Split lens and method of manufacturing the same

Abstract

The present application provides a split lens and a manufacturing method thereof, wherein the split lens comprises a first lens assembly and a second lens assembly, the first lens assembly is fixed above the second lens assembly, the first lens assembly comprises at least one upper group lens and a holding member, the upper group lens is bonded to the holding member, the holding member is fixed with the second lens assembly, the holding member is an optical lens black object, and the ratio of the CTE value of the holding member to the CTE value of the upper group lens is less than or equal to 6.

Description

TECHNICAL FIELD

[0001] The present application relates to an optical lens, in particular to a split lens and a manufacturing method thereof. BACKGROUND

[0002] With the improvement of consumption level, consumers have higher and higher requirements for the camera function of mobile phones. On the other hand, consumers prefer more compact electronic devices, and now mobile terminals and the like pursue high screen ratio, and the rear cover is as unobtrusive as possible, which poses new challenges to the camera module of the mobile phone. In order to achieve better camera function, zoom, anti-shake, high pixel, large aperture, small size and the like have become irreversible development trends of the camera module, and consumers' requirements for the imaging quality of the camera module are also increasing.

[0003] The existing split lens scheme can compensate for the errors caused by lens forming and assembly by actively calibrating and assembling two lens components, so the split lens scheme can improve the assembly yield of more than 7P multi-piece lenses, improve the assembly yield of periscopic lenses, and also realize high-yield large-aperture lens assembly. Objectively, the split lens needs to assemble multiple groups of lens components, so compared with the integrated scheme, the reliability may not meet the requirements sometimes, so the split lens scheme sometimes needs to improve the reliability of the split lens. The reliability test of the lens in the general industry includes mechanical impact, drop test, and temperature test such as high-low temperature impact and high-temperature cycle. With the upgrading of the industry, these test items will become more and more stringent, so as to ensure the high yield and reliability of the production products. Sometimes, the split lens may be prone to falling off and performance degradation after the reliability test due to unreasonable lens structure design.

[0004] It is worth mentioning that the glass lens itself has relatively high light transmittance and large refractive index, and compared with the plastic lens, the glass lens can reduce the height of the overall lens, so the lens with the glass lens has certain advantages and can meet the needs of consumers. However, the full-glass lens is not the mainstream mobile phone lens scheme at present because the density and mass of the glass itself are large, so for the split lens, the upper group of lenses can be made of glass material to reduce the height of the overall lens, and the split lens can also compensate for the eccentricity, tilt and other defects of the glass lens after active calibration.

[0005] In another aspect, the glass lens needs to be kept at a high temperature due to the glass blank manufacturing process, and the mold is used to press the glass blank to form a structure, so if the structure area of the glass lens is relatively large compared to the optical area, that is, the structure area that needs to be pressed is too large, it is easy to cause the glass lens to crack after cooling, so the structure area of the glass lens is not very large, generally the structure area of the glass lens in the mobile phone is about 0.3-0.6mm, and the structure area of the corresponding plastic lens can be 0.8-1.5mm. Therefore, the existing structure has a glue for bonding strength compensation on the side wall of the lens when the structure area is short.

[0006] In another aspect, in various temperature-related reliability tests, as the external temperature increases, the overall thermal expansion of the lens occurs. In the prior art, the lens is fixed on the lower group by setting glue on the outside and bottom of the lens. The size of the glue, the lens barrel and the lens will change, but in general, the CTE value of the glue itself is 90-110, the CTE of the glass lens is about 10, the CTE of the plastic lens is about 60, and the CTE of the lower group black object is about 80. Once in a high-temperature environment, the deformation amount of the glue material is the largest. If the upper group lens is a glass lens, due to the small CTE value of the glass itself, the deformation amount of the lens in a high-temperature environment, such as an environment of 85 degrees Celsius, is much smaller than that of the glue material. The fixed position of the glue material may deviate from the fixed position of the glue material of the lower group lens, thereby causing the lens to fall off. When the upper group lens is a glass lens, the bonding area is smaller, and the existing structure has a glue for bonding strength compensation on the side wall of the lens when the structure area is short. However, after the side glue compensation, the size change of the side glue may cause the lens to be pulled by the glue, resulting in lens falling off or lens position change, which may affect the optical performance and increase the risk of lens falling off due to temperature change.

[0007] Therefore, a new lens structure is needed to meet the needs. SUMMARY

[0008] One of the main advantages of the present application is to provide a split lens and a manufacturing method thereof, wherein the split lens comprises a first lens assembly and a second lens assembly, wherein the first lens assembly is mounted on the upper side of the second lens assembly, the first lens assembly comprises at least one upper group lens and a retaining member for fixing the upper group lens, and the ratio of the CTE values of the retaining member and the upper group lens is less than or equal to 300%, which is beneficial to improve the stability of the split lens bonding.

[0009] Another advantage of the present application is to provide a split lens and a manufacturing method thereof, wherein the split lens comprises a first lens assembly and a second lens assembly, the first lens assembly is mounted on the upper side of the second lens assembly, the first lens assembly comprises at least one upper group lens and a holder for fixing the upper group lens, and the ratio of the CTE values of the holder and the upper group lens is between 2 and 6, which is beneficial to improve the stability of the split lens bonding.

[0010] Another advantage of the present application is to provide a split lens and a manufacturing method thereof, wherein the first lens assembly and the second lens assembly are bonded by glue, which is beneficial to reduce the problem of bonding performance degradation of the split lens during the test.

[0011] Another advantage of the present application is to provide a split lens and a manufacturing method thereof, wherein the manufacturing method of the split lens can effectively enhance the reliability of lens bonding.

[0012] Another advantage of the present application is to provide a split lens and a manufacturing method thereof, wherein the manufacturing method of the split lens can effectively reduce the performance degradation of the split lens due to the test.

[0013] Another advantage of the present application is to provide a split lens and a manufacturing method thereof, wherein the manufacturing method of the split lens can effectively reduce the bonding strength weakening of the holder due to temperature impact.

[0014] Another advantage of the present application is to provide a split lens and a manufacturing method thereof, wherein the manufacturing method of the split lens can effectively increase the bonding strength of the upper group and the lower group of the glass + plastic split lens.

[0015] Another advantage of the present application is to provide a split lens and a manufacturing method thereof, wherein the manufacturing method of the split lens can prevent glue overflow and prevent glue from affecting lens imaging.

[0016] Another advantage of the present application is to provide a split lens and a manufacturing method thereof, wherein the split lens further comprises a fixing member, the fixing member is arranged outside the holder, and an adjustment space is arranged between the fixing member and the holder, which allows the holder to be adjusted during the preset process, thereby preventing the fixing member and the holder from interfering with each other.

[0017] According to an aspect of the present application, a split lens of the present application can achieve the foregoing objects and other objects and advantages, comprising:

[0018] a first lens assembly; and

[0019] A second lens assembly, wherein the first lens assembly is fixed above the second lens assembly, the first lens assembly comprises at least one upper group lens and a holder, wherein the upper group lens is bonded to the holder, the holder is fixed to the second lens assembly, and the ratio of the CTE value of the holder to the CTE value of the upper group lens is less than or equal to 6.

