Stacked aerospace optical lens and assembly tool and assembly method thereof

Abstract

The present invention relates to aerospace optical lenses and assembly methods thereof, and specifically to stacked aerospace optical lenses and assembly tools and assembly methods thereof, in order to solve the shortcomings of the prior art that there are many parts that need to be processed, and secondary processing is required during the centering assembly, thereby reducing the assembly efficiency. The stacked aerospace optical lens of the present invention includes M stacked lens barrels, M optical lenses, M-1 adjustment lens barrels, M×k first screws and M×k second screws, wherein M≥2, 2≤k≤4, the specifications and sizes of the M stacked lens barrels are consistent, the M stacked lens barrels and the M-1 adjustment lens barrels are alternately arranged along the central axis, and the two ends of the adjustment lens barrel are detachably connected to the adjacent stacked lens barrels. At the same time, the present invention also provides an assembly tool and an assembly method for a stacked aerospace optical lens, which adjusts and bonds the optical lens to achieve reliable, convenient, high-precision and rapid assembly.

Description

Technical Field

[0001] The invention relates to a space optical lens and an assembly method thereof, and in particular to a stacked space optical lens and an assembly tool and an assembly method thereof. Background Art

[0002] In the prior art, aerospace optical lenses mostly use a lens frame, lens, pressure ring, spacer, and lens barrel structural design, and use a centring assembly processing method during assembly. This existing aerospace optical lens and centring assembly processing method requires a large number of processed parts, and secondary processing is required during centring assembly, which greatly reduces assembly efficiency. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art that a large number of parts need to be processed and secondary processing is required during centering and assembly, thereby reducing assembly efficiency, and to provide a stacked aerospace optical lens and its assembly tool and assembly method.

[0004] Invention concept:

[0005] The modular design concept is adopted for aerospace optical lenses, and the design concept of combining stacked lens barrels with adjustable lens barrels is adopted to reduce the number of processed parts and avoid secondary processing, so as to improve the manufacturing and assembly efficiency of aerospace optical lenses.

[0006] To achieve the above objectives, the technical solutions provided by the present invention are as follows:

[0007] A stacked aerospace optical lens, which is special in that it comprises M stacked lens barrels, M optical lenses, M-1 adjustment lens barrels, M×k first screws and M×k second screws, wherein M≥2, 2≤k≤4; the M stacked lens barrels have the same specifications and sizes, the M stacked lens barrels and the M-1 adjustment lens barrels are alternately arranged in sequence along the central axis, and the two ends of the adjustment lens barrel are detachably connected to the adjacent stacked lens barrels respectively; the side wall of the stacked lens barrel is uniformly distributed with 2k threaded holes along the circumferential direction, and the threaded holes on the M stacked lens barrels have the same corresponding circumferential positions; the inner diameter R0 of the stacked lens barrel satisfies the following relationship:

[0008] 1≤R0-R≤2,

[0009] Wherein, R is the maximum diameter of M optical lenses, in mm;

[0010] The M optical lenses are respectively arranged in M ​​stacked lens barrels, and a circular groove is arranged on the side wall of each optical lens corresponding to the threaded hole; the first screw and the second screw have the same length and are alternately arranged in the 2k threaded holes, one end of the first screw and the second screw are respectively abutted against and bonded to the corresponding circular grooves, and the other ends are threadedly connected to the threaded holes, and the other end faces of the first screw and the second screw are close to the outer wall of the stacked lens barrel, or are flush with the outer wall of the stacked lens barrel; the side wall of the second screw has a plurality of through grooves opened along the axial direction.

[0011] Further, the first screw includes a first threaded section and a first main body section;

[0012] The axial length of the first thread segment is the same as the wall thickness of the stacked lens barrel, and is disposed in the threaded hole of the stacked lens barrel and is threadedly connected to the stacked lens barrel. The outer diameter of the first thread segment is greater than the outer diameter of the first main body segment. An end of the first main body segment away from the first thread segment abuts against and adheres to the circular groove on the side wall of the optical lens, and the outer diameter of the first main body segment satisfies the following relationship:

[0013] d2=d1-1.5,

[0014] Wherein, d1 is the diameter of the circular groove, and d2 is the outer diameter of the first main body section, in mm.

[0015] Furthermore, the second screw 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 disposed in the threaded hole of the stacked lens barrel, and is threadedly connected to the stacked lens barrel, the outer diameter of the second threaded section is greater than the outer diameter of the second main body section; the outer diameter of the second main body section satisfies the following relationship:

[0016] d3=d1-2,

[0017] Wherein, d3 is the outer diameter of the second main body section, in mm;

[0018] The plurality of through slots are oppositely arranged along two sides of the central axis of the second main body section, and the through slots adjacent to each other along the central axis are arranged in directions perpendicular to each other.

[0019] Furthermore, a plurality of elongated grooves are evenly arranged on the outer side wall of one end of the first main body segment along the circumferential direction, and the length of the elongated grooves along the axial direction is the same as the height of the circular groove. One end of the first main body segment is coated with epoxy glue for bonding with the optical lens;

[0020] The length of the second screw is the same as that of the first screw, and the end of the second main body section away from the second thread section and the side wall of the second thread section are coated with silicone rubber;

[0021] The thickness w1 of the second main body section between the bottoms of the through grooves opened opposite to each other satisfies the following conditions:

[0022] 0.1×d3≤w1≤0.5×d3,

[0023] One end surface of the first thread segment is provided with a cross groove or a straight groove, and one end surface of the second thread segment away from the second main body segment is provided with the other of the cross groove or the straight groove.

