Lens module

Patent metadata

Field	Value
Publication number	US-11353776-B2
Application number	US-202016794503-A
Country	US
Kind code	B2
Filing date	Feb 19, 2020
Priority date	Mar 29, 2019
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

A lens module includes a lens barrel, a lens group, and a soma. The soma includes a first end surface facing an object side and a second end surface facing an image side. An end point of the lens group closest to the object side is defined as an origin. An angle formed by a line connecting the origin to a point on the first end surface closest to an optical axis and the optical axis is defined as a first angle α. An angle formed by a line connecting the origin to a point on the second end surface closest to the optical axis and the optical axis is defined as a second angle β. The first angle α and the second angle β satisfy the following relationship: β>34.5° and α-β<0.4°.

First claim

What is claimed is:

1. A lens module comprising:
a lens barrel;
a lens group located within the lens barrel; and
at least one soma located between two lenses of the lens group; wherein:
the at least one soma comprises a first end surface and a second end surface opposite the first end surface;
the first end surface faces an object side of the lens module, and the second end surface faces an image side of the lens module;
an end point of the lens group closest to the object side is defined as an origin;
an angle formed by an imaginary line connecting the origin to a point on the first end surface closest to the optical axis and the optical axis is defined as a first angle α;
an angle formed by an imaginary line connecting the origin to a point on the second end surface closest to the optical axis and the optical axis is defined as a second angle β; and
the first angle α and the second angle β of the at least one soma satisfy the following relationship: β>34.5° and α-β<0.4°.

2. The lens module of claim 1 , wherein:
the at least one soma comprises a fixing layer and two light absorption layers respectively located on opposite sides of the fixing layer.

3. The lens module of claim 2 , wherein:
an inner diameter of the fixing layer is less than an inner diameter of the light absorption layers; and
an inner annular surface of the fixing layer is recessed between the light absorption layers.

4. The lens module of claim 2 , wherein:
the fixing layer is made of polyethylene terephthalate; and
the light absorption layer is made of a carbon material.

5. The lens module of claim 1 , wherein:
the lens group comprises a first lens, a second lens, a third lens, and a fourth lens sequentially stacked from the object side to the image side of the lens module; and
the at least one soma is located between the second lens and the third lens.

6. The lens module of claim 5 , wherein:
the first angle α is 35°, and the second angle β is 34.7°.

7. The lens module of claim 5 , wherein:
a thickness of the soma is 0.16 mm.

8. The lens module of claim 5 , further comprising a retainer, wherein:
the retainer is adhered on a side of the fourth lens facing the image side; and
the retainer supports and fixes the lens group in the lens barrel.

9. The lens module of claim 5 , further comprising at least one spacer, wherein:
the at least one spacer is located between two adjacent lenses of the lens group, the at least one spacer maintains a predetermined interval between the at least two adjacent lenses.

10. The lens module of claim 9 , wherein:
the at least one spacer is located between peripheral edge portions of the third lens and the fourth lens.

11. A lens module applicable in an electronic device, the lens module comprising:
a lens barrel;
a lens group composed of a plurality of lenses;
a plurality of somas, each of the plurality of somas located between two lenses of the lens group;
at least one spacer located between two adjacent lenses of the lens group, the at least one spacer maintaining a predetermined interval between the at least two adjacent lenses; and
a retainer adhered on a side of the lens group facing the image side; wherein:
the lens group, the plurality of somas, the at least one spacer, and the retainer are received within the lens barrel;
each of the plurality of somas comprises a first end surface and a second end surface opposite the first end surface;
the first end surface faces an object side of the lens module, and the second end surface faces an image side of the lens module;
an end point of the lens group closest to the object side is defined as an origin;
an angle formed by an imaginary line connecting the origin to a point on the first end surface closest to the optical axis and the optical axis is defined as a first angle α;
an angle formed by an imaginary line connecting the origin to a point on the second end surface closest to the optical axis and the optical axis is defined as a second angle β; and
the first angle α and the second angle β of at least one of the plurality of somas satisfy the following relationship: β>34.5° and α-β<0.4°.

12. The lens module of claim 11 , wherein:
the at least one soma comprises a fixing layer and two light absorption layers respectively located on opposite sides of the fixing layer.

13. The lens module of claim 12 , wherein:
an inner diameter of the fixing layer is less than an inner diameter of the light absorption layers; and
an inner annular surface of the fixing layer is recessed between the light absorption layers.

14. The lens module of claim 13 , wherein:
the lens group comprises a first lens, a second lens, a third lens, and a fourth lens sequentially stacked from an object side to the image side of the lens module.

15. The lens module of claim 14 , wherein:
the first angle α is 35°, and the second angle β is 34.7°.

16. The lens module of claim 15 , wherein:
a thickness of each of the plurality of somas is 0.16 mm.

Assignees

• Hon Hai Prec Ind Co Ltd

Inventors

• Feng ya-lan
• Ko Chun-Cheng

Classifications

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• G02B13/004 Primary

  having four lenses · CPC title

• G02B27/0018

  with means for preventing ghost images (anti-reflection coatings G02B1/11) · CPC title

• G02B5/22

  Absorbing filters {(G02B5/201 - G02B5/208 take precedence)} · CPC title

• G02B7/026

  using retaining rings or springs (G02B7/027 takes precedence) · CPC title