Lens module

Patent metadata

Field	Value
Publication number	US-9507116-B2
Application number	US-201414554032-A
Country	US
Kind code	B2
Filing date	Nov 25, 2014
Priority date	Nov 26, 2013
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

In a lens module, a concave portion may be formed on an image-side surface of a first lens, a convex portion protruding toward the concave portion may be formed on an object-side surface of a second lens, an outer region of the concave portion of the first lens and an outer region of the convex portion of the second lens may be closely adhered to each other, the concave portion and the convex portion may be spaced apart from each other, and a gap between the concave portion and the convex portion in an optical axis direction and a gap between the concave portion and the convex portion in a direction perpendicular to an optical axis may be formed so as to be different from each other.

First claim

What is claimed is:

1. A lens module comprising:
a first lens having a concave portion formed on an image-side surface of the first lens, the concave portion comprising: an inclined first conical surface, and a first inner horizontal surface that is extended inwardly from the first conical surface; and
a second lens having a convex portion formed on an object-side surface of the second lens and protruding toward the concave portion of the first lens, the convex portion comprising: an inclined second conical surface, and a second inner horizontal surface that is extended inwardly from the second conical surface;
wherein the first and second lenses are in contact with each other at a region outside of the concave portion of the first lens and the convex portion of the second lens, and the concave portion of the first lens and the convex portion of the second lens are not in contact with each other; and
wherein a first gap, disposed between the concave portion of the first lens and the convex portion of the second lens in an optical axis direction, is different from a second gap, disposed between the concave portion of the first lens and the convex portion of the second lens in a direction perpendicular to an optical axis.

2. The lens module of claim 1 , wherein the second gap, disposed between the first and second conical surfaces in the direction perpendicular to the optical axis, is smaller than the first gap, disposed between the first and second inner horizontal surfaces.

3. The lens module of claim 1 , wherein the first gap, disposed between the first and second conical surfaces in the optical axis direction, is different from the second gap, disposed between the first and second conical surfaces in the direction perpendicular to the optical axis.

4. The lens module of claim 3 , wherein the first gap, disposed between the first and second conical surfaces in the optical axis direction, is larger than the second gap, disposed between the first and second conical surfaces in the direction perpendicular to the optical axis.

5. The lens module of claim 3 , wherein the relationship θ<45 degrees is satisfied for an angle θ disposed between the second conical surface and a line connecting the first conical surface and second conical surface in the optical axis direction.

6. The lens module of claim 3 , wherein the relationship tan θ<1 is satisfied for an angle θ disposed between the second conical surface and a line connecting the first conical surface and second conical surface in the optical axis direction.

7. A lens module comprising:
a first lens having
an inclined first conical surface,
a first inner horizontal surface, and
a first outer horizontal surface formed on an image-side surface of the first lens,
wherein the first inner horizontal surface and the first outer horizontal surface are respectively formed on distinct sides of the first conical surface; and

a second lens stacked together with, and assembled with, the first lens in an optical axis direction, and having
an inclined second conical surface,
a second inner horizontal surface, and
a second outer horizontal surface formed on an object-side surface of the second lens, facing the image-side surface of the first lens,
wherein the second inner horizontal surface and the second outer horizontal surface are respectively formed on distinct sides of the second conical surface;

wherein the first and second inner horizontal surfaces are not in contact with each other, and form a first air gap,
wherein the first and second conical surfaces are not in contact with each other, and form a second air gap,
wherein a decenter is a distance between the first and second conical surfaces in a direction perpendicular to an optical axis, and
wherein a distance in the second air gap, between the first and second conical surfaces in the optical axis direction, is larger than the decenter.

8. The lens module of claim 7 , wherein the first and second outer horizontal surfaces are in contact with each other.

9. The lens module of claim 7 , wherein the relationship θ<45 degrees is satisfied for an angle θ disposed between the second conical surface and a line connecting the first conical surface and second conical surface in the optical axis direction.

10. The lens module of claim 7 , wherein the relationship tan θ<1 is satisfied for an angle θ disposed between the second conical surface and a line connecting the first conical surface and second conical surface in the optical axis direction.

11. The lens module of claim 7 , wherein the first and second conical surfaces are disposed in parallel with each other.

12. The lens module of claim 7 ,
wherein a first distance in the second air gap is disposed between the first and second conical surfaces in the optical axis direction,
wherein a decenter is a second distance, disposed between the first and second conical surfaces in a direction perpendicular to an optical axis,
wherein an angle θ is disposed between the second conical surface and a line connecting the first conical surface and second conical surface in the optical axis direction, and
wherein when θ is constant, the first distance is less than or greater than the decenter.

13. The lens module of claim 7 , wherein the first air gap is larger than the second air gap.

Assignees

• Samsung Electro Mech

Inventors

• Choi Kwang Yun

Classifications

• G02B13/004

  having four lenses · CPC title

• G02B7/021 Primary

  for more than one lens · CPC title

• G02B2003/0093

  characterised by the shape · CPC title

• G02B7/022

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