Method and apparatus of optical module assembly

Patent metadata

Field	Value
Publication number	US-11415410-B2
Application number	US-201816652361-A
Country	US
Kind code	B2
Filing date	Sep 6, 2018
Priority date	Oct 17, 2017
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

Abstract

Provided are a method and an apparatus of optical module assembly, where the method includes: when an optical module to be aligned images, controlling an alignment mechanism clamping a lens to be assembled to move in a set direction by a set movement step; when the alignment mechanism moves each time, collecting, by an image acquisition device, light spots imaged by the optical module to be aligned sequentially, and selecting a light spot with a minimum size from the collected light spots; determining an optimal position of the alignment mechanism according to at least two light spots before the light spot with the minimum size and at least two light spots thereafter; and controlling the alignment mechanism to move to the optimal position to align the lens to be assembled.

First claim

What is claimed is:

1. A method of optical module assembly, comprising:
when an optical module to be aligned images, controlling an alignment assembly clamping a lens to be assembled to move in a set direction by a set movement step;
when the alignment assembly moves each time, collecting, by an image acquisition assembly, light spots imaged by the optical module to be aligned sequentially, and selecting a light spot with a minimum size from the collected light spots;
determining an optimal position of the alignment assembly according to at least two light spots before the light spot with the minimum size and at least two light spots thereafter; and
controlling the alignment assembly to move to the optimal position to align the lens to be assembled;
wherein the selecting a light spot with a minimum size from the collected light spots comprises:
if sizes of a first number of light spots before a first light spot are all greater than a size of the first light spot, and if sizes of a second number of light spots after the first light spot are all less than the size of the first light spot, determining that the first light spot is the light spot with the minimum size.

2. The method according to claim 1 , wherein the determining an optimal position of the alignment assembly according to at least two light spots before the light spot with the minimum size and at least two light spots thereafter comprises:
establishing a coordinate system by taking a movement position of the alignment assembly as a x-coordinate, and taking a size of the collected light spot as a y-coordinate;
fitting a first straight line in the coordinate system according to the at least two light spots before the light spot with the minimum size and movement positions of the alignment assembly when collecting the at least two light spots before the light spot with the minimum size, and fitting a second straight line in the coordinate system according to the at least two light spots thereafter and movement positions of the alignment assembly when collecting the at least two light spots thereafter; and
calculating an intersection point of the first straight line and the second straight line, and taking a value of the x-coordinate of the intersection point as the optimal position of the alignment assembly.

3. The method according to claim 1 , wherein the controlling an alignment assembly clamping a lens to be assembled to move in a set direction by a set movement step further comprises:
controlling the alignment assembly to move from a beginning or an ending of an assembly area corresponding to the lens to be assembled in the set direction by the set movement step.

4. The method according to claim 1 , wherein before the determining an optimal position of the alignment assembly according to at least two light spots before the light spot with the minimum size and at least two light spots thereafter further comprises:
taking a movement position of the alignment assembly when the light spot with the minimum size is collected as a suspicion position;
controlling the alignment assembly to move to the suspicion position and movement positions of a set number before and after the suspicion position, and collecting, by the image acquisition assembly, light spots imaged by the optical module to be aligned when the alignment assembly moves each time sequentially; and
if in the light spots imaged by the optical module to be aligned when the alignment assembly moves each time, the collected light spot is with the minimum size when the alignment assembly moves to the suspicion position, determining that the light spot with the minimum size passes a repeated verification.

5. The method according to claim 1 , wherein before the optical module to be aligned imaging further comprises:
controlling the alignment assembly to place the lens to be assembled at a specified position of an optical component to be assembled, to obtain the optical module to be aligned; and
controlling a power supply component to supply power to an internal light source device of the optical module to be aligned or an external light source device located on an object side of the optical module to be aligned, so that the optical module to be aligned images.

6. An apparatus of optical module assembly, comprising:
a memory storing instructions; and
a processor configured to execute the instructions to:
control an alignment assembly clamping a lens to be assembled to move in a set direction by a movement step when an optical module to be aligned images;
when the alignment assembly moves each time, collect light spots imaged by the optical module to be aligned sequentially, and select a light spot with a minimum size from the collected light spots;
determine an optimal position of the alignment assembly according to at least two light spots before the light spot with the minimum size and at least two light spots thereafter; and
to control the alignment assembly to move to the optimal position to align the lens to be assembled;
wherein the apparatus is specifically configured to:
if sizes of a first number of light spots before a first light spot are all greater than a size of the first light spot, and if sizes of a second number of light spots after the first light spot are all less than the size of the first light spot, determine that the first light spot is the light spot with the minimum size.

7. The apparatus according to claim 6 , wherein the apparatus is specifically configured to:
establish a coordinate system by taking a movement position of the alignment assembly as a x-coordinate, and taking a size of the collected light spot as a y-coordinate;
fit a first straight line in the coordinate system according to the at least two light spots before the light spot with the minimum size and movement positions of the alignment assembly when collecting the at least two light spots before the light spot with the minimum size, and fit a second straight line in the coordinate system according to the at least two light spots thereafter and movement positions of the alignment assembly when collecting the at least two light spots thereafter; and
calculate an intersection point of the first straight line and the second straight line, and take a value of the x-coordinate of the intersection point as the optimal position of the alignment assembly.

8. The apparatus according to claim 6 , wherein the apparatus is further configured to:
take a movement position of the alignment assembly when the light spot with the minimum size is collected as a suspicion position;
control the alignment assembly to move to the suspicion position and movement positions of a set number before and after the suspicion position, and collecting light spots imaged by the optical module to be aligned when the alignment assembly moves each time sequentially; and
if in the light spots imaged by the optical module to be aligned when the alignment assembly moves each time, the collected light spot is with the minimum size when the alignment assembly moves to the suspicion position, determine that the light spot with the minimum size passes a repeated verification.

9. The apparatus according to claim 6 , wherein the apparatus is further configured to:
control the alignment assembly to place the lens to be assembled at a specified position of an optical component to be assembled, to obtain the optical module to be aligned; and
control a power supply component to supply power to an internal light source device of the optical module to be aligned or an external light source device located on an object side of the optical module to be aligned, so that the optical module to be aligned images.

Assignees

• Goertek Inc

Inventors

• Dong nanjing
• Sun Debo

Classifications

• H04N9/3194 Primary

  including sensor feedback · CPC title

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• H04N9/3129

  scanning a light beam on the display screen (scanning a light beam on a screen in displays other than projection devices G09G3/02; scanning systems in general G02B26/10; projectors using laser light sources in general H04N9/3161) · CPC title

• G02B7/023

  permitting adjustment · CPC title

• G02B7/003

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