WO2023071732A1 - 光学镜头及相应的摄像模组 - Google Patents

光学镜头及相应的摄像模组 Download PDF

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Publication number
WO2023071732A1
WO2023071732A1 PCT/CN2022/123948 CN2022123948W WO2023071732A1 WO 2023071732 A1 WO2023071732 A1 WO 2023071732A1 CN 2022123948 W CN2022123948 W CN 2022123948W WO 2023071732 A1 WO2023071732 A1 WO 2023071732A1
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WO
WIPO (PCT)
Prior art keywords
lens
optical
glue
bonding
lens barrel
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Application number
PCT/CN2022/123948
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English (en)
French (fr)
Inventor
刘林
叶超
林麒麟
褚彭淞
Original Assignee
宁波舜宇光电信息有限公司
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Application filed by 宁波舜宇光电信息有限公司 filed Critical 宁波舜宇光电信息有限公司
Priority to CN202280065655.XA priority Critical patent/CN118056149A/zh
Publication of WO2023071732A1 publication Critical patent/WO2023071732A1/zh

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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
    • 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
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
    • 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

Definitions

  • the invention relates to the field of camera module technology, in particular, the invention relates to a compact optical lens and a corresponding camera module.
  • the factors that affect the resolution of the lens come from the error of each component and its assembly, the error of the thickness of the lens spacing element, the error of the assembly of each lens, and the change of the refractive index of the lens material.
  • the errors of each component and its assembly include errors such as the thickness of the optical surface of each lens monomer, the sagittal height of the optical surface of the lens, the shape of the optical surface, the radius of curvature, the eccentricity of the single surface of the lens and between surfaces, and the inclination of the optical surface of the lens.
  • the size depends on the mold precision and molding precision control ability.
  • the error of the thickness of the lens spacing element depends on the processing accuracy of the element.
  • the error of the assembly fit of each lens depends on the dimensional tolerance of the assembled components and the assembly accuracy of the lens.
  • the error introduced by the variation of the refractive index of the lens material depends on the stability of the material and the batch consistency. The errors of the above-mentioned components affecting the resolution are accumulated and deteriorated, and this accumulated error will continue to increase with the increase in the number of lenses.
  • the existing resolution solution is to control the tolerance of the size of each relatively sensitive component and compensate for the rotation of the lens to improve the resolution.
  • the relative positions of the upper and lower sub-lenses are adjusted and determined based on the active alignment process (also called the AOA process), and then the upper and lower sub-lenses are bonded together according to the determined relative positions to manufacture a complete optical lens or camera module.
  • the active alignment process also called the AOA process
  • This solution can improve the process capability index (CPK) of mass-produced optical lenses or camera modules; it can make the control of each component of the material (such as the sub-lens or photosensitive component used to assemble the optical lens or camera module)
  • CPK process capability index
  • the requirements for accuracy and assembly accuracy become looser, thereby reducing the overall cost of optical imaging lenses and camera modules; various aberrations of camera modules can be adjusted in real time during the assembly process, reducing defective rates, reducing production costs, and improving Image quality.
  • the aforementioned lens assembled based on the active calibration process may also be called a multi-group lens, or a split lens.
  • a multi-group lens different groups of lens components (such as upper and lower sub-lenses) are connected using adhesives formed by curing glue. lens) so that the relative position of the two sub-lenses is permanently maintained at the relative position determined by the active calibration.
  • the cured glue and the two lens components need to maintain a certain structural strength during subsequent testing and use, so as to prevent various environmental factors from having a greater negative impact on the reliability of the lens.
  • the two lens components together constitute the imaging optical system, and the small changes in the glue and the area near the bonding surface may change the surface shape or relative shape of the optical surface of the imaging system. Therefore, it is necessary to conduct in-depth research on the glue and the parts it is bonded to, so that the assembled lens can maintain stable optical performance for a long time.
  • the purpose of the present invention is to overcome the deficiencies of the prior art and provide a solution for multi-group optical lenses and camera modules whose optical performance can be maintained stable for a long time.
  • the present invention provides an optical lens, which includes: a first lens part, which includes a first lens; a second lens part, which includes a second lens barrel and at least A second lens, the first lens part and the second lens part are coaxially arranged; and a bonding part, which is formed by curing the first glue, and the first glue is arranged between the second lens barrel and the second lens barrel between the first lenses, and support the first lens and the second lens component after curing; wherein, on the projection plane perpendicular to the optical axis of the optical lens, the bonding member has a A circular ring with at least three notches; the central angle ⁇ corresponding to each notch on the circular ring where the bonding part is located is 10°-15°.
  • the bonding piece includes a plurality of arc-shaped bonding sections, any two of the arc-shaped bonding sections are separated by the gap, and any one of the arc-shaped bonding sections is in the
  • the central angle ⁇ corresponding to the circular ring is at least 75°.
  • the first lens includes an optically effective area and a structural area surrounding the optically effective area
  • the bonding member bonds the bottom surface of the structural area of the first lens with the second lens barrel the top surface; the bottom surface of the first lens, the top surface of the second lens barrel, the top surface of the second lens closest to the object side and the bonding member form a first cavity, the The notch of the bonding member constitutes an air escape channel for communicating the first cavity with the outside air.
  • the gap is not blocked by filler, so as to keep the first cavity in communication with the outside air.
  • the first lens part also includes a first lens barrel, the first lens is located in the first lens barrel, but there is no gap between the inner surface of the first lens barrel and the outer surface of the first lens. leaning against each other;
  • the first lens barrel includes a first side wall and a first top cover formed by extending inwardly and transversely from the top of the first side wall, and a light hole is formed in the center of the first top cover;
  • the first side wall is located outside the outer surface of the structure area of the first lens, the first top cover is located above the top surface of the structure area of the first lens, and the first cover is located above the top surface of the structure area of the first lens.
  • the bonding member has four notches and four arc-shaped bonding segments, and for any one of the arc-shaped bonding segments, its corresponding central angle ⁇ is 75°-80°.
  • the bonding member has three notches and three arc-shaped bonding sections.
  • the first lens is a glass lens
  • the second lens barrel is a plastic lens barrel
  • the at least three notches are evenly distributed on the circular ring where the bonding part is located.
  • a reinforcing glue layer is also provided between the first lens and the second lens part, and the reinforcing glue layer is arranged on the periphery of the bonding member, and the reinforcing glue layer is not closed. of rings.
  • the reinforcing glue layer is made of glue whose modulus of elasticity is smaller than that of the bonding part.
  • the first glue material is arranged on the top surface of the second lens barrel in the form of glue, and forms the bonding part after being heated and cured;
  • the outer side arranges the periphery of the adhesive.
  • the outer surface of the first lens is partially covered by the reinforcing glue layer.
  • the reinforcing glue layer forms a circular ring with a second gap, wherein the second glue is arranged in a closed circular ring at the stage of distributing glue, and the second glue is formed under the impact of expansion gas during heating and curing.
  • the second notch is located at the position of one of the notches of the bonding member; the entrance size of the second notch is larger than the exit size thereof, and the entrance of the second notch is located close to the adhesive
  • the outlet of the second notch is located on the side away from the bonding part.
  • the reinforcing glue layer is formed by a single continuous glue segment, and the reinforcing glue layer is provided with a single second notch, and the second notch is set in the same orientation as one of the notches of the bonding member .
  • the position of the second notch of the reinforcing glue layer is staggered from the position of the notch of the adhesive member.
  • the present invention also provides a camera module, which includes: a photosensitive component, which has a photosensitive chip; and the optical lens described in any of the preceding solutions; the optical lens is directly or indirectly installed on the photosensitive component, so that the The photosensitive chip is adapted to receive light passing through the first lens and the at least one second lens and output imaging data.
  • the camera module further includes an optical actuator, the optical lens is installed on the optical actuator, and is indirectly installed on the photosensitive component through the optical actuator.
  • This application can improve the process capability index (CPK) and mass production yield of lens assembly by optimizing the shape and structure of the glue.
  • the arrangement of the first glue in a circular shape and the reasonable notch design make it possible for the first glue to be cured (especially heat-cured) to prevent the expansion gas from impacting the split lens (especially the AOA split lens)
  • the surface shape and position of the optical elements of the lens will cause impacts, thereby avoiding the deterioration of optical imaging quality.
  • the length of the arc-shaped glue section and the reasonable design of the gap it can effectively ensure that the split-type lens is not damaged during various tests and long-term use.
  • the optical imaging quality is stable and reliable.
  • the gap is retained (that is, the gap is not filled with glue to seal the gap), and the reinforcement glue layer arranged on its periphery is used to realize the anti-corrosion effect. Dust function, while maintaining the balance of air pressure inside and outside the lens. In this way, the deterioration of the optical imaging quality of the split lens (especially the AOA split lens) caused by the excessive air pressure in the lens during various tests and long-term use can be avoided, and the degumming phenomenon can also be avoided.
  • Fig. 1 shows a schematic longitudinal sectional view of an optical lens made based on an active calibration process according to an embodiment of the present application
  • Fig. 2 shows a schematic longitudinal section of a camera module according to an embodiment of the present application
  • FIG. 3 shows a schematic diagram of a second lens component in an embodiment of the present application at a top view angle
  • Fig. 4 shows a schematic diagram of a second lens component in another embodiment of the present application under a top view angle
  • Fig. 5 shows the arc angle of the notch and the arc-shaped bonding section of the bonded part under the plan view angle
  • Fig. 6 shows a bonded piece with an exhaust structure in one embodiment of the present application
  • Fig. 7 shows a schematic cross-sectional view of a split lens with inner and outer double-layer adhesives in some embodiments of the present application
  • Fig. 8 shows a partially enlarged schematic diagram of the glued area of the split lens in Fig. 7;
  • Fig. 9 shows a schematic top view of an optical lens with a double-layer glue cloth with a pointed notch
  • Fig. 10 shows a schematic top view of an optical lens with a rubber gap in another embodiment of the present application
  • Fig. 11 shows the arc angle ⁇ of the escape hole in Fig. 10;
  • Figure 12 shows the gap between the first lens and the second lens component and the thickness of the adhesive
  • Figure 13 shows an example of a lens with notches
  • FIG. 14 shows a schematic cross-sectional view of a photosensitive assembly in an embodiment of the present application.
  • first, second, etc. are only used to distinguish one feature from another, and do not represent any limitation on the features. Accordingly, a first body discussed hereinafter may also be referred to as a second body without departing from the teachings of the present application.
  • an optical lens manufactured based on an active calibration process includes a first lens component, a second lens component and a bonding member.
  • the first lens component includes at least a first lens (the number of which may be single).
  • the second lens part includes a second lens barrel and at least one second lens installed in the second lens barrel, the first lens part and the second lens part are coaxially arranged, and the first lens and the second lens part are arranged coaxially.
  • the above at least one second lens jointly constitutes an optical system for imaging.
  • the bonding part is formed by curing the first glue, the first glue is arranged between the second lens barrel and the first lens, and supports the first lens and the second lens component after curing , so that the relative position of the two is maintained at the relative position determined by the active calibration.
  • Active calibration is based on the actual imaging data of the optical system received and output by the photosensitive element (such as a photosensitive chip) to adjust the relative positions of the two optical systems (ie, the two lens groups) of the first lens and the second lens component production process.
  • the bonding member on the projection plane perpendicular to the optical axis, forms a circular ring with at least two notches, and the at least two notches are evenly distributed in the circular ring where the bonding member is located. superior.
  • the central angle of the arc segment formed by the notch in the circumferential direction of the ring is 10°-15°.
  • the central angle corresponding to the circular arc is referred to as the arc angle in this paper, which can be combined with reference to Figure 5, wherein the arc angle ⁇ represents the central angle of the arc segment corresponding to the notch in the circumferential direction of the ring, hereinafter, the arc
  • the meaning of the angle will not be repeated.
  • the inventors of this case have conducted in-depth research and found that the gap of this size can lead to a high process capability index (CPK) of lens assembly and a high actual mass production yield.
  • CPK process capability index
  • the gap of this size can allow the expansion gas generated during the heating and curing process of the first adhesive to be quickly discharged, preventing the expansion gas from accumulating inside the lens and causing damage to the first lens, the second lens and the second lens barrel in a local area. and other components form excessive pressure, thereby avoiding the change of the surface shape of the first lens and the second lens or the deviation of the relative positions of the two.
  • the above-mentioned gap will not be too large, combined with the arrangement of the circular first glue painting (or called dispensing), the bonding parts of this embodiment have better cohesive force and can withstand The high and low temperature impact of the optical lens during the test or use can avoid degumming.
  • a series of embodiments of the present application will be described below with reference to FIGS. 1-4 .
  • FIG. 1 shows a schematic longitudinal cross-sectional view of an optical lens manufactured based on an active calibration process according to an embodiment of the present application.
  • the optical lens 10 is a split lens, which includes at least two lens components.
  • the optical lens 10 includes two lens components as an example, that is, the optical lens 10 includes a first lens component 11 and a second lens component 12 as an example.
  • the optical lens 10 may also include more lens components.
  • the optical lens 10 includes a first lens part 11 and a second lens part 12, and the first lens part 11 and the second lens part 12 form a complete optical system, that is, the first lens
  • the optical system formed by the component 11 and the second lens component 12 can clearly image on the photosensitive assembly.
  • the first lens component 11 is glued together with the second lens component 12 through an adhesive member 20 (will be described in detail later).
  • the first lens part 11 is adhesively fixed to the light-incident side of the second lens part 12, that is, the first lens part 11 is close to the object side of the camera module, and the second lens The component 12 is close to the image side of the camera module.
  • FIG. 2 shows a schematic longitudinal sectional view of a camera module according to an embodiment of the present application.
  • the camera module 100 includes an optical lens 10 and a photosensitive assembly 30, the optical lens 10 is held on the photosensitive path of the photosensitive assembly, so that the photosensitive assembly can receive the light projected from the optical lens 10 light for imaging.
  • the first lens includes an optically effective area and a structure area surrounding the optically effective area, and the bonding member bonds the structure of the first lens area of the bottom surface and the top surface of the second barrel.
  • the cavity formed by the bottom surface of the first lens, the top surface of the second lens barrel, the top surface of the second lens closest to the object side, and the bonding member is referred to as the first cavity.
  • the notch of the bonding member constitutes an air escape channel for communicating the first cavity with the outside air.
