CN-117008278-B - Optical assembly and assembly method thereof

CN117008278BCN 117008278 BCN117008278 BCN 117008278BCN-117008278-B

Abstract

The application provides an optical component and an assembling method thereof, wherein the positions of a first lens part and a second lens part are synchronously adjusted by fixing a third lens part by taking the optical axis as a reference, according to the influence of the sensitivity of an optical lens, the first lens part with higher sensitivity and a shell of a driving device are firstly fixed, then the position of the second lens part with secondary sensitivity is adjusted, finally the second lens part can be clearly imaged and then is fixed on a focusing carrier of the driving device, and finally the optical component is formed and assembled. By the assembly method, the accuracy of the assembled optical component can be ensured while the assembly process flow is simplified.

Inventors

CHEN LIEFENG
LIU CHUNMEI
QI YANGDI
LIU JIA
GUO MEISHAN

Assignees

宁波舜宇光电信息有限公司

Dates

Publication Date: 20260505
Application Date: 20220429

Claims (9)

1. A method of assembling an optical assembly, comprising: (a) Providing an optical lens, wherein the optical lens comprises a first lens part, a second lens part and a third lens part which are sequentially arranged from an object side to an image side along the optical axis direction; (b) The third lens part and the fixing part of the optical assembly are fixedly arranged; (c) Pre-positioning the first lens portion along an optical axis of the third lens portion; (d) Assembling and calibrating the first lens part, the second lens part and the third lens part to form a clearly imaged optical lens; (e) Fixing the first lens part to the fixing part, and fixing the second lens part to a movable part of an optical assembly; wherein step (e) comprises: fixing the first lens part and the fixing part; adjusting the second lens portion in a plurality of degrees of freedom with respect to the fixedly connected first and third lens portions; And when the optical lens formed by the second lens part, the first lens part and the third lens part can meet the imaging requirement, fixing the second lens part and the movable part.
2. The method of assembling of claim 1, wherein in step (d), assembling and calibrating the first lens portion, the second lens portion, and the third lens portion comprises: calibrating a Z-direction gap of the second lens part by taking the third lens part as a reference; correcting a Z-direction gap of the first lens part by taking the third lens part and the second lens part as references; correcting the position of the second lens part in the XY direction by taking the third lens part as a reference; And correcting the position of the first lens part in the XY direction by taking the third lens part and the second lens part as references.
3. The method of assembling of claim 2, wherein in step (b), the fixing portion includes a base, the base includes a base body and a supporting portion, the supporting portion and the base body form a mounting location for the annular structure extending downward from a peripheral area of the base body, and the third lens portion is fixed at the mounting location.
4. The assembly method according to claim 3, wherein the fixing portion further comprises a housing, the housing includes a main body and a bearing portion, the main body is hollow and annular, and an upper end surface near the object side extends inwards to form the bearing portion.
5. The assembly method according to claim 4, wherein in the step (c), the bearing portion of the first lens portion, which is intended to be assembled on the housing, is held above the second lens portion.
6. The assembly method according to claim 5, wherein the movable portion includes an optical anti-shake portion, the second lens portion is predetermined to be assembled to the movable portion, and the optical anti-shake portion drives the second lens portion to be movable in a direction perpendicular to the optical axis with respect to the first lens portion and the third lens portion.
7. The assembly method of claim 6, wherein the body and the bearing portion form a receiving space, the second lens portion being disposed in the receiving space, the second lens portion moving in the receiving space along a direction perpendicular to the optical axis.
8. The assembly method according to claim 7, wherein the bearing portion of the housing is provided with an escape groove, and the second lens portion is clamped and adjusted by the escape groove.
9. The assembly method according to claim 8, wherein the second lens part includes a clamping part integrally extending outward along a side edge of the second lens part and extending into a space of the escape groove formed in the housing, so as to clamp the clamping part through the escape groove to adjust a position of the second lens part.

Description

Optical assembly and assembly method thereof Technical Field The application relates to the technical field of camera modules, in particular to an optical assembly capable of performing optical anti-shake internal focusing and a camera module. Background The optical lens is one of the necessary components of the camera module, and can collect incident light rays to enable the camera module to image. In recent years, as the requirements of users on the imaging quality of the imaging module are higher and higher, the pixels of the imaging module are also continuously improved, and meanwhile, in order to improve the imaging quality of the imaging module, the size of the photosensitive chip is correspondingly increased, so that the design requirements on the optical lens adapted to the photosensitive chip are also higher and higher. The existing integrated optical lens configured in the camera module comprises a lens barrel and a plurality of lenses arranged in the lens barrel, and due to the technical limitations of the design and the assembly method of the integrated optical lens, the camera module configured with the integrated optical lens is difficult to meet the requirement of miniaturization of the large-chip camera module, meanwhile, the total height of the lens is higher, and in order to realize an automatic focusing function, a certain avoiding space is reserved in the module for focusing movement of the lens. How to realize focusing and anti-shake of an optical lens matched with a large-size chip and simultaneously ensure miniaturization of the whole structure of the optical lens is still a technical problem which needs to be solved rapidly at present. Disclosure of Invention In view of the above problems, the present invention provides a lens driving structure suitable for focusing in a large-sized chip, which can solve some or most of the problems existing in the existing integrated lens scheme while realizing the anti-shake function. The invention provides an internal focusing camera module optical component suitable for a large image plane, which aims to improve the imaging quality of a camera module, increases the size of a photosensitive chip, increases the driving force requirements for anti-shake and focusing, and ensures the miniaturization of the whole structure while improving the imaging quality of the camera module, thus being one of the problems which are urgently needed to be solved at present. After the size of the photosensitive chip increases, the size of the optical lens adapted to the photosensitive chip also increases, and at the same time, the weight of the optical lens also increases, and in some cases, the driving force provided by the driving device may be insufficient to drive the optical lens to perform focusing and anti-shake due to the excessive weight of the optical lens. If the structure of the driving device is improved to provide a larger driving force, the overall size of the driving device is increased, and the current trend of miniaturization development is not met. Based on the technical difficulties, the optical lens is divided into a plurality of lens groups, so that the driving device drives part of the groups to move, focusing and anti-shake effects in the large chip imaging process are realized, and the imaging quality of the imaging module is improved while the miniaturization of the whole structure is considered. An object of the present invention is to provide an optical assembly and an image pickup module, which divide an overall optical lens into a plurality of lens groups, and drive a part of the lens portions therein to move, thereby improving imaging quality and ensuring miniaturization of the overall structure. Another object of the present invention is to provide an optical assembly and an image capturing module, in which a driving device is disposed to at least one lens portion of a plurality of groups of optical lenses. Another object of the present invention is to provide an optical assembly and an image capturing module, in which the optical lens group mainly includes three lens portions, so that the second lens portion is movable, and the driving force deficiency is solved. Another object of the present invention is to provide an optical assembly and an image capturing module, so that, when the first lens portion and the third lens portion are fixedly installed, a certain gap is kept between the first lens portion and the third lens portion, and a focusing distance of the second lens portion is reserved. Another object of the present invention is to provide an optical assembly and an image capturing module, in which the first lens portion and the third lens portion are fixed on a fixed portion of the driving device, the second lens portion is fixed on a movable portion of the driving device, and the driving portion lens achieves an anti-shake or focusing function. Another objective of the present invention is to provide an optical assembly and