Stacked spaceflight optical lens

Abstract

The invention relates to a spaceflight optical lens, in particular to a stacked spaceflight optical lens, and aims to overcome the defects that in the prior art, the number of parts needing to be machined is large, and secondary machining is needed during centering combination, so that the assembling efficiency is reduced. The stacked spaceflight optical lens comprises M stacked lens cones, M optical lenses, M-1 adjusting lens cones, M * k first screws and M * k second screws, M is larger than or equal to 2, k is larger than or equal to 2 and smaller than or equal to 4, the M stacked lens cones are consistent in specification and size, and the M stacked lens cones and the M-1 adjusting lens cones are sequentially and alternately arranged along the central axis. The two ends of the adjusting lens cone are detachably connected with the adjacent stacked lens cones respectively.

Description

[0001] This application is a divisional application of the invention patent with the application number 2024118477894, the application date of December 16, 2024, and the invention name of "Stacked Aerospace Optical Lens and Its Assembly Tools and Assembly Methods". Technical Field

[0002] The present invention relates to aerospace optical lenses, and specifically to a stacked aerospace optical lens. Background Art

[0003] In the prior art, aerospace optical lenses mostly adopt a structural design method of a lens frame, a lens, a retaining ring, a spacer ring, and a lens barrel, and a centering combination processing method is adopted during assembly. This existing aerospace optical lens and the centering combination processing method require a relatively large number of parts to be processed, and secondary processing is also required during centering combination, which greatly reduces the assembly efficiency. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies in the prior art that a large number of parts need to be processed and secondary processing is also required during centering combination, thereby reducing the assembly efficiency, and to provide a stacked aerospace optical lens.

[0005] Invention Concept:

[0006] The aerospace optical lens adopts a modular design concept, and a design concept of combining a stacked lens barrel and an adjustment lens barrel is adopted to reduce the number of parts to be processed and avoid secondary processing at the same time, so as to improve the manufacturing and assembly efficiency of the aerospace optical lens.

[0007] To achieve the above invention purpose and complete the above invention concept, the technical solution provided by the present invention is as follows:

[0008] A stacked aerospace optical lens, characterized in that it includes M stacked lens barrels, M optical lenses, M - 1 adjustment lens barrels, M×k first screws, and M×k second screws, where M≥2, 2≤k≤4; the specifications and sizes of the M stacked lens barrels are the same, the M stacked lens barrels and the M - 1 adjustment lens barrels are alternately arranged along the central axis in sequence, and both ends of the adjustment lens barrel are detachably connected to the adjacent stacked lens barrels; 2k threaded holes are evenly distributed in the circumferential direction on the side wall of the stacked lens barrel, and the positions of the threaded holes on the M stacked lens barrels are the same in the circumferential direction; the inner diameter R0 of the stacked lens barrel satisfies the following relationship:

[0009] 1≤R0 - R≤2,

[0010] where R is the maximum diameter of the M optical lenses, with the unit of mm;

[0011] M of the optical lenses are respectively arranged in M stacked lens barrels, and circular grooves are arranged on the side walls of each optical lens corresponding to the threaded holes; the first screw rod and the second screw rod have the same length and are alternately arranged in 2k threaded holes. One ends of the first screw rod and the second screw rod respectively abut against and are bonded to the corresponding circular grooves, and the other ends thereof are threadedly connected to the threaded holes. The end faces of the other ends of the first screw rod and the second screw rod are close to the outer side wall of the stacked lens barrel or flush with the outer side wall of the stacked lens barrel; a plurality of through grooves are axially formed on the side wall of the second screw rod.

[0012] Further, the first screw rod includes a first threaded section and a first main body section;

[0013] The axial length of the first threaded section is the same as the wall thickness of the stacked lens barrel, and it is arranged in the threaded hole of the stacked lens barrel and threadedly connected to the stacked lens barrel. The outer diameter of the first threaded section is larger than the outer diameter of the first main body section; one end of the first main body section away from the first threaded section abuts against and is bonded to the circular groove on the side wall of the optical lens, and the outer diameter of the first main body section satisfies the following relationship:

[0014] d2 = d1 - 1.5,

[0015] wherein, d1 is the diameter of the circular groove, d2 is the outer diameter of the first main body section, and the unit is mm.

[0016] Further, the second screw rod includes a second threaded section and a second main body section. The second threaded section has the same structure and size as the first threaded section. The second threaded section is arranged in the threaded hole of the stacked lens barrel and threadedly connected to the stacked lens barrel. The outer diameter of the second threaded section is larger than the outer diameter of the second main body section; the outer diameter of the second main body section satisfies the following relationship:

[0017] d3 = d1 - 2,

[0018] wherein, d3 is the outer diameter of the second main body section, and the unit is mm;

[0019] The plurality of through grooves are oppositely formed on both sides of the central axis of the second main body section, and the arrangement directions of the adjacent through grooves along the central axis direction are perpendicular to each other.

