CN113109913A - Optical lens, assembling method thereof, camera module and electronic equipment - Google Patents
Optical lens, assembling method thereof, camera module and electronic equipment Download PDFInfo
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- CN113109913A CN113109913A CN202110475564.0A CN202110475564A CN113109913A CN 113109913 A CN113109913 A CN 113109913A CN 202110475564 A CN202110475564 A CN 202110475564A CN 113109913 A CN113109913 A CN 113109913A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 143
- 238000000034 method Methods 0.000 title claims abstract description 52
- 239000003292 glue Substances 0.000 claims abstract description 78
- 239000000853 adhesive Substances 0.000 claims description 103
- 230000001070 adhesive effect Effects 0.000 claims description 103
- 238000001029 thermal curing Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 238000001723 curing Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 239000004838 Heat curing adhesive Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000004304 visual acuity Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004839 Moisture curing adhesive Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Lens Barrels (AREA)
Abstract
The invention relates to the technical field of lenses, and discloses an optical lens and an assembling method thereof, a camera module and electronic equipment, wherein the optical lens comprises a first lens group and a second lens group, the first lens group comprises a first lens barrel and the first lens group arranged on the first lens barrel, the second lens group comprises a second lens barrel and the second lens group arranged on the second lens barrel, the second lens barrel is provided with a first end surface facing an object side, the first end surface is provided with a groove, at least part of the first lens barrel is positioned in the groove and forms a first gap with the bottom wall of the groove, a second gap communicated with the first gap is formed between the first lens barrel and the side wall of the groove, the second gap is provided with bonding media, the bottom wall of the groove is provided with a first glue groove corresponding to the second gap, and the first glue groove is used for accommodating the bonding media overflowing from the second gap. By adopting the optical lens of the embodiment, the influence of glue variation on the relative position of the lens group in the optical axis direction can be reduced, and the assembly yield of the camera is improved.
Description
Technical Field
The invention relates to the technical field of lenses, in particular to an optical lens, an assembling method of the optical lens, a camera module and electronic equipment.
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 configured by grouping lenses, dividing a plurality of lenses into two lens groups, aligning the two lens groups by an AA (Active-Alignment) process, and dispensing glue between the two lens groups to bond and fix the two lens groups.
However, the variation (contraction or expansion) of the glue may cause the relative position of the two lens groups to change, which may cause inaccurate SFR (Spatial Frequency Response) result of the camera, and may affect the assembly yield of the camera.
Disclosure of Invention
The embodiment of the invention discloses an optical lens, an assembling method thereof, a camera module and electronic equipment, which can reduce the influence of glue variation on the relative position of a lens group in the optical axis direction and improve the assembling yield of a camera.
In a first aspect, an embodiment of the present invention discloses an optical lens, including a first lens group and a second lens group, the first mirror group comprises a first lens barrel and a first mirror group arranged on the first lens barrel, the second lens group comprises a second lens barrel and a second lens group arranged on the second lens barrel, the second lens cone is provided with a first end surface facing the object side, the first end surface is provided with a groove, at least part of the first lens cone is not positioned in the groove, and a first gap is formed between the first lens cone and the bottom wall of the groove, a second gap communicated with the first gap is formed between the periphery of the first lens barrel and the side wall of the groove, the second gap is provided with a bonding medium for fixing the first lens barrel in the groove, the bottom wall of the groove is provided with a first glue groove corresponding to the second gap, and the first glue groove is used for containing the bonding medium overflowing from the second gap.
The bonding of the first mirror group and the second mirror group is realized by arranging the bonding medium in the second gap, and the bonding medium overflowing from the second gap is accommodated in the first glue groove, so that the bonding medium is prevented from overflowing to the first gap, the situation that the relative positions of the first mirror group and the second mirror group are changed when the bonding medium is varied is avoided, the accurate SFR (Spatial Frequency Response (image resolution algorithm)) result of the optical lens is effectively ensured, and the assembly yield of the optical lens is high.
As an optional implementation manner, in the embodiment of the present invention, the width of the second gap is d1，0.05mm≤d1≤0.1mm。
The width of the second gap is beneficial to the AA process and the dispensing process of the optical lens during assembly.
As an optional implementation manner, in the embodiment of the present invention, the width of the first glue groove is d2，0.05mm≤d2≤0.1mm。
Through the width in first gluey groove, first gluey groove can satisfy and hold the bonding medium who overflows from the second clearance, and avoids bonding medium to overflow from first gluey groove to first clearance in the time, can make first lens cone self have great intensity.
As an optional implementation manner, in the embodiment of the present invention, the depth of the first glue groove is h1，h1≥0.1mm。
Through the degree of depth in first gluey groove, reduce the bonding medium and spill over the risk to first clearance from first gluey groove.
As an optional implementation mode, in the embodiment of the invention, the viscosity of the bonding medium is eta, and 30000cps eta is not less than 80000 cps.
Through the viscosity of the bonding medium, the bonding strength of the first mirror group and the second mirror group is high, the bonding medium is prevented from overflowing to the first gap, and the glue dispensing process is facilitated when the optical lens is assembled.
