CN110275263B - Optical lens, camera module and assembling method thereof - Google Patents

Optical lens, camera module and assembling method thereof Download PDF

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Publication number
CN110275263B
CN110275263B CN201810220657.7A CN201810220657A CN110275263B CN 110275263 B CN110275263 B CN 110275263B CN 201810220657 A CN201810220657 A CN 201810220657A CN 110275263 B CN110275263 B CN 110275263B
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China
Prior art keywords
lens
optical
gap
component
adhesive
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CN201810220657.7A
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CN110275263A (en
Inventor
刘林
蒋恒
褚水佳
周凯伦
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Ningbo Sunny Opotech Co Ltd
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Ningbo Sunny Opotech Co Ltd
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Priority to CN201810220657.7A priority Critical patent/CN110275263B/en
Priority to PCT/CN2019/078478 priority patent/WO2019174645A1/en
Priority to US16/979,688 priority patent/US11899268B2/en
Priority to EP19766724.9A priority patent/EP3767358A4/en
Publication of CN110275263A publication Critical patent/CN110275263A/en
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Publication of CN110275263B publication Critical patent/CN110275263B/en
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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
    • 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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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)

Abstract

The present invention provides an optical lens comprising: a first lens part including at least one first lens and a light shielding part located at the top and side surfaces of a non-optical area of the at least one first lens; a second lens component including a second barrel and at least one second lens located within the second barrel, and at least one first lens and the at least one second lens together constituting an imageable optical system; and a glue material bonding the first lens component and the second lens component together, and the glue material is between the first lens and the second lens component. The invention also provides a corresponding optical lens assembly method, an image pickup module and an assembly method thereof. The invention can improve the stability of the optical system and the imaging quality of the optical lens or the camera module.

Description

Optical lens, camera module and assembling method thereof
Technical Field
The invention relates to the technical field of optical imaging, in particular to an optical lens, an imaging module and an assembling method thereof.
Background
With the popularity of mobile electronic devices, related technologies of camera modules for helping users acquire images (such as video or images) applied to mobile electronic devices have been rapidly developed and advanced, and in recent years, camera modules have been widely used in various fields such as medical treatment, security, industrial production, etc.
In order to meet the increasingly wide market demands, the high-pixel, small-size and large-aperture camera module is an irreversible development trend of the existing camera module. Currently, the market is providing an increasing demand for the imaging quality of camera modules. Factors affecting the resolution of a camera module for a given optical design include the quality of the optical imaging lens and manufacturing errors during the module packaging process.
Specifically, in the manufacturing process of the optical imaging lens, factors affecting the resolution of the lens come from errors in the assembly of the elements, errors in the thickness of the lens spacing elements, errors in the assembly fit of the lenses, variations in the refractive index of the lens material, and the like. The errors of each element and the assembly thereof comprise errors such as the thickness of the optical surface of each lens unit, the sagittal height of the optical surface of the lens, the surface of the optical surface, the radius of curvature, the single surface and the decentration between the surfaces of the lens, the inclination of the optical surface of the lens and the like, and the size of the errors depends on the control capability of the mold precision and the molding precision. The error in the thickness of the lens spacing element depends on the accuracy of the machining of the element. The error in the fitting of the lenses depends on the dimensional tolerance of the components to be fitted and the fitting accuracy of the lenses. The errors introduced by the change in refractive index of the lens material depend on the stability of the material and the lot consistency.
The error of each element affecting the resolution is accumulated and deteriorated, and the accumulated error is increased with the increase of the number of lenses. The existing solution is to compensate for the tolerance control and lens rotation of the element with high relative sensitivity to improve the resolution, but because the lens with high pixel and large aperture is sensitive, the tolerance is strict, such as: partial sensitive lens 1um lens eccentricity can bring 9' image plane inclination, leads to lens processing and assembly difficulty to be greater and greater, simultaneously, because feedback period is long in the assembly process, causes the process capability index (CPK) of lens assembly to be low, undulant big, leads to the defective rate to be high. Moreover, as described above, since there are many factors affecting the resolution of the lens, there is a limit to the manufacturing accuracy in the control of each factor, if only the accuracy of each element is simply improved, the improvement capability is limited, the improvement cost is high, and the imaging quality requirement of the market increasing day by day cannot be satisfied.
On the other hand, in the processing procedure of the camera module, the assembly process (such as the mounting of the photosensitive chip and the locking process of the motor lens) of each structural member may lead to the inclination of the photosensitive chip, and the superposition of multiple inclinations may lead to the failure of the resolution of the imaging module to reach the predetermined specification, thereby resulting in low yield of the module factory. In recent years, a module factory compensates for the inclination of a photosensitive chip by an active calibration (ACTIVE ALIGNMENT) process when assembling an imaging lens and a photosensitive module. However, this process has limited compensation capability. Because of the capability of the optical system (especially the optical imaging lens) to influence the resolution, when the resolution of the optical imaging lens is insufficient, the existing active calibration process of the photosensitive module is difficult to compensate.
In order to overcome the above-mentioned drawbacks, the present inventors have proposed an assembly method for adjusting and determining the relative positions of the upper and lower sub-lenses based on an active calibration process, and then bonding the upper and lower sub-lenses together according to the determined relative positions, thereby manufacturing a complete optical lens or camera module. The solution can improve the process capability index (CPK) of mass-produced optical lenses or camera modules; the requirements on the precision of each element of materials (such as a sub-lens or a photosensitive assembly for assembling an optical lens or an imaging module) and the assembly precision thereof can be widened and loosened, so that the overall cost of the optical imaging lens and the imaging module is reduced; various aberrations of the camera module can be corrected in real time in the assembly process, the reject ratio is reduced, the production cost is reduced, and the imaging quality is improved. However, active calibration and bonding based on the upper and lower sub-lenses are a brand new production process, and challenges are still faced to realize stable and reliable mass production based on the production process. For example, there are assembly tolerances between the lens and barrel of the upper sub-lens, which may introduce manufacturing tolerances to the optical lens manufactured based on the active calibration process. Specifically, fig. 1 shows a schematic partial cross-sectional view of one example of an optical lens manufactured based on an active calibration process in an ideal case where an upper sub-lens has no assembly tolerance, in which the lens barrel of the upper sub-lens is directly connected with the lens barrel of a lower sub-lens and plays a supporting role. The upper sub-lens comprises an upper lens barrel 11 and an upper lens 12, and the upper lens barrel 11 and the upper lens 12 are tightly attached to each other, which belongs to the ideal situation without assembly tolerance. The lower sub-lens includes a lower barrel 11 and a lower lens 12. When the upper and lower sub-lenses are bonded together by the adhesive 40, the adhesive may have a very thin thickness. Fig. 2 shows a schematic partial cross-sectional view of one example of an optical lens manufactured based on an active calibration process in the actual case of an upper sub-lens with assembly tolerances. Referring to fig. 2, in the upper sub-lens, the upper surface of the upper lens 12 is not tightly attached to the upper lens barrel 11, and there is a gap 50 between the two due to assembly tolerance, which increases the filling space of the adhesive 40 between the upper sub-lens and the lower sub-lens after active calibration, not only affecting the adhesive coating, but also increasing the thickness of the adhesive layer relative to the ideal case shown in fig. 1. And the thicker the glue, the greater the amount of variation it may cause. Specifically, the lens barrel of the upper sub-lens and the lower sub-lens are bonded by using the adhesive, and in the curing deformation process of the adhesive, the adhesive can form acting force on the lens barrel, and the acting force can cause the lens barrel to deform undesirably, so that the position of the lens installed in the lens barrel is changed. And the thicker the glue, the greater the above-mentioned undesired deformation. This results in deviations between the actual lens position of the optical system after the glue is fully cured and the lens position of the optical system determined by active calibration, which in turn leads to an unexpected imaging quality.
