LIGHT SHADING PLATE AND LENS MODULE INCLUDING THE SAME
The present disclosure relate to the field of optical imaging technologies, and provides a light shading plate and a lens module including the same. The light shading plate includes: a body for fixedly shading light; and a light shading arm for shading light. The body includes an object-side surface close to an object side, an image side surface opposite to the object-side surface, and an inner peripheral surface connecting the object-side surface with the image-side surface and being close to an optical axis. The light shading arm extends from the inner peripheral surface in a direction facing towards an optical axis. The light shading plate and the lens module including the light shading plate provided by the present disclosure can prevent stray light and light leakage, reduce production cost, and improve optical performance and stability of the lens module.
1 . A light shading plate, comprising:
a body for fixedly shading light; and
a light shading arm for shading light,
wherein the body comprises an object-side surface close to an object side, an image side surface opposite to the object-side surface, and an inner peripheral surface connecting the object-side surface with the image-side surface and being close to an optical axis; and the light shading arm extends from the inner peripheral surface in a direction facing towards an optical axis.
2 . The light shading plate as described in claim 1 , wherein the light shading arm comprises a first light shading arm and a second light shading arm; the first light shading arm is provided on an edge of the inner peripheral surface close to the object-side surface; and the second light shading arm is provided on an edge of the inner peripheral surface close to the image-side surface.
3 . The light shading plate as described in claim 2 , wherein the first light shading arm comprises a first surface close to the image side, a second surface opposite to the first surface, and a first end surface extending obliquely from a side of the second surface close to the optical axis to the first surface along a direction facing away from the optical axis; the second light shading arm comprises a third surface close to the image side, a fourth surface opposite to the third surface, and a second end surface extending obliquely from a side of the fourth surface close to the optical axis to the third surface along a direction facing away from the optical axis; and a distance between the first end surface and the optical axis is smaller than a distance between the second end surface and the optical axis.
4 . The light shading plate as described in claim 3 , wherein the first surface is provided with an extinction area.
5 . The light shading plate as described in claim 4 , wherein the first end surface is provided with an extinction area.
6 . The light shading plate as described in claim 5 , wherein the second end surface is provided with an extinction area.
7 . The light shading plate as described in claim 1 , wherein the light shading arm and the body are formed into one piece.
8 . A lens module, comprising:
a lens barrel having a receiving space; and
an optical assembly received in the receiving space,
wherein the optical assembly comprises a first lens close to an object side, a second lens provided at an image side of the first lens, a third lens provided at an image side of the second lens, a fourth lens provided at an image side of the third lens, and the shading plate as described in claim 1 , and the light shading plate is provided between the third lens and the fourth lens.
9 . The lens module as described in claim 8 , wherein the light shading arm comprises a first light shading arm and a second light shading arm; the first light shading arm is provided on an edge of the inner peripheral surface close to the object-side surface; and the second light shading arm is provided on an edge of the inner peripheral surface close to the image-side surface.
10 . The lens module as described in claim 9 , wherein the first light shading arm comprises a first surface close to the image side, a second surface opposite to the first surface, and a first end surface extending obliquely from a side of the second surface close to the optical axis to the first surface along a direction facing away from the optical axis; the second light shading arm comprises a third surface close to the image side, a fourth surface opposite to the third surface, and a second end surface extending obliquely from a side of the fourth surface close to the optical axis to the third surface along a direction facing away from the optical axis; and a distance between the first end surface and the optical axis is smaller than a distance between the second end surface and the optical axis.
11 . The lens module as described in claim 10 , wherein the first surface is provided with an extinction area.
12 . The lens module as described in claim 11 , wherein the first end surface is provided with an extinction area.
13 . The lens module as described in claim 12 , wherein the second end surface is provided with an extinction area.
14 . The lens module as described in claim 8 , wherein the light shading arm and the body are formed into one piece.