WO2020063190A1

WO2020063190A1 - Optical lens, camera module and assembling method

Info

Publication number: WO2020063190A1
Application number: PCT/CN2019/101277
Authority: WO
Inventors: 方银丽; 姚立锋; 丁海灵
Original assignee: 宁波舜宇光电信息有限公司
Priority date: 2018-09-25
Filing date: 2019-08-19
Publication date: 2020-04-02

Abstract

Disclosed is an optical lens, comprising: a first lens component (100) including a first optic group (120), wherein the first optic group (120) comprises at least one first optic; a second lens component (200) including a second lens barrel (210) and a second optic group (220) mounted in the second lens barrel (210); the second optic group (220) comprises at least one second optic; and the first optic group (120) and the second optic group (220) together constitute an imageable optical system; and a variable diaphragm (300) located between the first lens component (100) and the second lens component (200); the first lens component (100), the second lens component (200) and the variable diaphragm (300) are bonded by a glue material. Further provided are a corresponding camera module and an assembling method for the optical lens and the camera module, so as to improve the imaging quality of the optical lens or the camera module while realizing a variable aperture and reduce the height of the optical lens for the variable aperture or the camera module.

Description

Optical lens, camera module and assembly method

Cross-reference to related applications

This application requires a Chinese invention patent application filed with the Chinese National Intellectual Property Office (CNIPA) on September 25, 2018, with application number 201811114975.1, with the invention name "optical lens, camera module, and assembly method", and September 2018 The priority and rights of the Chinese utility model patent application filed with CNIPA on May 25, with application number 201821565549.5, and the invention name is "optical lens and camera module", which are incorporated herein by reference in their entirety.

Technical field

The present application relates to the field of optical imaging technology, and in particular, the present application relates to an optical lens, a camera module, and an assembly method.

Background technique

With the development of mobile phones, computers and other terminals, users have greatly improved their needs. Especially with the development of mobile phones, users' pursuit of shooting quality has led manufacturers to develop personalized and customized camera modules, such as large apertures, wide angles, and lenses with a large number of lenses that solve aberrations. . On the one hand, this makes optical design more and more complicated; on the other hand, complex optical systems are more sensitive, which poses no small challenges to manufacturing yield and product quality. Because the optical system of a large-aperture, wide-angle camera module will be more sensitive, the reliability of its manufacturing process and verification process will be more fragile than conventional designs. Therefore, an optical lens with a better structure is needed.

The diaphragm of the current mobile phone camera module is divided into two types: variable diaphragm and invariable diaphragm. No matter which scheme, the diaphragm is an indispensable element of the optical system. It is fixed to the lens as a structural component when the lens is assembled. On or inside the lens. In the traditional lens assembly process, in order to ensure that certain design parameter standards are met, each lens of the lens and the intermediate light barrier (the light barrier can be regarded as an invariable diaphragm) are sequentially stacked and assembled in a lens barrel. For the variable aperture, since the size of the aperture needs to be variable, the component as the diaphragm needs to be excited by an external structure to change it. In the traditional camera module, the iris diaphragm is usually placed on the end surface of the front end of the lens, where the front end is the end close to the object side. However, the additional iris causes the total height of the camera module (referring to the dimension in the direction of the optical axis) to be longer, which is not conducive to miniaturization of the camera module.

Therefore, there is an urgent need for a solution for a camera module with a variable aperture that facilitates miniaturization of the camera module.

Summary of the Invention

The present application provides a solution capable of overcoming at least one drawback of the prior art.

According to an aspect of the present application, an optical lens is provided, including: a first lens component including a first lens group, the first lens group including at least one first lens; and a second lens component including a second lens A lens barrel and a second lens group installed in the second lens barrel, the second lens group including at least one second lens, and the first lens group and the second lens group together forming an imageable optical lens A system; and an iris diaphragm between the first lens member and the second lens member, and the first lens member, the second lens member, and the iris diaphragm are passed through a plastic material Stick together.

The iris diaphragm includes a diaphragm case, a driving module housed in the diaphragm case, and a plurality of diaphragm plates connected to the driving module.

Wherein, the optical lens further includes a first glue material, which is located between the first lens component and the variable aperture, and the first glue material is suitable for fixing and supporting the first lens after curing. Component and the iris to maintain the relative position of the first lens component and the second lens component at a relative position determined by active calibration, wherein the active calibration is based on actual imaging of the optical system As a result, the relative positions of the first lens member and the second lens member are adjusted.