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 optical lens comprising: a first lens part including at least one first lens and a light shielding part located at the top and side surfaces of a non-optical area of the at least one first lens; a second lens component including a second barrel and at least one second lens located within the second barrel, and at least one first lens and the at least one second lens together constituting an imageable optical system; and a glue material bonding the first lens component and the second lens component together, and the glue material is between the first lens and the second lens component.
In one embodiment, the axis of the one first lens closest to the second lens component and the axis of the one second lens closest to the first lens component have an angle therebetween that is not zero.
In one embodiment, the light shielding portion is a first lens barrel, and the at least one first lens is mounted in the first lens barrel.
In one embodiment, the adhesive is interposed between one of the at least one first lens closest to the second lens part and an end face of the second barrel.
In one embodiment, the adhesive is interposed between the non-optical surface of one of the first lenses closest to the second lens part and the end surface of the second barrel.
In one embodiment, the adhesive comprises a first adhesive and a second adhesive, the second adhesive is interposed between one of the at least one first lens closest to the second lens component and one of the at least one second lens closest to the first lens component, and the second adhesive provides an adhesive force greater than the adhesive force provided by the first adhesive.
In one embodiment, the first lens component and the second lens component have a first gap and a second gap therebetween, the first adhesive and the second adhesive are coated on the first gap and the second gap, respectively, and the first gap is closer to the outer side of the optical lens than the second gap.
In one embodiment, the top surface of the second barrel includes a second planar surface, and the first gap and the second gap are both located between the second planar surface and the bottom surface of the non-optical zone of the first lens.
In one embodiment, the first gap is located between the one first lens closest to the second lens component and the end face of the second barrel; and the second gap is located between the one first lens closest to the second lens component and the one second lens closest to the first lens component.
In one embodiment, the non-optical surface of one of the at least one first lens closest to the second lens component has a roughened surface.
In one embodiment, the non-optical surface of one of the at least one second lens closest to the first lens component has a roughened surface.
In one embodiment, the glue is used to support and fix the first and second lens parts such that the relative positions of the first and second lens parts remain in the relative positions determined by active calibration.
In one embodiment, the first glue is a glue that is cured by light.
In one embodiment, the second glue is a glue that is cured by heat, moisture, anaerobic or oxidation.
In one embodiment, the first glue material is a UV glue or a UV thermosetting glue.
In one embodiment, the second glue material is a thermosetting glue or a UV thermosetting glue.
In one embodiment, the first glue material and the second glue material are the same material when in a liquid state, and the first glue material and the second glue material form different materials with different microstructures after curing, so that the adhesive force provided by the second glue material after curing is greater than the adhesive force provided by the first glue material after curing.
In one embodiment, the first and second glue materials are both UV thermosetting glue.
In one embodiment, the first and second glue materials do not contact each other.
In one embodiment, the first gap has a dimension of 30-100 μm in a direction along the optical axis of the optical lens.
In one embodiment, the second gap has a dimension of 30-100 μm in a direction along the optical axis of the optical lens.
In one embodiment, the second gap differs from the first gap in size along the optical axis of the optical lens by less than a threshold.
In one embodiment, the second gap has a second opening toward an optical axis of the optical lens, a size of the second opening in a direction along the optical axis being larger than an average size of the second gap.
In one embodiment, the first gap has a first opening toward an outside of the optical lens, a size of the first opening being larger than an average size of the first gap in a direction along the optical axis.
In one embodiment, the first lens is closer to the front end of the optical lens than the second lens.
In one embodiment, the one first lens closest to the second lens component has a first boss protruding toward the second lens component, and the second gap is located between the first boss and the non-optical face of the one second lens closest to the first lens component.
In one embodiment, the non-optical surface of a second lens closest to the first lens component has a first groove, and the second gap is located between the first boss and the first groove.
In one embodiment, the first boss is annular in a bottom view and the first recess is annular in a top view.
In one embodiment, the first lens closest to the second lens component has a plurality of first bosses protruding toward the second lens component, and the plurality of first bosses are distributed on a circle in a bottom view; and an end surface of the second lens component has a plurality of first grooves for accommodating the plurality of first bosses, and the second gap is located between the plurality of first bosses and the plurality of first grooves.
In one embodiment, the side walls of the first grooves are formed by the second barrel, and the bottom surfaces of the first grooves are formed by the non-optical surface of the second lens closest to the first lens part.
In one embodiment, the end face of the second lens barrel has a second boss facing the first lens part, and the non-optical face of one of the first lenses closest to the second lens part has a second groove, the second gap being located between the second boss and the second groove.
According to another aspect of the present invention, there is also provided an image capturing module including the aforementioned optical lens.
According to still another aspect of the present invention, there is also provided an optical lens assembly method including: preparing a first lens part including at least one first lens and maintaining a relative position between each other fixed by being fitted to each other when the number of the first lenses is plural, and a second lens part including a second lens barrel and at least one second lens located within the second lens barrel; pre-positioning the first lens component and the second lens component such that the at least one second lens and the at least one first lens together form an imageable optical system; adjusting and determining the relative positions of the first lens component and the second lens component based on active calibration; and bonding the first lens component and the second lens component through a glue material, wherein the glue material is arranged between the first lens and the second lens component.
In one embodiment, the active calibration includes: the first lens is ingested and moved to adjust and determine the relative position of the first lens and the second lens component.
In one embodiment, the active calibration further comprises: and adjusting and determining an included angle of the axis of the first lens relative to the axis of the second lens according to the real measured resolution force of the optical system.
In one embodiment, the active calibration further comprises: moving the first lens along a plane, determining a relative position between the first lens and the second lens component in a moving direction along the plane according to an actual measured resolving power of the optical system; movement along the plane includes translation and/or rotation in the plane.
In one embodiment, the active calibration further comprises: the first lens is moved in a direction perpendicular to the plane, and a relative position between the first lens and the second lens component in the moving direction perpendicular to the plane is determined based on the measured resolving power of the optical system.
In one embodiment, the bonding by the adhesive material comprises: the at least one first lens and the second lens component are supported with a cured glue material to maintain the relative positions of the first lens component and the second lens component in a relative position determined by active calibration.
In one embodiment, said pre-positioning said first lens part and said second lens part further comprises: forming a first gap and a second gap between the first lens component and the second lens component, wherein the first gap is closer to the outer side of the optical lens than the second gap; the bonding by the adhesive material comprises the following steps: coating a first adhesive material and a second adhesive material on the first gap and the second gap respectively, wherein the adhesive force of the second adhesive material is larger than that of the first adhesive material; solidifying the first adhesive to pre-fix the first lens component and the second lens component; and curing the second adhesive to permanently bond the first lens component and the second lens component.
In one embodiment, in the step of performing the predetermined positioning on the first lens component and the second lens component, the first gap formed is located between a non-optical surface of one of the at least one first lens closest to the second lens component and an end surface of the second barrel; and the second gap is formed between the one first lens closest to the second lens component and the one second lens closest to the first lens component.
In one embodiment, in the step of bonding by the adhesive, the first adhesive is a UV adhesive or a UV thermosetting adhesive, and the second adhesive is a thermosetting adhesive or a UV thermosetting adhesive.
According to still another aspect of the present invention, there is also provided an assembling method of an image capturing module, including: assembling an optical lens by using the optical lens assembling method; and manufacturing the image pickup module by using the assembled optical lens.
According to still another aspect of the present invention, there is also provided an assembling method of an image capturing module, including: preparing a first lens unit and an image pickup module unit, wherein the image pickup module unit includes a second lens unit and a photosensitive module that are combined together, and the first lens unit includes at least one first lens, and when the number of the first lenses is plural, the first lenses are held fixed relative to each other by being fitted to each other, and the second lens unit includes a second lens barrel and at least one second lens located within the second lens barrel; pre-positioning the first lens component and the second lens component such that the at least one second lens and the at least one first lens together form an imageable optical system; adjusting and determining the relative positions of the first lens component and the second lens component based on active calibration; and bonding the first lens component and the second lens component through a glue material, wherein the glue material is arranged between the first lens and the second lens component.
Compared with the prior art, the invention has at least one of the following technical effects:
1. the invention can avoid the lens position deviation caused by the deformation of the lens barrel.
