Split lens

Abstract

The present invention provides a split lens, wherein the split lens includes a first lens assembly and a second lens assembly, wherein the first lens assembly includes at least one upper group lens, an inner black object, and an outer black object, and the at least one upper group lens is fixed to the second lens assembly by the inner black object, and the height of an upper end surface of the inner black object is lower than the height of a top end of the upper group lens, wherein the outer black object covers the inner black object and fixes the inner black object to the second lens assembly by the outer black object.

Description

Technical Field

[0001] The present invention relates to the field of optical lenses, and in particular to a split lens. Background Art

[0002] As consumer spending rises, so do their expectations for mobile phone camera functionality. However, consumers also prefer more compact electronic devices. The current trend of mobile phones, such as those with high screen-to-body ratios and minimally protruding back covers, poses new challenges to mobile phone camera modules. To achieve superior camera performance, zoom, image stabilization, high pixel count, large aperture, and small size have become irreversible trends in camera module development, leading to increasing consumer expectations for image quality.

[0003] Existing split lens solutions compensate for errors caused by lens molding and assembly by actively calibrating the two lens components before assembly. Therefore, split lens solutions can improve the assembly yield of multiple lenses (7P or more), improve the assembly yield of periscope lenses, and achieve high-yield large-aperture lens assembly. Objectively, split lenses require the assembly of multiple groups of lens components, and sometimes do not meet reliability requirements compared to integrated solutions. Therefore, split lens solutions sometimes require targeted improvements to the reliability of the split lenses. Generally, industry reliability tests for lenses include mechanical shock, drop tests, and other tests, as well as temperature tests such as high and low temperature shock and high temperature cycling. As the industry upgrades, these test items will become increasingly stringent to ensure the high yield and reliability of the manufactured products. Sometimes, split lenses may easily fall off and experience performance degradation after reliability testing due to unreasonable lens structural design.

[0004] It is worth mentioning that glass lenses themselves have a relatively high light transmittance and a relatively large refractive index. Compared with plastic lenses, glass lenses can reduce the height of the overall lens. Therefore, lenses with glass lenses themselves have certain advantages and can meet the needs of consumers. However, due to the density and weight of glass itself, all-glass lenses are not the mainstream mobile phone lens solution. For split lenses, the upper group of lenses can be set to glass material, thereby reducing the height of the overall lens. Split lenses can also compensate for defects such as eccentricity and tilt of glass lenses through active calibration.

[0005] On the other hand, the manufacturing process of glass lenses involves molding glass preforms, which require maintaining a relatively high temperature while the mold presses the glass preform into shape. Therefore, if the structural area of ​​the glass lens is too large relative to the optical area, that is, if the structural area that needs to be pressed is too large, it can easily cause the glass lens to break after cooling. Therefore, the structural area of ​​glass lenses is usually not very large. The structural area of ​​a typical mobile phone glass lens is generally around 0.3-0.6mm, while the structural area of ​​the same plastic lens can be 0.8-1.5mm. Therefore, when the structural area is shorter, glue is applied to the sidewalls of the lens to compensate for the bonding strength.

[0006] On the other hand, during various temperature-related reliability tests, as the external temperature rises, the lens expands overall. Existing techniques involve applying glue to the outside and bottom of the lens before securing it to the lower lens group. This glue, lens barrel, and lens dimensions all change. However, the glue itself typically has a CTE value of 90-110. Glass lenses have a CTE of approximately 10, plastic lenses have a CTE of approximately 60, and the lower lens group's black material has a CTE of approximately 80. Once exposed to high temperatures, the glue material experiences the greatest deformation. If the upper lens group is made of glass, due to the relatively low CTE value of glass itself, in a high-temperature environment, such as 85 degrees Celsius, the lens deformation is far less than that of the glue material. This can cause the glue material's fixing position to shift from that of the lower lens group, creating a risk of the lens falling off. When the upper group of lenses is made of glass lenses, the bonding area will be smaller. The existing structure is to set glue on the side wall of the lens to compensate for the bonding strength when the structural area is shorter. However, after the side glue compensation, the change in the side size of the glue may cause the entire lens to be pulled by the glue, resulting in the lens falling off, or the lens position may change, causing eccentricity and other risks that affect optical performance. The risk of lens falling off caused by temperature changes will also increase.

[0007] In addition, the height of the lens also affects the thinness of electronic devices. The number of lenses and the structure of the lens are the main factors affecting the height of the lens. Summary of the Invention

[0008] A major advantage of the present invention is providing a split lens, wherein the split lens includes at least one upper lens group and an inner black object that secures the upper lens group, wherein the inner black object is lower than the height of the upper lens group, thereby reducing the overall height of the split lens. Another advantage of the present invention is providing a split lens, wherein the split lens further includes an outer black object, wherein the outer black object covers the upper end of the inner black object and is slightly higher than the height of the upper lens group to reduce the interference of the external environment on the upper lens group.

[0009] Another advantage of the present invention is that it provides a split lens, wherein the split lens includes a first lens assembly and a second lens assembly, the first lens component is fixed to the second lens assembly, the outer black object is covered on the upper end of the first lens assembly, and the outer black object has an assembly space, allowing the first lens assembly to have a certain adjustment space during the preset stage with the second lens assembly, thereby facilitating the assembly of the outer black object.

[0010] Another advantage of the present invention is that it provides a split lens, wherein the first lens assembly can be adjusted in any direction and angle in space within the range allowed by the assembly space of the outer black object, thereby avoiding interference between the outer black object and the first lens assembly during the assembly process, thereby improving assembly efficiency.

[0011] Another advantage of the present invention is that it provides a split lens, wherein the upper group of lenses is fixed to the second lens assembly by gluing the inner black object, and the ratio of the CTE values ​​of the upper group of lenses and the inner black object is less than or equal to 300%, which is beneficial to improving the stability of the bonding of the split lens.

[0012] Another advantage of the present invention is that it provides a split lens, wherein the first lens assembly and the second lens assembly are bonded together by glue, which helps to reduce the problem of decreased bonding performance of the split lens during testing.

[0013] Another advantage of the present invention is to provide a split lens, wherein the manufacturing method of the split lens can effectively enhance the reliability of lens bonding.

[0014] Another advantage of the present invention is to provide a split lens, wherein the manufacturing method of the split lens can effectively reduce the performance degradation of the split lens due to experiments.