Wherein, the first adhesive material is located between a top surface of the diaphragm case and a bottom surface of the first lens component.

The first lens component further includes a first lens barrel, and the first lens group is installed in the first lens barrel.

The top surface of the diaphragm case is a flat surface suitable for arranging the first glue material.

Wherein, the variable diaphragm is connected to the second lens component through a second adhesive material to form a second assembly, and the top surface of the diaphragm housing is suitable for identifying the first through multi-point ranging. The flat surface of the position and attitude of the two combinations.

Wherein, the diaphragm case includes a flat plate-shaped base portion located between the first lens component and the second lens component, and an extension portion located outside the second lens component.

Wherein, the flat base is adapted to receive the roots of the plurality of diaphragms, the driving module is located in the extension portion, and each of the plurality of diaphragms is adapted to be located in the driving module. Driven to translate relative to the flat-shaped base to form apertures of different sizes.

Wherein, the aperture is an aperture whose aperture size is continuously adjustable.

Wherein, the diaphragm case is in a bent shape, and the second adhesive material is located between an outer side surface of the second lens member and the extension portion.

Wherein, the top surface of the second lens member is not provided with an adhesive material for connecting the variable diaphragm and the second lens member.

Wherein, the optical lens further includes a third glue material, which is located between the variable diaphragm and the second lens component; the third glue material is suitable for fixing and supporting after curing. The iris and the second lens member, and the support of the first and third glue members keeps the relative positions of the first lens member and the second lens member to be active Relative position determined by calibration.

The first lens group is located at a front end of the second lens group.

Wherein, the number of the first lenses is not more than two.

According to another aspect of the present application, a camera module is further provided, which includes any one of the foregoing optical lenses.

According to another aspect of the present application, an optical lens assembly method is further provided, including: pre-positioning a first lens component and a second lens component, wherein the first lens component and the second lens component are separated from each other. The first lens component includes a first lens group, the first lens group includes at least one first lens, and the second lens component includes a second lens barrel and a second lens barrel mounted in the second lens barrel. A lens group, the second lens group includes at least one second lens, and the predetermined position enables the first lens group and the second lens group to form an imageable optical system together; The second lens component is actively calibrated, wherein the active calibration adjusts a relative position of the first lens component and the second lens component based on an actual imaging result of the optical system; and To fix and support the first lens part and the second lens part so that the relative positions of the two are maintained at the relative positions determined by active calibration, and A variable diaphragm is provided in a gap between the lens member and the second lens member.

Wherein, setting the iris diaphragm includes: fixing the iris diaphragm on the top of the second lens component to form a second assembly.

In the pre-positioning, the pre-positioning of the first lens component and the second lens component is performed by adjusting a relative position of the first lens component and the second combined body.

In the active calibration, the active calibration of the first lens component and the second lens component is performed by adjusting the relative positions of the first lens component and the second combination body; and the In the glue bonding, the first lens component and the second lens component are fixed and supported by bonding a top surface of the iris diaphragm and a bottom surface of the first lens component.

The iris diaphragm includes a diaphragm case, a driving module housed in the diaphragm case, and a plurality of diaphragm plates connected to the driving module, wherein a top surface of the diaphragm case is A flat surface; in the pre-positioning, multi-point ranging is performed on the top surface of the diaphragm housing to identify the position and posture of the second assembly, thereby completing the pre-positioning.

Wherein, the diaphragm housing includes a flat plate-shaped base portion adapted to be arranged between the first lens member and the second lens member, and an extension portion adapted to be arranged outside the second lens member, and An outer surface of the second lens member and the extension portion are adhered to fix the variable diaphragm to the second lens member.

Wherein, the iris diaphragm and the second lens member are separated from each other; and in the glue material bonding, the iris diaphragm and the second lens member are bonded by a glue material, and the glue material is bonded by the glue material. The first lens part and the iris are bonded, and the relative position of the first lens part and the second lens part is maintained at the relative position determined by the active calibration after the glue is cured. .

Wherein, in the active calibration, when the imaging quality of the optical system after the active calibration still fails to meet the standard, the first lens component or the second lens component is replaced.