[0020] Further, the thickness w1 of the second main body section between the bottoms of the oppositely formed through grooves satisfies the following conditions:

[0021] 0.1×d3 ≤ w1 ≤ 0.5×d3,

[0022] One end face of the first threaded section is provided with one of a cross slot or a flat slot, and the other end face of the second threaded section away from the second main body section is provided with the other of a cross slot or a flat slot.

[0023] Further, a plurality of elongated grooves are uniformly arranged along the circumferential direction on the outer side wall of one end of the first main body section. The length of the elongated groove along the axial direction is the same as the height of the circular groove. One end of the first main body section is coated with epoxy glue for bonding with the optical lens.

[0024] The length of the second screw is the same as that of the first screw. The end of the second main body section far from the second threaded section and the side wall of the second threaded section are both coated with silicone rubber.

[0025] Further, one end of the stacked lens barrel is provided with an internal thread along the central axis direction, and the other end is provided with an external thread. The specifications of the internal thread and the external thread are matched.

[0026] The outer diameter of the adjustment lens barrel is the same as that of the stacked lens barrel. Internal threads and external threads are respectively arranged at both ends along the axis. The internal thread and external thread of the adjustment lens barrel are matched with the external thread and internal thread of the stacked lens barrel in terms of specifications. The starting and ending points of the internal thread and external thread of the stacked lens barrel, and the positions on the circumference of the starting and ending points of the internal thread and external thread of the adjustment lens barrel all correspond exactly. The two ends of the adjustment lens barrel are respectively connected to the adjacent stacked lens barrels by threads.

[0027] Alternatively, clamping structures are respectively arranged at one end and the other end of the stacked lens barrel along the central axis direction. The outer diameter of the adjustment lens barrel is the same as that of the stacked lens barrel. Clamping structures corresponding to each other are respectively arranged at one end and the other end of the adjustment lens barrel. The two ends of the adjustment lens barrel are respectively connected to the adjacent stacked lens barrels by clamping.

[0028] Further, it further includes a protection diaphragm arranged at the front end of the first stacked lens barrel close to the light incident direction among the M stacked lens barrels, and / or a transition mounting flange arranged at the rear end of the Mth stacked lens barrel close to the light exit direction among the M stacked lens barrels.

[0029] The protection diaphragm includes a diaphragm and an annular connecting member arranged circumferentially around it.

[0030] The diameter R1 of the light incident port of the diaphragm satisfies the following relationship:

[0031] 1 ≤ R1 - R2 ≤ 2,

[0032] wherein, R2 is the diameter of the first optical lens arranged along the light incident direction, and the unit is mm.

[0033] One end of the annular connecting member is provided with a threaded structure for connecting with the external thread or internal thread of the stacked lens barrel; alternatively, one end of the annular connecting member is provided with a clamping structure, and the annular connecting member is clamped with the stacked lens barrel.

[0034] One end of the adapter mounting flange is threadedly connected or snap-fitted to the stacked lens barrel, and the other end is used to connect to other external structures.

[0035] Advantages of the present invention:

[0036] 1. The present invention adopts the concepts of modular and standardized design, manufacturing, and assembly. Compared with traditional aerospace optical lenses, it improves the manufacturing and assembly efficiency, which is beneficial to the mass production and rapid assembly of aerospace optical lenses.

[0037] 2. In view of the special usage scenarios and requirements of aerospace optical lenses, the present invention provides a first screw and a second screw, which respectively play a role in main fixing and auxiliary fixing of the optical lens. It can not only reduce the influence of adverse mechanical environments such as rocket vibration and shock on the aerospace optical lens and the optical lens therein during rocket launch, but also reduce the influence of temperature changes in the space environment on the optical lens after entering space, so as to maintain good optical performance.

[0038] 3. The present invention can adopt special assembly methods and assembly tools, and can realize reliable and convenient high-precision and rapid assembly of optical lenses. Description of the Drawings

[0039] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0040] Figure 2 is a schematic structural diagram of other embodiments of the present invention;

[0041] Figure 3 is a schematic structural diagram of the stacked lens barrel in an embodiment of the present invention;

[0042] Figure 4 is a schematic structural diagram of the first optical lens in an embodiment of the present invention;

[0043] Figure 5 is a schematic structural diagram of the adjustment lens barrel in an embodiment of the present invention;

[0044] Figure 6 is a schematic structural diagram of the first screw in an embodiment of the present invention;

[0045] Figure 7 is a schematic structural diagram of the second screw in an embodiment of the present invention;

[0046] Figure 8 is Figure 1 the A-direction view of;

[0047] Figure 9 is Figure 8 the B-B cross-sectional view of;

[0048] Figure 10It is a schematic structural diagram of the protective diaphragm in the embodiment of the present invention;

[0049] Figure 11 It is a schematic structural diagram of the adapter mounting flange in the embodiment of the present invention;

