CN102929079A

CN102929079A - Camera module

Info

Publication number: CN102929079A
Application number: CN2011102298971A
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

Abstract

The invention discloses a camera module, which comprises a lens, a substrate fixedly matched with the lens, an anti-dazzling screen arranged between the lens and the substrate, 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 surfaces, and a first through hole penetrating through the first surface and the second surface; the anti-dazzling screen comprises opposite third surface and fourth surface, and a second through hole penetrating through the third surface and the fourth surface; the substrate is arranged between the anti-dazzling screen and the image sensor; an effective photosensitive area of the image sensor is arranged inside the second through hole, and the boundary of the second through hole along a positive projection of an optical axis is arranged inside the boundary of the first through along the positive projection of the optical axis. The camera module provided by the invention can reduce rays projected to the effective photosensitive area after being reflected through the inner wall of the first through hole and the inner wall of the second through hole. Thus, reflected light patterns in the imaged image are reduced.

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 image sensor on the 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 arranged on the anti-dazzling screen between this camera lens and this substrate, is installed in the image sensor of 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 first through hole of this first surface and this second surface.This anti-dazzling screen comprises the 3rd relative surface and the 4th surface, and runs through second through hole on the 3rd surface and the 4th surface.This substrate is between this anti-dazzling screen and this image sensor.Effective photosensitive area of this image sensor is positioned at this second through hole, and the second through hole is positioned at the first through hole within the border of optical axis orthogonal projection along the border of optical axis orthogonal projection.

In the camera module provided by the invention, by the position relationship of effective photosensitive area, the first through hole and the second through hole is set according to above-mentioned requirements, after reflecting through the second through-hole wall, part light can't arrive effective photosensitive area of this image sensor, and can reduce the light that arrives the first through-hole wall, be projected to the light of described effective photosensitive area thereby reduced after the reflection of the first through-hole wall and the second through-hole wall, 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, the second anti-dazzling screen and image sensor.

Fig. 2 is the position relationship schematic diagram of effective photosensitive area of second through hole of the first through hole, the second anti-dazzling screen of the substrate among Fig. 1 and image sensor.

Fig. 3 is the schematic perspective view of the second anti-dazzling screen of Fig. 1.

Fig. 4 is the diagrammatic cross-section of the second anti-dazzling screen of second embodiment of the invention.

The main element symbol description

The camera module	10
		Lens barrel	11
The first eyeglass	12
		The second eyeglass	13
The first anti-dazzling screen	14
		Camera lens	15
Substrate	16
		The second anti-dazzling screen	17，17a
Image sensor
		18
First surface			161
	Second surface	162
The 3rd surface			172
	The 4th surface	173
Medial surface			174
	The first groove	163
The second groove			164
	The first through hole	165
The second through hole			171
	Effective photosensitive area	182
Chamfering			175，175a
	The first through hole is along the border of optical axis orthogonal projection	1651
The second through hole is along the border of optical axis orthogonal projection			1711
	Optical axis	152

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. 1-3, the camera module 10 of first embodiment of the invention comprises lens barrel 11, the first eyeglasses 12, the second eyeglasses 13, the first anti-dazzling screens 14, the second anti-dazzling screens 17, substrate 16, and image sensor 18.

The first eyeglass 12, the second eyeglasses 13 and the first anti-dazzling screen 14 are housed in the lens barrel 11, and the first 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 first anti-dazzling screen 14 common camera lenses 15 that form, camera lens has an 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 first through hole 165 of the first groove 163, the second groove 164.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 the first through hole 165 is rectangle.The second anti-dazzling screen 17 is bonded in the first groove 163 by modes such as glue.In the present embodiment, substrate 16 is ceramic substrate.

The second anti-dazzling screen 17 is cuboid.These the second anti-dazzling screen 17 inside offer the second through hole 171.This second anti-dazzling screen comprises that the 3rd surface 172 towards described thing side, is connected to the medial surface 174 between described the 3rd surface and the 4th surface towards the 4th surface 173 and as side.This medial surface 174 is around this second through hole 171.In the present embodiment, the 3rd surface 172 and medial surface 174 intersections are provided with a chamfering 175, and chamfering 175 is chamfer.In the present embodiment, the xsect of the second through hole 171 is rectangle.Chamfering 175 can reduce after 174 reflections of described medial surface and is projected to the light of image sensor 18, thereby has reduced the reflected light line in the image of imaging.

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 second through hole 171.The second through hole 171 is positioned at the first through hole 165 within the border 1651 of optical axis 152 orthogonal projection along the border 1711 of optical axis 152 orthogonal projection.In the present embodiment, effectively the xsect of photosensitive area 182 is rectangle.

Be appreciated that in other embodiments, chamfering 175 also can be arranged on the 4th surface 173 and medial surface 174 intersections.

As shown in Figure 4, be the second anti-dazzling screen 17a of the second embodiment in the described camera module 10, the difference of the second anti-dazzling screen 17 of the second anti-dazzling screen 17a and the first embodiment is: chamfering 175a is circular arc chamfering.

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 first through hole of this first surface and this second surface;

Be arranged on the anti-dazzling screen between this camera lens and this substrate, this anti-dazzling screen comprises the 3rd relative surface and the 4th surface, and runs through second through hole on the 3rd surface and the 4th surface; And

Be installed in the image sensor of this substrate, this substrate is between this anti-dazzling screen and this image sensor, and effective photosensitive area of this image sensor is positioned at the second through hole of this anti-dazzling screen, and this second through hole is positioned at this first through hole within the border of this optical axis orthogonal projection along the border of this optical axis orthogonal projection.

2. camera module as claimed in claim 1 is characterized in that, this anti-dazzling screen comprises that also one is connected to the medial surface between the 3rd surface and the 4th surface, and this medial surface is around this second through hole, and the 3rd surface and this medial surface intersection are provided with a chamfering.

3. camera module as claimed in claim 2 is characterized in that, this chamfering is chamfer or circular arc chamfering.

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

5. camera module as claimed in claim 1 is characterized in that, this first surface offers the first groove, and this first groove and this first through hole connect, and this anti-dazzling screen is arranged in this first groove.

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