Wherein, after the first lens component or the second lens component is replaced, the method for assembling the optical lens further includes: replacing the first lens component or the second lens component with another location. The second lens component or the first lens component is correspondingly paired to assemble an optical lens with an imaging quality standard.

According to another aspect of the present application, there is also provided a method for assembling a camera module, comprising: assembling an optical lens according to any one of the foregoing optical lens assembly methods; and mounting the optical lens on a photosensitive component, The camera module is obtained.

Compared with the prior art, this application has at least one of the following technical effects:

1. This application can improve the imaging quality of an optical lens or a camera module based on the realization of a variable aperture.

2. This application can reduce the height of the variable aperture optical lens or camera module (referring to the size in the direction of the optical axis).

3. This application can realize continuous adjustable aperture size.

4. This application can reduce the height of the variable aperture optical lens or camera module by designing the extension of the diaphragm housing.

5. The present application can use the top surface of the diaphragm housing as an actively calibrated sky surface, which helps to reduce the thickness of the top region of the second lens barrel, thereby reducing the height of the variable aperture optical lens or camera module.

BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments are shown in reference drawings. The embodiments and figures disclosed herein are to be regarded as illustrative rather than restrictive.

1 is a schematic cross-sectional view of an optical lens according to an embodiment of the present application;

FIG. 2 shows a schematic plan view of a variable diaphragm in an embodiment of the present application; FIG.

FIG. 3 shows a schematic diagram of changing the aperture of the iris diaphragm in an embodiment of the present application; FIG.

4 is a schematic cross-sectional view of an optical lens according to another embodiment of the present application;

5 is a schematic cross-sectional view of another embodiment of the present application;

6 is a schematic cross-sectional view of an optical lens in an embodiment of the present application;

FIG. 7 illustrates a camera module in an embodiment of the present application;

8A illustrates a relative position adjustment method in active calibration in an embodiment of the present application;

8B illustrates rotation adjustment in active calibration according to another embodiment of the present application;

FIG. 8C illustrates a relative position adjustment method in which v and w direction adjustments are added in active calibration according to another embodiment of the present application.

detailed description

In order to better understand the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the description, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

It should be noted that, in this specification, the expressions of the first, second, etc. are only used to distinguish one feature from another feature, and do not indicate any limitation on the feature. Therefore, without departing from the teachings of this application, the first subject discussed below may also be referred to as the second subject.

In the drawings, for convenience of explanation, the thickness, size, and shape of the object have been slightly exaggerated. The drawings are only examples and are not drawn to scale.

It should also be understood that the terms "including", "including", "having", "including" and / or "including" when used in this specification indicate the existence of stated features, wholes, steps, operations , Elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof. Furthermore, when an expression such as "at least one of" appears after the list of listed features, the entire listed feature is modified, rather than the individual elements in the list. In addition, when describing an embodiment of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" refers to an example or illustration.

As used herein, the terms "substantially", "approximately", and similar terms are used as table approximations, and are not used as table terms, and indicate that the measurement or Intrinsic deviations in calculated values.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (e.g. terms defined in commonly used dictionaries) should be interpreted to have a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense, unless This is clearly defined in this article.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The application will be described in detail below with reference to the drawings and embodiments.

FIG. 1 is a schematic cross-sectional view of an optical lens according to an embodiment of the present application. Referring to FIG. 1, the optical lens includes a first lens component 100, a second lens component 200, an iris 300, and a first glue 400. The first lens component 100 includes a first lens barrel 110 and a first lens group 120 installed in the first lens barrel 110. The first lens group 120 includes at least one first lens. The second lens component 200 includes a second lens barrel 210 and a second lens group 220 installed in the second lens barrel 210. The second lens group 220 includes at least one second lens. The first lens group 120 and the second lens group 220 together form an imageable optical system. The variable diaphragm 300 is located between the first lens component 100 and the second lens component 200. The first adhesive material 400 is located between the first lens component 100 and the variable aperture 300. The cured first glue 400 fixes and supports the first lens component 100 and the iris 300 so that the relative positions of the first lens component 100 and the second lens component 200 are maintained. Relative position determined during active calibration. The active calibration is to adjust the relative positions of the first lens component 100 and the second lens component 200 based on the actual imaging results of the optical system. The iris 300 and the second lens component 200 may be bonded together, and the bonding may be completed before the active calibration or after the active calibration. It will be further described below in combination with other embodiments.

