CN111025513A - Integrated lens barrel, optical lens, camera module and assembling method - Google Patents

Abstract

The present invention provides an integrated lens barrel, including: a cylindrical body having an inner side surface and a medial axis; and the inner extension part extends from the inner side surface to the central axis, the center of the inner extension part is provided with a light through hole, the inner side surface is divided into a first section and a second section by the inner extension part, the top surface of the inner extension part and the first section form a first groove suitable for accommodating a first lens group, and the bottom surface of the inner extension part and the second section form a second groove suitable for accommodating a second lens group. The invention also provides a corresponding optical lens, a camera module and an assembling method of the optical lens and the camera module. The invention can reduce the deformation of the optical lens based on the active calibration process, thereby improving the imaging quality and the yield.

Description

Integrated lens barrel, optical lens, camera module and assembling method

Technical Field

The invention relates to the technical field of optical imaging, in particular to an integrated lens barrel, an optical lens, a camera module and an assembling method.

Background

Along with the development of terminals such as mobile phones and computers, users have a great deal of improvement on various requirements, and particularly along with the development of mobile phones, the pursuit of users on shooting quality enables manufacturers to develop personalized and customized camera modules, such as large apertures and wide angles, lenses for solving the problem of a large number of lenses caused by aberration, and the like. This is on the one hand an increasing complexity in optical design and on the other hand the reality is that the complex optical system is sensitive, which poses a challenge to the yield of the manufacture and the quality of the product. Because the optical system of a large-aperture and large-wide-angle camera module is sensitive, and the reliability of the manufacturing process and the verification process of the camera module is weaker than that of the conventional design, a lens with a better structure is needed.

On the other hand, in order to meet the more and more extensive market demands, a high-pixel, small-size, large aperture is an irreversible development trend of the existing camera module. However, the need to achieve high pixel, small size, large aperture in the same imaging mold is very difficult. For example, the compact development of mobile phones and the increase of the mobile phone screen occupation ratio make the space inside the mobile phone available for the front camera module smaller and smaller, and the market puts forward higher and higher demands on the imaging quality of the camera module.

In the field of compact camera modules (e.g., camera modules for mobile phones), the quality of the optical imaging lens and the manufacturing errors during the module packaging process often need to be considered. Specifically, in the manufacturing process of the optical imaging lens, factors affecting the lens resolving power come from errors in the respective elements and their assembly, errors in the thickness of the lens spacer elements, errors in the assembly fitting of the respective lenses, variations in the refractive index of the lens material, and the like. Because the factors influencing the resolution of the lens are very many and exist in a plurality of elements, the control of each factor has the limit of the manufacturing precision, if the precision of each element is simply improved, the improvement capability is limited, the improvement cost is high, and the increasingly improved imaging quality requirement of the market can not be met.

The applicant provides an assembling method for adjusting and determining the relative positions of an upper sub-lens and a lower sub-lens based on an active calibration process, and then bonding the upper sub-lens and the lower sub-lens together according to the determined relative positions so as to manufacture a complete optical lens or a camera module. The solution can improve the process capability index (CPK) of the optical lens or the camera module which is produced in large scale; the requirements on the precision and the assembly precision of each element of a material (such as a sub-lens or a photosensitive assembly for assembling an optical lens or a camera module) can be relaxed, so that the overall cost of the optical imaging lens and the camera module is reduced; can adjust the various aberrations of the module of making a video recording in real time at the equipment in-process, reduce the defective rate, reduction in production cost promotes the formation of image quality.

However, active calibration of the optical system of the lens is a new production process, and the actual mass production needs to consider many factors such as reliability, falling resistance, weather resistance and manufacturing cost of the optical lens and the camera module, and sometimes needs to face various non-measurable factors to cause yield reduction. The applicant believes that improving the structural reliability of optical lenses manufactured based on an active alignment process is an important direction for improving the imaging quality and yield of such optical lenses. Therefore, a solution capable of improving the structural reliability of an optical lens manufactured based on an active alignment process is urgently required.

Disclosure of Invention

The present invention aims to provide a solution that overcomes at least one of the drawbacks of the prior art.

According to an aspect of the present invention, there is provided an integrated lens barrel including: a cylindrical body having an inner side surface and a medial axis; the inner extension part extends towards the central axis from the inner side surface, a light through hole is formed in the center of the inner extension part, the inner side surface is divided into a first section and a second section, a first groove suitable for containing a first lens group is formed by the top surface of the inner extension part and the first section, and a second groove suitable for containing a second lens group is formed by the bottom surface of the inner extension part and the second section.

Wherein the first segment is in the shape of a closed loop in a top view.

Wherein the first section has a concave section that is recessed from an inner side of the cylindrical body in a direction toward an outer side of the cylindrical body.

Wherein the first segment is in a ring shape with a notch in a top view.

Wherein, the top surface of the inner extension is suitable for arranging a rubber material.

Wherein the second section has a plurality of steps adapted to sequentially embed a plurality of second lenses to assemble the second lens group; the bottom surface of the inner extension part is suitable for bearing the second lens group, and the top surface of the inner extension part is suitable for arranging a rubber material to bond the first lens group.

According to another aspect of the present invention, there is also provided an optical lens including: an integrated lens barrel including a cylindrical body having an inner side surface and a central axis; the inner extension part is extended inwards from the inner side surface, a light through hole is formed in the center of the inner extension part, the inner side surface is divided into a first section and a second section by the inner extension part, a first groove is formed by the top surface of the inner extension part and the first section, and a second groove is formed by the bottom surface of the inner extension part and the second section; a first lens group including a single first lens or a plurality of first lenses grouped together by fitting or adhesion between the lenses; a second lens group which comprises at least one second lens, wherein the second lens group is supported against the bottom surface of the inner extension part and is arranged in the second groove, and the first lens group and the second lens group jointly form an imaging optical system; and the first rubber material is positioned between the first lens group and the first groove.