  • the gap is not blocked with a filler, so as to keep the first cavity in communication with the outside air. It will be described below in conjunction with FIG. 1 .
  • the first lens assembly 11 includes a first lens 111 and a first lens barrel 112 , and the first lens 111 is accommodated and installed in the first lens barrel 112 Among them, the first lens 111 has a convex portion 1111 that is circular in plan view at the center for optical imaging, and has a platform outer edge portion 1112 at the periphery.
  • the protruding portion 1111 of the first lens 111 is an optical zone capable of allowing light to pass through and form an image, while the outer edge portion 1112 is a structural zone, and the structural zone surrounds the optical zone.
  • the first lens component 11 may be implemented as a “bare lens”, which only includes one piece of the first lens 111 .
  • the first lens barrel 112 includes a first laterally extending portion 1121 and a first longitudinally extending portion 1122, and the first lens 111 is accommodated in the first laterally extending portion 1122. The receiving space formed by the portion 1121 and the first longitudinally extending portion 1122 .
  • the first laterally extending portion 1121 and the first longitudinally extending portion 1122 can be integrally formed by injection molding or other processes (that is, the first lens barrel 112 is integrally formed components); or, the first laterally extending portion 1121 and the first longitudinally extending portion 1122 can be molded separately and then assembled together to form the first lens barrel 112 .
  • the first laterally extending portion 1121 extends inwardly from the top of the first lens barrel 112, the first laterally extending portion 1121 has an inner surface whose inner diameter gradually decreases along the incident light direction, and the convex portion of the first lens
  • the output portion 1111 is accommodated in the accommodation space formed by the inner side of the first laterally extending portion 1121 to provide sufficient space for the incidence of light, and the inner side of the first laterally extending portion 1121 can further reduce side clutter. light generation.
  • the first laterally extending portion 1121 blocks the outer edge portion 1112 of the first lens 111 and at least a part of the protruding portion 1111 of the first lens 111 .
  • inward refers to a direction toward the optical axis; outward refers to a direction away from the optical axis.
  • the first laterally extending portion 1121 is disposed above the outer edge portion 1112 of the first lens 111 , and the first laterally extending portion 1121 is disposed above the upper surface of the first lens 111 , and There is an air gap between the bottom surface of the first laterally extending portion 1121 and the upper surface of the outer edge portion 1112 of the first lens 111 (that is, the bottom surface of the first laterally extending portion 1121 and the outer edge of the first lens 111
  • the upper surfaces of the parts 1112 do not bear against each other, and no glue is filled between the two, so as to keep an air gap), so as to effectively reduce the state change of the first lens barrel 112 caused by the state of the first optical lens Influence.
  • the size of the gap between the first laterally extending portion 1121 of the first lens barrel 112 and the upper surface of the first lens 111 ranges from 5 ⁇ m to 10 ⁇ m.
  • the first longitudinally extending portion 1122 extends downward from the bottom of the first lens barrel 112 , and the first longitudinally extending portion 1122 has a ring structure and is fixed above the second lens component 12 .
  • the optical lens 10 directly affects the imaging quality of the camera module 100 .
  • different lens components are connected using adhesives 20 , so the optical lens 10 often needs to be baked to cure the adhesives 20 to realize the connection.
  • an adhesive member 20 needs to be arranged between the first lens 111 and the second lens barrel 121 .
  • the bonding member 20 is used to support the first lens 111 and the second lens component 12 after curing, and keep the relative position between them at the relative position determined by the active calibration.
  • the adhesive member 20 is made of UV thermosetting adhesive, which can be pre-cured by light, and then fully cured by baking.
  • an air escape channel 40 can refer to FIG. 3, which shows a schematic diagram of the second lens assembly in one embodiment of the application at a top view angle, which shows a point on the top surface of the second lens barrel
  • the glue forms an unclosed circular bond
  • the air escape channel 40 can communicate the air in the optical lens 10 with the outside world, so that the expanded gas can escape during baking, so as to avoid the impact of the expanded gas on the adjacent first lens part 11 and the
  • the second lens part 12 forms excessive pressure, which causes the relative position of the first lens 111 and the second lens barrel 121 to shift or the optical effective area of the optical element (such as the first lens or the second lens) Deformation occurs, which in turn affects optical performance.
  • the bonding member on the projection plane perpendicular to the optical axis, forms a circular ring with at least two notches, and the at least two notches are evenly distributed on the circle where the bonding member is located. on the ring.
  • an arc angle ⁇ of the notch in the circumferential direction of the ring is 10° ⁇ 15°.
  • the gap of this size can lead to a high process capability index (CPK) of lens assembly and a high actual mass production yield.
  • the gap of this size can allow the expansion gas generated during the heating and curing process of the first adhesive to be quickly discharged, preventing the expansion gas from accumulating inside the lens and causing damage to the first lens, the second lens and the second lens barrel in a local area. and other components form excessive pressure, thereby avoiding the change of the surface shape of the first lens and the second lens or the deviation of the relative positions of the two.
  • the bonding part of this embodiment has better adhesion, and can withstand the optical lens during testing or use. High and low temperature shocks in the environment to avoid degumming.
  • the bonding member 20 may be composed of three arc-shaped bonding sections.
  • the number of the escape channels 40 is three, and the arc-shaped bonding section is spaced apart from the escape channels 40 .
  • the bonding member 20 is in the shape of a triple C.
  • the increase in the number of the escape channels 40 can increase the amount of escape air, which helps the expanded gas in the confined space to escape quickly, so as to avoid excessive effects on adjacent components, resulting in the first lens 111 and the second lens 111 colliding with each other.
  • the relative positions of the two barrels 121 are shifted or the components of the optical system are deformed. Under the impact of high and low temperature, the expansion and contraction deformation of the first lens 111 made of glass and the second lens barrel 121 made of plastic will be different, and then stress will be formed between the first lens 111 and the second lens barrel 121, so The increase in the number of arc-shaped bonding sections can disperse the stress, and the dispersed stress will be reduced, making debonding less likely to occur.
  • the arc angle ⁇ of each of the arc-shaped bonding sections in the circumferential direction of the ring is at least 75°, so that each of the arc-shaped bonding sections has a relatively
  • the large bonding area helps to improve the structural strength of the bonded part and increase its cohesive force, so that the bonded part can stably and reliably support the first lens part and the second lens part, so that the two can maintain the active calibration position for a long time Determined relative position.
  • FIG. 4 shows a schematic diagram of the second lens component in another embodiment of the present application at a top view angle.
  • the bonding member 20 may be composed of four arc-shaped bonding sections.
  • its arc angle ⁇ in the circumferential direction of the ring is 75° to 80° (refer to Figure 5, which shows the gap of the bonded part in a top view and the arc angle of the arc bonded section).
  • each of the bonding sections is fan-shaped.
  • the four arc-shaped bonding sections can be arranged axisymmetrically with respect to the first lens 111, and on the projection plane perpendicular to the optical axis of the first lens 111, the four arc-shaped bonding sections are in the form of Central rotational symmetry.
  • the bonding parts 20 are four C-shaped, and the connecting line of the bonding parts 20 is a circular shape. Viewed in a direction perpendicular to the axis of the first lens 111 , the four air escape channels 40 are centrally symmetrical with respect to the optical axis of the first lens 111 .
  • the bonding part 20 includes a first bonding part 21, a second bonding part 22, a third bonding part 23 and a fourth bonding part 24, and the first bonding part 21 is bonded to the second bonding part.
  • the component 22 is disposed symmetrically along the axis of the first lens 111
  • the third bonding component 23 and the fourth bonding component 24 are disposed symmetrically along the axis of the first lens 111 .
  • the first adhesive part 21 , the second adhesive part 22 , the third adhesive part 23 and the fourth adhesive part 24 are arranged along the circumferential direction of the first lens 111 and the second lens barrel 121 , and distributed on the same circle.
  • the arrangement of the four air escape channels 40 can increase the amount of air escape, and help the expanded gas in the confined space to escape quickly, so as to avoid excessive effects on adjacent components, resulting in the first lens 111 and the
  • the relative position of the second lens barrel 121 is shifted or the components of the optical system are deformed. Under the impact of high and low temperature, the expansion and contraction deformation of the first lens 111 made of glass and the second lens barrel 121 made of plastic will be different, and then stress will be formed between the first lens 111 and the second lens barrel 121, so
  • the arrangement of the four bonding parts 20 and the four air escape channels 40 can disperse the stress, and the stress after dispersing will be reduced, and debonding is not easy to occur.
  • the four arc-shaped bonding sections are arranged symmetrically with respect to the axis of the first lens 111, so that the stress between the first lens 111 and the second lens barrel 121 can be distributed symmetrically, and the first lens 111 can be distributed symmetrically.
  • the first lens 111 and the second lens barrel 121 are evenly stressed around their respective circumferential directions, so as to avoid the problem of relative position deviation of the first lens 111 and the second lens.
  • the arc angle ⁇ of each of the arc-shaped bonding sections in the circumferential direction of the ring is at least 75°, so that each of the arc-shaped bonding sections has a relatively
  • the large bonding area helps to improve the structural strength of the bonded part and increase its cohesive force, so that the bonded part can stably and reliably support the first lens part and the second lens part, so that the two can maintain the active calibration position for a long time Determined relative position.
  • the material of the first lens 111 may be resin.
  • the coefficient of thermal expansion (CTE) of the material (such as plastic) of the resin lens and the second lens barrel 121 is relatively close (compared to that of the glass lens), so under the impact of high and low temperature, the deformation of the first lens 111 is similar to that of the plastic material.
  • the deformation amount of the second lens barrel 121 is relatively close, and the relative position offset of the first lens 111 and the second lens barrel 121 is relatively small.
  • the material of the first lens 111 may be glass.
  • Glass lenses have the advantages of high transmittance, high refractive index, and low astigmatism, which are conducive to improving the imaging quality of the lens and reducing the height of the lens.
  • the specific manufacturing process of glass lenses can be molded glass process or WLG wafer level glass technology.
  • the coefficient of thermal expansion (CTE) of the glass material and the plastic material of the second lens barrel 121 is different.
  • the amount of deformation is different from that of the second lens barrel 121 made of plastic and the amount of glue, so it may cause the relative position of the first lens 111 and the second lens barrel 121 to shift, or even the first lens barrel 111 made of glass
  • the lens 111 may also crack during the process of resisting temperature changes. The inventors found that under the impact of high and low temperature, the expansion and contraction deformation of the first lens 111 made of glass and the second lens barrel 121 made of plastic are different, and there will be a gap between the first lens 111 and the second lens barrel 121.
  • the first lens 111 and the second lens barrel 121 are likely to be separated from the adhesive 20, which causes the problem of debonding (referring to the detachment and fracture of the adhesive 20, i.e. cause degumming or broken glue). Therefore, setting a larger number (for example, 4) of notches on the bonding member 20 can better adapt to the case where the first lens 111 is a glass lens.
  • the thickness of the bonding part 20 is in the range of 30um-100um, preferably, the average thickness of the bonding part 20 is 60um.
  • the thickness is the dimension of the bonding member 20 along the axis of the first lens 111 (ie, the optical axis).
  • FIG. 12 shows the gap between the first lens and the second lens component and the thickness of the bonding member. Referring to FIG. 12, the thickness of the bonding member 20 is the distance H between the top surface of the bonding member 20 and its bottom surface.
  • the top surface of the bonding member 20 is bonded to the bottom surface of the first lens 111
  • the bottom surface of the bonding member 20 is bonded to the top surface of the second lens barrel 121
  • the thickness may also be referred to as the distance between the bottom surface of the first lens 111 and the top surface of the second lens barrel 121. height, or the height of the gap between the bottom surface of the first lens 111 and the top surface of the second lens barrel 121 .
  • the glue thickness of the first glue corresponding to each bonding section may be consistent, so that after the bonding part 20 is cured, the shear resistance of each bonding section is relatively close.
  • the active calibration process may adjust the inclination angle of the first lens relative to the second lens barrel 121 in order to improve the imaging quality, the final state
  • the thickness of the individual bonded sections below may vary.
  • the arc angle ⁇ of each of the arc-shaped bonding sections in the circumferential direction of the ring is at least 75°, so that each of the arc-shaped bonding sections has a relatively
  • the large bonding area helps to improve the structural strength of the bonded part and increase its cohesive force, so that the bonded part can stably and reliably support the first lens part and the second lens part, so that the two can maintain the active calibration position for a long time Determined relative position.
  • the width of each bonding section of the bonding member 20 may be the same.
  • the width refers to the width in a plan view, that is, the dimension in the radial direction of the ring where the bonding member 20 is located.
  • the bonding member 20 may include a first bonding section 21, a second bonding section 22, a third bonding section 23 and a fourth bonding section 24, the first bonding section 21, the second bonding section.
  • the widths of the bonding section 22 , the third bonding section 23 and the fourth bonding section 24 may be exactly the same.
  • the width of each bonded section ranges from 200um to 300um.
  • the bonding section may have a width of 260um.
  • the adhesive member 20 is disposed between the bottom surface of the outer edge portion 1112 of the first lens 111 and the top surface of the second lens barrel 121 , and the second A safety groove is disposed on the top surface of the lens barrel 121 near the optical axis, and the safety groove is disposed on the inner side of the adhesive member 20 .
  • the outermost side of the bonding part 20 does not exceed the maximum outer diameter of the outer edge portion 1112 of the first lens 111, the innermost side of the bonding part 20 does not exceed the safety groove, and the width of the bonding part 20 It is limited between the maximum outer diameter of the outer edge portion 1112 of the first lens 111 and the safety groove.
  • the safety groove can be a groove, so as to prevent the first glue forming the bonding part 20 from overflowing.
  • FIG. 13 shows an example of a lens with notches. Referring to FIG. 13 , the outer edge portion 1112 of the lens has a notch 1113 .
  • Improve the arc-shaped bonding section for example, the width of the arc-shaped bonding section near the notch can be reduced, so that the stress generated by the bonding section near the notch is smaller, so that the bonding section has a greater impact on the shear
  • the stress at the mouth has little effect. That is to say, in the bonding member 20, the width of the arc-shaped bonding section closest to the notch may be smaller than the width of other arc-shaped bonding sections.
  • the two ends of the bonding member 20 form an angle ⁇ with the axis of the first lens 111, and the range of the angle ⁇ is: 75° ⁇ 80° °.