As an optional implementation manner, in an embodiment of the present invention, the first lens barrel further has a second end surface facing the object side, a height difference between the second end surface and the first end surface along an optical axis direction of the optical lens is Δ h, and Δ h is greater than or equal to 0.1mm and less than or equal to 0.35 mm.
Through the height difference between the second end surface and the first end surface, the risk that the bonding medium overflows to the second end surface when the adhesive is dispensed in the assembling process of the optical lens is reduced, the overall length of the optical lens is small, and the miniaturization design of the optical lens is facilitated.
As an optional implementation manner, in an embodiment of the present invention, the first end surface is further provided with a second glue groove, the second glue groove is arranged along a circumference of the groove, and the second glue groove is used for accommodating the bonding medium overflowing from the second gap.
Through set up the second at first terminal surface and glue the groove, can avoid bonding medium direct overflow to first terminal surface, lead to first terminal surface to receive bonding medium's pollution and influence the condition emergence of optical lens's performance.
In a second aspect, an embodiment of the present invention discloses a camera module, which includes a photosensitive assembly and the optical lens of the first aspect, wherein the photosensitive assembly is disposed on an image side of the optical lens. It can be understood that the camera module of the second aspect has the beneficial effects of the optical lens of the first aspect.
In a third aspect, an embodiment of the present invention discloses an electronic device, which includes a device main body and the camera module of the second aspect, where the camera module is disposed in the device main body. It can be understood that the electronic device of the third aspect has the beneficial effects of the camera module of the second aspect.
In a fourth aspect, an embodiment of the present invention discloses an assembling method, which is applied to the optical lens in the first aspect, and the method includes:
actively aligning the first mirror group and the second mirror group;
adding an adhesive medium to the second gap formed between the first mirror group and the second mirror group.
In the assembling method of the embodiment, the bonding medium is added to the second gap to fix the first lens barrel in the groove of the second lens barrel, and the first glue groove is used for accommodating the bonding medium overflowing from the second gap, so that the situation that the bonding medium overflows to the first gap when the bonding medium is added to the second gap can be avoided, the influence of glue variation on the relative position of the lens group in the optical axis direction is reduced, and the assembling yield of the camera is improved.
As an optional implementation manner, in an embodiment of the present invention, the adding of an adhesive medium to the second gap formed between the first mirror group and the second mirror group includes:
adding an adhesive medium into the second gap, so that the adhesive medium in the second gap is discontinuously distributed in a ring shape along the circumferential direction of the optical lens, and at least one notch is formed;
thermally curing the bonding medium located in the second gap;
filling an adhesive medium into the gap so that the adhesive medium in the second gap is continuous and annular along the circumferential direction of the optical lens;
and thermally curing the bonding medium positioned in the notch.
In the assembling method of the present embodiment, by using the notch design, it is possible to avoid the situation that the relative position of the first mirror group and the second mirror group is changed due to the thermal expansion of the air in the second gap when the adhesive medium in the second gap is thermally cured.
As an optional implementation manner, in an embodiment of the present invention, the adding an adhesive medium to the second gap so that the adhesive medium in the second gap is distributed in a discontinuous ring shape along a circumferential direction of the optical lens and forms at least one notch includes:
and adding bonding media into the second gap so as to form a plurality of sections of bonding media extending and distributed along the circumferential direction of the optical lens in the second gap, wherein the plurality of sections of bonding media are symmetrically distributed by taking the optical axis of the optical lens as the center, and the gap is formed between the bonding media at two adjacent ends.
By forming a plurality of gaps, more air escape channels are provided for the air in the second gap during thermal curing, and the air escape efficiency is improved.
As an optional implementation manner, in an embodiment of the present invention, the adding an adhesive medium to the second gap so that the adhesive medium in the second gap is distributed in a discontinuous ring shape along a circumferential direction of the optical lens and forms at least one notch includes:
and adding a bonding medium into the second gap to form a bonding medium at one end extending along the circumferential direction of the optical lens in the second gap, wherein the gap is formed by the bonding medium at the end-to-end interval.
Through forming a breach, when satisfying the air escape in the thermocuring in the second clearance, reduce the follow-up number of times that adopts bonding medium to seal the breach, reduce the process, improve the packaging efficiency.
As an optional implementation manner, in an embodiment of the present invention, a width of the notch along a circumferential direction of the optical lens is d3，0.2mm≤d3≤1mm。
By the width of the notch, the situation that the relative position of the first mirror group and the second mirror group is changed during thermocuring is avoided.
