Method and apparatus of optical module assembly

Patent metadata

Field	Value
Publication number	US-11079221-B2
Application number	US-201816652359-A
Country	US
Kind code	B2
Filing date	Sep 6, 2018
Priority date	Oct 17, 2017
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

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 light spots imaged by the optical module to be aligned sequentially, and selecting an estimated light spot with a minimum size from the collected light spots; searching for an ideal light spot with a minimum size according to a reduced movement step and the estimated light spot with the minimum size; determining a movement position of the alignment mechanism when the ideal light spot with the minimum size is collected as an optimal position of the alignment mechanism; 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 mechanism clamping a lens to be assembled to move in a set direction by a first movement step;
when the alignment mechanism moves each time, collecting light spots imaged by the optical module to be aligned sequentially, and selecting an estimated light spot with a minimum size from the collected light spots; wherein the estimated light spot with the minimum size is a collected light spot with a size less than all sizes of a first number of light spots before the estimated light spot with a minimum size, and less than all sizes of a second number of light spots after the estimated light spot with a minimum size;
controlling the alignment mechanism to move by a second movement step, and searching for an ideal light spot with a minimum size according to the second movement step and the estimated light spot with the minimum size; wherein the second movement step is shorter than the first movement step;
determining a movement position of the alignment mechanism when the ideal light spot with the minimum size is collected as an optimal position of the alignment mechanism; and
controlling the alignment mechanism to move to the optimal position to align the lens to be assembled.

2. The method according to claim 1 , wherein the searching for an ideal light spot with a minimum size according to a reduced movement step and the estimated light spot with the minimum size comprises:
taking a movement position of the alignment mechanism when the estimated light spot with the minimum size is collected as an estimated optimal position, and controlling the alignment mechanism to move to each of two sides of a center a set time of the reduced movement step, wherein the estimated optimal position is set as the center; and
collecting the light spots imaged by the optical module to be aligned when the alignment mechanism moves to each of two sides of the center the set time of the reduced movement step sequentially, and selecting the ideal light spot with a minimum size from the collected light spots.

3. The method according to claim 1 , wherein the controlling an alignment mechanism clamping a lens to be assembled to move in a set direction by a first movement step further comprises:
controlling the alignment mechanism 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 first movement step.

4. The method according to claim 1 , wherein before the searching for an ideal light spot with a minimum size according to a reduced movement step and the estimated light spot with the minimum size further comprises:
taking a movement position of the alignment mechanism when the estimated light spot with the minimum size is collected as a suspicion position;
controlling the alignment mechanism to move to the suspicion position and movement positions of a set number before and after the suspicion position, and collecting, by an image acquisition device, light spots imaged by the optical module to be aligned when the alignment mechanism moves each time sequentially; and
if in the light spots imaged by the optical module to be aligned when the alignment mechanism moves each time, the collected light spot is with the minimum size when the alignment mechanism moves to the suspicion position, determining that the estimated 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 mechanism 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 movement module, an estimated light spot with a minimum size selecting module, an ideal light spot with a minimum size selecting module, an optimal position selecting module, and an alignment module; wherein, the movement module, the estimated light spot with a minimum size selecting module, the ideal light spot with a minimum size selecting module, the optimal position selecting module, and the alignment module are connected sequentially; and wherein,
the movement module, configured to control an alignment mechanism clamping a lens to be assembled to move in a set direction by a first movement step when an optical module to be aligned images;
the estimated light spot with a minimum size selecting module, configured to when the alignment mechanism moves each time, collect light spots imaged by the optical module to be aligned sequentially, and select an estimated light spot with a minimum size from the collected light spots; wherein the estimated light spot with the minimum size is a collected light spot with a size less than all sizes of a first number of light spots before the estimated light spot with a minimum size, and less than all sizes of a second number of light spots after the estimated light spot with a minimum size;
the ideal light spot with a minimum size selecting module, configured to control the alignment mechanism to move by a second movement step, and search for an ideal light spot with a minimum size according to a reduced movement step and the estimated light spot with the minimum size; wherein the second movement step is shorter than the first movement step;
the optimal position selecting module, configured to determine a movement position of the alignment mechanism when the ideal light spot with the minimum size is collected as an optimal position of the alignment mechanism; and
the alignment module, configured to control the alignment mechanism to move to the optimal position to align the lens to be assembled.

7. The apparatus according to claim 6 , wherein the ideal light spot with a minimum size selecting module is specifically configured to:
take a movement position of the alignment mechanism when the estimated light spot with the minimum size is collected as an estimated optimal position, and control the alignment mechanism to move to each of two sides of a center a set time of the reduced movement step, wherein the estimated optimal position is set as the center; and
collect the light spots imaged by the optical module to be aligned when the alignment mechanism moves to each of two sides of the center the set time of the reduced movement step sequentially, and select the ideal light spot with a minimum size from the collected light spots.

8. The apparatus according to claim 6 , wherein the movement module is further configured to:
control the alignment mechanism 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 first movement step.

9. The apparatus according to claim 6 , further comprising a verification module, wherein the verification module is connected to the estimated light spot with the minimum size selecting module and the optimal position selecting module, and is configured to:
take a movement position of the alignment mechanism when the estimated light spot with the minimum size is collected as a suspicion position;
control the alignment mechanism to move to the suspicion position and movement positions of a set number before and after the suspicion position, and collect, by an image acquisition device, light spots imaged by the optical

Assignees

• Goertek Inc

Inventors

• Dong nanjing
• Sun Debo

Classifications

• H04N23/55

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

• G02B7/02

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

• H04N17/002

  for television cameras · CPC title

• G02B27/62 Primary

  Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems · CPC title

• G02B7/025

  using glue · CPC title