Lens and lens module having the same
A lens module is provided. The lens module includes a first lens, a second lens, and a third lens sequentially disposed from an object side to an imaging side, a first spacing member disposed between the first lens and the second lens and having a first passage extending in a direction that intersects an optical axis, a second spacing member disposed between the second lens and the third lens and having a second passage extending in a direction that intersects the optical axis, and a lens barrel configured to accommodate the first lens, the second lens, the third lens, the first spacing member and the second spacing member, and configured to have a first connection passage disposed on an inner side surface and connected to the first passage and the second passage.
1 . A lens module, comprising:
a first lens, a second lens, and a third lens sequentially disposed from an object side to an imaging side;
a first spacing member, disposed between the first lens and the second lens, and having a first passage that extends in a direction that intersects an optical axis;
a second spacing member, disposed between the second lens and the third lens, and having a second passage that extends in the direction that intersects the optical axis; and
a lens barrel configured to accommodate the first lens, the second lens, the third lens, the first spacing member and the second spacing member, and configured to have a first connection passage disposed on an inner side surface and connected to the first passage and the second passage,
wherein the first lens has protrusions disposed on a flange portion at a first interval (G) in a circumferential direction and configured to form a lens passage connecting an object-side space and/or an image-side space thereof and an outer space of the flange portion, and
wherein 0.06<APsum/AL<0.1, where APsum is a sum of cross-sectional areas of the protrusions, and AL is a cross-sectional area of the first lens.
2 . The lens module of claim 1 , wherein the first passage is disposed at predetermined intervals in a circumferential direction of the first spacing member.
3 . The lens module of claim 1 , wherein a length of the first spacing member in the optical axis direction is less than a length of the second spacing member in the optical axis direction.
4 . The lens module of claim 1 , wherein a maximum distance from an image-side surface of the first lens to an object-side surface of the second lens is less than a maximum distance from an image-side surface of the second lens to an object-side surface of the third lens.
5 . The lens module of claim 1 , wherein an image-side surface of the first lens and an object-side surface of the second lens are respectively concave.
6 . The lens module of claim 1 , further comprising:
a fourth lens disposed on an image side of the third lens; and
a third spacing member disposed between the third lens and the fourth lens, and having a third passage that extends in a direction that intersects the optical axis.
7 . The lens module of claim 6 , wherein a maximum distance from an image-side surface of the first lens to an object-side surface of the second lens is less than a maximum distance from an image-side surface of the third lens to an object-side surface of the fourth lens.
8 . The lens module of claim 6 , wherein a second connection passage connecting the first passage and the third passage is provided on the inner side surface of the lens barrel.
9 . The lens module of claim 6 , wherein a third connection passage connecting the second passage and the third passage is provided on the inner side surface of the lens barrel.
10 . An electronic device, comprising the lens module of claim 1 .