Lens, lens assembly, and mobile electronic device
A lens includes a lens unit, an uneven layer formed on at least a portion of a surface of the lens unit, a buffer layer covering the uneven layer and having a shape conforming to an uneven surface of the uneven layer, and a water-repellent layer covering the buffer layer.
1 . A lens, comprising:
a lens unit;
an uneven layer disposed on at least a portion of a surface of the lens unit;
a buffer layer covering the uneven layer and having a shape conforming to an uneven surface of the uneven layer; and
a water-repellent layer covering the buffer layer,
wherein the uneven layer has a reflectivity of 0.2 or less in the visible light region at least in a range of 400 nm to 780 nm,
wherein the uneven layer comprises an uneven structure having an irregular shape, and
wherein the uneven layer comprises a cavity, edges of the cavity are comprised of the uneven structure, and the uneven structure surrounds the cavity.
2 . The lens of claim 1 , wherein the buffer layer has a thickness greater than a thickness of the water-repellent layer.
3 . The lens of claim 1 , wherein the uneven surface of the uneven layer has a roughness Ra of 10 nm or more.
4 . The lens of claim 1 , wherein the uneven surface of the uneven layer has a roughness Ra of 10 nm or more and 100 nm or less.
5 . The lens of claim 1 , wherein a thickness of the buffer layer is 2 nm or more and 10 nm or less.
6 . The lens of claim 1 , wherein the buffer layer includes at least one material selected from a group consisting of siloxane, SiO 2 , SiON, Si 3 N 4 , TiO 2 , TiON, and TIN.
7 . The lens of claim 1 , wherein the water-repellent layer has a shape conforming to a surface of the buffer layer.
8 . The lens of claim 1 , wherein the water-repellent layer forms a chemical bond with the buffer layer.
9 . The lens of claim 1 , wherein a thickness of the water-repellent layer is 10 nm or less.
10 . The lens of claim 1 , further comprising:
a base layer disposed between the lens unit and the uneven layer.
11 . The lens of claim 10 , wherein the base layer comprises a SiO 2 layer.
12 . The lens of claim 10 , wherein a thickness of the base layer is 200 nm or less.
13 . The lens of claim 10 , wherein the base layer comprises a laminated structure including a SiO 2 layer and a TiO 2 layer.
14 . The lens of claim 1 , wherein the uneven layer is formed on one surface of the lens unit and an other surface opposing to the one surface.
15 . The lens of claim 14 , further comprising:
a base layer disposed on the one surface and the other surface of the lens unit between the lens unit and the uneven layer.
16 . The lens of claim 15 , wherein the base layer comprises a laminated structure including a SiO 2 layer and a TiO 2 layer.
17 . The lens of claim 14 ,
wherein the uneven layer is formed directly on the one surface of the lens unit, and
wherein the lens further comprises a base layer disposed between the lens unit and the uneven layer on the other surface of the lens unit.
18 . The lens of claim 17 , wherein the base layer comprises a laminated structure including a SiO 2 layer and a TiO 2 layer.
19 . A lens assembly, comprising:
one or more lenses,
wherein at least one of the one or more lenses is a low-reflection lens comprising a lens unit, an uneven layer formed on at least a portion of a surface of the lens unit, a buffer layer covering the uneven layer and having a shape conforming to an uneven surface of the uneven layer, and a water-repellent layer covering the buffer layer,
wherein the uneven layer has a reflectivity of 0.2 or less in the visible light region at least in a range of 400 nm to 780 nm,
wherein the uneven layer comprises a cavity, edges of the cavity are comprised of an uneven structure of the uneven layer, and the uneven structure surrounds the cavity.
20 . The lens assembly of claim 19 , wherein the buffer layer has a thickness greater than a thickness of the water-repellent layer.
21 . The lens assembly of claim 19 , wherein the low-reflection lens is disposed on an outermost side of the lens assembly in an optical axis direction among the one or more lenses.
22 . A mobile electronic device, comprising:
a display unit; and
a lens assembly,
wherein the lens assembly includes one or more lenses, and
wherein at least one of the one or more lenses is a low-reflection lens comprising a lens unit, an uneven layer formed on at least a portion of a surface of the lens unit, a buffer layer covering the uneven layer and having a shape conforming to an uneven surface of the uneven layer, and a water-repellent layer covering the buffer layer,
wherein the uneven layer has a reflectivity of 0.2 or less in the visible light region at least in a range of 400 nm to 780 nm,
wherein the uneven layer comprises a cavity, edges of the cavity are comprised of an uneven structure of the uneven layer, and the uneven structure surrounds the cavity.
23 . The mobile electronic device of claim 22 , wherein the low-reflection lens is disposed on an outermost side of the lens assembly in an optical axis direction of the one or more lenses.
24 . The mobile electronic device of claim 22 , wherein the lens assembly is covered by the display unit.
25 . The mobile electronic device of claim 22 , wherein the lens assembly is covered by tempered glass.
26 . A low-reflection lens, comprising:
a lens unit comprising one surface and an other surface opposing the one surface;
an uneven layer disposed on one or more of the one surface and the other surface; and
a water repellent layer disposed on the uneven layer,
wherein the uneven layer has a reflectivity of 0.2 or less in the visible light region at least in a range of 400 nm to 780 nm,
wherein the uneven layer comprises a cavity, edges of the cavity are comprised of an uneven structure of the uneven layer, and the uneven structure surrounds the cavity.
27 . The low-reflection lens of claim 26 , further comprising a buffer layer disposed between the uneven layer and the water repellent layer on one or more of the one surface and the other surface.
28 . The low-reflection lens of claim 26 , further comprising a base layer disposed between the uneven layer and the lens unit on one or more of the one surface and the other surface.
29 . The low-reflection lens of claim 28 , wherein the base layer comprises a laminated structure including a first material layer and a second material layer different from the first material layer on one or more of the one surface and the other surface.
30 . A lens assembly, comprising:
one or more lenses,
wherein the one or more lenses comprise at least one low-reflection lens of claim 26 .
31 . The lens assembly of claim 30 , wherein the at least one low-reflection lens comprises a lens disposed on an outermost side of the lens assembly in an optical axis direction of the one or more lenses.
32 . A mobile electronic device, comprising:
the lens assembly of claim 30 ; and
a display unit,
wherein the lens assembly is covered by one or more of the display unit and a tempered glass.