A processing method for side-cemented lens group

Abstract

The present application relates to the technical field of optical lens processing, and provides a processing method for a side-glued lens group, comprising the following steps: prefabricate a plurality of convex lenses, wherein the convex lenses have convex curved surfaces; sequentially arrange the convex lenses on a plane crystal, so that the convex curved surfaces of the convex lenses contact the plane crystal, and pre-gluing the adjacent convex lenses; observe the aperture on the plane crystal in a light source environment, and adjust the optical axis parallelism between each convex lens to a first preset range according to the position of the aperture; use a linear light source emitter to illuminate the top of the pre-glued lens group, observe the surface reflection image on the pre-glued lens group, and adjust the optical axis parallelism between each convex lens to a second preset range according to the surface reflection image. Compared with the traditional method, this processing method can achieve controllable parallel accuracy of the optical axis of the lens group and improve the product yield.

Description

Technical Field

[0001] The present application relates to the technical field of optical lens processing, and more specifically, to a processing method for a side-cemented lens group. Background Art

[0002] The lens is one of the commonly used optical devices in the optical system, and the lens group is two or more lenses assembled and fixed by gluing.

[0003] The existing technology mostly glues lenses or lens groups by positioning them according to their shape. However, when gluing products with convex surfaces as the positioning part, the lenses are not easy to place steadily and the optical axis is prone to tilt. It is impossible to accurately position the lenses only by their shape. The optical indicators of the lens group obtained by gluing cannot be guaranteed, thus affecting the yield rate of the lens group.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the invention

[0005] The purpose of the present application is to propose a processing method for a side-bonded lens group to solve the technical problem of low yield of lens group products bonded by shape positioning in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a processing method for a side-cemented lens group, comprising the following steps:

[0007] Prefabricate a plurality of convex lenses, wherein the convex lenses have convex curved surfaces;

[0008] Apply L-shaped positioning fixture of glazing glue on the flat wafer and form L-shaped positioning angle;

[0009] By limiting the position of the L-shaped positioning angle, convex lenses are sequentially arranged on the plane flat crystal, so that the convex curved surface of the convex lens contacts the plane flat crystal, and adjacent convex lenses are pre-glued to form a pre-glued lens group;

[0010] Observe the aperture on the plane crystal in a light source environment, and adjust the parallelism of the optical axes between the convex lenses to a first preset range according to the position of the aperture;

[0011] Using a linear light source emitter to illuminate the top of the pre-glued lens group, observing the surface reflection image on the pre-glued lens group, and adjusting the parallelism of the optical axes between the convex lenses to a second preset range according to the surface reflection image, wherein the accuracy of the second preset range is higher than that of the first preset range;

[0012] The bonding parts between the convex lenses are cured to form a bonded lens group, and the L-shaped positioning fixture and the flat crystal are removed to obtain a bonded lens group.

[0013] Furthermore, the convex lens is in the shape of an elongated strip and includes a first light-transmitting surface, a second light-transmitting surface, two long side surfaces and two short side surfaces; the prefabricated plurality of convex lenses specifically includes:

[0014] The second light-transmitting surface is processed into a convex curved surface, and the long side surface and the short side surface are processed into frosted flat surfaces.

[0015] Furthermore, the center deviation of each lens is no greater than a first preset tolerance value, the second end surface includes a spherical surface and an ellipsoidal surface, and the perpendicularity deviation between the second end surface and the long side surface and the short side surface is no greater than a second preset tolerance.

[0016] Further, the L-shaped positioning tool comprises two prism toolings, each of which is provided with two bottom surfaces, two end planes and two side planes in opposite positions; the L-shaped positioning tooling for applying the glossy adhesive on the flat wafer and forming an L-shaped positioning angle specifically comprises:

[0017] Glue the bottom surface of the first prism tooling onto the flat crystal, glue the bottom surface of the second prism tooling onto the flat crystal, and attach the end plane of the second prism tooling to the side plane of the first prism tooling. The side plane of the first prism tooling and the side plane of the second prism tooling form an L-shaped positioning angle.