[0050] Figure 12 It is a schematic structural diagram of the assembly tool used in the embodiment of the present invention (the connecting bracket is not shown);

[0051] Figure 13 It is a schematic structural diagram of the horizontal guiding shaft in the assembly tool used in the embodiment of the present invention;

[0052] Figure 14 It is a schematic structural diagram of the adjusting mechanism in the assembly tool used in the embodiment of the present invention;

[0053] Figure 15 It is a schematic structural diagram of the assembly of the first optical lens in step 2 of the assembly method used in the embodiment of the present invention;

[0054] Figure 16 It is a schematic structural diagram of the assembly in step 3 of the assembly method used in the embodiment of the present invention;

[0055] Figure 17 It is a schematic structural diagram of the assembly in step 4 of the assembly method used in the embodiment of the present invention;

[0056] Figure 18 It is a schematic structural diagram of the assembly in step 5 of the assembly method used in the embodiment of the present invention (the connecting bracket is not shown).

[0057] Explanation of reference numerals:

[0058] 101 - Stacked lens barrel, 1011 - Threaded hole, 102 - Adjusting lens barrel, 103 - First screw, 1031 - First threaded section, 1032 - First main body section, 1033 - Long slot, 104 - Second screw, 1041 - Second threaded section, 1042 - Second main body section, 1043 - Through slot, 105 - Adapter mounting flange, 106 - Protective diaphragm, 107 - First optical lens, 108 - Second optical lens, 109 - Third optical lens, 110 - Circular groove;

[0059] 201 - Visible light emitting device, 202 - Detection device, 203 - Ring bracket, 204 - Horizontal guiding shaft, 2041 - Limiting edge, 205 - Adjusting mechanism, 2051 - Positioning ring, 2052 - Telescopic rod, 2053 - First adjusting rod, 2054 - Second adjusting rod, 2055 - First locking knob, 2056 - Second locking knob, 2057 - Third locking knob, 2058 - Ball hinge. Detailed implementation manners

[0060] The overall structure of a stacked aerospace optical lens according to the present invention is as follows Figure 1 shown, including a protective diaphragm 106, M stacked barrels 101, M optical lenses, M - 1 adjustment barrels 102, M×k first screws 103, M×k second screws 104, and an adapter mounting flange 105, where M≥2 and 2≤k≤4; the M stacked barrels 101 and the M - 1 adjustment barrels 102 are alternately arranged in sequence along the central axis, and both ends of the adjustment barrel 102 are detachably connected to the adjacent stacked barrels 101. In this embodiment, a threaded connection is adopted. The M optical lenses are respectively installed in the M stacked barrels 101. In this embodiment, M = 3.

[0061] The specifications and dimensions of the M stacked barrels 101 are the same. The inner diameter R0 of the stacked barrel 101 is 1 - 2 mm larger than the maximum diameter R of the M optical lenses. One end of the stacked barrel 101 along the central axis direction is provided with an internal thread, and the other end is provided with an external thread. The internal thread and the external thread are adapted to each other, and all important parameters are the same. The important parameters include tooth profile, nominal diameter, number of threads, pitch, helix direction, engagement length, and starting and ending positions in the circumferential direction, which is convenient for improving the installation efficiency. When manufacturing and assembling a large number of aerospace optical lenses, several stacked barrels 101 can be manufactured according to the sizes of different stacked aerospace optical lenses for use in rapid assembly.

[0062] As Figure 3 shown, the side wall of the stacked barrel 101 is evenly distributed with 2k threaded holes 1011 in the circumferential direction. 2k circular grooves 110 are respectively provided on the side walls of each optical lens corresponding to the 2k threaded holes 1011. In this embodiment, k = 3, and a total of 6 threaded holes 1011 and 6 circular grooves 110 are provided. As Figure 4 shown, the value range of the diameter d1 of the circular groove 110 is 3 - 3.5 mm, and the value range of the depth h1 of the circular groove 110 is 2 - 3 mm.

[0063] In the present invention, the M - 1 adjustment barrels 102 are set as modular standard parts, and the sizes of their inner and outer diameters are exactly the same as those of the selected stacked barrels 101. As Figure 5 shown, one end of the adjustment barrel 102 along the axis direction is provided with an internal thread, and the other end is provided with an external thread. Its internal thread and external thread are adapted to each other, and the important parameters are the same as those of the stacked barrel 101. The main function of the adjustment barrel 102 is to make the axial spacing of the optical lenses meet the design requirements. Therefore, different axial lengths L1 of the adjustment barrel 102 are selected according to the actual optical design requirements. Several adjustment barrels 102 can be pre - fabricated in advance, and their differences mainly lie in the axial length L1. In this embodiment, the axial lengths L1 of different adjustment barrels 102 increase in increments of 0.25 mm.

