US 2023/0418030 A1Published application

Optical image capturing system

AssigneeLargan Precision Co., Ltd.

InventorsTsung-Han TSAI, Hsin-Hsuan HUANG

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Abstract

An optical image capturing system 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, a sixth lens element and a seventh lens element. The first, the second and the third lens elements all have refractive power. The fourth lens element with refractive power has both surfaces being aspheric. The fifth lens element with refractive power has both surfaces being aspheric. The sixth lens element with refractive power has an image-side surface having at least one convex shape at a peripheral region thereof and both surfaces being aspheric. The seventh lens element with refractive power has an image-side surface having at least one convex shape at a peripheral region thereof, wherein both surfaces being aspheric, and at least one surface has at least one inflection point thereon.

Claims20

Dependent claims

An optical image capturing system comprising seven lens elements, the seven 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, a sixth lens element, and a seventh lens element;

wherein each of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element has an object-side surface facing towards the object side and an image-side surface facing towards the image side;
wherein the object-side surface of the seventh lens element comprises at least one inflection point;
a central thickness of the second lens element is smaller than a central thickness of the third lens element;
an axial distance between the first lens element and the second lens element is smaller than an axial distance between the sixth lens element and the seventh lens element;
wherein a focal length of the optical image capturing system is f, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, and the following conditions are satisfied:
|f/f3|+|f/f4|<1.0;
and
28<V1−V2<42.

5 more elements

wherein each of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element has an object-side surface facing towards the object side and an image-side surface facing towards the image side;
wherein the image-side surface of the fourth 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, the object-side surface of the seventh lens element comprises at least one inflection point, the image-side surface of the seventh lens element comprises at least one inflection point;
a sign of a focal length of the first lens element is different from a sign of a focal length of the fifth lens element;
wherein a focal length of the optical image capturing system is f, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, and the following condition is satisfied:
|f/f3|+|f/f4|<1.0.

3 more elements

wherein each of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element has an object-side surface facing towards the object side and an image-side surface facing towards the image side;
wherein the fourth lens element has positive refractive power;
the object-side surface of the seventh lens element comprises at least one inflection point, the image-side surface of the seventh lens element comprises at least one inflection point;
an axial distance between the first lens element and the second lens element is smaller than an axial distance between the sixth lens element and the seventh lens element;
wherein a focal length of the optical image capturing system is f, a focal length of the third lens element is f3, a focal length of the fourth lens element is f4, and the following condition is satisfied:
|f/f3|+|f/f4|<1.0.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/461,573Filed 6 Sep 2023
Priority: TW 1011244306 Jul 2012
Published: 28 Dec 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G02B 13/0045
Having at least one aspherical surface: having five or more lenses
G02B 3/04
With non-spherical faces: with continuous faces that are rotationally symmetrical but deviate from a true sphere , e.g. so called "aspheric" lenses
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…
G02B 13/18
Optical objectives specially designed for the purposes specified below: with lenses having one or more non-spherical faces, e.g. for reducing…

Family

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Application18/461,573Continuation
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