[0024] Further, one end of the stacked lens barrel along the central axis 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, and the line connecting the starting and ending points of the internal thread and the starting and ending points of the external thread is parallel to the central axis;

[0025] The outer diameter of the adjusting lens barrel is the same as that of the stacked lens barrel, and internal threads and external threads are respectively provided at both ends along the axis, and the specifications of the internal threads and external threads of the adjusting lens barrel are adapted to those of the external threads and internal threads of the stacked lens barrel; the two ends of the adjusting lens barrel are respectively threadedly connected to adjacent stacked lens barrels;

[0026] Alternatively, one end portion and the other end portion of the stacked lens barrel are respectively provided with a clamping structure; the outer diameter of the adjustment lens barrel is the same as the outer diameter of the stacked lens barrel, and one end portion and the other end portion of the adjustment lens barrel are respectively provided with a corresponding clamping structure; the two ends of the adjustment lens barrel are respectively clamped and connected with adjacent stacked lens barrels.

[0027] Furthermore, it also includes a protective aperture arranged at the front end of a first stacked lens barrel near the light incident direction among the M stacked lens barrels, and / or an adapter mounting flange arranged at the rear end of an Mth stacked lens barrel near the light emitting direction among the M stacked lens barrels;

[0028] The protective aperture includes an aperture and an annular connecting member arranged circumferentially therewith;

[0029] The light entrance diameter R1 of the aperture satisfies the following relationship:

[0030] 1≤R1-R2≤2,

[0031] Wherein, R2 is the diameter of the first optical lens arranged along the light incident direction, in mm;

[0032] One end of the annular connector is provided with a thread structure, which is connected to the external thread or internal thread of the stacked lens barrel; or one end of the annular connector is provided with a clamping structure, and the annular connector is clamped to the stacked lens barrel;

[0033] One end of the adapter mounting flange is threadedly connected or clamped to the stacked lens barrel, and the other end is used to connect to other external structures.

[0034] The present invention also provides an assembly tool for the above-mentioned stacked aerospace optical lens, which is special in that it includes an assembly mounting frame and a visible light emitting device and a detection device arranged on both sides of the assembly mounting frame; the visible light emitting device and the detection device are respectively fixed to the optical platform through connecting brackets, the visible light emitting device is used to emit visible light, and the detection device is used to receive visible light; the assembly mounting frame includes two coaxially arranged annular brackets, k horizontal guide shafts uniformly distributed along the circumference of the annular brackets, and multiple adjustment mechanisms arranged on each horizontal guide shaft; the two annular brackets, the emitting end of the visible light emitting device and the receiving end of the detection device are coaxially arranged It is arranged on the optical platform; the two ends of the horizontal guide shaft are respectively connected to the two annular brackets and are parallel to the central axis of the annular brackets; the adjustment mechanism includes a positioning ring, a telescopic rod and a first locking button, the positioning ring is sleeved on the horizontal guide shaft, the inner side wall of the positioning ring and the outer side wall of the horizontal guide shaft are slidably matched, so that the positioning ring can move along the axial direction of the horizontal guide shaft, the first locking button passes through the positioning ring, and the inner end is against the horizontal guide shaft, and the first locking button is adjusted to achieve locking or loosening between the positioning ring and the horizontal guide shaft; one end of the telescopic rod is connected to the positioning ring, and the other end is used to limit and fix the optical lens through the threaded hole.

[0035] Furthermore, the side wall of the horizontal guide shaft is provided with a limiting edge along its axial direction, and the inner side wall of the positioning ring is provided with a groove matching the limiting edge, which is used to limit the initial angle of the adjustment mechanism so that the initial angle of the telescopic rod is toward the central axis;

[0036] k of the horizontal guide shafts are respectively arranged corresponding to the threaded holes where the second screw rod is located; wherein k=2, the two horizontal guide shafts are respectively located on the left and right sides of the annular bracket; or k=3, one of the horizontal guide shafts is located at the top of the annular bracket; or k=4, the four horizontal guide shafts are respectively located on the upper left, upper right, lower left, and lower right of the annular bracket, and are symmetrically arranged;

[0037] The telescopic rod comprises a first adjustment rod and a second adjustment rod sequentially arranged along the axial direction, one end of the first adjustment rod is connected to the positioning ring through a ball hinge, and the second locking button is arranged on the ball hinge for locking or loosening the ball hinge;

[0038] The second adjustment rod is telescopically connected to the first adjustment rod via a third locking button disposed on the first adjustment rod, and the diameter d4 of the second adjustment rod satisfies the following relationship:

[0039] d4=d1-1, unit: mm.

[0040] At the same time, the present invention also provides a method for assembling the stacked aerospace optical lens, using the assembly tool for the stacked aerospace optical lens; the method is special in that it includes the following steps:

[0041] S1, selecting a corresponding stacked lens barrel according to the maximum diameter of the M optical lenses;

[0042] S2, selecting a first screw of appropriate length, and assembling the M optical lenses in corresponding stacked lens barrels respectively through the first screw;

[0043] S3, selecting M-1 adjustment lens barrels according to the spacing of the optical lenses in the optical axis direction, connecting the M stacked lens barrels and the M-1 adjustment lens barrels to obtain a lens assembly;

[0044] S4, passing the other end of the telescopic rod of the assembly mounting frame through the threaded hole on the side wall of the stacked lens barrel, with the end thereof abutting against the circular groove on the side wall of the optical lens, so that the lens assembly is placed on the assembly tool of the stacked aerospace optical lens;