Compared with the prior art, the embodiment of the invention at least has the following beneficial effects:
the embodiment of the invention provides an optical lens and an assembly method thereof, a camera module and electronic equipment, wherein a groove is arranged on a first end surface of a second lens barrel of a second lens group, at least part of a first lens barrel of the first lens group is positioned in the first groove, a first gap is formed between the bottom wall of the groove and the first lens barrel, a second gap communicated with the first gap is formed between the side wall of the first lens barrel and the side wall of the groove, meanwhile, an adhesive medium is arranged in the second gap to realize the adhesion of the first lens barrel and the second lens barrel, a first glue groove is arranged on the bottom wall of the groove, so that the first glue groove can accommodate the adhesive medium overflowing from the second gap, the adhesive medium is prevented from overflowing to the first gap, the condition that the relative position of the first lens group and the second lens group is changed due to the variation of the adhesive medium is avoided, the image resolving power algorithm result of the optical lens is accurate, the 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 needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for a person skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an optical lens according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second lens barrel according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a camera module according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device disclosed in the third embodiment of the present invention;
FIG. 5 is a flow chart of an assembling method according to the fourth embodiment of the present invention;
FIG. 6 is a flow chart of another method of assembly disclosed in fifth embodiment of the present invention;
fig. 7 is a schematic structural diagram of an optical lens (two notches) according to a fifth embodiment of the present invention;
fig. 8 is a schematic structural diagram of an optical lens (a notch) according to a fifth embodiment of the present invention;
fig. 9 is a schematic structural diagram of an optical lens (the adhesive medium is annular) according to a fifth 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 by those skilled in the art as appropriate.
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.
Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), 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 optical lens, an assembling method thereof, a camera module and electronic equipment, which can reduce the influence of glue variation on the relative position of a lens group in the optical axis direction and improve the assembling yield of a camera.
Example one
Referring to fig. 1 and fig. 2 together, a schematic structural diagram of an optical lens 100 according to an embodiment of the present invention is shown, in which the optical lens 100 includes a first lens group 10 and a second lens group 11, the first lens group 10 includes a first lens barrel 101 and a first lens group 102 mounted on the first lens barrel 101, the second lens group 11 includes a second lens barrel 111 and a second lens group 112 mounted on the second lens barrel 111, the second lens barrel 111 has a first end surface 11a facing an object side, the first end surface 11a is provided with a groove 11b, the first lens barrel 101 is at least partially located in the groove 11b and forms a first gap a with a bottom wall of the groove 11b, a second gap b communicating with the first gap a is formed between an outer circumference of the first lens barrel 101 and a sidewall of the groove 11b, the second gap b is provided with an adhesive medium 12 to fix the first lens barrel 101 in the groove 11b, the bottom wall of the groove 11b is provided with a first glue groove 11c corresponding to the second gap b, and the first glue groove 11c is used for accommodating the bonding medium 12 overflowing from the second gap b.
It can be understood that, when the optical lens 100 is assembled, an AA (Active-Alignment) process is usually required to be performed, after the AA process of the optical lens 100, after the relative positions of the first mirror group 10 and the second mirror group 11 along the optical axis c of the optical lens 100 are aligned accurately, the first gap a is formed between the first mirror group 10 and the second mirror group 11 along the optical axis c direction of the optical lens 100, that is, the size of the first gap a is determined according to the actual situation of the AA process, which is not limited in this embodiment. The optical axis c of the optical lens 100 is shown by a dashed line c in fig. 1.
Considering the possibility of variation of the bonding medium 12, for example, the bonding medium 12 may shrink when being cured, and may expand when being heated, the variation of the bonding medium 12 may cause the relative positions of the first mirror group 10 and the second mirror group 11 to change along the direction of shrinkage or expansion of the bonding medium 12. Therefore, the present embodiment achieves the bonding of the first mirror group 10 and the second mirror group 11 by forming the second gap b between the sidewalls of the grooves 11b of the first barrel 101 and the second barrel 111 while disposing the bonding medium 12 in the second gap b. At this time, even if the adhesive medium 12 in the second gap b is varied, since the contraction or expansion direction of the adhesive medium 12 is along the radial direction of the optical lens 100 and the forces of contraction or expansion of the adhesive medium 12 at the respective positions in the circumferential direction of the optical lens 100 in the second gap b are cancelled out to be in a relatively balanced state, the relative positions of the first lens group 10 and the second lens group 11 are not changed by the variation of the adhesive medium 12 in the second gap b, and the results of the SFR (Spatial Frequency Response algorithm) of the optical lens 100 are ensured to be accurate, and the assembly yield of the optical lens is high.
Further, considering that the adhesive medium 12 in the second gap b may overflow into the first gap a before the adhesive medium 12 is cured, if the adhesive medium 12 overflowing into the first gap a varies, the relative positions of the first mirror group 10 and the second mirror group 11 in the direction of the optical axis c may vary. Therefore, the present embodiment also provides the first glue groove 11c corresponding to the second gap b on the bottom wall of the groove 11b, and the glue groove is used to accommodate the bonding medium 12 overflowing from the second gap b, thereby avoiding the bonding medium 12 overflowing to the first gap a.
In this embodiment, the bonding medium 12 may be a UV (Ultraviolet) thermal curing adhesive. In some other embodiments, the bonding medium 12 may also be a thermal curing adhesive, a photo curing adhesive, a moisture curing adhesive, etc., which is not limited in this embodiment.