[0015] Another advantage of the present invention is to provide a split lens, wherein the manufacturing method of the split lens can effectively reduce the weakening of the bonding strength of the retaining member due to temperature shock.

[0016] Another advantage of the present invention is to provide a split lens, wherein the manufacturing method of the split lens can effectively increase the bonding strength of the upper and lower groups of the glass+plastic split lens.

[0017] Another advantage of the present invention is that it provides a split lens, wherein the manufacturing method of the split lens can prevent glue from overflowing and prevent the glue from affecting the lens imaging.

[0018] According to one aspect of the present invention, a split lens of the present invention that can achieve the aforementioned objects and other objects and advantages includes:

[0019] a first lens assembly; and

[0020] A second lens assembly, wherein the first lens assembly includes at least one upper lens group, an inner black object, and an outer black object, the inner black object is fixed to the at least one upper lens group, the height of an upper end surface of the inner black object is lower than the height of a top end of the upper lens group, the outer black object covers the inner black object, and the upper lens group is fixed to the second lens assembly by the outer black object.

[0021] According to one embodiment of the present invention, the upper group of lenses includes a light-transmitting area and a structural area extending outward from the light-transmitting area as a whole, wherein the inner black object of the first lens assembly is fixedly connected to the structural area of ​​the upper group of lenses, and the light-transmitting area of ​​the uppermost upper group of lenses protrudes upward from the structural area.

[0022] According to one embodiment of the present invention, the upper lens group has a top, wherein the top is located at the apex of the light-transmitting area of ​​the upper lens group, and the height of the upper end surface of the inner black object is lower than the height of the top of the upper lens group.

[0023] According to one embodiment of the present invention, the inner black object includes an inner black ring body and an inner black edge cover extending inward from the upper end of the inner black ring body, the structural area of ​​the upper group of lenses is pressed under the inner black object, and the top height of the outer black object is higher than the top height of the upper group of lenses to prevent external foreign matter from interfering with the upper group of lenses of the first lens assembly.

[0024] According to one embodiment of the present invention, the height of the inner black object is at least 50 μm higher than the height of the structure area of ​​the upper lens group.

[0025] According to one embodiment of the present invention, the inner black object has a fixed accommodating cavity and a light entrance cavity interconnected therewith, wherein the upper group of lenses is fixed in the fixed accommodating cavity of the inner black object, and external light can be incident on the upper group of lenses through the light entrance cavity, and the first lens assembly further includes at least one upper group of lenses fixing colloid, and the upper group of lenses fixing colloid fixedly bonds the upper group of lenses to the fixed accommodating cavity of the inner black object.

[0026] According to one embodiment of the present invention, at least one glue groove is further provided between the upper group of lenses and the inner black object, wherein the upper group of lenses fixing colloid is located in the glue groove of the inner black object, and the glue groove is connected to the fixed accommodating cavity of the inner black object.

[0027] According to one embodiment of the present invention, the ratio of the CTE value of the inner black object to the CTE value of the upper group of lenses is less than or equal to 6, so as to prevent the risk of the inner black object and the upper group of lenses being broken due to high and low temperature impact.

[0028] According to one embodiment of the present invention, when the upper group of lenses is made of plastic material, the inner black object is selected from any one of the material group consisting of plastic material, a mixture of plastic and mineral fiber, and glass fiber material; when the upper group of lenses is made of glass material, the inner black object is selected from any one of the material group consisting of metal material, plastic material with a high proportion of mineral fiber added, and glass fiber material.

[0029] According to one embodiment of the present invention, the outer black object has an assembly space, the inner black object of the first lens assembly is covered in the assembly space of the outer black object, the inner black object has an inner black object outer wall, and the outer black object further has an outer black object inner wall, and the lateral dimension of the outer black object inner wall of the outer black object is larger than the inner black object outer wall of the inner black object, so as to allow the first lens assembly to have a certain adjustment space in the lateral direction.

[0030] According to one embodiment of the present invention, the assembly space of the outer black object allows the first lens assembly to have an adjustment freedom of 5° in the X-axis, Y-axis or Z-axis direction.

[0031] According to one embodiment of the present invention, the lens barrel of the second lens assembly includes a support platform and a bearing platform, wherein the first lens assembly is fixed to the upper end surface of the support platform of the lens barrel, and the outer black object is fixed to the bearing platform of the lens barrel.

[0032] According to one embodiment of the present invention, the support platform has an upper end surface and a side surface of the support platform, and the outer black object is tightly matched with the side surface of the support platform, that is, the lateral dimension of the inner side wall of the outer black object is slightly smaller than the lateral dimension of the side surface of the support platform.

[0033] According to one embodiment of the present invention, a lateral dimension of an inner side wall of the outer black object is 5-10 μm smaller than a lateral dimension of a side surface of the support platform of the lens barrel.

[0034] According to one embodiment of the present invention, it further includes at least one lens adhesive unit, wherein the lens adhesive unit is arranged between the first lens assembly and the second lens assembly, and the first lens assembly and the second lens assembly are fixedly connected by the lens adhesive unit.

[0035] According to one embodiment of the present invention, the lens adhesive unit further includes a first adhesive unit and a second adhesive unit, wherein the first adhesive unit is arranged between the inner black object of the first lens assembly and the lens barrel of the second lens assembly, and the second adhesive unit is arranged between the upper group of lenses of the first lens assembly and the lens barrel of the second lens assembly.

[0036] According to one embodiment of the present invention, the outer black object includes an outer black object ring body and an extension arm extending from the outer black object ring body toward the optical axis, wherein the outer black object ring body is fixed to the second lens assembly, and the extension arm of the outer black object covers the inner black object and the structural area of ​​the upper group of lenses to protect the upper group of lenses and the inner black object.

[0037] According to one embodiment of the present invention, the outer black object further includes a blocking arm, wherein the blocking arm extends obliquely downward from the extension arm of the outer black object toward the optical axis, and the blocking arm of the outer black object is located on the inner side of the inner black object along the cover of the inner black object, so that the blocking arm blocks external stray light and reduces the entry of external dust into the interior of the first lens assembly.

[0038] According to one embodiment of the present invention, it further includes at least one first bonding colloid and at least one second bonding colloid, wherein the first bonding colloid is located between the inner black object and the outer black object, and the second bonding colloid is located between the outer black object and the lens barrel, and the inner black object and the outer black object are fixedly bonded by the first bonding colloid, and the outer black object and the lens barrel are fixedly bonded by the second bonding colloid.