2. The invention can directly bond the lower lens part by using the lens of the upper lens part to provide all bonding force, thereby avoiding the influence of lens barrel variation in the lens part on the lens.
3. The invention can directly connect the upper lens part and the lower lens part, thereby reducing the manufacturing tolerance of the optical lens or the camera module caused by the assembly tolerance between the upper lens part and the lens barrel.
4. The invention can directly connect the upper lens part and the lower lens part, thereby reducing the variation of the upper lens part caused by the thermal expansion coefficients of the lens barrel and the lens.
5. The invention can improve the stability of the optical system and the imaging quality of the camera module.
6. The invention is beneficial to improving the yield of manufacturing the optical lens or the camera module based on active calibration.
Drawings
Exemplary embodiments are illustrated in referenced figures. The embodiments and figures disclosed herein are to be regarded as illustrative rather than restrictive.
FIG. 1 illustrates a partial cross-sectional schematic view of one example of an optical lens manufactured based on an active calibration process, with no assembly tolerances for the upper sub-lens;
FIG. 2 illustrates a partial cross-sectional schematic view of one example of an optical lens manufactured based on an active calibration process in the actual case of an upper sub-lens with assembly tolerances;
FIG. 3 is a schematic cross-sectional view of an imaging module 1000 according to an embodiment of the present invention;
FIG. 4 illustrates an enlarged partial cross-sectional view of the bonding area of the first lens component 100 and the second lens component 200 in one embodiment of the invention;
Fig. 5 is a partially enlarged cross-sectional view showing a bonding area of the first lens part 100 and the second lens part 200 in another embodiment of the present invention;
Fig. 6 is a partially enlarged cross-sectional view showing a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention;
Fig. 7 is a partially enlarged cross-sectional view showing a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention;
FIG. 8 shows a schematic top view of the second lens component 200 of the embodiment of FIG. 7;
Fig. 9 is a partially enlarged cross-sectional view showing a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention;
FIG. 10 is a flow chart illustrating a method of assembling an optical lens in one embodiment of the invention;
FIG. 11 shows a flow chart of step 40 in one embodiment of the invention;
FIG. 12 is a flowchart of an assembly method of camera modules according to another embodiment of the present invention;
fig. 13 is a partially enlarged cross-sectional view showing a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention;
FIG. 14a is a schematic cross-sectional view of a first lens and a second lens element according to an embodiment of the present invention after being pre-positioned;
FIG. 14b is a schematic cross-sectional view showing the positional relationship of the first lens element and the second lens element after active alignment according to one embodiment of the present invention;
FIG. 14c shows an enlarged schematic view of a partial region in FIG. 14 a;
FIG. 14d shows an enlarged schematic view of a partial region in FIG. 14 b;
FIG. 14e is an enlarged view showing a partial area of the dispensing position of the adhesive material between the first lens and the second lens barrel added on the basis of FIG. 14 d;
FIG. 15a illustrates a relative position adjustment scheme in active calibration in one embodiment of the invention;
FIG. 15b illustrates rotational adjustment in active calibration in accordance with another embodiment of the present invention;
fig. 15c shows a relative position adjustment with increased v, w direction adjustment in active calibration according to yet another embodiment of the invention.
Detailed Description
For a better understanding of the application, various aspects of the 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 application and is not intended to limit the scope of the 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 in this specification, the expressions first, second, etc. are only used to distinguish one feature from another feature, and do not represent any limitation of the feature. 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 the object have been slightly exaggerated for convenience of explanation. The figures are merely examples and are not drawn to scale.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," 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. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the present application, the use of "may" means "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 table-like terms, not as table-level terms, and are intended to illustrate inherent deviations in measured or calculated values that will be recognized by one 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, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 3 shows a schematic cross-sectional view of an imaging module 1000 according to an embodiment of the invention. The camera module 1000 includes an optical lens and a photosensitive assembly 300. The optical lens comprises a first lens component 100, a second lens component 200 and a glue material 400 for bonding the first lens component 100 and the second lens component 200 together. The first lens component 100 includes a first lens barrel 101 and one first lens 102, and the second lens component 200 includes a second lens barrel 201 and five second lenses 202. In the present embodiment, the first lens barrel 101 plays a role of shielding light, and does not have a function of supporting the first lens 102. In other words, the first barrel 101 can be understood as a light shielding portion attached to the first lens 102. Referring to fig. 3, the first lens barrel 101 surrounds the side surfaces of the first lens 101, specifically, the first lens 102 includes an optical region 102a and a non-optical region 102b, and the first lens barrel 101 is attached to the side surfaces and the top surface of the non-optical region 102b to play a light shielding role for the optical region 102 a. In the present embodiment, since the first barrel 101 is not required to function as a support for the first lens 102, the thickness of the first barrel 101 can be reduced. For example, the thickness of the wall of the first barrel 101 may be smaller than the thickness of the wall required to support the first lens 102. This will help reduce the volume of the optical lens or camera module. In the present embodiment, the first lens 102 is directly bonded to the second lens barrel 102. Since the first lens 102 is directly bonded to the second lens barrel 102, the gap 50 as shown in fig. 2 does not cause the thickness of the adhesive 400 between the first lens part 100 and the second lens part 200 to become thick. In this way, in the manufacture of an optical lens based on active calibration, the additional manufacturing tolerances due to the assembly tolerances of the first lens and the first barrel shown in fig. 2 can be avoided.
Further, still referring to fig. 3, in one embodiment, the second lens part 200 may further include a motor 203, and the second lens barrel 202 may be mounted in a carrier of the motor 203 (an internal structure of the motor is not shown in fig. 1). The photosensitive assembly 300 includes a wiring board 301, a photosensitive chip 302 mounted on the wiring board 301, a cylindrical support 303 mounted on the wiring board 301 and surrounding the photosensitive chip, and a color filter 304 mounted on the cylindrical support 303. The motor 203 is mounted on the top surface of the cylindrical support 303 to fix the second lens member 200 and the photosensitive assembly 300 together. It should be noted that in other embodiments of the present invention, the motor 203 in fig. 1 may be replaced by other structures such as a cylindrical support, or the motor 203 in fig. 1 may be omitted and the second barrel 201 may be directly mounted on the top surface of the cylindrical support 303. It should be noted that in other embodiments the motor 203 may be replaced by other types of optical actuators, such as SMA (shape memory alloy) actuators. Wherein the optical actuator refers to a device for causing the optical lens to move relative to the photosensitive chip.
Further, fig. 4 shows a partially enlarged cross-sectional view of the bonding area of the first lens part 100 and the second lens part 200 in one embodiment of the present invention. Referring to fig. 4, in the present embodiment, a gap (labeled "①" in fig. 4) is provided between the first lens part 100 and the second lens part 200. Specifically, the gap is located between the end face (non-optical face) of the non-optical area of the first lens 102 and the second barrel 202. The surface of the non-optical surface of the first lens 102 may be roughened to increase the roughness thereof, thereby increasing the adhesion between the second adhesive and the surface of the non-optical surface. When the first lens component 100 and the second lens component 200 are assembled, the relative positions of the first lens component 100 and the second lens component 200 can be actively calibrated, then the glue (for example, UV thermosetting glue) is dispensed at the gap between the first lens 102 and the second lens component 200 of the first lens component 100, the glue 400 is not adhered to the first lens barrel 101 during dispensing, then UV exposure is performed, and the part of the glue 400 which can receive light relatively outside is cured to pre-fix the structure of the camera module or the optical lens. And finally, baking, curing all the glue, and fixing the whole camera module or the optical lens. Of course, in another embodiment, the order of dispensing and active calibration may be interchanged.
Referring to fig. 4, in one embodiment, in order to enable the glue to be exposed and cured as much as possible, the wall of the first barrel 101 of the first lens part 100 is thinned as much as possible. Further, in another embodiment, the first lens component may be formed by only one lens with a shading treatment, where the shading treatment of the lens may avoid the influence of stray light on imaging). The embodiment shown in fig. 13 will be described further below.
