CN115542499A

CN115542499A - Assembling method of optical lens, camera module and electronic equipment

Info

Publication number: CN115542499A
Application number: CN202110726789.9A
Authority: CN
Inventors: 吴军; 申晓凯
Original assignee: Nanchang OFilm Optoelectronics Technology Co Ltd
Current assignee: Nanchang OFilm Optoelectronics Technology Co Ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-12-30

Abstract

The invention relates to the technical field of cameras and discloses an assembling method of an optical lens, a camera and electronic equipment. By the method, the accuracy of the SFR result of the optical lens and the assembly yield can be improved.

Description

Assembling method of optical lens, camera module and electronic equipment

Technical Field

The present invention relates to the field of camera technologies, and in particular, to an assembling method of an optical lens, a camera, and an electronic device.

Background

With the continuous improvement of shooting requirements of users on electronic equipment, the number of lenses of a camera of the electronic equipment is also increased continuously so as to obtain higher pixels and larger apertures. In the related art, a camera with a large number of lenses is generally set in a lens grouping manner, a plurality of lenses are divided into a plurality of lens groups, the lens groups and a plurality of carriers for mounting the lens groups are placed on a jig during assembly, and the lens groups and the carriers are fixed in a dispensing manner after being positioned by the jig.

However, in the positioning method using the jig, since the tolerance exists in the outer dimensions of each component, the accumulated tolerance after assembly is large, and the optical axis deviation of the plurality of lens groups is large, so that the result of the SFR (Spatial Frequency Response, image analysis force algorithm) of the camera is inaccurate, and the assembly yield of the camera is affected.

Disclosure of Invention

The embodiment of the invention discloses an assembling method of an optical lens, a camera and electronic equipment.

In a first aspect, an embodiment of the present invention discloses an assembly method of an optical lens, where the optical lens includes a first carrier, a second carrier, a first lens group, and a second lens group, the first carrier is provided with a first groove, a second groove, and a first light hole communicating the first groove and the second groove, the second carrier is movably disposed in the second groove, the second carrier is provided with a third groove and a second light hole communicating the third groove and the first light hole, and the second light hole is coaxially disposed with the first light hole, the method includes:

acquiring the positions of the first mirror group and the first carrier by using a position recognition camera;

moving the first mirror group into the first groove according to the position of the first mirror group and the position of the first carrier, and enabling the center of the first mirror group and the center of the first light through hole to coincide on the optical axis of the optical lens;

acquiring positions of the second mirror group and the second carrier with a position recognition camera;

moving the second mirror group into the third groove according to the position of the second mirror group and the position of the second carrier, and enabling the center of the second mirror group and the center of the second light through hole to coincide on the optical axis of the optical lens;

acquiring a relative inclination angle of the first mirror group and the first carrier by using a collimator;

adjusting the first mirror group according to the relative inclination angle of the first mirror group and the first carrier, so that the optical axis of the first mirror group is coincident with the hole axis of the first light through hole, and a first gap is formed between the first mirror group and the first groove;

acquiring a relative inclination angle of the second mirror group and the second carrier by using a collimator;

adjusting the second mirror group according to the relative inclination angle of the second mirror group and the second carrier, so that the optical axis of the second mirror group is superposed with the hole axis of the second light through hole, and a second gap is formed between the second mirror group and the third groove;

adding bonding media to the first gap and the second gap, respectively;

and respectively curing the bonding media positioned in the first gap and the second gap.

By implementing the assembling method, the optical axis of the first lens group of the optical lens can be coincided with the optical axis of the second lens group, so that the accuracy of an image resolution algorithm of the optical lens is improved, and the assembling yield of the optical lens is high.

As an optional implementation manner, in an embodiment of the present invention, the acquiring the positions of the first mirror group and the first carrier by using a position recognition camera includes:

recognizing a first characteristic circle of the surface of the first mirror group facing the object side by using a position recognition camera and calculating the coordinate position of the center of the first characteristic circle;

and recognizing the first light through hole by using a position recognition camera and calculating the circle center coordinate position of the first light through hole.

The assembly precision of the first mirror group and the first carrier can be improved by acquiring the coordinate positions of the circle centers of the first characteristic circle and the first light through hole.

As an optional implementation manner, in an embodiment of the present invention, the acquiring the positions of the second mirror group and the second carrier by using the position recognition camera includes:

identifying a second characteristic circle of the surface of the second lens group facing the image side by using a position identification camera and calculating the coordinate position of the center of the second characteristic circle;

and recognizing the second light through hole by using a position recognition camera and calculating the coordinate position of the circle center of the second light through hole.

The assembly precision of the second mirror group and the second carrier can be improved by obtaining the coordinate positions of the centers of the second characteristic circle and the second light through hole.

As an optional implementation manner, in an embodiment of the present invention, the acquiring, by using a collimator, a relative tilt angle between the first mirror group and the first carrier includes:

and acquiring a first inclination angle between the surface of the first mirror group facing the object side and the end surface of the first carrier facing the object side by using a collimator.

The assembly accuracy of the first mirror group and the first carrier can be further improved by the first inclination angle.

As an optional implementation manner, in an embodiment of the present invention, the acquiring, by using a collimator, a relative tilt angle of the second mirror group and the second carrier includes:

and acquiring a second inclination angle between the surface of the second lens group facing the image side and the end face of the second carrier facing the image side by using the collimator.

The second inclination angle can further improve the assembly precision of the second mirror group and the second carrier.

As an optional implementation manner, in an embodiment of the present invention, before the acquiring the positions of the first mirror group and the second mirror group by using the position recognition camera, the method further includes:

and moving the second carrier to enable the surface of the second carrier facing the first light through hole to abut against the bottom surface of the first groove.

The surface of the second carrier facing the first light through hole is abutted to the bottom surface of the first groove, so that the condition that the SFR result of the optical lens is inaccurate and the assembly yield of the optical lens is influenced due to relative movement of the second carrier and the first carrier can be avoided.

As an optional implementation manner, in an embodiment of the present invention, the optical lens further includes a driving component, and the driving component is configured to drive the second carrier to move relative to the first carrier.