[0045] S5, removing the first screw corresponding to each optical lens;

[0046] S6, control the visible light emitting device to emit visible light, which passes through each optical lens in turn and is received by the detection device, and judge whether the position of each optical lens is appropriate according to the received visible light. If it is appropriate, enter step S7; if it is not appropriate, adjust the position of the positioning ring and / or the angle and / or the length of the telescopic rod until the position of each optical lens meets the requirements according to the received visible light;

[0047] S7, applying adhesive to the portion of one end of the first screw located in the circular groove, and installing it to the corresponding position of each optical lens, waiting for the adhesive to solidify, and removing the lens assembly from the assembly mounting frame;

[0048] S8, selecting a second screw, and applying silicone rubber to a portion of one end of the second screw located in the circular groove and an outer wall of the thread of the other end;

[0049] S9, install the second screw at the corresponding position, tighten it and let it stand, wait for the silicone rubber to solidify, complete the assembly, and obtain the stacked aerospace optical lens.

[0050] Furthermore, after the M stacked lens barrels and the M-1 adjustment lens barrels are connected in step S3, the method further includes selecting a protective aperture and / or an adapter mounting flange of matching size and installing them in place respectively;

[0051] In step S4, when the lens assembly is placed on the assembly mounting frame, one of the first screws in the circumferential direction of each optical lens is located at the bottom;

[0052] In step S7, adhesive is applied to the portion of one end of the first screw rod located in the circular groove, and the first screw rod is installed at the corresponding position of each optical lens. Specifically, adhesive is applied to the portion of one end of the first screw rod located in the circular groove, and a first screw rod of each optical lens is first installed in the corresponding lower threaded hole so that the end face of the other end is flush with the outer side wall of the stacked lens barrel, and then the remaining first screw rods are installed and tightened. After the adhesive is cured, the telescopic rod is shortened and the lens assembly is removed from the assembly mounting frame.

[0053] Beneficial effects of the present invention:

[0054] 1. The stacked aerospace optical lens of the present invention is based on a modular and standardized design. Compared with traditional aerospace optical lenses, it improves the manufacturing and assembly efficiency, and is conducive to the rapid mass production and assembly of aerospace optical lenses.

[0055] 2. Aiming at the special usage scenarios and requirements of aerospace optical lenses, the present invention provides a first screw and a second screw, which respectively play the role of main fixing and auxiliary fixing of the optical lens. This can not only reduce the impact of adverse mechanical environments such as rocket vibration and impact on the aerospace optical lens and the optical lens therein during rocket launch, but also reduce the impact of temperature changes in the space environment on the optical lens after entering space, thereby maintaining better optical performance.

[0056] 3. The assembly tool of the stacked aerospace optical lens of the present invention is provided with a plurality of horizontal guide shafts and adjustment mechanisms, and the optical lens is limited and adjusted by adjusting the telescopic rod of the adjustment mechanism, so as to facilitate the positioning of the optical lens and improve the positioning stability and accuracy.

[0057] 4. The assembly method of the stacked aerospace optical lens of the present invention utilizes a unique assembly tool to adjust and bond the optical lens, thereby achieving reliable, convenient, high-precision and rapid assembly.

[0058] 5. The stacked aerospace optical lens and the assembly method thereof of the present invention adopt modular and standardized design, manufacturing, and assembly concepts, which have a very positive significance for the rapid mass production and assembly of aerospace optical lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a schematic structural diagram of an embodiment of a stacked aerospace optical lens of the present invention;

[0060] Figure 2 It is a schematic diagram of the structure of other embodiments of the stacked aerospace optical lens of the present invention;

[0061] Figure 3 1 is a schematic structural diagram of a stacked lens barrel in an embodiment of a stacked aerospace optical lens of the present invention;

[0062] Figure 42 is a schematic diagram of the structure of the first optical lens in the stacked aerospace optical lens embodiment of the present invention;

[0063] Figure 5 It is a schematic diagram of the structure of adjusting the lens barrel in the embodiment of the stacked aerospace optical lens of the present invention;

[0064] Figure 6 2 is a schematic diagram of the structure of the first screw in the stacked aerospace optical lens embodiment of the present invention;

[0065] Figure 7 2 is a schematic diagram of the structure of the second screw in the stacked aerospace optical lens embodiment of the present invention;

[0066] Figure 8 yes Figure 1 A-direction view;

[0067] Fig. 9 yes Figure 8 BB section view in;

[0068] Fig.10 Schematic diagram of the structure of the protective aperture in the stacked aerospace optical lens embodiment of the present invention;

[0069] Fig.11 It is a structural schematic diagram of the adapter mounting flange in the stacked aerospace optical lens embodiment of the present invention;

[0070] Fig.12 1 is a schematic structural diagram of an embodiment of an assembly tool for stacked aerospace optical lenses of the present invention (the connecting bracket is not shown);

[0071] Fig.13 2 is a schematic structural diagram of a horizontal guide shaft in an embodiment of an assembly tool for stacked aerospace optical lenses of the present invention;

[0072] Fig.14 It is a structural schematic diagram of an adjustment mechanism in an embodiment of an assembly tool for stacked aerospace optical lenses of the present invention;

[0073] Fig.15 It is a schematic diagram of the assembly structure of the first optical lens in step 2 of an embodiment of the method for assembling a stacked aerospace optical lens of the present invention;

[0074] Fig.16 1 is a schematic diagram of the assembly structure of step 3 in an embodiment of the method for assembling a stacked aerospace optical lens of the present invention;

[0075] Fig.17 is a schematic diagram of the assembly structure of step 4 in an embodiment of the method for assembling a stacked aerospace optical lens of the present invention;

[0076] Fig.181 is a schematic diagram of the assembly structure of step 5 in an embodiment of the method for assembling a stacked aerospace optical lens of the present invention (the connecting bracket is not shown).

