US 2026/0219475 A1Published application

Photographing optical lens assembly, image capturing unit and electronic device

AssigneeLargan Precision Co., Ltd.

InventorsYu-Chun KE, Cheng-Yu TSAI

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Abstract

A photographing optical lens assembly includes three lens elements which are, in order from an object side to an image side along an optical path: a first lens element, a second lens element and a third lens element. Each of the three lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element has positive refractive power, the object-side surface of the first lens element is convex in a paraxial region thereof, and the image-side surface of the first lens element is concave in a paraxial region thereof. The third lens element has negative refractive power, the image-side surface of the third lens element is concave in a paraxial region thereof, and the image-side surface of the third lens element has at least one inflection point.

Claims29

Dependent claims

A photographing optical lens assembly comprising three lens elements, the three lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element and a third lens element, and each of the three lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

wherein the first lens element has positive refractive power, the object-side surface of the first lens element is convex in a paraxial region thereof, the image-side surface of the first lens element is concave in a paraxial region thereof, the third lens element has negative refractive power, the image-side surface of the third lens element is concave in a paraxial region thereof, and the image-side surface of the third lens element has at least one inflection point;
wherein an Abbe number of the second lens element is V2, an Abbe number of the third lens element is V3, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a central thickness of the third lens element is CT3, an axial distance between the first lens element and the second lens element is T12, a curvature radius of the object-side surface of the third lens element is R5, a curvature radius of the image-side surface of the third lens element is R6, and the following conditions are satisfied:
10.
<
V
⁢
2
+
V
⁢
3
<
70.
;
0
<
10
×
❘
"\[LeftBracketingBar]"
f
⁢
3
/
f
⁢
2
❘
"\[RightBracketingBar]"
<
4.5
;
0.4
<
CT
⁢
3
/
T
⁢
12
<
2.5
;
and
0
<
(
R
⁢
5
+
R
⁢
6
)
/
R
⁢
5
-
R
⁢
6
)
<
2.
.

65 more elements

wherein the first lens element has positive refractive power, the object-side surface of the first lens element is convex in a paraxial region thereof, the image-side surface of the first lens element is concave in a paraxial region thereof, the third lens element has negative refractive power, the image-side surface of the third lens element is concave in a paraxial region thereof, and the image-side surface of the third lens element has at least one critical point in an off-axis region thereof;
wherein an Abbe number of the second lens element is V2, an Abbe number of the third lens element is V3, a focal length of the photographing optical lens assembly is f, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a curvature radius of the image-side surface of the first lens element is R2, and the following conditions are satisfied:
10.
<
V
⁢
2
+
V
⁢
3
<
70.
;
0
<
10
×
❘
"\[LeftBracketingBar]"
f
⁢
3
/
f
⁢
2
❘
"\[RightBracketingBar]"
<
4.5
;
and
0.8
<
f
/
R2
<
2
.50
;
wherein an Abbe number of the first lens element is V1, the Abbe number of the second lens element is V2, the Abbe number of the third lens element is V3, an Abbe number of the i-th lens element is Vi, a refractive index of the first lens element is N1, a refractive index of the second lens element is N2, a refractive index of the third lens element is N3, a refractive index of the i-th lens element is Ni, and at least one lens element of the photographing optical lens assembly satisfies the following condition:
5.
<
Vi
/
Ni
<
14.5
,
wherein
⁢
i
=
1
,
2
⁢
or
3.

58 more elements

wherein the first lens element has positive refractive power, the object-side surface of the first lens element is convex in a paraxial region thereof, the image-side surface of the first lens element is concave in a paraxial region thereof, the third lens element has negative refractive power, the image-side surface of the third lens element is concave in a paraxial region thereof, and the image-side surface of the third lens element has at least one critical point in an off-axis region thereof;
wherein an Abbe number of the second lens element is V2, an Abbe number of the third lens element is V3, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a curvature radius of the image-side surface of the first lens element is R2, a curvature radius of the image-side surface of the third lens element is R6, an axial distance between the object-side surface of the first lens element and the image-side surface of the third lens element is TD, an entrance pupil diameter of the photographing optical lens assembly is EPD, and the following conditions are satisfied:
10.
<
V
⁢
2
+
V
⁢
3
<
7
0.
;
0
<
10
×
❘
"\[LeftBracketingBar]"
f
⁢
3
/
f
⁢
2
❘
"\[RightBracketingBar]"
<
7.
;
0
<
R
⁢
2
/
R
⁢
6
<
2
.00
;
and
1.
<
TD
/
EPD
<
1.8
.

52 more elements

Dependencies are inferred from the claim text.