By moving the second carrier by means of the driving means such that the surface of the second carrier facing the first light passing hole abuts against the bottom surface of the first recess, the implementation of the assembly method is facilitated by means of the components of the optical lens itself, as appropriate.

As an optional implementation manner, in an embodiment of the present invention, the first carrier is provided with a first dispensing opening communicated to a middle position of the first gap, and the second carrier is provided with a second dispensing opening communicated to a middle position of the second gap;

the adding of the bonding medium to the first gap and the second gap, respectively, includes:

and respectively adding bonding media to the first dispensing opening and the second dispensing opening so as to distribute the bonding media in the middle position of the first gap and the middle position of the second gap.

Connect to the middle part position in first clearance through first some jiao kou for bonding medium can follow first some jiao kou and add and distribute in the intermediate position in first clearance, avoid bonding medium deformation and lead to the condition that first mirror crowd produced the position change relatively first carrier to take place, connect to the middle part position in second clearance through second some jiao kou simultaneously, make bonding medium can follow second some jiao kou and add and distribute in the intermediate position in second clearance, avoid bonding medium deformation and lead to the condition that second mirror crowd produced the position change relatively second carrier to take place, can improve optical lens's SFR result degree of accuracy and equipment yield.

In a second aspect, an embodiment of the present invention discloses an optical lens, which is assembled by using the assembly method of the first aspect. It can be understood that, when the optical lens of the second aspect is assembled by the assembling method of the first aspect, the SFR result accuracy and the assembly yield of the optical lens are high.

In a third aspect, an embodiment of the present invention discloses a camera module, which includes a photosensitive assembly and the optical lens of the second aspect, where the photosensitive assembly is disposed on an image side of the optical lens. It can be understood that the camera module of the third aspect has the beneficial effects of the optical lens of the second aspect.

In a fourth aspect, an embodiment of the present invention discloses an electronic device, which includes a device main body and the camera module of the third aspect, where the camera module is disposed in the device main body. It is understood that the electronic apparatus of the fourth aspect has the advantageous effects of the camera module of the third aspect.

Compared with the prior art, the embodiment of the invention at least has the following beneficial effects:

in the embodiment of the invention, the positions of a first mirror group, a first carrier, a second mirror group and a second carrier are obtained through a position recognition camera, the first mirror group and the second mirror group are respectively moved into a first groove and a third groove by utilizing the positions, the center of the first mirror group is superposed with the center of a first light through hole, the center of the second mirror group is superposed with the center of a second light through hole, the relative inclination angles of the first mirror group and the first carrier and the relative inclination angles of the second mirror group and the second carrier are obtained through a collimator, the first mirror group is adjusted to enable the optical axis of the first mirror group to be superposed with the hole axis of the first light through hole by utilizing the relative inclination angles, a first gap is formed between the first mirror group and the first groove, the second mirror group is adjusted to enable the optical axis of the second mirror group to be superposed with the hole axis of the second light through hole, a third gap is formed between the second mirror group and the third groove, bonding media are respectively added into the first gap and the second gap, and the bonding media positioned in the first gap and the second gap are respectively, so as to realize the assembly of the optical lens. By implementing the assembling method, the optical axis of the first lens group of the optical lens can be coincided with the optical axis of the second lens group, so that the accuracy of the image resolution algorithm of the optical lens is improved, and the assembling yield of the optical lens is high.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a flowchart illustrating a method for assembling an optical lens according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an optical lens according to an embodiment of the disclosure;

FIG. 3 is an exploded view of the optical lens of FIG. 2;

FIG. 4 isbase:Sub>A schematic sectional view taken along line A-A in FIG. 2;

FIG. 5 is a schematic sectional view taken along line B-B in FIG. 2;

FIG. 6 is a schematic view of the structure of FIG. 3 from another perspective;

fig. 7 is a schematic structural diagram of a camera module according to a second embodiment of the present invention;

fig. 8 is a schematic structural diagram of an electronic device according to a third embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Moreover, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific type and configuration may or may not be the same), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The invention discloses an assembling method of an optical lens, a camera and electronic equipment.

Example one

Fig. 1 is a schematic flow chart illustrating an assembling method of an optical lens 1 according to an embodiment of the present invention. As shown in fig. 2 and 3, the optical lens 1 includes a first carrier 10, a second carrier 11, a first mirror group 12 and a second mirror group 13, the first carrier 10 is provided with a first groove 10a, a second groove 10b and a first light-passing hole 10c communicating the first groove 10a and the second groove 10b, the second carrier 11 is movably disposed in the second groove 10b, the second carrier 11 is provided with a third groove 11a and a second light-passing hole 11b communicating the third groove 11a and the first light-passing hole 10c, and the second light-passing hole 11b is coaxially disposed with the first light-passing hole 10 c.

The first carrier 10 is a cuboid, the first groove 10a and the second groove 10b are respectively arranged at two ends of the first carrier 10, the first light through hole 10c is positioned between the first groove 10a and the second groove 10b, the second carrier 11 is a U-shaped whole, the hollow part of the U-shaped is the third groove 11a, the second light through hole 11b is arranged at the bottom of the U-shaped, and the second carrier 11 is movably arranged in the second groove 10b and can be connected through a suspension wire or a spring plate and other structures. The first groove 10a is used for accommodating the first mirror group 12, and the third groove 11a is used for accommodating the second mirror group 13.

Specifically, two opposite groove walls of the first groove 10a are respectively provided with a first limiting portion 10e, and a surface of the first limiting portion 10e facing the first mirror group 12 accommodated in the first groove 10a is an arc surface, and the arc surface is matched with the peripheral side surface of the first mirror group 12. It can be understood that, by providing the first position-limiting portion 10e, the first mirror group 12 is limited to move into the first groove 10a during assembly, that is, the first mirror group 12 enters the first groove 10a along a direction opposite to the direction of the arc surface of the first position-limiting portion 10e or along a direction opposite to the direction of the bottom surface of the first groove 10a, which has a fool-proof effect.