Further still referring to fig. 4, in one embodiment, the second barrel 201 may be provided with a chamfer to form the gap into an opening 401b toward the outside, the chamfer serving to channel glue that may overflow, preventing the first barrel 101 of the first lens part 100 from being stained with glue. The second barrel 201 may also be chamfered so that the gap forms an opening 401a towards the optical axis of the optical lens, thereby guiding glue that may overflow, avoiding contamination of the lens by glue. The dimensions of both openings 401a, 401b in the direction along the optical axis are larger than the average size of the gap.
In the above embodiment, the first lens 102 is closer to the front end of the optical lens than the second lens 202 (the front end of the optical lens refers to the light incident end, and the rear end refers to the end close to the photosensitive element).
Further, fig. 5 shows a partially enlarged cross-sectional view of a bonding area of the first lens part 100 and the second lens part 200 in another embodiment of the present invention. The first lens part 100 and the second lens part 200 in this embodiment have a first gap and a second gap therebetween. The positions of the first gap and the second gap are labeled in fig. 5 with "①" and "②", respectively. The adhesive material comprises a first adhesive material and a second adhesive material, wherein the first adhesive material and the second adhesive material are respectively coated on the first gap and the second gap, and the first gap is closer to the outer side of the optical lens than the second gap (namely, the second gap is closer to the optical axis of the optical lens than the first gap). And, a second adhesive is interposed between the first lens 102 and the second lens 202, the second adhesive providing an adhesive force greater than the adhesive force provided by the first adhesive. Referring to fig. 2, the first gap is located between the non-optical surface 111 of the first lens 102 and the end surface 211 of the second barrel 201. The second gap is located between the non-optical face 112 of the first lens 101 and the non-optical face 212 of one of the second lenses 202 closest to the first lens component 100. The non-optical face 112 of the first lens 101 may be formed to protrude toward the first boss 112a of the second lens part 200 such that the second gap is located between the first boss 112a and the non-optical face 212 of the second lens 202. The first boss 112a may have a ring shape in a bottom view. The cross-sectional shape of the first boss 112a is not limited, and for example, the cross-sectional shape thereof may be a trapezoid, a rectangle, or the like.
In one embodiment, in order to enable the glue to be exposed and cured as much as possible, the wall of the first barrel 101 of the first lens unit 100 is as thin as possible (for example, the wall thickness of the first barrel 101 may be smaller than the wall thickness required for rigidly supporting the first lens 102), and even the first lens unit may be formed by only one lens subjected to a shading treatment (the shading treatment of the lens prevents stray light from affecting imaging). Herein, the non-optical face of a lens is the surface of the portion of the lens that does not participate in optical imaging. The portion of the lens that does not participate in optical imaging may be referred to as the non-optical zone, sometimes referred to as the inactive zone. In this embodiment, the non-optical zone of the lens may act as a support. In this embodiment, the adhesive (including the first adhesive and the second adhesive) is used to support the first lens component 100 and the second lens component 200, so that the relative positions of the first lens component 100 and the second lens component 200 are maintained at the relative positions determined by active calibration. Wherein the first adhesive material can be used for pre-fixing, and the second adhesive material is used for permanent fixing. In one embodiment, the first glue material is a UV glue, which can be cured by exposure to light. The second glue material is thermosetting glue, and the thermosetting glue can be cured by baking the lens or the module. In this embodiment, the surface of the non-optical surface 212 of the second lens 202 coated with the second adhesive may be roughened to increase the roughness thereof, thereby increasing the adhesion between the second adhesive and the surface of the non-optical surface 212. The surface of the non-optical surfaces 111, 112 of the first lens element 102 may also be roughened to increase the roughness thereof, thereby increasing the adhesion between the second adhesive and the surface of the non-optical surfaces.
Further, fig. 6 is a partially enlarged cross-sectional view showing a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention. This embodiment is substantially identical to the embodiment shown in fig. 5, except that the non-optical surface 212 of the second lens 202 defines a first recess 212a, and the second gap is located between the first land 112a and the first recess 212 a. The first boss 112a is annular in bottom view, and the first recess 212a is annular in top view. The first groove corresponding to the first boss is arranged to prevent glue from overflowing to pollute the lens.
Further, fig. 7 shows a partially enlarged cross-sectional view of a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention. Fig. 8 shows a schematic top view of the second lens component 200 of the embodiment of fig. 7. Referring to fig. 7 and 8, in the present embodiment, the first lens 102 has a plurality of first bosses 112b protruding toward the second lens part 200, the end face 213 of the second lens part 200 has a plurality of first grooves 213b for accommodating the plurality of first bosses 112b, and the second gap is located between the plurality of first bosses 112b and the plurality of first grooves 213 b. In a top view (refer to fig. 8), the plurality of first grooves 213b are distributed on a circle. Accordingly, the plurality of first bosses 112b are also distributed on a circle in the bottom view. In this embodiment, the second glue may be applied to the bottom of the first groove 213b, so as to prevent the glue from overflowing and contaminating the lens. Further, the solution of the present embodiment also increases the contact area of the first lens part 100 and the second lens part 200, thereby increasing the connection strength of the first lens part 100 and the second lens part 200.
Still referring to fig. 7, in one embodiment, the side walls of the plurality of first grooves 213b are formed by the second barrel 201, and the bottom surfaces of the plurality of first grooves 213b are formed by the non-optical surface 212 of one of the second lenses 202 closest to the first lens part.
Further, fig. 9 shows a partially enlarged cross-sectional view of a bonding area of the first lens part 100 and the second lens part 200 in still another embodiment of the present invention. In this embodiment, there is a first gap and a second gap between the first lens component 100 and the second lens component 200 in this embodiment. The adhesive comprises a first adhesive and a second adhesive, wherein the first adhesive and the second adhesive are respectively coated on the first gap and the second gap, and the first gap is closer to the outer side of the optical lens than the second gap (namely, the second gap is closer to the optical axis of the optical lens than the first gap). The second adhesive material provides an adhesive force greater than that provided by the first adhesive material. The end surface of the second barrel 201 has a second boss 214a protruding toward the first lens part 100, and the non-optical surface of the first lens 102 has a second groove 114a, and the second gap is located between the second boss 214a and the second groove 114 a. The first gap is located between the non-optical surface 111 of the first lens 102 and the end surface 211 of the second lens barrel 201. The second boss 214a may have a ring shape in a top view. The cross-sectional shape of the second boss 214a is not limited, and may be, for example, a trapezoid, a rectangle, or the like. The second groove 114a may have a ring shape in a bottom view. In order to enable the glue to be exposed and cured as much as possible, the wall of the first barrel 101 of the first lens component 100 is as thin as possible (for example, the wall thickness of the first barrel 101 may be smaller than the wall thickness required for rigidly supporting the first lens 102), and even the first lens component may be formed by only one lens subjected to a shading treatment (wherein the shading treatment of the lens prevents stray light from affecting imaging).
Still referring to fig. 9, in one embodiment, the second gap has a second opening 402 toward the optical axis of the optical lens, the second opening 402 having a size greater than an average size of the second gap in a direction along the optical axis. The first gap has a first opening 401 toward the outside of the optical lens, and a size of the first opening 401 in a direction along the optical axis is larger than an average size of the first gap. The design of the first opening 401 and the second opening 402 can effectively drain overflowed glue, and avoid the optical area of the lens barrel or the lens from being polluted. The first opening 401 and the second opening 402 may each be formed by chamfering the end face of the second mirror cylinder 201.