[0064] The starting and ending points of the internal and external threads of the stacked barrel 101 and the positions of the starting and ending points of the internal and external threads of the adjusting barrel 102 on the circumference correspond exactly. The circumferential positions of the threaded holes 1011 on the stacked barrel 101 relative to the starting and ending points of the internal and external threads are also the same, ensuring that the circumferential positions of the threaded holes 1011 on the M stacked barrels 101 correspond respectively each time they are connected, as Figure 8 shown.

[0065] In other embodiments of the present invention, engaging structures are respectively provided at one end and the other end of the stacked barrel 101. The outer diameter of the adjusting barrel 102 is the same as that of the stacked barrel 101. Engaging structures corresponding to each other are respectively provided at one end and the other end of the adjusting barrel 102. The two ends of the adjusting barrel 102 are respectively connected to adjacent stacked barrels 101 in an engaging manner.

[0066] The first screw 103 and the second screw 104 have the same length. The number of the first screw 103 and the second screw 104 corresponding to each stacked barrel 101 is 3 respectively. The first screw 103 and the second screw 104 are alternately arranged in the 6 threaded holes 1011, with one end respectively abutted against the circular grooves 110 on the side wall of the optical lens and the other end threadedly connected to the threaded holes 1011, for adjusting and positioning the optical lens. Among them, the first screw 103 is connected to the optical lens through epoxy glue to achieve the main fixing function, and the second screw 104 is auxiliary-fixed to the optical lens through silicone rubber.

[0067] The first screw 103 is set as a modular part, as Figure 6 shown, including a first threaded section 1031 and a first main body section 1032. The outer diameter of the first threaded section 1031 is greater than the outer diameter of the first main body section 1032. The outer diameter of the first main body section 1032 satisfies the following relationship: d2 = d1 - 1.5, where d2 is the outer diameter of the first main body section 1032, and the unit is mm. One end of the first main body section 1032 away from the first threaded section 1031 abuts against the circular groove 110 on the side wall of the optical lens. The axial length of the first threaded section 1031 is the same as the wall thickness of the stacked barrel 101, and the outer side wall is provided with threads matching the threaded holes 1011 of the stacked barrel 101. When in use, the appropriate length of the first screw 103 should be selected according to the actual situation, so that the end face of the first threaded section 1031 away from the first main body section 1032 is exactly near the outer side wall of the stacked barrel 101, preferably flush with it. Preferably, a plurality of elongated grooves 1033 are uniformly arranged along the circumferential direction on the outer side wall of one end of the first main body section 1032. The length of the elongated grooves 1033 along the axial direction is denoted as h2, and h2 = h1. Epoxy glue is applied in the elongated grooves 1033 for bonding with the optical lens. The structure of the elongated grooves 1033 can increase the contact area of the epoxy glue, thereby improving the bonding performance.

[0068] The second screw 104 is provided as a modular part, such as Figure 7 shown, including a second threaded section 1041 and a second main body section 1042. The second threaded section 1041 has the same structure and size as the first threaded section 1031. The outer diameter of the second threaded section 1041 is greater than the outer diameter of the second main body section 1042 and matches the threaded hole 1011 of the stacked lens barrel 101. The outer diameter of the second main body section 1042 satisfies the following relationship: d3 = d1 - 2, where d3 is the outer diameter of the second main body section 1042 in mm. In use, the appropriate length of the second screw 104 should be selected according to the actual situation. For the same optical lens, when the length L2 of the first screw 103 is determined, the length L3 of the second screw 104 should be the same. A plurality of through slots 1043 are oppositely opened on both sides of the second main body section 1042 along the central axis direction, and the directions of the adjacent through slots 1043 along the central axis direction are perpendicular to each other. By arranging a plurality of through slots 1043 staggered on the side wall of the second main body section 1042 through this structure, the stiffness of the second screw 104 can be weakened, so that the second screw 104 has a certain flexibility. The thickness of the second main body section 1042 between the bottoms of the oppositely opened through slots 1043 is denoted as w1, and satisfies the following condition: 0.1×d3 ≤ w1 ≤ 0.5×d3.

[0069] In the present invention, the first screw 103 mainly plays a role in clamping and fixing the optical lens. Therefore, the second screw 104 does not need to have too strong stiffness, so as to avoid generating excessive assembly stress on the optical lens due to too many strong constraints, thereby affecting the imaging quality of the lens. In addition, when the lens is used in a space environment, the temperature difference is large. Staggeredly arranging a plurality of through slots 1043 can reduce the excessive heat deformation of the second screw 104 from being transmitted to the optical lens and affecting the imaging quality of the aerospace optical lens. In the present invention, during the process of the aerospace optical lens being carried on a rocket and launched into space, the rocket will generate large vibrations and impacts on it. Therefore, the first screw 103 and the second screw 104 with different structures must be set at the same time. By clamping and fixing the optical lens through the combination of the two, the influence of vibrations and impacts on the aerospace optical lens and the optical lens therein can be well reduced. During mass production and assembly, a number of first screws 103 and second screws 104 can be pre-fabricated. The number of first screws 103 and second screws 104 respectively have a plurality of different lengths. The different lengths L2 of the first screw 103 increase in increments of 0.25 mm, and the length L3 of the second screw 104 also increases in increments of 0.25 mm.