Two opposite groove walls of the third groove 11a are respectively provided with a second limiting portion 11d, and the surface of the second limiting portion 11d facing the second mirror group 13 accommodated in the third groove 11a is an arc surface matched with the peripheral side surface of the second mirror group 13. It can be understood that, by providing the second position-limiting portion 11d, the direction of the second mirror group 13 moving into the third groove 11a during assembly is limited, that is, the second mirror group 13 enters the third groove 11a along the direction opposite to the direction of the arc surface of the second position-limiting portion 11d or along the direction opposite to the direction of the bottom surface of the third groove 11a, which has the fool-proofing effect.

Illustratively, the optical lens 1 may be a zoom lens. The optical lens 1 may further include a third lens group 14 and a third carrier 15, the first carrier 10 is slidably connected to the third carrier 15, and the third lens group 14 is mounted on the third carrier 15. The first mirror group 14 is located at one end of the third carrier 15, the first carrier 10 is located below the first mirror group 14, and the optical axes of the first mirror group 12, the second mirror group 13, and the third mirror group 14 are overlapped.

The first carrier 10 may be a part for carrying the first mirror group 12 on a support or a drive for carrying the first mirror group 12, and the second carrier 11 may be a part for carrying the second mirror group 13 on a support or a drive for carrying the second mirror group 13. The third carrier 15 may be a part for carrying the third mirror group 14 on a carriage or a drive for carrying the third mirror group 14.

It is understood that, before the assembly method is implemented, the first carrier 10 and the second carrier 11 of the lens assembly 1 are assembled, that is, the first carrier 10 is movably connected to the second carrier 11, and the second light hole 11b is coaxially arranged with the first light hole 10 c. The assembling method of the present embodiment is mainly used for assembling the first mirror group 12 and the second mirror group 13 of the optical lens 1 to the first carrier 10 and the second carrier 11.

The assembling method comprises the following steps:

101. the positions of the first mirror group 12 and the first carrier 10 are acquired with a position recognition camera.

It will be appreciated that the assembly method of the present embodiment may be implemented on automated equipment. Taking the position of the first mirror group 12 as an example for explanation, the workbench of the automation device has a preset spatial coordinate system, and the position of the first mirror group 12 refers to a position of the first mirror group 12 on the workbench of the automation device, that is, the position of the first mirror group 12 acquired by the position recognition camera can be represented by coordinates of the spatial coordinate system, and the positions of the other optical lens 1 mentioned in this embodiment (for example, the first carrier 10, the first mirror group 12, and the second carrier 11) can be represented by coordinates of the spatial coordinate system, which is not described in detail.

That is to say, in the step 101, the position recognition camera is used to acquire the positions of the first mirror group 12 and the first carrier 10, the positions of the first mirror group 12 and the first carrier 10 can be represented by coordinates of a spatial coordinate system, the accuracy of the positions is high, and the relative positions of the first mirror group 12 and the first carrier 10 can be known through the coordinates of the first mirror group 12 and the first carrier 10, so that the first mirror group 12 can be moved to a position meeting the design requirement of the optical lens 1 conveniently, and the accuracy is high.

102. The first mirror group 12 is moved into the first groove 10a according to the position of the first mirror group 12 and the position of the first carrier 10, and the center of the first mirror group 12 and the center of the first light passing hole 10c are made to coincide on the optical axis 1a of the optical lens 1.

It should be noted that the center of the first mirror group 12 refers to an optical center of the first mirror group 12, which is located on the optical axis of the first mirror group 12 and is not the shape center of the first mirror group 12. Similarly, in this embodiment, the centers are optical centers except that the center of a particular shape (e.g., a circle, rectangle, etc.) is described as the center of the shape.

It can be understood that, when step 102 is implemented, the optical lens 1 is not assembled, the positions of the first lens group 12 and the second lens group 13 are not determined, and then there is no optical axis, the optical axis 1a of the optical lens 1 mentioned in step 102 is actually a theoretical optical axis of the optical lens 1 in design, a straight line where the theoretical optical axis is located coincides with the center of the first light through hole 10c, and a straight line where the theoretical optical axis is located coincides with the center of the second light through hole 11b, and the optical axis 1a of the optical lens 1 mentioned in other steps of this embodiment is the same as the optical axis 1a of the optical lens 1 in step 102, and can be understood as the theoretical optical axis in design, and is not described in detail again.

In other words, the step 102 of making the center of the first mirror group 12 coincide with the center of the first light passing hole 10c on the optical axis 1a of the optical lens 1 actually means that the center of the first mirror group 12 coincides with a straight line where the center of the first light passing hole 10c is located at the center of the first light passing hole 10c and the center of the second light passing hole 11 b. Therefore, the center of the first mirror group 12 and the center of the first light through hole 10c are overlapped on the optical axis 1a of the optical lens 1 only by moving the first mirror group 12 according to the position of the first mirror group 12 and the position of the first carrier 10, so that the center of the first mirror group 12 is located on the optical axis 1a of the optical lens 1, the center of the first mirror group 12 and the center of the first light through hole 10c are overlapped on the optical axis 1a of the optical lens 1, in this process, the position of the center of the first mirror group 12 is a unique variation, and the positions of the center of the first light through hole 10c and the optical axis 1a of the optical lens 1 are fixed, which is a difficult implementation of step 102 and has high efficiency.

103. The positions of the second mirror group 13 and the second carrier 11 are acquired with a position recognition camera.

It can be understood that, in this step 103, the position recognition camera is used to acquire the positions of the second mirror group 13 and the second carrier 11, the positions of the second mirror group 13 and the second carrier 11 can be represented by coordinates of a spatial coordinate system, the accuracy of the positions is high, and the relative positions of the second mirror group 13 and the second carrier 11 can be known through the coordinates of the second mirror group 13 and the second carrier 11, so that the second mirror group 13 can be moved to a position meeting the design requirement of the optical lens 1 with high accuracy.

