Optical lens, imaging module and assembly method thereof

Patent metadata

Field	Value
Publication number	US-11934030-B2
Application number	US-202117179887-A
Country	US
Kind code	B2
Filing date	Feb 19, 2021
Priority date	Aug 21, 2018
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

The present disclosure provides an optical lens, which includes a first lens member, a second lens member and a first adhesive. The first lens member includes at least one first lens. The second lens member includes a second lens barrel and at least one second lens mounted in the second lens barrel. The at least one second lens and the at least one first lens together forms an imaging optical system. The second lens member has a second optical region and a second structural region surrounding the second optical region. The second structural region has a second top surface and the second top surface has a groove. The first adhesive locates in a first gap between the first lens member and the second lens member, and the first adhesive is accommodated in the groove. The first adhesive is adapted to flow in the groove when uncured.

First claim

What is claimed is:

1. An optical lens comprising:
a first lens member comprising at least one first lens, the first lens member having a first optical region and a first structural region surrounding the first optical region;
a second lens member comprising a second lens barrel and at least one second lens mounted in the second lens barrel, the at least one second lens and the at least one first lens together forming an imaging optical system, the second lens member having a second optical region and a second structural region surrounding the second optical region, the second structural region having a second top surface and the second top surface having a groove; and
a first adhesive located in a first gap between the first lens member and the second lens member, the first adhesive being accommodated in the groove, and the first adhesive supporting and fixing the first lens member and the second lens member after curing, the groove having a glue filling opening extending toward an outside of the second lens barrel, and the first adhesive being filled into the groove through the glue filling opening;
wherein the first adhesive flows in the groove when uncured.

2. The optical lens according to claim 1 , wherein the first adhesive is positioned between the first structural region and the second structural region such that a relative position of the first lens member and the second lens member is maintained at a relative position determined by active calibration.

3. The optical lens according to claim 1 , wherein the first lens member is sized and shaped such that at least one portion of the groove is not covered by the first lens member when the first lens member and the second lens member are maintained at a relative position determined by active calibration.

4. The optical lens according to claim 1 , wherein the second top surface has a boss and the groove is located on the boss.

5. The optical lens according to claim 4 , wherein the boss has a first blocking portion and a second blocking portion, and the first adhesive is located between the first blocking portion and the second blocking portion.

6. The optical lens according to claim 1 , wherein a bottom surface of the first structural region has a protrusion which mates with the groove.

7. The optical lens according to claim 1 , wherein the groove is in the form of a closed ring or a notched ring.

8. The optical lens according to claim 1 , wherein the groove has a first side and a second side, and an outer side of the first structural region is located between the first side and the second side.

9. The optical lens according to claim 1 , wherein the first adhesive has a viscosity of less than 500 cps.

10. The optical lens according to claim 1 , wherein the first adhesive has a bonding force of greater than 5 Mpa.

11. The optical lens according to claim 1 , wherein the first adhesive is black.

12. An imaging module comprising an optical lens and an optical sensor, wherein the optical lens comprises:
a first lens member comprising at least one first lens, the first lens member having a first optical region and a first structural region surrounding the first optical region;
a second lens member comprising a second lens barrel and at least one second lens mounted in the second lens barrel, the at least one second lens and the at least one first lens together forming an imaging optical system, the second lens member having a second optical region and a second structural region surrounding the second optical region, the second structural region having a second top surface and the second top surface having a groove; and
a first adhesive located in a first gap between the first lens member and the second lens member, the first adhesive being accommodated in the groove, and the first adhesive supporting and fixing the first lens member and the second lens member after curing, the groove having a glue filling opening extending toward an outside of the second lens barrel, and the first adhesive being filled into the groove through the glue filling opening;
wherein the first adhesive flows in the groove when uncured.

13. An assembly method for an optical lens, comprising:
pre-positioning a first lens member and a second lens member, wherein the first lens member comprises at least one first lens, the first lens member has a first optical region and a first structural region surrounding the first optical region, the second lens member comprises a second lens barrel and at least one second lens mounted in the second lens barrel, the second lens member has a second optical region and a second structural region surrounding the second optical region, the second structural region has a second top surface and the second top surface has a groove, the groove has a glue filling opening extending toward an outside of the second lens barrel, a first adhesive is filled into the groove through the glue filling opening, and wherein the pre-positioning enables the at least one first lens and the at least one second lens together constitute an imaging optical system;
determining a relative position of the first lens member and the second lens member by performing active calibration according to a measured imaging result of the imaging optical system; and
bonding the first lens member and the second lens member by injecting a first adhesive into the groove to support and fix the relative position of the first lens member and the second lens member after the first adhesive is cured.

14. The assembly method according to claim 13 , wherein the first lens member and the second lens member are maintained in the relative position determined by active calibration when the first adhesive is injected into the groove.

Assignees

• Ningbo Sunny Opotech Co Ltd

Inventors

• Tanaka Takehiko
• Jiang Heng

Classifications

• G02B7/025 Primary

  using glue · CPC title

• G02B7/003

  Alignment of optical elements (G02B7/001, G02B7/002 take precedence; for mirrors G02B7/1822) · CPC title

• G02B7/021 Primary

  for more than one lens · CPC title

• G02B13/18

  with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration {(G02B13/002 takes precedence)} · CPC title