The first rubber material is suitable for supporting and fixing the first lens group and the integrated lens cone after curing, so that the relative positions of the first lens group and the second lens group are kept at the relative positions determined by active calibration based on the imaging result of the optical system.

Wherein the first segment is in the shape of a closed loop in a top view.

Wherein the first section has a concave section that is recessed from an inner side of the cylindrical body in a direction toward an outer side of the cylindrical body.

Wherein a light shielding plate is bonded on the top surface of the cylindrical main body, the light shielding plate forms a diaphragm, and no glue material is filled between the light shielding plate and the first lens group.

The first lens group comprises an optical area and a structural area surrounding the optical area, wherein the top surface of the structural area is bonded with a light shielding plate, the light shielding plate forms a diaphragm, and no glue material is filled between the light shielding plate and the top surface of the cylindrical main body.

Wherein the first segment is in a ring shape with a notch in a top view.

Wherein a light shielding plate is bonded on the top surface of the cylindrical main body to form a diaphragm, the light shielding plate is provided with a side baffle matched with the notch, and no glue material is filled between the light shielding plate and the first lens group.

Wherein the first lens group comprises an optical area and a structural area surrounding the optical area, the top surface of the structural area is bonded with a light shielding plate to form a diaphragm, the light shielding plate is provided with a side baffle matched with the notch, and no glue material is filled between the light shielding plate and the top surface of the cylindrical main body.

The shading plate is adhered to the base, wherein the shading plate is made of metal or is suitable for being used as an appearance surface.

The light screen and the integrated lens cone are made of the same material, and the glue material for adhering the light screen is made of the same material as the first glue material.

The first lens group comprises an optical area and a structural area surrounding the optical area, a shading layer is attached to the outer surface of the structural area, and the top surface of the structural area is higher than that of the integrated lens barrel.

The light shielding layer shields visible light and transmits non-visible light with a specific waveband, and the non-visible light with the specific waveband is light for triggering the curing reaction of the first glue material.

Wherein the second section has a plurality of steps adapted to sequentially embed a plurality of second lenses to assemble the second lens group.

Wherein the cylindrical body and the inner extension are integrally formed.

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

According to another aspect of the present invention, there is also provided an optical lens assembling method including: preparing an integrated lens barrel including a cylindrical body having an inner side surface and a central axis; the inner extension part is extended inwards from the inner side surface, a light through hole is formed in the center of the inner extension part, the inner side surface is divided into a first section and a second section by the inner extension part, a first groove is formed by the top surface of the inner extension part and the first section, and a second groove is formed by the bottom surface of the inner extension part and the second section; mounting a second lens group on the integrated lens barrel to form a second lens component, wherein the second lens group comprises at least one second lens, and the second lens group is supported against the bottom surface of the inner extension part and is arranged in the second groove; preparing a first lens group, wherein the first lens group comprises a single first lens or a plurality of first lenses grouped together by virtue of the interaction of the lenses themselves; placing the first lens group in the first groove, and then pre-positioning the first lens group and the second lens component to enable the first lens group and the second lens group to form an imageable optical system; actively calibrating the relative positions of the first lens group and the second lens group based on the measured imaging result; and bonding the first lens group and the first groove through a first adhesive material, and keeping the first lens group and the second lens group at the relative positions determined by active calibration, thereby obtaining the optical lens.

Wherein the first segment is in the shape of a closed loop in a top view; in the pre-positioning step and the active calibration step, a clamp is used for clamping the first lens group to move, wherein a gap for accommodating the clamp is formed between the first segment and the side surface of the first lens group.

Wherein the first segment is in a ring shape with a notch in a top view; in the pre-positioning step and the active calibration step, a clamp is used for clamping the first lens group to move, wherein the clamp extends into the integrated lens barrel through the notch and clamps the first lens group.

Wherein the second section has a plurality of steps; in the step of mounting the second lens group to the integrated lens barrel, the at least one second lens is sequentially embedded into the multistage steps to assemble the second lens group and form the second lens component.

In the step of bonding the first lens group and the first groove through the first adhesive material, the first adhesive material is only arranged between the bottom surface of the first lens group and the top surface of the inner extension part; or the first rubber material is arranged between the bottom surface of the first lens group and the top surface of the inner extension part, and is also arranged between the side surface of the first lens group and the first segment.

Wherein the first lens group comprises an optical zone and a structural zone surrounding the optical zone; the assembly method further comprises: and a shading plate is adhered to the top surface of the structure area, and no glue material is filled between the shading plate and the top surface of the cylindrical main body.

Wherein the assembly method further comprises: and adhering a light shielding plate on the top surface of the cylindrical main body, and not filling glue between the light shielding plate and the top surface of the first lens group.

And adhering the light shielding plate to the first lens group and the first groove through a first adhesive material after the step of adhering the first lens group and the first groove through the first adhesive material is completed.

The step of bonding the first lens group and the first groove through the first adhesive material comprises the steps of adhesive distribution, exposure and baking which are sequentially executed; the step of adhering the light shielding plate is performed after the exposing step and before the baking step.

According to another aspect of the present invention, there is also provided a camera module assembling method, including: assembling the optical lens by any one of the optical lens assembling methods; and assembling a camera module based on the optical lens.

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

1. the invention can reduce the deformation of the optical lens based on the active calibration process, thereby improving the imaging quality and the yield.