104. The second mirror group 13 is moved into the third groove 11a according to the position of the second mirror group 13 and the position of the second carrier 11, and the center of the second mirror group 13 and the center of the second light passing hole 11b are made to coincide on the optical axis 1a of the optical lens 1.

It is understood that, in the step 104, making the center of the second mirror group 13 coincide with the center of the second light passing hole 11b on the optical axis 1a of the optical lens 1 actually means making the center of the second mirror group 13 coincide with a straight line where the center of the second light passing hole 11b is located at the center of the first light passing hole 10c and the center of the second light passing hole 11 b. Therefore, the center of the second mirror group 13 and the center of the second light passing hole 11b are overlapped on the optical axis 1a of the optical lens 1 only by moving the second mirror group 13 according to the position of the second mirror group 13 and the position of the second carrier 11, so that the center of the second mirror group 13 is located on the optical axis 1a of the optical lens 1, the center of the second mirror group 13 and the center of the second light passing hole 11b are overlapped on the optical axis 1a of the optical lens 1, the position of the center of the second mirror group 13 is a unique variation in the process, and the positions of the center of the second light passing hole 11b and the optical axis 1a of the optical lens 1 are fixed, and the step 104 is difficult to implement and has high efficiency.

It can be known that steps 101 and 102 are to make the center of the first mirror group 12 and the center of the first light passing hole 10c coincide on the optical axis 1a of the optical lens 1, and steps 103 and 104 are to make the center of the second mirror group 13 and the center of the second light passing hole 11b coincide on the optical axis 1a of the optical lens 1. Step 102 needs to be implemented after step 101, step 104 needs to be implemented after step 102, and steps 101 and 102 and

steps

103 and 104 do not affect each other, and the implementation order can be reversed or implemented simultaneously. In some other embodiments, the implementation sequence of the above steps may be 101, 103, 102, 104,103, 101, 102, 104,103, 104, 101, 102, or after implementing 101 and 103 simultaneously, implementing 102 and 104 simultaneously, which is not particularly limited in this embodiment and may be selected according to the actual situation. And when a mode that a plurality of steps are simultaneously carried out is adopted, the efficiency of the assembling method can be improved.

105. The relative tilt angles of the first mirror group 12 and the first carrier 10 are obtained by means of collimators.

It can be understood that the relative inclination angle can represent an included angle between an optical axis of the first mirror group 12 and a hole axis of the first light passing hole 10c of the first carrier 10, the relative inclination angle between the first mirror group 12 and the first carrier 10 obtained by the collimator can be represented by a vector included angle in a space coordinate system, the accuracy of the relative inclination angle is high, and the first mirror group 12 can be adjusted on the premise of keeping the first carrier 10 motionless through the relative inclination angle between the first mirror group 12 and the first carrier 10, so that the relative inclination angle between the first mirror group 12 and the first carrier 10 is adjusted to an angle meeting design requirements, and the accuracy is high.

106. The first mirror group 12 is adjusted according to the relative inclination angle of the first mirror group 12 and the second carrier 11, so that the optical axis of the first mirror group 12 coincides with the hole axis of the first light passing hole 10c, and a first gap 1b is formed between the first mirror group 12 and the first groove 10 a.

It can be understood that the hole axis of the first light passing hole 10c passes through the center of the first light passing hole 10c, the first light passing hole 10c and the second light passing hole 11b are coaxially arranged, the hole axis of the second light passing hole 11b passes through the center of the second light passing hole 11b, and then the hole axis of the first light passing hole 10c and the hole axis of the second light passing hole 11b both coincide with the optical axis 1a of the optical lens 1. By performing step 106, the optical axis of the first mirror group 12 coincides with the hole axis of the first light passing hole 10c, so that the optical axis of the first mirror group 12 coincides with the optical axis 1a of the optical lens 1.

The first gap 1b can provide a space for an adhesive medium, so that the adhesive medium can adhere the first mirror group 12 in the first groove 10a, thereby realizing the assembly of the first mirror group 12 and the first carrier 10.

107. The relative tilt angles of the second mirror group 13 and the second carrier 11 are obtained by means of collimators.

It can be understood that the relative inclination angle can represent an included angle between an optical axis of the second mirror group 13 and a hole axis of the second light passing hole 11b of the second carrier 11, the relative inclination angle of the second mirror group 13 and the second carrier 11 obtained by the collimator can be represented by a vector included angle in a space coordinate system, the accuracy of the relative inclination angle is high, and the second mirror group 13 can be adjusted on the premise of keeping the second carrier 11 motionless through the relative inclination angle of the second mirror group 13 and the second carrier 11, so that the relative inclination angle of the second mirror group 13 and the second carrier 11 is adjusted to an angle meeting design requirements, and the accuracy is high.

108. The second mirror group 13 is adjusted according to the relative inclination angle between the second mirror group 13 and the second carrier 11, so that the optical axis of the second mirror group 13 coincides with the hole axis of the second light passing hole 11b, and a second gap 1c is formed between the second mirror group 13 and the third groove 11 a.

It can be known that the hole axis of the first light passing hole 10c and the hole axis of the second light passing hole 11b are both coincident with the optical axis 1a of the optical lens 1. By performing step 108, the optical axis of the second mirror group 13 coincides with the hole axis of the second light passing hole 11b, so that the optical axis of the second mirror group 13 coincides with the optical axis 1a of the optical lens 1. That is, after the step 108 is performed, the optical axis of the first lens group 12 coincides with the optical axis 1a of the optical lens 1, and the optical axis of the second lens group 13 coincides with the optical axis 1a of the optical lens 1, that is, the optical axes of the first lens group 12 and the second lens group 13 coincide with each other, and the coincidence precision is high, so that the accuracy of the SFR (Spatial Frequency Response algorithm) result of the optical lens 1 can be improved, and the assembly yield of the optical lens 1 is high.

The second gap 1c can provide a space for an adhesive medium, so that the adhesive medium can adhere the second mirror group 13 in the third groove 11a, thereby assembling the first mirror group 12 and the first carrier 10.