It is understood that when the adhesive medium 12 is a UV heat curing adhesive or a heat curing adhesive, the adhesive medium 12 needs to be heat cured after the adhesive medium 12 is added into the second gap b during the assembly of the optical lens 100. At this time, the adhesive medium 12 may be added into the second gap b in several times and the adhesive medium 12 added in each time may be thermally cured, specifically as follows:
first, the adhesive medium 12 may be added into the second gap b, and the adhesive medium 12 may be discontinuously distributed in a ring shape in the second gap b to form at least one gap, and the adhesive medium located in the second gap b may be heated to be cured. Then, the adhesive medium 12 is added to the notch so that the adhesive medium 12 in the second gap b is in a continuous ring shape along the circumferential direction of the optical lens 100, that is, the notch is filled so that the adhesive medium is complete and continuous as a whole, and the adhesive medium 12 at the notch is heated to cure the adhesive medium at the notch. It can be understood that, when the bonding medium is disposed in the second gap, the bonding medium is formed in stages and cured in stages, that is, the gap is formed when the bonding medium is disposed in the first stage, and by using the gap formed when the bonding medium 12 is added for the first time, an air escape channel can be provided for the air expanded by heat in the first gap a when the bonding medium in the first stage is thermally cured, so as to avoid a situation that the relative positions of the first lens group 10 and the second lens group 11 are changed when the air in the first gap a is expanded by heat by applying a force to the first lens barrel 101 and the second lens barrel 111. Then, the bonding medium is arranged at the second stage, mainly to fill the gap, so that the arrangement amount of the bonding medium in the second gap is increased, and the bonding between the second mirror group and the first mirror group is ensured to be reliable.
Considering that the assembly process of the optical lens 100 at least includes the AA processes of the first mirror group 10 and the second mirror group 11, and the adhesive medium 12 is disposed in the second gap b, especially the adhesive medium 12 is disposed in the first gap a through a glue dispensing process when the optical lens 100 is assembled. Therefore, the properties of the adhesive medium 12 and the size of the partial structure (e.g., the second gap b, the first glue groove 11c, etc.) of the optical lens 100 should be designed in conjunction with the assembly process of the optical lens 100. The method comprises the following specific steps:
illustratively, the viscosity of the bonding medium 12 is η, 30000cps η 80000 cps. It can be understood that, if the viscosity η of the adhesive medium 12 is less than 30000cps, the fluidity of the adhesive medium 12 is large, most of the adhesive medium 12 overflows to the first glue groove 11c before the adhesive medium 12 is cured, even overflows to the first gap a after filling the first glue groove 11c, only a small portion of the adhesive medium 12 adheres to the first gap a, which affects the adhesive strength of the first mirror group 10 and the second mirror group 11, and there is a risk that the adhesive medium 12 overflows to the first gap a, which causes a change in the relative position of the first mirror group 10 and the second mirror group 11. If the viscosity η of the adhesive medium 12 is larger than 80000cps, the optical lens 100 needs to use a rubber pin with a larger tube diameter when assembling, especially when adding the adhesive medium 12 to the second gap b through a rubber pin, and the optical lens 100 has a smaller size (the width of the second gap b is smaller) and cannot be matched. Therefore, the viscosity η of the bonding medium 12 may be 30000cps η ≦ 80000cps, the bonding strength between the first mirror group 10 and the second mirror group 11 is high, the bonding medium 12 is prevented from overflowing to the first gap a, and the dispensing process is facilitated, and the viscosity η of the bonding medium 12 may be 30000cps, 40000cps, 50000cps, 60000cps, 70000cps, 80000cps, or the like.
Illustratively, as shown in FIG. 1, the second gap b has a width d1，0.05mm≤d1Less than or equal to 0.1 mm. It will be appreciated that if the width d of the second gap b is provided1If the distance is less than 0.05mm, when the AA process is performed on the optical lens 100, the adjustment amount of the relative position of the first lens group 10 and the second lens group 11 along the radial direction of the optical lens 100 is small, which may easily cause inaccurate alignment or contact between a part of the sidewall of the groove 11b and the first barrel 101. Since the width of the glue drop is generally 0.08 mm-0.12 mm during dispensing, if the width d of the second gap b is larger than the width d of the first gap b1If the width of the second gap b is larger than 0.1mm, the adhesive drops are difficult to adhere to the second gap b during dispensing even if the adhesive drops with the width of 0.12mm at most are used. Thus, the width d of the second gap b1D can be more than or equal to 0.05mm1Less than or equal to 0.1mm, which is beneficial to the AA manufacture procedure and the glue dispensing procedure, and the width d of the second gap b1Can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, etc.