Further, fig. 13 is a partially enlarged cross-sectional view showing a bonding area of the first lens part 100 'and the second lens part 200' in still another embodiment of the present invention. In this embodiment, the first lens component may be composed of only one lens subjected to light shielding treatment. Wherein the lens shading treatment can avoid the influence of stray light on imaging. Referring to fig. 13, the first lens part 100 'includes one first lens 102' and a light shielding portion 101 'attached to the first lens 102'. Wherein the first lens 102' includes an optical zone 1021' and a non-optical zone 1022' (also sometimes referred to as an inactive zone). Wherein optical zone 1021' is the area of the lens that participates in optical imaging. The light shielding portion 101 'is formed on the top and outer sides of the non-optical region 1022' to avoid the influence of stray light on imaging. The bottom surface of the non-optical region 1022' may be a first planar surface. The second lens part 200' includes at least one second lens 202' and a second barrel 201'. All of the second lenses 202 'are mounted inside the second barrel 201'. The top surface of the second barrel 201' includes a second flat surface. A first gap 410 'and a second gap 420' are formed between the first planar surface and the second planar surface. Wherein the first gap 410 'is closer to the outside of the optical lens than the second gap 420', i.e. the second gap 420 'is closer to the optical axis of the optical lens than the first gap 410'. The first glue material is UV glue, and the UV glue can be cured through exposure. The second glue material is thermosetting glue, and the thermosetting glue can be cured by baking the lens or the module. In this embodiment, the portion of the bottom surface of the non-optical region 1022 'of the first lens 102' that forms the second gap may be roughened to increase the roughness thereof, thereby increasing the adhesion with the second adhesive. The relative positions of the first lens component 100 'and the second lens component 200' can be kept at the relative positions determined by active calibration after the first adhesive and the second adhesive are cured. Since the light shielding portion 101 'is attached to the first lens 102', the first lens barrel is omitted, and the assembly tolerance of the first lens and the first lens barrel is avoided, so that the problem of secondary variation caused by thickening of the adhesive material (as shown in fig. 2) due to the assembly tolerance is avoided. On the other hand, during active calibration, the ingestion mechanism typically needs to grip (or adsorb) the lens components from the outside in order to adjust the relative positions of the first lens component and the second lens component. When the lens component has a lens barrel, the pickup mechanism grips (or adsorbs) the lens barrel to indirectly move the lens to achieve adjustment of the optical system. When there is an assembly tolerance of the first lens part (e.g., the upper sub-lens), undesirable mounting differences of the lens and the barrel (i.e., differences in the relative positions of the lens and the barrel) occur, which may cause unstable dimensions of the gap between the first lens part and the second lens part during mass production, and thus, active calibration is inconvenient. While the embodiment of fig. 13 can avoid this problem.
Further, in the foregoing embodiment, the first adhesive material and the second adhesive material are UV adhesive and thermosetting adhesive, respectively. Generally, the thermosetting adhesive can provide an adhesive force greater than that of the UV adhesive after being cured, so that the adhesive force provided by the second adhesive material is greater than that provided by the first adhesive material. The UV glue is applied to a first gap on the outside (i.e. the side farther from the optical axis) and the thermosetting glue is applied to a second gap on the inside (i.e. the side closer to the optical axis). The UV glue is cured by direct irradiation of light to pre-fix the relative positions of the first lens part and the second lens part as determined by active calibration. And then heating the pre-fixed optical lens to solidify the thermosetting adhesive at the second gap, thereby enhancing the structural strength of the optical lens and improving the reliability of the optical lens.
It should be noted that in other embodiments, the first adhesive may be another adhesive cured by light (e.g., may be a UV thermosetting adhesive). The second glue may also be other glue that is cured by heat, moisture, anaerobic or oxidation.
In another embodiment, the first and second glue materials may be the same material when in a liquid state, for example, the first and second glue materials may each be UV thermosetting glue. However, the UV thermosetting adhesives located in the first gap and the second gap are cured in different manners (for example, the UV thermosetting adhesive in the first gap may be directly irradiated with light to complete photo-curing, and then the UV thermosetting adhesive in the second gap is thermally cured), so that different materials with different microstructure are formed after curing, so that the adhesive force provided by the second adhesive material after curing is greater than the adhesive force provided by the first adhesive material after curing. The microstructure may be, for example, a molecular structure, a micron-sized physical form, a molecular proportion, a lattice form, or the like.
Further, in an embodiment, the first glue material and the second glue material may not contact each other, so as to avoid chemical changes generated after the first glue material and the second glue material are mixed, and affect the glue characteristics. The embodiment can further enhance the reliability of the optical lens or the camera module because chemical changes generated after the first adhesive and the second adhesive are mixed are avoided.
Further, in one embodiment, the first gap has a dimension of 30-100 μm in a direction along the optical axis of the optical lens.
Further, in one embodiment, the second gap has a dimension of 30-100 μm in a direction along the optical axis of the optical lens.
Further, when the first and second adhesive materials use the same material in a liquid state (i.e., when not cured), the difference in size of the second gap from the first gap in the optical axis direction along the optical lens is smaller than a threshold value (the threshold value is smaller than 100 μm).
In the above embodiment, the number of lenses of the first lens part and the second lens part may be adjusted as needed. For example, the number of lenses of the first lens component and the second lens component may be two and four, or three and three, or four and two, or five and one, respectively. The total number of lenses of the whole optical lens can be adjusted as required, for example, the total number of lenses of the optical lens can be six, or can be five or seven. In particular, in a preferred embodiment, when the first lens component has a plurality of first lenses, the first lenses are held fixed in position relative to each other by being fitted to each other. In other words, the plurality of first lenses of the first lens part do not require the first barrel to provide a supporting function, and the structural stability of the optical system of the first lens part can be maintained. In addition, when the first lens component and the second lens component are bonded by the adhesive, the first lens in each of the embodiments described above (only a single first lens in these embodiments) may be replaced by one of the first lenses closest to the second lens component, among the plurality of first lenses that are mutually engaged. That is, the shape and structure of the first lens in fig. 3 to 8 can be used for one of the plurality of first lenses that is closest to the second lens part to be fitted to each other, thereby achieving a similar function.
Further, fig. 10 shows a flowchart of an optical lens assembly method in an embodiment of the invention. Referring to fig. 10, the method includes:
Step10, preparing a first lens component and a second lens component, wherein the first lens component comprises at least one first lens, and when the number of the first lenses is a plurality of the first lenses, the first lenses are mutually embedded to keep fixed relative positions of the first lenses and the second lens component comprises a second lens barrel and at least one second lens positioned in the second lens barrel.
Step 20, pre-positioning the first lens component and the second lens component such that the at least one second lens and the at least one first lens together form an imageable optical system.
Step 30, adjusting and determining the relative position of the first lens component and the second lens component based on the active calibration.
Step 40, bonding the first lens component and the second lens component through a glue material, wherein the glue material is arranged between the first lens and the second lens component. In this step, the first lens component and the second lens component are supported with a cured adhesive material so that the relative positions of the first lens component and the second lens component are maintained at the relative positions determined by active calibration.
Further, in one embodiment, before step 30 is performed, a glue coating may be performed on the gap between the first lens component and the second lens component, and then step 30 is performed to adjust and determine the relative positions of the first lens component and the second lens component. After the relative position is determined, step 40 is performed to cure the glue material, thereby supporting the first lens component and the second lens component with the cured glue material, and further maintaining the relative position of the first lens component and the second lens component at the relative position determined by active calibration. In yet another embodiment, step 30 may be performed first to adjust and determine the relative positions of the first lens component and the second lens component. After determining the relative position, the first lens part (or the second lens part) is temporarily moved away, then glue is applied, and the first lens part (or the second lens part) is moved back based on the determined relative position. And finally, curing the adhesive material to enable the relative positions of the first lens component and the second lens component to be kept at the relative positions determined through active calibration.
Further, in one embodiment, in the step 30, a first gap and a second gap are formed between the first lens component and the second lens component, wherein the first gap is closer to an outer side of the optical lens than the second gap.
Further, FIG. 11 shows a flow chart of step 40 in one embodiment of the invention. Referring to fig. 11, the step 40 includes the sub-steps of:
Step 401, coating a first adhesive material and a second adhesive material on the first gap and the second gap, respectively, wherein the adhesive force of the second adhesive material is greater than that of the first adhesive material.
Step 402, curing the first adhesive to pre-fix the first lens component and the second lens component.