  • the ⁇ angle is in the range of 75° to 80°, not only can it be ensured that the escape channel 40 will not be blocked after the adhesive 20 is cured, but also the maximum use of the adhesive 20 can be realized. quantity.
  • the bonding member 20 is provided with four air escape channels 40, and the size and dimensions of each air escape channel are the same, so that the first lens 111 and the second lens barrel 121 Each of them is uniformly stressed in the circumferential direction, and the arrangement of the four air escape channels 40 can disperse the stress, and the dispersed stress will be reduced to avoid degumming.
  • the two ends of the escape channel 40 form an angle ⁇ with the axis of the first lens 111, and the range of the angle ⁇ is: 10° ⁇ ⁇ 15°.
  • the first glue usage amount of the bonding member 20 can be optimized, and the escape channel 40 will not be formed after the bonding member 20 is cured. clogged. That is to say, when the ⁇ angle is less than 10°, since the size of the air escape channel 40 is too small, the adhesive member 20 will cause the blockage of the air escape channel 40 after curing, thereby causing the first The air in the lens 111 and the second lens barrel 121 cannot escape and expand due to heat during baking, seriously affecting the relative position accuracy between the two groups after active calibration; when the ⁇ angle is greater than 15°, there will be It may be that the adhesive force of the adhesive part 20 is too small, resulting in insufficient adhesive force, which may lead to the relative position deviation of the first lens 111 and the second lens barrel 121. In more serious cases, it may It will also cause debonding and separation between the first lens 111 and the second lens barrel 121 , causing damage to the optical lens 10 .
  • FIG. 6 shows an adhesive member with an air vent structure in an embodiment of the present application.
  • the escape channel 40 in the radial direction of the ring where the bonding member 20 is located, the escape channel 40 includes an inlet section 41 , a middle section 42 and an outlet section 43 .
  • the size of the inlet section 41 and the size of the outlet section 43 are larger than the size of the middle section 42 .
  • the middle section of the escape channel 40 is small in size, and the openings at both ends are large in size.
  • Both the inlet section 41 and the outlet section 43 form a guiding structure, which facilitates rapid removal of the expanded gas.
  • the bonded part usually needs to be sealed to prevent dust or other dirt from entering the optical lens 10 from the escape channel 40 .
  • the air escape channel 40 of the adhesive member 20 is not filled with a sealant, but the air escape channel 40 is kept unblocked.
  • the bonding part bears the burden of supporting two (or more) )
  • the function of the lens components which needs to maintain the relative position of each lens component, so that the optical imaging system remains in the state determined by the active calibration.
  • the inventors of the present application found that, for the lens based on active calibration (AOA lens), during the test process of high and low temperature shock, high temperature and high humidity, etc., the influence of the gas in the lens on the test environment factors will affect the relative position and position of the optical elements. Facial composition has a more obvious influence.
  • the bottom surface of the first lens, the top surface of the second lens barrel, the top surface of the second lens closest to the object side, and the bonding member constitute a first A cavity
  • the notch of the bonding member constitutes an air escape channel that communicates the first cavity with the outside air. If the sealant is directly filled in the escape channel, the gas in the first cavity will expand or contract rapidly due to the change of environmental parameters when performing high-low temperature impact, high temperature and high humidity tests, and the first lens, the second lens and the second lens barrel Being squeezed, the optical performance of the optical imaging system deteriorates, which in turn leads to a decrease in mass production yield and a decrease in the process capability index (CPK) of lens assembly. If the escape channel is kept unblocked, the air pressure inside and outside the optical lens 10 (referring to the inside and outside of the first cavity) is consistent, thereby avoiding the deformation of the optical lens 10 due to pressure difference from squeezing the optical lens 10 .
  • CPK process capability index
  • FIG. 7 shows a schematic cross-sectional view of a split lens with inner and outer double-layer adhesives in some embodiments of the present application.
  • FIG. 8 shows a partially enlarged schematic diagram of the glued area of the split lens in FIG. 7 .
  • glue layer 50 a reinforcing glue layer
  • the glue layer 50 can be used to prevent dust or other dirt from entering the inside of the optical lens 10 from the air escape channel 40 , so that the air escape channel 40 may not be provided with a sealant.
  • the glue layer 50 can further increase the connection strength between the first lens 111 and the second lens barrel 121 (that is, play a reinforcing role).
  • the glue layer 50 is disposed on the outside of the bonding member 20, the glue layer 50 covers at least a part of the first lens 111 and the second lens barrel 121, and the glue layer 50 and the The side of the outer edge portion 1112 of the first lens 111 is bonded, and the height of the glue layer 50 does not exceed the height of 2/3 of the side wall of the outer edge portion 1112 of the first lens 111 (that is, the glue layer 50 is arranged The area below the 2/3 height of the outer surface of the first lens structure area).
  • the glue layer 50 is adhered to the top surface of the second lens barrel 121 .
  • the glue layer 50 may use glue with a lower elastic modulus (or softer) than that of the adhesive member 20 .
  • the glue layer 50 is provided on the outer peripheral side of the first lens 111, which will have a more significant effect on the imaging quality of the lens and its long-term reliability. Specifically, since the coefficient of thermal expansion (CTE) of the glass material and the plastic material of the second lens barrel 121 is different, under the impact of high and low temperature, the first lens 111 made of glass and the second lens barrel 121 made of plastic will expand The shrinkage deformation will be different, and then stress will be formed between the first lens 111 and the second lens barrel 121 , and the existence of stress may cause the adhesive member 20 to detach and break, that is, to cause debonding or glue breaking.
  • the glue layer 50 can disperse the stress, thereby avoiding the damage of the adhesive part 20 , it can also be said that the glue layer 50 can provide protection for the adhesive part 20 .
  • the adhesive member 20 is realized by dispensing glue
  • the glue layer 50 is realized by spraying glue.
  • the glue layer 50 may or may not be in contact with the adhesive member 20 , which is not limited in the present application.
  • the glue layer 50 and the bonding member 20 can be realized by using glue of the same material.
  • the two can also be realized by using glue of different materials, wherein the elastic modulus of the glue of the glue layer 50 can be lower than the elastic modulus of the first glue of the bonding part 20 .
  • the glue layer 50 may surround the adhesive member 20, that is, a full circle of glue layer 50 is provided in the circumferential direction around the adhesive member 20, and when viewed from above , the glue layer 50 is in a ring shape.
  • the air in the first lens 111 and the second lens barrel 121 is heated and expanded, and the expanded gas will overflow through the escape channel 40, so the adhesive layer 50 and the escape The gas channel 40 relative to the position will be impacted by the gas to produce a pointed gap (i.e. the second gap 52, with reference to Fig.
  • the first lens component has been removed in this figure to clearly show the shape of the glue layer 50 and the bonding member 20), and the tip of the sharp angle is facing away from the axis, and the sharp angle will describe the optical lens 10
  • the interior space is connected with the exterior space.
  • the reinforcing glue layer may have a second notch, and the second notch is sharp-angled.
  • the second gap is formed under the impact of expansion gas (referring to the expansion gas from the inside of the adhesive and the reinforcing glue layer) when the glue is heated and cured, and the entrance size of the second gap is larger than The size of the outlet makes the second notch sharp-angled.
  • the inlet of the second notch is located on the side close to the adhesive, and the outlet of the second notch is located on the side away from the adhesive.
  • the second glue is arranged around the first bonding part 20 .
  • the second glue can be arranged in a closed circular ring.
  • the expanding gas impacts the second glue to form the second gap 52 (refer to FIG. 9 ), and the second gap is located at the position of one of the gaps of the adhesive member 20 .
  • the glue layer 50 produced by this method usually has only one second notch, and the second notch is sharp-angled.
  • the pointed second notch can not only ensure that the gas in the first cavity of the lens (refer to the above description) communicates with the outside world, but also prevent dust (or other tiny particles) from the outside from entering the lens.
  • the second glue in the stage of distributing the second glue, can also be directly provided with a second notch, the position of the second notch is facing one of the notches of the bonding part 20, and the second notch
  • the arc angle of the bonding member 20 may be smaller than the arc angle of the notch of the bonding member 20 . In this way, during the heating and curing process of the second glue, the expansion gas will impact the area near the second notch of the second glue to a certain extent, so that the second notch is sharp-angled.
  • FIG. 10 shows a schematic top view of an optical lens with a glue gap in another embodiment of the present application, in which the first lens component is removed to clearly show the shape of the glue layer 50 and the bonding member 20 .
  • a third notch can also be set on the glue layer 50 as an escape hole 51 during the glue laying stage, so that the first lens 111 and the second mirror The heated and expanded air in the cylinder 121 can directly escape through the escape hole 51 .
  • an air escape hole 51 is provided on the glue layer 50 , and the air escape hole 51 of the glue layer 50 is opposite to the air escape channel 40 of the adhesive member 20 .
  • the arc angle ⁇ corresponding to the escape hole 51 of the glue layer 50 can be the same as the arc angle ⁇ of the notch of the bonding part 20 (refer to FIG. 11, which shows the arc angle ⁇ in FIG. 10
  • the arc angle ⁇ ) of the escape hole the range of the arc angle ⁇ is: 10° ⁇ 15°.
  • the air escape hole 51 of the glue layer 50 may not be opposite to the air escape channel 40 of the adhesive member 20, that is, the air escape hole 51 and the air escape channel 40 are misplaced, and this arrangement can be further improved. Block the entry of dust or other dirt.
  • the number of the escape holes 51 may be more than one, such as 2, 3, 4, etc., which is not limited in the present application.
  • the reinforcing glue layer is made of the same glue as that of the bonding part, and the reinforcing glue layer is also arranged on the top surface of the second lens barrel by dispensing , and the width of the bonding member in the radial direction of the ring where it is located is greater than the width of the reinforcing glue layer in the radial direction of the ring where it is located.
  • the optical lens 10 is a split lens.
  • the active alignment process is used to compensate the manufacturing tolerance/assembly tolerance of the optical system components, thereby improving the overall The imaging quality and mass production yield of the optical system.
  • a first lens 111 and a second lens part 12 are provided, wherein the second lens part 12 includes a second lens barrel 121 and is mounted on the second at least one second lens 120 in the lens barrel 121; then, pre-position the first lens 111, the second lens part 12 and the photosensitive assembly so that the first lens 111, the at least one second optical The lens and the photosensitive component form an imaging system; then, perform active calibration, that is, adjust the relationship between the first lens 111 and the second lens component 12 in multiple dimensions based on the imaging quality of the image collected by the imaging system relative positional relationship between them.
  • the multiple dimensions here can be the three axes of x, y, and z and the three rotation directions of Rx, Ry, and Rz, that is, the adjustment under the 6-axis movement.
  • the dimensions of active calibration can also be limited to some of the above six dimensions.
  • active calibration can be limited to positional adjustments in 3, 4 or 5 dimensions. Actively adjust the relative position between the first lens part 11 and the second lens part 12 in real time.
  • the imaging quality of the optical lens 10 (mainly including optical parameters such as peak value, curvature of field, and astigmatism) reaches target value; furthermore, in response to the imaging quality of the image collected by the imaging system meeting the preset requirements, the relative positional relationship between the first lens 111 and the second lens component 12 is fixed; then, the The first longitudinal extension portion 1122 of the first lens barrel 112 is on the support portion 1211 of the second lens barrel 121, so that the first lens barrel 112 is suspended and supported on the second lens barrel 121 and the The first lens barrel 112 covers at least a part of the side surface and the upper surface of the first lens 111 .
  • the first glue can be arranged on the top surface of the second lens barrel 121 first, and then the first lens 111 is moved to the top of the second lens part and An imageable optical system is formed, and then the relative positions of the first lens 111 and the second lens part are adjusted according to the actual output imaging data of the photosensitive chip (ie, active calibration), and after obtaining optimized imaging quality (ie, after the active calibration is completed) ), the first glue can be pre-cured (or called temporary curing) by light (or other means). After pre-curing, the first glue can support the first lens 111 and the second lens component in a short period of time, so that the relative position of the two can be maintained at the relative position determined by the active calibration. Finally, the relatively fixed combination of the first lens 111 and the second lens component may be baked to completely cure the first glue.
  • active calibration can be performed first, and after recording the relative position determined by the active calibration, the first lens 111 is removed, and then the first glue is arranged On the top surface of the second lens barrel, move the first lens 111 back to its original position (ie the relative position determined by the recorded active calibration).
  • the first glue is pre-cured (or called temporary curing) by light (or other means).
  • the first glue can support the first lens 111 and the second lens component in a short period of time, so that the relative position of the two can be maintained at the relative position determined by the active calibration.
  • the relatively fixed combination of the first lens 111 and the second lens component may be baked to completely cure the first glue.
  • the outer surface of the first lens 111 and the second lens barrel 121 and the second lens barrel 121 can be viewed from the outside.
  • a gap between the lenses 111 is sprayed with glue, so that a reinforcing glue layer 50 is arranged on the periphery of the bonding member 20 .
  • the reinforcing glue layer 50 can be cured only by UV light irradiation, or can be pre-cured by UV light irradiation first, and then baked and cured.
  • the number of the first lens of the first lens component may be one, that is, the group formed by the first lens component may have only one lens.
  • the clamp or other capturing mechanism, such as a suction nozzle clamps a single lens and adjusts its relative position with the second lens component, so as to realize active calibration.
  • the clamp can be loosened, and the first lens is supported by the pre-cured glue. Then the lens is baked so that the first glue is completely cured to form the bonding part.
  • the number of the first lenses of the first lens component is multiple, and multiple first lenses are fitted together to form a first lens group, or through WLG
  • the wafer-level process performs stacking to form a plurality of the first lens groups into a first lens group. Since these first lenses have been assembled into a first lens group, they can be directly clamped and moved by the fixture.
  • a plurality of the second lenses are assembled into a second lens group through the second lens barrel.
  • the inner surface of the second lens barrel can have a multi-level step structure.
  • the second lens barrel can be turned upside down, and then each second lens can be loaded into the second lens barrel in order from small to large.
  • the relative positions of the second lenses are fixed under the auxiliary support of the second lens barrel.
  • the second lens assembly 12 includes a second lens 120 and a second lens barrel 121, the second lens 120 is accommodated and installed in the second lens barrel 121, the The number of the second lens 120 is not limited by the present application, and it may be 4, 5, 6, 7 or more.
