Lens assembly

Patent metadata

Field	Value
Publication number	US-10215949-B2
Application number	US-201615566368-A
Country	US
Kind code	B2
Filing date	Apr 14, 2016
Priority date	Apr 16, 2015
Publication date	Feb 26, 2019
Grant date	Feb 26, 2019

Abstract

A lens assembly according to an embodiment of the present invention comprises: a housing; a lens received in the housing; a retainer which is coupled to one end of the housing and supports the lens; and a hydrophilic coating layer formed on one surface of the lens and on the retainer.

First claim

The invention claimed is:

1. A lens assembly comprising:
a housing;
a lens accommodated in the housing;
a retainer coupled to one end of the housing and configured to support the lens; and
a hydrophilic coating layer formed on one surface of the lens and formed on the retainer,
wherein the hydrophilic coating layer includes a polymer containing a hydrophilic functional group, and
wherein the hydrophilic functional group is selected from the group consisting of a hydroxyl group, an amino group, and an epoxy group.

2. The lens assembly of claim 1 , wherein the one surface of the lens is a surface that is exposed to the outside.

3. The lens assembly of claim 2 , wherein the retainer includes a sidewall configured to surround an edge of the surface that is exposed to the outside and protrude in a direction toward an object side.

4. The lens assembly of claim 3 , wherein the sidewall is inclined with respect to a horizontal plane of the lens.

5. The lens assembly of claim 4 , wherein an angle formed by the sidewall and the horizontal plane of the lens is 20 degrees or less.

6. The lens assembly of claim 3 , wherein the sidewall includes a recess extending from a boundary between the lens and the sidewall in the direction toward the object side.

7. The lens assembly of claim 3 , wherein the sidewall has a concave shape.

8. The lens assembly of claim 1 , wherein the hydrophilic coating layer has a thickness in a range of 1 nm to 100 nm.

9. The lens assembly of claim 1 , wherein the hydrophilic functional group is bound to each monomer forming the polymer.

10. The lens assembly of claim 1 , wherein the lens and the hydrophilic coating layer are covalently bound to each other.

11. The lens assembly of claim 10 , wherein the lens and the hydrophilic coating layer are covalently bound to each other by O of the lens and Si or C of the hydrophilic coating layer.

12. The lens assembly of claim 1 , wherein a contact angle of the surface of the lens is 15 degrees or less, and wherein the contact angle is a spreading angle of the water.

13. A lens assembly comprising:
a housing;
a lens accommodated in the housing;
a retainer coupled to one end of the housing and configured to support the lens;
a hydrophilic coating layer formed on one surface of the lens; and
a water-repellent coating layer formed on the retainer.

14. The lens assembly of claim 13 , wherein the one surface of the lens is a surface that is exposed to the outside.

15. The lens assembly of claim 14 , wherein the retainer includes a sidewall configured to surround an edge of the surface that is exposed to the outside and protrude in a direction toward an object side.

16. The lens assembly of claim 15 , wherein the sidewall is inclined with respect to a horizontal plane of the lens.

17. The lens assembly of claim 16 , wherein an angle formed by the sidewall and the horizontal plane of the lens is 20 degrees or less.

18. The lens assembly of claim 15 , wherein the sidewall includes a recess extending from a boundary between the lens and the sidewall in the direction toward the object side.

19. The lens assembly of claim 15 , wherein the sidewall has a concave shape.

20. The lens assembly of claim 13 , wherein each of the hydrophilic coating layer and the water-repellent coating layer has a thickness in a range of 1 nm to 100 nm.

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Hee Jung
• Noh Jin Mi
• Moon Won Ha
• Bae Seok
• Lee Jong Hyuk
• Lee Hyun Ji

Classifications

• G02B1/18 Primary

  Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films (G02B1/16 takes precedence) · CPC title

• G03B17/08

  Waterproof bodies or housings · CPC title

• G02B7/022

  lens and mount having complementary engagement means, e.g. screw/thread · CPC title

• G02B1/14

  Protective coatings, e.g. hard coatings · CPC title

• G02B7/02 Primary

  for lenses {(supports for magnifying lenses G02B25/002)} · CPC title