Further, FIG. 2 shows a schematic top view of an iris diaphragm in an embodiment of the present application. Referring to FIG. 2, the iris diaphragm 300 includes a diaphragm case 310, a driving module (not shown in the drawings) housed in the diaphragm case 310, and a plurality of light connected to the driving module. Diaphragm 330. In this embodiment, the first adhesive material 400 is located between the top surface of the diaphragm case 310 and the bottom surface of the first lens component 100 (as shown in FIG. 1). FIG. 3 shows a schematic diagram of changing the aperture of the iris diaphragm in an embodiment of the present application. Referring to FIG. 3, it can be seen that after the diaphragm 330 is translated, the diaphragm is reduced relative to the diaphragm shown in FIG. 2. In other words, by translating a plurality of aperture plates 330, the size of the aperture can be changed, so that the aperture can be adjusted. In one embodiment, the size of the aperture is continuously adjustable.

It should be noted that although the first lens component 100 includes the first lens barrel 110 in the above embodiment, this application is not limited thereto. For example, in another embodiment, the first lens barrel 110 may be cancelled. The lens group 120 may be a single first lens, or may be composed of a plurality of first lenses that are integrated by being fitted or bonded to each other. In the active calibration process, when the first lens component has a first lens barrel, a clamp (or other pickup mechanism, such as a suction nozzle) can hold (or capture) the first lens barrel to adjust the position and attitude of the first lens component. When the first lens component does not have a first lens barrel, the clamp (or other pickup mechanism, such as a suction nozzle) can directly clamp (or pick up) the first lens group that has been integrated to adjust the position of the first lens component. And gesture.

Further, still referring to FIG. 1, in one embodiment, the top surface of the diaphragm housing 310 is a flat surface suitable for arranging the first glue material, and the variable diaphragm 300 passes through the second glue material. 500 is connected with the second lens component 200 to form an integrated body. The combination of the iris 300 and the second lens member 200 may be referred to as a second combination. In this embodiment, the top surface of the diaphragm case 310 can be used as a sky surface in an active calibration process to perform multi-point laser ranging, thereby identifying the position and posture of the entire second assembly. In this embodiment, since it is not necessary to perform multi-point ranging on the top surface of the second lens component (usually the top surface of the second lens barrel), the requirement for the flatness of the top surface of the second lens barrel can be reduced, and Helps reduce the height of the second lens component (height refers to the dimension in the optical axis direction of the optical lens). As shown in FIG. 1, the inner side of the second lens barrel has a plurality of steps, and a plurality of second lenses are sequentially embedded into the plurality of steps to form a second lens group. However, since the second lens group 220 bears on the top region 211 of the second lens barrel 210, if the top region 211 is too thin, the top surface of the second lens barrel 210 is liable to warp upward, and it is more likely to be a sky surface Point ranging will cause inaccurate pre-positioning, affecting the imaging quality and production yield of optical lenses. Therefore, it is generally necessary to ensure that the top region 211 of the second lens barrel 210 has a certain thickness to prevent the top surface of the second lens barrel from warping upward. In this embodiment, since the top surface of the diaphragm housing is used instead of the top surface of the second lens barrel as the sky surface, the requirement on the flatness of the top surface of the second lens barrel can be reduced, so that the second mirror can be made The top area of the barrel is thinner, which helps to reduce the height of the optical lens or camera module (height refers to the size in the optical axis direction of the optical lens). Herein, the celestial surface refers to a structural surface for identifying the position and attitude of the second lens group by performing multi-point ranging on the surface. The structural surface is usually a flat surface. In the existing active calibration process, the top surface of the second lens barrel is usually used as the sky surface.

Further, FIG. 4 is a schematic cross-sectional view of an optical lens according to another embodiment of the present application. Compared with the optical lens shown in FIG. 1, a variable diaphragm having a bent diaphragm case is used in this embodiment. Referring to FIG. 4, in this embodiment, the diaphragm case 310 is bent. The diaphragm housing 310 includes a flat plate-shaped base portion 311 located between the first lens member 100 and the second lens member 200, and an extension portion 312 located outside the second lens member 200. The flat base portion 311 is adapted to receive the root portions 331 of the plurality of diaphragm plates 330. The driving module is located in the extension portion 312. Each of the plurality of diaphragms 330 is adapted to be translated relative to the flat-plate-shaped base 311 under the driving of the driving module, so as to form apertures of different sizes. Referring to FIGS. 2 and 3, the root portion 331 of each diaphragm 330 can enter and extend out of the flat plate-shaped base portion 311, thereby changing the size of the diaphragm. In this embodiment, since the driving module is located in the extension portion, the flat-shaped base portion can be thinned, thereby helping to reduce the height of the optical lens or the camera module (the height refers to the dimension in the optical axis direction of the optical lens).