[0070] For the convenience of adjustment and distinction and to reduce the possibility of errors in assembly, in this embodiment, a cross slot and a flat slot are respectively provided on the end surface of the first threaded section 1031 away from the first main body section 1032 and the end surface of the second threaded section 1041 away from the second main body section 1042; in other embodiments, the cross slot and the flat slot can also be exchanged.

[0071] As shown Figure 9 in the figure, the optical lenses arranged along the light incident direction are defined as the first optical lens 107, the second optical lens 108, and the third optical lens 109 in sequence. The protection diaphragm 106 is arranged on one side of the first optical lens 107 close to the light incident direction, and includes the diaphragm and the annular connecting piece arranged circumferentially thereon. As shown Figure 10 in the figure, the diameter R1 of the light incident port of the diaphragm is 1 - 2 mm larger than the diameter R2 of the first optical lens arranged along the light incident direction. In this embodiment, R2 is the diameter of the first optical lens 107. The protection diaphragm 106 can play two roles. One is to prevent external stray light from entering the lens interior and improve the optical performance of the lens. The other is to prevent large particle dust or debris from entering the lens. One end of the outer side wall of the annular connecting piece is designed with a threaded structure for threaded connection with the stacked lens barrel 101. This threaded structure is adapted to the internal thread on the stacked lens barrel 101, and all important parameters are the same. In other embodiments of the present invention, the threaded structure can also be arranged at one end of the inner side wall of the annular connecting piece and be adapted to the external thread of the stacked lens barrel 101. The protection diaphragm 106 is also a modular part. When mass-producing and assembling, several protection diaphragms 106 can be prepared in advance. The several protection diaphragms 106 have multiple different light incident port diameters, and the different light incident port diameters increase by 1 mm

[0072] The adapter mounting flange 105 is arranged at a position of the third optical lens 109 close to the light exit direction for connection with other external structures. As shown Figure 11 in the figure, the inner side wall of the adapter mounting flange 105 is designed with a mounting thread, and the mounting thread is adapted to the external thread on the stacked lens barrel 101, and all important parameters are the same. In other embodiments of the present invention, the adapter mounting flange 105 can also be not provided. As shown Figure 2 in the figure, it is directly connected with other external structures through the external thread on the stacked lens barrel 101, and the axial setting directions of the stacked lens barrel 101 and the adjustment lens barrel 102 can be adjusted as needed

[0073] Therefore, through modular and standardized design, a stacked aerospace optical lens of the present invention can quickly select corresponding parts for quick assembly. Once the optical design is determined, the size of the optical lens with the largest diameter can be obtained, thereby selecting the corresponding stacked lens barrel 101, and further selecting the matching first screw 103 and second screw 104 to improve the assembly efficiency

[0074] Figure 12Schematic diagram of an assembly tool for the above-mentioned stacked aerospace optical lens, mainly including an assembly mounting frame and a visible light emitting device 201 and a detection device 202 arranged on both sides of it along the central axis. The visible light emitting device 201 and the detection device 202 are respectively fixed on the optical platform through connecting brackets. The visible light emitting device 201 emits visible light, which passes through the assembled stacked aerospace optical lens and is received by the detection device 202, so as to judge whether the postures and spatial positions of the optical lenses are accurate. The assembly mounting frame mainly includes two coaxial annular brackets 203, k horizontal guiding shafts 204 evenly distributed along the circumferential direction of the annular bracket 203, and a plurality of adjusting mechanisms 205 arranged on each horizontal guiding shaft 204. In this embodiment, k = 3, and one of the horizontal guiding shafts 204 is located at the top of the annular bracket 203. In other embodiments, k = 2, and the two horizontal guiding shafts 204 are respectively located on the left and right sides of the annular bracket 203, or k = 4, and the four horizontal guiding shafts 204 are respectively located at the upper left, upper right, lower left, and lower right of the annular bracket 203 and are symmetrically arranged to ensure that during assembly, there is always a first screw 103 facing downwards. During assembly, the positions of the 3 horizontal guiding shafts 204 respectively correspond to the circumferential positions of the second screw 104. The annular bracket 203, the output end of the visible light emitting device 201, and the input end of the detection device 202 are all coaxially arranged on the optical platform. Both ends of the horizontal guiding shaft 204 are connected to the two annular brackets 203 and are parallel to the central axis of the annular bracket 203. There is a limiting edge 2041 on the side wall of the horizontal guiding shaft 204 along its axial direction, as Figure 13 shown.

