US 2014/0368927 A1Published application

Photographing lens assembly

AssigneeLargan Precision Co., Ltd.

InventorsPo-Lun HSU, Tsung-Han TSAI, Hsin-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 a convex object-side surface. The second lens element, the third lens element and the fourth lens element have refractive power. The fifth lens element with negative refractive power has a convex object-side surface and a concave image-side surface, wherein the surfaces thereof are aspheric, and at least one of the surfaces thereof has at least one inflection point thereon. The sixth lens element with negative refractive power has a convex object-side surface and a concave image-side surface, wherein the surfaces thereof are aspheric, and at least one of the surfaces thereof has at least one inflection point.

Claims27

Dependent claims

A photographing lens assembly comprising, in order from an object side to an image side:

a first lens element with positive refractive power having a convex object-side surface;
a second lens element having refractive power;
a third lens element having refractive power;
a fourth lens element having refractive power;
a fifth lens element with negative refractive power having a convex object-side surface and a concave image-side surface, wherein the object-side surface and the image-side surface of the fifth lens element are aspheric, and the fifth lens element has at least one inflection point on at least one of the object-side surface and the image-side surface thereof;
and
a sixth lens element with negative refractive power having a convex object-side surface and a concave image-side surface, wherein the object-side surface and the image-side surface of the sixth lens element are aspheric, and the sixth lens element has at least one inflection point on at least one of the object-side surface and the image-side surface thereof;
wherein the photographing lens assembly has a total of six lens elements with refractive power, each of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element is a single and non-cemented lens element, a focal length of the fifth lens element is f5, a focal length of the sixth lens element is f6, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, and the following relationships are satisfied:
0<f6/f5<1.2;
and
0.5<T34/T23<1.7.

8 more elements

A photographing lens assembly comprising, in order from an object side to an image side:

a first lens element with positive refractive power having a convex object-side surface;
a second lens element having refractive power,
a third lens element having refractive power,
a fourth lens element having refractive power;
a fifth lens element with negative refractive power having a convex object-side surface and a concave image-side surface, wherein the object-side surface and the image-side surface of the fifth lens element are aspheric, and the fifth lens element has at least one inflection point on at least one of the object-side surface and the image-side surface thereof;
and
a sixth lens element with negative refractive power having a concave image-side surface, wherein an object-side surface and the image-side surface of the sixth lens element are aspheric, and the sixth lens element has at least one inflection point on at least one of the object-side surface and the image-side surface thereof;
wherein the photographing lens assembly has a total of six lens elements with refractive power, each of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element is a single and non-cemented lens element, a focal length of the fifth lens element is f5, a focal length of the sixth lens element is f6, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, a maximum image height of the photographing lens assembly is Y, an axial distance between the image-side surface of the sixth lens element and an image plane is BL, and the following relationships are satisfied:
0<f6/f5<1.2;
0.5<T34/T23<1.7;
and
(TD/Y)+(BL/Y)<1.65.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/476,731Filed 3 Sep 2014
Priority: TW 1021076535 Mar 2013
Published: 18 Dec 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

G02B 13/0045
Having at least one aspherical surface: having five or more lenses
G02B 5/005
Optical elements other than lenses: diaphragms
G02B 5/208
Filters: for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
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…

Family

Application13/849,556Continuation · filed 25 Mar 2013
Application14/476,731Continuation
US 2014/0254029 A1Published application
US 8,867,149 B2Related patent
US 9,140,876 B2Related patent
US 2014/0368927 A1This patent

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