US 2025/0370221 A1Published application

Photography optical lens assembly, image capturing unit and electronic device

AssigneeLargan Precision Co., Ltd.

InventorsI-Chieh CHEN, Yu-Han SHIH

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Abstract

A photography optical lens assembly includes six 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, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. Each of the six 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 image-side surface of the fifth lens element is concave in a paraxial region thereof and has at least one critical point in an off-axis region thereof. The object-side surface of the sixth lens element is convex in a paraxial region thereof and has at least one critical point in an off-axis region thereof.

Claims25

Dependent claims

A photography optical lens assembly comprising six lens elements, the six 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, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element, and each of the six 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 image-side surface of the fifth lens element is concave in a paraxial region thereof and has at least one critical point in an off-axis region thereof, and the object-side surface of the sixth lens element is convex in a paraxial region thereof and has at least one critical point in an off-axis region thereof;
wherein a fourth smallest value among Abbe numbers of all lens elements of the photography optical lens assembly is VS4, a central thickness of the first lens element is CT1, a central thickness of the second lens element is CT2, an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, a curvature radius of the image-side surface of the fourth lens element is R8, a curvature radius of the image-side surface of the sixth lens element is R12, and the following conditions are satisfied:
10.
<
VS
⁢
4
<
46.
;
⁢
1.
50
<
CT
⁢
1
/
CT
⁢
2
<
7
.00
;
⁢
0.
≤
T
⁢
23
/
T
⁢
12
<
0.72
;
and
⁢
-
4.8
<
R
⁢
8
/
R
⁢
12
<
-
0
.
8
⁢
0
.

55 more elements

wherein the object-side surface of the fourth lens element is concave in a paraxial region thereof, the image-side surface of the fourth lens element is convex in a paraxial region thereof, the image-side surface of the fifth lens element is concave in a paraxial region thereof, and the object-side surface of the sixth lens element is convex in a paraxial region thereof and has at least one critical point in an off-axis region thereof;
wherein a fourth smallest value among Abbe numbers of all lens elements of the photography optical lens assembly is VS4, a central thickness of the first lens element is CT1, a central thickness of the second lens element is CT2, an axial distance between the second lens element and the third lens element is T23, a curvature radius of the image-side surface of the fourth lens element is R8, a curvature radius of the image-side surface of the sixth lens element is R12, a focal length of the photography optical lens assembly is f, and the following conditions are satisfied:
10.
<
VS
⁢
4
<
46.
;
1.5
<
CT
⁢
1
/
CT
⁢
2
<
7.
;
0.
≤
10
×
T
⁢
23
/
CT
⁢
1
<
3.
;
and
0.01
<
❘
"\[LeftBracketingBar]"
R
⁢
8
❘
"\[RightBracketingBar]"
/
f
+
❘
"\[LeftBracketingBar]"
R
⁢
12
❘
"\[RightBracketingBar]"
/
f
<
3.
.

58 more elements

Dependencies are inferred from the claim text.