2. The invention can adopt the integrated lens barrel to replace a split type lens barrel, provides high mechanical reliability of the optical lens based on active calibration, and can inhibit optical performance variation caused under the conditions of baking, high temperature and high humidity and the like.

3. According to the invention, the light shielding layer which does not transmit visible light and can project non-visible light in a specific wave band is attached to the first lens group, so that the exposure can be transmitted from the right upper side when the glue material is cured, and compared with the side exposure, the exposure mode is more uniform, and the imaging quality of the optical lens is improved.

4. The invention can adopt the shading plate made of metal materials, thereby reducing the height of the optical lens or the camera module.

5. The invention can use the shading plate as an appearance surface, thereby reducing the height of the optical lens or the camera module and reducing the assembly process.

Drawings

Exemplary embodiments are illustrated in referenced figures of the drawings. The embodiments and figures disclosed herein are to be regarded as illustrative rather than restrictive.

FIG. 1 shows a schematic cross-sectional view of an optical lens 1000 of one embodiment of the invention;

fig. 2 shows a schematic cross-sectional view of an optical lens 1000 in another embodiment of the invention;

fig. 3 shows an optical lens based on active alignment using a split type barrel in one comparative example;

fig. 4 shows a schematic top view of an integrated lens barrel 300 according to an embodiment of the present invention;

fig. 5 illustrates a cross-sectional schematic view of the integrated lens barrel 300 illustrated in fig. 4;

fig. 6 shows a schematic top view of an integrated lens barrel 300 according to another embodiment of the present invention;

fig. 7 illustrates a cross-sectional schematic view of the integrated lens barrel 300 illustrated in fig. 6;

fig. 8 illustrates a schematic view of an optical lens employing the unitary lens barrel 300 illustrated in fig. 6 according to an embodiment of the present invention;

FIG. 9 shows an optical lens of a variant embodiment of the invention;

fig. 10 shows an optical lens of another modified embodiment of the present invention;

fig. 11 shows a schematic top view of an integrated lens barrel 300 of a modified embodiment of the present invention;

fig. 12 shows an optical lens of another modified embodiment of the present invention;

fig. 13 shows an optical lens of another modified embodiment of the present invention;

FIG. 14A illustrates a relative position adjustment in active calibration in one embodiment of the invention;

FIG. 14B illustrates rotational adjustment in active calibration of another embodiment of the present invention;

FIG. 14C illustrates a relative position adjustment with added v, w direction adjustments in an active calibration of yet another embodiment of the present invention.

Detailed Description

For a better understanding of 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 the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

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

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

It will be further understood that the terms "comprises," "comprising," "includes," "including," "has," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

As used herein, the terms "substantially," "about," and the like are used as terms of table approximation and not as terms of table degree, and are intended to account for inherent deviations in measured or calculated values that will be recognized by those of ordinary skill in the art.

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 will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 1 shows a schematic cross-sectional view of an optical lens 1000 according to an embodiment of the invention. As shown in fig. 1, the optical lens 1000 of the present embodiment includes an integrated lens barrel 300, a first lens group 100, a second lens group 200, and a first adhesive material 400. The integrated lens barrel 300 includes a cylindrical body 301 and an inner extension portion 302 formed to extend from an inner surface of the cylindrical body 301. The cylindrical body 301 is integrally formed with the inner extension 302. Further, referring to fig. 1, the cylindrical body 301 has an inner side surface and a medial axis. The inner extension portion 302 extends from the inner side surface to the central axis and has a light through hole 302a in the center, the inner extension portion 302 divides the inner side surface into a first section 3011 and a second section 3012, wherein a top surface of the inner extension portion 302 and the first section 3011 form a first groove, and a bottom surface of the inner extension portion 302 and the second section 3012 form a second groove. In this embodiment, the first lens group 100 is composed of a single first lens. It should be noted that the present invention is not limited thereto, and for example, fig. 2 shows a schematic cross-sectional view of an optical lens 1000 in another embodiment of the present invention. In this embodiment, the first lens group 100 may be composed of a plurality of first lenses (for example, a plurality of first lenses that are fitted or bonded to each other) that are assembled together by the interaction of the lenses themselves. The second lens group 200 includes at least one second lens, the second lens group 200 is supported by the bottom surface of the inner extension 302 and is disposed in the second groove, and the first lens group 100 and the second lens group 200 together form an imageable optical system. The first adhesive material 400 is located between the first lens group 100 and the first groove. The first adhesive material 400 is adapted to support and fix the first lens group 100 and the integrated lens barrel 300 after curing, so that the relative positions of the first lens group 100 and the second lens group 200 are maintained at the relative positions determined by active calibration based on the imaging result of the optical system.

In the above embodiments, the use of the integrated lens barrel 300 instead of the separate lens barrel provides high mechanical reliability of the optical lens based on active alignment, and can suppress variations in optical performance caused under conditions such as baking, high temperature and high humidity (due to the reduction in variation under conditions such as baking). Further, fig. 3 shows an optical lens based on active alignment using a split type lens barrel in a comparative example. Referring to fig. 3, the optical lens includes a first lens part including a first barrel 800 and a first lens mounted in the first barrel 800, and a second lens part including a second barrel 900 and a plurality of second lenses mounted in the second barrel 900. The first lens part and the second lens part are each actively calibrated as a whole and the relative position therebetween is determined, and then the first lens part and the second lens part are bonded with a first adhesive material 400 to support and fix the first lens part and the second lens part. Under such a scheme, the structural strength of the lens barrel (especially the first lens barrel 800) is relatively insufficient, which results in low mechanical reliability, and under conditions of baking, high temperature and high humidity, the first rubber material 400 and the lens barrel (especially the first lens barrel 800) may both vary, which results in a change in the relative position of the first lens and the second lens, thereby losing (or reducing) the optical performance (i.e., optical performance variation) obtained by active calibration. The present invention employs the integrated lens barrel 300 to overcome the above-mentioned problems.