[0039] According to one embodiment of the present invention, a glue storage space is formed between the inner wall of the outer black object and the outer wall of the inner black object, wherein excess glue forming the first bonding colloid and the second bonding colloid can be accommodated in the glue storage space.

[0040] Further objects and advantages of the present invention will be fully apparent from an understanding of the following description and accompanying drawings.

[0041] These and other objects, features and advantages of the present invention will be more fully understood from the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 1 is a schematic diagram of the overall structure of a split lens according to a first preferred embodiment of the present invention.

[0043] Figure 22 is an exploded schematic diagram of the split lens according to the first preferred embodiment of the present invention.

[0044] Figure 3 2 is a schematic structural diagram of a first lens assembly of the split lens according to the first preferred embodiment of the present invention.

[0045] Figure 4 1 is an inverted schematic diagram of the first lens assembly of the split lens according to the first preferred embodiment of the present invention.

[0046] Figure 5 2 is a schematic diagram of the inverted assembly of the first lens assembly of the split lens according to the first preferred embodiment of the present invention.

[0047] Figure 6A and Figure 6B 2 is a schematic diagram of the bonding structure between the first lens assembly and the second lens assembly of the split lens according to the first preferred embodiment of the present invention.

[0048] Figure 7A and Figure 7B 1 is a schematic structural diagram of the installation of an outer black object of the split lens according to the first preferred embodiment of the present invention. DETAILED DESCRIPTION

[0049] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0050] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0051] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0052] Referring to the accompanying drawings of the present invention Figures 1 to 7A and Figure 7B As shown, a split lens according to the first preferred embodiment of the present invention is explained in the following description. The split lens includes a first lens assembly 10 and a second lens assembly 20, wherein the first lens assembly 10 is located at the upper end of the second lens assembly 20, and the first lens assembly 10 is fixedly connected to the second lens assembly 20. Preferably, in this preferred embodiment of the present invention, the optical axis direction of the first lens assembly 10 of the split lens is adapted to the optical axis direction of the second lens assembly 20. That is, the first lens assembly 10 is located in front of the second lens assembly 20 along the optical axis direction, the first lens assembly is the upper group lens assembly of the split lens, and the second lens assembly is the lower group lens assembly of the split lens.

[0053] The first lens assembly 10 includes at least one upper lens group 11, an inner black object 12 and an outer black object 13 for fixing the at least one upper lens group 11, wherein the inner black object 12 and the outer black object are optical lens black objects, and the at least one upper lens group 11 is fixedly retained on the inner side of the inner black object 12, and the upper lens group 11 is fixed to the second lens assembly 20 by the inner black object 12. The second lens assembly 20 includes at least one lower lens group 21 and a lens barrel 22 for fixing the lower lens group assembly 21, wherein the lens barrel 22 fixedly supports the second lens assembly 21 and the first lens assembly 10 based on an optical axis direction. It is worth mentioning that in this preferred embodiment of the present invention, the number of the upper lens group 11 of the first lens assembly 10 can be one, two or more, and the number of the upper lens group 11 is merely exemplary and not limiting.

[0054] The at least one upper lens group 11 is fixed to the inner black object 12, wherein the outer black object 13 surrounds the outer side of the inner black object 12, and the outer black object 13 is located above the inner black object 12. The outer black object 13 fixes the inner black object 12 and the upper lens group 11 to the second lens assembly 20. Preferably, in this preferred embodiment of the present invention, the outer black object 13 covers the upper end of the inner black object 12.

[0055] like Figure 2 As shown, the upper lens group 11 of the first lens assembly 10 includes a light-transmitting area 111 and a structural area 112 extending outwardly from the light-transmitting area 111, wherein the inner black material 12 of the first lens assembly 10 is fixedly connected to the structural area 112 of the upper lens group 11. In this preferred embodiment of the present invention, the light-transmitting area 111 of the uppermost lens group 11 of the first lens assembly 10 protrudes upward from the structural area 112.

[0056] The inner black object 12 has a fixed accommodating cavity 1200 and a light entrance cavity 1202 interconnected therewith. The upper group of lenses 11 is fixed to the fixed accommodating cavity 1200 of the inner black object 12, and external light can be incident on the upper group of lenses 11 through the light entrance cavity 1202. The inner black object 12 further has an upper end surface 1203 and a lower end surface 1204. The opening of the fixed accommodating cavity 1200 of the inner black object 12 is located on the lower end surface 1204 of the inner black object 12, and the light entrance cavity 1202 of the inner black object 12 is located on the upper end surface 1203 of the inner black object 12. In other words, the fixed accommodating cavity 1200 is located on the backlight side of the inner black object 12, and the light entrance cavity 1202 is located on the light entrance side of the inner black object 12.

[0057] The upper lens group 11 has a top 113, wherein the top 113 is located at the apex of the light-transmitting area 111 of the upper lens group 11, i.e., the top 113 of the upper lens group 11 is the highest position of the upper lens group 11. In this preferred embodiment of the present invention, the height of the upper end surface 1203 of the inner black object 12 is lower than the height of the top 113 of the upper lens group 11, i.e., the inner black object 12 is lower than the height of the top 113 of the upper lens group 11 at the top. It can be understood that minimizing the height of the inner black object 12 can increase the space between the inner black object 12 and the upper lens group within the outer black object 13, thereby reducing the size of the lens. i.e., the smaller the height of the inner black object 12, the lower the overall height of the split lens.

[0058] The inner black member 12 includes an inner black member ring 121 and an inner black member edge cover 122 extending inward from the upper end of the inner black member ring. The inner black member ring 121 and the inner black member edge cover 122 together form the fixed accommodating cavity 1200 and the light entrance cavity 1202. The inner black member edge cover 122 of the inner black member 12 is disposed on the upper end of the upper lens group 11, or the upper lens group 11 is fixed below the inner black member edge cover 122.

[0059] The inner black cover 122 of the inner black object 12 covers the upper portion of the structure area 112 of the upper lens group 11 , and the inner black object 12 presses the upper lens group 11 , thereby preventing the upper lens group 11 from moving up and down.