[0018] In some embodiments, the L-shaped positioning angle is a right angle, and the side plane of the prism tooling is perpendicular to the planar crystal.

[0019] Furthermore, the convex lenses are sequentially arranged on the plane wafer so that the convex curved surfaces of the convex lenses contact the plane wafer, and adjacent convex lenses are pre-glued, specifically including:

[0020] Place the convex surface of the first convex lens flat on the flat crystal and stop the first convex lens in the L-shaped positioning angle, wherein the long side surface of the first convex lens is closely attached to the side plane of the second prism fixture, and the short side surface of the first convex prism is closely attached to the side plane of the first prism fixture;

[0021] Placing a plurality of second convex lenses adjacent to each other on the flat wafer in the arrangement direction of the first convex lenses;

[0022] The long sides of two adjacent convex lenses are pre-glued.

[0023] In some embodiments, the contact point between the convex surface of each convex lens and the plane crystal forms a contact center; observing the aperture on the plane crystal in a light source environment, and adjusting the parallelism of the optical axes between the convex lenses to a first preset range according to the position of the aperture, specifically includes:

[0024] The horizontality of the convex lens is adjusted so that the contact center intersects with the center of the aperture, and the misalignment difference between the contact center and the center of the aperture does not exceed a third preset tolerance.

[0025] Furthermore, adjusting the optical axis parallelism between the convex lenses to a second preset range according to the surface reflection image specifically includes:

[0026] The horizontality of the convex lens is adjusted so that the surface reflection images on adjacent convex lenses are aligned into a straight line, the misalignment difference between adjacent surface reflection images does not exceed 1 / 2 of the third preset tolerance, and the second preset range is smaller than the first preset range.

[0027] In some embodiments, the method of sticking includes applying light glue or vaseline on the contact surface;

[0028] The contact surfaces that are butt-jointed by gluing are all coated with curing glue, or the peripheral points of the contact surfaces that are butt-jointed by gluing are coated with curing glue.

[0029] Furthermore, the step of curing the glued parts between the convex lenses to form a glued lens group specifically includes:

[0030] Use a fixed-band ultraviolet surface light source for initial curing. If the aperture center and the surface reflection image do not move, perform final curing under the ultraviolet lamp.

[0031] The beneficial effects of the processing method for the side-bonded lens group provided by the present application are at least that: the present embodiment uses optical principles and cooperates with traditional positioning tooling to improve the parallelism of the optical axes between the lenses in the bonded lens group, especially when the contact surface between the convex lens and the flat crystal is a convex spherical surface, the certainty of the parallelism of the optical axes between the convex lenses can be greatly improved. Compared with traditional methods, this processing method can achieve controllable parallel accuracy of the lens group and improve product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A flow chart of a method for processing a side-cemented lens assembly provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of the structure of an L-shaped positioning fixture and a convex lens provided in an embodiment of the present application placed on a flat wafer;

[0035] Figure 3 A schematic diagram of the structure of a convex lens provided in an embodiment of the present application;

[0036] Figure 4 To illuminate using a linear light emitter Figure 2 Structural diagram of the medium structure;

[0037] Figure 5 It is a schematic diagram of the structure of the surface reflection image formed by the convex lens when the parallelism is low;

[0038] Figure 6 A schematic diagram of a surface reflection image structure formed by convex lenses glued together by conventional processing methods;

[0039] Figure 7 It is a schematic diagram of the surface reflection image structure formed by the convex lenses glued together by the processing method of the present application.

[0040] Among them, the reference numerals in the figure are:

[0041] 1. Convex lens;

[0042] 1a, first convex lens; 1b, second convex lens; 11, first end face; 12, second end face; 13, long side face; 14, short side face;

[0043] 2. Flat crystal;

[0044] 3. L-shaped positioning tooling;

[0045] 31. First prism tooling; 32. Second prism tooling; 33. Bottom surface; 34. End plane; 35. Side plane;

[0046] 4. Linear light source emitter;

[0047] 5. Surface reflection image. DETAILED DESCRIPTION

[0048] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0049] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on the present technical solution. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0050] The following describes a processing method for a side-cemented lens assembly according to an embodiment of the present application in conjunction with the accompanying drawings.