  • the second lens barrel 121 includes a second laterally extending portion 1212, the second laterally extending portion 1212 extends inwardly from the top of the second lens barrel 121, and at least a part of the second laterally extending portion 1212 Located below the outer edge portion 1112 of the first lens component 11 .
  • the top of the lens barrel has an annular groove around the side wall of the second lens barrel 121, the groove forms an annular support portion 1211 and surrounds the side of the second lens barrel 121,
  • the support portion 1211 is located outside the second laterally extending portion 1212 , that is, the support portion 1211 is located on a side away from the optical axis.
  • the top surface of the support portion 1211 may be vertical or substantially vertical to the optical axis.
  • the top surface of the support portion 1211 may also be inclined to the optical axis.
  • the annularly distributed support portions 1211 may be one support portion 1211 annularly surrounding the side of the second lens barrel 121, or multiple support portions 1211 may be annularly spaced apart. distributed on the side of the second lens barrel 121 , which is not limited in the present application.
  • the top surface of the support portion 1211 may be lower than the top surface of the second lens barrel 121 , and the top surface of the support portion 1211 may also be flush with the top surface of the second lens barrel 121 , the top surface of the support portion 1211 may also be higher than the top surface of the second lens barrel 121 .
  • the top surface of the support portion 1211 is lower than the top surface of the second lens barrel 121, that is, the height of the support portion 1211 is lower than the height of the upper surface of the second lens barrel 121, so that when the When the first lens barrel 112 is arranged on the support portion 1211, the first lens barrel 112 can be more closely suspended on the upper surface of the first lens 111, so as to reduce the overall height of the optical lens 10 .
  • the first lens component 11 and the second lens component 12 may be arranged in sequence along the optical axis, that is, the first lens component 11 is fixed on the light incident side of the second lens component 12 .
  • the first lens 111 of the first lens part 11 is fixed to the second lens barrel 121 of the second lens part 12
  • the first lens barrel 112 of the first lens part 11 is fixed to the second The second lens barrel 121 of the lens part 12 . That is to say, the first lens 111 and the first lens barrel 112 are respectively fixedly connected to the second lens barrel 121, in such a way that the first lens barrel 112 is suspended and supported on the second lens barrel 121. above the first lens 111.
  • the outer edge portion 1112 of the first lens 111 is fixed to the second laterally extending portion 1212 of the second lens barrel 121 , that is, the lower surface of the outer edge portion of the first lens 111 is passed through an adhesive 20 fixed on the upper surface of the second laterally extending portion 1212 .
  • the first longitudinally extending portion 1122 of the first lens barrel 112 is fixed to the support portion 1211 of the second lens barrel 121, and the first longitudinally extending portion 1122 is regarded as the bottom of the first lens barrel 112 facing downwards.
  • the extended protrusion, the support part 1211 is regarded as a groove formed downward on the top of the second lens barrel 121, through the cooperation between the protrusion and the groove, the first lens barrel 112
  • the longitudinally extending portion 1122 is fixed on the supporting portion 1211 of the second lens barrel 121 .
  • the first longitudinal extension portion 1122 of the first lens barrel 112 and the support portion 1211 of the second lens barrel 121 may be fixed by an adhesive, wherein the adhesive may be Adhesives suitable for curing by exposure to ultraviolet light; or adhesives suitable for curing by exposure to visible light; or adhesives suitable for curing by heat; or adhesives suitable for curing by exposure to moisture, the selection and Not limited by this application.
  • first longitudinal extension part and the support part 1211 can also be fixed by thread or buckle, so as to further strengthen the The combination between the first lens barrel 112 and the second lens barrel 121 reduces the risk of the first lens barrel 112 falling off.
  • the supporting force point of the first lens barrel 112 completely depends on the support portion 1211 of the second lens barrel 121 , and the first lens 111 is different from the The first lens barrel 112 is independent of each other in terms of structural configuration and does not provide a focus point for the installation of the first lens barrel 112 .
  • the camera module may include a photosensitive component 30 and the aforementioned split optical lens (namely, the optical lens 10 ).
  • FIG. 14 shows a schematic cross-sectional view of a photosensitive assembly in an embodiment of the present application.
  • the photosensitive component 30 may include a circuit board 31 , a photosensitive chip 32 , an electronic component 33 , a base 34 and a filter component 35 .
  • the photosensitive chip 32 is disposed on the circuit board 31 and electrically connected to the circuit board 31 .
  • the base 34 is arranged on the circuit board 31 and is located on the peripheral side of the photosensitive chip 32 , and the filter element 35 is mounted on the base 34 to be held on the photosensitive path of the photosensitive chip 32 .
  • the photosensitive chip 32 includes a photosensitive area 321 and a non-photosensitive area 322 surrounding the photosensitive area 321 .
  • the photosensitive chip 32 is mounted on the upper surface of the circuit board 31 and is electrically connected to the circuit board 31 by means of gold wires.
  • the photosensitive chip 32 can also be arranged on the circuit board 31 and/or electrically connected to the circuit board 31 in other ways, for example, by flip-chip
  • the method is attached to the lower surface of the circuit board 31, which is not limited by the present application and is limited to this embodiment. It should be understood that, in some embodiments of the present application, the photosensitive path of the photosensitive chip 32 forms the photosensitive path of the photosensitive component 30 .
  • the base 34 may be disposed on the circuit board 31 to package electronic devices on the circuit board 31 and to support other components.
  • the base is implemented as a separately molded plastic bracket, which is attached to the surface of the circuit board 31 by an adhesive and used to support other components.