[0060] It is understood that the upper end surface 1203 of the inner black object 12 is formed on the upper surface of the inner black object along the cover 122 of the inner black object 12, that is, the height of the inner black object 12 along the cover 122 of the inner black object 12 is lower than the top height of the upper group lens 11. In this preferred embodiment of the present invention, in the first lens assembly, the height of the inner black object 12 is at least 50 μm higher than the height of the structural area 112 of the upper group lens 11. Minimizing the height of the inner black object 12 can increase the space between the inner black object 12 and the upper group lens within the outer black object, thereby reducing the size of the lens. As an example, in this preferred embodiment of the present invention, the height of the inner black object 12 is 0.4-0.8 mm, and the outer diameter is 5-9 mm, while the height of the upper group lens 11 is 0.8-1.5 mm, and the outer diameter is 4-7 mm.

[0061] The outer black material 13 covers the upper end of the inner black material 12. Therefore, the height of the outer black material 13 is higher than that of the inner black material 12. Preferably, the height of the outer black material 13 is slightly higher than the overall height of the upper lens group 11, thereby preventing foreign matter from interfering with the upper lens group 11 of the first lens assembly 10. In other words, the upper surface of the outer black material 13 is higher than the top 113 of the upper lens group 11.

[0062] It can be understood that since the inner black object 12 is covered by the outer black object 13, the height of the outer black object 13 is higher than the height of the inner black object 12. If the height of the inner black object 12 is too high, for example, the height of the inner black object 12 exceeds the top height of the upper group of lenses 11 at the upper end, the outer black object 13 will further increase the overall height of the split lens on the basis of the height of the inner black object 12.

[0063] In this preferred embodiment of the present invention, the inner black object 12 is fixed to the upper lens group 11 by gluing. Accordingly, the first lens assembly 10 further includes at least one upper lens group fixing adhesive 14, which securely bonds the upper lens group 11 to the fixing cavity 1200 of the inner black object 12.

[0064] At least one adhesive groove 101 is further defined between the upper lens group 11 and the inner black object 12, wherein the upper lens group fixing adhesive 14 is located in the adhesive groove 101 of the inner black object 12. The adhesive groove 101 communicates with the fixing cavity 1200 of the inner black object 12, wherein adhesive material forming the upper lens group fixing adhesive 14 is applied to the adhesive groove 101, and the adhesive material is bonded to form the upper lens group fixing adhesive 14. Preferably, the adhesive groove 101 is formed in the inner black object 12, wherein the inner black object 12 further has an inner cavity sidewall 1206, wherein the adhesive groove 101 of the inner black object 12 extends inwardly and downwardly from the lower end surface 1204 of the inner black object 12 to the inner cavity sidewall 1206 of the inner black object 12.

[0065] This application addresses the difficulties of the prior art.

[0066] To reduce the overall height of a lens and increase its resolution, prior art often uses glass as the first lens element, or the upper lens group, for lens assembly. However, since glass lenses are inorganic materials, while the lens barrel that secures the upper lens group is typically made of organic materials such as plastic, achieving a matching bond strength between the two lenses is difficult, and improving the adhesive bonding strength is difficult. Furthermore, when the lens is exposed to high temperatures and pressure, the increased external temperature can easily cause the internal lens element to expand overall. Different materials have different expansion coefficients. If the outer surface of the lens element is secured to the second lens element by adhesive, and the adhesive itself expands when heated, the CTE of the adhesive itself is generally between 30 and 100, while the CTE of a glass lens is approximately 10. Therefore, in high-temperature environments, the adhesive will experience the greatest deformation. If the upper lens group is made of glass, the CTE of glass itself is relatively low, and in high-temperature environments, such as 85 degrees Celsius, the deformation of the lens element will be much less than that of the adhesive. This causes the adhesive securing the lens to shift from the adhesive securing the second lens assembly to the black material, which in turn increases the risk of lens breakage. When the upper lens group is made of glass, the bonding strength is weakened and the chance of lens breakage due to temperature fluctuations increases.

[0067] Accordingly, in this preferred embodiment of the present invention, the upper group of lenses 11 is adhered to the inner side of the inner black object 12, and the inner black object 12 is bonded and fixed to the top of the second lens assembly 20, that is, the upper group of lenses 11 is fixed to the second lens assembly 20 by the inner black object 12, and the ratio of the CTE value of the inner black object 12 to the CTE value of the upper group of lenses 11 is less than or equal to 300%, so as to prevent the risk of easy falling off due to the adhesive material provided on the surface of the lens and the second lens component under temperature changes.

[0068] Furthermore, in this field, to ensure consistent lens barrel injection molding, mainstream solutions require the material used for the lens barrel to have low shrinkage. Therefore, the shrinkage rate of most mainstream materials is around 0.5%-1.5%, which is beneficial for the moldability of the finished product. Furthermore, for lens barrel demolding, the material must have low viscosity and good demolding properties. In summary, in the field of optical lenses, there are few general-purpose materials for lens barrels, mostly PC. Furthermore, because PC is a polymer material, the CTE of many component formulations is around 70-100. In the past, for 4-6 lens elements, since the lens sizes were relatively small, the performance of the optical system composed of the lenses was not significantly affected by small size changes. However, with the development of high-end 7-8 lens elements and large aperture solutions, the lens diameter and optical sensitivity have become larger and more sensitive than those of 4-6 lens elements due to the corresponding adjustments required for the optical system. Therefore, the industry now has reliability improvement plans for these high-end lens solutions.

[0069] Similarly, when the lens barrel is exposed to high temperature and high pressure, the external temperature rises, which can easily cause the entire lens barrel to expand. Unlike glue, glue often has a higher deformation in the length direction than in the width direction due to the amount of glue deployed. The lens barrel, as the container for the outside of the lens, has the largest size among the lens components and has a relatively higher deformation in all directions compared to other components. For example, in a split lens solution, the outside of the first lens component is fixed to the second lens component by glue. When the glue, the first lens component, and the second lens component are heated, all three will expand. Generally, due to the larger overall volume of the lower lens component, the corresponding deformation is often the largest. At this time, the glue and the lower lens component will have a deformation difference, and the glue and the upper lens component on which it is located will also have a deformation difference. At this time, if the glue is considered alone as a quantitative factor, it will also cause relative deformation errors between the lower and upper lens components, resulting in deterioration of the optical performance and bonding performance of the lens.

[0070] In this preferred embodiment of the present invention, the upper group lens 11 of the first lens assembly 10 can be a glass lens or a lens made of other materials. By selecting mutually compatible materials, the ratio of the CTE value of the inner black object 12 to the CTE value of the upper group lens 11 is less than or equal to 300%, thereby preventing the risk of the inner black object 12 and the upper group lens 11 from being shattered due to high and low temperature impact.