[0020] According to an embodiment of the present application, the upper group lens comprises a light transmission region and a structure region integrally extending outward from the light transmission region, wherein the holder of the first lens assembly is bonded to the structure region of the upper group lens.

[0021] According to an embodiment of the present application, when the upper group lens is made of plastic material, the holder is made of plastic material, or a mixture of plastic and mineral fiber, or glass fiber material.

[0022] According to an embodiment of the present application, when the upper group lens is made of glass material, the holder is made of metal material or plastic material with a high proportion of mineral fiber, or glass fiber material.

[0023] According to an embodiment of the present application, the holder has a fixed accommodating cavity and a light inlet cavity in communication with each other, wherein the upper group lens is fixed in the fixed accommodating cavity of the holder, the fixed accommodating cavity is located at the back light side of the holder, and the light inlet cavity is located at the light inlet side of the holder.

[0024] According to an embodiment of the present application, the first lens assembly further comprises an upper group lens fixing glue, and at least one glue groove is arranged between the holder and the upper group lens, wherein the glue groove is in communication with the fixed accommodating cavity of the holder, and the upper group lens fixing glue is formed in the glue groove.

[0025] According to an embodiment of the present application, the glue groove is formed in the holder, and the holder further has an accommodating cavity inner side wall, wherein the glue groove of the holder extends inwardly and downwardly from the lower end surface of the holder to the accommodating cavity inner side wall of the holder.

[0026] According to an embodiment of the present application, the holder comprises a holder ring body and a holder cover extending inwardly from the upper end of the holder ring body, wherein the holder cover of the holder is arranged at the upper end of the upper group lens.

[0027] According to an embodiment of the present application, further comprising at least one lens gluing unit, wherein the lens gluing 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 through the lens gluing unit.

[0028] According to one embodiment of the present application, the adhesive material forming the lens adhesive unit is applied to the lower end surface of the holding member; or the adhesive material forming the lens adhesive unit is applied to the position of the lens barrel of the second lens assembly corresponding to the holding member, and the holding member is fixed to the lens barrel of the second lens assembly by the lens adhesive unit.

[0029] According to one embodiment of the present application, the lens adhesive unit comprises a first adhesive unit and a second adhesive unit, wherein the adhesive material forming the first adhesive unit is applied to the lower end surface of the holding member, and the adhesive material forming the second adhesive unit is applied to the lower end surface of the upper group lens.

[0030] According to one embodiment of the present application, further comprising a fixing member, wherein the fixing member is an optical lens black object, and the fixing member is arranged outside the holding member, and the fixing member fixedly connects the holding member to the second lens assembly.

[0031] According to one embodiment of the present application, the fixing member comprises a fixed connection body and an extension arm extending from the fixed connection body to the direction of the optical axis, wherein the fixed connection body is fixed to the second lens assembly, and the extension arm of the fixing member covers the structural area of the holding member and the upper group lens, so as to protect the upper group lens and the holding member.

[0032] According to one embodiment of the present application, the fixing member further comprises a blocking arm, wherein the blocking arm extends downwardly from the extension arm of the fixing member to the direction of the optical axis, and the blocking arm of the fixing member is located inside the holding member along the cover, so that the blocking arm blocks external stray light and reduces the entry of external dust into the interior of the first lens assembly.

[0033] According to one embodiment of the present application, the first lens assembly further comprises at least one holding member fixing adhesive and at least one fixing member fixing adhesive, wherein the holding member fixing adhesive is located between the holding member and the fixing member, and the fixing member fixing adhesive is located between the fixing member and the lens barrel.

[0034] According to one embodiment of the present application, the adhesive material forming the holding member fixing adhesive is applied to the upper end surface of the holding member along the cover, and the adhesive material forming the fixing member fixing adhesive is applied to the bearing table of the lens barrel.

[0035] According to one embodiment of the present application, an adjustment space is arranged between the holding member and the fixing member, wherein the adjustment space allows the holding member and the upper group lens to be movable, so as to prevent the holding member and the upper group lens from interfering with the fixing member after adjustment.

[0036] According to one embodiment of the present application, the fixing body of the fixing member is tightly fitted with the lens barrel of the second lens assembly, and the lens barrel further has a mounting groove side wall, the fixing member has a fixing member inner side wall, and the diameter of the fixing member inner side wall is 5-10 um smaller than the diameter of the mounting groove side wall.

[0037] According to another aspect of the present application, the present application further provides a manufacturing method of a split lens, comprising the following steps:

[0038] (1) applying an adhesive between a holding member and an upper group lens to bond the holding member and the upper group lens by the adhesive to obtain a first lens assembly, wherein the holding member is an optical lens black body, and the ratio between the CTE value of the holding member and the CTE value of the upper group lens is less than or equal to 6; and

[0039] (2) calibrating the relative position relationship between the first lens assembly and a second lens assembly, and arranging at least an adhesive between the first lens assembly and the second lens assembly, the adhesive is bonded and formed into a lens adhesive unit, and the first lens assembly and the second lens assembly are bonded by the lens adhesive unit.

[0040] According to one embodiment of the present application, the manufacturing method further comprises step (3) of installing a fixing member outside the second lens assembly and the holding member, and fixing the first lens assembly to the second lens assembly by the fixing member, wherein the fixing member is an optical lens black body.

[0041] According to one embodiment of the present application, in step (1) of the manufacturing method, the holding member and the upper group lens are inverted, and the upper group lens is installed in a fixed accommodating cavity of the holding member.

[0042] According to one embodiment of the present application, the upper group lens and the holding member are inverted, and the adhesive is applied between the holding member and the upper group lens to bond and form the upper group lens fixing body by the adhesive in the adhesive groove, wherein the adhesive does not protrude from the adhesive groove.

[0043] According to one embodiment of the present application, in the step (2) of the manufacturing method, one of the adhesive materials is arranged on a lower end surface of the holding member of the first lens assembly, and a first adhesive unit is formed by the adhesive material, so that the first adhesive unit bonds the holding member to the second lens assembly; another of the adhesive materials is arranged on a lower end surface of the upper group lens of the first lens assembly, and a second adhesive unit is formed by the adhesive material, so that the second adhesive unit bonds the upper group lens to the second lens assembly.

[0044] According to one embodiment of the present application, in the step (3) of the manufacturing method, the adhesive material is applied on the upper end surface of the holding member and a supporting table of a lens barrel of the second lens assembly, and the fixing member is fixed by the adhesive material above the supporting table of the second lens assembly and outside the holding member.

[0045] Further objects and advantages of the present application can be more fully understood and appreciated by reference to the following description taken in connection with the accompanying drawings.

[0046] The present application will be more fully understood and appreciated by reference to the following detailed description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 is a schematic view of a split lens according to a first preferred embodiment of the present application.

[0048] Figure 2 is a schematic view of the split lens according to the first preferred embodiment of the present application.

[0049] Figure 3 is a schematic view of a first lens assembly of the split lens according to the first preferred embodiment of the present application.

