaging lens assembly according to the embodiment of the preceding paragraph, wherein the vertical distance from the annular mark structure to the optical axis is dm, and the maximum radius of the outer peripheral surface is ds, satisfies the following condition that 0.7< dm/ds <1.0. The imaging lens system according to the embodiment of the invention, wherein the optically effective area comprises an object-side optical surface and an image-side optical surface. The object-side optical surface faces the object-side and the image-side optical surface faces the image-side, wherein at least one of the object-side optical surface and the image-side optical surface is an optical aspheric surface. The imaging lens group according to the embodiment of the preceding paragraph, wherein the protrusion height of the annular mark structure is h, may satisfy the condition that 0.0025 mm≤h≤0.1 mm. An imaging lens module according to an embodiment of the present disclosure includes a barrel and an imaging lens assembly. The lens barrel is provided with a plurality of inner surfaces and forms an inner space. The imaging lens group is arranged in the inner space of the lens barrel, has an optical axis and comprises at least one lens element. The lens element includes an optically e