In this embodiment, the width of the first glue groove 11c is d2，0.05mm≤d2Less than or equal to 0.1 mm. It can be understood that if the width d of the first glue groove 11c is wide2If the width of the glue drops is less than 0.05mm, glue drops with the width of 0.08mm to 0.12mm overflow to the first glue groove 11c during glue dispensing, and then the glue drops overflow from the first glue groove 11c to the first gap a. Even if the glue drops with the width of 0.12mm at most are adopted, the width of the glue drops is gradually reduced in the process that the glue drops overflow from the second gap b to the first glue groove 11c, the width of the glue drops reaching the first glue groove 11c is generally smaller than 0.1mm, and then the width d of the first glue groove 11c2Greater than 0.1mm transBut affects the strength of the first barrel 101 itself. Therefore, the width d of the first glue groove 11c2D can be more than or equal to 0.05mm2Less than or equal to 0.1mm, the first glue groove 11c can satisfy the condition of accommodating the bonding medium 12 overflowing from the second gap b, and the bonding medium 12 is prevented from overflowing from the first glue groove 11c to the first gap a, meanwhile, the first lens barrel 101 can have larger strength, and the width d of the first glue groove 11c2Can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, etc.
Further, the depth of the first glue groove 11c is h1，h1Not less than 0.1 mm. It will be appreciated that if the depth h of the first glue groove 11c is provided1If the width of the first glue groove 11c is less than 0.1mm, the glue drops with larger height overflow from the second gap b to the first glue groove 11c, and then overflow from the first glue groove 11c to the first gap a. Therefore, the depth h of the first glue groove 11c1Can be h1Not less than 0.1mm, reduces the risk that the bonding medium 12 overflows from the first glue groove 11c to the first gap a, and the depth h of the first glue groove 11c1Can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc.
Exemplarily, the first barrel 101 further has a second end surface 101a facing the object side, and a height difference between the second end surface 101a and the first end surface 11a along the optical axis c direction of the optical lens 100 is Δ h, where Δ h is greater than or equal to 0.1mm and less than or equal to 0.35 mm. It can be understood that, during the dispensing process, the distance from the rubber tube to the dispensing surface (the first end surface 11a) is usually 0.05mm to 0.1mm, and if Δ h is less than 0.1mm, there is a risk that the rubber tube directly overflows to the second end surface 101a during dispensing, thereby affecting the performance of the optical lens 100. If Δ h is greater than 0.35mm, the height difference between the first end surface 11a and the second end surface 101a is large, and the overall length of the optical lens 100 is large, which is not favorable for the miniaturization design of the optical lens 100. Therefore, the height difference Δ h between the second end surface 101a and the first end surface 11a may be 0.1mm or more and 0.35mm or less, the risk of the adhesive medium 12 overflowing to the second end surface 101a during dispensing is low, and the overall length of the optical lens 100 is small, which is beneficial to the miniaturization design of the optical lens 100.
In some embodiments, the first end surface 11a is further provided with a second glue groove 11d, the second glue groove 11d is disposed along a circumference of the groove 11b, and the second glue groove 11d is used for accommodating the bonding medium 12 overflowing from the second gap b. It can be understood that, by providing the second glue groove 11d on the first end surface 11a to accommodate the adhesive medium 12 overflowing from the second gap b, it is possible to avoid the situation that the adhesive medium 12 directly overflows to the first end surface 11a, which results in the first end surface 11a being contaminated by the adhesive medium 12 and affecting the performance of the optical lens 100.
It can be known that, in the present embodiment, the first glue groove 11c and the second glue groove 11d provide an accommodating space for the bonding medium 12 overflowing from the two gaps, so that the occurrence of the condition that the bonding medium 12 overflows to the first gap a or the first end surface 11a can be effectively avoided, and the performance and the assembly yield of the optical lens 100 are high.
In the optical lens 100 according to the first embodiment of the present invention, a groove 11b is disposed on a first end surface 11a of a second barrel 111 of a second lens group 11, at least a portion of a first barrel 101 of the first lens group 10 is disposed in the first groove 11b, a first gap a is formed between the bottom wall of the groove 11b and the first barrel 101, a second gap b communicated with the first gap a is formed between the side walls of the first barrel 101 and the groove 11b, an adhesive medium 12 is disposed in the second gap b to bond the first barrel 101 and the second barrel 111, a first glue groove 11c is disposed on the bottom wall of the groove 11b, so that the first glue groove 11c can accommodate an adhesive medium 12 overflowing from the second gap b, and prevent the adhesive medium 12 from overflowing to the first gap a, thereby preventing the relative position of the first lens group 10 and the second lens group 11 from changing due to a variation in the adhesive medium 12, the image resolving power algorithm result of the optical lens 100 is accurate, and the assembly yield of the optical lens is high.
Example two
Referring to fig. 3, which is a schematic structural view of a camera module 200 according to a second embodiment of the present disclosure, the camera module 200 includes a photosensitive element 20 and the optical lens 100 according to the first embodiment, and the photosensitive element 20 is disposed on an image side of the optical lens 100.
The photosensitive assembly 20 includes a substrate 201 and a photosensitive element 202, the photosensitive element 202 is disposed on the substrate 201, the driving device 21 is disposed on the substrate 201, and an optical axis of the optical lens 100 coincides with an optical axis of the photosensitive element 202. Wherein the optical axis of the optical lens 100 and the optical axis of the light sensing element 202 are shown by the dashed line c in fig. 3. It is understood that the photosensitive assembly 20 is used to receive the light signal for converting into an image, and the above description of the photosensitive assembly 20 is intended to illustrate one possible solution, not to specifically limit the photosensitive assembly 20 of the present embodiment, and in some other embodiments, the photosensitive assembly 20 may have other structural solutions.