Further, FIG. 5 shows a schematic cross-sectional view of another embodiment of the present application. Referring to FIG. 5, in this embodiment, the second adhesive material position 500 is between an outer side surface of the second lens component 200 and the extension portion 312. The top surface of the second lens component 200 is not provided with an adhesive material for connecting the iris 300 and the second lens component 200. This embodiment can reduce the adhesive layer between the top surface of the second lens component 200 and the flat base portion 311, and therefore helps reduce the height of the optical lens or camera module (the height refers to the optical axis of the optical lens Dimension in the direction), thereby helping to reduce the total optical length (TTL) of the camera module.

Further, in one embodiment, the second rubber material may be replaced by a third rubber material. The third glue material is located between the variable aperture and the second lens component; the first glue material is adapted to fix and support the first lens component and the variable aperture after curing The third glue material is suitable for fixing and supporting the variable aperture and the second lens component after curing, and the support of the first glue material and the third glue material makes the first glue material The relative position of the lens component and the second lens component is maintained at the relative position determined by the active calibration. The active calibration is to adjust a relative position of the first lens component and the second lens component based on an actual imaging result of the optical system. The material of the third glue material may be the same as that of the first glue material. The material of the first glue material and / or the third glue material may be different from that of the second glue material.

Further, in an embodiment, the first lens group is located at a front end of the second lens group. The number of the first lenses is not greater than two. In other words, the iris is located between the first lens and the second lens from the front end, or between the second lens and the third lens from the front end. Preferably, the aperture stop of the optical lens is arranged at a position that is most sensitive to the entire optical system, and in a general optical design, the three front lenses and the combination thereof are most sensitive to the entire optical system.

Further, in one embodiment, the variable diaphragm includes at least two diaphragms. The driving module is the diaphragm driving structure, and the driving mode can be a shape memory alloy driver (SMA driver), a micro-electromechanical system (MEMS), and a piezoelectric ceramic driver. Driven by the diaphragm driving structure, the size of the through-holes formed by the diaphragms can be continuously adjusted; the diaphragms are preferably symmetrically distributed (the central angle between the diaphragms is equal).

According to an embodiment of the present application, a corresponding camera module is further provided, which may include the optical lens described in any one of the foregoing embodiments. The camera module can be a fixed focus module, an auto focus module, or a zoom module.

According to an embodiment of the present application, a corresponding method for assembling an optical lens is also provided, which includes steps S100-S300.

Step S100, pre-positioning the first lens component and the second lens component, wherein the first lens component and the second lens component are separated from each other, the first lens component includes a first lens group, and the first lens component The lens group includes at least one first lens, the second lens component includes a second lens barrel and a second lens group installed in the second lens barrel, and the second lens group includes at least one second lens, so The pre-positioning enables the first lens group and the second lens group to form an imageable optical system together.

Step S200, performing active calibration on the first lens component and the second lens component, wherein the active calibration is based on the actual imaging result of the optical system to calibrate the first lens component and the second lens The relative position of the components is adjusted.

In step S300, the first lens component and the second lens component are fixed and supported by adhesive bonding, so that the relative positions of the two are maintained at the relative positions determined by active calibration, and A variable diaphragm is provided in a gap between the second lens member and the second lens member.

In one embodiment, the variable diaphragm is disposed on the top of the second lens component to form a second assembly. In the pre-positioning (ie step S100), the first lens component and the second lens component are pre-positioned by adjusting the relative positions of the first lens component and the second assembly. In the active calibration (ie step S200), the first lens component and the second lens component are actively calibrated by adjusting the relative positions of the first lens component and the second assembly. In the glue material bonding (ie, step S300), the first lens component and the second lens component are fixed and supported by bonding the top surface of the variable diaphragm and the bottom surface of the first lens component. Lens parts. FIG. 6 is a schematic cross-sectional view of an optical lens in an embodiment of the present application. The second diaphragm 900 is first fixed on the top of the second lens component to form a second combined body 900, and then the second combined body 900 as a whole is pre-positioned, actively calibrated, and bonded with the first lens component.