[0077] Description of reference numerals:

[0078] 101-stacked lens barrel, 1011-threaded hole, 102-adjusting lens barrel, 103-first screw rod, 1031-first threaded section, 1032-first main body section, 1033-long groove, 104-second screw rod, 1041-second threaded section, 1042-second main body section, 1043-through groove, 105-adaptive mounting flange, 106-protective aperture, 107-first optical lens, 108-second optical lens, 109-third optical lens, 110-circular groove;

[0079] 201-visible light emitting device, 202-detection device, 203-annular bracket, 204-horizontal guide shaft, 2041-limiting edge, 205-adjustment mechanism, 2051-positioning ring, 2052-telescopic rod, 2053-first adjustment rod, 2054-second adjustment rod, 2055-first locking button, 2056-second locking button, 2057-third locking button, 2058-ball hinge. DETAILED DESCRIPTION

[0080] The overall structure of the stacked aerospace optical lens of the present invention is as follows Figure 1 As shown, it includes a protective diaphragm 106, M stacked lens barrels 101, M optical lenses, M-1 adjustment lens barrels 102, M×k first screws 103, M×k second screws 104 and an adapter mounting flange 105, wherein M≥2, 2≤k≤4; the M stacked lens barrels 101 and the M-1 adjustment lens barrels 102 are alternately arranged along the central axis, and the two ends of the adjustment lens barrel 102 are detachably connected to the adjacent stacked lens barrels 101, and in this embodiment, threaded connection is adopted. The M optical lenses are respectively installed in the M stacked lens barrels 101, and in this embodiment, M=3.

[0081] The specifications and sizes of the M stacked lens barrels 101 are consistent. The inner diameter R0 of the stacked lens barrel 101 is 1-2 mm larger than the maximum diameter R of the M optical lenses. One end of the stacked lens barrel 101 along the central axis is set as an internal thread, and the other end is set as an external thread. The internal thread and the external thread are compatible, and the important parameters are consistent, including the tooth type, nominal diameter, number of threads, pitch, hand direction, screw length, and the start and end positions in the circumferential direction, which is convenient for improving the installation efficiency. When manufacturing and assembling a large number of aerospace optical lenses, the stacked lens barrel 101 can be manufactured in several pieces according to the sizes of different stacked aerospace optical lenses for use in rapid assembly.

[0082] like Figure 3As shown, the side wall of the stacked lens barrel 101 is uniformly distributed with 2k threaded holes 1011 along the circumferential direction, and 2k circular grooves 110 are respectively arranged on the side wall 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 arranged. Figure 4 As shown, the diameter d1 of the circular groove 110 ranges from 3 to 3.5 mm, and the depth h1 of the circular groove 110 ranges from 2 to 3 mm.

[0083] The present invention sets M-1 adjustment lens barrels 102 as modular standard parts, and the inner and outer diameters thereof are completely consistent with the selected stacked lens barrel 101, such as Figure 5 As shown, one end portion along the axial direction is set as an internal thread, and the other end portion is set as an external thread, the internal thread and the external thread are adapted, and the important parameters are consistent with the stacked lens barrel 101. The main function of the adjustment lens barrel 102 is to make the spacing of the optical lenses in the axial direction meet the design requirements. Therefore, different axial lengths L1 of the adjustment lens barrel 102 are selected according to the actual optical design requirements. The adjustment lens barrel 102 can be made in advance in several pieces, and the difference mainly lies in the axial length L1. In this embodiment, the axial lengths L1 of different adjustment lens barrels 102 are increased by 0.25mm.

[0084] The starting and ending points of the internal and external threads of the stacked lens barrel 101 and the starting and ending points of the internal and external threads of the adjustment lens barrel 102 are all in the same position on the circumference, and the positions of the threaded holes 1011 on the stacked lens barrel 101 relative to the starting and ending points of the internal and external threads are also the same in the circumferential direction, ensuring that the positions of the threaded holes 1011 on the M stacked lens barrels 101 in the circumferential direction are respectively the same when connected each time, such as Figure 8 shown.

[0085] In other embodiments of the present invention, one end portion and the other end portion of the stacked lens barrel 101 are respectively provided with a clamping structure, the outer diameter of the adjustment lens barrel 102 is the same as the outer diameter of the stacked lens barrel 101, and one end portion and the other end portion of the adjustment lens barrel 102 are respectively provided with a corresponding clamping structure, and the two ends of the adjustment lens barrel 102 are respectively clamped and connected with adjacent stacked lens barrels 101.

[0086] The first screw 103 and the second screw 104 have the same length. Each stacked lens barrel 101 corresponds to three first screws 103 and two second screws 104 respectively. The first screw 103 and the second screw 104 are alternately arranged in six threaded holes 1011, one end of which is respectively abutted against the circular groove 110 on the side wall of the optical lens, and the other end is threadedly connected to the threaded hole 1011 for adjusting and positioning the optical lens, wherein the first screw 103 is connected to the optical lens by epoxy glue to achieve the main fixing function, and the second screw 104 is fixed to the optical lens with the auxiliary aid of silicone rubber.

