LENS MODULE
Provided is a lens module, including a lens barrel having an optical axis, a lens accommodated in the lens barrel and a pressing ring. The lens includes a body portion for imaging and a peripheral portion extending around the body portion. The lens module has an imaging area, and a non-imaging area including the lens barrel, the peripheral portion and the pressing ring. The lens module further includes an extinction portion formed in the non-imaging area. A plurality of extinction bulges distributed in an array is formed by extending from a side of the extinction portion close to the optical axis towards the optical axis to, the plurality of extinction bulges being. An end surface of each of the plurality of extinction bulges close to the optical axis is an arc surface protruding in a direction facing away from the extinction portion.
1 . A lens module, comprising:
a lens barrel having an optical axis,
a lens received in the lens barrel;
a pressing ring disposed on an image side of the lens; and
an extinction portion,
wherein the lens comprises a body portion for imaging, and a peripheral portion extending around the body portion,
the lens module has an imaging area constituted by the body portion, and a non-imaging area, the non-imaging area comprising the lens barrel, the peripheral portion and the pressing ring,
the extinction portion is provided in the non-imaging area, and a plurality of extinction bulges is formed by extending from a side, close to the optical axis, of the extinction portion towards the optical axis, the plurality of extinction bulges being distributed in an array,
an end surface of each of the plurality of extinction bulges close to the optical axis is an arc surface protruding in a direction facing away from the extinction portion.
2 . The lens module as described in claim 1 , wherein the extinction portion and the plurality of extinction bulges are coated with a black coating.
3 . The lens module as described in claim 1 , wherein the extinction portion is disposed on the pressing ring.
4 . The lens module as described in claim 3 , wherein the pressing ring comprises an inner side surface around and facing towards the optical axis,
the inner side surface obliquely extends from an object side towards an image side in a direction facing away from the optical axis, and the extinction portion is disposed on the inner side surface.
5 . The lens module as described in claim 4 , wherein any two adjacent extinction bulges of the plurality of extinction bulges are spaced apart from each other.
6 . The lens module as described in claim 4 , wherein any two adjacent extinction bulges of the plurality of extinction bulges abut against each other.
7 . The lens module as described in claim 3 , wherein each of the plurality of extinction bulges is a cone having an arc-surface top.
8 . The lens module as described in claim 7 , wherein a projection of each of the plurality of extinction bulges on a plane parallel to the optical axis has a length of 10 μm to 30 μm.
9 . The lens module as described in claim 7 , wherein each of the plurality of extinction bulges has a vertex angle of 0° to 90°.
10 . The lens module as described in claim 7 , wherein a projection of each of the plurality of extinction bulges on a plane perpendicular to the optical axis is a circle having a diameter of 20 μm to 40 μm.
11 . The lens module as described in claim 7 , wherein a distance, on a plane perpendicular to the optical axis, between vertexes of any two adjacent extinction bulges of the plurality of extinction bulges is in a range from 20 μm to 100 μm.