Further, in one embodiment, the variable diaphragm includes a diaphragm housing, a driving module housed in the diaphragm housing, and a plurality of diaphragm plates connected to the driving module, wherein The top surface of the diaphragm case is a flat surface. In the predetermined position (that is, step S100), the position and posture of the second assembly are identified by performing multi-point ranging on the top surface of the diaphragm case, thereby completing the predetermined position.

Further, in one embodiment, the diaphragm housing includes a flat plate-shaped base adapted to be disposed between the first lens member and the second lens member, and is adapted to be disposed on the second lens member. An outer extension portion, and the variable diaphragm is fixed to the second lens member by bonding an outer side surface of the second lens member and the extension portion.

In another embodiment, the iris and the second lens member may be separated from each other. In the bonding of the glue material (that is, step S300), the variable diaphragm and the second lens component are bonded by the glue material, and the first lens component and the variable light are bonded by the glue material. After the glue is cured, the relative position of the first lens component and the second lens component is maintained at the relative position determined by active calibration. In other words, in this embodiment, an iris can be arranged in the gap between the first lens component and the second lens component after the active calibration is completed. Because the iris is arranged using the gap of active calibration, it helps to reduce the height of the optical lens or camera module (height refers to the size in the optical axis direction of the optical lens).

Further, in one embodiment, in the active calibration (ie step S200), when the imaging quality of the optical system after the active calibration still fails to meet the standard, the first lens component or the first lens component is replaced. Two lens parts. After replacing the first lens component or the second lens component, the method for assembling the optical lens further includes: replacing the first lens component or the second lens component that is replaced with other ones The second lens component or the first lens component is paired correspondingly to assemble an optical lens with an imaging quality standard.

According to an embodiment of the present application, a corresponding camera module assembling method is also provided, which includes: assembling an optical lens according to the optical lens assembling method of any of the foregoing embodiments; and mounting the optical lens on a photosensitive component to obtain an image Module. FIG. 7 illustrates a camera module in an embodiment of the present application. The camera module can be a fixed focus module, an auto focus module, or a zoom module. When the camera module is a non-fixed focus module, the optical lens may be first mounted in a motor carrier (the motor carrier is a movable part of the motor), and then mounted on the photosensitive component through the motor.

The following will further introduce the active calibration process used in the assembly method of the optical lens or camera module.

The active calibration described in this application can adjust the relative positions of the first lens component and the second lens component in multiple degrees of freedom. FIG. 8A illustrates a relative position adjustment method in active calibration according to an embodiment of the present application. In this adjustment mode, the first lens component (also a first lens) can be moved in the x, y, and z directions relative to the second lens component (that is, the relative position adjustment in this embodiment has three Degrees of freedom). The z direction is a direction along the optical axis, and the x and y directions are directions perpendicular to the optical axis. Both the x and y directions are in an adjustment plane P, and the translation in the adjustment plane P can be decomposed into two components in the x and y directions.

FIG. 8B illustrates a rotation adjustment in active calibration according to another embodiment of the present application. In this embodiment, in addition to the three degrees of freedom of FIG. 8A, the relative position adjustment also increases the degree of freedom of rotation, that is, the adjustment in the r direction. In this embodiment, the adjustment in the r direction is a rotation in the adjustment plane P, that is, a rotation about an axis perpendicular to the adjustment plane P.

Further, FIG. 8C illustrates a relative position adjustment method in which v and w direction adjustments are added in active calibration according to another embodiment of the present application. Among them, the v direction represents the rotation angle of the xoz plane, the w direction represents the rotation angle of the yoz plane, and the rotation angles of the v direction and the w direction can be combined into a vector angle, and this vector angle represents the total tilt state. That is, by adjusting the v and w directions, the tilting attitude of the first lens component relative to the second lens component (that is, the optical axis of the first lens component relative to the optical axis of the second lens component can be adjusted) The tilt).

The above-mentioned adjustments of the six degrees of freedom of x, y, z, r, v, and w may all affect the imaging quality of the optical system (for example, affect the resolution). In other embodiments of the present application, the relative position adjustment method may be to adjust only any one of the above six degrees of freedom, or a combination of any two or more of them.

