IMAGING MODULE WITH FIXED-FOCUS LENS

• US 20110075021A1
• Filed: 04/07/2010
• Published: 03/31/2011
• Est. Priority Date: 09/30/2009
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: CHANG, JEN-TSORNG
• Granted Patent: US 8,773,572 B2
• Time in Patent Office: Days
• US Class Current: 348/374
• CPC Class Codes: G02B 7/022 lens and mount having complementary engagement means, e.g. screw/thread
• CPC Class Codes: G02B 7/025 using glue
• CPC Class Codes: H04N 23/55 Optical parts specially adapted for electronic image sensors; Mounting thereof
• CPC Class Codes: H04N 23/57 Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices

Abstract

An exemplary imaging module includes a substrate, an image sensor, a lens barrel, a lens, and a holder. The image sensor is fixed on the substrate, the lens barrel is connected to the substrate to enclose the image sensor, the lens is received in the lens barrel, and the holder is connected to the lens barrel and partially receives the lens barrel therein. The lens barrel includes an elastic protruding portion protruding from the inner surface thereof. The inner surface of the protruding portion elastically abuts a side surface of the lens.

Claims

1. An imaging module, comprising:

a substrate;

an image sensor fixed on the substrate;

a lens barrel connected to the substrate to enclose the image sensor, the lens barrel comprising an elastic protruding portion protruding from an inner surface thereof;

at least one lens received in the lens barrel, an inner surface of the protruding portion elastically abutting a side surface of the at least one lens; and

a holder connected to the lens barrel and partially receiving the lens barrel therein.

2. The imaging module of claim 1, wherein the substrate comprises a first surface and a second surface at opposite sides thereof.

3. The imaging module of claim 2, wherein the substrate comprises a plurality of first soldering pads formed on the first surface and a plurality of first connecting portions formed on the second surface, each first connecting portion is electrically connected to a corresponding to one of the first soldering pads, and the image sensor comprises a plurality of second soldering pads each connected to a corresponding first soldering pad.

4. The imaging module of claim 3, wherein the holder comprises a peripheral side wall, and the side wall partially receives the lens barrel therein.

5. The imaging module of claim 4, wherein the lens barrel defines a groove in an outer surface thereof, the side wall of the holder comprises an engaging portion on an inner surface corresponding to the groove of the lens barrel, and the engaging portion is engaged in the groove.

6. The imaging module of claim 4, wherein the holder further comprises a plurality of connecting members fixed on an end of the side wall thereof, each of the connecting members comprises a third soldering pad and a second connecting portion, the third soldering pad is fixed on the end of the side wall, one end of the second connecting portion is fixedly connected to the third soldering pad, and the other end of the second connecting portion abuts against a corresponding first connecting portion of the substrate in the holder.

7. The imaging module of claim 6, wherein each of the second connecting portions comprises a contacting section in contact with the corresponding first connecting portion, with the contacting section resiliently abutting against the corresponding first connecting portion.

8. The imaging module of claim 1, wherein the at least one lens comprises a central optical portion, and a supporting portion around the optical portion, the optical portion is formed as a convex lens for converging passing light, and the supporting portion is configured for supporting the optical portion in the lens barrel.

9. The imaging module of claim 8, wherein an outside diameter of the supporting portion gradually reduces from the object side to the image side of the imaging module, and a part of the supporting portion nearest the image side of the imaging module is received in the protruding portion of the lens barrel.

10. The imaging module of claim 1, further comprising an infrared filter, a first shielding member and a second shielding member, wherein the infrared filter is fixed in the lens barrel between the first shielding member and the image sensor, the first shielding member is fixed in the lens barrel between the infrared filter and the at least one lens, and the second shielding member is attached to the object side end of the at least one lens.

11. The imaging module of claim 1, wherein the at least one lens is further secured in position in the lens barrel by adhesive.

12. The imaging module of claim 11, wherein the adhesive interconnects the side surface of the at least one lens, the protruding portion, and the inner surface of the lens barrel.

18. The imaging module of claim 12, wherein an inside diameter of the adjusting section gradually reduces from the object side to the image side of the imaging module, and an end of the adjusting section nearest the object side of the imaging module is integrally connected to a main body of the protruding portion.

13. An imaging module, comprising:

a substrate;

an image sensor fixed on the substrate;

a lens barrel connected to the substrate to enclose the image sensor, the lens barrel comprising an elastic protruding portion protruding from an inner surface thereof, the protruding portion comprising an elastic adjusting section;

at least one lens received in the lens barrel, an inner surface of the adjusting section elastically abutting a side surface of the at least one lens; and

a holder connected to the lens barrel and partially receiving the lens barrel therein.

14. The imaging module of claim 13, wherein the at least one lens comprises a central optical portion, and a supporting portion around the optical portion, the optical portion is formed as a convex lens for converging passing light, and the supporting portion is configured for supporting the optical portion in the lens barrel.

15. The imaging module of claim 14, wherein an outside diameter of the supporting portion gradually reduces from the object side to the image side of the imaging module, and a part of the supporting portion nearest the image side of the imaging module is inserted in the elastic adjusting section of the protruding portion of the lens barrel.

16. The imaging module of claim 14, wherein the adjusting section defines a plurality adjusting grooves in the inner surface thereof, the adjusting grooves provide spans of different size as measured perpendicular to an optical axis of the imaging module, the different sized spans gradually reduce from an adjusting groove nearest to the object side of the imaging module to an adjusting groove nearest to the image side of the imaging module, the supporting portion of the lens is received in the adjusting section, and an inserted end of the supporting portion is engaged in at least one of the adjusting grooves.

17. The imaging module of claim 16, wherein the adjusting grooves are annular, and the inserted end of the supporting portion is engaged in one of the adjusting grooves.