[0050] Figure 4 is a schematic view of a manufacturing process of the first lens assembly of the split lens according to the first preferred embodiment of the present application.

[0051] Figure 5 is a schematic view of the first lens assembly of the split lens according to the first preferred embodiment of the present application.

[0052] Figure 6A and Figure 6B is a schematic view of the first lens assembly and a second lens assembly of the split lens according to the first preferred embodiment of the present application.

[0053] Figure 7A and Figure 7B is a schematic view of a split lens according to a second preferred embodiment of the present application.

[0054] Figure 8 is a partial exploded view of the split lens according to the second preferred embodiment of the present application.

[0055] Figures 9A to 9C is a schematic view of the manufacturing process of the split lens according to the second preferred embodiment of the present application.

[0056] Figure 10 is a schematic view of the manufacturing process of the split lens according to a preferred embodiment of the present application. DETAILED DESCRIPTION

[0057] The following description is presented to enable any person skilled in the art to practice the application as claimed. The preferred embodiments disclosed herein are merely examples of the application and variations in adding details are considered to be within the scope of the present application. It is contemplated that those skilled in the art, in interpretation of the

[0058] Those skilled in the art will appreciate that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like as can be used herein, merely describe orientations in relation to the application as the same can be shown in the drawings and should not be construed to limit the present application, unless otherwise specified.

[0059] It should be understood that the term "one" should be understood as "at least one" or "one or more" unless explicitly indicated to the contrary or the context clearly dictates otherwise. The term "number" shall be construed in accordance with this understanding.

[0060] Reference is made to the accompanying drawings that form a part of this specification, wherein: Figures 1 to 6BAs shown, a split lens according to the first preferred embodiment of the present application is illustrated in the following description. The split lens comprises a first lens assembly 10 and a second lens assembly 20, wherein the first lens assembly 10 is arranged on the upper side of the second lens assembly 20, and the first lens assembly 10 and the second lens assembly 20 are fixedly connected by means of adhesion. Preferably, in this preferred embodiment of the present application, the optical axis direction of the first lens assembly 10 and the optical axis direction of the second lens assembly 20 are adapted to each other. 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.

[0061] The first lens assembly 10 comprises at least one upper group lens 11 and a holder 12 for fixing the at least one upper group lens 11, wherein the holder 12 is an optical lens holder, the at least one upper group lens 11 is fixedly held inside the holder 12, and the holder 12 fixes the upper group lens 11 to the second lens assembly 20. The second lens assembly 20 comprises at least one lower group lens 21 and a lens barrel 22 for fixing the lower group lens 21, wherein the lens barrel 22 fixedly supports the lower group lens 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 application, the number of the upper group lenses 11 of the first lens assembly 10 can be one, two or more, and the number of the upper group lenses 11 is only exemplary, not limiting.

[0062] The technical problems of the prior art corresponding to the present application.

[0063] In order to reduce the overall height of the lens and increase the resolving power of the lens, the prior art in the field often sets the first lens, i.e. the upper group lens, as a glass lens. Since the glass lens itself is an inorganic material, and the lens barrel for fixing the upper group lens is usually an organic material such as plastic, it is difficult to match the bonding strength of the two, and it is difficult to improve the bonding strength of the adhesive by improving the adhesive. On the other hand, the lens is in a high temperature and high pressure environment, and the external temperature becomes high, which can easily cause the overall expansion of the internal lens. Different types of materials result in different expansion coefficients. If the lens is fixed on the second lens component by the adhesive, and the adhesive itself expands after being heated, the CTE value of the adhesive itself is generally 90-110, and the CTE of the glass lens is about 10. As can be seen, once in a high temperature environment, the adhesive has the largest deformation. If the upper group lens is a glass lens, the deformation of the lens is much smaller than that of the adhesive in a high temperature environment, such as 85 degrees Celsius. Therefore, the adhesive fixing position on the lens deviates from the adhesive fixing position on the second lens component holder, which further increases the risk of lens breakage. When the upper group lens is a glass lens, the bonding strength is weakened, and the resistance to lens breakage caused by temperature changes is also increased.

[0064] In addition, in the field, in order to ensure the consistency of the injection molding of the lens barrel, the mainstream solution requires the material selected for the lens barrel to have low shrinkage. Therefore, the shrinkage rate of the mainstream material is mostly about 0.5%-1.5%, which is beneficial to the molding of the finished product. On the other hand, for lens barrel demolding, the material is required to have low viscosity and good demolding performance. In summary, in the field of optical lenses, there are not many general-purpose materials for lens barrels, mostly PC materials. On the other hand, since PC material is a high molecular material, the CTE of many components of the formula material is about 70-100. In the past, for 4-6 lens solutions, since the lens size is not too large, the optical system composed of the lens is not greatly affected by the small size changes. However, with 7-8 high-end lens solutions and large aperture solutions, the lens diameter and optical sensitivity are larger and more sensitive than 4-6 solutions. Therefore, there are now reliability improvement solutions for such high-end lens solutions in the industry.

[0065] Similarly, the lens barrel is in a high temperature and high pressure environment, and the external temperature is high, which can easily cause the lens barrel to expand as a whole. Unlike glue, which has a relatively high deformation amount in the length direction due to the amount of glue arranged, the lens barrel, as a housing for the lens outside, has the largest size among the lens components, and has a relatively high deformation amount in any direction compared to other components. For example, in a split lens scheme, the first lens component is fixed on the second lens component by the glue material, and the glue material, the first lens component, and the second lens component will all expand after being heated. Generally, the lower lens component has the largest volume and the largest deformation amount. At this time, the glue and the lower lens component have a deformation difference, and the glue and the upper lens component to be bonded also have a deformation difference. At this time, if the glue is considered alone, it will also cause a relative deformation error between the lower lens component and the upper lens component, and will crack the optical performance and bonding performance of the lens.

[0066] In this preferred embodiment of the present application, the upper group of lenses 11 is adhered inside the holding member 12, the holding member 12 is fixed to the upper side of the second lens assembly 20, i.e. the holding member 12 fixes the upper group of lenses 11 to the second lens assembly 20, and the ratio of the CTE value of the holding member 12 to the CTE value of the upper group of lenses 11 is less than or equal to 300%, so as to prevent the glue material arranged on the surface of the lens and the second lens component from being easily detached due to temperature changes.

[0067] It is worth mentioning that the holding member 12 can provide a buffering effect in temperature impact and mechanical impact reliability tests, because the holding member 12 increases the bonding length of the glue. The holding member 12 is installed on the outside of the upper group of lenses 11, and if it is subjected to stress or external force, the holding member 12 itself is more likely to compensate for stress, external force, etc. deformation through bending deformation, etc., thereby ensuring optical performance.

[0068] In another preferred embodiment, the CTE ratio of the holding member 12 and the upper group of lenses 11 is controlled to be within 2-6 times. The holding member 12, as a component extending the lateral size of the upper group of lenses 11, can increase the bonding area, provide more bonding space, enhance the bonding strength of the upper group of lenses 11, and prevent the upper group of lenses 11 from being detached under the influence of external force.

