CN102929080B - Camera module - Google Patents

Abstract

A kind of camera module, it includes camera lens, with the substrate of this camera lens secure fit, is installed in the CIS of this substrate.This camera lens includes lens barrel and is arranged on the eyeglass in this lens barrel, and this camera lens has an optical axis.This substrate has relative first surface and second surface, and the first inclined-plane between this first surface and this second surface.This first inclined-plane is relative to this inclined light shaft.This substrate offers the through hole running through this first surface and this second surface, and this first inclined-plane is around this through hole.This substrate is between this camera lens and this CIS, and the effective photosensitive district of this CIS is positioned at this through hole.In the camera module that the present invention provides, major part light cannot arrive effective photosensitive area of this CIS after the first slant reflection, thus after decreasing the reflection of via through holes inwall, be projected to the light of described effective photosensitive area, and then decrease the reflection light stricture of vagina in the image of imaging.

Description

camera module

technical field

The invention relates to the technical field of optical imaging, in particular to a camera module.

Background technique

The camera module includes a lens barrel, a lens group arranged in the lens barrel, a substrate and an image sensor arranged on the substrate. The substrate is provided with through holes penetrating through the upper and lower surfaces. The through hole allows light to pass through to the image sensor for imaging.

In a traditional camera module, the inner wall of the through hole is generally a vertical wall, and some light is easily reflected by the inner wall of the through hole to the effective photosensitive area of the image sensor, resulting in serious reflected light streaks in the imaged image.

Contents of the invention

In view of this, it is necessary to provide a camera module capable of reducing reflection light streaks.

A camera module includes a lens, a substrate fixedly matched with the lens, and an image sensor fixed on the substrate. The lens includes a lens barrel and a lens arranged in the lens barrel, and the lens has an optical axis. The substrate has opposite first and second surfaces, and a first slope between the first and second surfaces. The first slope is inclined relative to the optical axis. The substrate is opened with a through hole passing through the first surface and the second surface, and the first slope surrounds the through hole. The substrate is located between the lens and the image sensor, and the effective photosensitive area of the image sensor is located in the through hole.

In the camera module provided by the present invention, since the effective photosensitive area of the image sensor is located in the through hole, and the substrate has the first slope surrounding the through hole, most of the light cannot reach the image sensor after being reflected by the first slope. The effective photosensitive area of the detector, thereby reducing the light projected to the effective photosensitive area after being reflected by the inner wall of the through hole, thereby reducing the reflected light streaks in the imaged image.

Description of drawings

FIG. 1 is a schematic cross-sectional view of a camera module according to a first embodiment of the present invention, and the camera module includes a substrate.

FIG. 2 is a schematic perspective view of the substrate in FIG. 1 .

3 is a schematic cross-sectional view of a camera module according to a second embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a camera module according to a third embodiment of the present invention.

Description of main component symbols

camera module 10, 20, 30 lens barrel 11 first lens 12 second lens 13 Shading film 14 lens 15 Substrate 16 image sensor 18 first surface 161 second surface 162 first slope 163 groove 164 through hole 165 second slope 166 stepped protrusion 167 photosensitive surface 181 Effective photosensitive area 182

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to FIGS. 1-2 , the camera module 10 according to the first embodiment of the present invention includes a lens barrel 11 , a first lens 12 , a second lens 13 , a light-shielding film 14 , a substrate 16 , and an image sensor 18 .

The first lens 12 , the second lens 13 and the shading sheet 14 are accommodated in the lens barrel 11 , and the shading sheet 14 is located between the first lens 12 and the second lens 13 . The lens barrel 11 , the first lens 12 , the second lens 13 and the shading sheet 14 together form a lens 15 . The lens has an optical axis 152 .

The substrate 16 has opposite first surface 161 and second surface 162, a first slope 163 directly connected to the first surface 161 and the second surface 162, a groove 164 is provided on the second surface 162, and a channel communicating with the groove 164 Hole 165. The first slope 163 is inclined toward the image side relative to the optical axis 152 and surrounds the through hole 165 . The first surface 161 of the substrate 16 can be attached to the lower end surface of the lens barrel 11 by means of glue or the like. In this embodiment, the cross section of the through hole 165 is a rectangle. In this embodiment, the substrate 16 is a ceramic substrate.