[0075] The adjusting mechanism 205 is as Figure 14 shown, including a positioning ring 2051, a telescopic rod 2052, a first locking knob 2055, and a second locking knob 2056. The positioning ring 2051 is sleeved on the horizontal guiding shaft 204, and there is a sliding fit between the inner side wall and the outer side wall of the horizontal guiding shaft 204, so that the positioning ring 2051 can move axially along the horizontal guiding shaft 204. A groove matching the limiting edge 2041 is provided on the inner side wall of the positioning ring 2051 for limiting the initial angle of the telescopic rod 2052. When in use, the telescopic rod 2052 needs to be arranged through the corresponding threaded hole 1011 of the second screw 104. The initial angle of the telescopic rod 2052 faces the central axis through the limiting edge 2041, and this angle does not need to be adjusted during the assembly process, improving the assembly efficiency. In this embodiment, the central angle corresponding to adjacent horizontal guiding shafts 204 is 120°, and the limiting edges 2041 of the 3 horizontal guiding shafts 204 are also evenly distributed along the circumference of the annular bracket 203 at intervals of 120° in space.

[0076] The first locking knob 2055 passes through the positioning ring 2051 and its inner end abuts against the horizontal guiding shaft 204. Rotating the first locking knob 2055 realizes the locking and loosening between the positioning ring 2051 and the horizontal guiding shaft 204. The telescopic rod 2052 includes a first adjusting rod 2053 and a second adjusting rod 2054 arranged axially in sequence. One end of the first adjusting rod 2053 is connected to the positioning ring 2051 through a ball hinge 2058, enabling the first adjusting rod 2053 to rotate relative to the positioning ring 2051. The second locking knob 2056 is arranged on the ball hinge 2058 and is used to lock or loosen the ball hinge 2058. The second adjusting rod 2054 is telescopically connected to the first adjusting rod 2053 and can telescopically extend along the axial direction of the first adjusting rod 2053. The adjusting mechanism 205 further includes a third locking knob 2057, which is arranged at the connection between the second adjusting rod 2054 and the first adjusting rod 2053 and is used to lock or loosen the second adjusting rod 2054. In this embodiment, the first adjusting rod 2053 is arranged as a hollow structure, and the second adjusting rod 2054 is nested in the first adjusting rod 2053. The diameter d4 of the second adjusting rod 2054 satisfies the following relationship: d4 = d1 - 1, with the unit of mm. The adjusting mechanism 205 can be provided in multiple different specifications, and when assembling and installing, the required adjusting mechanism 205 is selected according to the actual situation.

[0077] Based on the above assembly tool, the assembly method of the stacked aerospace optical lens specifically includes the following steps:

[0078] Step 1, according to the diameter value of the optical lens with the largest diameter, select a stacked barrel 101 with a suitable size; it should be noted that in the same stacked aerospace optical lens, all the stacked barrels 101 are of the same specification; in this embodiment, three stacked barrels 101 are selected.

[0079] Step 2, assemble the corresponding optical lenses in each stacked barrel 101;

[0080] Taking the first optical lens 107 as an example, place the first optical lens 107 at the middle position of the stacked barrel 101. Since the diameter of the first optical lens 107 and the specification of the stacked barrel 101 are known, 3 first screws 103 that are adapted to it can be selected through calculation. The 3 first screws 103 are arranged at intervals in the 6 threaded holes 1011 of the stacked barrel 101. Use a cross screwdriver to gradually apply force to tighten the 3 first screws 103 respectively. When the end faces of the first threaded sections 1031 of the 3 first screws 103 are exactly flush with the outer side wall of the stacked barrel 101, the first optical lens 107 is at the middle position of the stacked barrel, as Figure 15 shown.

[0081] Similarly, the second optical lens 108 and the third optical lens 109 are respectively installed into the corresponding stacked lens barrels 101. In this process, the first screw 103 that matches the diameter of the optical lens needs to be selected.

[0082] Step 3: According to the spacing of the optical lenses in the optical axis direction and considering the axial dimension of the stacked lens barrel 101, select an appropriate adjustment lens barrel 102. Connect the stacked lens barrel 101 and the adjustment lens barrel 102 by threading. The completed state is as Figure 16 shown.

[0083] Step 4: Select a protection diaphragm 106 with a size that matches the diameter of the first optical lens 107, install it in place, and then assemble the adapter mounting flange 105 to obtain a lens assembly, as Figure 17 shown. In other embodiments of the present invention, the protection diaphragm 106 and / or the adapter mounting flange 105 may not be provided. Then, the lens assembly is directly obtained in Step 3, and Step 5 is entered.