  • the base can also be formed on the circuit board 31 in other ways, for example, the base is implemented as a molded base, which is integrally formed through a molding process The preset position of the circuit board 31 is not limited by the present application and is limited to this embodiment.
  • the filter element 35 may be held on the photosensitive path of the photosensitive chip 32 for filtering the imaging light entering the photosensitive chip 32 .
  • the filter element 35 is installed on the base 34 and corresponds to at least the photosensitive area of the photosensitive chip 32, in this way, the filter element 35 is held on the On the photosensitive path of the photosensitive chip 32 .
  • the filter element 35 can also be installed on the base 34 in other ways, for example, the filter element 35 is firstly arranged on the base 34 bracket, and then install the filter element 35 on the bracket of the filter element 35, that is, in this example, the filter element 35 can be indirectly installed on the base 34 through other supports .
  • the filter element 35 can also be installed in other positions of the camera module 100, for example, the filter element 35 is formed in the optical lens 10 (for example, as a layer of filter film attached to the surface of a certain optical lens of the optical lens 10), this is not limited by the present application and is limited to this embodiment.
  • the optical lens 10 is directly placed on the top surface of the photosensitive component 30 so as to be fixed on the photosensitive path of the photosensitive component 30 .
  • the optical lens 10 is arranged on the top surface of the photosensitive assembly 30 through a mirror base 13, and the middle of the mirror base 13 has a through hole, and the light refracted by the optical lens 10 can Incident to the photosensitive component 30 through the through hole.
  • the optical lens 10 is arranged on the top surface of the photosensitive element 30 through a lens driving part 14 (ie, an optical actuator), and the optical lens 10 is arranged on the lens driving part 14, and the lens driving part 14 can drive the optical lens 10 to move, so as to realize optical focus and/or optical anti-shake function.
  • the lens driving part 14 may be a driving lens driving part such as a voice coil lens driving part, a piezoelectric lens driving part, an SMA (Shape Memory Alloy) lens driving part or the like.
  • the lens driving part 14 can drive the optical lens 10 to move to achieve optical focus, optical zoom and/or optical anti-shake functions.

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Abstract

一种光学镜头(10)，包括：第一镜头部件(11)，其包括第一透镜(111)；第二镜头部件(12)，其包括第二镜筒(121)和安装于第二镜筒(121)内的至少一个第二透镜(120)，第一镜头部件(11)和第二镜头部件(12)同轴布置；以及粘结件(20)，其由第一胶水固化后形成，第一胶水布置在第二镜筒(121)与第一透镜(111)之间，并在固化后支撑第一透镜(111)和第二镜头部件(12)；其中，在垂直于光学镜头(10)的光轴的投影面上，粘结件(20)构成具有至少三个缺口的圆环形；每个缺口在粘结件(20)所在的圆环上所对应的圆心角γ为10°～15°。还提供了相应的摄像模组。本申请可以通过优化布胶的形状和结构来提高镜头组装的过程能力指数以及量产良率。

Description

光学镜头及相应的摄像模组
相关申请
本申请要求名称为“光学镜头及相应的摄像模组”、于2021年10月25日提交的中国专利申请号为202111242125.1的优先权，并在此通过引用包括上述申请的全部内容。
技术领域
本发明涉及摄像模组技术领域，具体地说，本发明涉及紧凑型光学镜头及相应的摄像模组。
背景技术
随着移动电子设备的普及，被应用于移动电子设备的用于帮助使用者获取影像(例如视频或者图像)的紧凑型摄像模组的相关技术得到了迅猛的发展和进步，并且在近年来，摄像模组在诸如医疗、安防、工业生产等诸多的领域都得到了广泛的应用。
为了满足越来越广泛的市场需求，高像素、小尺寸、大光圈是现有摄像模组不可逆转的发展趋势。然而，要在同一摄像模塑实现高像素、小尺寸、大光圈三个方面的需求是有很大难度的。例如，手机的紧凑型发展和手机屏占比的增加，让手机内部能够用于前置摄像模组的空间越来越小，而市场对摄像模组的成像质量又提出了越来越高的需求。
在紧凑型摄像模组(例如用于手机的摄像模组)领域，往往需要考虑到光学成像镜头的品质和模组封装过程中的制造误差。具体来说，在光学成像镜头的制造过程中，影响镜头解像力因素来自于各元件及其装配的误差、镜片间隔元件厚度的误差、各镜片的装配配合的误差以及镜片材料折射率的变化等。其中，各元件及其装配的误差包含各镜片单体的光学面厚度、镜片光学面矢高、光学面面型、曲率半径、镜片单面及面间偏心，镜片光学面倾斜等误差，这些误差的大小取决于模具精度与成型精度控制能力。镜片间隔元件厚度的误差取决于元件的加工精度。各镜片的装配配合的误差取决于被装配元件的尺寸公差 以及镜头的装配精度。镜片材料折射率的变化所引入的误差则取决于材料的稳定性以及批次一致性。上述各个元件影响解像力的误差存在累积恶化的现象，这个累计误差会随着透镜数量的增多而不断增大。现有解像力解决方案为对于对各相对敏感度高的元件的尺寸进行公差控制、镜片回转进行补偿提高解像力，但是由于高像素大光圈的镜头较敏感，要求公差严苛，导致镜片加工及组装难度越来越大。同时由于在组装过程中反馈周期长，造成镜头组装的过程能力指数(CPK)低、波动大，导致不良率高。且如上所述，因为影响镜头解像力的因素非常多，存在于多个元件中，每个因素的控制都存在制造精度的极限，如果只是单纯提升各个元件的精度，提升能力有限，提升成本高昂，而且不能满足市场日益提高的成像品质需求。
本申请人提出了一种基于主动校准工艺的光学镜头或摄像模组的组装方法。该方案中，基于主动校准工艺(也可称为AOA工艺)调整和确定上、下子镜头的相对位置，然后将上、下子镜头按照所确定的相对位置粘结在一起，进而制造出完整的光学镜头或摄像模组。这种解决方案能够提升大批量生产的光学镜头或摄像模组的过程能力指数(CPK)；能够使得对物料(例如用于组装光学镜头或摄像模组的子镜头或感光组件)的各个元件的精度及其装配精度的要求变宽松，进而降低光学成像镜头以及摄像模组的整体成本；能够在组装过程中对摄像模组的各种像差进行实时调整，降低不良率，降低生产成本，提升成像品质。
上述基于主动校准工艺组装的镜头也可以称为多群组镜头，或者分体式镜头。对于多群组镜头，不同群组镜头部件(例如上、下子镜头)之间使用胶水固化而形成的粘接件进行连接，该粘结件需起到支撑不同群组镜头部件(例如上、下子镜头)的作用，以使两个子镜头的相对位置永久性地维持在主动校准所确定的相对位置。为使上述粘结可靠，往往需要对所述光学镜头进行烘烤以使所述粘接件固化从而实现连接。
然而，对于多群组镜头来说，由于两个镜头部件之间的空气在烘烤时会导致气体膨胀，膨胀的气体会对两个镜头部件进行冲击，从而改变两个镜头部件的相对位置，造成光学性能下降。另外，在胶水的固化后，固化的胶水和两个镜头部件需要在后续的测试和使用过程中保持一定的结构强度，以防止各种环境因素对镜头的可靠性产生较大的负面影响。尤其是对于基于主动校准工艺组 装的分体式镜头来说，其两个镜头部件共同构成成像光学系统，胶水及其粘结面附近区域的微小变化均可能改变成像系统的光学面的面型或相对位置关系，因此需要对胶水及其所粘结的部件进行深入研究，以使得所组装的镜头能够长期维持稳定的光学性能。
综上所述，当前迫切需要一种光学性能可长期维持稳定的多群组光学镜头和摄像模组的解决方案。
发明内容
本发明的目的在于，克服现有技术的不足，提供一种光学性能可长期维持稳定的多群组光学镜头和摄像模组的解决方案。
为解决上述技术问题，本发明提供了一种光学镜头，其包括：第一镜头部件，其包括第一透镜；第二镜头部件，其包括第二镜筒和安装于第二镜筒内的至少一个第二透镜，所述第一镜头部件和所述第二镜头部件同轴布置；以及粘结件，其由第一胶水固化后形成，所述第一胶水布置在所述第二镜筒与所述第一透镜之间，并在固化后支撑所述第一透镜和所述第二镜头部件；其中，在垂直于所述光学镜头的光轴的投影面上，所述粘结件构成具有至少三个缺口的圆环形；每个所述缺口在所述粘结件所在的圆环上所对应的圆心角γ为10°～15°。
其中，所述粘结件包括多个弧形粘结区段构成，任意两个所述弧形粘结区段均由所述缺口隔开，并且任意一个所述弧形粘结区段在所述圆环上所对应的圆心角θ至少为75°。
其中，所述第一透镜包括光学有效区和围绕在所述光学有效区周围的结构区，所述粘结件粘结所述第一透镜的所述结构区的底面和所述第二镜筒的顶面；所述第一透镜的底面、所述第二镜筒的顶面、最接近物方的所述第二透镜的顶面以及所述粘结件构成一第一腔体，所述粘结件的所述缺口构成使所述第一腔体与外界气体连通的逃气通道。
其中，在所述第一胶水完全固化后，所述缺口不设置填充物堵塞，以保持所述第一腔体与外界的气体连通。
其中，所述第一镜头部件还包括第一镜筒，所述第一透镜位于所述第一镜筒内，但所述第一镜筒内侧面与所述第一透镜的外表面之间不互相承靠；所述第一镜筒包括第一侧壁和自所述第一侧壁顶部向内横向延伸而形成的第一顶盖，所述第一顶盖中央形成通光孔；所述第一侧壁位于所述第一透镜的所述结 构区的外侧面的外侧，所述第一顶盖位于所述第一透镜的所述结构区的顶面的上方,所述第一顶盖的下表面与所述第一透镜的所述结构区的上表面之间具有5μm-10μm的间隙；所述第一镜筒的所述第一侧壁的底面通过胶材直接粘结所述第二镜筒；多个所述的第二透镜通过所述第二镜筒组立为第二透镜组。
其中，所述粘结件具有四个所述缺口和四个所述弧形粘结区段，对于任意一个所述弧形粘结区段，其对应的圆心角θ为75°～80°。
其中，所述粘结件具有三个所述缺口和三个所述弧形粘结区段。
其中，所述第一透镜为玻璃材质的镜片，所述第二镜筒为塑料材质的镜筒。
其中，所述至少三个缺口均匀地分布在所述粘结件所在的圆环上。
其中，所述第一透镜与所述第二镜头部件之间还设置有补强胶水层，所述补强胶水层设置在所述粘结件的外围，并且所述补强胶水层呈不封闭的圆环形。
其中，所述补强胶水层采用弹性模量小于所述粘结件的胶水制作。
其中，所述第一胶材以画胶的方式布置在所述第二镜筒的顶面，经加热固化后形成所述粘结件；所述补强胶水层通过从所述第一透镜的外侧面布置所述粘结件的外围。
其中，所述第一透镜的外侧面被所述补强胶水层部分覆盖。
其中，所述补强胶水层形成具有第二缺口的圆环形，其中，在布胶阶段将第二胶水布置成封闭的圆环形，在在加热固化时由膨胀气体冲击下形成所述第二缺口，所述第二缺口位于所述粘结件的其中一个所述缺口的位置处；所述第二缺口的入口尺寸大于其出口尺寸，其中所述第二缺口的入口位于靠近所述粘结件的一侧，所述第二缺口的出口位于背离所述粘结件的一侧。
其中，所述补强胶水层由单条连续的胶水段形成，并且所述补强胶水层设置单个第二缺口，所述第二缺口与所述粘结件的其中一个所述缺口设置在同一方位。
其中，所述补强胶水层的第二缺口的位置与所述粘结件的所述缺口的位置错开。
本发明还提供了一种摄像模组，其包括：感光组件，其具有感光芯片；和前述任一方案所述的光学镜头；所述光学镜头直接或间接地安装于所述感光组件，使得所述感光芯片适于接收穿过所述第一透镜、和所述至少一个第二透镜的光线并输出成像数据。
其中，所述摄像模组还包括光学致动器，所述光学镜头安装于所述光学致动器，并且通过所述光学致动器间接地安装于所述感光组件。
与现有技术相比，本申请具有下列至少一个技术效果：
1.本申请可以通过优化布胶的形状和结构来提高镜头组装的过程能力指数(CPK)以及量产良率。
2.本申请的一些实施例中，通过圆环形的第一胶水布置以及合理的缺口设计，使得第一胶水固化(尤其是加热固化)阶段避免膨胀气体对分体式镜头(尤其是AOA分体式镜头)的光学元件面型和位置造成冲击，进而避免光学成像品质劣化。
3.本申请的一些实施例中，通过圆环形的第一胶水布置、弧形胶段的长度以及合理的缺口设计，可以有效地保障分体式镜头在各项测试和长期使用过程中，其光学成像品质稳定可靠。
4.本申请的一些实施例中，在第一胶水固化形成粘结件后保留其缺口(即不在缺口内填充胶材来封堵缺口)，并以设置在其外围的补强胶水层实现防尘功能，同时还保持镜头内外气压平衡。这样，可以避免各项测试和长期使用过程镜头内气压过大而造成分体式镜头(尤其是AOA分体式镜头)的光学成像品质劣化，也可以避免脱胶现象。
附图说明
图1示出了本申请一个实施例的基于主动校准工艺制作的光学镜头的纵向剖面示意图；
图2示出了本申请一个实施例的摄像模组的纵向剖面示意图；
图3示出了本申请一个实施例中的第二镜头部件在俯视角度下的示意图；
图4示出了本申请另一个实施例中的第二镜头部件在俯视角度下的示意图；
图5示出了俯视角度下粘结件的缺口和弧形粘结区段的弧角；
图6示出了本申请一个实施例中的具有排气结构的粘结件；
