CN102929078A

CN102929078A - Camera module

Info

Publication number: CN102929078A
Application number: CN2011102299103A
Authority: CN
Inventors: 李俊佑
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2011-08-11
Filing date: 2011-08-11
Publication date: 2013-02-13
Anticipated expiration: 2031-08-11
Also published as: CN102929078B

Abstract

The invention discloses a camera module, which comprises a lens, a substrate fixedly matched with the lens, and an image sensor fixedly arranged on the substrate, wherein the lens comprises a lens cone and a lens arranged inside the lens cone; the lens comprises an optical axis; the substrate comprises opposite first surface and second surface, and a through hole penetrating through the first surface and the second surface; the substrate further comprises an inner side encircling the through hole; the substrate is arranged between the lens and the image sensor; an effective photosensitive area of the image sensor is arranged inside the through hole; the height of the area with reflected ray on the inner side in the optical axis direction is D; the effective photosensitive area is a rectangle; the cross section of the through hole is also a rectangle; a long edge of the effective photosensitive area is parallel to the long edge of the cross section of the through hole; the distance between the long edge of the effective photosensitive area and the long edge of corresponding through hole is greater than 0.27D, and the distance between a short edge of the effective photosensitive area and the short edge of corresponding through hole is greater than 0.27D.

Description

The camera module

Technical field

The present invention relates to the optical image technology field, relate in particular to a kind of camera module.

Background technology

The camera module comprises lens barrel, is arranged on the lens set in the lens barrel, substrate and be arranged on the image sensor of substrate.Offer on the substrate and run through the up and down through hole on two surfaces.Thereby through hole allows light by arriving at the image sensor imaging.

In traditional camera module, some light are easily reflexed to effective photosensitive area of image sensor by the inwall of through hole, thereby produce serious reflected light line in the image of imaging.

Summary of the invention

In view of this, be necessary to provide a kind of and can reduce the camera module that produces the reflected light line.

A kind of camera module, it comprises camera lens, with the substrate of this camera lens secure fit, is installed in the image sensor on this substrate.This camera lens comprises lens barrel and is arranged on eyeglass in this lens barrel, and this camera lens has an optical axis.This substrate has relative first surface and second surface, and runs through the through hole of this first surface and this second surface.This substrate further comprises the medial surface around this through hole.This substrate is between this camera lens and this image sensor, and effective photosensitive area of this image sensor is positioned at this through hole.The height of zone on this optical axis direction that light reflection occurs in this medial surface is D.This effective photosensitive area is rectangle, and the xsect of this through hole is rectangle.The long limit of this effective photosensitive area is parallel with the long limit on this through hole xsect.Distance between the long limit of the long limit of this effective photosensitive area and corresponding through hole is all greater than 0.27D, and the distance between the minor face of the minor face of this effective photosensitive area and corresponding through hole is all greater than 0.27D.

In the camera module provided by the invention, by the position relationship of effective photosensitive area and through hole is set according to above-mentioned requirements, after reflecting through through-hole wall, most of light can't arrive effective photosensitive area of this image sensor, thereby be projected to the light of described effective photosensitive area after having reduced via through holes inwall reflection, and then reduced the reflected light line in the image of imaging.

Description of drawings

Fig. 1 is the camera module diagrammatic cross-section of first embodiment of the invention, and this camera module comprises substrate and image sensor.

Fig. 2 is the position relationship schematic diagram of effective photosensitive area of the through hole of the substrate among Fig. 1 and image sensor.

Fig. 3 is the position relationship schematic diagram of the areas imaging of the through hole of the camera module of second embodiment of the invention, effective photosensitive area and camera lens.

The main element symbol description

The camera module	10
		Lens barrel	11
The first eyeglass	12
		The second eyeglass	13
Anti-dazzling screen	14
		Camera lens	15
Substrate	16
		Infrared fileter	17
Image sensor	18
		Optical axis	152
First surface	161
		Second surface	162
The first groove	163
		The second groove	164
Through hole	165
		Medial surface	167
Effective photosensitive area	182
		Long limit	1821，1651
Minor face	1822，1652
		Areas imaging	151

Following embodiment further specifies the present invention in connection with above-mentioned accompanying drawing.

Embodiment

Below in conjunction with drawings and the embodiments the present invention is described in further detail.

See also Fig. 1-2, the camera module 10 of first embodiment of the invention comprises lens barrel 11, the first eyeglasses 12, the second eyeglasses 13, anti-dazzling screen 14, infrared fileter 17, substrate 16, and image sensor 18.