[0069] In the prior art, the upper group lens has glue on the side wall, and the glue has a higher CTE value than the lens. When the temperature changes, the size of the glue changes more dramatically than the lens. Therefore, during the conventional reliability temperature test, the upper group lens may be offset due to the tensile stress of the side glue, which may cause the upper group lens to deviate from the lower group lens. In the preferred embodiment of the present application, the bottom surface of the retaining member 12 can be provided with glue, and the increased bottom bonding area can compensate for the glue bonding on the side.

[0070] The upper group lens 11 of the first lens assembly 10 includes a light transmission area 111 and a structure area 112 extending outwardly from the light transmission area 111. The retaining member 12 of the first lens assembly 10 is fixedly connected to the structure area 112 of the upper group lens 11.

[0071] That is, in the preferred embodiment of the present application, 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 materials that are compatible with each other, the ratio of the CTE value of the retaining member 12 to the CTE value of the upper group lens 11 is less than or equal to 300%, so as to prevent the retaining member 12 and the upper group lens 11 from being broken due to high and low temperature impact.

[0072] For example, in the preferred embodiment of the present application, when the upper group lens 11 is made of plastic, the retaining member 12 is also made of plastic, or a mixture of plastic and mineral fiber, or glass fiber. When the upper group lens 11 is made of glass, the retaining member 12 can be made of metal or plastic with a high proportion of mineral fiber, or glass fiber, so as to meet the requirement that the CTE values of the upper group lens 11 and the retaining member 12 are similar. Preferably, in the preferred embodiment of the present application, when the upper group lens 11 is a glass lens, the CTE value of the glass lens is between 8 and 15. Correspondingly, the retaining member 12 is made of PC material with 30% carbon fiber, which has good demolding, bromine-free flame retardancy, a density of 1.3-1.5 g / cm2, a shrinkage rate of 0.25-0.45%, a bending strength of 80-100 mpa, a bending modulus of 4800-5200 mpa, a heat distortion temperature of 120-140℃, and requires high flexibility and impact performance. In addition, the CTE of the preferred material is 38-42, so as to achieve a CTE value close to that of the glass lens. Therefore, the ratio of the CTE value of the retaining member 12 to the CTE value of the upper group lens 11 is less than or equal to 300%.

[0073] The retaining member 12 has a fixed receiving cavity 1201 and a light-entry cavity 1202 communicating with it. The upper lens group 11 is fixed in the fixed receiving cavity 1201 of the retaining member 12, and external light can enter the upper lens group 11 through the light-entry cavity 1202. The retaining member 12 is further provided with an upper end surface 1203 and a lower end surface 1204. The opening of the fixed receiving cavity 1201 of the retaining member 12 is located on the lower end surface 1204 of the retaining member 12, and the light-entry cavity 1202 of the retaining member 12 is located on the upper end surface 1203 of the retaining member 12. That is, the fixed receiving cavity 1201 is located on the backlight side of the retaining member 12, and the light-entry cavity 1202 is located on the light-entry side of the retaining member 12.

[0074] Preferably, in this preferred embodiment of the present invention, the retainer 12 is fixed to the upper lens group 11 by adhesive. Accordingly, the first lens assembly 10 further includes at least one upper lens group fixing adhesive 13, which is fixedly connected to the upper lens group 11 in the fixing receiving cavity 1201 of the retainer 12.

[0075] At least one adhesive groove 101 is further provided between the upper lens 11 and the retainer 12, wherein the upper lens fixing adhesive 13 is located in the adhesive groove 101 of the retainer 12. The adhesive groove 101 communicates with the fixing receiving cavity 1201 of the retainer 12, wherein the adhesive material forming the upper lens fixing adhesive 13 is applied to the adhesive groove 101, and the adhesive material cures to form the upper lens fixing adhesive 13. Preferably, the adhesive groove 101 is formed in the retainer 12, wherein the retainer 12 further has an inner sidewall 1206 of the receiving cavity, wherein the adhesive groove 101 of the retainer 12 extends inward and downward from the lower end face 1204 of the retainer 12 to the inner sidewall 1206 of the receiving cavity of the retainer 12.

[0076] like Figure 4 As shown, the retainer 12 is inverted, and the upper lens 11 is placed in the fixing cavity 1201 of the retainer 12 through the lower end opening of the retainer 12, wherein the upper lens 11 and the retainer 12 together define the adhesive groove 101. Adhesive material is applied to the adhesive groove 101 between the retainer 12 and the upper lens 11, and after the adhesive material cures, it forms the upper lens fixing adhesive 13 in the adhesive groove 101.

[0077] Optionally, in other optional embodiments of the present application, the glue groove 101 is formed in the upper group lens 11, wherein the upper group lens 11 has an outer sidewall 110, and the glue groove 101 extends upwardly and inwardly from the outer sidewall 110 of the upper group lens 11 to an upper surface of the upper group lens 11. Optionally, in other optional embodiments of the present application, the glue groove 101 can also be formed in the upper group lens 11 and the holder 12. It can be understood that the glue material forming the upper group lens fixing glue 13 is formed in the glue groove 101, and fixedly connects the upper group lens 11 to the holder 12.

[0078] It is worth mentioning that the opening of the glue groove 101 defined by the holder 12 and the upper group lens 11 faces the backlight side, and the glue material is filled in the glue groove 101 from the backlight side of the first lens assembly 10 in the case of inverting the holder 12. Therefore, during the process of glue application and glue bonding formation, the glue material in the glue groove 101 is beneficial to prevent glue material overflow. In addition, the glue material applied in the glue groove 101 can seep into the gap between the upper group lens 11 and the holder 12 under the action of gravity, thereby further fixing the upper group lens 11 and the holder 12 by glue, and improving the reliability of the lens bonding.

[0079] As shown in Figure 4 The holder 12 includes a holder ring body 121 and a holder side cover 122 extending inwardly from the upper end of the holder ring body, wherein the holder ring body 121 and the holder side cover 122 jointly form the fixing accommodating cavity 1201 and the light inlet cavity 1202. The holder side cover 122 of the holder 12 covers the upper end of the upper group lens 11, or the upper group lens 11 is fixed below the holder side cover 122. The holder side cover 122 has a side cover lower end face 1221, a side cover upper end face 1222, and a light collecting face 1223 extending downwardly and inwardly from the side cover upper end face 1222, wherein the light collecting face 1223 of the holder side cover 122 surrounds the outer periphery of the light inlet cavity 1202. Therefore, the upper end opening of the light inlet cavity 1202 of the holder side cover 122 is larger than the lower end opening, which is beneficial to converge the light on the light inlet side into the upper group lens 11.

[0080] The holder side cover 122 of the holder 12 is located at the outer edge of the structure area 112 of the upper group lens 11, and the holder 12 buckles the upper group lens 11, thereby preventing the upper group lens 11 from moving up and down.

[0081] As shown in Figure 6A and Figure 6BAs shown, the retainer 12 is fixed to the lens barrel 22 of the second lens assembly 20 by adhesive. The split lens further includes at least one lens adhesive unit 30, wherein the lens adhesive unit 30 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 adhesive unit 30.