[0071] It is worth mentioning that the inner black object 12 can provide a buffering effect in temperature shock and mechanical shock reliability tests because the inner black object 12 increases the bonding length of the glue. The inner black object 12 is installed on the outside of the upper group lens 11. If it is subjected to stress or external force, the inner black object 12 itself can more easily compensate for stress, external force and other deformations through bending deformation, thereby ensuring optical performance.

[0072] In another preferred embodiment, the CTE ratio of the inner black object 12 and the upper group lens 11 is controlled within 2-6 times. The inner black object 12 serves as a component that extends the lateral dimension of the upper group lens 11, thereby increasing the bonding area, providing more bonding space, and enhancing the bonding strength of the upper group lens 11, thereby preventing the upper group lens 11 from falling off under the influence of external force.

[0073] In existing solutions, glue is applied to the sidewalls of the upper lens group. Because this glue has a higher CTE than the lens itself, the side glue changes more dramatically when subjected to temperature fluctuations than the glue itself. Consequently, during conventional reliability temperature testing, for example, the upper lens group can easily shift due to tensile stress from the side glue, causing the upper lens group to shift eccentrically relative to the lower lens group. In this preferred embodiment of the present invention, glue can be applied to the bottom surface of the inner black material 12. This increases the bottom bonding area, eliminating the need for side glue bonding compensation.

[0074] For example, in this preferred embodiment of the present invention, when the upper lens group 11 is made of plastic, the inner black material 12 is also made of plastic, or a mixture of plastic and mineral fiber, or a glass fiber material. When the upper lens group 11 is made of glass, the inner black material 12 can be made of metal, or a plastic material with a high proportion of mineral fiber, or a glass fiber material, to ensure that the CTE values ​​of the upper lens group 11 and the inner black material 12 are similar.

[0075] Preferably, in this preferred embodiment of the present invention, when the upper lens 11 is a glass lens, the CTE value of the glass lens is between 8 and 15; accordingly, the inner black material 12 is a PC material with 30% carbon fiber added, which has good demoulding properties and is bromine-free and flame retardant, and the density of the material is 1.3-1.5 g / cm 2The material is required to have high flexibility and impact resistance, with a shrinkage rate of 0.25-0.45%, a flexural strength of 80-100 MPa, a flexural modulus of 4800-5200 MPa, and a heat deformation temperature of 120-140°C. Furthermore, the CTE of this preferred material is between 38-42, approaching that of glass lenses. Therefore, the ratio of the CTE value of the inner black material 12 to the CTE value of the upper lens group 11 is less than or equal to 300%.

[0076] Preferably, in this preferred embodiment of the present invention, the upper group lens 11 is made of glass, which has a small CTE value, and the lens barrel 22 is made of PC, which has a large CTE value. The CTE gradient difference between the upper group lens 11 and the lens barrel 22 is reduced by the inner black object 12 and the outer black object 13, thereby avoiding poor bonding stability due to temperature difference.

[0077] The outer black object 13 is disposed at the upper end of the second lens assembly 20 and is used to secure the first lens assembly 10. The outer black object 13 has an assembly space 1301, and the inner black object 12 of the first lens assembly 10 is covered in the assembly space 1301 of the outer black object 13. The inner black object 12 has an inner black object outer wall 1201, wherein the inner black object outer wall 1201 is formed on the outer edge of the inner black object 12. The outer black object 13 further has an outer black object inner wall 1302, wherein the outer black object inner wall 1302 is formed on the inner surface of the outer black object 13. The outer black object 13's inner sidewall 1302 surrounds and forms the assembly space 1301. Assuming the optical axis (Z-axis) of the split lens is the longitudinal direction, and directions perpendicular to the optical axis are the transverse directions (X-axis and Y-axis), the lateral dimensions of the outer black object inner sidewall 1302 of the outer black object 13 are greater than the lateral dimensions of the inner black object outer sidewall 1201 of the inner black object 12. That is, the lateral dimensions of the assembly space 1301 of the outer black object 13 are greater than the lateral dimensions of the inner black object 12. The outer black object 13 is positioned above the inner black object 12, and the assembly space 1301 of the outer black object 13 allows for a certain amount of adjustment space for the first lens assembly 10 along the X-axis and Y-axis directions, so that the outer black object 13 does not interfere with the inner black object 12 of the first lens assembly 10 during installation.

[0078] Preferably, in this preferred embodiment of the present invention, the lateral dimension of the inner wall 1302 of the outer black object is greater than the lateral dimension of the outer wall 1201 of the inner black object 12, wherein the assembly space 1301 of the outer black object 13 allows the first lens assembly 10 to have 5° of adjustment freedom in the X-axis, Y-axis or Z-axis direction.

[0079] It is worth mentioning that in this preferred embodiment of the present invention, the inner black object 12 and the outer black object 13 are both optical lens black objects, wherein the upper group of lenses 11 of the first lens assembly 10 is fixed to the second lens assembly 20 by the inner black object 12 and the outer black object 13.

[0080] like Figure 5 As shown, the assembly process of the split lens is shown, wherein the assembly process of the split lens includes: an assembly stage of the first lens assembly, a preset stage of the first lens assembly and the second lens assembly, and an assembly stage of the outer black object. The upper group of lenses 11 is assembled to the inner black object 12, and the upper group of lenses 11 and the inner black object 12 are fixed to each other by gluing. The first lens assembly 10 is preset at the upper end of the second lens assembly 20 based on the assembly space 1301 of the outer black object 13, and after calibrating the relative positions of the first lens assembly 10 and the second lens assembly 20, the first lens assembly 10 is fixed to the upper end of the second lens assembly 20. An outer black object 13 is prepared, and the outer black object 13 is assembled to the corresponding position of the second lens assembly 20 to obtain the split lens.

[0081] During the pre-setting process of the first lens assembly 10 and the second lens assembly 20, the relative positional relationship between the first lens assembly 10 and the second lens assembly 20 is actively calibrated. The inner black object 12 of the first lens assembly 10 can be moved along a spatial direction (X-axis, Y-axis, or Z-axis) within the permitted spatial range of the assembly space 1301 of the outer black object 13 to achieve the desired light transmission effect. After calibration, the first lens assembly 10 and the second lens assembly 20 are fixed by gluing to facilitate the subsequent assembly of the outer black object 13.

