Lens assembly and camera module including the same

Patent metadata

Field	Value
Publication number	US-2016178805-A1
Application number	US-201514966361-A
Country	US
Kind code	A1
Filing date	Dec 11, 2015
Priority date	Dec 19, 2014
Publication date	Jun 23, 2016
Grant date	—

Abstract

A lens assembly having a lens barrel having an internal space. The lenses are stacked in the internal space of the lens barrel. Each of the lenses has an effective portion and a rib extending in a radial direction from an outer radial edge of the effective portion; and a blocking part is provided on an axial surface of at least one rib.

First claim

What is claimed is:

1 . A lens assembly comprising:
a lens barrel comprising an internal space; lenses stacked in the internal space of the lens barrel, wherein each of the lenses has an effective portion and a rib extending in a radial direction from an outer radial edge of the effective portion; and a blocking part is provided on an axial surface of at least one rib.

2 . The lens assembly of claim 1 , wherein the blocking part is disposed on upper and lower surfaces of the rib.

3 . The lens assembly of claim 1 , wherein the blocking part is continuously disposed on the surface of the rib along the edge of an effective portion surface.

4 . The lens assembly of claim 1 , wherein the blocking part has a ring shape circumscribing an effective portion surface.

5 . The lens assembly of claim 1 , wherein the blocking part is formed of matte ink.

6 . The lens assembly of claim 5 , wherein the blocking part is formed by an inkjet printing method or a laser printing method.

7 . The lens assembly of claim 5 , wherein the matte ink includes a carbon based material, a chrome based oxide a copper based oxide, a manganese based oxide, a cobalt based oxide, a cobalt based sulfide, a nickel based oxide, or any combination thereof.

8 . The lens assembly of claim 1 , further comprising a lock ring inserted into the lens barrel to fix the lenses,
wherein the lock ring contacts the surface of the rib and an inner peripheral surface of the lens barrel.

9 . The lens assembly of claim 1 , further comprising:
a first lens adjacent to a lens hole of the lens barrel, comprising a first rib; a second lens adjacent to the first lens, comprising a second rib; a third lens adjacent to the second lens, comprising a third rib; and a fourth lens adjacent to the third lens, comprising a fourth rib.

10 . The lens assembly of claim 15 , wherein the blocking material is disposed only on an upper surface and a lower surface of the second rib, third rib or both.

11 . The lens assembly of claim 1 , wherein the blocking portion is a light absorbing material.

12 . A camera module comprising:
a lens assembly comprising:
a lens barrel comprising an internal space;
lenses stacked in the internal space of the lens barrel,
wherein each of the lenses has an effective portion and a rib extending in a radial direction from an outer radial edge of the effective portion; and
a blocking part is provided on an axial surface of at least one rib;
an image sensor having an image formation surface configured to receive light passing through the lenses; and a housing accommodating the lens barrel therein.

13 . The camera module of claim 12 , wherein the housing is provided with an optical filter configured to filter light passing through the lenses.

14 . A method of preventing internal reflections of light in a lens assembly comprising:
stacking lenses along an optical axis in a lens barrel, wherein each of the lenses has an effective portion and a rib extending radially from the effective portion; and coating an axial surface of at least one rib with a light absorbing material.

15 . The method of claim 14 , further comprising:
coating the axial surface of the at least one rib with an inkjet printing or a laser printing.

16 . The method of claim 14 , wherein the entire axial surface of the rib is continuously coated with the light absorbing material.

Assignees

• Samsung Electro Mech

Inventors

• Kang Young Suk
• Kwon Tae Kwon

Classifications

• G02B7/026

  using retaining rings or springs (G02B7/027 takes precedence) · CPC title

• G02B7/006

  Filter holders · CPC title

• G02B7/021 Primary

  for more than one lens · CPC title

• G02B1/11 Primary

  Anti-reflection coatings · CPC title

• G02B5/003 Primary

  Light absorbing elements · CPC title