[0082] like Figure 6A As shown, in this preferred embodiment of the present invention, the lens adhesive unit 30 is disposed between the retainer 12 of the first lens assembly 10 and the lens barrel 22 of the second lens assembly 20, thereby bonding and fixing the retainer 12 to the lens barrel 22 of the second lens assembly 20 by means of the lens adhesive unit 30. Preferably, in this preferred embodiment of the present invention, the adhesive material forming the lens adhesive unit 30 is applied to the lower end surface 1204 of the retainer 12; or the adhesive material forming the lens adhesive unit 30 is applied to the position of the lens barrel 22 of the second lens assembly 20 corresponding to the retainer 12. It can be understood that in this preferred embodiment of the present invention, no adhesive material is provided between the upper lens group 11 of the first lens assembly 10 and the second lens assembly 20, the upper lens group 11 is fixed by means of the retainer 12, and the upper lens group 11 is fixedly connected to the second lens assembly 20 by means of the retainer 12, thereby keeping the relative position of the upper lens group 11 and the second lens assembly 20 fixed.

[0083] like Figure 6B As shown, in this preferred embodiment of the present invention, the lens adhesive unit 30 further includes a first adhesive unit 31 and a second adhesive unit 32. The first adhesive unit 31 is disposed between the retainer 12 of the first lens assembly 10 and the lens barrel 22 of the second lens assembly 20, i.e., the retainer 12 is bonded and fixed to the lens barrel 22 of the second lens assembly 20 by the first adhesive unit 31. The second adhesive unit 32 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, thereby fixing the upper lens group 11 to the second lens assembly 20 by the second adhesive unit 32.

[0084] Preferably, the adhesive material forming the first adhesive unit 31 is applied to the lower end surface 1204 of the retainer 12, and the adhesive material forming the second adhesive unit 32 is applied to the lower end surface of the upper lens group 11. It is understood that applying adhesive material in two locations increases the bonding strength of the split lens and prevents poor bonding due to external impacts, temperature changes, etc.

[0085] It is worth mentioning that the adhesive material described in the present application can be, but is not limited to, UV adhesive, heat-curing adhesive, or UV heat-curing adhesive, etc.

[0086] The lens barrel 22 has a lens barrel upper end surface 220, wherein the lens adhesive unit 30 adheres to the lens barrel upper end surface 220 of the lens barrel 22, and the lens barrel upper end surface 220 of the lens barrel 22 is fixedly connected to the lower end surface of the holder 12 and the lower surface of the upper group lens 11 by the lens adhesive unit 30.

[0087] Referring to the drawings of the present application Figures 7A to 8 As shown in the drawings, a split lens according to a second preferred embodiment of the present application is illustrated in the following description. Different from the first preferred embodiment described above, the first lens assembly 10 of the split lens further comprises a fixing member 14, wherein the fixing member 14 is an optical lens black member, and the fixing member 14 is arranged outside the holder 12, and the holder 12 is fixedly connected to the second lens assembly 20 by the fixing member 14. In short, in this preferred embodiment of the present application, compared with the split lens of the first preferred embodiment, the present application further increases a fixing member 14.

[0088] The fixing member 14 is fixedly adhered to the outside of the holder 12 and the second lens assembly 20 by adhesive material, and the relative position of the upper group lens 11 of the first lens assembly 10 relative to the second lens assembly 20 is further fixed by the fixing member 14, which improves the reliability of lens adhesion and reduces the situation that the adhesion strength is weakened due to temperature impact of the black member and the lens.

[0089] The fixing member 14 comprises a fixed connection main body 141 and an extension arm 142 extending from the fixed connection main body 141 to the optical axis direction, wherein the fixed connection main body 141 is fixed to the second lens assembly 20, and the extension arm 142 of the fixing member 14 covers the structure area 112 of the holder 12 and the upper group lens 11 to protect the upper group lens 11 and the holder 12. The fixed connection main body 141 of the fixing member 14 has a ring structure, and the lower end of the fixed connection main body 141 is fixedly connected to the lens barrel 22 of the second lens assembly 20 by adhesive material.

[0090] The lens barrel 22 further has a bearing table 221, and the fixed connection main body 141 of the fixing member 14 is fixed to the bearing table 221 of the lens barrel 22. Preferably, in this preferred embodiment of the present application, the bearing table 221 of the lens barrel 22 is formed on the outside of the lens barrel 22, i.e. the bearing table 221 of the lens barrel 22 extends downward from the lens barrel upper end surface 220 of the lens barrel 22.

[0091] The fixing member 14 further comprises a blocking arm 143, wherein the blocking arm 143 extends downwardly and obliquely from the extension arm 142 of the fixing member 14 toward the optical axis direction, and the blocking arm 143 of the fixing member 14 is located inside the retaining member cover 122 of the retaining member 12, so that the blocking arm 143 blocks external stray light and reduces the entry of external dust into the interior of the first lens assembly 10. The retaining member cover 122 of the retaining member 12 covers the outside of the structure area 112 of the upper group lens 11, and one end of the blocking arm 143 covers the inside of the structure area 112 of the upper group lens 11 and above the retaining member cover 122 of the retaining member 12. Therefore, in this preferred embodiment of the present application, the position of the upper group lens 11 is further maintained by the blocking arm 143 of the fixing member 14, and the entry of external dust and stray light is blocked.

[0092] The blocking arm 143 of the fixing member 14 has an inner inclined surface 1431, an outer inclined surface 1432, and a pressing surface 1433 located between the inner inclined surface 1431 and the outer inclined surface 1432, wherein the pressing surface 1433 of the blocking arm 143 is tightly attached to the inside of the structure area 112 of the upper group lens 11. The outer inclined surface 1432 of the blocking arm 143 extends upwardly and obliquely outwardly from the pressing surface 1433 to the extension arm 142 of the fixing member 14, and forms a light collecting space inside the outer inclined surface 1432 of the fixing member 14, which is beneficial for the light from the external environment to enter the upper group lens 11 through the light collecting space. Preferably, in this preferred embodiment of the present application, the inner inclined surface 1431 of the blocking arm 143 is adapted to the light collecting surface 1223 of the retaining member cover 122 of the retaining member 12, that is, the inner inclined surface 1431 of the blocking arm 143 is fitted with the light collecting surface 1223 of the retaining member 12.

[0093] The fixing member 14 is fixedly connected with the holding member 12 and the lens barrel 22 of the second lens assembly 20 by means of adhesion, so as to further fix the holding member 12 and the upper group lens 11 above the second lens assembly 20 by the fixing member 14. Accordingly, the first lens assembly 10 further comprises at least one holding member fixing adhesive 15 and at least one fixing member fixing adhesive 16, wherein the holding member fixing adhesive 15 is located between the holding member 12 and the fixing member 14, and the fixing member fixing adhesive 16 is located between the fixing member 14 and the lens barrel 22, so as to fixedly bond the holding member 12 and the fixing member 14 by the holding member fixing adhesive 15, and fixedly bond the fixing member 14 and the lens barrel 22 by the fixing member fixing adhesive 16. In other words, in this preferred embodiment of the present application, the holding member 12 can be fixedly bonded by the fixing member 14, and the upper group lens 11 can be further held above the lens barrel 22 by the fixing member 14.