[0082] like Figure 5 As shown, the inner black object 12 is inverted, and the upper lens group 11 is placed into the fixed accommodating cavity 1200 of the inner black object 12 through the lower end opening of the inner black object 12. The upper lens group 11 and the inner black object 12 together define the adhesive groove 101. Glue is applied to the adhesive groove 101 between the inner black object 12 and the upper lens group 11, and after the glue is cured, the upper lens group fixing glue 14 is formed in the adhesive groove 101.

[0083] Alternatively, in other optional embodiments of the present invention, the adhesive groove 101 is formed in the upper lens group 11, wherein the upper lens group 11 has an outer sidewall 110, and the adhesive groove 101 extends upward and inward from the outer sidewall 110 of the upper lens group 11 to a top surface of the upper lens group 11. Alternatively, in other optional embodiments of the present invention, the adhesive groove 101 may also be formed in the upper lens group 11 and the inner black object 12. It is understood that the adhesive material forming the upper lens group fixing adhesive 14 is molded in the adhesive groove 101 and fixedly connects the upper lens group 11 to the inner black object 12.

[0084] It's worth noting that the adhesive groove 101 defined by the inner black object 12 and the upper lens group 11 opens toward the backlight side. When the inner black object 12 is inverted, the adhesive is filled into the adhesive groove 101 from the backlight side of the first lens assembly 10. Therefore, during the adhesive application and colloid bonding process, the adhesive remains within the adhesive groove 101, preventing it from overflowing. Furthermore, the adhesive applied to the adhesive groove 101, under the influence of gravity, can seep into the gap between the upper lens group 11 and the inner black object 12, further securing the upper lens group 11 and the inner black object 12 via the adhesive, improving the reliability of the lens bonding.

[0085] The lens barrel 22 of the second lens assembly 20 includes a support platform 221 and a bearing platform 222, wherein the first lens assembly 10 is fixed to the upper end surface of the support platform 221 of the lens barrel 22, and the outer black object 13 is fixed to the bearing platform 222 of the lens barrel 22. The support platform 221 of the lens barrel 22 protrudes upward from the bearing platform 222, that is, the support platform 221 integrally extends upward from the inner side of the bearing platform 222. The support platform 221 of the lens barrel 22 has a support platform upper end surface 2211 and a support platform side surface 2212, wherein the support platform upper end surface 2211 is the upper surface of the support platform 221, and the support platform side surface 2212 is located on the side of the support platform 221. The inner black object 12 of the first lens assembly 10 is fixed to the upper end surface 2211 of the support platform 221, and the outer black object 13 is tightly matched with the support platform side surface 2212 of the support platform 221, that is, the lateral dimension of the outer black object inner wall 1302 of the outer black object 13 is slightly smaller than the lateral dimension of the support platform side surface 2212 of the support platform 221.

[0086] Preferably, the lateral dimension of the inner side wall 1302 of the outer black object 13 is 5-10 μm smaller than the lateral dimension of the support platform side 2212 of the support platform 221 of the lens barrel 22, so as to ensure that the outer black object 13 can be better assembled to the outside of the lens barrel 22 through mechanical assembly.

[0087] That is to say, when the outer black object 13 is in a tight fit with the support platform 221 of the lens barrel 22, in the preset stage, the first lens assembly 10 is allowed to adjust its position within the range of the upper end surface 2211 of the support platform 221 of the lens barrel 22 to meet the need for active adjustment of the split lens.

[0088] like Figure 6A and Figure 6B As shown, the inner black object 12 is fixed to the lens barrel 22 of the second lens assembly 20 by gluing. The split lens further includes at least one lens gluing unit 40, wherein the lens gluing unit 40 is disposed between the first lens assembly 10 and the second lens assembly 20, and the first lens assembly 10 and the second lens assembly 20 are fixedly connected by the lens gluing unit 40.

[0089] like Figure 6A As shown, in this preferred embodiment of the present invention, the lens adhesive unit 40 is disposed between the inner black object 12 of the first lens assembly 10 and the lens barrel 22 of the second lens assembly 20, and the inner black object 12 is bonded and fixed to the lens barrel 22 of the second lens assembly 20 by the lens adhesive unit 40. Preferably, in this preferred embodiment of the present invention, the adhesive forming the lens adhesive unit 40 is applied to the lower end surface 1204 of the inner black object 12; or the adhesive forming the lens adhesive unit 40 is applied to the position of the lens barrel 22 of the second lens assembly 20 corresponding to the inner black object 12. It can be understood that in this preferred embodiment of the present invention, no glue is provided between the upper group of lenses 11 of the first lens assembly 10 and the second lens assembly 20. The upper group of lenses 11 is fixed by the inner black object 12, and the upper group of lenses 11 is fixedly connected to the second lens assembly 20 by the inner black object 12, thereby maintaining the relative positions of the upper group of lenses 11 and the second lens assembly 20 fixed.

[0090] like Figure 6BAs shown, in this preferred embodiment of the present invention, the lens adhesive unit 40 further includes a first adhesive unit 41 and a second adhesive unit 42, wherein the first adhesive unit 41 is disposed between the inner black object 12 of the first lens assembly 10 and the lens barrel 22 of the second lens assembly 20, that is, the inner black object 12 is bonded and fixed to the lens barrel 22 of the second lens assembly 20 by the first adhesive unit 41. The second adhesive unit 42 is disposed between the upper lens group 11 of the first lens assembly 10 and the lens barrel 22 of the second lens assembly 20, and the upper lens group 11 is fixedly connected to the second lens assembly 20 by the second adhesive unit 42.

[0091] Preferably, the adhesive forming the first adhesive unit 41 is applied to the lower end surface 1204 of the inner black object 12, and the adhesive forming the second adhesive unit 42 is applied to the lower end surface of the upper lens group 11. It is understood that applying adhesive in two locations can increase the bonding strength of the split lens and prevent poor bonding caused by external impact, temperature changes, etc.

[0092] It is worth mentioning that the adhesive material described in this application can be but is not limited to UV adhesive, thermosetting adhesive or UV thermosetting adhesive, etc.