[0087] The first screw 103 is configured as a modular part, such as Figure 6 As shown, it includes a first threaded section 1031 and a first main section 1032. The outer diameter of the first threaded section 1031 is greater than the outer diameter of the first main section 1032. The outer diameter of the first main section 1032 satisfies the following relationship: d2=d1-1.5, wherein d2 is the outer diameter of the first main section 1032, in mm. The end of the first main 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 lens barrel 101. The outer side wall is provided with a thread matching the threaded hole 1011 of the stacked lens barrel 101. When in use, the appropriate length of the first screw 103 should be selected according to actual conditions, so that the end surface of the first threaded section 1031 away from the first main section 1032 is just near the outer side wall of the stacked lens barrel 101, preferably flush with it. Preferably, a plurality of elongated grooves 1033 are evenly arranged along the circumferential direction on the outer side wall at one end of the first main body section 1032, and the length of the elongated groove 1033 along the axial direction is denoted as h2, where h2=h1. Epoxy glue is applied in the elongated groove 1033 for bonding with the optical lens, and the structure of the elongated groove 1033 can increase the contact area of ​​the epoxy glue, thereby improving the bonding performance.

[0088] The second screw 104 is configured as a modular part, such as Figure 7 As shown, it includes a second thread segment 1041 and a second main body segment 1042. The second thread segment 1041 has the same structure and size as the first thread segment 1031. The outer diameter of the second thread segment 1041 is larger than the outer diameter of the second main body segment 1042, and matches the threaded hole 1011 of the stacked lens barrel 101. The outer diameter of the second main body segment 1042 satisfies the following relationship: d3=d1-2, wherein d3 is the outer diameter of the second main body segment 1042, in mm. When in use, the appropriate length of the second screw 104 should be selected according to actual conditions. For the same optical lens, when the length L2 of the first screw 103 is selected, the length L3 of the second screw 104 should also be the same. The second main body section 1042 has multiple through slots 1043 on both sides along the central axis, and the through slots 1043 adjacent to each other along the central axis are arranged perpendicular to each other. Through this structure, multiple through slots 1043 are staggered on the side wall of the second main body section 1042, which can weaken the rigidity of the second screw 104 and make the second screw 104 have a certain flexibility. The thickness of the second main body section 1042 between the bottoms of the through slots 1043 opened oppositely is recorded as w1, which meets the following conditions: 0.1×d3≤w1≤0.5×d3.

[0089] In the present invention, the optical lens is mainly clamped and fixed by the first screw 103, so the second screw 104 does not need to have too strong rigidity, so as to avoid generating large assembly stress on the optical lens due to too many strong constraints, thereby affecting the imaging quality of the lens; in addition, the lens is used in a space environment with a large temperature difference, and staggered opening of multiple through grooves 1043 can reduce the second screw 104 from transferring excessive thermal deformation to the optical lens, thereby affecting the imaging quality of the aerospace optical lens. In the present invention, when the aerospace optical lens is carried on a rocket and launched into space, the rocket will generate large vibration and impact on it, so the first screw 103 and the second screw 104 of different structures must be set at the same time, and the combination of the two to clamp and fix the optical lens can well reduce the impact of vibration and impact on the aerospace optical lens and the optical lens therein. During mass processing and assembly, a plurality of first screws 103 and second screws 104 may be prepared in advance, each of which has a plurality of different lengths. The lengths L2 of the different first screws 103 increase by 0.25 mm, and the lengths L3 of the second screws 104 also increase by 0.25 mm.

[0090] To facilitate adjustment and distinction and reduce the possibility of errors in assembly, in this embodiment, a cross groove and a slot are respectively provided on the end face of the first thread segment 1031 away from the first main body segment 1032 and the end face of the second thread segment 1041 away from the second main body segment 1042; in other embodiments, the cross groove and the slot can also be provided interchangeably.

[0091] like Fig. 9 As shown in FIG. 1 , 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. The protective aperture 106 is arranged on the side of the first optical lens 107 close to the light incident direction, and includes an annular connecting member arranged around the aperture and the circumference thereof, such as Fig.10As shown, the diameter R1 of the light entrance of the aperture is 1-2mm larger than the diameter R2 of the first optical lens arranged along the light incident direction. In the present embodiment, R2 is the diameter of the first optical lens 107. The protective aperture 106 can play two roles. One is to prevent external stray light from entering the interior of the lens, thereby improving the optical performance of the lens, and the other is to prevent large particles of dust or debris from entering the lens. One end of the outer wall of the annular connector is designed with a threaded structure for threaded connection with the stacked lens barrel 101. The threaded structure is adapted to the internal thread on the stacked lens barrel 101, and each important parameter is the same. In other embodiments of the present invention, the threaded structure can also be arranged on one end of the inner wall of the annular connector to adapt to the external thread of the stacked lens barrel 101. The protective aperture 106 is also a modular part. When mass processing and assembly are performed, several protective apertures 106 can be prepared in advance. Several protective apertures 106 have multiple different light entrance diameters, and different light entrance diameters increase by 1mm.

[0092] The adapter mounting flange 105 is disposed at a position close to the light emitting direction of the third optical lens 109 and is used to connect with other external structures, such as Fig.11 As shown, the inner wall of the adapter mounting flange 105 is designed with mounting threads, which are matched with the external threads 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 may not be provided, such as Figure 2 As shown, the stacked lens barrel 101 is directly connected to other external structures through the external threads on the stacked lens barrel 101, and the axial arrangement direction of the stacked lens barrel 101 and the adjustment lens barrel 102 can be adjusted as needed.