Alternatively, the substrate 201 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 201 may be selected according to actual situations to meet different usage requirements, and this embodiment is not particularly limited thereto.
Illustratively, the photosensitive element 202 may be a CCD (Charge-coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor). Different types of the photosensitive elements 202 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 20 can be matched with different substrates 201 and photosensitive elements 202 according to actual needs, so as to meet different use requirements.
The second embodiment of the present invention provides a camera module 200, which has an accurate result of the image resolution algorithm of the optical lens 100 and a high yield rate of assembling the optical lens 100.
EXAMPLE III
Referring to fig. 4, which is a schematic diagram of a structure of an electronic apparatus 300 according to a third embodiment of the present invention, the electronic apparatus 300 includes an apparatus main body 30 and a camera module 200 according to a second embodiment, and the camera module 200 is disposed on the apparatus main body 30.
The electronic device 300 of the present embodiment may be, for example, a mobile phone, a tablet computer, a camera, a monitoring probe, or the like. The camera module 200 can be fixed or movably disposed on the device body 30, and when the electronic device 30 is a mobile phone or a tablet, the camera module 200 can be a front camera module or a rear camera module of the mobile phone or the tablet.
The third embodiment of the present invention provides an electronic device 300, in which the result of the image analysis algorithm of the camera module 200 is accurate, and the assembly yield of the camera module 200 is high.
Example four
Referring to fig. 5, a flow chart of an assembly method according to a fourth embodiment of the present invention is shown, and the assembly method is applied to an optical lens according to the first embodiment, and the structure of the optical lens refers to fig. 1, and the assembly method includes the following steps:
401. the first mirror group 10 and the second mirror group 11 are actively aligned.
It can be understood that, when the optical lens is assembled, an AA (Active-Alignment) process is usually required, after the optical lens is assembled in the a process, after the relative positions of the first lens group 10 and the second lens group 11 along the optical axis of the optical lens are aligned accurately, the first gap communicating with the second gap is formed between the first lens group 10 and the second lens group 11 along the optical axis of the optical lens.
402. An adhesive medium 12 is added to a second gap formed between the first mirror group 10 and the second mirror group 11.
It can be understood that, when step 402 is performed, as shown in fig. 1, if the adhesive medium 12 overflows from the second gap b to the first gap a, the first glue groove 11c can accommodate the adhesive medium 12 overflowing from the second gap b, so as to avoid the adhesive medium 12 overflowing to the first gap a, reduce the influence of glue variation on the relative position of the lens group in the optical axis direction, and improve the assembly yield of the optical lens.
The fourth embodiment of the invention provides an assembling method, which can avoid the occurrence of the situation that the bonding medium overflows to the first gap, thereby reducing the influence of glue variation on the relative position of the lens group in the optical axis direction and improving the assembling yield of the optical lens.
EXAMPLE five
Please refer to fig. 6, which is a flowchart illustrating an assembly method according to a fifth embodiment of the present invention, applied to an optical lens according to the first embodiment, where the structure of the optical lens refers to fig. 1, the assembly method includes the following steps:
501. the first mirror group 10 and the second mirror group 11 are actively aligned, and a second gap is formed between the first mirror group 10 and the second mirror group 11.
502. And adding the bonding medium 12 into the second gap, so that the bonding medium 12 in the second gap is distributed in a discontinuous ring shape along the circumferential direction of the optical lens, and at least one notch 13 is formed.
It can be understood that, by implementing the step 502, the first mirror group 10 and the second mirror group 11 can be bonded by the bonding medium 12 in the second gap, so that the positions of the first mirror group 10 and the second mirror group 11 are relatively fixed, but the bonding medium 12 is not completely cured at this time, and the bonding strength between the first mirror group 10 and the second mirror group 11 is low. In other words, the bonding medium 12 needs to be thermally cured to ensure the bonding strength of the first mirror group 10 and the second mirror group 11, so as to avoid the situation that the relative positions of the first mirror group 10 and the second mirror group 11 are changed. Considering that the air in the second gap between the first mirror group 10 and the second mirror group 11 expands by heat when the adhesive medium 12 is thermally cured, there is a risk that the relative positions of the first mirror group 10 and the second mirror group 11 in the optical axis direction of the optical lens are changed by the force exerted by the expanded gas on the first mirror group 10 and the second mirror group 11. Therefore, when the step 102 is performed, the bonding medium 12 in the second gap can form at least one notch 13, and when the thermal curing is performed, the air in the second gap can flow out from the notch 13 by thermal expansion, so that air escape is realized, and the influence of the thermally expanded air on the relative position of the first lens group 10 and the second lens group 11 is avoided.