[0051] See also Figure 1 , Figure 1 The process flow chart of the processing method for the side-cemented lens assembly of the present application is shown, comprising the following steps:

[0052] Step S1: prefabricate a plurality of convex lenses 1, wherein the convex lenses 1 have a convex surface.

[0053] Step S2: applying a glossy adhesive to the L-shaped positioning tool 3 on the flat wafer 2 to form an L-shaped positioning angle.

[0054] Step S3: by limiting the L-shaped positioning angle, convex lenses 1 are sequentially arranged on the plane crystal plate 2, so that the convex surface of the convex lens 1 contacts the plane crystal plate 2, and adjacent convex lenses 1 are pre-glued to form a pre-glued lens group.

[0055] Step S4: observing the aperture on the plane wafer 2 in a light source environment, and adjusting the parallelism of the optical axes between the convex lenses 1 to reach a first preset range according to the position of the aperture.

[0056] Step S5: Use the linear light source emitter 4 to illuminate the top of the pre-glued lens group, observe the surface reflection image 5 on the pre-glued lens group, and adjust the optical axis parallelism between each convex lens 1 according to the surface reflection image 5 to reach a second preset range, and the accuracy of the second preset range is higher than that of the first preset range.

[0057] Step S6: solidify the bonding parts between the convex lenses 1 to form a bonded lens group, remove the L-shaped positioning fixture 3 and the flat crystal 2 to obtain a bonded lens group.

[0058] In some embodiments, it should be noted that a cemented lens group refers to a lens group formed by gluing two or more single lenses together using a glue such as ultraviolet glue or heat-sensitive glue. Most cemented lenses are made by gluing together two light-transmitting surfaces with substantially the same radius, one concave and one convex, while the cemented lens group in this embodiment is made by arranging the single lenses in a row and gluing their side surfaces together.

[0059] The plane flat crystal 2 is a right cylindrical or rectangular gauge with two (or one) optical measuring planes. The optical measuring plane is a glass plane with extremely small surface roughness value and flatness error. The flatness error level 1 accuracy is 0.03 to 0.05 microns. It is a common tool used to measure block gauges by interference method, and to check the grinding and flatness of block gauges, gauges, part sealing surfaces, measuring instruments and measuring tool measuring surfaces.

[0060] The aperture formed by the convex lens 1 on the flat crystal 2 is also called Newton's ring. Newton's ring is a typical double beam interference method of amplitude division. Figure 4 When a convex surface with a large radius of curvature contacts the optical measuring surface of a flat crystal 2, a thin air film is formed between the lens and the optical measuring surface. The thickness of the air layer is different at different distances from the contact point, but the thickness is the same at equal distances from the contact point. The trajectory of the equal-thickness film is a concentric circle centered on the contact point. If monochromatic light is projected vertically onto this device, interference occurs between the light waves reflected from the upper and lower edges of the air film due to the optical path difference. This interference is an equal-thickness interference. Therefore, when observing in the projection direction, many concentric light and dark rings centered on the contact point can be seen. The distances between these circles are not equal, and they gradually become narrower as the distance from the center point increases, with a dark spot at the center.

[0061] A linear light source refers to a light source that extends in a certain direction and emits light uniformly. The characteristic of this type of light source is that the light output is linearly distributed in space. Compared with a point light source or a surface light source, it can provide a more uniform and concentrated lighting effect in a specific direction. When the linear light source irradiates the pre-glued lens group from above to below, a surface reflection image 5 will be formed on each convex lens 1 of the pre-glued lens group. When the parallelism between the convex lenses 1 is good, the surface reflection images 5 will be parallel to each other and located on a straight line. However, if the parallelism between the convex lenses 1 is very poor, then the surface reflection images 5 will be misaligned.