[0093] Therefore, the stacked aerospace optical lens of the present invention can quickly select corresponding parts and thus be quickly assembled through modular and standardized design. 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, thereby improving assembly efficiency.

[0094] Fig.12The schematic diagram of the assembly tool of the stacked aerospace optical lens is shown, which mainly includes an assembly mounting frame and a visible light emitting device 201 and a detection device 202 arranged on both sides thereof 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 posture and spatial position of each optical lens are accurate. The assembly mounting frame mainly includes two coaxially arranged annular brackets 203, k horizontal guide shafts 204 uniformly distributed along the circumference of the annular brackets 203, and multiple adjustment mechanisms 205 arranged on each horizontal guide shaft 204. In this embodiment, k=3, and one horizontal guide shaft 204 is located at the top of the annular bracket 203. In other embodiments of the present invention, k=2, and the two horizontal guide shafts 204 are respectively located on the left and right sides of the annular bracket 203, or k=4, and the four horizontal guide shafts 204 are respectively located on 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 downward. During assembly, the positions of the three horizontal guide shafts 204 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. The two ends of the horizontal guide shaft 204 are respectively connected to the two annular brackets 203, and are parallel to the central axis of the annular bracket 203. The side wall of the horizontal guide shaft 204 has a limiting edge 2041 along its axial direction, such as Fig.13 shown.

[0095] Adjustment mechanism 205 Fig.14 As shown, it includes a positioning ring 2051, a telescopic rod 2052, a first locking button 2055 and a second locking button 2056. The positioning ring 2051 is sleeved on the horizontal guide shaft 204, and the inner wall and the outer wall of the horizontal guide shaft 204 are slidably fitted together, so that the positioning ring 2051 can move axially along the horizontal guide shaft 204. The inner wall of the positioning ring 2051 is provided with a groove matching the limiting edge 2041, which is used to limit the initial angle of the telescopic rod 2052. When in use, the telescopic rod 2052 needs to pass through the threaded hole 1011 corresponding to the second screw rod 104. The limiting edge 2041 makes the initial angle of the telescopic rod 2052 face the central axis. There is no need to adjust the angle during the assembly process, thereby improving the assembly efficiency. In this embodiment, the central angle corresponding to adjacent horizontal guide shafts 204 is 120°, and the limiting edges 2041 of the three horizontal guide shafts 204 are also evenly arranged at 120° intervals along the circumference of the annular bracket 203 in space.

[0096] The first locking button 2055 passes through the positioning ring 2051 and the inner end thereof abuts against the horizontal guide shaft 204. The first locking button 2055 is rotated to achieve locking and loosening between the positioning ring 2051 and the horizontal guide shaft 204. The telescopic rod 2052 includes a first adjustment rod 2053 and a second adjustment rod 2054 sequentially arranged along the axial direction. One end of the first adjustment rod 2053 is connected to the positioning ring 2051 through a ball hinge 2058, so that the first adjustment rod 2053 can rotate relative to the positioning ring 2051. The second locking button 2056 is arranged on the ball hinge 2058, and is used to lock or loosen the ball hinge 2058. The second adjustment rod 2054 is telescopically connected to the first adjustment rod 2053 and can be telescopic along the axial direction of the first adjustment rod 2053. The adjustment mechanism 205 also includes a third locking button 2057, which is arranged at the connection between the second adjustment rod 2054 and the first adjustment rod 2053 and is used to lock or loosen the second adjustment rod 2054. In this embodiment, the first adjustment rod 2053 is set as a hollow structure, and the second adjustment rod 2054 is nested in the first adjustment rod 2053. The diameter d4 of the second adjustment rod 2054 satisfies the following relationship: d4=d1-1, in mm. The adjustment mechanism 205 can be set with multiple different specifications. When assembling and installing, the required adjustment mechanism 205 is taken according to the actual situation.

[0097] Based on the above-mentioned assembly tool, the assembly method of the stacked aerospace optical lens specifically includes the following steps:

[0098] Step 1, according to the diameter value of the optical lens with the largest diameter, select a stacked lens barrel 101 of appropriate size; it should be noted that in the same stacked aerospace optical lens, all stacked lens barrels 101 have the same specifications; in this embodiment, three stacked lens barrels 101 are selected.

[0099] Step 2, assembling corresponding optical lenses in each stacked lens barrel 101;

[0100] Taking the first optical lens 107 as an example, the first optical lens 107 is placed in the middle position of the stacked lens barrel 101. Since the diameter of the first optical lens 107 and the specifications of the stacked lens barrel 101 are known, three first screws 103 adapted thereto can be selected through calculation. The three first screws 103 are arranged in six threaded holes 1011 of the stacked lens barrel 101 at intervals. A cross screwdriver is used to gradually tighten the three first screws 103. When the end faces of the first threaded segments 1031 of the three first screws 103 are flush with the outer side wall of the stacked lens barrel 101, the first optical lens 107 is in the middle position of the stacked lens barrel, as shown in FIG. Fig.15 shown.

[0101] Similarly, the second optical lens 108 and the third optical lens 109 are respectively installed into the corresponding stacked lens barrel 101. This process requires selecting a matching first screw 103 according to the diameter of the optical lens.

[0102] Step 3, according to the spacing of the optical lenses in the optical axis direction, and considering the axial size of the stacked lens barrel 101, select an appropriate adjustment lens barrel 102, and connect the stacked lens barrel 101 and the adjustment lens barrel 102 through threads. The completed state is as follows: Fig.16 shown.