Illustratively, as shown in fig. 7 and 8, the width of the notch 13 in the circumferential direction of the optical lens is d3，0.2mm≤d3Less than or equal to 1 mm. It will be appreciated that if the width d of the notch 13 is such that3If the diameter is less than 0.2mm, the efficiency of air escape from the gap 13 is low when the air in the second gap is thermally expanded, and the air escape efficiency is lower than the expansion speed, so that part of the air cannot escape from the gap 13 in time, and the first mirror group 10 and the second mirror group 11 are pressed, so that the first mirror group 10 and the second mirror group 11 are pressed, and the first mirror group is formedThe relative positions of the mirror group 10 and the second mirror group 11 in the optical axis direction of the optical lens are changed. If the width d of the notch 13 is small3If the thickness is greater than 1mm, the distribution of the adhesive medium 12 in the second gap is relatively uneven, and when the adhesive medium 12 is cured and shrunk, the relative positions of the first mirror group 10 and the second mirror group 11 in the radial direction of the optical lens are changed due to unbalanced shrinkage force. Thus, the width d of the notch 133D can be more than or equal to 0.2mm3Less than or equal to 1mm, and avoids the situation that the relative positions of the first mirror group 10 and the second mirror group 11 are changed during thermal curing.
As an optional implementation manner, the step 502 may specifically be:
and adding the bonding medium 12 into the second gap to form a plurality of sections of bonding media 12 extending and distributed along the circumferential direction of the optical lens in the second gap, wherein the plurality of sections of bonding media 12 are symmetrically distributed by taking the optical axis of the optical lens as the center, and the gap 13 is formed between two adjacent sections of bonding media 12. At this time, the distribution of the adhesive medium 12 in the second gap is as shown in fig. 7. It can be understood that, in the above manner, a plurality of gaps 13 can be formed to provide more air escape channels for the air in the second gap during thermal curing, thereby improving the air escape efficiency.
As another optional implementation, the step 502 may specifically be:
and adding the bonding medium 12 to the second gap to form a section of bonding medium 12 extending along the circumferential direction of the optical lens in the second gap, wherein the section of bonding medium 12 forms the notch 13 at intervals from head to tail. At this time, the distribution of the adhesive medium 12 in the second gap is as shown in fig. 8. It can be understood that, considering that the gap 13 needs to be sealed by the adhesive medium 12 in the subsequent process, so as to prevent foreign matters (such as water, dust, etc.) from entering between the first lens group 10 and the second lens group 11 from the gap 13, and affecting the performance of the optical lens, by adopting the above manner, only one gap 13 is formed, and while the air in the second gap escapes during thermal curing, the number of times of subsequently sealing the gap 13 by the adhesive medium 12 is reduced, the process is reduced, and the assembly efficiency is improved.
503. The bonding medium 12 located in the second gap is thermally cured.
It can be understood that, by performing step 503, after the adhesive medium 12 in the second gap is cured, the adhesive strength of the adhesive medium 12 is large, and the adhesive strength between the first mirror group 10 and the second mirror group 11 can be improved.
The bonding medium 12 of the present embodiment is a thermal curing adhesive. In some other embodiments, the bonding medium 12 may also be a UV (Ultraviolet) heat curing glue, and then after step 502 and before step 503, the bonding medium 12 located in the second gap is further subjected to Ultraviolet curing.
504. The notch 13 is filled with the adhesive medium 12 so that the adhesive medium 12 in the second gap is continuous in a ring shape along the circumferential direction of the optical lens.
At this time, the distribution of the adhesive medium 12 in the second gap is as shown in fig. 9. It can be understood that, by filling the adhesive medium 12 at the notch 13, the adhesive medium 12 in the second gap can form a continuous ring shape to close the second gap, so as to avoid the foreign matter (such as water, dust, etc.) from entering between the first mirror group 10 and the second mirror group 11 from the notch 13 of the adhesive medium 12 through the second gap, and ensure good performance of the optical lens.
505. The adhesive medium 12 located at the notch 13 is thermally cured.
It is understood that, by implementing step 505, the adhesive medium 12 added in steps 502 and 504 can be well joined, and the adhesive medium 12 added in step 504 is separated from the adhesive medium 12 added in step 502, so that the notch 13 cannot be closed.
The bonding medium 12 of the present embodiment is a thermal curing adhesive. In some other embodiments, the bonding medium 12 may also be a UV (Ultraviolet) thermal curing adhesive, and after step 504 and before step 505, the bonding medium 12 at the gap is further subjected to Ultraviolet curing.
Fifth, an assembling method is provided in an embodiment of the present invention, which can avoid a situation that when the adhesive medium 12 in the second gap is thermally cured, the relative positions of the first mirror group 10 and the second mirror group 11 are changed due to thermal expansion of air in the second gap.