[0094] Alternatively, in another optional embodiment of the present application, no adhesive is arranged between the fixing member 14 and the holding member 12, and the adhesive is only arranged between the fixing member 14 and the lens barrel 22, i.e. the scheme of not arranging adhesive between the fixing member 14 and the holding member 12 can realize the isolation bonding of the upper group lens 11. Since the larger the size of the lens barrel 22 is, the greater the size change of the lens barrel 22 is when the temperature changes, at this time, the holding member 12 is only fixed by adhesive with the lower group lens barrel 22. No adhesive is arranged between the holding member 12 and the fixing member 14, i.e. in this embodiment, no holding member fixing adhesive is arranged between the holding member 12 and the fixing member 14. The deformation amount of the adhesive is far less than the deformation amount of the fixing member 14, so in this scheme, the holding member 12 can isolate the upper group lens 11 from the temperature change of the large size black object in the external environment, and the optimization of the size and structure of the holding member 12 itself can reduce the deformation of the holding member 12 itself, so this scheme can isolate the internal lens from the deformation of the external environment. The fixing member 14 is bonded to the bearing table 221 of the lens barrel 22 by the fixing member fixing adhesive 16. Preferably, in this preferred embodiment of the present application, the adhesive for forming the holding member fixing adhesive 15 is applied to the upper end surface of the holding member along cover 122 of the holding member 12, and the adhesive for forming the fixing member fixing adhesive 16 is applied to the bearing table 221 of the lens barrel 22. Preferably, in this preferred embodiment of the present application, the bearing table 221 of the lens barrel 22 is formed on the outside of the fixing member upper end surface 220.

[0095] Preferably, in this preferred embodiment of the present application, the fixing member 14 is an optical lens black product, wherein the material of the fixing member 14 is preferably PC material, wherein the material has low and well viscosity demoulding properties, and the material has a density of 1.14-1.24 g / cm2, a shrinkage of 0.5-0.8%, a bending strength of 60-80 mpa, a bending modulus of 2200-2600 mpa, and a heat distortion temperature of 120-140℃. Preferably, the CTE value of the material of the fixing member 14 of the present application is between 68-72.

[0096] As shown in Figure 8 , the holding member 12 is fixed by the fixing member 14 in an installation space of the fixing member 14, and an adjustment space 100 is provided between the holding member 12 and the fixing member 14, wherein the adjustment space 100 allows the holding member 12 and the upper group lens 11 to move along the X-axis direction and / or the Y-axis direction, so as to prevent the holding member 12 and the upper group lens 11 from interfering with the fixing member 14 after adjustment.

[0097] The fixing member 14 has a fixing member inner side wall 144, wherein the fixing member inner side wall 144 is located at the inner side of the fixing connection body 141 of the fixing member 14. The holding member 12 has a holding member outer side wall 123, wherein the holding member outer side wall 123 is located at the outer side of the holding member ring body 121 of the holding member 12, and the adjustment space 100 is formed between the fixing member inner side wall 144 of the fixing member 14 and the holding member outer side wall 123, so as to allow the holding member 12 and the upper group lens 11 to have a certain adjustment freedom in the adjustment space 100 along the X-axis, Y-axis and Z-axis directions.

[0098] Preferably, in this preferred embodiment of the present application, the holding member 12 and the upper group lens 11 are allowed to have an adjustment freedom of 5° in the adjustment space 100 along the X-axis, Y-axis and Z-axis directions, or a displacement adjustment space of 30-80 um in any spatial direction.

[0099] It is worth mentioning that the adjustment space 100 between the holding member 12 and the fixing member 14 can also accommodate the glue material for forming the holding member fixing glue body 15, that is, when the glue material is applied to the upper surface of the holding member 12, the excess glue material can be accommodated in the adjustment space 100, so as to prevent the glue material from overflowing.

[0100] Preferably, in the preferred embodiment of the present application, the lower end of the fixing member 14 is fixed to the outside of the lens barrel 22 of the second lens assembly 20, wherein the fixed connection body 141 of the fixing member 14 is tightly fitted with the lens barrel 22 of the second lens assembly 20. The lens barrel 22 further has a mounting groove side wall 222, wherein the mounting groove side wall 222 is tightly fitted with the fixing member inner side wall 144 of the fixing member 14. Preferably, the diameter of the fixing member inner side wall 144 of the fixing member 14 is 5-10 um smaller than the diameter of the mounting groove side wall 222 of the lens barrel 22, so as to ensure that the fixing member 14 can be assembled to the outside of the lens barrel 22 by mechanical assembly.

[0101] It is worth mentioning that the holding member 12 and the fixing member 14 are fixedly bonded by the holding member fixing glue 15, so as to strengthen the connection between the holding member 12 and the fixing member 14. When the fixing member 14 is subjected to impact, part of the impact force of the fixing member 14 is transmitted to the holding member 12 through the holding member fixing glue 15, so as to prevent the fixing member 14 from falling off.

[0102] In an embodiment of the present application, the holding member 12 and the fixing member 14 are connected as an integral structure, wherein the materials of the holding member 12 and the fixing member 14 are the same, and can offset the deformation size of each other as a whole when subjected to temperature change, so as to reduce the shape deformation.

[0103] It is worth mentioning that the glue material forming the holding member fixing glue 15 is applied to the upper end face 1203 of the holding member 12, so as to prevent the displacement of the center of the lens caused by the glue material arranged in the transverse direction, thereby preventing the problem of the overall lens offset, and preventing the problem of the first lens assembly 10 falling off caused by the transverse force.

[0104] It is worth mentioning that, in the preferred embodiment of the present application, the height of the holding member 12 in the first lens assembly is at least 50 um higher than the height of the structure area 112 of the upper group lens 11, and the height of the holding member 12 is as small as possible, so as to improve the space of the holding member 12 and the upper group lens in the outer side black object, thereby reducing the size of the lens. As an example, in the preferred embodiment of the present application, the height of the holding member 12 is 0.4-0.8 mm, and the outer diameter size is 5-9 mm, wherein the height of the upper group lens 11 is 0.8-1.5 mm, and the outer diameter size is 4-7 mm.

[0105] In addition, the height of the fixing member 14 is slightly higher than the overall height of the upper group lens 11, so as to prevent foreign matters from interfering with the upper group lens 11 of the first lens assembly 10.