[0103] Step 4, select a protective aperture 106 of matching size according to 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, such as Fig.17 In other embodiments of the present invention, the protective aperture 106 and / or the adapter mounting flange 105 may not be provided, and the lens assembly is directly obtained in step 3, and the process proceeds to step 5.

[0104] Step 5, adjust the adjustment mechanism 205 so that the second adjustment rod 2054 passes through the remaining threaded hole 1011 on the side wall of the stacked lens barrel 101, and the end thereof abuts against the circular groove 110 opened on the side wall of the optical lens. Fig.18 As shown, the lens assembly is placed on the assembly mounting frame, and one of the first screw rods 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, so 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, and this gap provides space for subsequent fine adjustment of the posture and spatial position of each optical lens.

[0105] Step 6: Remove all first screws 103 using a Phillips screwdriver.

[0106] Step 7, control the visible light emitting device 201 to emit visible light, which passes through three optical lenses and is received by the detection device 202. Determine whether the position of each optical lens is appropriate based on the received visible light. If appropriate, proceed to the next step. If not, make fine adjustments until the received visible light meets the requirements.

[0107] There are three operations for fine-tuning:

[0108] (1) Adjust the first locking button 2055 to allow the entire adjustment mechanism 205 to move appropriately along the horizontal guide axis 204 to adjust the intervals between the optical lenses.

[0109] (2) Adjust the second locking button 2056 so that the telescopic rod 2052 can rotate appropriately to adjust the pitch, yaw and other postures of each optical lens.

[0110] (3) Adjust the third locking button 2057, appropriately extend or shorten the second adjustment rod 2054, and adjust the central axis of the optical lens so that it is located in the middle of the stacked lens barrel 101, while temporarily and stably clamping the optical lens.

[0111] The above three operations can be used in combination, or only one or two of them can be used, and the order of the three operations is not emphasized. After fine adjustment, the stacked aerospace optical lens achieves better optical performance, and the end of the second adjustment rod 2054 abuts against the bottom surface of the circular groove 110 on the side wall of the optical lens, which plays a temporary clamping role for the optical lens.

[0112] Step 8, apply epoxy glue to the part in the circular groove 110 corresponding to one end of the first screw 103, and the applied area of ​​the side wall is within the range of the axial length less than h2 at one end of the first main section 1032. First, install one first screw 103 of each optical lens into the lower threaded hole 1011 so that the other end face is flush with the outer side wall of the stacked lens barrel 101, and then install and tighten the remaining first screws 103. In this process, the lens assembly is always placed on the assembly mounting frame. After the glue is cured, control the third locking button 2057, shorten the second adjustment rod 2054, and remove the lens assembly from the assembly mounting frame.

[0113] Step 9, select a matching second screw 104 according to the specifications of the first screw 103 selected for each optical lens, and apply silicone rubber to one end of the second main section 1042 of the second screw 104 away from the second threaded section 1041 and the outer wall of the second threaded section 1041. The coated area at one end of the second main section 1042 is the area located in the circular groove 110. In this embodiment, the silicone rubber model is preferably GD414. The silicone rubber is used to assist in anti-loosening to prevent the second screw 104 from rotating at the threaded connection during actual use.

[0114] Step 10, immediately install the second screw 104 coated with silicone rubber at the corresponding position and tighten it with a flat-blade screwdriver. When tightening, gradually increase the force and let it stand until the silicone rubber is cured. The assembly is completed to obtain a stacked aerospace optical lens. Figure 1 shown.

Claims

1. An assembly tool for stacked aerospace optical lenses, characterized in that: The stacked aerospace optical lens comprises M stacked lens barrels (101), M optical lenses, M-1 adjustment lens barrels (102), M×k first screw rods (103) and M×k second screw rods (104), wherein M≥2, 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 adjustment lens barrels (102) are alternately arranged in sequence along the central axis, and both ends of the adjustment lens barrel (102) are detachably connected to adjacent stacked lens barrels (101); The side wall of the stacked lens barrel (101) is uniformly provided with 2k threaded holes (1011) along the circumferential direction, and the threaded holes (1011) on the M stacked lens barrels (101) have the same corresponding circumferential positions; the inner diameter R0 of the stacked lens barrel (101) satisfies the following relationship: 1≤R0-R≤2, Wherein, R is the maximum diameter of M optical lenses, in mm; The M optical lenses are respectively arranged in M ​​stacked lens barrels (101), and a circular groove (110) is arranged on the side wall of each optical lens corresponding to the threaded hole (1011); The first screw rod (103) and the second screw rod (104) have the same length and are alternately arranged in the 2k threaded holes (1011); one end of the first screw rod (103) and the second screw rod (104) are respectively abutted against and bonded to the corresponding circular groove (110), and the other end thereof is threadedly connected to the threaded hole (1011); the other end surfaces of the first screw rod (103) and the second screw rod (104) are close to the outer wall of the stacked lens barrel (101), or are flush with the outer wall of the stacked lens barrel (101); and a plurality of through grooves (1043) are provided on the side wall of the second screw rod (104) along the axial direction; The assembly tool comprises an assembly mounting frame and a visible light emitting device (201) and a detection device (202) arranged on both sides of the assembly mounting frame; The visible light emitting device (201) and the detection device (202) are respectively fixed on the optical platform via connecting brackets; the visible light emitting device (201) is used to emit visible light, and the detection device (202) is used to receive visible light; The assembly mounting frame comprises two coaxially arranged annular supports (203), k horizontal guide shafts (204) evenly distributed along the circumference of the annular supports (203), and a plurality of adjustment mechanisms (205) arranged on each horizontal guide shaft (204); The two annular brackets (203), the emitting end of the visible light emitting device (201) and the receiving end of the detection device (202) are coaxially arranged on an optical platform; Both ends of the horizontal guide shaft (204) are respectively connected to the two annular supports (203) and are parallel to the central axis of the annular supports (203); The adjustment mechanism (205) comprises a positioning ring (2051), a telescopic rod (2052) and a first locking button (2055); the positioning ring (2051) is sleeved on the horizontal guide shaft (204); the inner side wall of the positioning ring (2051) and the outer side wall of the horizontal guide shaft (204) are slidably matched, so that the positioning ring (2051) can move along the axial direction of the horizontal guide shaft (204); the first locking button (2055) passes through the positioning ring (2051), and the inner end thereof abuts against the horizontal guide shaft (204); the first locking button (2055) is adjusted to achieve locking or loosening between the positioning ring (2051) and the horizontal guide shaft (204); one end of the telescopic rod (2052) is connected to the positioning ring (2051), and the other end is used to limit and fix the optical lens through the threaded hole (1011).