Further, fig. 4 shows a schematic top view of the integrated lens barrel 300 according to an embodiment of the present invention. Referring to fig. 4, in one embodiment of the invention, the first section 3011 is in the shape of a closed loop in a top view. The first segment 3011 has a concave segment 3011a, and the concave segment 3011a is recessed from the inner side of the cylindrical body 301 toward the outer side of the cylindrical body 301. Fig. 5 illustrates a schematic sectional view of the integrated lens barrel 300 illustrated in fig. 4. Referring to fig. 1, 4 and 5, it can be seen that the first section 3011 of the inner side surface of the integrated lens barrel 300 has a concave section 3011a, and the concave section 3011a and the outer side surface of the first lens group 100 have a gap therebetween, and the gap can accommodate a clamping jaw, so that the clamping jaw clamps the first lens group 100 to perform active alignment in the first groove 303. Note that in fig. 5, the second lens group 200 is already inserted into the second groove 304 of the integrated lens barrel 300.

Further, fig. 6 shows a schematic top view of an integrated lens barrel 300 according to another embodiment of the present invention. Referring to fig. 6, in another embodiment of the invention, the first section 3011 is in the shape of a notched ring in a top view. Since the first segment 3011 has the gap 3011b, the integrated lens barrel 300 can be moved away from the clamping jaws, so that the clamping jaws clamp the first lens group 100 to perform active alignment in the first groove. Further, fig. 7 shows a schematic cross-sectional view of the integrated lens barrel 300 shown in fig. 6. Fig. 8 illustrates a schematic view of an optical lens employing the unitary lens barrel 300 illustrated in fig. 6 according to an embodiment of the present invention.

Further, still referring to fig. 1, in one embodiment of the present invention, the second section 3012 has a plurality of steps adapted to sequentially embed a plurality of second lenses to assemble the second lens group 200. In other words, after the assembly is completed, the unitary lens and the plurality of second lenses form a unitary second lens component, the first lens group 100 alone forms the first lens component, and the active calibration is to calibrate the relative positions of the first lens component and the second lens component.

Further, still referring to fig. 1, in an embodiment of the invention, a light shielding layer 101 is attached to a surface of the structure region 103 (including a top surface and a side surface of the structure region 103, and sometimes further including a bottom surface of the structure region 103) of the first lens group 100. Wherein the structured zone 103 is the area surrounding the optical zone 102. The optical zone 102 is the region of the lens cluster that is used for optical imaging. The light-shielding layer 101 may be a coating layer that does not transmit visible light but transmits only ultraviolet light. Thus, the first glue material 400 can be a glue material cured by ultraviolet light. The coating layer (i.e. the light shielding layer 101) can shield stray light or act as a diaphragm by not transmitting visible light, the structure is compact, and the exposure can be transmitted from the right top (i.e. the ultraviolet light is transmitted from the light shielding layer 101) when the glue material is cured, so that the glue material is more uniform compared with the side exposure. In contrast, in the split barrel scheme of the foregoing comparative example, due to the blockage of the upper first barrel 800, the first rubber material 400 needs to be cured by exposure from the side. Note that the first adhesive material 400 may also be an adhesive material triggered to cure by other wave bands, and at this time, the light shielding layer 101 does not transmit visible light but only transmits light in the wave band triggering the curing of the first adhesive material 400.

Further, fig. 9 shows an optical lens of one modified embodiment of the present invention. The present embodiment is based on the embodiment of fig. 1, and adds a light shielding plate 500. Accordingly, in the present embodiment, the first lens (or the first lens group 100) may not be attached with the light shielding layer. Specifically, in the present embodiment, the light shielding plate 500 may be bonded to the top surface (refer to the top surface of the cylindrical body 301) of the integrated lens barrel 300. The mask 500 is not in contact with the first lens (leaving a gap therebetween without adhesive). In this embodiment, the light shielding mechanism (i.e., the light shielding plate 500) does not participate in the assembly process related to the active calibration, so that height measurement is not required, the surface roughness is not required to be very small to ensure the height measurement accuracy, and the scratch defects are reduced (the smoother the surface is, the easier the scratch is). On the other hand, since the light-shielding mechanism can be separated from the lens (for comparison, the first barrel 800 in the above comparative example realizes the light-shielding function), since the light-shielding mechanism is not bonded to the lens, the selection of the material is not limited by the next group of barrels (i.e. the second barrel) (for comparison, in the above comparative example, the consideration of the performance variation of the optical system under the conditions of baking and the like can be reduced because the linear expansion coefficients of the materials on the two sides bonded by the glue material are close). Therefore, the light shielding plate 500 may be made of metal, so that the light shielding plate 500 may be made thinner. The light shielding plate 500 may be made of PET polyester, which has stable mechanochemical properties and can be directly used as an appearance surface. In contrast, in the above comparative examples, the final optical lens product requires a PET polyester sheet as the outer surface of the lens.