[0093] Preferably, the outer black object 13 is an optical lens black object, wherein the material of the outer black object 30 is preferably PC material, wherein the material has the characteristics of low viscosity and good demoulding performance, and the density of the material is 1.14-1.24g / cm 2 , shrinkage is 0.5-0.8%, flexural strength is 60-80 MPa, flexural modulus is 2200-2600 MPa, and thermal deformation temperature is 120-140° C. Preferably, the CTE value of the material of the outer black object 13 of the present invention is between 68-72.

[0094] The outer black object 13 is fixedly bonded to the outer side of the inner black object 12 and the second lens assembly 20 by adhesive. The outer black object 13 further fixes the relative position of the upper group of lenses 11 of the first lens assembly 10 with respect to the second lens assembly 20, thereby improving the reliability of lens bonding and reducing the weakening of the bonding strength between the black object and the lenses due to temperature shock.

[0095] The outer black object 13 includes an outer black object ring 131 and an extension arm 132 extending from the outer black object ring 131 toward the optical axis. The outer black object ring 131 is fixed to the second lens assembly 20. The extension arm 132 of the outer black object 13 covers the inner black object 12 and the structural area 112 of the upper lens group 11 to protect the upper lens group 11 and the inner black object 12. The outer black object ring 131 of the outer black object 13 has an annular structure, and the lower end of the outer black object ring 131 is fixedly connected to the lens barrel 22 of the second lens assembly 20 via adhesive.

[0096] The outer black member 13 further includes a blocking arm 133, wherein the blocking arm 133 extends obliquely downward from the extension arm 132 of the outer black member 13 toward the optical axis. The blocking arm 133 of the outer black member 13 is located inside the inner black member edge cover 122 of the inner black member 12, thereby blocking external stray light and reducing the ingress of dust into the interior of the first lens assembly 10. The inner black member edge cover 122 of the inner black member 12 covers the outer side of the structural area 112 of the upper lens group 11, and one end of the blocking arm 133 covers the inner side of the structural area 112 of the upper lens group 11 and above the inner black member edge cover 122 of the inner black member. Therefore, in this preferred embodiment of the present invention, the blocking arm 133 of the outer black member 13 further maintains the position of the upper lens group 11 and blocks the ingress of dust and stray light.

[0097] The blocking arm 133 of the outer black object 13 has an inner bevel 1331, an outer bevel 1332, and a pressing surface 1333 located between the inner bevel 1331 and the outer bevel 1332. The pressing surface 1333 of the blocking arm 1333 is in close contact with the inner side of the structural area 112 of the upper lens group 11. The outer bevel 1332 of the blocking arm 133 extends upward and obliquely outward from the pressing surface 1333 to the extension arm 132 of the outer black object 13, forming a light-collecting space inside the outer bevel 1332 of the outer black object 13, which facilitates the entry of light from the external environment into the upper lens group 12 through the light-collecting space.

[0098] like Figure 7A and Figure 7BAs shown, the outer black object 13 is fixedly connected to the inner black object 12 and the lens barrel 22 of the second lens assembly 20 by gluing, thereby further fixing the inner black object 12 and the upper lens group 11 above the second lens assembly 20 by the outer black object 13. Accordingly, the split lens further includes at least one first adhesive colloid 50 and at least one second adhesive colloid 60, wherein the first adhesive colloid 50 is located between the inner black object 12 and the outer black object 13, and the second adhesive colloid 60 is located between the outer black object 13 and the lens barrel 22. The first adhesive colloid 50 fixes the inner black object 12 and the outer black object 13, and the second adhesive colloid 60 fixes the outer black object 13 and the lens barrel 22.

[0099] In other words, in this preferred embodiment of the present invention, the inner black object 12 can be bonded and fixed by the outer black object 30 , and the upper group of lenses 11 can be further retained on the lens barrel 22 by the outer black object 30 .

[0100] Alternatively, in another embodiment of the present invention, no adhesive is provided between the outer black object 30 and the inner black object 12. Instead, the adhesive is provided only between the outer black object 30 and the lens barrel 22. This means that no adhesive is provided between the outer black object 30 and the inner black object 12. This allows the upper lens group 11 to be isolated and bonded. Because larger lens barrels 22 experience greater dimensional changes when the temperature changes, the inner black object 12 is only glued to the lens barrel 22 of the lower lens group. There is no adhesive between the inner black object 12 and the outer black object 30. In this embodiment, the retaining member fixing adhesive is not provided between the inner black object 12 and the outer black object 30. The deformation of the colloid is much smaller than that of the outer black object 30. Therefore, in this solution, the inner black object 12 can isolate the upper group of lenses 11 from the large-sized black objects outside and prevent them from being affected by temperature changes and size changes. The inner black object 12 itself is optimized in size and structure, and its own deformation is relatively small. Therefore, this solution can isolate the internal lenses from the effects of external deformation.

[0101] The outer black object 13 is bonded to the support platform 222 of the lens barrel 22 by the second bonding colloid 60. Preferably, in this preferred embodiment of the present invention, the adhesive material forming the first bonding colloid 50 is applied to the upper end surface of the inner black object 12, and the adhesive material forming the second bonding colloid 60 is applied to the support platform 222 of the lens barrel 22.

[0102] It is worth mentioning that when the outer black object 13 is installed on the supporting platform 222 of the lens barrel 22, a glue storage space 1303 is formed between the outer black object inner wall 1302 of the outer black object 13 and the inner black object outer wall 1201 of the inner black object 12, wherein the excess glue forming the first bonding glue 50 and the second bonding glue 60 can be accommodated in the glue storage space 1303, which is conducive to preventing the glue from overflowing.

[0103] It is worth mentioning that the inner black object 12 and the outer black object 13 are bonded and fixed to each other by the first adhesive colloid 50 to strengthen the connection between the inner black object 12 and the outer black object 13. When the outer black object 13 is subjected to an impact, part of the impact force applied to the outer black object 13 is transmitted to the inner black object 12 through the first adhesive colloid 50, thereby preventing the outer black object 13 from falling off.

[0104] In one embodiment of the present invention, the inner black object 12 and the outer black object 13 are connected to form an integral structure, wherein the inner black object 12 and the outer black object 13 are made of the same material. When subjected to temperature changes, the deformed dimensions of each other can be offset as a whole, thereby reducing shape deformation.

[0105] It is worth mentioning that the adhesive forming the first adhesive colloid 50 is applied to the upper end surface 1203 of the inner black object 12, thereby preventing the adhesive from being set in the lateral direction to cause displacement of the center of the lens, thereby causing the entire lens to shift, and also preventing the first lens assembly 10 from falling off due to lateral force.

