Imaging lens system, camera module and electronic device

Patent metadata

Field	Value
Publication number	US-11815731-B2
Application number	US-202016838846-A
Country	US
Kind code	B2
Filing date	Apr 2, 2020
Priority date	Feb 12, 2020
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

An imaging lens system has an optical axis and includes a plastic lens barrel and an imaging lens assembly disposed in the plastic lens barrel. The plastic lens barrel surrounds the optical axis and includes an object-side surface, an image-side surface, an inner annular portion and an outer annular portion. The object-side and image-side surfaces are oppositely disposed and substantially perpendicular to the optical axis. The inner and outer annular portions are connected to the object-side and image-side surfaces. The inner annular portion has an inner parallel annular surface, and the outer annular portion has a first outer annular surface and a gate trace. The imaging lens assembly includes a plurality of imaging lens elements. One of the imaging lens elements has an outer diameter larger than π 2 millimeters. The one of the imaging lens elements has an outer edge in physical contact with the inner parallel annular surface.

First claim

What is claimed is:

1. An imaging lens system, having an optical axis, and the imaging lens system comprising:
a plastic lens barrel, made of black plastic material by injection molding, the plastic lens barrel surrounding the optical axis and comprising:
an object-side surface, wherein the object-side surface is substantially perpendicular to the optical axis;
an image-side surface, wherein the image-side surface is substantially perpendicular to the optical axis and is disposed opposite to the object-side surface;
an inner annular portion, wherein the inner annular portion is connected to the object-side surface and the image-side surface, and the inner annular portion has at least one inner parallel annular surface having a diameter larger than π 2 millimeters, and π is pi; and
an outer annular portion, wherein the outer annular portion is connected to the object-side surface and the image-side surface, the outer annular portion is located farther away from the optical axis than the inner annular portion, and the outer annular portion has a first outer annular surface and at least three gate traces; and

an imaging lens assembly, wherein the imaging lens assembly is disposed in the plastic lens barrel and comprises:
a plurality of imaging lens elements, wherein one of the plurality of imaging lens elements has an outer diameter larger than π 2 millimeters, the one of the plurality of imaging lens elements has an outer edge in physical contact with the at least one inner parallel annular surface of the inner annular portion;

wherein the first outer annular surface, the at least three gate traces and the at least one inner parallel annular surface are respectively disposed in order from an object side to an image side; and
wherein the first outer annular surface is tapered off towards the object-side surface, an angle between the first outer annular surface and the optical axis is a, and the following condition is satisfied:
5 [deg.]≤α≤65 [deg.].

2. The imaging lens system of claim 1 , wherein the at least three gate traces are axisymmetric to the optical axis.

3. The imaging lens system of claim 2 , wherein the outer annular portion has at least three planes, and the at least three gate traces are respectively disposed on the at least three planes.

4. The imaging lens system of claim 1 , wherein the angle between the first outer annular surface and the optical axis is a, and the following condition is satisfied:
15 [deg.]≤α≤55 [deg.].

5. The imaging lens system of claim 1 , wherein a maximum outer diameter of the object-side surface is smaller than a maximum outer diameter of the image-side surface.

6. The imaging lens system of claim 1 , wherein the plastic lens barrel is a non-threaded lens barrel.

7. The imaging lens system of claim 1 , wherein the at least one inner parallel annular surface and the one of the plurality of imaging lens elements are partially fitted with each other.

8. The imaging lens system of claim 1 , wherein a distance in parallel with the optical axis between the image-side surface and the object-side surface of the plastic lens barrel is Lb, and the following condition is satisfied:
5 [mm]< Lb< 15 [mm].

9. A camera module, comprising:
the imaging lens system of claim 1 ; and
an image sensor disposed on an image surface of the imaging lens system.

10. An electronic device, comprising:
the camera module of claim 9 .

Assignees

• Largan Precision Co Ltd

Inventors

• Chang Lin An
• Chou Ming-Ta

Classifications

• G03B30/00

  Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles · CPC title

• G03B17/12

  with means for supporting objectives, supplementary lenses, filters, masks, or turrets · CPC title

• G02B7/021 Primary

  for more than one lens · CPC title

• G02B7/022

  lens and mount having complementary engagement means, e.g. screw/thread · CPC title

• G02B13/002

  having at least one aspherical surface · CPC title