US 10,539,762 B2Granted

Photographing lens assembly, image capturing unit and electronic device

AssigneeLargan Precision Co., Ltd.

InventorHsin-Hsuan Huang

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Abstract

A photographing lens assembly includes, in order from an object side to an image side, 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. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element has negative refractive power. The third lens element has positive refractive power, wherein both surfaces thereof are aspheric. The fourth lens element has refractive power, wherein both surfaces thereof are aspheric. The fifth lens element has negative refractive power, wherein both surfaces thereof are aspheric. The sixth lens element with positive refractive power has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof, wherein both of the two surfaces are aspheric.

Claims36

Dependent claims

A photographing lens assembly comprising six lens elements, the six lens elements being, in order from an object side to an image side, 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;

the first lens element having positive refractive power, the second lens element having negative refractive power, the third lens element having an image-side surface being concave in a paraxial region thereof, the fifth lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof, and at least one of an object-side surface and the image-side surface of the fifth lens element having at least one inflection point;
wherein the photographing lens assembly has a total of six lens elements, an axial distance between the fourth lens element and the fifth lens element is larger than an axial distance between the second lens element and the third lens element, the axial distance between the fourth lens element and the fifth lens element is larger than an axial distance between the fifth lens element and the sixth lens element, a focal length of the photographing lens assembly is f, a focal length of the first lens element is f1, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, a focal length of the fifth lens element is f5, a focal length of the sixth lens element is f6, a focal length of the i-th lens element is fi, and the following conditions are satisfied:
|f1|<|fi|, wherein i=2, 3, 4, 5, 6;
and
−1.0<f/f4<0.5.

2 more elements

the first lens element having positive refractive power, the second lens element having negative refractive power, the fourth lens element having an object-side surface being concave in a paraxial region thereof, the fifth lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof, and at least one of an object-side surface and the image-side surface of the fifth lens element having at least one inflection point;
wherein the photographing lens assembly has a total of six lens elements, an axial distance between the fourth lens element and the fifth lens element is larger than an axial distance between the third lens element and the fourth lens element, the axial distance between the fourth lens element and the fifth lens element is larger than an axial distance between the fifth lens element and the sixth lens element, a central thickness of the sixth lens element is larger than a central thickness of the fifth lens element, a focal length of the first lens element is f1, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, a focal length of the fifth lens element is f5, a focal length of the sixth lens element is f6, a focal length of the i-th lens element is fi, and the following condition is satisfied:
|f1|<|fi|, wherein i=2, 3, 4, 5, 6.

the first lens element having positive refractive power, the second lens element having negative refractive power, the third lens element having an image-side surface being concave in a paraxial region thereof, the fifth lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof, at least one of an object-side surface and the image-side surface of the fifth lens element having at least one inflection point, and the sixth lens element having positive refractive power;
wherein the photographing lens assembly has a total of six lens elements, an axial distance between the fourth lens element and the fifth lens element is larger than an axial distance between the fifth lens element and the sixth lens element, a focal length of the first lens element is f1, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, a focal length of the fifth lens element is f5, a focal length of the sixth lens element is f6, a focal length of the i-th lens element is fi, and the following condition is satisfied:
|f1|<|fi|, wherein i=2, 3, 4, 5, 6.

the first lens element having positive refractive power, the second lens element having an image-side surface being concave in a paraxial region thereof, the third lens element having an object-side surface being convex in a paraxial region thereof, the fifth lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, and at least one of the object-side surface and the image-side surface of the fifth lens element having at least one inflection point;
wherein the photographing lens assembly has a total of six lens elements, an axial distance between the fourth lens element and the fifth lens element is larger than an axial distance between the third lens element and the fourth lens element, a focal length of the first lens element is f1, a focal length of the second lens element is f2, and the following condition is satisfied:
|f1|<|f2|.

the first lens element having positive refractive power, at least one of an object-side surface and an image-side surface of the fifth lens element having at least one inflection point, and the sixth lens element with positive refractive power having an image-side surface being convex in a paraxial region thereof;
wherein the photographing lens assembly has a total of six lens elements, an axial distance between the fourth lens element and the fifth lens element is larger than an axial distance between the second lens element and the third lens element, the axial distance between the fourth lens element and the fifth lens element is larger than an axial distance between the third lens element and the fourth lens element, a focal length of the first lens element is f1, a focal length of the second lens element is f2, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, a focal length of the fifth lens element is f5, a focal length of the sixth lens element is f6, a focal length of the i-th lens element is fi, and the following condition is satisfied:
|f1|<|fi|, wherein i=2, 3, 4, 5, 6.

Dependencies are inferred from the claim text.

Facts

Application: 15/893,516Filed 9 Feb 2018 · continuation
Priority: TW 104112136 A15 Apr 2015
Published: US 2018/0180857 A128 Jun 2018
Granted: 21 Jan 2020
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
G02B 9/62
Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -: having six…
G02B 27/0025
Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00: for optical correction, e.g. distorsion,…
G02B
Optical elements, systems or apparatus

Family

Application14/812,570Parent of this continuation · filed 29 Jul 2015
Application15/204,726Parent of this continuation · filed 7 Jul 2016
US 9,417,434 B1Parent of this continuation · filed 16 Aug 2016
US 2018/0180857 A1Pre-grant publication · published 28 Jun 2018
US 9,927,598 B2Parent of this continuation
US 2016/0320592 A1Published application
US 10,539,762 B2This patent

From the US filing history. Foreign family members aren’t listed.