Further, in one embodiment, in the active calibration step, the adjustment of the relative positions of the first lens component and the second lens component includes translation on the adjustment plane, that is, movement in the x and y directions.

Further, in one embodiment, in the active calibration step, adjusting the relative position of the first lens component and the second lens component further includes: adjusting and determining the axis of the first lens component according to the measured resolution of the optical system. The angle with respect to the axis of the second lens component, that is, adjustment in the w and v directions. In the assembled optical lens or camera module, an angle between the axis of the first lens component and the axis of the second lens component may be non-zero.

Further, in one embodiment, in the active calibration step, adjusting the relative position of the first lens component and the second lens component further includes: moving the first lens component (i.e., z) in a direction perpendicular to the adjustment plane. Adjustment in the direction), according to the measured resolution of the optical system, determine the relative position between the first lens component and the second lens component in a direction perpendicular to the adjustment plane.

Further, in an embodiment, the first lens component may not have a first lens barrel. For example, the first lens component may be composed of a single first lens. Before the active calibration, first correspond to the predetermined position, so that there is a gap between the bottom surface of the first lens and the top surface of the second lens component; Allow the glue to cure. In this embodiment, the first lens may be formed by a plurality of sub-lenses that are fitted or bonded to each other to form a whole. In this embodiment, a side surface and a top surface of the non-optical surface of the first lens that are not used for imaging may form a light shielding layer. The light-shielding layer may be formed by screen-printing a light-shielding material on a side surface and a top surface of the first lens.

In one embodiment, in the active calibration step, the second lens component may be fixed, the first lens component may be clamped by a clamp, and the first lens component may be moved by a six-axis movement mechanism connected to the clamp, thereby realizing the first Relative movement between the lens component and the second lens component in the above six degrees of freedom. Wherein, the jig can be abutted or partially abutted on the side of the first lens component, thereby clamping the first lens component and performing multi-degree of freedom position adjustment.

The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution of the specific combination of the above technical features, but should also cover the above technical features without departing from the inventive concept. Or other technical solutions formed by any combination of equivalent features. For example, a technical solution formed by replacing the above features with technical features disclosed in the present application (but not limited to) with similar functions.

Claims

The optical lens is characterized by comprising:

A first lens component including a first lens group, the first lens group including at least one first lens;

A second lens component including a second lens barrel and a second lens group installed in the second lens barrel, the second lens group including at least one second lens, the first lens group and the first lens group The two lens groups together form an imageable optical system; and

An iris, which is located between the first lens component and the second lens component, and the first lens component, the second lens component, and the iris are bonded to each other by an adhesive material together.
The optical lens according to claim 1, wherein the variable diaphragm comprises: a diaphragm case, a driving module housed in the diaphragm case, and a plurality of diaphragms connected to the driving module. sheet.
The optical lens according to claim 2, characterized in that the optical lens further comprises a first glue material, which is located between the first lens part and the variable aperture, and the first glue material is suitable. After the curing, the first lens part and the iris are fixed and supported so that the relative positions of the first lens part and the second lens part are maintained at the relative positions determined by active calibration, where The active calibration adjusts a relative position of the first lens component and the second lens component based on an actual imaging result of the optical system.
The optical lens according to claim 3, wherein the first adhesive material is located between a top surface of the diaphragm case and a bottom surface of the first lens member.
The optical lens according to claim 1, wherein the first lens component further comprises a first lens barrel, and the first lens group is installed in the first lens barrel.
The optical lens according to claim 3, wherein a top surface of the diaphragm case is a flat surface suitable for arranging the first glue material.
The optical lens according to claim 3, wherein the variable diaphragm is connected to the second lens member through a second adhesive material to form a second assembly, and a top surface of the diaphragm housing is suitable. A flat surface for identifying the position and posture of the second assembly through multi-point ranging.
The optical lens according to claim 7, wherein the diaphragm housing includes a flat plate-like base portion located between the first lens member and the second lens member, and is located outside the second lens member Extension.
The optical lens according to claim 8, wherein the flat base is adapted to receive the roots of the plurality of diaphragms, and the driving module is located in the extension, and the plurality of diaphragms Each of them is adapted to translate relative to the flat-shaped base portion under the driving of the driving module to form apertures of different sizes.
The optical lens according to claim 1, wherein the aperture is an aperture whose aperture size is continuously adjustable.
The optical lens according to claim 8, wherein the diaphragm case is bent, and the second adhesive material is located between an outer side surface of the second lens member and the extension portion.
The optical lens according to claim 11, wherein the top surface of the second lens member is not provided with an adhesive material for connecting the variable diaphragm and the second lens member.
The optical lens according to claim 3, further comprising a third glue material, the third glue material being located between the variable diaphragm and the second lens member; the third glue material It is suitable for fixing and supporting the variable diaphragm and the second lens member after curing, and the support of the first glue material and the third glue material makes the first lens member and the second lens material The relative position of the lens components is maintained at the relative position determined by the active calibration.
The optical lens according to claim 1, wherein the first lens group is located at a front end of the second lens group.
The optical lens according to claim 14, wherein the number of the first lenses is not greater than two.
A camera module, comprising the optical lens according to any one of claims 1-15.
An optical lens assembly method, comprising:

