Optical imaging module, camera module and electronic device

Patent metadata

Field	Value
Publication number	US-2024288670-A1
Application number	US-202318142262-A
Country	US
Kind code	A1
Filing date	May 2, 2023
Priority date	Feb 24, 2023
Publication date	Aug 29, 2024
Grant date	—

Abstract

An optical imaging module includes an imaging lens assembly, an optical path folding element, and a light-blocking element. The imaging lens assembly includes at least one optical lens element. The optical path folding element is disposed at an image side of the imaging lens assembly, and the optical path folding element has a light incident surface, a light exiting surface, and at least one optical reflective surface. The light-blocking element is disposed opposite to the at least one optical reflective surface, and the light-blocking element includes an interval area that maintains a distance from the optical path folding element. The at least one optical reflective surface is an optical total reflection surface configured to totally internally reflect imaging light of the optical imaging module in the optical path folding element. The interval area of the light-blocking element and the optical total reflection surface form an air slit therebetween.

First claim

What is claimed is:

1 . An optical imaging module, comprising:
an imaging lens assembly, comprising at least one optical lens element; an optical path folding element, disposed at an image side of the imaging lens assembly, wherein the optical path folding element has a light incident surface, a light exiting surface, and at least one optical reflective surface; and a light-blocking element, disposed opposite to the at least one optical reflective surface of the optical path folding element, wherein the light-blocking element comprises an interval area that maintains a distance from the optical path folding element; wherein the at least one optical reflective surface is an optical total reflection surface that is configured to totally internally reflect imaging light of the optical imaging module in the optical path folding element; and wherein the interval area of the light-blocking element and the optical total reflection surface form an air slit therebetween.

2 . The optical imaging module according to claim 1 , wherein the air slit is in air communication with outside at a position where the light-blocking element is located close to the light exiting surface.

3 . The optical imaging module according to claim 1 , wherein the light-blocking element further comprises a fixed area, an adhesive member is disposed on the fixed area, and the adhesive member is configured to fix the light-blocking element to the optical path folding element.

4 . The optical imaging module according to claim 3 , wherein an area of the fixed area of the light-blocking element coated with the adhesive member is Ab, a total area of the light-blocking element is As, and the following condition is satisfied:
0.05<Ab/As<0.65.

5 . The optical imaging module according to claim 4 , wherein the area of the fixed area of the light-blocking element coated with the adhesive member is Ab, the total area of the light-blocking element is As, and the following condition is satisfied:
0.10<Ab/As<0.60.

6 . The optical imaging module according to claim 1 , wherein a height of the optical path folding element along a direction of an optical axis of the optical imaging module is H, and the following condition is satisfied:
1 [mm]<H<5 [mm].

7 . The optical imaging module according to claim 1 , wherein a width of the air slit is d, and the following condition is satisfied:
0.002 [mm]<d<0.10 [mm].

8 . The optical imaging module according to claim 7 , wherein the width of the air slit is d, and the following condition is satisfied:
0.005 [mm]<d<0.07 [mm].

9 . The optical imaging module according to claim 1 , wherein a width of the air slit is d, a thickness of the light-blocking element is t, and the following condition is satisfied:
0.03<d/t<7.50.

10 . The optical imaging module according to claim 1 , wherein the light-blocking element and the optical path folding element physically abut on each other.

11 . The optical imaging module according to claim 1 , wherein the light-blocking element further comprises a cut opening that corresponds to the at least one optical reflective surface, and the cut opening is connected to the interval area.

12 . The optical imaging module according to claim 1 , wherein an area of the light-blocking element corresponding to the air slit is Aa, a total area of the light-blocking element is As, and the following condition is satisfied:
0.10<Aa/As<0.90.

13 . The optical imaging module according to claim 12 , wherein the area of the light-blocking element corresponding to the air slit is Aa, the total area of the light-blocking element is As, and the following condition is satisfied:
0.15<Aa/As<0.85.

14 . An optical imaging module, comprising:
an imaging lens assembly, comprising at least one optical lens element; an optical path folding element, disposed at an image side of the imaging lens assembly, wherein the optical path folding element has a light incident surface, a light exiting surface, and at least one optical reflective surface; and a light-blocking element, disposed opposite to the at least one optical reflective surface of the optical path folding element, wherein the light-blocking element comprises an interval area that maintains a distance from the optical path folding element; wherein the light-blocking element further comprises a fixed area, an adhesive member is disposed on the fixed area, and the adhesive member is configured to fix the light-blocking element to the optical path folding element; wherein the interval area of the light-blocking element and the at least one optical reflective surface of the optical path folding element form an air slit therebetween.

15 . The optical imaging module according to claim 14 , wherein an area of the fixed area of the light-blocking element coated with the adhesive member is Ab, a total area of the light-blocking element is As, and the following condition is satisfied:
0.05<Ab/As<0.65.

16 . The optical imaging module according to claim 15 , wherein the area of the fixed area of the light-blocking element coated with the adhesive member is Ab, the total area of the light-blocking element is As, and the following condition is satisfied:
0.10<Ab/As<0.60.

17 . The optical imaging module according to claim 14 , wherein a height of the optical path folding element along a direction of an optical axis of the optical imaging module is H, and the following condition is satisfied:
1 [mm]<H<5 [mm].

18 . The optical imaging module according to claim 14 , wherein a width of the air slit is d, a thickness of the light-blocking element is t, and the following condition is satisfied:
0.03<d/t<7.50.

19 . The optical imaging module according to claim 14 , wherein the light-blocking element further comprises a cut opening that corresponds to the at least one optical reflective surface, and the cut opening is connected to the interval area.

20 . The optical imaging module according to claim 14 , wherein the air slit is in air communication with outside at a position where the light-blocking element is located close to the light exiting surface.

21 . The optical imaging module according to claim 14 , wherein an area of the light-blocking element corresponding to the air slit is Aa, a total area of the light-blocking element is As, and the following condition is satisfied:
0.10<Aa/As<0.90.

22 . The optical imaging module according to claim 21 , wherein the area of the light-blocking element corresponding to the air slit is Aa, the total area of the light-blocking element is As, and the following condition is satisfied:
0.15<Aa/As<0.85.

23 . An optical imaging module, comprising:
an imaging lens assembly, comprising at least one optical lens element; an optical path folding element, disposed at an image side of the imaging lens assembly, wherein the optical path folding element has a light incident surface, a light exiting surface, and at least one optical reflective surface; and a light-blocking element, disposed opposite to the at least one optical reflective surface of the optical path folding element, wherein the light-blocking element comprises an interval area that maintains a distance from the optical path folding element; wherein the interval area of the light-blocking element and the at least one optical reflective surface of the optical path folding element form an air slit therebetween, a width of the air slit is d, and the following cond

Assignees

• Largan Precision Co Ltd

Inventors

• Tung Wei-Che
• Chang Lin An
• Chou Ming-Ta
• Lin Cheng-Feng

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

• G02B27/0018

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

• G03B11/00

  Filters or other obturators specially adapted for photographic purposes · CPC title

• G02B13/0065 Primary

  having a beam-folding prism or mirror · CPC title

• G02B13/001 Primary

  Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras (G02B23/243 takes precedence) · CPC title