Step 403, curing the second adhesive material to permanently bond the first lens component and the second lens component. The first adhesive material can be UV adhesive, and the second adhesive material can be thermal curing adhesive.
In step 402, when the first lens barrel and the second lens are bonded by using the first adhesive, the adhesive curing deformation has a smaller acting force on the lens barrel, so as to reduce the deformation of the lens barrel. In step 403, since the first lens is directly adhered to the corresponding second lens component, the first gap and the second gap can be prevented from being increased due to the assembly tolerance of the first lens barrel and the first lens, and the thickness of the adhesive is prevented from being too large. If the thickness of the pectin material is too large, deformation generated when the pectin material is solidified can cause variation of the lens barrel, and further cause dislocation of the first lens or the second lens. Therefore, the present embodiment can avoid the change of the lens position caused by the deformation of the first lens barrel and/or the second lens barrel, thereby ensuring that the permanent relative position between the first lens and the second lens formed after curing is consistent with the relative position between the first lens component and the second lens component determined by active calibration, and further ensuring that the imaging quality reaches the expectations.
Further, in one embodiment, in the step of positioning the first lens component and the second lens component (step 30), the first gap formed is located between a non-optical surface of one of the at least one first lens closest to the second lens component and an end surface of the second barrel. And the second gap is formed between the one first lens closest to the second lens component and the one second lens closest to the first lens component.
In the foregoing embodiment, the first adhesive material and the second adhesive material are UV adhesive and thermosetting adhesive, respectively. Generally, the thermosetting adhesive can provide an adhesive force greater than that of the UV adhesive after being cured, so that the adhesive force provided by the second adhesive material is greater than that provided by the first adhesive material. The UV glue is applied to a first gap on the outside (i.e. the side farther from the optical axis) and the thermosetting glue is applied to a second gap on the inside (i.e. the side closer to the optical axis). The UV glue is cured by direct irradiation of light to pre-fix the relative positions of the first lens part and the second lens part as determined by active calibration. And then heating the pre-fixed optical lens to solidify the thermosetting adhesive at the second gap, thereby enhancing the structural strength of the optical lens and improving the reliability of the optical lens.
It should be noted that in other embodiments, the first adhesive may be another adhesive cured by light (e.g., may be a UV thermosetting adhesive). The second glue may also be other glue that is cured by heat, moisture, anaerobic or oxidation.
In another embodiment, the first and second glue materials may be the same material when in a liquid state, for example, the first and second glue materials may each be UV thermosetting glue. However, the UV thermosetting adhesives located in the first gap and the second gap are cured in different manners (for example, the UV thermosetting adhesive in the first gap may be directly irradiated with light to complete photo-curing, and then the UV thermosetting adhesive in the second gap is thermally cured), so that different materials with different microstructure are formed after curing, so that the adhesive force provided by the second adhesive material after curing is greater than the adhesive force provided by the first adhesive material after curing. The microstructure may be, for example, a molecular structure, a micron-sized physical form, a molecular proportion, a lattice form, or the like.
Further, in an embodiment, the first glue material and the second glue material may not contact each other, so as to avoid chemical changes generated after the first glue material and the second glue material are mixed, and affect the glue characteristics. The embodiment can further enhance the reliability of the optical lens or the camera module because chemical changes generated after the first adhesive and the second adhesive are mixed are avoided.
Further, in one embodiment, the first gap has a dimension of 30-100 μm in a direction along the optical axis of the optical lens.
Further, in one embodiment, the second gap has a dimension of 30-100 μm in a direction along the optical axis of the optical lens.
Further, when the first and second adhesive materials use the same material in a liquid state (i.e., when not cured), the difference in size of the second gap from the first gap in the optical axis direction along the optical lens is smaller than a threshold value (the threshold value is smaller than 100 μm).
Further, according to an embodiment of the present invention, there is also provided an image capturing module assembly method including: the optical lens is assembled by the optical lens assembling method according to any of the embodiments, and then the image pickup module is manufactured by the assembled optical lens.
Further, fig. 12 shows a flowchart of an assembling method of an image capturing module according to another embodiment of the present invention, the method includes:
Step 100, preparing a first lens component and an image pickup module component, wherein the image pickup module component comprises a second lens component and a photosensitive module which are combined together, wherein the first lens component comprises at least one first lens, and when the number of the first lenses is a plurality of the first lenses, the first lenses are mutually embedded to keep fixed relative positions of the first lenses, and the second lens component comprises a second lens barrel and at least one second lens positioned in the second lens barrel. In this step, in order to enable the glue to be exposed and cured as much as possible, the prepared first lens component may include a first lens barrel, where the wall of the first lens barrel is as thin as possible, and even the first lens component may be formed by only one first lens that is subjected to shading treatment (the shading treatment of the lens may avoid the influence of stray light on imaging).
Step 200, pre-positioning the first lens component and the second lens component such that the at least one second lens and the at least one first lens together form an imageable optical system.
Step 300, adjusting and determining the relative position of the first lens component and the second lens component based on the active calibration.
Step 400, bonding the first lens component and the second lens component through a glue material, wherein the glue material is arranged between the first lens and the second lens component.
It can be seen that, compared with the previous embodiment, the second lens component and the photosensitive module are assembled together to form the image capturing module component in this embodiment, and then the image capturing module component is assembled with the first lens component, so as to obtain the complete image capturing module. The process of assembling the image capturing module component with the first lens component may also have various modifications, for example, reference may be made to the embodiments of the optical lens assembly method described above to achieve the assembly of the image capturing module component with the first lens component.
Further, the active calibration described in the present application may adjust the relative positions of the first lens component and the second lens component in multiple degrees of freedom. FIG. 15a illustrates relative position adjustment in active calibration in one embodiment of the application. In this adjustment mode, the first lens part (which may also be a first lens) may be movable in x, y, z directions relative to the second lens part (i.e. the relative position adjustment in this embodiment has three degrees of freedom). Wherein the z-direction is a direction along the optical axis, and the x-y direction is a direction perpendicular to the optical axis. The x and y directions are both in an adjustment plane P in which translation can be resolved into two components in the x and y directions.
Fig. 15b shows rotational adjustment in active calibration of another embodiment of the present invention. In this embodiment, the relative position adjustment has an increased degree of rotational freedom, i.e. adjustment in the r-direction, in addition to the three degrees of freedom of fig. 3. In this embodiment, the adjustment in the r-direction is a rotation in the adjustment plane P, i.e. about an axis perpendicular to the adjustment plane P.
Further, fig. 15c shows a relative position adjustment manner with an addition of v, w direction adjustment in active calibration according to yet another embodiment of the present invention. Wherein the v-direction represents the rotation angle of the xoz plane, the w-direction represents the rotation angle of the yoz plane, and the rotation angles of the v-direction and the w-direction can be combined into a vector angle, which represents 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 (that is, 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 above-mentioned x, y, z, r, v, w adjustment of the six degrees of freedom 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 may be performed by a combination of any two or more of them.
Further, fig. 14 a-b illustrate an assembly process of an optical lens according to an embodiment of the present invention, including:
In step 1, the second lens component 200 is fixed by a fixing mechanism (not shown), and the first lens 102 of the first lens component 100 is clamped (or absorbed) by an intake mechanism (not shown) to perform a predetermined positioning, so that the first and second lens components 100 and 200 form an imageable optical system. Fig. 14a shows a schematic cross-sectional view of a first lens and a second lens part after pre-positioning according to an embodiment of the invention. Fig. 14c shows an enlarged schematic view of a partial region in fig. 14a, the enlarged portion being the region within the circle in fig. 14 a. Referring to fig. 14a and 14c, the first lens component 100 has at least one first bearing surface 102c, the second lens component 200 has at least one second bearing surface 201c, and at least one of the first bearing surface 102c and the at least one second bearing surface 201c form at least one gap between the first bearing surface and the second bearing surface. The first lens 102 in this embodiment serves both as a support and an optical power enhancement. The first bearing surface 102c is provided by a non-optical area of the first lens 102, and the second bearing surface 201c is preferably provided by the second barrel 201 in the present embodiment.