2. The assembly tool for stacked aerospace optical lenses according to claim 1, characterized in that: The side wall of the horizontal guide shaft (204) is provided with a limiting edge (2041) along the axial direction thereof, and the inner side wall of the positioning ring (2051) is provided with a groove matching the limiting edge (2041) for limiting the initial angle of the adjustment mechanism (205) so that the initial angle of the telescopic rod (2052) is oriented toward the central axis; k of the horizontal guide shafts (204) are respectively arranged corresponding to the threaded holes (1011) where the second screw rod (104) is located; wherein k=2, the two horizontal guide shafts (204) are respectively located on the left and right sides of the annular bracket (203); or k=3, one of the horizontal guide shafts (204) is located at the top of the annular bracket (203); or k=4, the four horizontal guide 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; The telescopic rod (2052) comprises a first adjustment rod (2053) and a second adjustment rod (2054) which are sequentially arranged along the axial direction; one end of the first adjustment rod (2053) is connected to the positioning ring (2051) via a ball hinge (2058); and a second locking button (2056) is arranged on the ball hinge (2058) and is used to lock or loosen the ball hinge (2058); The second adjustment rod (2054) is telescopically connected to the first adjustment rod (2053) via a third locking button (2057) provided on the first adjustment rod (2053), and a diameter d4 of the second adjustment rod (2054) satisfies the following relationship: d4=d1-1, unit: mm.

3. A method for assembling a stacked aerospace optical lens, using the assembly tool for the stacked aerospace optical lens according to claim 1 or 2; characterized in that: The following steps are involved: S1, selecting a corresponding stacked lens barrel (101) according to the maximum diameter of the M optical lenses; S2, selecting a first screw rod (103) of appropriate length, and assembling the M optical lenses in corresponding stacked lens barrels (101) respectively through the first screw rod (103); S3, selecting M-1 adjustment lens barrels (102) according to the spacing of the optical lenses in the optical axis direction, and connecting the M stacked lens barrels (101) and the M-1 adjustment lens barrels (102) to obtain a lens assembly; S4, passing the other end of the telescopic rod (2052) of the assembly mounting frame through the threaded hole (1011) on the side wall of the stacked lens barrel (101), with the end thereof abutting against the circular groove (110) on the side wall of the optical lens, so that the lens assembly is placed on the assembly tool of the stacked aerospace optical lens; S5, removing the first screw (103) corresponding to each optical lens; S6, controlling the visible light emitting device (201) to emit visible light, which passes through each optical lens in turn and is received by the detection device (202), and judging whether the position of each optical lens is appropriate based on the received visible light; if so, proceeding to step S7; if not, adjusting the position of the positioning ring (2051) and / or the angle of the telescopic rod (2052) and / or the length of the telescopic rod (2052) until the position of each optical lens meets the requirements based on the received visible light; S7, applying adhesive to the portion of one end of the first screw (103) located in the circular groove (110), installing it to the corresponding position of each optical lens, waiting for the adhesive to solidify, and removing the lens assembly from the assembly mounting frame; S8, selecting a second screw (104), and coating silicone rubber on a portion of one end of the second screw (104) located in the circular groove (110) and an outer wall of the thread of the other end; S9, installing the second screw (104) at the corresponding position, tightening it and leaving it to stand, waiting for the silicone rubber to solidify, completing the assembly, and obtaining a stacked aerospace optical lens.

4. The method for assembling a stacked aerospace optical lens according to claim 3, characterized in that: After the M stacked lens barrels (101) and the M-1 adjustment lens barrels (102) are connected in step S3, the method further includes selecting a protective diaphragm (106) and / or an adapter mounting flange (105) of matching size and installing them in place respectively; In step S4, when the lens assembly is placed on the assembly mounting frame, one of the first screw rods (103) in the circumferential direction of each optical lens is located at the bottom; In step S7, adhesive is applied to the portion of one end of the first screw rod (103) located in the circular groove (110), and the first screw rod (103) is installed at the corresponding position of each optical lens. Specifically, adhesive is applied to the portion of one end of the first screw rod (103) located in the circular groove (110), and one first screw rod (103) of each optical lens is first installed in the corresponding lower threaded hole (1011) so that the end face of the other end is flush with the outer wall of the stacked lens barrel (101), and then the remaining first screw rods (103) are installed and tightened. After the adhesive is cured, the telescopic rod (2052) is shortened and the lens assembly is removed from the assembly mounting frame.

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