109. An adhesive medium is added to the first gap 1b and the second gap 1c, respectively.

In the present embodiment, as shown in fig. 4 and 5, the first carrier 10 is provided with a first dispensing opening 10d communicated to the middle position of the first gap 1b, and the second carrier 11 is provided with a second dispensing opening 11c communicated to the middle position of the second gap 1c. The middle position of the first gap 1b is the intersection position of the middle of the first gap 1b along the optical axis direction of the first mirror group 12 and the middle along the radial direction of the first mirror group. For example, when the first gap 1b is a rectangle on a plane, the optical axis direction is the longitudinal direction of the rectangle, and the radial direction is the width direction of the rectangle, the middle position of the rectangle is the center position of the rectangle. Similarly, the middle position of the second gap 1c is the same as the middle position of the first gap 1b, and is not described again.

The first dispensing opening 10d divides the first position-limiting portion 11e into two parts, and the second dispensing opening 11c divides the second position-limiting portion 11d into two parts.

Then the step 109 may specifically be:

an adhesive medium is added to the first dispensing opening 10d and the second dispensing opening 11c, respectively, so that the adhesive medium is distributed at the middle position of the first gap 1b and the middle position of the second gap 1c.

It can be understood that, by implementing step 109, the adhesive medium can be distributed at the middle position of the first gap 1b and the middle position of the second gap 1c, taking the first gap 1b as an example, when the adhesive medium deforms (contracts or expands), the acting force applied to each position of the first mirror group 12 by the deformation of the adhesive medium located at the middle position of the first gap 1b can be cancelled out, so as to avoid the occurrence of a situation that the deformation of the adhesive medium located at the middle position of the first gap 1b causes the change of the position of the first mirror group 12 relative to the first groove 10a along the direction of contraction or expansion of the adhesive medium, thereby ensuring accurate SFR result of the optical lens 1 and high assembly yield of the optical lens 1. Similarly, the bonding medium is added to the second dispensing opening 11c, so that the bonding medium is distributed in the middle of the second gap 1c, the situation that the position of the second lens group 13 is changed relative to the third groove 11a due to deformation of the bonding medium can be avoided, the accurate SFR result of the optical lens 1 is ensured, and the assembly yield of the optical lens 1 is high.

Optionally, the viscosity of the bonding medium is eta, 20000cps ≦ eta ≦ 80000cps. It is understood that, taking the first dispensing opening 10d as an example for explanation, the second dispensing opening 11c is similar in that if the viscosity η of the adhesive medium is less than 20000cps, the fluidity of the adhesive medium is large, most of the adhesive medium remains in the first dispensing opening 10d before the adhesive medium is cured, and only a small portion of the adhesive medium adheres to the first gap 1b, which affects the adhesive strength between the first mirror group 12 and the first recess 10a (the first carrier 10). If the viscosity η of the adhesive medium is greater than 80000cps, the optical lens 1 needs to use a glue needle with a larger tube diameter during assembly, especially when the adhesive medium is added to the first glue applying opening 10d through the glue needle, and the optical lens 1 cannot be matched due to a smaller size. Therefore, the viscosity η of the adhesive medium may be 20000cps η 80000cps, the adhesive strength between the first mirror group 12 and the first groove 10a is high, the adhesive strength between the second mirror group 13 and the third groove 11a is high, and the adhesive process is facilitated, and the viscosity η of the adhesive medium 12 may be 20000cps, 30000cps, 40000cps, 50000cps, 60000cps, 70000cps, 80000cps, or the like.

The bonding medium may be UV (Ultraviolet) heat curing glue, light curing glue, water vapor curing glue, or the like, and different types of bonding media may be selected according to actual conditions to meet different use requirements.

Illustratively, the outer diameter d of the rubber needle used for implementing step 109 can be 0.1mm ≦ d ≦ 0.2mm. It will be appreciated that by using a glue pin with an outer diameter, it is possible to adapt the adhesive medium of different viscosity, thereby ensuring that the adhesive medium can be added to the first dispensing opening 10d and the second dispensing opening 11c.

110. The bonding media located in the first gap 1b and the second gap 1c are cured, respectively.

It can be understood that, by performing step 110, after the adhesive medium located at the middle position of the first gap 1b and the middle position of the second gap 1c is cured, the adhesive force of the adhesive medium is relatively large, and the adhesive strength between the first mirror group 12 and the first groove 10a and the adhesive strength between the second mirror group 13 and the third groove 11a can be improved.

For example, the curing in step 110 may include one or more of UV curing, thermal curing, and moisture curing, and the corresponding curing method may be used according to the kind of the adhesive medium.

The first embodiment provides an assembling method of an optical lens 1, which can make the optical axis of the first lens group 12 of the optical lens 1 coincide with the optical axis of the second lens group 13, so as to improve the accuracy of the image resolution algorithm of the optical lens 1, and the assembling yield of the optical lens 1 is high.

Example two

Another method for assembling an optical lens 1 according to an embodiment of the present invention, where the structure of the optical lens 1 is the same as that of the optical lens 1 according to the first embodiment with reference to fig. 2 and 3, includes the following steps:

first, a first feature circle 12a of the surface of the first mirror group 12 facing the object side is recognized by the position recognition camera, and a center coordinate position of the first feature circle 12a is calculated.

It is understood that the first characteristic circle 12a is a part or all of a predetermined circular contour of the surface of the first mirror group 12 facing the object side, and the center of the circular contour coincides with the optical axis of the first mirror group 12. The first feature circle 12a on the surface of the first mirror group 12 facing the object side is not shielded by other positions of the first mirror group 12 itself, so that the position recognition camera can recognize the first feature circle 12a conveniently, and in the subsequent step, the position recognition camera can recognize the first feature circle 12a all the time in the process of moving the first mirror group 12, so as to know the position of the first mirror group 12 in real time, thereby improving the accuracy of moving the first mirror group 12, and being beneficial to improving the assembly accuracy of the first mirror group 12 and the first groove 10 a.

For example, in order to enable the position recognition camera to clearly recognize the first feature circle 12a, the surface roughness of the object-side-facing surface of the first mirror group 12 may be VDI ≦ 12.

