Lens module

The present disclosure provides a lens module. The lens module includes a lens barrel; a lens group accommodated in the lens barrel, the lens group including at least a first lens; and a retaining member located an image side of the lens group. The retaining member is a hollow ring which includes an object side leaning and connecting to the first lens, an image side opposite to the object side, an outer side and an inner side connecting to the object side and the image side, and the inner side is a Lambertian surface through Lambertian treatment.

FIELD OF THE PRESENT DISCLOSURE

The present disclosure relates to optical imaging technology, especially for a lens module used for various electronic equipment.

DESCRIPTION OF RELATED ART

Recent years, with a development of imaging technology and an emerging of an electronic product with an imaging function, an optical imaging lens has been extensively applied in various products, and improved and optimized constantly. Currently, a direction of improving most of imaging lenses is how to make the imaging lens smaller and thinner, and choose a proper lens with a good degree of adaptability of optical characteristics while making the imaging lens smaller and thinner, and study how to integrate them together to guarantee a good imaging result. However, during current imaging, there is always unnecessary stray light entering into the lens that impacts the imaging quality, therefore, during manufacturing the lens, it is required to check the lens and remove the unnecessary stray light, and it is difficult to judge the path of the stray light in the lens module currently, therefore, the imaging quality of the lens is worse, and finding out the unnecessary stray light during imaging is a technical problem that needs to be solved urgently.

Therefore it is necessary to provide a lens module for overcoming the above-mentioned disadvantages.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

A first embodiment of the present disclosure relates to a lens module. As shown inFIGS. 1-2, the lens module includes a lens barrel1, a lens group2accommodated in the lens barrel1and a retaining member3set by an image side of the lens group2. In which, there are four pieces of lenses totally included in the lens group2disclosed by the present embodiment: a first lens24, a third lens23, a fourth lens22and a fifth lens21, and there are a first shading piece27and a shading board28between the first lens24and the third lens23, and there is a second shading piece26between the third lens23and the fourth lens22, and there is a third shading piece25between the fourth lens22and the fifth lens21.

Various lenses are all arranged along an optical axis N, and the amount of the lens in a lens group2can certainly increase and decrease by actual imaging requirement. A retaining member3is a hollow ring which includes an object side31, an image side32and an outer side33and an inner side34connecting the object side31and the image side32, and a lens barrel includes an inner wall11and an outer wall12, and the inner wall11and the outer wall12are set oppositely. The object side31is leaned and connected to the lens24, and the image side32and the object side31are set oppositely, and the outer side33is leaned and connected to the inner wall11of a lens barrel1, and the inner side34and the outer side33are set oppositely, and the inner side34is a Lambertian surface facing towards an optical axis N through Lambertian processing, including but not limited to the Lambertian processing of the inner side34, in order to make it become a Lambertian body.

Through above content, it is not difficult to find out that, after completing the Lambertian processing to an inner side34of a retaining member3facing towards an optical axis N, after the incident light enters, it can diffuse the reflection light irregularly, in order to reduce the energy of the reflection light, and decrease the interference to an optical system by the reflection light, and improve a ghost image and sparkle and improve the imaging quality of the whole lens module.

Specifically, as shown inFIG. 2, the inner side34is an arc, which is to increase an area of the inner side34, after the incident light enters, it can diffuse the reflection light irregularly, in order to reduce the energy of the reflection light, and decrease the interference to an optical system by the reflection light, and improve a ghost image and sparkle and improve the imaging quality of the whole lens module.

Besides, as shown inFIG. 2, the inner side34is an arc projecting towards a direction of an optical axis N. When the incident light enters, it can diffuse the reflection light irregularly, in order to reduce the energy of the reflection light, and decrease the interference to an optical system by the reflection light, and improve a ghost image and sparkle and improve the imaging quality of the whole lens module.

Besides, as shown inFIGS. 1-2, a vertical distance from one end of the inner side34near an object side31to the optical axis N is less than a vertical distance from one end of an the inner side34near an object side32to the optical axis N. The object side31is leaned to a lens group2, and a width of an object side31is more than the width of the image side32, in order to make a retaining member3retain a lens group2in a lens barrel1stably.

In addition, like the inner side34of the retaining member3, complete Lambertian processing to the object side31, the image side32and the outer side33of the retaining member and make them become Lambertian surfaces, in order to decrease the interference to an optical system by the reflection light, and improve a ghost image and sparkle and improve the imaging quality of the whole lens module.

A second embodiment of this disclosure relates to a kind of lens module. The second embodiment is roughly the same as the first embodiment, the key difference lies in that: in a first embodiment, an inner side34is an arc projecting towards a direction of an optical axis N. However, in this embodiment, as shown inFIG. 3, the inner side35is an arc away from the direction of the optical axis N. When the incident light enters, it can diffuse the reflection light irregularly, in order to reduce the energy of the reflection light, and decrease the interference to an optical system by the reflection light, and improve a ghost image and sparkle and improve the imaging quality of the whole lens module.

A third embodiment of this disclosure relates to a kind of lens module. The third embodiment is roughly the same as a second embodiment, and the key difference lies in that: in this embodiment, as shown inFIG. 4, an image side36is a plane, and its structure is simpler, and it is more convenient for production and manufacture.

A fourth embodiment of this disclosure relates to a kind of lens module. The second embodiment is roughly the same as the first embodiment, the key difference lies in that: in the first embodiment, a vertical distance from one end of an inner side34near an object side31to an optical axis N is less than a vertical distance from one end of an the inner side34near an object side32to the optical axis N. However, in this embodiment, as shown inFIG. 5, the vertical distance from one end of the inner side44of a retaining member4near the object side41to the optical axis N is equal to the vertical distance from one end of the inner side44near an object side42to the optical axis N.

In other embodiment, a lens module can also be further set in at least one second lens by an object side of the first lens in the lens barrel, and the second lens is arranged with the first lens along an optical axis.

In other embodiment, as actually required, the amount of the lens included in the lens group can be any number more than or equal to 1, and a fixing component can also be any number more than or equal to 1, and above bonding structure can be used for bonding and fixing between other fixing components and a lens barrel or by other method.