US 12,724,235 B2Granted

Optical photographing lens assembly, image capturing unit and electronic device

AssigneeLargan Precision Co., Ltd.

InventorsYu Jui Lin, Tzu-Chieh Kuo

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Abstract

An optical photographing lens assembly includes seven lens elements which are, in order from an object side to an image side along an optical path, a first lens element through a seventh lens element. Each of the seven lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The object-side surface of the second lens element is convex in a paraxial region thereof. The sixth lens element has positive refractive power. The object-side surface of the seventh lens element is convex in a paraxial region thereof. At least one of the object-side surface and the image-side surface of at least one of the seven lens elements has at least one inflection point in an off-axis region thereof.

Claims25

Dependent claims

An optical photographing lens assembly comprising seven lens elements, the seven 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, a sixth lens element and a seventh lens element, and each of the seven lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;

wherein the second lens element has negative refractive power, the object-side surface of the second lens element is convex in a paraxial region thereof, the image-side surface of the second lens element is concave in a paraxial region thereof, the sixth lens element has positive refractive power, the object-side surface of the seventh lens element is convex in a paraxial region thereof, the image-side surface of the seventh lens element is concave in a paraxial region thereof, and at least one of the object-side surface and the image-side surface of at least one of the seven lens elements has at least one inflection point in an off-axis region thereof;
wherein a central thickness of the fifth lens element is CT5, an axial distance between the fifth lens element and the sixth lens element is T56, a minimum value among an Abbe number of the third lens element, an Abbe number of the fourth lens element and an Abbe number of the fifth lens element is minV345, and the following conditions are satisfied:
5.5
<
CT
⁢
5
/
T
⁢
56
;
and
42.
<
min
⁢
V
⁢
345
<
7
⁢
0
.
0
.

24 more elements

wherein the first lens element has positive refractive power, the object-side surface of the second lens element is convex in a paraxial region thereof, the image-side surface of the second lens element is concave in a paraxial region thereof, the sixth lens element has positive refractive power, the object-side surface of the seventh lens element is convex in a paraxial region thereof, and at least one of the object-side surface and the image-side surface of at least one of the seven lens elements has at least one inflection point in an off-axis region thereof;
wherein a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of the image-side surface of the seventh lens element is R14, a central thickness of the fifth lens element is CT5, an axial distance between the fifth lens element and the sixth lens element is T56, a minimum value among an Abbe number of the third lens element, an Abbe number of the fourth lens element and an Abbe number of the fifth lens element is minV345, and the following conditions are satisfied:
1.6
<
R
⁢
1
/
R
⁢
14
<
4.5
;
5.5
<
CT
⁢
5
/
T
⁢
56
;
and
46.
<
min
⁢
V
⁢
345
<
65.
.

32 more elements

wherein the first lens element has positive refractive power, the object-side surface of the second lens element is convex in a paraxial region thereof, the sixth lens element has positive refractive power, the object-side surface of the sixth lens element is convex in a paraxial region thereof, the object-side surface of the seventh lens element is convex in a paraxial region thereof, the image-side surface of the seventh lens element is concave in a paraxial region thereof, and at least one of the object-side surface and the image-side surface of at least one of the seven lens elements has at least one inflection point in an off-axis region thereof;
wherein a central thickness of the fifth lens element is CT5, an axial distance between the fifth lens element and the sixth lens element is T56, a minimum value among an Abbe number of the third lens element, an Abbe number of the fourth lens element and an Abbe number of the fifth lens element is minV345, and the following conditions are satisfied:
5.5
<
CT
⁢
5
/
T
⁢
56
;
and
42.
<
min
⁢
V
⁢
345
<
70.
.

20 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/207,014Filed 7 Jun 2023
Priority: TW 11211398014 Apr 2023
Published: US 2024/0345367 A117 Oct 2024
Granted: 1 Sep 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G02B 13/0045
Having at least one aspherical surface: having five or more lenses
G02B 1/041
Made of organic materials, e.g. plastics: lenses
G02B 13/02
Optical objectives specially designed for the purposes specified below: telephoto objectives, i.e. systems of the type + - in which the distance…
G02B 9/64
Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -: having more…