[0084] Step 5: Adjust the adjustment mechanism 205 so that the second adjustment rod 2054 passes through the remaining threaded holes 1011 on the side wall of the stacked lens barrel 101, and the end abuts against the circular groove 110 opened on the side wall of the optical lens, as Figure 18 shown, so that the lens assembly is placed on the assembly mounting frame, and one of the first screws 103 corresponding to each stacked lens barrel 101 faces downward. The diameter of the second adjustment rod 2054 is 1 mm smaller than the diameter of the circular groove 110. Therefore, there is a certain gap between the outer side wall of the second adjustment rod 2054 and the side wall of the circular groove 110. This gap provides space for subsequent fine adjustment of the postures and spatial positions of the optical lenses.

[0085] Step 6: Use a cross screwdriver to remove all the first screws 103.

[0086] Step 7: Control the visible light emitting device 201 to emit visible light, which passes through the three optical lenses and is received by the detection device 202. Determine whether the positions of the optical lenses are appropriate according to the received visible light. If appropriate, proceed to the next step. If not appropriate, perform fine adjustment until the received visible light meets the requirements.

[0087] There are the following three operations for fine adjustment:

[0088] (1) Adjust the first locking knob 2055 to move the entire adjustment mechanism 205 appropriately along the horizontal guide shaft 204 to adjust the spacing between the optical lenses.

[0089] (2) Adjust the second locking knob 2056 to enable the telescopic rod 2052 to rotate appropriately to adjust the postures such as the pitch and yaw of the optical lenses.

[0090] (3) Adjust the third locking knob 2057, appropriately extend or shorten the second adjusting rod 2054, and adjust the central axis of the optical lens so that it is located at the middle position of the stacked lens barrel 101. Meanwhile, the optical lens can be temporarily and stably clamped.

[0091] The above three operations can be used in combination, or only one or two of them can be used, and the operation sequence of the three is not deliberately emphasized. After fine adjustment, the stacked aerospace optical lens achieves better optical performance, and the end of the second adjusting rod 2054 abuts against the bottom surface of the circular groove 110 on the side wall of the optical lens, playing a role of temporarily clamping the optical lens.

[0092] Step 8: Apply epoxy glue to the part of one end of the first screw 103 corresponding to the inside of the circular groove 110. The coating area on the side wall is within the range where the axial length of one end of the first main body section 1032 is less than h2. First, install one first screw 103 of each optical lens into the lower threaded hole 1011 so that the end surface of the other end is flush with the outer side wall of the stacked lens barrel 101, and then install and tighten the remaining first screws 103. During this process, the lens assembly is always placed on the assembly mounting rack. After the glue cures, control the third locking knob 2057, shorten the second adjusting rod 2054, and remove the lens assembly from the assembly mounting rack.

[0093] Step 9: According to the specifications of the first screws 103 selected for each optical lens, select the adapted second screws 104. Apply silicone rubber to the end of the second main body section 1042 of the second screw 104 away from the second threaded section 1041 and the outer side wall of the second threaded section 1041. The coating area at the end of one end of the second main body section 1042 is the area where it is located inside the circular groove 110. In this embodiment, the model of the silicone rubber is preferably GD414, and the silicone rubber is used to assist in preventing loosening and prevent the second screw 104 from rotating at the threaded connection during actual use.

[0094] Step 10: Immediately install the second screw 104 coated with silicone rubber in the corresponding position and tighten it with a flat-blade screwdriver. When tightening, it is necessary to gradually apply force to tighten. Let it stand still until the silicone rubber cures to complete the assembly, and obtain the stacked aerospace optical lens as Figure 1 shown.

Claims

1. A stacked aerospace optical lens, characterized in that: It includes M stacked lens barrels (101), M optical lenses, M - 1 adjusting lens barrels (102), M×k first screws (103) and M×k second screws (104), where M≥2 and 2≤k≤4; The M stacked lens barrels (101) have the same specifications and dimensions. The M stacked lens barrels (101) and the M - 1 adjusting lens barrels (102) are arranged alternately along the central axis. The two ends of the adjusting lens barrel (102) are detachably connected to the adjacent stacked lens barrels (101); The side wall of the stacked lens barrel (101) is circumferentially provided with 2k threaded holes (1011) evenly. The threaded holes (1011) on the M stacked lens barrels (101) correspond to the same positions in the circumferential direction. The inner diameter R0 of the stacked lens barrel (101) satisfies the following relationship: 1≤R0 - R≤2, where R is the maximum diameter of the M optical lenses, with the unit of mm; The M optical lenses are respectively arranged in the M stacked lens barrels (101). A circular groove (110) is provided on the side wall of each optical lens corresponding to the threaded hole (1011); The first screws (103) and the second screws (104) have the same length and are alternately arranged in the 2k threaded holes (1011). One end of the first screw (103) and the second screw (104) abuts against and is bonded to the corresponding circular groove (110), and the other end is threadedly connected to the threaded hole (1011). The end faces of the other ends of the first screw (103) and the second screw (104) are close to the outer side wall of the stacked lens barrel (101), or are flush with the outer side wall of the stacked lens barrel (101). A plurality of through grooves (1043) are axially provided on the side wall of the second screw (104).