The first eyeglass 12, the second eyeglasses 13 and anti-dazzling screen 14 are housed in the lens barrel 11, and anti-dazzling screen 14 is between the first eyeglass 12 and the second eyeglass 13.Lens barrel 11, the first eyeglasses, 12, the second eyeglasses 13 and the anti-dazzling screen 14 common camera lenses 15 that form.Camera lens 15 has optical axis 152.

Substrate 16 has relative first surface 161 and second surface 162, offers the first groove 163 on the first surface 161, offers the second groove 164 on the second surface 162, and is communicated with the through hole 165 of the first groove 163, the second groove 164.Substrate 16 further comprises the medial surface 167 around this through hole 165.The height of zone on optical axis 152 directions that light reflection occurs in the medial surface 167 is D, and in the present embodiment, whole medial surface 167 all can reflect, so D is the height of medial surface 167 on optical axis 152 directions.The first surface 161 of substrate 16 can stick on by modes such as glue the lower surface of lens barrel 11.In the present embodiment, the xsect of through hole 165 is rectangle.Infrared fileter 17 is bonded in the first groove 163 by modes such as glue.In the present embodiment, substrate 16 is ceramic substrate.

Image sensor 18 is fixed in the second groove 164 by modes such as scolding tin, and effective photosensitive area 182 of image sensor 18 is positioned at the through hole 165 of substrate 16.In the present embodiment, effectively photosensitive area 182 be rectangle, and the limit corresponding with through hole 165 is parallel respectively on each bar limit of effective photosensitive area 182.

The long limit 1821 of effective photosensitive area 182 with the long limit 1651(of corresponding through hole 165 is, the limit adjacent with the long limit 1821 of effective photosensitive area 182) distance L between is all greater than 0.27D, effectively the minor face 1652(of the minor face 1822 of photosensitive area 182 and corresponding through hole 165 namely, the limit adjacent with the minor face 1822 of effective photosensitive area 182) between apart from S all greater than 0.27D.

Preferably, the areas imaging 151 of camera lens 15 is positioned at through hole 165, as shown in Figure 3.In the present embodiment, this design is to realize by the size that increases through hole 165.Certainly, under the prerequisite of the size that does not change through hole 165, the size of optics section that also can be by reducing the first eyeglass 12, the second eyeglass 13 is dwindled the areas imaging 151 of camera lens 15, thereby so that areas imaging 151 is positioned at through hole 165.By such design, there is no that light can arrive through hole 165 inwalls, thereby basically can eliminate the reflected light line in the image of imaging.In the present embodiment, areas imaging 151 is border circular areas.

In addition, those skilled in the art can also do other variation in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.

Claims

1. a camera module is characterized in that, it comprises:

Camera lens, this camera lens comprises lens barrel and is arranged on eyeglass in this lens barrel, and this camera lens has an optical axis;

With the substrate of this camera lens secure fit, this substrate has relative first surface and second surface, and runs through the through hole of this first surface and this second surface, and this substrate further comprises the medial surface around this through hole, and the xsect of this through hole is rectangle; And

Be installed in the image sensor on this substrate, this substrate is between this camera lens and this image sensor, and effective photosensitive area of this image sensor is positioned at this through hole, the height of zone on optical axis direction that light reflection occurs in this medial surface is D, this effective photosensitive area is rectangle, the long limit of this effective photosensitive area is parallel with the long limit on this through hole xsect, distance between the long limit of the long limit of this effective photosensitive area and corresponding through hole is all greater than 0.27D, and the distance between the minor face of the minor face of this effective photosensitive area and corresponding through hole is all greater than 0.27D.

2. camera module as claimed in claim 1 is characterized in that, the areas imaging of this camera lens is positioned at this through hole.

3. camera module as claimed in claim 1 is characterized in that, this substrate is ceramic substrate.

4. camera module as claimed in claim 1 is characterized in that, further comprises infrared fileter, and this first surface offers the first groove, and this first groove and this through hole connect, and this infrared fileter is arranged in this first groove.

5. camera module as claimed in claim 1 is characterized in that, this second surface offers the second groove, and this second groove and this through hole connect, and this image sensor is arranged in this second groove.

6. camera module as claimed in claim 1 is characterized in that, this lens barrel comprises one towards the lower surface of this first surface, and this lower surface is attached on this first surface.