And secondly, identifying the first light through hole 10c by using a position identification camera and calculating the circle center coordinate position of the first light through hole 10 c.

It is understood that the second step and the first step do not affect each other, and therefore, the order of implementing the first step and the second step may be reversed or performed simultaneously, which is not particularly limited in this embodiment. And when the mode that two steps are carried out simultaneously is adopted, the efficiency of the assembling method can be improved.

And thirdly, moving the first mirror group 12 into the first groove 10a according to the center coordinate position of the first characteristic circle 12a and the center coordinate position of the first light through hole 10c, and enabling the center of the first mirror group 12 and the center of the first light through hole 10c to coincide on the optical axis 1a of the optical lens 1.

It can be understood that, since the center of the first characteristic circle 12a is located on the optical axis of the first mirror group 12, that is, the center of the first characteristic circle 12a is used to represent the center of the first mirror group 12, the coordinate position of the center of the first mirror group 12 can be directly obtained after the first step is performed, and is the same as the center coordinate position of the first characteristic circle 12a, and coordinate compensation is not required, and after the second step is performed, the center coordinate position of the first light transmitting hole 10c is known, so that the center coordinate position of the center of the first characteristic circle 12a can directly represent the center position of the first mirror group 12 in the process of moving the first mirror group 12 to make the center of the first mirror group 12 and the center of the first light transmitting hole 10c coincide on the optical axis 1a of the optical lens 1, thereby reducing the difficulty of performing the third step, and improving the precision of movement without coordinate compensation.

The coordinate compensation means that when the coordinate position of another point of the first mirror group 12 (not on the optical axis of the first mirror group 12) is used to represent the coordinate position of the center of the first mirror group 12, the coordinate of the point needs to be shifted in the direction perpendicular to the optical axis of the first mirror group 12, so that the coordinate position of the center of the first mirror group 12 can be represented. In the coordinate compensation process, a certain compensation error exists, which causes a deviation between the compensated coordinate and the actual coordinate position of the center of the first mirror group 12, and affects the accuracy of moving the first mirror group 12, so that the accuracy of the coincidence between the center of the first mirror group 12 and the center of the first light-transmitting hole 10c on the optical axis 1a of the optical lens 1 is not high after the third step is performed.

Fourthly, recognizing a second characteristic circle 13a on the surface of the second lens group 13 facing the image side by using the position recognition camera and calculating the center coordinate position of the second characteristic circle 13 a. A second characteristic circle 13a can be seen in fig. 6.

It is understood that the second characteristic circle 13a is a part or all of a preset circular contour of the surface of the second lens group 13 facing the image side, and the center of the circular contour coincides with the optical axis of the second lens group 13. The second characteristic circle 13a on the surface of the second mirror group 13 facing the image side is not shielded by other positions of the second mirror group 13 itself, so that the position recognition camera can recognize the second characteristic circle 13a conveniently, and in the subsequent steps, the position recognition camera can recognize the second characteristic circle 13a all the time in the process of moving the second mirror group 13 to know the position of the second mirror group 13 in real time, so that the precision of moving the second mirror group 13 is improved, and the assembly precision of the second mirror group 13 and the third groove 11a is improved.

For example, in order to enable the position recognition camera to clearly recognize the second feature circle 13a, the surface roughness of the image-side-facing surface of the second mirror group 13 may be VDI ≦ 12.

And fifthly, recognizing the second light through hole 11b by using the position recognition camera and calculating the circle center coordinate position of the second light through hole 11 b.

Sixthly, moving the second mirror group 13 into the third groove 11a according to the center coordinate position of the second characteristic circle 13a and the center coordinate position of the second light passing hole 11b, and enabling the center of the second mirror group 13 and the center of the second light passing hole 11b to coincide on the optical axis 1a of the optical lens 1.

It is to be understood that the operating principle of the sixth step may refer to the third step. The main differences are the replacement of the first mirror group 12 and the second mirror group 13 and the replacement of the first carrier 10 and the second carrier 11, and therefore are not described again.

And the third step is implemented after the first step and the second step are completed, the sixth step is implemented after the fourth step and the fifth step are completed, the third step and the fourth step are not affected, and the implementation sequence can be reversed or implemented simultaneously. When a mode that a plurality of steps are simultaneously carried out is adopted, the efficiency of the assembling method can be improved.

Seventh, a first inclination angle between the surface of the first mirror group 12 facing the object side and the end surface of the first carrier 10 facing the object side is obtained by using the collimator.

The surface of the first mirror group 12 facing the object side includes an irregular portion and a planar portion, and the first mirror group 12 is adjusted by using the planar portion as a reference surface. Before the assembly method is performed, it can be seen that the first carrier 10 and the second carrier 11 are assembled, and an end surface of the first carrier 10 facing the object side is used as a reference surface for adjusting the first mirror group 12.

It can be understood that, a surface of the first mirror group 12 facing the object side is perpendicular to an optical axis of the first mirror group 12, and an end surface of the first carrier 10 facing the object side is perpendicular to a hole axis of the first light passing hole 10c of the first carrier 10, so that the first inclination angle is equal to an included angle between the optical axis of the first mirror group 12 and the hole axis of the first light passing hole 10 c. When the first inclination angle is not zero, it indicates that the optical axis of the first mirror group 12 and the hole axis of the first light passing hole 10c are not overlapped, that is, the collimator obtains the first inclination angle, and an included angle between the optical axis of the first mirror group 12 and the hole axis of the first light passing hole 10c can be obtained. In other words, after the first tilt angle is obtained by the collimator, the variation of the first mirror group 12 that needs to be adjusted can be obtained according to the angle of the first tilt angle, and finally the optical axis of the first mirror group coincides with the hole axis of the first light passing hole 10c, so that the operation accuracy is high.

Moreover, the first inclination angle can directly represent the included angle between the optical axis of the first mirror group 12 and the hole axis of the first light passing hole 10c, and when the posture of the first mirror group 12 is adjusted, the data of the first inclination angle can be directly referred to, and the calibration can be completed without conversion, so that the error can be reduced.

