Imaging lens system, camera module and electronic device

Patent metadata

Field	Value
Publication number	US-2025237851-A2
Application number	US-202418972534-A
Country	US
Kind code	A2
Filing date	Dec 6, 2024
Priority date	Aug 9, 2021
Publication date	Jul 24, 2025
Grant date	—

Abstract

An imaging lens system includes a lens barrel element and an imaging lens assembly disposed on the lens barrel element and including a first imaging lens element, a spacer element and a second imaging lens element. The spacer element has a second object-side contact surface corresponding to a first image-side contact surface of the first imaging lens element. The second imaging lens element has a third object-side contact surface corresponding to a second image-side contact surface of the spacer element. The lens barrel element and the spacer element form a buffer structure closer to an optical axis than the first image-side contact surface and including a first gap and a second gap located closer to the optical axis than the first gap. The first gap overlaps the third object-side contact surface in a direction parallel to the optical axis. A step difference is between the first and second gaps.

First claim

What is claimed is:

1 . An imaging lens system, comprising:
a lens barrel element; and an imaging lens assembly, disposed on the lens barrel element, and the imaging lens assembly comprising, in order from an object side to an image side:
a first imaging lens element, having a first image-side contact surface;
a spacer element, having a second object-side contact surface and a second image-side contact surface, and the second object-side contact surface corresponding to the first image-side contact surface; and
a second imaging lens element, having a third object-side contact surface, and the third object-side contact surface corresponding to the second image-side contact surface;
wherein the lens barrel element and the spacer element together form a buffer structure located farther away from an optical axis of the imaging lens assembly than the first image-side contact surface to the optical axis, and the buffer structure comprises:
a first gap, wherein the first gap at least partially overlaps the third object-side contact surface in a direction parallel to the optical axis; and
a second gap, wherein a step difference is between the first gap and the second gap, and the second gap is located closer to the optical axis than the first gap to the optical axis;
wherein a width of the first gap is g1, a width of the second gap is g2, an inner diameter of the first image-side contact surface is ϕi1, an inner diameter of the first gap is ϕg1, and the following conditions are satisfied:

0
.
0

⁢
1

≤

g
⁢
1
/
g
⁢
2

≤
0.9

;
and

0.5

≤

1000
×
g
⁢
1
/

(

Φ
⁢
g
⁢
1
-
Φ
⁢
i
⁢
1

)

≤

1
⁢

5
.

2 . The imaging lens system of claim 1 , wherein the width of the first gap is g1, and the following condition is satisfied:

g
⁢
1

≤

12
⁢

µ
⁢

m
.

3 . The imaging lens system of claim 2 , wherein the width of the first gap is g1, and the following condition is satisfied:

g
⁢
1

≤

8
⁢

µ
⁢

m
.

4 . The imaging lens system of claim 3 , wherein the width of the first gap is g1, and the following condition is satisfied:

g
⁢
1

≤

4.5

µ
⁢

m
.

5 . The imaging lens system of claim 1 , wherein an outer diameter of the first image-side contact surface is ϕo1, an outer diameter of the second image-side contact surface is ϕo2, and the following condition is satisfied:

0.5
<

Φ
⁢
o
⁢
1
/
Φ
⁢
o
⁢
2

<

0
.
9

⁢

0
.

6 . The imaging lens system of claim 1 , wherein the first image-side contact surface is provided with a light absorption coating layer, and the light absorption coating layer is in physical contact with the spacer element.

7 . The imaging lens system of claim 1 , wherein the third object-side contact surface is provided with a light absorption coating layer, and the light absorption coating layer is in physical contact with the spacer element.

8 . A camera module, comprising:
the imaging lens system of claim 1 ; and an image sensor, disposed on an image surface of the imaging lens system.

9 . An electronic device, comprising:
the camera module of claim 8 .

10 . An imaging lens system, comprising:
a lens barrel element; and an imaging lens assembly, disposed on the lens barrel element, and the imaging lens assembly comprising, in order from an object side to an image side:
a first imaging lens element, having a first image-side contact surface;
a spacer element, having a second object-side contact surface and a second image-side contact surface, and the second object-side contact surface corresponding to the first image-side contact surface; and
a second imaging lens element, having a third object-side contact surface, and the third object-side contact surface corresponding to the second image-side contact surface;
wherein the lens barrel element and the spacer element together form a buffer structure located farther away from an optical axis of the imaging lens assembly than the first image-side contact surface to the optical axis, and the buffer structure comprises:
a first gap, wherein the first gap at least partially overlaps the third object-side contact surface in a direction parallel to the optical axis; and
a second gap, wherein a step difference is between the first gap and the second gap, and the second gap is located closer to the optical axis than the first gap to the optical axis;
wherein an inner diameter of the first gap is ϕg1, an outer diameter of the first image-side contact surface is ϕo1, an outer diameter of the second image-side contact surface is ϕo2, a width of the first gap is g1, an inner diameter of the first image-side contact surface is ϕi1, and the following conditions are satisfied:

Assignees

• Largan Precision Co Ltd

Inventors

• Huang Hsuan-Chin
• Chang Lin An
• Chou Ming-Ta
• Tsai Chun-Tang

Classifications

• G02B7/021

  for more than one lens · CPC title

• G02B9/04

  having two components only · CPC title

• G02B13/003 Primary

  having two lenses · CPC title

• G02B7/026 Primary

  using retaining rings or springs (G02B7/027 takes precedence) · CPC title