[0062] Furthermore, in the process of processing the cemented lens group, firstly, an L-shaped positioning fixture 3 is made, and the L-shaped positioning angle on the L-shaped positioning fixture 3 is used to stop and position the convex lens 1, that is, the shape positioning in the traditional technology. Then, the convex lens 1 is pre-positioned on the flat crystal 2, and then optical adjustment and positioning are performed through steps S4 and S5, so that the parallelism between the convex lenses 1 meets the processing requirements.

[0063] Specifically, when the convex lens 1 is pre-positioned on the flat crystal 2, an aperture can be formed on the flat crystal 2 under the irradiation of indoor light. At the same time, the convex lens 1 and the flat crystal 2 have a contact point. When the center of the aperture formed by the contact point is on the same horizontal line, it means that the horizontality of the convex lens 1 tends to be consistent. When the linear light source is irradiated on the convex lens 1, when the surface reflection images 5 on each convex lens 1 are on the same straight line, it means that the parallelism of the optical axes between the convex lenses 1 is very high.

[0064] Therefore, in order to solve the problem that it is difficult to control the parallelism of the optical axes between the lenses in the glued lens group composed of convex lenses 1, that is, the traditional method of relying only on the gluing method of shape positioning, the convex lens 1 is not easy to be placed steadily, the optical axis is prone to tilt, and the uncertainty is extremely high. The present embodiment uses optical principles and cooperates with traditional positioning tooling to improve the parallelism of the optical axes between the convex lenses 1 in the glued lens group. In particular, when the contact surface between the convex lens 1 and the plane crystal 2 is a convex spherical surface, the certainty of the parallelism of the optical axes between the convex lenses 1 can be greatly improved. Compared with the traditional method, this processing method can achieve controllable parallel accuracy of the lens group and improve product yield.

[0065] In some embodiments, see Figure 2-Figure 3 The convex lens 1 is in the shape of an elongated strip and includes a first light-transmitting surface 11, a second light-transmitting surface 12, two long side surfaces 13 and two short side surfaces 14. The first light-transmitting surface 11 and the second light-transmitting surface 12 are arranged opposite to each other, the two long side surfaces 13 are arranged opposite to each other, and the two short side surfaces 14 are arranged opposite to each other. In step S1, prefabricating a plurality of convex lenses 1 specifically includes: processing the second light-transmitting surface 12 into a convex curved surface, and processing the long side surfaces 13 and the short side surfaces 14 into frosted flat surfaces.

[0066] Further, when the convex lens 1 is prefabricated, the center deviation of each convex lens 1 is not greater than the first preset tolerance value. In this embodiment, the first preset tolerance value is 3' to ensure the structural accuracy of the convex lens 1. The second end face 12 includes a spherical surface and an ellipsoidal surface. Preferably, the second end face 12 is a spherical surface. The verticality deviation of the second end face 12 and the long side face 13 and the short side face 14 is not greater than the second preset tolerance. In this embodiment, the second preset tolerance value is 3'.

[0067] Further, the first end surface 11 includes a spherical surface and an ellipsoidal surface. Preferably, the first end surface 11 is a spherical surface.

[0068] Overall, the convex lens 1 is a rectangular parallelepiped structure with a spherical first end face 11 and a spherical second end face 12. The adjacent long side faces 13 and short side faces 14 are perpendicular to each other, and when pre-positioned by the L-shaped positioning fixture 3, the long side faces 13 and the short side faces 14 can be conveniently and accurately positioned closely to the L-shaped positioning angle.

[0069] In some embodiments, see Figure 2 and Figure 5 The L-shaped positioning fixture 3 includes two prism fixtures, each of which is provided with two bottom surfaces 33 , two end planes 34 and two side planes 35 that are opposite to each other.

