US 12,724,237 B2Granted

Optical photographing lens assembly, image capturing unit and electronic device

AssigneeLargan Precision Co., Ltd.

InventorsKuan-Ting Yeh, Cheng-Yu Tsai

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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, 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. The object-side surface of the first lens element is convex in a paraxial region thereof. The second lens element has positive refractive power. The third lens element has negative refractive power. The image-side surface of the third lens element is concave in a paraxial region thereof. The image-side surface of the seventh lens element is concave in a paraxial region thereof. At least one of the object-side surface and the image-side surface of at least one lens element of the seven lens elements has at least one inflection point.

Claims26

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 object-side surface of the first lens element is convex in a paraxial region thereof, the second lens element has positive refractive power, the third lens element has negative refractive power, the image-side surface of the third lens element is concave 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 lens element of the seven lens elements has at least one inflection point;
wherein an axial distance between an imaged object and the object-side surface of a lens element closest to the object side is defined as an object distance, an axial distance between the first lens element and the second lens element in the optical photographing lens assembly with an infinite object distance is T12L, an axial distance between the object-side surface of the second lens element and the image-side surface of the fifth lens element in the optical photographing lens assembly with the infinite object distance is Dr3r10L, an axial distance between the object-side surface of the second lens element and the image-side surface of the seventh lens element in the optical photographing lens assembly with the infinite object distance is Dr3r14L, an axial distance between the object-side surface of the sixth lens element and the image-side surface of the seventh lens element in the optical photographing lens assembly with the infinite object distance is Dr11r14L, a focal length of the fourth lens element is f4, a focal length of the fifth lens element is f5, and the following conditions are satisfied:
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60 more elements

wherein the second lens element has positive refractive power, the object-side surface of the second lens element is convex 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, the fourth lens element has positive refractive power, 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 lens element of the seven lens elements has at least one inflection point;
wherein an axial distance between an imaged object and the object-side surface of a lens element closest to the object side is defined as an object distance, an axial distance between the first lens element and the second lens element in the optical photographing lens assembly with an infinite object distance is T12L, an axial distance between the object-side surface of the second lens element and the image-side surface of the seventh lens element in the optical photographing lens assembly with the infinite object distance is Dr3r14L, an axial distance between the object-side surface of the lens element closest to the object side and an image surface in the optical photographing lens assembly with the infinite object distance is TLL, an axial distance between the image-side surface of a lens element closest to the image side and the image surface in the optical photographing lens assembly with the infinite object distance is BLL, an Abbe number of the fifth lens element is V5, a refractive index of the fifth lens element is N5, and the following conditions are satisfied:
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and
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.

40 more elements

wherein the second lens element has positive refractive power, the object-side of the second lens element is convex 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, the fourth lens element has positive refractive power, the image-side surface of the fourth lens element is convex in a paraxial region thereof, the seventh lens element has negative refractive power, and at least one of the object-side surface and the image-side surface of the seventh lens element has at least one inflection point;
wherein an axial distance between an imaged object and the object-side surface of a lens element closest to the object side is defined as an object distance, an axial distance between the first lens element and the second lens element in the optical photographing lens assembly with an infinite object distance is T12L, an axial distance between the object-side surface of the second lens element and the image-side surface of the seventh lens element in the optical photographing lens assembly with the infinite object distance is Dr3r14L, an axial distance between the object-side surface of the lens element closest to the object side and an image surface in the optical photographing lens assembly with the infinite object distance is TLL, an axial distance between the image-side surface of a lens element closest to the image side and the image surface in the optical photographing lens assembly with the infinite object distance is BLL, and the following conditions are satisfied:
0.5
<
T
⁢
12
⁢
L
/
Dr
⁢
3
⁢
r
⁢
14
⁢
L
<
2.5
;
and
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1.
<
TLL
/
BLL
<
10.
.

29 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/398,838Filed 28 Dec 2023
Priority: TW 11214379814 Nov 2023
Published: US 2025/0155680 A115 May 2025
Granted: 1 Sep 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G02B 13/0045
Having at least one aspherical surface: having five or more lenses
G03B 17/17
Bodies: with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
G02B
Optical elements, systems or apparatus
G03B
Apparatus or arrangements for taking photographs or for projecting or viewing them