Further, fig. 10 shows an optical lens of another modified embodiment of the present invention. The present embodiment is also based on the embodiment of fig. 1, and adds a light shielding plate 500. In addition, in the present embodiment, the first lens (or the first lens group 100) may not be attached with the light shielding layer. The difference from the embodiment shown in fig. 9 is that in this embodiment, the light shielding plate 500 is adhered to the top surface of the structure region 103 of the first lens (or the first lens group 100). An air gap is reserved between the light shielding plate 500 and the top surface of the cylindrical main body 301, that is, no glue is arranged between the light shielding plate and the cylindrical main body. In this embodiment, the light shielding mechanism (i.e., the light shielding plate 500) does not participate in the assembly process related to the active calibration, so that height measurement is not required, the surface roughness is not required to be very small to ensure the height measurement accuracy, and the scratch defects are reduced (the smoother the surface is, the easier the scratch is). The light shielding mechanism of this embodiment is preferably made of the same material as the integrated lens barrel 300, and the plastic material is also selected from the same material as the material between the integrated lens barrel and the upper lens group, i.e. the material of the plastic material 501 for bonding the light shielding mechanism is the same as the material of the first plastic material 400. The objective is to make the variation of the glue material on both sides of the first lens group 100 consistent under the conditions of baking and the like, so as to reduce the performance degradation of the optical system as much as possible.

Further, fig. 11 shows a schematic top view of the integrated lens barrel 300 of one modified embodiment of the present invention. In this embodiment, the first segment 3011 of the unitary lens barrel 300 is annular and is not provided with a concave segment. In this embodiment, the diameter of the first segment 3011 may be larger than the diameter of the outer side of the first lens (or the first lens group 100), so that a space for accommodating the clamping jaw is formed between the first segment 3011 and the outer side of the first lens (or the first lens group 100), thereby avoiding the clamping position of the clamping jaw. At a position where the clamping jaw does not need to be avoided, the outer side surface of the first lens (or the first lens group 100) is optionally glued with the integrated lens barrel 300 by applying a glue material.

Further, fig. 12 shows an optical lens of another modified embodiment of the present invention. The present embodiment differs from the embodiment shown in fig. 6-8 in that a light shielding plate 500 is added, and the light shielding plate 500 has a side shield 502 adapted to the notch of the first segment 3011. In this embodiment, the first lens (or the first lens group 100) may not be attached with the light shielding layer. Specifically, in the present embodiment, the light shielding plate 500 may be bonded to the top surface of the cylindrical body 301. The mask 500 is not in contact with the first lens (leaving a gap therebetween without adhesive). In this embodiment, the light shielding mechanism (i.e., the light shielding plate 500) does not participate in the assembly process related to active calibration, so that height measurement is not required, the surface roughness is not required to be very small to ensure the height measurement accuracy, and scratches are not reduced. On the other hand, since the light shielding mechanism can be separated from the lens, the material selection is not limited by the next lens cone (i.e. the second lens cone) because the light shielding mechanism is not bonded with the lens. Therefore, the light shielding plate 500 may be made of metal, so that the light shielding plate 500 may be made thinner. The light shielding plate 500 may be made of PET polyester, which has stable mechanochemical properties and can be directly used as an appearance surface. In contrast, in the above comparative examples, the final optical lens product requires a PET polyester sheet as the outer surface of the lens.

Further, fig. 13 shows an optical lens of another modified embodiment of the present invention. The present embodiment differs from the embodiment shown in fig. 6-8 in that a light shielding plate 500 is added, and the light shielding plate 500 has a side shield 502 adapted to the notch of the first segment 3011. In this embodiment, the first lens (or the first lens group 100) may not be attached with the light shielding layer. The area of the embodiment shown in fig. 12 is that in this embodiment, the light shielding plate 500 is adhered to the top surface of the structure region 103 of the first lens (or the first lens group 100). An air gap is reserved between the light shielding plate 500 and the top surface of the cylindrical main body 301, that is, no glue is arranged between the light shielding plate and the cylindrical main body. In this embodiment, the light shielding mechanism (i.e., the light shielding plate 500) does not participate in the assembly process related to the active calibration, so that height measurement is not required, the surface roughness is not required to be very small to ensure the height measurement accuracy, and the scratch defects are reduced (the smoother the surface is, the easier the scratch is). In this embodiment, the material of the bonded light shielding mechanism is preferably the same as that of the integrated lens barrel 300, and the material of the adhesive material is also selected to be the same as that between the integrated lens barrel and the upper lens group, i.e. the material of the adhesive material 501 of the bonded light shielding mechanism is the same as that of the first adhesive material 400. The objective is to make the variation of the glue material on both sides of the first lens group 100 consistent under the conditions of baking and the like, so as to reduce the performance degradation of the optical system as much as possible.

Further, in one embodiment, the top surface of the inner extension 302 is adapted to dispose a glue material, for example, the inner extension 302 has a dimension in a direction perpendicular to the central axis to dispose the glue material.

According to another embodiment of the present invention, a camera module is further provided, and the camera module may include the optical lens according to any one of the embodiments.

According to another embodiment of the present invention, there is also provided an optical lens assembling method including the following steps.

S100, preparing an integrated lens barrel 300, the integrated lens barrel 300 including a cylindrical body 301 having an inner side surface and a central axis; and an inner extension portion 302, the inner extension portion 302 extends inward from the inner side surface and has a light through hole 302a in the center, the inner extension portion 302 divides the inner side surface into a first section 3011 and a second section 3012, wherein a top surface of the inner extension portion 302 and the first section 3011 form a first groove, and a bottom surface of the inner extension portion 302 and the second section 3012 form a second groove.

S200, mounting a second lens group 200 on the integrated lens barrel 300 to form a second lens component, wherein the second lens group 200 includes at least one second lens, and the second lens group 200 is supported on the bottom surface of the inner extension portion 302 and is disposed in the second groove.

S300, preparing a first lens group 100, wherein the first lens group 100 comprises a single first lens or a plurality of first lenses grouped together by virtue of the interaction of the lenses themselves.

S400, placing the first lens group 100 in the first groove, and then pre-positioning the first lens group 100 and the second lens component, so that the first lens group 100 and the second lens group 200 form an imageable optical system.