图7示出了本申请一些实施例中的内外双层布胶的分体式镜头的剖面示意图；
图8示出了图7的分体式镜头的布胶区域的局部放大示意图；
图9示出了具有尖角形缺口的双层布胶的光学镜头的俯视示意图；
图10示出了本申请另一实施例中的具有布胶缺口的光学镜头的俯视示意图；
图11示出了图10中的逃气孔的弧角α；
图12示出了第一透镜和第二镜头部件之间的间隙及粘结件的厚度；
图13示出了一个具有剪口的透镜的示例；
图14示出了本申请一个实施例中的感光组件的剖面示意图。
具体实施方式
为了更好地理解本申请，将参考附图对本申请的各个方面做出更详细的说明。应理解，这些详细说明只是对本申请的示例性实施方式的描述，而非以任何方式限制本申请的范围。在说明书全文中，相同的附图标号指代相同的元件。表述“和/或”包括相关联的所列项目中的一个或多个的任何和全部组合。
应注意，在本说明书中，第一、第二等的表述仅用于将一个特征与另一个特征区分开来，而不表示对特征的任何限制。因此，在不背离本申请的教导的情况下，下文中讨论的第一主体也可被称作第二主体。
在附图中，为了便于说明，已稍微夸大了物体的厚度、尺寸和形状。附图仅为示例而并非严格按比例绘制。
还应理解的是，用语“包括”、“包括有”、“具有”、“包含”和/或“包含有”，当在本说明书中使用时表示存在所陈述的特征、整体、步骤、操作、元件和/或部件，但不排除存在或附加有一个或多个其它特征、整体、步骤、操作、元件、部件和/或它们的组合。此外，当诸如“...中的至少一个”的表述出现在所列特征的列表之后时，修饰整个所列特征，而不是修饰列表中的单独元件。此外，当描述本申请的实施方式时，使用“可以”表示“本申请的一个或多个实施方式”。并且，用语“示例性的”旨在指代示例或举例说明。
如在本文中使用的，用语“基本上”、“大约”以及类似的用语用作表近似的用语，而不用作表程度的用语，并且旨在说明将由本领域普通技术人员认识到的、测量值或计算值中的固有偏差。
除非另外限定，否则本文中使用的所有用语(包括技术用语和科学用语)均具有与本申请所属领域普通技术人员的通常理解相同的含义。还应理解的 是，用语(例如在常用词典中定义的用语)应被解释为具有与它们在相关技术的上下文中的含义一致的含义，并且将不被以理想化或过度正式意义解释，除非本文中明确如此限定。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
下面结合附图和具体实施例对本发明做进一步地描述。
根据本申请的一个实施例，提供了一种基于主动校准工艺制作的光学镜头，该光学镜头包括第一镜头部件、第二镜头部件和粘结件。其中第一镜头部件至少包括第一透镜(其数目可以是单个)。第二镜头部件包括第二镜筒和安装于第二镜筒内的至少一个第二透镜，所述第一镜头部件和所述第二镜头部件同轴布置，并使所述第一透镜和所述的至少一个第二透镜共同构成用于成像的光学系统。粘结件由第一胶水固化后形成，所述第一胶水布置在所述第二镜筒与所述第一透镜之间，并在固化后支撑所述第一透镜和所述第二镜头部件，使得二者的相对位置维持在主动校准所确定的相对位置。主动校准是基于感光元件(例如感光芯片)所接收并输出的光学系统的实际成像数据，对第一透镜和第二镜头部件这两个光学体系(即两个镜片群组)的相对位置进行调整的生产工艺。本申请中，在垂直于所述光轴的投影面上，所述粘结件构成具有至少两个缺口的圆环形，所述至少两个缺口均匀地分布在该粘结件所在的圆环上。所述缺口在所述圆环的周向上所构成的弧段的圆心角为10°～15°。为便于描述，本文中将圆弧所对应的圆心角称为弧角，可结合参考图5，其中弧角γ代表所述缺口在圆环周向上所对应弧段的圆心角，下文中，弧角的含义不再赘述。本案发明人深入研究发现，这一大小的缺口，可以使得镜头组装的过程能力指数(CPK)高、实际量产良率高。一方面，该大小的缺口可以允许第一胶材加热固化过程中所产生的膨胀气体快速排出，避免该膨胀气体在镜头内部堆积而在局部区域对第一透镜、第二透镜以及第二镜筒等部件形成过大的压力，进而避免第一透镜、第二透镜的面型改变或二者相对位置发生偏离。另一方面，上述缺口也不会过大，结合圆环形的第一胶水画胶(或称为点胶)布置方式，使得本实施例的粘结件具有较好的粘结力，可承受光学镜头在测试或使用过程中出现的高低温冲击，避免出现脱胶现象。下面结合图1-图4对本申请的一系列实施例进行描述。
图1示出了本申请一个实施例的基于主动校准工艺制作的光学镜头的纵向剖面示意图。参考图1，根据本申请的一个实施例，光学镜头10为分体式镜头，其包括至少两个镜头部件。为了便于说明，在本申请的各个实施例中，以所述光学镜头10包括两个镜头部件为示例，即，以所述光学镜头10包括第一镜头部件11和第二镜头部件12为示例。当然，本领域普通技术人员应知晓，根据本申请实施例的所述光学镜头10还可以包括更多数量的镜头部件。在本实施例中，所述光学镜头10包括第一镜头部件11和第二镜头部件12，所述第一镜头部件11和第二镜头部件12构成一个完整的光学系统，即所述第一镜头部件11和第二镜头部件12组合成的光学系统能够在所述感光组件上清晰成像。所述第一镜头部件11通过一粘接件20(将在后文中详细描述)与所述第二镜头部件12粘接在一起。优选地，所述第一镜头部件11粘接固定于所述第二镜头部件12的入光侧，即所述第一镜头部件11靠近于所述摄像模组的物侧，所述第二镜头部件12靠近于所述摄像模组的像侧。在图1中，入光侧位于上方，出光侧位于下方，因此第一镜头部件11粘接固定于所述第二镜头部件12的上方。图2示出了本申请一个实施例的摄像模组的纵向剖面示意图。参考图2，摄像模组100包括光学镜头10和感光组件30，所述光学镜头10被保持于所述感光组件的感光路径上，使得所述感光组件可以接收从所述光学镜头10投射出的光线以进行成像。
进一步地，在本申请的一些实施例中，所述第一透镜包括光学有效区和围绕在所述光学有效区周围的结构区，所述粘结件粘结所述第一透镜的所述结构区的底面和所述第二镜筒的顶面。为便于描述，将所述第一透镜的底面、所述第二镜筒的顶面、最接近物方的所述第二透镜的顶面以及所述粘结件所构成的腔体称为第一腔体。其中，所述粘结件的所述缺口构成使所述第一腔体与外界气体连通的逃气通道。本实施例中，在所述第一胶水完全固化后，所述缺口不使用填充物堵塞，以保持所述第一腔体与外界的气体连通。下面结合图1进行描述。由于所述结构区通常位于透镜的边缘区域，因此下述实施例中结构区可以被称为外缘部。仍然参考图1，在本申请的一些实施例中，所述第一镜头部件11包括第一透镜111和第一镜筒112，所述第一透镜111容纳和安装于所述第一镜筒112中，所述第一透镜111在中央处具有在平面图中呈圆形的凸出部1111以进行光学成像，并且在外周处具有平台的外缘部1112。在成像过程中，所述第一透镜111的凸出部1111为能够使得光线透过进而成像的光学区，而外 缘部1112为结构区，所述结构区围绕所述光学区。应可以理解，在本申请的其他实施例中，所述第一镜头部件11可被实施为“裸透镜”，其仅包括一片所述第一透镜111。与所述第一透镜111的结构相对应地，所述第一镜筒112包括第一横向延伸部分1121和第一纵向延伸部分1122，所述第一透镜111被容纳于所述第一横向延伸部分1121与所述第一纵向延伸部分1122形成的容纳空间中。值得一提的是，在本申请一个实施例中，第一横向延伸部分1121与所述第一纵向延伸部分1122可以通过注塑等工艺一体成型(即，所述第一镜筒112为一体成型的部件)；或者，所述第一横向延伸部分1121和所述第一纵向延伸部分1122可以各自单独成型然后再组装在一起构成所述的第一镜筒112。所述第一横向延伸部分1121自所述第一镜筒112的顶部向内延伸，所述第一横向延伸部分1121具有一沿入射光方向内径逐渐缩小的内侧面，所述第一镜片的凸出部1111容置于所述第一横向延伸部分1121的内侧面形成的容纳空间内，为光线的入射提供充足的空间，并且，所述第一横向延伸部分1121的内侧面能够进一步减少侧面杂光的产生。从光线入射方向看，所述第一横向延伸部分1121遮挡所述第一透镜111的外缘部1112，和所述第一透镜111的凸出部1111的至少一部分。本实施例中，向内指朝向光轴的方向；向外指远离光轴的方向。所述第一横向延伸部分1121设置于所述第一透镜111的外缘部1112的上方，并且，所述第一横向延伸部分1121被设置于所述第一透镜111的上表面的上方，且所述第一横向延伸部分1121的底面与所述第一透镜111的外缘部1112的上表面之间存在气隙(即所述第一横向延伸部分1121的底面与第一透镜111的外缘部1112的上表面之间不互相承靠，二者之间不填充胶水，从而保留空气间隙)，以有效地降低所述第一镜筒112的状态改变对所述第一光学镜片的状态造成影响。例如：当所述第一镜筒112因外力产生位移或形变时，其不会对所述第一透镜111的状态(包括其位置和形状)造成直接影响，以保护所述第一透镜111不直接受外力的影响或收到所述第一镜筒112的间接影响，以提高所述光学透镜的可靠性。在本申请实施例中，所述第一镜筒112的第一横向延伸部分1121与所述第一透镜111的上表面之间的间隙大小范围为5μm-10μm。所述第一纵向延伸部分1122自所述第一镜筒112的底部向下延伸，所述第一纵向延伸部分1122为环状结构，并固定于所述第二镜头部件12的上方。
所述光学镜头10直接影响所述摄像模组100的成像品质。在多群组镜头中，不同镜头部件之间使用粘接件20连接，因此往往需要对所述光学镜头10 进行烘烤以使所述粘接件20固化从而实现连接。在组装过程中，为了使得所述第一透镜111和所述第二镜头部件12可靠地连接在一起，需要在所述第一透镜111与所述第二镜筒121之间设置粘接件20。所述粘接件20用于在固化后支撑所述第一透镜111和第二镜头部件12，并使二者间的相对位置保持在主动校准所确定的相对位置。较佳地，所述粘接件20的材质为UV热固胶，其可以通过光照进行预固化，然后再通过烘烤实现完全固化。而由于所述第一镜头部件11和所述第二镜头部件12之间的空气在烘烤时会导致气体膨胀，膨胀的气体会对所述第一镜头部件11和所述第二镜头部件12进行冲击，从而改变所述第一镜头部件11和所述第二镜头部件12的相对位置，造成光线性能下降。因此需要设置逃气通道40(可参考图3，图3示出了本申请一个实施例中的第二镜头部件在俯视角度下的示意图，该图中示出了在第二镜筒顶面点胶形成不封闭圆环形的粘结件)。逃气通道40能够将所述光学镜头10内的空气与外界连通，在烘烤时可以使得所述膨胀的气体逃出，以避免该膨胀气体对毗邻的所述第一镜头部件11和所述第二镜头部件12形成过大的压力，从而导致所述第一透镜111与所述第二镜筒121的相对位置发生偏移或光学元件(例如第一透镜或第二透镜)的光学有效区发生形变，进而影响光学性能。本实施例中，在垂直于所述光轴的投影面上，所述粘结件构成具有至少两个缺口的圆环形，所述至少两个缺口均匀地分布在该粘结件所在的圆环上。并且，所述缺口在所述圆环的周向上的弧角γ为10°～15°。如前文所述，本案发明人深入研究发现，这一大小的缺口，可以使得镜头组装的过程能力指数(CPK)高、实际量产良率高。一方面，该大小的缺口可以允许第一胶材加热固化过程中所产生的膨胀气体快速排出，避免该膨胀气体在镜头内部堆积而在局部区域对第一透镜、第二透镜以及第二镜筒等部件形成过大的压力，进而避免第一透镜、第二透镜的面型改变或二者相对位置发生偏离。另一方面，上述缺口也不会过大，结合圆环形的第一胶水点胶布置方式，使得本实施例的粘结件具有较好的粘结力，可承受光学镜头在测试或使用过程中出现的高低温冲击，避免出现脱胶现象。
具体来说，发明人对粘接件20的设置方式进行了改进。在本申请的一实施例中，所述粘接件20可以由3个弧形粘结区段构成。相应的，所述逃气通道40的数量为3个，所述弧形粘结区段与所述逃气通道40间隔设置。从所述第一透镜111轴线的一侧看其平面，所述粘接件20呈三C型。所述逃气通道40的数量增加可以增加逃气量，有助于密闭空间内膨胀的气体快速逃出，以避免 对毗邻部件造成过大的作用，从而导致所述第一透镜111与所述第二镜筒121的相对位置发生偏移或光学系统部件发生形变。在高低温冲击下，玻璃材质的第一透镜111与塑料材质的第二镜筒121的涨缩形变会不同，进而会在所述第一透镜111与第二镜筒121之间形成应力，所述弧形粘接区段的数量增加可以将所述应力进行分散，分散后的所述应力会减小，不容易有脱胶的情况产生。另一方面，本实施例中，每个所述弧形粘结区段在所述圆环的周向上的弧角θ至少为75°，这样每个所述弧形粘结区段均具有较大的粘结面积，有助于提升粘结件的结构强度和增加其粘结力，以便粘结件稳定可靠地支撑第一镜头部件和第二镜头部件，使得二者长期维持在主动校准所确定的相对位置。
更进一步地，图4示出了本申请另一个实施例中的第二镜头部件在俯视角度下的示意图。结合参考图1、图2和图4，在本申请的另一实施例中，所述粘接件20可以由4个弧形粘结区段构成。对于任意一个所述弧形粘结区段，其在所述圆环的周向上的弧角θ为75°～80°(可参考图5，图5示出了俯视角度下粘结件的缺口和弧形粘结区段的弧角)。在俯视角度下，每个所述粘结区段均呈扇环形。所述4个弧形粘结区段关于所述第一透镜111可以轴对称地设置，在垂直于所述第一透镜111光轴的投影面上，所述4个弧形粘接区段呈中心旋转对称状态。所述粘接件20呈4个C型，所述粘接件20的连线为一圆环形。在垂直于所述第一透镜111轴线的方向上看，所述4个逃气通道40关于所述第一透镜111的光轴呈中心对称。所述粘接件20包括第一粘接件21、第二粘接件22、第三粘接件23和第四粘接件24，所述第一粘接件21与所述第二粘接件22沿所述第一透镜111的轴线对称设置，所述第三粘接件23与所述第四粘接件24沿所述第一透镜111的轴线对称设置。所述第一粘接件21、第二粘接件22、第三粘接件23和第四粘接件24沿所述第一透镜111和所述第二镜筒121的周向上设置，且分布在同一圆周上。所述4个逃气通道40的设置可以增加逃气量，有助于密闭空间内膨胀的气体快速逃出，以避免对毗邻部件造成过大的作用，从而导致所述第一透镜111与所述第二镜筒121的相对位置发生偏移或光学系统部件发生形变。在高低温冲击下，玻璃材质的第一透镜111与塑料材质的第二镜筒121的涨缩形变会不同，进而会在所述第一透镜111与第二镜筒121之间形成应力，所述4个粘接件20和4个逃气通道40的设置可以将所述应力进行分散，分散后的所述应力会减小，不容易有脱胶的情况产生。并且，所述4个弧形粘接区段关于所述第一透镜111的轴线对称设置，可以使得所述第一透 镜111和所述第二镜筒121之间的应力对称分布，所述第一透镜111和所述第二镜筒121在各自的周向上四处均匀受力，避免出现所述第一透镜111和所述第二镜头相对位置出现偏移的问题。另一方面，本实施例中，每个所述弧形粘结区段在所述圆环的周向上的弧角θ至少为75°，这样每个所述弧形粘结区段均具有较大的粘结面积，有助于提升粘结件的结构强度和增加其粘结力，以便粘结件稳定可靠地支撑第一镜头部件和第二镜头部件，使得二者长期维持在主动校准所确定的相对位置。
进一步地，在本申请的一些实施例中，所述第一透镜111的材质可以是树脂。树脂镜片与第二镜筒121的材质(例如塑料材质)的热膨胀系数(CTE)较为接近(相比玻璃镜片而言)，因此在高低温冲击下，第一透镜111的形变量与塑料材质的第二镜筒121的形变量较为接近，所述第一透镜111与所述第二镜筒121的相对位置发生偏移的偏移量相对较小。
在本申请的另一些实施例中，第一透镜111的材质可以是玻璃。玻璃镜片具有高透射率、高折射率、低像散等优势，有利于提升镜头的成像品质，并降低镜头高度。玻璃镜片的具体制造工艺可以是模造玻璃工艺或者WLG晶圆级玻璃技术。然而，当所述第一透镜111的材质为玻璃镜片时，玻璃材质与所述第二镜筒121的塑料材质的热膨胀系数(CTE)不同，在高低温冲击下，玻璃材质的第一透镜111的形变量与塑料材质的第二镜筒121以及胶水的形变量不同，因此可能会造成所述第一透镜111与所述第二镜筒121的相对位置发生偏移，甚至玻璃材质的第一透镜111在抵抗温度变化过程中还有可能出现碎裂现象。发明人研究发现，在高低温冲击下，玻璃材质的第一透镜111与塑料材质的第二镜筒121的涨缩形变不同，进而会在所述第一透镜111与第二镜筒121之间形成应力，而应力集中的部位处，所述第一透镜111、第二镜筒121容易与所述粘接件20发生分离，即造成脱胶问题(指所述粘接件20脱离和断裂，即造成脱胶或断胶)。因此，在粘结件20上设置数目较多(例如4个)的缺口可以更好地适配第一透镜111为玻璃镜片的情形。