Eighthly, the first mirror group 12 is adjusted according to the first inclination angle, so that the optical axis of the first mirror group 12 coincides with the hole axis of the first light passing hole 10c, and a first gap 1b is formed between the first mirror group 12 and the first groove 10 a.

And ninthly, acquiring a second inclination angle between the surface of the second lens group 13 facing the image side and the end surface of the second carrier 11 facing the image side by using the collimator.

It is understood that the surface of the second lens group 13 facing the image side is perpendicular to the optical axis of the second lens group 13, the end surface of the second carrier 11 facing the image side is perpendicular to the hole axis of the second light passing hole 11b of the second carrier 11, and the second inclination angle is equal to the included angle between the optical axis of the second lens group 13 and the hole axis of the second light passing hole 11 b. When the second inclination angle is not zero, it indicates that the optical axis of the second mirror group 13 and the hole axis of the second light passing hole 11b are not overlapped, that is, the collimator obtains the second inclination angle, and an included angle between the optical axis of the second mirror group 13 and the hole axis of the second light passing hole 11b can be obtained. In other words, after the second inclination angle is obtained by the collimator, the angle required by the second mirror group 13 to adjust the optical axis thereof to coincide with the hole axis of the second light passing hole 11b can be obtained according to the angle of the second inclination angle, and the accuracy is high.

Tenth, the second mirror group 13 is adjusted according to the second inclination angle, so that the optical axis of the second mirror group 13 coincides with the hole axis of the second light passing hole 11b, and a second gap 1c is formed between the second mirror group 13 and the third groove 11 a.

It can be understood that, by adjusting the first mirror group 12 according to the first inclination angle, the accuracy of the coincidence between the optical axis of the first mirror group 12 and the hole axis of the first light passing hole 10c can be improved, and by adjusting the second mirror group 13 according to the second inclination angle, the accuracy of the image resolution algorithm of the optical lens 1 can be improved, and the assembly yield of the optical lens 1 is high, by increasing the accuracy of the coincidence between the optical axis of the first mirror group 12 and the hole axis of the second light passing hole 11b, and by coaxially arranging the first light passing hole 10c and the second light passing hole 11b, that is, by increasing the accuracy of the coincidence between the optical axis of the first mirror group 12 and the optical axis of the second mirror group 13.

In the tenth step, an adhesive medium is added to the first gap 1b and the second gap 1c, respectively.

In the twelfth step, the bonding media located in the first gap 1b and the second gap 1c are cured, respectively.

In the second embodiment, another method for assembling the optical lens 1 is provided, and the coincidence precision of the optical axis of the first lens group 12 and the optical axis of the second lens group 13 is high, so that the accuracy of the image resolution algorithm of the optical lens 1 can be improved, and the assembly yield of the optical lens 1 is high.

EXAMPLE III

In another method for assembling an optical lens 1 according to the first embodiment of the present invention, referring to fig. 2 and 3, the optical lens 1 has a structure similar to that of the optical lens 1 according to the first embodiment, and the method includes the following steps:

in the first step, the second carrier 11 is moved such that the surface of the second carrier 11 facing the first light passing hole 10c abuts against the bottom surface of the first groove 10 a.

Optionally, the optical lens 1 further comprises a driving component (not shown) for driving the second carrier to move relative to the first carrier. It will be appreciated that in the implementation of the assembly method, the first step can be implemented using the components (driving parts) of the optical lens 1 itself, and that, depending on the circumstances, no additional structure is required to implement the first step.

It can be understood that, by implementing the first step, the surface of the second carrier 11 facing the first light passing hole 10c is abutted against the bottom surface of the first groove 10a, and the two surfaces are abutted against each other to provide friction force when there is a relative movement trend, so as to avoid the relative movement between the second carrier 11 and the first carrier 10. Particularly, when an adhesive medium is added to bond the first mirror group 12 and the second mirror group 13 with the first carrier 10 and the second carrier 11, respectively, it can be avoided that the relative movement of the first carrier 10 and the second carrier 11 caused by the squeezing force of the adhesive medium causes the relative position of the first mirror group 12 and the first carrier 10 and the relative position of the second mirror group 13 and the second carrier 11 to change, which causes the inaccuracy of the SFR result of the optical lens 1 and the influence on the assembly yield of the camera.

Optionally, the surface roughness of the second carrier 11 facing the first light passing hole 10c is VDI ≧ 24, and the roughness of the bottom surface of the first groove 10a is VDI ≧ 24. It can be understood that, the roughness of the surface of the second carrier 11 facing the first light passing hole 10c and the bottom surface of the first groove 10a adopts the above range, which can improve the friction force between the two surfaces, effectively avoid the relative movement between the second carrier 11 and the first carrier 10, improve the accuracy of the SFR result of the optical lens 1 and affect the assembly yield of the optical lens 1.

In a second step, the positions of the first mirror group 12 and the first carrier 10 are acquired with a position recognition camera.

Third, the first mirror group 12 is moved into the first groove 10a according to the position of the first mirror group 12 and the position of the first carrier 10, and the center of the first mirror group 12 and the center of the first light passing hole 10c are made to coincide on the optical axis 1a of the optical lens 1.

The fourth step acquires the positions of the second mirror group 13 and the second carrier 11 using the position recognition camera.

And a fifth step of moving the second mirror group 13 into the third groove 11a according to the position of the second mirror group 13 and the position of the second carrier 11, and making the center of the second mirror group 13 and the center of the second light passing hole 11b coincide on the optical axis 1a of the optical lens 1.

Sixthly, the relative inclination angles of the first mirror group 12 and the first carrier 10 are obtained by using the collimator.

Seventhly, the first mirror group 12 is adjusted according to the relative inclination angle between the first mirror group 12 and the second carrier 11, so that the optical axis of the first mirror group 12 coincides with the hole axis of the first light passing hole 10c, and a first gap 1b is formed between the first mirror group 12 and the first groove 10 a.

And eighthly, acquiring the relative inclination angle of the second mirror group 13 and the second carrier 11 by using the collimator.