[0106] Reference will now be made to the drawings accompanying the specification, which will further Figures 9A to 10 As shown in the drawings, according to another aspect of the present application, the present application further provides a manufacturing method of a split lens. First, a holding member 12 and at least one upper group lens 11 are prepared, the holding member 12 is inverted, and the upper group lens 11 is installed to a fixed accommodating cavity 1201 of the holding member 12. After the holding member 12 and the upper group lens 11 are fixed in an inverted manner, glue is applied to a glue groove 101 between the holding member 12 and the upper group lens 11, and the upper group lens 11 is bonded and fixed to the fixed accommodating cavity 1201 of the holding member 12 by the glue. The glue applied in the glue groove 101 is bonded and formed into an upper group lens fixing glue body 13, the upper group lens 11 and the holding member 12 are bonded and fixed by the upper group lens fixing glue body 13, so as to obtain a first lens assembly 10.

[0107] In the above step, the upper group lens 11 and the holding member 12 after being inverted are painted with glue, and glue is applied to the side surface of the upper group lens 11 and the glue groove 101 between the holding member 12 and the upper group lens 11. It is worth mentioning that, in the preferred embodiment of the present application, the glue applied does not protrude from the opening of the glue groove 101, so as to prevent the adjustment interference problem caused by the protruding glue during the subsequent calibration. In other words, the upper group lens fixing glue body 13 formed in the glue groove 101 does not protrude from the opening of the glue groove 101.

[0108] It is worth mentioning that, in the preferred embodiment of the present application, the holding member 12 is an optical lens black body, and the ratio between the CTE value of the holding member 12 and the CTE value of the upper group lens 11 is less than or equal to 300%, so as to prevent the risk of easy falling off of the glue arranged between the lens and the surface of the second lens component in the case of temperature change.

[0109] For example, in the preferred embodiment of the present application, when the upper group lens 11 is made of plastic material, the holding member 12 is also made of plastic material; or a mixture of plastic and mineral fiber; or glass fiber material. When the upper group lens 11 is made of glass material, the holding member 12 can be made of metal material or plastic material with a high proportion of mineral fiber; or glass fiber material, so as to meet the requirement of similar CTE values of the upper group lens 11 and the holding member 12.

[0110] The first lens assembly 10 and a second lens assembly 20 are prepared, and the relative position relationship between the first lens assembly 10 and the second lens assembly 20 is calibrated, wherein the first lens assembly 10 is located above the second lens assembly 20. At least one adhesive material is arranged between the first lens assembly 10 and the second lens assembly 20, wherein the adhesive material bonds the first lens assembly 10 and the second lens assembly 20, and at least one lens adhesive unit 30 is formed between the first lens assembly 10 and the second lens assembly 20. Preferably, one of the adhesive materials is arranged on a lower end surface 1204 of the holder 12 of the first lens assembly 10, and a first adhesive unit 31 is formed by bonding the adhesive material, so that the first adhesive unit 31 bonds the holder 12 to the second lens assembly 20; another adhesive material is arranged on a lower end surface of the upper group of lenses 11 of the first lens assembly 10, and a second adhesive unit 32 is formed by bonding the adhesive material, so that the second adhesive unit 32 bonds the upper group of lenses 11 to the second lens assembly 20. By arranging two adhesive materials, the bonding strength of the split lens can be increased, and the phenomenon of poor bonding caused by external impact, temperature change, etc. can be prevented.

[0111] Optionally, the adhesive material is arranged on a lower end surface 1204 of the holder 12 of the first lens assembly 10, and a first adhesive unit 31 is formed by bonding the adhesive material, so that the first adhesive unit 31 bonds the holder 12 to the second lens assembly 20.

[0112] A fixing member 14 is mounted on the outside of the second lens assembly 20 and the holder 12, and the first lens assembly 10 is fixed to the second lens assembly 20 by the fixing member 14, wherein the fixing member 14 is an optical lens black object. An adhesive material is applied to a bearing table 221 of a lens barrel 22 of the second lens assembly 20 and an upper end surface 1203 of the holder 12, wherein the fixing member 14 is fixed above the bearing table of the second lens assembly 20 and outside the holder 12 by the adhesive material.

[0113] The manufacturing method of the split lens comprises the following steps:

[0114] (1) An adhesive material is applied to a glue groove 101 between a holder 12 and an upper group of lenses 11, and the holder 12 and the upper group of lenses 11 are bonded and fixed by the adhesive material to obtain a first lens assembly 10, wherein the holder is an optical lens black object, and the ratio between the CTE value of the holder 12 and the CTE value of the upper group of lenses 11 is less than or equal to 300%; and

[0115] (2) calibrating the relative position relationship of the first lens assembly 10 and a second lens assembly 20, and arranging at least one adhesive material between the first lens assembly 10 and the second lens assembly 20, the adhesive material being bonded and formed into a lens adhesive unit 30, and the first lens assembly 10 and the second lens assembly 20 being bonded by the lens adhesive unit 30.

[0116] According to the manufacturing method of the split lens of the above-mentioned preferred embodiment of the present application, the manufacturing method further comprises step (3), a fixing member 14 is installed on the outside of the second lens assembly 20 and the holding member 12, and the first lens assembly 10 is fixed to the second lens assembly 20 by the fixing member 14, wherein the fixing member 14 is an optical lens black object.

[0117] In step (1) of the manufacturing method of the split lens, the holding member 12 and the upper group lens 11 are inverted, and the upper group lens 11 is installed in a fixed accommodating cavity 1201 of the holding member 12. The upper group lens 11 and the holding member 12 are kept inverted, and adhesive material is applied in the adhesive groove between the holding member 12 and the upper group lens 11 to be bonded and formed into the upper group lens fixing adhesive body 13 by the adhesive material in the adhesive groove 101, wherein the adhesive material does not protrude from the adhesive groove 101. When the upper group lens 11 is made of plastic material, the holding member 12 is also made of plastic material; or a mixture of plastic and mineral fiber; or glass fiber material. When the upper group lens 11 is made of glass material, the holding member 12 can be made of metal material or plastic material with a high proportion of mineral fiber; or glass fiber material, to meet the requirement that the CTE values of the upper group lens 11 and the holding member 12 are similar.

[0118] In step (2) of the manufacturing method of the split lens, one of the adhesive materials is arranged on a lower end surface 1204 of the holding member 12 of the first lens assembly 10, and is bonded to form a first adhesive unit 31, so that the first adhesive unit 31 bonds the holding member 12 to the second lens assembly 20; another of the adhesive materials is arranged on a lower end surface of the upper group lens 11 of the first lens assembly 10, and is bonded to form a second adhesive unit 32, so that the second adhesive unit 32 bonds the upper group lens 11 to the second lens assembly 20. Alternatively, in step (2) of the manufacturing method of the split lens, the adhesive material is arranged on a lower end surface 1204 of the holding member 12 of the first lens assembly 10, and is bonded to form a first adhesive unit 31, so that the first adhesive unit 31 bonds the holding member 12 to the second lens assembly 20.

[0119] In the step (3) of the manufacturing method of the split lens, glue is applied to the upper end surface 1203 of the holding member 12 and a bearing table 221 of a lens barrel 22 of the second lens assembly 20, and the fixing member 14 is fixed by the glue above the bearing table of the second lens assembly 20 and outside the holding member 12.