[0070] Among them, in step S2, applying the L-shaped positioning tool 3 of the glossy adhesive on the flat wafer 2 and forming an L-shaped positioning angle specifically includes:

[0071] Photo-glue the bottom surface 33 of the first prism fixture 31 onto the flat crystal 2, photo-glue the bottom surface 33 of the second prism fixture 32 onto the flat crystal 2, and attach the end plane 34 of the second prism fixture 32 to the side plane 35 of the first prism fixture 31. The side plane 35 of the first prism fixture 31 and the side plane 35 of the second prism fixture 32 form an L-shaped positioning angle.

[0072] Furthermore, the L-shaped positioning angle is a right angle, and the side plane 35 of the prism tooling is perpendicular to the flat crystal 2 .

[0073] In some embodiments, in step S3, convex lenses 1 are sequentially arranged on the plane wafer 2 so that the convex surfaces of the convex lenses 1 contact the plane wafer 2, and adjacent convex lenses 1 are pre-glued. Figure 2 , including:

[0074] Place the convex surface of the first convex lens 1a flat on the flat crystal 2 and stop the first convex lens 1a within the L-shaped positioning angle, wherein the long side surface 13 of the first convex lens 1a is closely attached to the side plane 35 of the second prism fixture 32, and the short side surface 14 of the first convex lens 1a is closely attached to the side plane 35 of the first prism fixture 31. Place multiple second convex lenses 1b adjacently and flatly on the flat crystal 2 according to the placement direction of the first convex lenses 1a. Pre-glue the long side surfaces 13 of two adjacent convex lenses 1.

[0075] It should be noted that the first convex lens 1a refers to the first convex lens 1 positioned within the L-shaped positioning angle, and the second convex lens 1b refers to the convex lens 1 positioned subsequently.

[0076] The pre-gluing is to apply curing glue on the long side surface 13 but not to cure it. The two adjacent convex lenses 1 can be temporarily positioned under the viscosity of the liquid curing glue to facilitate the subsequent positioning adjustment of the convex lenses 1.

[0077] In some embodiments, the contact point between the convex surface of each convex lens 1 and the flat crystal 2 constitutes a contact center. Figure 6 and Figure 7 , observe the aperture on the plane crystal 2 in a light source environment, and adjust the parallelism of the optical axes between the convex lenses 1 to reach a first preset range according to the position of the aperture, specifically including: adjusting the horizontality of the convex lens 1, that is, making the center of the aperture formed by the contact center located at the center of the single piece, and making the misalignment difference of the aperture center formed by the contact point on the same horizontal line not exceed the third preset tolerance. In this embodiment, the third preset tolerance is 1mm, and the first preset range does not exceed 20′.

[0078] It should be noted that when the convex lens group 1 is glued together only by relying on the shape positioning, due to the instability of the convex surface on the convex lens 1, the accuracy of the parallelism of the optical axis cannot reach the graded level, and can usually only reach a few tens of degrees or even only the degree level. Compared with the previous gluing method that only relies on the shape positioning, this embodiment uses the optical principle of Newton's rings and cooperates with traditional positioning tooling without using an optical measuring instrument. It can control the parallelism of the optical axes between the convex lenses 1 in the glued lens group to reach the graded level, greatly improving the processing accuracy, making the product accuracy controllable, and improving the product yield.

[0079] In some embodiments, in step S5, adjusting the parallelism of the optical axes between the convex lenses 1 to a second preset range according to the surface reflection image 5 specifically includes:

[0080] The horizontality of the convex lenses 1 is adjusted so that the surface reflection images 5 on adjacent convex lenses 1 are aligned into a straight line, the misalignment difference of adjacent surface reflection images 5 does not exceed 0.5 mm, and the second preset range does not exceed 5′.

[0081] This embodiment is based on the Newton ring optical principle, combined with a linear light source, and simultaneously observes the consistency of the reflected image 5 on the convex lens 1, which can further improve the parallelism of the optical axes between the convex lenses 1 in the cemented lens group. Without using an optical measuring instrument, the parallelism of the optical axes between the convex lenses 1 in the cemented lens group can be controlled to reach a graded level, further improving the processing accuracy and product yield.