And ninthly, adjusting the second mirror group 13 according to the relative inclination angle between the second mirror group 13 and the second carrier 11, so that the optical axis of the second mirror group 13 coincides with the hole axis of the second light through hole 11b, and a second gap 1c is formed between the second mirror group 13 and the third groove 11 a.

Tenth, an adhesive medium is added to the first gap 1b and the second gap 1c, respectively.

In the tenth step, the bonding media located in the first gap 1b and the second gap 1c are cured, respectively.

In the third embodiment, an assembling method of the optical lens 1 is provided, which can make the optical axis of the first lens group 12 and the optical axis of the second lens group 13 of the optical lens 1 coincide, so as to improve the accuracy of the image resolution algorithm of the optical lens 1, and the assembling yield of the optical lens 1 is high.

Example four

Referring to fig. 2, a schematic structural diagram of an optical lens 1 according to a fourth embodiment of the present invention is shown, where the optical lens 1 is assembled by using the assembly method according to any one of the first to third embodiments.

The fourth embodiment of the invention provides the optical lens 1, the accuracy of the image analysis force algorithm of the optical lens 1 is high, and the assembly yield of the optical lens 1 is high.

EXAMPLE five

Referring to fig. 7, which is a schematic diagram of a structure of a camera module 500 according to a fifth embodiment of the present invention, the camera module 500 includes a photosensitive element 50 and the optical lens 1 according to the fourth embodiment, and the photosensitive element 50 is disposed on an image side of the optical lens 1.

The photosensitive assembly 50 includes a substrate 501 and a photosensitive element 502, the photosensitive element 502 is disposed on the substrate 501, and an optical axis 1a of the optical lens 1 coincides with an optical axis of the photosensitive element 50. Wherein the optical axis 1a of the optical lens and the optical axis of the photosensitive element are shown by a dotted line 1a in fig. 7. It is understood that the photosensitive component 50 is used to receive the light signal to convert into an image, and the above description of the photosensitive component 50 is intended to illustrate a possible solution, but not to specifically limit the photosensitive component 50 of the present embodiment, and in some other embodiments, the photosensitive component 50 may have other structural solutions.

Alternatively, the substrate 501 may be any one of a hard circuit board, a rigid-flex board, or a flexible circuit board. It is understood that different types of the substrate 501 may be selected according to actual situations to meet different usage requirements, and this embodiment is not particularly limited thereto.

The photosensitive element 502 may be a CCD (Charge-coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) Device, for example. Different types of the photosensitive elements 502 can be selected according to actual situations to meet different use requirements, which is not specifically limited in this embodiment.

That is, the photosensitive assembly 50 can be matched with different substrates 501 and photosensitive elements 502 according to actual needs, so as to meet different requirements.

The fifth embodiment of the present invention provides a camera module 500, which has higher accuracy of image resolution algorithm and higher assembly yield.

EXAMPLE six

Referring to fig. 8, a schematic diagram of a structure of an electronic apparatus 600 according to a sixth embodiment of the present invention is provided, where the electronic apparatus 600 includes an apparatus main body 60 and a camera module 500 according to a fifth embodiment, and the camera module 500 is disposed on the apparatus main body 60.

The electronic device 600 of the present embodiment may be a mobile phone, a tablet computer, a camera, a monitoring probe, or the like. The camera module 500 may be fixed or movably disposed on the device body 60, and when the electronic device 600 is a mobile phone or a tablet, the camera module 500 may be a front camera module or a rear camera module of the mobile phone or the tablet.

The sixth embodiment of the present invention provides an electronic device 600, wherein the accuracy of the image analysis algorithm of the camera module 500 and the assembly yield are high.

The above detailed description is made on the assembling method of the optical lens, the camera and the electronic device disclosed in the embodiment of the present invention, and the principle and the implementation of the present invention are explained by applying an example, and the description of the above embodiment is only used to help understanding the assembling method of the optical lens, the camera and the electronic device and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. An assembling method of an optical lens, wherein the optical lens comprises a first carrier, a second carrier, a first lens group and a second lens group, the first carrier is provided with a first groove, a second groove and a first light through hole communicating the first groove and the second groove, the second carrier is movably arranged in the second groove, the second carrier is provided with a third groove and a second light through hole communicating the third groove and the first light through hole, and the second light through hole is coaxially arranged with the first light through hole, the method comprises:

acquiring positions of the first mirror group and the first carrier with a position recognition camera;

adding bonding media to the first gap and the second gap, respectively;

2. The assembly method according to claim 1, wherein the acquiring the positions of the first mirror group and the first carrier with a position recognition camera comprises:

3. The assembly method of claim 1, wherein said acquiring the positions of the second mirror group and the second carrier with a position-recognition camera comprises:

recognizing a second characteristic circle on the surface of the second lens group facing the image side by using a position recognition camera and calculating the coordinate position of the center of the second characteristic circle;

and recognizing the second light through hole by using a position recognition camera and calculating the circle center coordinate position of the second light through hole.

4. The assembly method of claim 1, wherein said obtaining a relative tilt angle of the first mirror group and the first carrier with a collimator comprises:

5. The assembly method of claim 1, wherein the obtaining the relative tilt angles of the second mirror group and the second carrier using the collimator comprises:

6. The assembly method according to any one of claims 1 to 5, characterized in that, before the acquiring the positions of the first mirror group and the first carrier with the position recognition camera, the method further comprises:

7. The method of assembling of claim 6, wherein the optical lens further comprises a drive component for driving the second carrier to move relative to the first carrier.

8. The assembling method according to any one of claims 1 to 5, wherein the first carrier is provided with a first dispensing port communicated to a middle position of the first gap, and the second carrier is provided with a second dispensing port communicated to a middle position of the second gap;

9. An optical lens assembled by the assembly method according to any one of claims 1 to 8.

10. A camera module comprising the optical lens of claim 9 and a photosensitive element, wherein the photosensitive element is disposed on an image side of the optical lens.

11. An electronic apparatus comprising an apparatus main body and the camera module according to claim 10, the camera module being provided to the apparatus main body.