S500, actively calibrating the relative positions of the first lens group 100 and the second lens group 200 based on the actually measured imaging result.

S600, bonding the first lens group 100 and the first groove by the first adhesive material 400, and keeping the first lens group 100 and the second lens group 200 at the relative positions determined by the active calibration, thereby obtaining the optical lens.

Wherein S300 can be executed in parallel with S100-S200.

Further, in one embodiment, the first segment 3011 is in a closed ring shape in a top view, and the pre-positioning step (S400) and the active alignment step (S500) clamp the first lens group 100 to move, wherein a gap for accommodating the clamp is formed between the first segment 3011 and a side surface of the first lens group 100.

Further, in an embodiment, the first segment 3011 is in a ring shape with a notch in a top view, and in the pre-positioning step (S400) and the active calibration step (S500), the first lens group 100 is clamped by a clamp to move, where the clamp extends into the integrated lens barrel 300 through the notch and clamps the first lens group 100.

Further, in one embodiment, the second section 3012 has a plurality of steps, and the step (S200) of mounting the second lens group 200 to the unitary lens barrel 300 sequentially embeds the at least one second lens into the plurality of steps to assemble the second lens group 200 and constitute the second lens component.

Further, in one embodiment, in the step (S600) of bonding the first lens group 100 and the first groove by the first adhesive material 400, the first adhesive material 400 is only disposed between the bottom surface of the first lens group 100 and the top surface of the inner extension 302. In another embodiment, in step S600, the first adhesive material 400 is disposed between the bottom surface of the first lens group 100 and the top surface of the inner extension 302, and is disposed between the side surface of the first lens group 100 and the first segment 3011.

Further, in an embodiment, the assembling method further includes step S700.

S700, adhering the light shielding plate 500 to the top surface of the first lens group 100, and filling no adhesive material between the light shielding plate 500 and the top surface of the cylindrical main body 301. In this embodiment, the step of adhering the light shielding plate 500 (S700) may be performed after the step of adhering the first lens group 100 and the first groove by the first adhesive material 400 (S600) is completed.

In another embodiment, the step S700 may be replaced with S700'.

S700', a light shielding plate 500 is adhered to the top surface of the cylindrical body 301, and no adhesive material is filled between the light shielding plate 500 and the top surface of the first lens group 100. In this embodiment, the step of adhering the light shielding plate 500 (S700') may be performed after the step of adhering the first lens group 100 and the first groove by the first adhesive material 400 (S600) is completed.

Further, in one embodiment, the step S600 may include glue dispensing, exposing, and baking steps that are sequentially performed, and the step of adhering the shadow mask 500 may be performed after the exposing step and before the baking step. In the step of applying the adhesive, a first adhesive material 400 is disposed on the top surface of the inner extension portion 302, and in the step of exposing, ultraviolet rays (or light in other wavelength bands) trigger the first adhesive material 400 to perform a curing reaction, so that the first adhesive material 400 can temporarily support and fix the relative positions of the first lens component and the second lens component (i.e., the relative positions of the first lens group 100 and the integrated lens barrel 300). The baking step is to put the optical lens, which is temporarily supported and fixed, into an oven (or other equipment) for baking, so that the first glue material 400 is permanently cured, thereby improving the structural strength and reliability of the optical lens.

Further, according to another embodiment of the present invention, there is provided a method for assembling a camera module, which includes assembling an optical lens by using the method for assembling an optical lens according to any of the foregoing embodiments, and then mounting the assembled optical lens on a photosensitive assembly to obtain a finished camera module.

Herein, the lens barrel, the integrated lens barrel, the first lens barrel, the second lens barrel, and the like are all concepts of a lens barrel as a black object, and the lens barrels have a light shielding function.

In the present invention, the integrated lens barrel 300 may be mounted in an optical actuator (e.g., a motor). For example, the integrated lens barrel 300 may be mounted to an inner side surface of a motor carrier so as to be integrated with a motor. In the active calibration, the first lens group 100 is used as one component (which may be regarded as a first lens component), and the second lens group 200, the unitary lens barrel 300, and the motor are used as another component (which may be regarded as a second lens component), and the active calibration is performed between the two lens components.

The active calibration process used in the method for assembling an optical lens or a camera module will be further described below.

The active calibration described herein allows for adjustment of the relative positions of the first lens component 100 and the second lens component 200 in multiple degrees of freedom. FIG. 14A illustrates a relative position adjustment in active calibration in one embodiment of the invention. In this adjustment manner, the first lens part 100 (or the first lens 101) can move along the x, y, and z directions relative to the second lens part 200 (i.e., the relative position adjustment in this embodiment has three degrees of freedom). Where the z-direction is the direction along the optical axis and the x, y-directions are the directions perpendicular to the optical axis. The x, y directions both lie in a tuning plane P within which translation can be resolved into two components in the x, y directions.

FIG. 14B illustrates rotational adjustment in active calibration according to another embodiment of the present invention. In this embodiment, the relative position adjustment has an increased rotational degree of freedom, i.e., adjustment in the r direction, in addition to the three degrees of freedom of fig. 14A. In the present embodiment, the adjustment in the r direction is a rotation in the adjustment plane P, i.e. a rotation around an axis perpendicular to the adjustment plane P.

Further, fig. 14C shows a relative position adjustment manner with v and w direction adjustments added in the active calibration according to yet another embodiment of the present invention. Where 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 may be combined into a vector angle representing the total tilt state. That is, by the v-direction and w-direction adjustment, the tilt posture of the first lens component with respect to the second lens component (i.e., the tilt of the optical axis of the first lens component with respect to the optical axis of the second lens component) can be adjusted.