[0082] In some embodiments, the adhesion method includes gluing or applying vaseline on the contact surface.

[0083] The contact surfaces that are butt-jointed by gluing are all coated with curing glue, or the peripheral points of the contact surfaces that are butt-jointed by gluing are coated with curing glue.

[0084] In some implementations, in step S6, curing the glued parts between the convex lenses 1 to form a glued lens group specifically includes:

[0085] When gluing, UV curing glue is used, and a fixed-band ultraviolet surface light source is used for irradiation. Initial curing is performed for 20 seconds. If the aperture center and the surface reflection image 5 do not move, final curing is performed under the UV lamp, and the final curing time is greater than 12 hours.

[0086] The following describes the processing method for the side-glued lens group in the implementation method with reference to examples. For example, a four-glued product is prepared by gluing the sides of four rectangular biconvex lenses together. It is required that the optical axes of the four single-piece biconvex lenses are parallel to each other <5' after gluing. The biconvex lenses are 27mm long and 6mm wide. The first end face 11 and the second end face 12 are both spherical surfaces with radii of 370mm and 62mm respectively.

[0087] First, the substrate processing must ensure that the center deviation of the single biconvex lens is less than 3', and the verticality between the first end face 11 and the second end face 12 and the long side faces 13 and the short side faces 14 of the four sides is less than 3'. Then, a three-step gluing method is used to ensure that the optical axes of the single biconvex lenses in the final gluing biconvex lens group are parallel to each other by less than 5'.

[0088] The first step is to use the outer shape tooling to lean against the body

[0089] Before processing and gluing the double convex lens, it is necessary to prepare the L-shaped positioning tool 3: optically glue the bottom surface 33 of the first prism tool 31 on the flat crystal 2, optically glue the bottom surface 33 of the second prism tool 32 on the flat crystal 2, and make the end plane 34 of the second prism tool 32 close to the side plane 35 of the first prism tool 31 and see thick color stripes, the side plane 35 of the first prism tool 31 and the side plane 35 of the second prism tool 32 form an L-shaped positioning angle, control the first prism tool 31 and the second prism tool 32 to be perpendicular, and the first prism tool 31 and the second prism tool 32 are perpendicular to the flat crystal 2;

[0090] Step 2: Adjust the aperture formed on the flat crystal 2 according to whether it is at the center of the single-piece double convex lens

[0091] Each single biconvex lens may be unstable and warped. Adjust each single biconvex lens and adjust the center of the aperture to the middle position (contact center) of each single biconvex lens.

[0092] The third step is to use a linear light source to adjust the relative position of a single biconvex lens through the surface reflection image 5 of the two surfaces of the product (biconvex lens group).

[0093] The product is illuminated with a linear light source, with the linear light source and the observation image point both about 300mm away from the product. According to the misalignment distance of the formed strip image (surface reflection image 5), the relative position of the single biconvex lens is adjusted so that the misalignment of the surface reflection images 5 on both sides does not exceed 0.5mm, to ensure that the optical axes of the single biconvex lenses are parallel to each other <5'.

[0094] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for processing a side-cemented lens assembly, characterized in that: The following steps are involved: Prefabricate a plurality of convex lenses, wherein the convex lenses have convex curved surfaces; Apply L-shaped positioning fixture of glazing glue on the flat wafer and form L-shaped positioning angle; By limiting the position of the L-shaped positioning angle, convex lenses are sequentially arranged on the plane flat crystal, so that the convex curved surface of the convex lens contacts the plane flat crystal, and adjacent convex lenses are pre-glued to form a pre-glued lens group; Observe the aperture on the plane crystal in a light source environment, and adjust the parallelism of the optical axes between the lenses to a first preset range according to the position of the aperture; Using a linear light source emitter to illuminate the top of the pre-glued lens group, observing the surface reflection image on the pre-glued lens group, and adjusting the parallelism of the optical axes between the lenses to a second preset range according to the surface reflection image, wherein the accuracy of the second preset range is higher than that of the first preset range; The bonding parts between the convex lenses are cured to form a bonded lens group, and the L-shaped positioning fixture and the flat crystal are removed to obtain a bonded lens group.