进一步地，本申请的一些实施例中，所述粘接件20的厚度范围为30um-100um，优选的，所述粘接件20的平均厚度为60um。所述厚度为粘接件20沿所述第一透镜111的轴线(即光轴)方向的尺寸，图12示出了第一透镜和第二镜头部件之间的间隙及粘结件的厚度。参考图12，粘接件20的厚度就是所述粘接件20的顶面与其底面之间的距离H，由于所述粘接件20的顶面与 所述第一透镜111的底面粘接，所述粘接件20的底面与所述第二镜筒121的顶面粘接，所述厚度也可以称为所述第一透镜111的底面与所述第二镜筒121顶面之间的高度，或者说所述第一透镜111的底面与所述第二镜筒121的顶面之间的间隙高度。在画胶阶段，各个粘结区段所对应的第一胶水的画胶厚度可以是一致的，这样在粘结件20固化后，各个粘结区段的抗剪能力较为接近。然而，需要注意，当第一镜头部件和第二镜头部件经主动校准后粘结时，由于主动校准过程可能为提升成像品质而调整第一透镜相对于第二镜筒121的倾角，因此最终状态下的各个粘结区段的厚度可能会有所不同。另一方面，本实施例中，每个所述弧形粘结区段在所述圆环的周向上的弧角θ至少为75°，这样每个所述弧形粘结区段均具有较大的粘结面积，有助于提升粘结件的结构强度和增加其粘结力，以便粘结件稳定可靠地支撑第一镜头部件和第二镜头部件，使得二者长期维持在主动校准所确定的相对位置。
进一步地，本申请的一些实施例中，所述粘结件20的各个粘结区段的宽度可以是相同。该宽度是指俯视角度下的宽度，即粘结件20所在圆环的径向方向上的尺寸。所述粘结件20可以包括第一粘接区段21、第二粘接区段22、第三粘接区段23和第四粘接区段24，第一粘接区段21、第二粘接区段22、第三粘接区段23和第四粘接区段24的宽度可以完全相同。各粘结区段的宽度范围为200um至300um。优选地，所述粘接区段的宽度可以是260um。
进一步地，本申请的一些实施例中，所述粘接件20设置于所述第一透镜111的外缘部1112的底面与所述第二镜筒121的顶面之间，所述第二镜筒121的顶面靠近光轴的一侧设置有一安全槽，所述安全槽设置于所述粘接件20的内侧。所述粘接件20的最外侧不超过所述第一透镜111的外缘部1112最大外径，所述粘接件20的最内侧不超过所述安全槽，所述粘接件20的宽度限制于所述第一透镜111的外缘部1112最大外径与所述安全槽之间。所述安全槽可以为一凹槽，以防止形成所述粘接件20的第一胶水外溢。
进一步地，在实际量产产品中，有些生产方式制造的透镜存在剪口，即俯视角度下透镜并非规整的圆形，而是呈“D”形。这是由于透镜在模塑或注塑成型过程中，成型腔需要保留至少一个注入液态成型材料(例如液态树脂)的入口，成型后该入口处将形成一个凸起部，将该凸起部切割去除，则透镜呈“D”形状态。图13示出了一个具有剪口的透镜的示例。参考图13，该透镜的外缘部1112具有剪口1113。发明人研究发现，对于此类呈“D”形状态的第一透镜， 其靠近剪口(即切割面处)的区域的应力相对较大，因此，对于粘结件20，可以对靠近剪口的弧形粘结区段进行改进，例如可以将靠近剪口的弧形粘结区段的宽度减小，从而靠近剪口处粘接区段产生的应力较小，从而粘接区段对剪口处的应力影响较小。也就是说，在粘结件20中，最接近所述剪口的弧形粘结区段的宽度可以小于其它弧形粘结区段的宽度。
在本申请的一些实施例中，俯视角度下，所述粘接件20的两端与所述第一透镜111的轴线形成一θ角，所述θ角的范围为：75°≤θ≤80°。当所述θ角处于75°至80°的范围时，不仅可以保证在所述粘接件20固化后不会将所述逃气通道40堵塞，而且能够实现所述粘接件20的最大使用量。当所述粘接件20的胶水量足够大，从而为所述第一透镜111与所述第二镜筒121之间提供足够的粘结力，从而保证所述第一透镜111与所述第二镜筒121之间稳定连接，从而避免了出现所述第一透镜111和所述第二镜筒121相对位置出现偏移的问题，同时也避免了所述第一透镜111和所述第二镜筒121分离而导致的所述光学镜头10损坏。
在本申请的一些实施例中，所述粘结件20设置有4个逃气通道40，各逃气通道的大小、尺寸相同，使得所述第一透镜111和所述第二镜筒121在各自的周向上受力均匀，所述4个逃气通道40的设置可以将所述应力进行分散，分散后的所述应力会减小，以避免脱胶的情况产生。从所述第一透镜111轴线的一侧看其平面，所述逃气通道40的两端与所述第一透镜111的轴线形成一γ角，所述γ角的范围为：10°≤γ≤15°。当所述γ角处于10°至15°的范围时，所述粘接件20的第一胶水使用量可以实现优化，并且在所述粘接件20固化后不会将所述逃气通道40堵塞。也就是说，当所述γ角度小于10°时，由于所述逃气通道40的尺寸过小，所述粘接件20固化后会造成所述逃气通道40堵塞，进而造成所述第一透镜111与所述第二镜筒121内的空气在烘烤时因无法逃逸造成受热膨胀，严重影响主动校准后两群组之间相对位置精度；当所述γ角度大于15°时，则有可能会因为所述粘接件20的胶水量过少而造成粘结力不够，进而导致所述第一透镜111和所述第二镜筒121相对位置出现偏移的问题，更严重时，可能还会导致所述第一透镜111和所述第二镜筒121之间发生脱胶分离，使光学镜头10损坏。
进一步地，图6示出了本申请一个实施例中的具有排气结构的粘结件。参考图6，在本申请的一些实施例中，在所述粘结件20所在圆环的径向方向上， 所述逃气通道40包括入口段41、中间段42和出口段43，在所述圆环的周向方向上，入口段41的尺寸和出口段43的尺寸均大于中间段42的尺寸。换言之，所述逃气通道40的中间段尺寸小，两端开口的尺寸大，入口段41和出口段43均形成导引结构，利于膨胀的气体快速排除。
值得注意的是，现有技术中，点胶、粘合并固化后，粘结件通常需要密封，以防止灰尘或其他脏物从逃气通道40进入光学镜头10内部。然而，本申请的一些实施例中，在第一胶水完成点胶、粘合及固化后，粘结件20的逃气通道40不填充密封物，而是使该逃气通道40保持畅通。在光学镜头10组装完成后，通常还需要对所述光学镜头10进行高低温冲击、高温高湿等测试，而基于主动校准工艺的光学镜头中，粘结件承担了支撑两个(或更多)镜头部件的作用，它需要维持各镜头部件的相对位置，以使光学成像系统保持在主动校准所确定的状态。本申请发明人研究发现，对于基于主动校准的镜头(AOA镜头)，高低温冲击、高温高湿等测试过程中，镜头内气体在测试环境因素的影响向下，将对光学元件的相对位置和面型构成较为明显的影响。具体来说，在前述实施例中，所述第一透镜的底面、所述第二镜筒的顶面、最接近物方的所述第二透镜的顶面以及所述粘结件构成一第一腔体，所述粘结件的所述缺口构成使所述第一腔体与外界气体连通的逃气通道。如果直接在逃气通道填充密封物，那么在进行高低温冲击、高温高湿测试时，第一腔体内气体将因环境参数变化而快速膨胀或收缩，第一透镜、第二透镜和第二镜筒受到挤压，光学成像系统的光学性能劣化，进而导致量产良率下降，镜头组装的过程能力指数(CPK)下降。而保持逃气通道畅通，则所述光学镜头10内外(指第一腔体内外)的气压一致，从而避免由于气压差将所述光学镜头10挤压造成所述光学镜头10变形。
进一步地，图7示出了本申请一些实施例中的内外双层布胶的分体式镜头的剖面示意图。图8示出了图7的分体式镜头的布胶区域的局部放大示意图。参考图7和图8，同时结合参考图1，在本申请的一些实施例中，在所述粘接件20固化后，可以在粘结件20的外侧设置一补强胶水层(下文中简称为胶水层50)，所述胶水层50可以用于防止灰尘或其他脏物从逃气通道40进行光学镜头10内部，从而使逃气通道40可以不设置密封物。另一方面，所述胶水层50还可以进一步增加所述第一透镜111与所述第二镜筒121的连接强度(即起到补强作用)。具体地，所述胶水层50设置于所述粘接件20的外侧，所述胶水层50覆盖所述第一透镜111和所述第二镜筒121的至少一部分，所述胶水层50 与所述第一透镜111的外缘部1112的侧面粘接，并且所述胶水层50的高度不超过所述第一透镜111的外缘部1112的侧壁2/3的高度(即胶水层50布置在第一透镜结构区外侧面的2/3高度以下的区域)。在一些实施例中，所述胶水层50与所述第二镜筒121的顶面粘接。所述胶水层50可以使用相较于所述粘接件20弹性模量更低(或者说更软)的胶水。
当第一透镜111为在玻璃材质时，在第一透镜111的外周侧设置胶水层50，对镜头的成像品质及其长期使用的可靠性将有更加显著的效果。具体来说，由于玻璃材质与所述第二镜筒121的塑料材质的热膨胀系数(CTE)不同，在高低温冲击下，玻璃材质的第一透镜111与塑料材质的第二镜筒121的涨缩形变会不同，进而会在所述第一透镜111与第二镜筒121之间形成应力，而应力的存在可能会造成所述粘接件20脱离和断裂，即造成脱胶或断胶。所述胶水层50可以将所述应力分散，进而避免了所述粘接件20被破坏，也可以说，所述胶水层50可以对所述粘接件20提供保护。
进一步地，在本申请的一个实施例中，所述粘接件20通过点胶实现，所述胶水层50则通过喷胶实现。所述胶水层50可以与所述粘接件20相互接触也可以不接触，本申请对此不做限制。胶水层50和粘结件20可以使用同一材质的胶水实现。当然，二者也可以使用不同材质的胶水实现，其中，胶水层50的胶水的弹性模量可以低于粘结件20的第一胶水的弹性模量。
进一步地，本申请的一个实施例中，所述胶水层50可以环绕所述粘接件20，即在绕所述粘接件20的圆周方向上设置一整圈胶水层50，在俯视角度下，所述胶水层50呈一环形。由于在烘烤过程中，所述第一透镜111与所述第二镜筒121内的空气受热膨胀，膨胀后的气体会通过所述逃气通道40外溢，因此所述胶水层50上与逃气通道40相对的位置处会被所述气体冲击而产生一尖角形缺口(即第二缺口52，参考图9，图9示出了具有尖角形缺口的双层布胶的光学镜头的俯视示意图，该图中去除了第一镜头部件以便清楚显示胶水层50和粘结件20的形状)，并且所述尖角的尖端朝向远离所述轴线的方向，所述尖角将所述光学镜头10内部的空间与外界空间进行连通。换句话说，所述补强胶水层可以具有第二缺口，该第二缺口为尖角形。所述第二缺口是对胶水进行加热固化时在膨胀气体(指来自于所述粘结件和所述补强胶水层内部的膨胀气体)的冲击下形成，所述第二缺口的入口尺寸大于其出口尺寸，从而使第二缺口呈尖角形。其中所述第二缺口的入口位于靠近所述粘结件的一侧，所述第二缺口的 出口位于背离所述粘结件的一侧。具体来说，在粘结件20固化后，在第一粘结件20的周围布置第二胶水。在该布胶阶段，可以将第二胶水布置成封闭的圆环形。在在加热固化时，膨胀气体冲击第二胶水形成所述第二缺口52(参考图9)，并且所述第二缺口位于所述粘结件20的其中一个所述缺口的位置处。通常来说，第二胶水与粘结件20的外侧面之间会存在一定的气隙(需注意第二胶水可以接触粘结件20的外侧面，但二者之间往往仍然具有气隙)，在对第二胶水进行加热固化时，膨胀气体从粘结件20的各个逃气通道冲出，当其中一个逃气通道位置所对应的第二胶水被冲断时，气体将从该冲断处被排出，其它方位的逃气通道处的气压则快速降低，第二胶水的对应区段不再受到冲击，并保持原有形状实现完全固化。因此，这种方法制作的胶水层50通常只有一个第二缺口，且该第二缺口呈尖角形。这种尖角形的第二缺口既能保证镜头第一腔体(可参考前文描述)内的气体与外界连通，又能够很好地阻挡外界的灰尘(或其它微小颗粒)进入镜头内。在另一实施例中，在第二胶水的布胶阶段，第二胶水也可以直接设置一个第二缺口，该第二缺口的位置正对粘结件20的其中一个缺口，且该第二缺口的弧角可以小于粘结件20的缺口的弧角。这样，在第二胶水加热固化的过程中，膨胀气体也会一定程度地冲击第二胶水的第二缺口附近的区域，从而使第二缺口呈尖角形。
进一步地，图10示出了本申请另一实施例中的具有布胶缺口的光学镜头的俯视示意图，该图中去除了第一镜头部件以便清楚显示胶水层50和粘结件20的形状。参考图10，在本申请的另一些实施例中，所述胶水层50的上也可以在布胶阶段设置第三缺口作为逃气孔51，使得在所述第一透镜111与所述第二镜筒121内受热的膨胀空气可以通过所述逃气孔51直接逃出。例如，所述胶水层50上设置一个逃气孔51，所述胶水层50的逃气孔51与所述粘接件20的逃气通道40相对。在俯视角度下，所述胶水层50的逃气孔51所对应的弧角α可以与粘结件20的缺口的弧角γ的大小相同(可参考图11，图11示出了图10中的逃气孔的弧角α)，所述弧角α的范围为：10°≤α≤15°。当然，所述胶水层50的逃气孔51也可以不与所述粘接件20的逃气通道40相对，即所述逃气孔51与所述逃气通道40错位设置，这种设置方式可以进一步阻挡灰尘或其他脏物的进入。所述逃气孔51的数量可以大于1个，如2个、3个、4个等，本申请对此不做限制。
在本申请的一些实施例中，所述补强胶水层采用与所述粘结件相同的胶水制作，所述补强胶水层也以点胶的方式布置在所述第二镜筒的顶面，并且所述粘结件在其所在圆环的径向方向上的宽度大于所述补强胶水层在其所在圆环的径向方向上的宽度。
本申请的一些实施例中，所述光学镜头10是一种分体式镜头，在多群组镜头中，利用主动对准工艺，对光学系统部品制造公差/组装公差等进行误差补偿，从而提高整个光学系统的成像质量及量产良率。在进行组装时，将相邻的2个群组：第一镜头部件11和第二镜头部件12找到最优成像位置后，通过一粘接件20，将所述第一镜头部件11与所述第二镜头部件12通过粘接件20可靠地连接在一起。
具体地，在本申请的一实施例中，首先，提供一第一透镜111和一第二镜头部件12，其中，所述第二镜头部件12包括第二镜筒121和安装于所述第二镜筒121内的至少一第二透镜120；接着，预定位所述第一透镜111、所述第二镜头部件12和感光组件，以使得所述第一透镜111、所述至少一第二光学透镜和所述感光组件构成成像系统；然后，进行主动校准，即基于所述成像系统所采集的图像的成像质量，在多个维度调整所述第一透镜111与所述第二镜头部件12之间的相对位置关系。这里的多个维度可以是x、y、z这三个轴向和Rx、Ry、Rz这三个旋转方向，即6轴移动下的调整。当然，主动校准的维度也可以限制在上述6个维度中的部分维度中。例如主动校准可以限制在3个、4个或者5个维度上进行位置调整。实时主动调整第一镜头部件11和第二镜头部件12之间的相对位置，一次或多次调整后使所述光学镜头10的成像品质(主要包含峰值、场曲、像散等光学参数)达到目标值；进而，响应于所述成像系统所采集的图像的成像质量满足预设要求，固定所述第一透镜111与所述第二镜头部件12之间的相对位置关系；然后，安装所述第一镜筒112的第一纵向延伸部分1122于所述第二镜筒121的支撑部1211，以使得所述第一镜筒112被悬持地支撑于所述第二镜筒121且所述第一镜筒112遮覆所述第一透镜111的侧表面和其上表面的至少一部分。
在本申请的一个实施例中，在分体式镜头的组装过程中，可以先在第二镜筒121的顶面布置第一胶水，然后再将第一透镜111移动至第二镜头部件的上方并构成可成像的光学系统，再根据感光芯片的实际输出的成像数据对第一透镜111和第二镜头部件的相对位置进行调整(即主动校准)，获得优化的成像品 质后(即主动校准完成后)，可以通过光照(或其他手段)将第一胶水预固化(或称为临时固化)。预固化后，第一胶水可以在短期内支撑第一透镜111和第二镜头部件，以使二者的相对位置维持在主动校准所确定的相对位置。最后，可以将相对固定的第一透镜111和第二镜头部件的组合体进行烘烤，使所述第一胶水完全固化。
在本申请的另一个实施例中，在分体式镜头的组装过程中，可以先进行主动校准，记录下主动校准所确定的相对位置后，移开第一透镜111，然后再将第一胶水布置于第二镜筒的顶面，再将第一透镜111移回原位置(即所记录的主动校准所确定的相对位置)。接下来，通过光照(或其他手段)将第一胶水预固化(或称为临时固化)。预固化后，第一胶水可以在短期内支撑第一透镜111和第二镜头部件，以使二者的相对位置维持在主动校准所确定的相对位置。最后，可以将相对固定的第一透镜111和第二镜头部件的组合体进行烘烤，使所述第一胶水完全固化。