The first lens component and the second lens component are pre-positioned, wherein the first lens component and the second lens component are separated from each other, the first lens component includes a first lens group, and the first lens group includes At least one first lens, the second lens component includes a second lens barrel and a second lens group installed in the second lens barrel, the second lens group includes at least one second lens, the predetermined position So that the first lens group and the second lens group together constitute an imageable optical system;

Performing active calibration on the first lens component and the second lens component, wherein the active calibration is based on the actual imaging results of the optical system to relative positions of the first lens component and the second lens component Make adjustments; and

The first lens part and the second lens part are fixed and supported by adhesive bonding, so that the relative positions of the two are maintained at the relative positions determined by active calibration, and the first lens part and the second lens part are fixed. An iris is provided in a gap between the second lens members.
The method for assembling an optical lens according to claim 17, wherein providing the iris diaphragm comprises: fixing the iris diaphragm on the top of the second lens member to constitute a second assembly.
The method for assembling an optical lens according to claim 18, wherein in the predetermined position, the first lens component and the second lens component are adjusted by adjusting the relative positions of the first lens component and the second combination body. The second lens component performs the predetermined positioning.
The method for assembling an optical lens according to claim 19, wherein in the active calibration, the first lens component and the second lens component are adjusted by adjusting the relative positions of the first lens component and the second combination body. The second lens component performs the active calibration; and

In the glue material bonding, the first lens component and the second lens component are fixed and supported by bonding a top surface of the variable diaphragm and a bottom surface of the first lens component.
The method for assembling an optical lens according to claim 19, wherein the iris diaphragm includes a diaphragm case, a driving module housed in the diaphragm case, and a plurality of light connected to the driving module. A diaphragm, wherein the top surface of the diaphragm housing is a flat surface;

In the pre-positioning, the multi-point distance measurement is performed on the top surface of the diaphragm housing to identify the position and posture of the second combination body, thereby completing the pre-positioning.
The method for assembling an optical lens according to claim 18, wherein the diaphragm housing comprises a flat plate-shaped base portion adapted to be arranged between the first lens member and the second lens member, and is adapted to arrange An extension portion outside the second lens member, and the variable diaphragm is fixed to the second lens member by bonding an outer side surface of the second lens member and the extension portion.
The optical lens assembling method according to claim 17, wherein the variable diaphragm and the second lens member are separated from each other; and

In the glue material bonding, the variable diaphragm and the second lens member are bonded by a glue material, and the first lens member and the variable diaphragm are bonded by a glue material, and the glue After the material is cured, the relative positions of the first lens component and the second lens component are maintained at the relative positions determined by the active calibration.
The method for assembling an optical lens according to claim 17, wherein in the active calibration, when the imaging quality of the optical system after the active calibration still fails to meet the standard, the first lens component or Mentioned second lens component.
The method for assembling an optical lens according to claim 24, wherein after replacing the first lens component or the second lens component, the method for assembling an optical lens further comprises:

Match the replaced first lens component or the second lens component with other second lens components or the first lens component, respectively, to assemble an optical lens with an imaging quality standard.
The method for assembling a camera module is characterized in that it includes:

Assembling an optical lens according to the optical lens assembling method according to any one of claims 17 to 25; and

The optical lens is mounted on a photosensitive component to obtain the camera module.