2. The processing method for a side-cemented lens assembly according to claim 1, characterized in that: The convex lens is in the shape of an elongated strip and comprises a first end face, a second end face, two long side faces and two short side faces; the prefabricated plurality of convex lenses specifically comprises: The second end surface is processed into the convex curved surface, and the long side surface and the short side surface are processed into frosted flat surfaces.

3. The processing method for a side-cemented lens assembly according to claim 2, characterized in that: The center deviation of each lens is no greater than a first preset tolerance value, the second end surface includes a spherical surface and an ellipsoidal surface, and the perpendicularity deviation between the second end surface and the long side surface and the short side surface is no greater than a second preset tolerance.

4. The processing method for a side-cemented lens assembly according to claim 1, characterized in that: The L-shaped positioning tool comprises two prism tools, each of which is provided with two bottom surfaces, two end planes and two side planes in opposite positions; the L-shaped positioning tool for applying the glossy adhesive on the flat wafer and forming an L-shaped positioning angle specifically comprises: Glue the bottom surface of the first prism tooling onto the flat crystal, glue the bottom surface of the second prism tooling onto the flat crystal, and attach the end plane of the second prism tooling to the side plane of the first prism tooling. The side plane of the first prism tooling and the side plane of the second prism tooling form an L-shaped positioning angle.

5. The processing method for a side-cemented lens assembly according to claim 4, characterized in that: The L-shaped positioning angle is a right angle, and the side plane of the prism tooling is perpendicular to the flat crystal.

6. The processing method for a side-cemented lens assembly according to claim 4, characterized in that: The step of sequentially arranging the convex lenses on the plane crystal plate so that the convex curved surfaces of the convex lenses contact the plane crystal plate and pre-gluing adjacent convex lenses specifically includes: Place the convex surface of the first convex lens flat on the flat crystal and stop the first convex lens in the L-shaped positioning angle, wherein the long side surface of the first convex lens is closely attached to the side plane of the second prism fixture, and the short side surface of the first convex prism is closely attached to the side plane of the first prism fixture; Placing a plurality of second convex lenses adjacent to each other on the flat wafer in the arrangement direction of the first convex lenses; The long sides of two adjacent convex lenses are pre-glued.

7. The processing method for a side-cemented lens assembly according to claim 1, characterized in that: The contact point between the convex surface of each convex lens and the plane flat crystal constitutes a contact center; the aperture on the plane flat crystal is observed in a light source environment, and the parallelism of the optical axes between the lenses is adjusted to a first preset range according to the position of the aperture, specifically including: The horizontality of the convex lens is adjusted so that the contact center intersects with the center of the aperture, and the misalignment difference between the contact center and the center of the aperture does not exceed a third preset tolerance.

8. The processing method for a side-cemented lens assembly according to claim 7, characterized in that: The step of adjusting the optical axis parallelism between the convex lenses according to the surface reflection image to reach a second preset range specifically includes: The horizontality of the convex lens is adjusted so that the surface reflection images on adjacent convex lenses are aligned into a straight line, the misalignment difference between adjacent surface reflection images does not exceed 1 / 2 of the third preset tolerance, and the second preset range is smaller than the first preset range.

9. The processing method for a side-cemented lens assembly according to claim 6, characterized in that: Through the method of adhesion including gloss glue or applying vaseline on the contact surface; The contact surfaces that are butt-jointed by gluing are all coated with curing glue, or the peripheral points of the contact surfaces that are butt-jointed by gluing are coated with curing glue.

10. The processing method for a side-cemented lens assembly according to claim 6, characterized in that: The step of curing the glued parts between the convex lenses to form a glued lens group specifically includes: Use a fixed-band ultraviolet surface light source for initial curing. If the aperture center and the surface reflection image do not move, perform final curing under the ultraviolet lamp.

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