进一步地，在本申请的一个实施例中，在第一胶水完全固化后(即形成粘结件20后)，可以从外侧向所述第一透镜111的外侧面及第二镜筒121和第一透镜111之间的间隙喷胶，从而在所述粘结件20的外围布置补强胶水层50。该补强胶水层50可以仅通过UV光的照射固化，也可以先用UV光照射进行预固化，然后再进行烘烤固化。
进一步地，在本申请的一些实施例中，所述第一镜头部件的所述第一透镜的数目可以为一，即第一镜头部件所构成的群组可以只有一个透镜。此时夹具(或其它摄取机构，例如吸嘴)夹取单个镜头并调整其与第二镜头部件的相对位置，实现主动校准。待第一胶水预固化后，可将夹具松开，由预固化的胶水来支撑所述的第一透镜。然后再对镜头进行烘烤，使得第一胶水完全固化，构成所述的粘结件。
在本申请的另一些实施例中，所述第一镜头部件的所述第一透镜的数目为多个，多个所述的第一透镜互相嵌合组立为第一透镜组，或者通过WLG晶圆级工艺进行堆叠来将多个所述的第一透镜组立为第一透镜组。由于这些第一透镜已组立成第一透镜组，因此可以由夹具直接夹取进行移动。
进一步地，在本申请的一些实施例中，多个所述的第二透镜通过所述第二镜筒组立为第二透镜组。第二镜筒的内侧面可以具有多级台阶结构，在组立第二透镜组时，可以将第二镜筒倒置，然后由小至大地依次将各个第二透镜装入 第二镜筒，在第二镜筒的辅助支撑下将各个第二透镜之间的相对位置固定。具体来说，在一个实施例中，所述第二镜头部件12包括第二透镜120和第二镜筒121，所述第二透镜120容纳和安装于所述第二镜筒121中，所述第二透镜120的数量并不为本申请所局限，其可以是4片、5片、6片、7片或者更多。所述第二镜筒121包括第二横向延伸部分1212，所述第二横向延伸部分1212自所述第二镜筒121的顶部向内延伸，并且，所述第二横向延伸部分1212的至少一部分位于所述第一镜头部件11的外缘部1112的下方。所述镜筒的顶部具有一围绕所述第二镜筒121侧壁的环状分布的凹槽，所述凹槽形成环状的支撑部1211并围绕于所述第二镜筒121的侧面，所述支撑部1211位于所述第二横向延伸部分1212的外侧，即支撑部1211位于远离所述光轴的一侧。所述支撑部1211的顶面可以与所述光轴呈垂直或大致垂直设置，当然，在本申请的其他实施例中，所述支撑部1211的顶面也可以与所述光轴呈倾斜设置。在本申请的实施例中，所述环状分布的支撑部1211可以是一个支撑部1211呈环状围绕于所述第二镜筒121的侧面，也可以是多个支撑部1211呈环状间隔分布于所述第二镜筒121的侧面，本申请对此不做限制。在本申请中，所述支撑部1211的顶面可以低于所述第二镜筒121的顶面，所述支撑部1211的顶面也可以与所述第二镜筒121的顶面齐平，所述支撑部1211的顶面也可以高于所述第二镜筒121的顶面。优选地，所述支撑部1211的顶面低于所述第二镜筒121的顶面，即所述支撑部1211的高度低于所述第二镜筒121上表面的高度，从而当所述第一镜筒112被设置于所述支撑部1211时，所述第一镜筒112能够更为邻近地悬持于所述第一透镜111的上表面，以缩减所述光学镜头10的整体高度。
在上述实施例中，所述第一镜头部件11与第二镜头部件12可以沿光轴方向依次设置，即所述第一镜头部件11固定于所述第二镜头部件12的入光侧。具体地，所述第一镜头部件11的第一透镜111固定于所述第二镜头部件12的第二镜筒121，所述第一镜头部件11的第一镜筒112固定于所述第二镜头部件12的第二镜筒121。也就是说，所述第一透镜111与所述第一镜筒112分别固定连接于所述第二镜筒121，通过这样的方式，使得所述第一镜筒112被悬持地支撑于所述第一透镜111的上方。所述第一镜筒112与所述第一透镜111之间不发生接触，即所述第一镜筒112与所述第一透镜111均通过所述第二镜筒121进行支撑，而所述第一透镜111与第一镜筒112之间不发生支撑关系。
优选地，所述第一透镜111的外缘部1112的固定于所述第二镜筒121的第二横向延伸部分1212，即所述第一透镜111的外缘部下表面通过一粘接件20固定于所述第二横向延伸部分1212的上表面。所述第一镜筒112的第一纵向延伸部分1122固定于所述第二镜筒121的支撑部1211，所述第一纵向延伸部分1122看作是所述第一镜筒112的底部向下延伸的凸起，所述支撑部1211看作是所述第二镜筒121的顶部向下形成的凹槽，通过凸起与凹槽之间的配合使得所述第一镜筒112的第一纵向延伸部分1122被固定于所述第二镜筒121的支撑部1211上。在本申请实施例中，所述第一镜筒112的第一纵向延伸部分1122与所述第二镜筒121的支撑部1211之间可以通过黏着剂进行固定，其中，所述黏着剂可以是适于紫外光照射固化的黏着剂；或者是适于通过可见光照射固化的黏着剂；或者是适于通过加热固化的黏着剂；或者是适于通过湿气接触固化的黏着剂，其选型并不为本申请所局限。当然，对于本领域技术人员来说，除了所述黏着剂，也可以在所述第一纵向延伸部和支撑部1211之间通过螺纹或卡扣的方式将二者进行固定，以进一步加强所述第一镜筒112与所述第二镜筒121之间的结合了，进而降低所述第一镜筒112脱落的风险。
应可以理解，在本申请的一些实施例中，所述第一镜筒112的支撑着力点完全依靠于所述的第二镜筒121的支撑部1211，而所述第一透镜111因与所述第一镜筒112在结构配置上相互独立而不为所述第一镜筒112的安装提供着力点。
进一步地，根据本申请的一些实施例，还示例性地提供了基于上述分体式光学镜头的摄像模组。参考图1和图2，摄像模组可以包括感光组件30和上述分体式光学镜头(即光学镜头10)。进一步地，图14示出了本申请一个实施例中的感光组件的剖面示意图。参考图14，所述感光组件30可以包括线路板31、感光芯片32、电子元件33、底座34及滤光元件35。所述感光芯片32设置于所述线路板31，并电连接于所述线路板31。所述底座34设置于所述线路板31，并位于所述感光芯片32的周侧，所述滤光元件35被安装于所述底座34上以被保持于所述感光芯片32的感光路径上。所述感光芯片32包括一感光区321，和围绕于所述感光区321的非感光区322。
在本申请的一个示例中，所述感光芯片32被安装于所述线路板31的上表面，并通过打金线的方式电连接于所述线路板31。当然，在本申请的其他示例实施例中，所述感光芯片32还能以其他方式被设置于所述线路板31和/或其他 方式电连接于所述线路板31，例如，以芯片倒装的方式贴附于所述线路板31的下表面，对此，并不为本申请所局限并限于此实施例。应可以理解，在本申请的一些实施例中，所述感光芯片32的感光路径形成所述感光组件30的感光路径。
在本申请的一些实施例中，所述底座34可以被设置于所述线路板31上以封装位于所述线路板31上的电子器件且用于支撑其他部件。在本申请一个具体的示例中，所述基座被实施为单独成型的塑料支架，其通过黏着剂附着于所述线路板31的表面，并用于支撑其他部件。当然，在本申请的其他示例实施例中，所述基座还能以其他方式形成于所述线路板31，例如，所述基座被实施为模塑基座，其通过模塑工艺一体成型于所述线路板31的预设位置，对此，并不为本申请所局限并限于此实施例。
在本申请的一些实施例中，所述滤光元件35可以被保持于所述感光芯片32的感光路径上，用于对进入所述感光芯片32的成像光线进行过滤。在一个具体的示例中，所述滤光元件35被安装于所述底座34上且对应于所述感光芯片32的至少感光区域，通过这样的方式，所述滤光元件35被保持于所述感光芯片32的感光路径上。值得一提的是，在本申请的其他示例实施例中，所述滤光元件35还能够以其他方式被安装于所述底座34上，例如，先在所述底座34上设置滤光元件35支架，进而将所述滤光元件35安装在所述滤光元件35支架上，也就是，在该示例中，所述滤光元件35可通过其他支撑件被间接地安装于所述底座34上。并且，在本申请的其他示例实施例中，所述滤光元件35还能够被安装于所述摄像模组100的其他位置，例如，所述滤光元件35形成于所述光学镜头10内(例如，作为一层滤光膜附着于所述光学镜头10的某片光学透镜的表面)，对此，并不为本申请所局限并限于此实施例。
参考图2，在本申请的另一些实施例中，所述光学镜头10直接安置于所述感光组件30的顶面，以固定设置于所述感光组件30的感光路径上。在本申请的另一示例中，所述光学镜头10通过一镜座13安置于所述感光组件30的顶面，所述镜座13中间具有一通孔，被所述光学镜头10折射的光线能够通过该通孔入射至所述感光组件30。在本申请的另一示例中，所述光学镜头10通过一镜头驱动部分14(即光学致动器)安置于所述感光组件30的顶面，所述光学镜头10设置于所述镜头驱动部分14的安置空间内，并且所述镜头驱动部分 14能够驱动所述光学镜头10移动，以实现光学对焦和/或光学防抖功能。在本申请的实施例中，所述镜头驱动部分14可以是音圈镜头驱动部分、压电镜头驱动部分、SMA(形状记忆合金，Shape Memory Alloy)镜头驱动部分等类型的驱动镜头驱动部分。所述镜头驱动部分14可以驱动所述光学镜头10移动，以实现光学对焦、光学变焦和/或光学防抖功能。
以上描述仅为本申请的较佳实施方式以及对所运用技术原理的说明。本领域技术人员应当理解，本申请中所涉及的发明范围，并不限于上述技术特征的特定组合而成的技术方案，同时也应涵盖在不脱离所述发明构思的情况下，由上述技术特征或其等同特征进行任意组合而形成的其它技术方案。例如上述特征与本申请中公开的(但不限于)具有类似功能的技术特征进行互相替换而形成的技术方案。

Claims (18)

  1. 一种光学镜头，其特征在于，包括：
    第一镜头部件，其包括第一透镜；
    第二镜头部件，其包括第二镜筒和安装于第二镜筒内的至少一个第二透镜，所述第一镜头部件和所述第二镜头部件同轴布置；以及
    粘结件，其由第一胶水固化后形成，所述第一胶水布置在所述第二镜筒与所述第一透镜之间，并在固化后支撑所述第一透镜和所述第二镜头部件；
    其中，在垂直于所述光学镜头的光轴的投影面上，所述粘结件构成具有至少三个缺口的圆环形；每个所述缺口在所述粘结件所在的圆环上所对应的圆心角γ为10°～15°。
  2. 根据权利要求1所述的光学镜头，其特征在于，所述粘结件包括多个弧形粘结区段构成，任意两个所述弧形粘结区段均由所述缺口隔开，并且任意一个所述弧形粘结区段在所述圆环上所对应的圆心角θ至少为75°。
  3. 根据权利要求1所述的光学镜头，其特征在于，所述第一透镜包括光学有效区和围绕在所述光学有效区周围的结构区，所述粘结件粘结所述第一透镜的所述结构区的底面和所述第二镜筒的顶面；所述第一透镜的底面、所述第二镜筒的顶面、最接近物方的所述第二透镜的顶面以及所述粘结件构成一第一腔体，所述粘结件的所述缺口构成使所述第一腔体与外界气体连通的逃气通道。
  4. 根据权利要求3所述的光学镜头，其特征在于，在所述第一胶水完全固化后，所述缺口不设置填充物堵塞，以保持所述第一腔体与外界的气体连通。
  5. 根据权利要求3所述的光学镜头，其特征在于，所述第一镜头部件还包括第一镜筒，所述第一透镜位于所述第一镜筒内，但所述第一镜筒内侧面与所述第一透镜的外表面之间不互相承靠；所述第一镜筒包括第一侧壁和自所述第一侧壁顶部向内横向延伸而形成的第一顶盖，所述第一顶盖中央形成通光孔；所述第一侧壁位于所述第一透镜的所述结构区的外侧面的外侧，所述第一顶盖位于所述第一透镜的所述结构区的顶面的上方,所述第一顶盖的下表面与所述 第一透镜的所述结构区的上表面之间具有5μm-10μm的间隙；所述第一镜筒的所述第一侧壁的底面通过胶材直接粘结所述第二镜筒；多个所述的第二透镜通过所述第二镜筒组立为第二透镜组。
  6. 根据权利要求2所述的光学镜头，其特征在于，所述粘结件具有四个所述缺口和四个所述弧形粘结区段，对于任意一个所述弧形粘结区段，其对应的圆心角θ为75°～80°。
  7. 根据权利要求2所述的光学镜头，其特征在于，所述粘结件具有三个所述缺口和三个所述弧形粘结区段。
  8. 根据权利要求1-6中任意一项所述的光学镜头，其特征在于，所述第一透镜为玻璃材质的镜片，所述第二镜筒为塑料材质的镜筒。
  9. 根据权利要求1-6中任意一项所述的光学镜头，其特征在于，所述至少三个缺口均匀地分布在所述粘结件所在的圆环上。
  10. 根据权利要求1所述的光学镜头，其特征在于，所述第一透镜与所述第二镜头部件之间还设置有补强胶水层，所述补强胶水层设置在所述粘结件的外围，并且所述补强胶水层呈不封闭的圆环形。
  11. 根据权利要求10所述的光学镜头，其特征在于，所述补强胶水层采用弹性模量小于所述粘结件的胶水制作。
  12. 根据权利要求10所述的光学镜头，其特征在于，所述第一胶材以画胶的方式布置在所述第二镜筒的顶面，经加热固化后形成所述粘结件；所述补强胶水层通过从所述第一透镜的外侧面布置所述粘结件的外围。
  13. 根据权利要求12所述的光学镜头，其特征在于，所述第一透镜的外侧面被所述补强胶水层部分覆盖。
  14. 根据权利要求12所述的光学镜头，其特征在于，所述补强胶水层形成具有第二缺口的圆环形，其中，在布胶阶段将第二胶水布置成封闭的圆环形，在在加热固化时由膨胀气体冲击下形成所述第二缺口，所述第二缺口位于所述粘结件的其中一个所述缺口的位置处；所述第二缺口的入口尺寸大于其出口尺寸，其中所述第二缺口的入口位于靠近所述粘结件的一侧，所述第二缺口的出口位于背离所述粘结件的一侧。
  15. 根据权利要求12所述的光学镜头，其特征在于，所述补强胶水层由单条连续的胶水段形成，并且所述补强胶水层设置单个第二缺口，所述第二缺口与所述粘结件的其中一个所述缺口设置在同一方位。
  16. 根据权利要求12所述的光学镜头，其特征在于，所述补强胶水层的第二缺口的位置与所述粘结件的所述缺口的位置错开。
  17. 一种摄像模组，其特征在于，包括：
    感光组件，其具有感光芯片；和
    权利要求1-16中任意一项所述的光学镜头；所述光学镜头直接或间接地安装于所述感光组件，使得所述感光芯片适于接收穿过所述第一透镜、和所述至少一个第二透镜的光线并输出成像数据。
  18. 根据权利要求17所述的摄像模组，其特征在于，还包括光学致动器，所述光学镜头安装于所述光学致动器，并且通过所述光学致动器间接地安装于所述感光组件。
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TWM404388U (en) * 2010-12-14 2011-05-21 Newmax Technology Co Ltd Lens degassing structure (I)
JP2014102363A (ja) * 2012-11-20 2014-06-05 Hoya Corp レンズ保持枠及びこれを備えたレンズ鏡筒
CN208239703U (zh) * 2018-03-16 2018-12-14 宁波舜宇光电信息有限公司 光学镜头和摄像模组
CN112649933A (zh) * 2018-04-28 2021-04-13 宁波舜宇光电信息有限公司 光学镜头、摄像模组及其组装方法
CN214151180U (zh) * 2020-12-30 2021-09-07 江西晶超光学有限公司 多群组镜头及摄像模组

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TWM404388U (en) * 2010-12-14 2011-05-21 Newmax Technology Co Ltd Lens degassing structure (I)
JP2014102363A (ja) * 2012-11-20 2014-06-05 Hoya Corp レンズ保持枠及びこれを備えたレンズ鏡筒
CN208239703U (zh) * 2018-03-16 2018-12-14 宁波舜宇光电信息有限公司 光学镜头和摄像模组
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