US 2023/0408787 A1Published application

Imaging lens assembly, camera module and electronic device

AssigneeLargan Precision Co., Ltd.

InventorsLin An CHANG, Chin Li HSIEH, Chun-Hua TSAI

Life of this patent

Estimating the term…

Loading patent…

Abstract

An imaging lens assembly includes a first plastic lens element and a second plastic lens element arranged along an optical axis. The first plastic lens element includes, in order from a paraxial region to a peripheral region, a first optically effective portion, a first size reduction portion and a first peripheral portion. An object-side surface and an image-side surface of the first size reduction portion each has a roughened surface. The first peripheral portion is to be in physical contact and assembled with adjacent components. The second plastic lens element includes, in order from a paraxial region to a peripheral region, a second optically effective portion, a second size reduction portion and a second peripheral portion. An object-side surface and an image-side surface of the second size reduction portion each has a roughened surface. The second peripheral portion is to be in physical contact and assembled with adjacent components.

Claims20

Dependent claims

An imaging lens assembly comprising:

a first plastic lens element, wherein an optical axis of the imaging lens assembly passes through the first plastic lens element, and the first plastic lens element comprises, in order from a paraxial region thereof to a peripheral region thereof:
a first optically effective portion;
a first size reduction portion, wherein each of an object-side surface and an image-side surface of the first size reduction portion has at least one roughened surface;
and
a first peripheral portion configured to be in physical contact and assembled with adjacent components;
and
a second plastic lens element disposed on an image side of the first plastic lens element, wherein the optical axis passes through the second plastic lens element, and the second plastic lens element comprises, in order from a paraxial region thereof to a peripheral region thereof:
a second optically effective portion;
a second size reduction portion, wherein each of an object-side surface and an image-side surface of the second size reduction portion has at least one roughened surface;
and
a second peripheral portion configured to be in physical contact and assembled with adjacent components;
wherein the imaging lens assembly further comprises a glass lens element, and the glass lens element is disposed corresponding to one of the first plastic lens element and the second plastic lens element;
wherein a central thickness of the first optically effective portion is CT1, a central thickness of the second optically effective portion is CT2, a minimum thickness of the first size reduction portion is ET1m, a peripheral thickness of the first optically effective portion is ET1, a minimum thickness of the second size reduction portion is ET2m, a peripheral thickness of the second optically effective portion is ET2, an edge thickness of the glass lens element is PTG, a central thickness of the glass lens element is CTG, and the following conditions are satisfied:
CT1≤0.33 mm;
CT2≤0.33 mm;
ET1m/ET1≤1.0;
ET2m/ET2≤1.0;
and
0.12≤PTG/CTG≤1.05.

16 more elements

An imaging lens assembly comprising:

a first plastic lens element, wherein an optical axis of the imaging lens assembly passes through the first plastic lens element, and the first plastic lens element comprises, in order from a paraxial region thereof to a peripheral region thereof:
a first optically effective portion;
a first size reduction portion, wherein each of an object-side surface and an image-side surface of the first size reduction portion has at least one roughened surface;
and
a first peripheral portion configured to be in physical contact and assembled with adjacent components;
and
a second plastic lens element disposed on an image side of the first plastic lens element, wherein the optical axis passes through the second plastic lens element, and the second plastic lens element comprises, in order from a paraxial region thereof to a peripheral region thereof:
a second optically effective portion;
a second size reduction portion, wherein each of an object-side surface and an image-side surface of the second size reduction portion has at least one roughened surface;
and
a second peripheral portion, configured to be in physical contact and assembled with adjacent components;
wherein a central thickness of the first optically effective portion is CT1, a central thickness of the second optically effective portion is CT2, a minimum thickness of the first size reduction portion is ET1m, a peripheral thickness of the first optically effective portion is ET1, a minimum thickness of the second size reduction portion is ET2m, a peripheral thickness of the second optically effective portion is ET2, a release force required to release the roughened surfaces of the first size reduction portion is Fr1, a release force required to release the first optically effective portion is Fs1, a release force required to release the roughened surfaces of the second size reduction portion is Fr2, a release force required to release the second optically effective portion is Fs2, and the following conditions are satisfied:
CT1≤0.33 mm;
CT2≤0.33 mm;
ET1m/ET1≤1.0;
ET2m/ET2≤1.0;
1.5≤Fr1/Fs1≤25;
and
1.5≤Fr2/Fs2≤25.

16 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/887,328Filed 12 Aug 2022
Priority: TW 11112212115 Jun 2022
Published: 21 Dec 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G02B 7/021
For lenses: for more than one lens
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 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 13/0045
Having at least one aspherical surface: having five or more lenses