Step 2: the first lens component is actively adjusted relative to the second bearing surface of the second lens component through the shooting mechanism, the active adjustment comprises shooting a reference object, preferably a target plate, and acquiring a correction amount, preferably an MTF value, or an SFR or Tv Line value, from image information, and after acquiring a relevant correction amount, the shooting mechanism adjusts the positions of the first lens component and the second lens component to perfect the optical system, wherein the reference standard of a specific optical system comprises that the optical system after being finished has aberration reduction compared with an optical system without adjustment, the performance of improving the resolution is improved, and the perfect index of the optical system can also be set as required. The predetermined position is generally in compliance with the design dimensions of the gap as the first and second lens portions are predetermined as a starting step in the subsequent process flow. Fig. 14b is a schematic cross-sectional view showing the positional relationship of the first lens element and the second lens element after active alignment according to an embodiment of the present invention. Fig. 14d shows an enlarged schematic view of a partial region in fig. 14b, the enlarged portion being the region within the circle in fig. 14 b. Referring to fig. 14b and 14d, after active calibration, the angle between the axis of the first lens element 102 and the axis of the second lens element 200 may be different from zero, and the first bearing surface 102c and the second bearing surface 201c are not parallel.
In one embodiment, the second lens component is actively adjusted relative to the first bearing surface by the ingestion mechanism, and the active adjustment includes an adjustment of the first bearing surface and the second bearing surface relative to the X-axis and/or the Y-axis and/or the Z-axis, so that the relative positions of the first bearing surface and the second bearing surface change, and an included angle is formed between the first bearing surface and the second bearing surface, and in general, the magnitude of the included angle after the adjustment is inconsistent with the included angle in the pre-positioning. The angle changes the size of the gap at the predetermined position, and thus may cause an error in the adjusted gap from the designed gap size. As can be seen from the figure, referring to the actual test, the first lens component and the second lens component are assembled, so that the consistency of the optical systems of the first lens component and the second lens component is not high due to the error in production, and the adjustment is performed in comparison with the case of the pre-positioning change in step 1.
In another embodiment, the adjusting the relative position of the first lens 102 with respect to the second lens component 200 by the ingestion mechanism includes: by adjusting the angle of the axis of the first lens part relative to the axis of the second lens part, the first lens part is moved relative to the second lens part along an adjustment plane, and the first lens part is moved relative to the second lens part along a direction perpendicular to the adjustment plane, thereby improving the measured resolution (e.g., MTF value, SFR value, or Tv Line value) of the optical system imaging. Wherein said moving along the adjustment plane comprises translating and/or rotating on said adjustment plane. After active calibration, the angle between the axis of the first lens 102 and the axis of the second lens component 200 may be non-zero. The axis of the second lens part 200 may be represented by the axis of the second barrel 201 or the second lens 202.
Step 3: after the gap determined after adjustment is recorded, the uptake mechanism moves the first lens component 100 away from the second lens component to expose the second bearing surface 201c. The second bearing surface 201c is subjected to dispensing treatment, and then the first lens component 100 is returned to the recording position by the taking mechanism, and the adhesive is cured to support and fix the first lens component and the second lens component. Fig. 14e shows an enlarged schematic view of a partial area of the dispensing position of the adhesive material between the first lens and the second lens barrel added on the basis of fig. 14 d. The position of the dispensing in this step is indicated by "②". It should be noted that, since the lens barrel of the first lens component is omitted, the shading portion in the embodiment may be blacked out, so that the size of the first lens component may be reduced to a great extent, and the adhesive material is completely interposed between the first lens and the second lens component, so that a chain reaction that the lens barrel is driven by the adhesive variation, and the lens barrel is driven by the lens variation is avoided.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims (40)

1. An optical lens, comprising:
A first lens part including at least one first lens and a light shielding part attached to a top surface and a side surface of a non-optical area of the at least one first lens, wherein a thickness of the light shielding part is smaller than a thickness of a cylinder wall of a lens barrel required to support the at least one first lens;
a second lens component including a second barrel and at least one second lens located within the second barrel, and at least one first lens and the at least one second lens together constituting an imageable optical system; and
A glue material bonding the at least one first lens and the second lens barrel together, and the glue material being interposed between the non-optical area of the at least one first lens and the second lens barrel,
The optical lens further comprises a first gap and a second gap between the first lens component and the second lens component, the adhesive comprises a first adhesive and a second adhesive, the first adhesive and the second adhesive are respectively coated on the first gap and the second gap, the first gap is closer to the outer side of the optical lens than the second gap, the first adhesive is an adhesive which is cured through light, the first adhesive can be used for pre-fixing, and the second adhesive is used for permanent fixing.
2. The optical lens of claim 1 wherein an axis of a first lens closest to the second lens element and an axis of a second lens closest to the first lens element have an angle therebetween that is not zero.
3. The optical lens of claim 1, wherein the light shielding portion is a first barrel, and the at least one first lens is mounted in the first barrel.
4. The optical lens of claim 1, wherein the adhesive is interposed between one of the at least one first lens and an end surface of the second barrel closest to the second lens component.
5. The optical lens of claim 4, wherein the adhesive is interposed between the non-optical surface of one of the first lenses closest to the second lens element and the end surface of the second barrel.
6. The optical lens of claim 1, wherein the second adhesive is interposed between a first one of the at least one first lens closest to the second lens component and a second one of the at least one second lens closest to the first lens component, and wherein the second adhesive provides an adhesive force greater than an adhesive force provided by the first adhesive.
7. The optical lens of claim 1, wherein the top surface of the second barrel comprises a second planar surface, the first gap and the second gap each being located between the second planar surface and the bottom surface of the non-optical zone of the first lens.
8. The optical lens of claim 7, wherein the first gap is located between a first lens piece closest to the second lens component and an end face of the second barrel; and the second gap is located between the one first lens closest to the second lens component and the one second lens closest to the first lens component.
9. The optical lens of claim 1, wherein the non-optical surface of one of the at least one first lens closest to the second lens component has a roughened surface.
10. The optical lens of claim 9, wherein the non-optical face of the one of the at least one second lens closest to the first lens component has a roughened surface.
11. The optical lens of claim 1, wherein the glue is used to support and secure the first lens component and the second lens component such that the relative positions of the first lens component and the second lens component remain in the relative positions determined by active calibration.
12. The optical lens of claim 1, wherein the second glue is a glue that is cured by thermal curing, moisture curing, anaerobic curing, or oxidation.
13. The optical lens of claim 1, wherein the first glue material is UV glue.
14. The optical lens of claim 1, wherein the second adhesive is a thermosetting adhesive or a UV thermosetting adhesive.
15. The optical lens of claim 1, wherein the first and second glue materials are the same material when in a liquid state, and the first and second glue materials form different materials having different microstructures after curing, such that the adhesive force provided by the second glue material after curing is greater than the adhesive force provided by the first glue material after curing.
16. The optical lens of claim 1, wherein the first and second gel materials are not in contact with each other.
17. The optical lens according to claim 1, wherein a dimension of the first gap in a direction along an optical axis of the optical lens is 30-100 μm.
18. The optical lens according to claim 1, wherein a dimension of the second gap in a direction along an optical axis of the optical lens is 30-100 μm.
19. The optical lens according to claim 1, wherein a difference in a dimension of the second gap and the first gap in a direction along an optical axis of the optical lens is less than a threshold value.
20. The optical lens according to claim 1, wherein the second gap has a second opening toward an optical axis of the optical lens, a size of the second opening in a direction along the optical axis being larger than an average size of the second gap.
21. The optical lens according to claim 1, wherein the first gap has a first opening toward an outside of the optical lens, a size of the first opening being larger than an average size of the first gap in a direction along an optical axis of the optical lens.
22. The optical lens of claim 1, wherein the first lens is closer to a front end of the optical lens than the second lens.