[0106] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended to be illustrative only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. A split lens, characterized in that: include: a first lens assembly; and A second lens assembly, wherein the first lens assembly includes at least one upper group lens, an inner black object and an outer black object, the inner black object is fixed to the at least one upper group lens, the height of an upper end surface of the inner black object is lower than the height of a top end of the upper group lens, wherein the outer black object covers the inner black object, and the upper group lens is fixed to the second lens assembly by the outer black object, wherein the inner black object is fixed to the second lens assembly, and the upper group lens is fixed to the second lens assembly by the inner black object, the upper group lens includes a light-transmitting area and a structural area extending outward from the light-transmitting area as a whole, wherein the inner black object of the first lens assembly is fixedly connected to the structural area of ​​the upper group lens, and the light-transmitting area of ​​the uppermost upper group lens protrudes upward from the structural area.

2. The split lens according to claim 1 , wherein the upper lens group has a top, wherein the top is located at the apex of the light-transmitting area of ​​the upper lens group, and the height of the upper end surface of the inner black object is lower than the height of the top of the upper lens group.

3. The split lens according to claim 2, wherein the inner black object includes an inner black object ring body and an inner black object edge cover extending inward from the upper end of the inner black object ring body, the structural area of ​​the upper group of lenses is pressed under the inner black object, and the top height of the outer black object is higher than the top height of the upper group of lenses, so as to prevent foreign matter from interfering with the upper group of lenses of the first lens assembly.

4. The split lens according to claim 2, wherein the height of the inner black object is 50 μm higher than the height of the structure area of ​​the upper lens group. 5 . The split lens according to claim 3 , wherein the height of the inner black object is 50 μm higher than the height of the structure area of ​​the upper lens group.

6. The split lens according to claim 3, wherein the inner black object has a fixed accommodating cavity and a light entrance cavity interconnected therewith, wherein the upper group of lenses is fixed in the fixed accommodating cavity of the inner black object, and external light can be incident on the upper group of lenses through the light entrance cavity, and the first lens assembly further includes at least one upper group of lenses fixing colloid, wherein the upper group of lenses fixing colloid fixedly bonds the upper group of lenses to the fixed accommodating cavity of the inner black object.

7. The split lens according to claim 6, wherein at least one adhesive groove is further provided between the upper lens group and the inner black object, wherein the adhesive fixing the upper lens group is located in the adhesive groove, and the adhesive groove is connected to the fixed accommodation cavity of the inner black object.

8. The split lens according to claim 3, wherein the ratio of the CTE value of the inner black object to the CTE value of the upper group of lenses is less than or equal to 6, so as to prevent the risk of the inner black object and the upper group of lenses from being shattered due to high and low temperature impact.

9. The split lens according to claim 8, wherein when the upper lens group is made of plastic, the inner black object is selected from any one of the material group consisting of plastic, a mixture of plastic and mineral fiber, and glass fiber; when the upper lens group is made of glass, the inner black object is selected from any one of the material group consisting of metal, plastic with a high proportion of mineral fiber added, and glass fiber.

10. The split lens according to claim 8, wherein the outer black object has an assembly space, the inner black object of the first lens assembly is covered in the assembly space of the outer black object, the inner black object has an inner black object outer wall, the outer black object further has an outer black object inner wall, the lateral dimension of the outer black object inner wall of the outer black object is larger than the inner black object outer wall of the inner black object, so as to allow the first lens assembly to have a certain adjustment space in the lateral direction. 11 . The split lens according to claim 9 , wherein the assembly space of the outer black object allows the first lens assembly to have an adjustment freedom of 5° in the X-axis, Y-axis and Z-axis directions.

12. The split lens according to claim 10, wherein the second lens assembly comprises at least one lower group of lenses and a lens for fixing the at least one lower group of lenses, the lens barrel of the second lens assembly comprises a support platform and a bearing platform, wherein the first lens assembly is fixed to the upper end surface of the support platform of the lens barrel, and the outer black object is fixed to the bearing platform of the lens barrel.

13. The split lens according to claim 12, wherein the support platform has an upper end surface and a side surface of the support platform, and the outer black object is tightly matched with the side surface of the support platform, that is, the lateral dimension of the inner side wall of the outer black object is slightly smaller than the lateral dimension of the side surface of the support platform. 14 . The split lens according to claim 12 , wherein a lateral dimension of an inner sidewall of the outer black object is 5-10 μm smaller than a lateral dimension of a side surface of the support platform of the lens barrel.

15. The split lens according to claim 8, further comprising at least one lens adhesive unit, wherein the lens adhesive unit is arranged between the first lens assembly and the second lens assembly, and the first lens assembly and the second lens assembly are fixedly connected by the lens adhesive unit.

16. The split lens according to claim 15, wherein the lens adhesive unit further comprises a first adhesive unit and a second adhesive unit, wherein the first adhesive unit is arranged between the inner black object of the first lens assembly and the lens barrel of the second lens assembly, and the second adhesive unit is arranged between the upper group of lenses of the first lens assembly and the lens barrel of the second lens assembly.

17. The split lens according to claim 8, wherein the outer black object comprises an outer black object ring body and an extension arm extending from the outer black object ring body toward the optical axis, wherein the outer black object ring body is fixed to the second lens assembly, and the extension arm of the outer black object covers the inner black object and the structural area of ​​the upper group of lenses to protect the upper group of lenses and the inner black object.

18. The split lens according to claim 17, wherein the outer black object further includes a blocking arm, wherein the blocking arm extends obliquely downward from the extension arm of the outer black object toward the optical axis, and the blocking arm of the outer black object is located on the inner side of the inner black object along the cover of the inner black object, so that the blocking arm blocks external stray light and reduces external dust from entering the interior of the first lens assembly.

19. The split lens according to claim 12 further comprises at least one first adhesive colloid and at least one second adhesive colloid, wherein the first adhesive colloid is located between the inner black object and the outer black object, and the second adhesive colloid is located between the outer black object and the lens barrel, wherein the first adhesive colloid fixes the inner black object and the outer black object, and the second adhesive colloid fixes the outer black object and the lens barrel.

20. The split lens according to claim 19, wherein a glue storage space is formed between the outer black object inner wall of the outer black object and the inner black object outer wall of the inner black object, wherein excess glue forming the first bonding colloid and the second bonding colloid can be accommodated in the glue storage space.

Images