The adjustment of the above-mentioned six degrees of freedom x, y, z, r, v, and w may affect the imaging quality of the optical system (e.g., affect the magnitude of the resolution). In other embodiments of the present invention, the relative position adjustment may be performed by adjusting only any one of the six degrees of freedom, or by a combination of any two or more of the six degrees of freedom.

Further, in an embodiment, in the active calibration step, the adjustment of the relative position of the first lens component and the second lens component comprises a translation in said adjustment plane, i.e. a movement in the x, y direction.

Further, in one embodiment, in the active calibration step, the adjusting of the relative positions of the first lens component 100 and the second lens component further includes: and adjusting and determining an included angle of the axis of the first lens component relative to the axis of the second lens component, namely adjustment in the w and v directions according to the actually measured resolution force of the optical system. In the assembled optical lens or camera module, an included angle between the axis of the first lens component and the axis of the second lens component may be different from zero.

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

Further, in one embodiment, the first lens component may not have a first barrel. For example, the first lens component may be constituted by a single first lens. Before active calibration, pre-positioning correspondingly to ensure that a gap is reserved between the bottom surface of the first lens and the top surface of the second lens component; and then carrying out active calibration, arranging the rubber material in the gap and solidifying the rubber material. In this embodiment, the first lens may be formed by a plurality of sub-lenses which are integrally formed by being fitted or bonded to each other. In this embodiment, the side surfaces and the top surface of the non-optical surface of the first lens not used for imaging may be formed with the light shielding layer 101. The light shielding layer 101 may be formed by screen printing a light shielding material on the side and top surfaces of the first lens. Compared with the embodiment with the upper cover and the scheme of the split type lens cone (black object), the embodiment can reduce the size of the camera module head (object space) which originally occupies the screen of the mobile phone, so that the camera module can be closer to the side wall (or other frames) of the mobile phone when being installed in the mobile phone, and a higher screen occupation ratio is achieved.

Further, still referring to fig. 1, in one embodiment, the top surface of the structural region 103 of the first lens group 100 is higher than the top surface of the unitary lens barrel 300. Wherein the top surface is the end surface on the object side. The design can ensure that the top surface of the lens cone is lower than that of the lens, so that when the camera module is installed in a mobile phone, the lens cone as a structural part protrudes less, the size of the encroaching on a screen is smaller, and the screen occupation ratio is favorably improved. For example, when the camera module is used as a front camera, the lower top surface of the lens barrel is beneficial to avoiding the screen assembly, so that the screen extends to a position closer to a frame of the mobile phone, and the screen occupation ratio is improved.

In one embodiment, in the active calibration step, the second lens component may be fixed, the first lens component may be held by a clamp, and the first lens component may be moved by a six-axis movement mechanism connected to the clamp, so as to realize the relative movement between the first lens component and the second lens component in the above six degrees of freedom. The clamp can be supported against or partially supported against the side surface of the first lens component, so that the first lens component is clamped and position adjustment with multiple degrees of freedom is performed.

The above description is only a preferred embodiment of the present application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (32)

1. An integrated lens barrel, comprising:

a cylindrical body having an inner side surface and a medial axis; and

interior extension, interior extension certainly the medial surface is to the medial axis extends and the central authorities have logical unthreaded hole, interior extension will the medial surface is divided into first segmentation and second segmentation, the top surface of interior extension with first segmentation constitutes the first recess that is suitable for holding first lens crowd, the bottom surface of interior extension with the second segmentation constitutes the second recess that is suitable for holding second lens crowd.

2. The unitary lens barrel according to claim 1, wherein the first section has a closed ring shape in a top view.

3. The integrated lens barrel according to claim 1, wherein the first segment has a concave section that is recessed from an inner side of the cylindrical body in a direction facing an outer side surface of the cylindrical body.

4. The unitary lens barrel according to claim 3, wherein the first section has a notched ring shape in a top view.

5. The integrated lens barrel according to claim 1, wherein a top surface of the inner extension is adapted to be disposed with a glue material.

6. The integrated lens barrel according to claim 1, wherein the second segment has a multi-step adapted to sequentially insert a plurality of second lenses to assemble the second lens group; the bottom surface of the inner extension part is suitable for bearing the second lens group, and the top surface of the inner extension part is suitable for arranging a rubber material to bond the first lens group.

7. An optical lens, comprising:

an integrated lens barrel, comprising:

a cylindrical body having an inner side surface and a medial axis; and

the inner extension part extends inwards from the inner side surface, a light through hole is formed in the center of the inner extension part, the inner side surface is divided into a first section and a second section by the inner extension part, a first groove is formed by the top surface of the inner extension part and the first section, and a second groove is formed by the bottom surface of the inner extension part and the second section;

a first lens group including a single first lens or a plurality of first lenses grouped together by fitting or adhesion between the lenses;

a second lens group which comprises at least one second lens, wherein the second lens group is supported against the bottom surface of the inner extension part and is arranged in the second groove, and the first lens group and the second lens group jointly form an imaging optical system; and

and the first rubber material is positioned between the first lens group and the first groove.

8. An optical lens according to claim 1, characterized in that a first glue material is adapted to support and fix the first lens group and the integrated lens barrel after curing so that the relative positions of the first lens group and the second lens group are maintained at relative positions determined by active calibration based on the imaging result of the optical system.

9. An optical lens according to claim 7, characterized in that the first segment is in the shape of a closed ring in top view.

10. An optical lens according to claim 9, characterized in that the first segment has a concave section which is recessed from the direction of the inner side of the cylindrical body facing the outer side of the cylindrical body.

