Patent Application
20200041750
The present disclosure relate to the field of optical imaging technologies, and in particular, to a light shading plate and a lens module including the same.
With the continuous development of technology, electronic devices become more and more intelligent. In addition to digital cameras, portable electronic devices such as tablet PC and mobile phones are also equipped with lens modules having a photographing function in order to meet the users' requirements to take photos at any time. In the related art, a lens module includes a lens and a light shading plate for blocking light.
The inventors have found that at least the following problems exist in the related art. In order to prevent stray light and light leakage, a light shading piece is assembled on a light shading plate. The arrangement of the light shading piece increases the process of assembling the light shading piece, thereby increasing the production cost. Furthermore, the light shading piece is liable to generate burrs during a process of assembling the light shading piece to the light shading plate, and the light shading piece and the light shading plate are easily assembled to be deviated, which affects the optical performance of the lens. Meanwhile, the light shading piece and the light shading plate may be displaced during the use, thereby resulting in a low stability of the lens module.
Many aspects of the exemplary embodiment can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
The present disclosure will be further illustrated with reference to the accompanying drawings and the embodiments.
In order to solve the above technical problems, the present disclosure provides a light shading plate 100. As shown in
Compared with the related art, the present embodiment provides the light shading arm 12 for shading light on the body 11, thereby preventing stray light and light leakage without additionally adding a light shading piece. This can reduce cost and also avoid the problem of the light shading piece being deviated during the assembling and the generating of the burr, thereby improving the optical performance of the lens module. Meanwhile, the displacement problem of the light shading piece and the light shading plate 100 during the use can be avoided, thereby improving the stability of the lens module.
In this embodiment, the light shading arm 12 includes a first light shading arm 121 and a second light shading arm 122. The first light shading arm 121 is provided at an edge of the inner peripheral surface 113 close to the object-side surface 111. The second light shading arm 122 is provided at an edge of the inner peripheral surface 113 close to the image-side surface 112. By providing the first light shading arm 121 closer to the lens, it can better prevent stray light from entering the lens. By providing the second light shading arm 122 closer to an opening of the lens barrel, it can better prevent stray light from entering the lens barrel, thereby improving the optical performance of the lens module.
It can be understood that the first light shading arm 121 and/or the second light shading arm 122 can also be provided at a middle position of the inner peripheral surface 113 as long as the effect of preventing stray light and light leakage can be achieved.
Optionally, the first light shading arm 121 includes a first surface 121a close to the image side, a second surface 121b opposite to the first surface 121a, and a first end surface 121c extending obliquely from a side of the second surface 121b close to the optical axis OO′ to the first surface 121a along a direction facing away from the optical axis OO′. The second light shading arm 122 includes a third surface 122a close to the image side, a fourth surface 122b opposite to the third surface 122a, and a second end surface 122c extending obliquely from a side of the fourth surface 122b close to the optical axis OO′ to the third surface 122a along a direction facing away from the optical axis OO′. A distance between the first end surface 121c and the optical axis OO′ is smaller than a distance between the second end surface 122c and the optical axis OO′. Since the light passing through the through hole of the light shading plate 100 is divergent, setting the distance between the first end surface 121c and the optical axis OO′ to be smaller than the distance between the second end surface 122c and the optical axis OO′ is more in line with an imaging rule of the lens module and can retain more light for imaging as much as possible, thereby improving the imaging quality of the lens module.
It should be noted that an extinction area is provided on the first surface 121a. Since the distance between the first end surface 121c and the optical axis OO′ is smaller than the distance between the second end surface 122c and the optical axis OO′, more stray light is reflected to the first surface 121a. Therefore, it can greatly prevent stray light from entering the lens by providing an extinction area on the first surface 121a.
In this embodiment, the first end surface 121c is provided with an extinction area. In this way, the stray light incident on the first end surface 121c can be better absorbed, so that stray light can be better prevented. Optionally, the second end surface 122c is provided with an extinction area. In this way, the stray light incident on the second end surface 122c can be better absorbed, so that stray light can be better prevented.
It can be understood that the first end surface 121c and/or the second end surface 122c may also extend along the optical axis OO′, and other surfaces of the first light shading arm 121 and the second light shading arm 122 can also be provided with the extinction area.
Optionally, the light shading arm and the body are formed into one piece. In this way, the body and the light shading arm can be simultaneously formed in one operation, which saves the manufacturing process, thereby saving production cost.
As shown in
It can be understood that the first light shading arm 121 can also be provided at a middle position of the inner peripheral surface 113, and the number of the light shading arms 12 can also be three or more, which can achieve the same technical effect and will not be elaborated herein.
A second embodiment of the present disclosure provides a lens module 300. As shown in
It can be understood that, as shown in
The above are only preferred embodiments of the present disclosure. Here, it should be noted that those skilled in the art can make modifications without departing from the inventive concept of the present disclosure, but these shall fall into the protection scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201821262983.6 | Aug 2018 | CN | national |