2. The stacked aerospace optical lens according to claim 1, characterized in that: The first screw (103) includes a first threaded section (1031) and a first main section (1032); The axial length of the first threaded section (1031) is the same as the wall thickness of the stacked lens barrel (101), is arranged in the threaded hole (1011) of the stacked lens barrel (101), and is threadedly connected to the stacked lens barrel (101). The outer diameter of the first threaded section (1031) is larger than the outer diameter of the first main section (1032). One end of the first main section (1032) away from the first threaded section (1031) abuts against and is bonded to the circular groove (110) on the side wall of the optical lens. The outer diameter of the first main section (1032) satisfies the following relationship: d2 = d1 - 1.5, where d1 is the diameter of the circular groove (110), and d2 is the outer diameter of the first main section (1032), with the unit of mm.

3. The stacked aerospace optical lens according to claim 2, characterized in that: The second screw rod (104) includes a second threaded section (1041) and a second main body section (1042). The second threaded section (1041) has the same structure and size as the first threaded section (1031). The second threaded section (1041) is disposed in the threaded hole (1011) of the stacked lens barrel (101) and is threadedly connected to the stacked lens barrel (101). The outer diameter of the second threaded section (1041) is greater than the outer diameter of the second main body section (1042). The outer diameter of the second main body section (1042) satisfies the following relationship: d3 = d1 - 2, where d3 is the outer diameter of the second main body section (1042), and the unit is mm; The plurality of through grooves (1043) are oppositely opened on both sides of the central axis of the second main body section (1042), and the arrangement directions of the through grooves (1043) adjacent in the central axis direction are perpendicular to each other.

4. The stacked aerospace optical lens according to claim 3, wherein: The thickness w1 of the second main body section (1042) between the bottoms of the oppositely opened through grooves (1043) satisfies the following conditions: 0.1×d3 ≤ w1 ≤ 0.5×d3, One of a cross slot or a flat slot is provided on one end face of the first threaded section (1031), and the other of a cross slot or a flat slot is provided on the end face of the second threaded section (1041) away from the second main body section (1042).

5. The stacked aerospace optical lens according to claim 4, wherein: A plurality of elongated grooves (1033) are uniformly arranged along the circumferential direction on the outer side wall of one end of the first main body section (1032). The length of the elongated grooves (1033) in the axial direction is the same as the height of the circular groove (110). One end of the first main body section (1032) is coated with epoxy glue for bonding with the optical lens; The length of the second screw rod (104) is the same as that of the first screw rod (103). The end of the second main body section (1042) away from the second threaded section (1041) and the side wall of the second threaded section (1041) are both coated with silicone rubber.

6. The stacked aerospace optical lens according to any one of claims 1 to 5, wherein: One end of the stacked lens barrel (101) in the central axis direction is provided with an internal thread, and the other end is provided with an external thread. The specifications of the internal thread and the external thread are adapted to each other; The outer diameter of the adjustment lens barrel (102) is the same as the outer diameter of the stacked lens barrel (101). Internal threads and external threads are respectively provided at both ends along the axis. The internal thread and the external thread of the adjustment lens barrel (102) are adapted to the external thread and the internal thread of the stacked lens barrel (101). The starting and ending points of the internal thread of the stacked lens barrel (101), the starting and ending points of the external thread, the starting and ending points of the internal thread of the adjustment lens barrel (102), and the positions on the circumferences of the starting and ending points of the external thread all correspond to the same. Both ends of the adjustment lens barrel (102) are threadedly connected to the adjacent stacked lens barrels (101); Alternatively, clamping structures are respectively provided at one end and the other end of the stacked barrel (101); the outer diameter of the adjustment barrel (102) is the same as that of the stacked barrel (101), and clamping structures corresponding thereto are respectively provided at one end and the other end of the adjustment barrel (102); both ends of the adjustment barrel (102) are clamped and connected to the adjacent stacked barrels (101).

7. The stacked aerospace optical lens according to claim 6, wherein: further comprising a protection diaphragm (106) provided at the front end of the first stacked barrel (101) close to the light incident direction among the M stacked barrels (101), and / or an adapter mounting flange (105) provided at the rear end of the Mth stacked barrel (101) close to the light exit direction among the M stacked barrels (101); the protection diaphragm (106) includes a diaphragm and an annular connecting member circumferentially arranged thereon; The diameter R1 of the light incident port of the diaphragm satisfies the following relationship: 1≤R1 - R2≤2, wherein, R2 is the diameter of the first optical lens arranged along the light incident direction, with the unit of mm; One end of the annular connecting member is provided with a threaded structure for connection with the external thread or internal thread of the stacked barrel (101); alternatively, one end of the annular connecting member is provided with a clamping structure, and the annular connecting member is clamped with the stacked barrel (101); One end of the adapter mounting flange (105) is threadedly connected or clamped with the stacked barrel (101), and the other end is used for connection with other external structures.

Images