[0120] Those skilled in the art will understand that the above description and the embodiments of the application shown in the drawings are only examples and do not limit the application. The purpose of the application has been fully and effectively achieved. The function and structural principles of the application have been shown and described in the embodiments, and the embodiments of the application can be modified or changed in any way without departing from the principles.

Claims

1. A split lens, characterized by, The split lens comprises: a first lens assembly; a second lens assembly, wherein the first lens assembly is fixed above the second lens assembly, the first lens assembly comprises at least one upper group lens and a holding member, wherein the upper group lens is bonded to the holding member, the holding member is fixed with the second lens assembly, and the ratio of the CTE value of the holding member to the CTE value of the upper group lens is between 2 and 6; and a fixing member, wherein the fixing member is arranged outside the holding member, and the fixing member fixedly connects the holding member to the second lens assembly, and the fixing member is an optical lens black object.

2. The split lens according to claim 1, wherein the ratio of the CTE value of the holding member to the CTE value of the upper group lens is less than or equal to 300%.

3. The split lens according to claim 2, wherein the upper group lens comprises a light transmission area and a structure area integrally extending outward from the light transmission area, and the holding member of the first lens assembly is bonded to the structure area of the upper group lens.

4. The split lens according to claim 1, wherein when the upper group lens is made of plastic material, the holding member is made of plastic material, or a mixture of plastic and mineral fiber, or glass fiber material; or when the upper group lens is made of glass material, the holding member is made of metal material, or glass fiber material.

5. The split lens according to any one of claims 1 to 4, wherein the holding member has a fixing accommodating cavity and a light inlet cavity in communication with each other, the upper group lens is fixed in the fixing accommodating cavity of the holding member, the fixing accommodating cavity is located at the back light side of the holding member, and the light inlet cavity is located at the light inlet side of the holding member.

6. The split lens according to claim 5, wherein the first lens assembly further comprises an upper group lens fixing glue, and at least one glue groove is arranged between the holding member and the upper group lens, wherein the glue groove communicates with the fixing accommodating cavity of the holding member, and the upper group lens fixing glue is formed in the glue groove.

7. The split lens according to claim 6, wherein the glue groove is formed in the holding member, and the holding member further has an accommodating cavity inner side wall, wherein the glue groove of the holding member extends inward and downward from the lower end surface of the holding member to the accommodating cavity inner side wall of the holding member.

8. The split lens according to claim 5, wherein the holding member comprises a holding member ring body and a holding member cover extending inward from the upper end of the holding member ring body, and the holding member cover of the holding member covers the upper end of the upper group lens.

9. The split lens according to claim 5, further comprising at least one lens gluing unit, wherein the lens gluing 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 gluing unit. ​ 10. The split lens according to claim 9, wherein the lens adhesive unit is formed by applying an adhesive material to a lower end surface of the holding member; or the lens adhesive unit is formed by applying an adhesive material to a position of the lens barrel of the second lens assembly corresponding to the holding member, and the holding member is fixed to the lens barrel of the second lens assembly by the lens adhesive unit.

11. The split lens according to claim 9, wherein the lens adhesive unit comprises a first adhesive unit and a second adhesive unit, wherein the first adhesive unit is formed by applying an adhesive material to a lower end surface of the holding member, and the second adhesive unit is formed by applying the adhesive material to a lower end surface of the upper group lens.

12. The split lens according to claim 8, wherein the fixing member comprises a fixing connection body and an extension arm extending from the fixing connection body toward the optical axis, wherein the fixing connection body is fixed to the second lens assembly, and the extension arm of the fixing member covers the structural region of the holding member and the upper group lens to protect the upper group lens and the holding member.

13. The split lens according to claim 12, wherein the fixing member further comprises a blocking arm, wherein the blocking arm extends downwardly from the extension arm of the fixing member toward the optical axis, and the blocking arm of the fixing member is located on the holding member cover inner side of the holding member, so that the blocking arm blocks stray light from the outside and reduces the entry of dust from the outside into the interior of the first lens assembly.

14. The split lens according to claim 13, wherein the first lens assembly further comprises at least one fixing member fixing adhesive, wherein the fixing member fixing adhesive is located between the fixing member and the lens barrel of the second lens assembly.

15. The split lens according to claim 14, wherein the first lens assembly further comprises at least one holding member fixing adhesive, wherein the holding member fixing adhesive is located between the fixing member and the holding member, wherein the holding member fixing adhesive is formed by applying an adhesive material to an upper end surface of the holding member cover of the holding member, and the fixing member fixing adhesive is formed by applying an adhesive material to the bearing platform of the lens barrel.

16. The split lens according to claim 8, wherein an adjustment space is provided between the holding member and the fixing member, wherein the adjustment space allows the holding member and the upper group lens to move, so as to prevent the holding member and the upper group lens from interfering with the fixing member after adjustment.

17. The split lens according to claim 12, wherein the fixing connection body of the fixing member is tightly fitted with the lens barrel of the second lens assembly, the lens barrel further has a mounting groove sidewall, the fixing member has a fixing member inner sidewall, and the diameter of the fixing member inner sidewall of the fixing member is 5-10 um smaller than the diameter of the mounting groove sidewall of the lens barrel.

18. A method of manufacturing a split lens, characterized by, The manufacturing method comprises the following steps: (1) applying an adhesive between a holding member and an upper group lens to form an adhesive groove, and bonding the holding member and the upper group lens by the adhesive to form a first lens assembly, wherein the holding member is an optical lens holder, and a ratio between a CTE value of the holding member and a CTE value of the upper group lens is between 2 and 6; (2) aligning relative positions of the first lens assembly and a second lens assembly, and arranging at least one adhesive between the first lens assembly and the second lens assembly, and bonding the first lens assembly and the second lens assembly by the adhesive to form a lens adhesive unit; (3) mounting a fixing member outside the second lens assembly and the holding member, and fixing the first lens assembly to the second lens assembly by the fixing member, wherein the fixing member is an optical lens holder.

19. The manufacturing method of claim 18, wherein in step (1) of the manufacturing method, the holding member and the upper group lens are inverted, and the upper group lens is mounted in a fixed accommodating cavity of the holding member.

20. The manufacturing method of claim 19, wherein the upper group lens and the holding member are inverted, and an adhesive is applied between the holding member and the upper group lens to form an adhesive body of the upper group lens by the adhesive in the adhesive groove, wherein the adhesive does not protrude from the adhesive groove.

21. The manufacturing method of claim 19, wherein in step (2) of the manufacturing method, one of the adhesive is arranged on a lower end surface of the holding member of the first lens assembly, and a first adhesive unit is formed by the adhesive, so that the first adhesive unit bonds the holding member to the second lens assembly; and another of the adhesive is arranged on a lower end surface of the upper group lens of the first lens assembly, and a second adhesive unit is formed by the adhesive, so that the second adhesive unit bonds the upper group lens to the second lens assembly.

22. The manufacturing method of claim 19, wherein in step (3) of the manufacturing method, an adhesive is applied on an upper end surface of the holding member and a supporting platform of a lens barrel of the second lens assembly, and the fixing member is fixed above the supporting platform of the second lens assembly and outside the holding member by the adhesive.

Images