11. An optical lens barrel according to claim 9, wherein a light shielding plate is bonded to a top surface of the cylindrical body, the light shielding plate forms a diaphragm, and no adhesive material is filled between the light shielding plate and the first lens group.

12. An optical lens according to claim 9, characterized in that the first lens group comprises an optical area and a structural area surrounding the optical area, a top surface of the structural area is bonded with a light shielding plate, the light shielding plate forms a diaphragm, and no glue material is filled between the light shielding plate and the top surface of the cylindrical body.

13. An optical lens according to claim 7, characterized in that the first segment is in the shape of a notched ring in top view.

14. An optical lens barrel according to claim 11, wherein a light shielding plate is bonded to the top surface of the cylindrical body to form a diaphragm, the light shielding plate has a side stop adapted to the notch, and no adhesive material is filled between the light shielding plate and the first lens group.

15. An optical lens according to claim 11, characterized in that the first lens group includes an optical area and a structural area surrounding the optical area, a top surface of the structural area is bonded with a light shielding plate to form a diaphragm, the light shielding plate has a side baffle adapted to the notch, and no glue is filled between the light shielding plate and the top surface of the cylindrical body.

16. An optical lens as claimed in claim 11 or 14, characterized in that the light-shielding plate is bonded to a metal material or a material suitable for an external surface.

17. An optical lens barrel according to claim 12 or 15, wherein the light shielding plate and the integrated lens barrel are made of the same material, and the adhesive material for bonding the light shielding plate is made of the same material as the first adhesive material.

18. The optical lens of claim 7, wherein the first lens group includes an optical area and a structural area surrounding the optical area, a light shielding layer is attached to an outer surface of the structural area, and a top surface of the structural area is higher than a top surface of the unitary lens barrel.

19. The optical lens as claimed in claim 18, wherein the light shielding layer blocks visible light and transmits non-visible light of a specific wavelength band, and the non-visible light of the specific wavelength band is light for triggering a curing reaction of the first adhesive material.

20. An optical lens according to claim 7, characterized in that the second segment has a multi-step adapted to sequentially embed a plurality of second lenses to assemble the second lens group.

21. An optical lens as recited in claim 7, wherein the cylindrical body is integrally formed with the inner extension.

22. A camera module, characterized in that it comprises an optical lens according to any one of claims 7 to 21.

23. An optical lens assembly method, comprising:

preparing an integrated lens barrel including a cylindrical body having an inner side surface and a central axis; the inner extension part is extended inwards from the inner side surface, a light through hole is formed in the center of the inner extension part, the inner side surface is divided into a first section and a second section by the inner extension part, a first groove is formed by the top surface of the inner extension part and the first section, and a second groove is formed by the bottom surface of the inner extension part and the second section;

mounting a second lens group on the integrated lens barrel to form a second lens component, wherein the second lens group comprises at least one second lens, and the second lens group is supported against the bottom surface of the inner extension part and is arranged in the second groove;

preparing a first lens group, wherein the first lens group comprises a single first lens or a plurality of first lenses grouped together by virtue of the interaction of the lenses themselves;

placing the first lens group in the first groove, and then pre-positioning the first lens group and the second lens component to enable the first lens group and the second lens group to form an imageable optical system;

actively calibrating the relative positions of the first lens group and the second lens group based on the measured imaging result; and

and bonding the first lens group and the first groove through a first adhesive material, and keeping the first lens group and the second lens group at the relative positions determined by the active calibration so as to obtain the optical lens.

24. A method according to claim 23, wherein the first segment is in the form of a closed loop in top view;

in the pre-positioning step and the active calibration step, a clamp is used for clamping the first lens group to move, wherein a gap for accommodating the clamp is formed between the first segment and the side surface of the first lens group.

25. A method according to claim 23, wherein the first segment is in the shape of a notched ring in a top view;

in the pre-positioning step and the active calibration step, a clamp is used for clamping the first lens group to move, wherein the clamp extends into the integrated lens barrel through the notch and clamps the first lens group.

26. An optical lens assembling method according to claim 23, wherein the second segment has a multi-step;

in the step of mounting the second lens group to the integrated lens barrel, the at least one second lens is sequentially embedded into the multistage steps to assemble the second lens group and form the second lens component.

27. An optical lens assembly method according to claim 23, wherein in the step of bonding the first lens group and the first groove by a first adhesive material, the first adhesive material is arranged only between a bottom surface of the first lens group and a top surface of the inner extension portion; or the first rubber material is arranged between the bottom surface of the first lens group and the top surface of the inner extension part, and is also arranged between the side surface of the first lens group and the first segment.

28. An optical lens assembly method according to claim 23, wherein the first lens group includes an optical zone and a structural zone surrounding the optical zone;

the assembly method further comprises:

and a shading plate is adhered to the top surface of the structure area, and no glue material is filled between the shading plate and the top surface of the cylindrical main body.

29. An optical lens assembly method according to claim 23, further comprising:

and adhering a light shielding plate on the top surface of the cylindrical main body, and not filling glue between the light shielding plate and the top surface of the first lens group.

30. An optical lens assembling method according to claim 28 or 29, wherein the step of adhering the light shielding plate is performed after the step of adhering the first lens group and the first groove by the first glue material is completed.

31. An optical lens assembly method according to claim 28 or 29, wherein the step of bonding the first lens group and the first groove by a first adhesive material includes steps of applying adhesive, exposing, and baking, which are performed in sequence;

the step of adhering the light shielding plate is performed after the exposing step and before the baking step.

32. A camera module assembly method is characterized by comprising the following steps: assembling an optical lens using the optical lens assembly method of any one of claims 23 to 30; and

and assembling a camera module based on the optical lens.

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