The image sensor 18 is fixed in the groove 164 by glue or the like, and the effective photosensitive area 182 of the image sensor 18 is located in the through hole 165 of the substrate 16 . The effective photosensitive area 182 has a photosensitive surface 181 . The vertical distance between the first surface 161 of the substrate 16 and the photosensitive surface 181 is D.

It can be understood that in other implementation manners, the first slope 163 may also face the image side.

Since the effective photosensitive area 182 is located in the through hole 165 , and most light rays cannot reach the effective photosensitive area 182 after being reflected by the first inclined surface 163 , thereby reducing reflected light streaks in the formed image.

Preferably, the width W of the orthographic projection of the first slope 163 along the optical axis 152 is greater than 0.27D/8000, which can further reduce reflected light streaks in the imaged image.

FIG. 3 shows the camera module 20 according to the second embodiment of the present invention. The difference between the camera module 20 and the camera module 10 according to the first embodiment is that a plurality of stepped protrusions 167 are provided on the first slope 163 . In this embodiment, the height H of each step is the same, and H is greater than D/1000. In other embodiments, the height H of each step may also be different, but the height H of each step is greater than D/1000. By disposing a plurality of stepped protrusions 167 on the first slope 163 , the light reflected by the first slope 163 and reaching the effective photosensitive area can be further reduced.

4 is a camera module 30 of the third embodiment of the present invention. The difference between the camera module 30 and the camera module 10 of the first embodiment is that the substrate 16 further includes a second slope 166, and the second slope 166 is opposite to the The optical axis 152 is inclined, and the second inclined surface 166 surrounds the through hole 165 . The first slope 163 is connected to the first surface 161 and faces toward the object side. The second slope 166 is connected between the first slope 163 and the second surface 162 and faces toward the image side.

It can be understood that, in other embodiments, a plurality of stepped protrusions 167 as shown in FIG. 3 may also be provided on the first slope 163 and/or the second slope 166 .

In the camera module provided by the present invention, since the effective photosensitive area of the image sensor is located in the through hole, and the substrate has the first slope surrounding the through hole, most of the light cannot reach the image sensor after being reflected by the first slope. The effective photosensitive area of the detector, thereby reducing the light projected to the effective photosensitive area after being reflected by the inner wall of the through hole, thereby reducing the reflected light streaks in the imaged image.

In addition, those skilled in the art can also make other changes within the spirit of the present invention. Of course, these changes made according to the spirit of the present invention should be included within the scope of protection claimed by the present invention.

Claims (7)

1. A camera module, characterized in that it comprises: A lens, the lens includes a lens barrel and a lens arranged in the lens barrel, the lens has an optical axis; a base plate fixedly fitted with the lens, the base plate has an opposite first surface and a second surface, and a first slope between the first surface and the second surface, the first slope is inclined relative to the optical axis, The substrate is opened with a through hole passing through the first surface and the second surface, and the first slope surrounds the through hole; and an image sensor fixed on the substrate, the substrate is located between the lens and the image sensor, and the effective photosensitive area of the image sensor is located in the through hole, the effective photosensitive area has a photosensitive surface, The vertical distance between the first surface and the photosensitive surface is D, and the width of the orthographic projection of the first slope along the optical axis is larger than 0.27D/8000. 2. The camera module according to claim 1, wherein the first slope is directly connected between the first surface and the second surface. 3 . The camera module according to claim 2 , wherein the first slope faces the image side or the object side. 4 . 4. The camera module according to claim 2, wherein a plurality of stepped protrusions are arranged on the first slope. 5. The camera module according to claim 4, wherein the height of each step is larger than D/1000. 6. The camera module according to claim 1, wherein the substrate further comprises a second slope, the second slope is inclined relative to the optical axis, and the second slope surrounds the through hole; the first slope and The first surface is connected and faces the object side, and the second slope is connected between the first slope and the second surface and faces the image side. 7 . The camera module according to claim 1 , wherein a groove is formed on the second surface, the groove communicates with the through hole, and the image sensor is disposed in the groove.