23. The optical lens of claim 8 wherein said one first lens closest to said second lens component has a first boss projecting toward said second lens component and said second gap is located between said first boss and said non-optical face of said one second lens closest to said first lens component.
24. The optical lens of claim 23 wherein the non-optical face of a second lens closest to the first lens component has a first groove, the second gap being located between the first boss and the first groove.
25. The optical lens of claim 24, wherein the first boss is annular in a bottom view and the first recess is annular in a top view.
26. The optical lens of claim 23, wherein a first lens closest to the second lens part has a plurality of first bosses protruding toward the second lens part, and the plurality of first bosses are distributed on a circle in a bottom view; and an end surface of the second lens component has a plurality of first grooves for accommodating the plurality of first bosses, and the second gap is located between the plurality of first bosses and the plurality of first grooves.
27. The optical lens of claim 26, wherein sidewalls of the plurality of first grooves are formed by the second barrel, and bottom surfaces of the plurality of first grooves are formed by the non-optical surface of the one second lens closest to the first lens part.
28. The optical lens of claim 8, wherein an end face of the second barrel has a second boss facing the first lens component, and the non-optical face of the one first lens closest to the second lens component has a second groove, the second gap being between the second boss and the second groove.
29. An imaging module comprising the optical lens of any one of claims 1-28.
30. An optical lens assembly method, comprising:
preparing a first lens part including at least one first lens and a light shielding part located at a top surface and a side surface of a non-optical area of the at least one first lens, wherein a thickness of the light shielding part is smaller than a thickness of a cylinder wall of a cylinder required to support the at least one first lens, and a second lens part including a second cylinder and at least one second lens located within the second cylinder;
Pre-positioning the first lens component and the second lens component such that the at least one second lens and the at least one first lens together form an imageable optical system;
Adjusting and determining the relative positions of the first lens component and the second lens component based on active calibration; and
Bonding the at least one first lens and the second lens barrel by a glue material, wherein the glue material is arranged between the non-optical area of the at least one first lens and the second lens barrel,
Wherein the pre-positioning the first lens component and the second lens component includes forming a first gap and a second gap between the first lens component and the second lens component, wherein the first gap is closer to an outside of the optical lens than the second gap; and
The bonding by the adhesive material comprises the following steps: coating a first glue material of the glue material and a second glue material of the glue material on the first gap and the second gap respectively, solidifying the first glue material to pre-fix the first lens component and the second lens component, and solidifying the second glue material to permanently bond the first lens component and the second lens component.
31. The method of claim 30, wherein the actively calibrating comprises: the first lens is ingested and moved to adjust and determine the relative position of the first lens and the second lens component.
32. The method of optical lens assembly of claim 31, wherein the actively calibrating further comprises: and adjusting and determining an included angle of the axis of the first lens relative to the axis of the second lens according to the actually measured resolving power of the optical system.
33. The method of optical lens assembly of claim 32, wherein the actively calibrating further comprises: moving the first lens along a plane, determining a relative position between the first lens and the second lens component in a moving direction along the plane according to an actual measured resolving power of the optical system; movement along the plane includes translation and/or rotation in the plane.
34. The method of optical lens assembly of claim 33, wherein the actively calibrating further comprises: the first lens is moved in a direction perpendicular to the plane, and a relative position between the first lens and the second lens component in the moving direction perpendicular to the plane is determined based on the measured resolving power of the optical system.
35. The method of assembling an optical lens of claim 30, wherein the bonding by adhesive comprises:
The at least one first lens and the second lens component are supported with a cured glue material to maintain the relative positions of the first lens component and the second lens component in a relative position determined by active calibration.
36. The method of assembling an optical lens of claim 30, wherein the adhesive force of the second adhesive material is greater than the adhesive force of the first adhesive material.
37. The method of assembling an optical lens according to claim 36, wherein in the step of positioning the first lens part and the second lens part, the first gap formed is located between a non-optical surface of one of the at least one first lens closest to the second lens part and an end surface of the second barrel; and the second gap is formed between the one first lens closest to the second lens component and the one second lens closest to the first lens component.
38. The method of assembling an optical lens of claim 37, wherein in the step of bonding by adhesive, the first adhesive is a UV adhesive, and the second adhesive is a thermosetting adhesive or a UV thermosetting adhesive.
39. The method for assembling the camera module is characterized by comprising the following steps:
Assembling an optical lens using the optical lens assembly method of any one of claims 30-38; and
And manufacturing an image pickup module by using the assembled optical lens.
40. The method for assembling the camera module is characterized by comprising the following steps:
Preparing a first lens unit and an image pickup module unit, wherein the image pickup module unit includes a second lens unit and a photosensitive module that are combined together, and the first lens unit includes at least one first lens and light shielding portions located on top and side surfaces of a non-optical area of the at least one first lens, wherein a thickness of the light shielding portions is smaller than a thickness of a cylinder wall of a lens barrel required to support the at least one first lens, and the first lenses are held fixed relative to each other by being fitted to each other when the number of the first lenses is plural, the second lens unit includes a second lens barrel and at least one second lens located within the second lens barrel;
Pre-positioning the first lens component and the second lens component such that the at least one second lens and the at least one first lens together form an imageable optical system;
Adjusting and determining the relative positions of the first lens component and the second lens component based on active calibration; and
Bonding the at least one first lens and the second lens barrel by a glue material, wherein the glue material is arranged between the non-optical area of the at least one first lens and the second lens barrel,
The method further comprises forming a first gap and a second gap between the first lens component and the second lens component, wherein the second gap is closer to the optical axis of the camera module than the first gap, the glue comprises a first glue and a second glue, the first glue and the second glue are respectively coated in the first gap and the second gap, the first glue is a glue which is cured by light, the first glue can be used for pre-fixing, and the second glue is used for permanent fixing.
CN201810220657.7A 2018-03-16 2018-03-16 Optical lens, camera module and assembling method thereof Active CN110275263B (en)

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US16/979,688 US11899268B2 (en) 2018-03-16 2019-03-18 Optical lens, camera module and assembly method therefor
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101571617A (en) * 2008-04-30 2009-11-04 旭丽电子(广州)有限公司 Lens module
CN101983348A (en) * 2008-04-09 2011-03-02 日立麦克赛尔株式会社 Lens unit, camera module and lens unit manufacturing method
CN102449523A (en) * 2009-08-31 2012-05-09 松下电器产业株式会社 Lens tube, image pickup device, and portable terminal apparatus
CN103545707A (en) * 2013-10-31 2014-01-29 海信集团有限公司 Laser light beam collimation device and manufacturing method thereof
KR20140076761A (en) * 2012-12-13 2014-06-23 삼성전기주식회사 Lens module
JP2017003773A (en) * 2015-06-10 2017-01-05 オリンパス株式会社 Bonding and fixing structure of lens
CN206523669U (en) * 2017-01-13 2017-09-26 瑞声科技(新加坡)有限公司 Camera lens module
CN208367291U (en) * 2018-03-16 2019-01-11 宁波舜宇光电信息有限公司 Optical lens and camera module

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101983348A (en) * 2008-04-09 2011-03-02 日立麦克赛尔株式会社 Lens unit, camera module and lens unit manufacturing method
CN101571617A (en) * 2008-04-30 2009-11-04 旭丽电子(广州)有限公司 Lens module
CN102449523A (en) * 2009-08-31 2012-05-09 松下电器产业株式会社 Lens tube, image pickup device, and portable terminal apparatus
KR20140076761A (en) * 2012-12-13 2014-06-23 삼성전기주식회사 Lens module
CN103545707A (en) * 2013-10-31 2014-01-29 海信集团有限公司 Laser light beam collimation device and manufacturing method thereof
JP2017003773A (en) * 2015-06-10 2017-01-05 オリンパス株式会社 Bonding and fixing structure of lens
CN206523669U (en) * 2017-01-13 2017-09-26 瑞声科技(新加坡)有限公司 Camera lens module
CN208367291U (en) * 2018-03-16 2019-01-11 宁波舜宇光电信息有限公司 Optical lens and camera module

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