The optical lens, the assembling method thereof, the camera module, and the electronic device disclosed in the embodiments of the present invention are introduced in detail, and a principle and an implementation of the present invention are explained herein by applying an example, and the description of the above embodiments is only used to help understanding an optical lens, an assembling method thereof, a camera module, an electronic device, and a 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 (14)
1. An optical lens, comprising:
the lens group comprises a first lens group and a second lens group, wherein the first lens group comprises a first lens barrel and a first lens group arranged on the first lens barrel; and
the second lens group comprises a second lens barrel and a second lens group arranged on the second lens barrel, the second lens barrel is provided with a first end face facing the object side, the first end face is provided with a groove, at least part of the first lens barrel is positioned in the groove and forms a first gap with the bottom wall of the groove, a second gap communicated with the first gap is formed between the periphery of the first lens barrel and the side wall of the groove, the second gap is provided with a bonding medium for fixing the first lens barrel in the groove, the bottom wall of the groove is provided with a first glue groove corresponding to the second gap, and the first glue groove is used for containing the bonding medium overflowing from the second gap.
2. An optical lens according to claim 1, characterized in that the width of the second gap is d1，0.05mm≤d1≤0.1mm。
3. An optical lens according to claim 1, characterized in that the first lensThe width of the glue groove is d2，0.05mm≤d2≤0.1mm。
4. An optical lens according to claim 1, wherein the depth of the first glue groove is h1，h1≥0.1mm。
5. An optical lens as claimed in any one of claims 1 to 4, wherein the viscosity of the adhesive medium is η, 30000cps η ≦ 80000 cps.
6. The optical lens barrel according to any one of claims 1 to 4, wherein the first barrel further has a second end surface facing the object side, and a height difference between the second end surface and the first end surface in an optical axis direction of the optical lens is Δ h, and Δ h is 0.1mm or more and 0.35mm or less.
7. An optical lens according to any one of claims 1 to 4, wherein the first end surface is further provided with a second glue groove, the second glue groove is arranged along a circumference of the groove, and the second glue groove is used for accommodating the bonding medium overflowing from the second gap.
8. A camera module, comprising a photosensitive element and the optical lens of any one of claims 1 to 7, wherein the photosensitive element is disposed on an image side of the optical lens.
9. An electronic apparatus comprising an apparatus main body and the camera module according to claim 8, the camera module being provided to the apparatus main body.
10. An assembling method of an optical lens, applied to the optical lens according to any one of claims 1 to 7, the assembling method comprising:
actively aligning the first mirror group and the second mirror group;
adding an adhesive medium to the second gap formed between the first mirror group and the second mirror group.
11. The method of assembling of claim 10, wherein said adding an adhesive medium to said second gap formed between said first mirror group and said second mirror group comprises:
adding an adhesive medium into the second gap, so that the adhesive medium in the second gap is discontinuously distributed in a ring shape along the circumferential direction of the optical lens, and at least one notch is formed;
thermally curing the bonding medium located in the second gap;
filling an adhesive medium into the gap so that the adhesive medium in the second gap is continuous and annular along the circumferential direction of the optical lens;
and thermally curing the bonding medium positioned in the notch.
12. The assembly method according to claim 11, wherein the adding the adhesive medium to the second gap to make the adhesive medium in the second gap in a discontinuous ring-shaped distribution along the circumferential direction of the optical lens and form at least one notch comprises:
and adding bonding media into the second gap so as to form a plurality of sections of bonding media extending and distributed along the circumferential direction of the optical lens in the second gap, wherein the plurality of sections of bonding media are symmetrically distributed by taking the optical axis of the optical lens as the center, and the gap is formed between two adjacent sections of bonding media.
13. The assembly method according to claim 11, wherein the adding the adhesive medium to the second gap to make the adhesive medium in the second gap in a discontinuous ring-shaped distribution along the circumferential direction of the optical lens and form at least one notch comprises:
and adding a bonding medium into the second gap to form a section of bonding medium extending along the circumferential direction of the optical lens in the second gap, wherein the section of bonding medium forms the notch at intervals from head to tail.
14. The assembly method according to any one of claims 11 to 13, wherein the width of the notch in the circumferential direction of the optical lens is d3，0.2mm≤d3≤1mm。
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| CN202110475564.0A CN113109913A (en) | 2021-04-29 | 2021-04-29 | Optical lens, assembling method thereof, camera module and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117014713A (en) * | 2023-09-26 | 2023-11-07 | 荣耀终端有限公司 | Camera module and electronic equipment |
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| CN207336891U (en) * | 2016-11-28 | 2018-05-08 | 宁波舜宇光电信息有限公司 | More group's camera lenses and camera module |
| CN110275261A (en) * | 2018-03-16 | 2019-09-24 | 宁波舜宇光电信息有限公司 | Optical lens, camera module and its assemble method |
| CN214845971U (en) * | 2021-04-29 | 2021-11-23 | 南昌欧菲光电技术有限公司 | Optical lens, camera module and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207336891U (en) * | 2016-11-28 | 2018-05-08 | 宁波舜宇光电信息有限公司 | More group's camera lenses and camera module |
| CN110275261A (en) * | 2018-03-16 | 2019-09-24 | 宁波舜宇光电信息有限公司 | Optical lens, camera module and its assemble method |
| CN214845971U (en) * | 2021-04-29 | 2021-11-23 | 南昌欧菲光电技术有限公司 | Optical lens, camera module and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117014713A (en) * | 2023-09-26 | 2023-11-07 | 荣耀终端有限公司 | Camera module and electronic equipment |
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