A lightweight short-wave infrared lens with a large relative aperture

Abstract

The application relates to the technical field of short-wave infrared lens, and provides a lightweight short-wave infrared lens with a large relative aperture, which comprises a main lens barrel and a front lens barrel; the main lens barrel comprises a front lens barrel, a rear lens barrel, a lens cover, a mounting structure, an adjusting structure and a connecting structure; the front lens barrel is arranged at one end of the main lens barrel; and the end, away from the main lens barrel, of the front lens barrel is provided with the rear lens barrel. The connecting structure is arranged, the first outer thread and the second outer thread are respectively connected with the inner thread in a threaded mode, the front lens barrel is connected and fixed with the main lens barrel and the rear lens barrel, the first elastic sheet and the second elastic sheet are rotated to drive the first clamping block and the second clamping block to be clamped into the inner part of the clamping groove, the main lens barrel, the front lens barrel and the rear lens barrel are connected in a threaded mode and then in a clamping mode, and therefore the connecting strength between the main lens barrel, the front lens barrel and the rear lens barrel is improved, and the main lens barrel, the front lens barrel and the rear lens barrel are not prone to falling off.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of short-wave infrared lens, in particular to a large relative aperture lightweight short-wave infrared lens. BACKGROUND

[0002] The short-wave infrared lens is an optical device specially designed for capturing short-wave infrared light, usually working in the wavelength range of 0.9 to 1.7 microns. Such lenses are widely used in night surveillance, medical diagnosis, environmental monitoring and scientific research, etc. A large relative aperture lightweight short-wave infrared lens is a special designed optical device, mainly used for capturing short-wave infrared light, with large aperture and lightweight and portable characteristics.

[0003] The existing short-wave infrared lens is assembled by threaded connection during use, and the threaded connection is not firm after long-term use, so that the lens barrels are easy to fall off, and it is not convenient to strengthen the fixation between the lens barrels, and it is not convenient to protect the lens during use, and dust is easy to adhere to the lens, resulting in unclear imaging. SUMMARY

[0004] The purpose of the present application is to provide a large relative aperture lightweight short-wave infrared lens to solve the problem of inconvenient connection of the existing short-wave infrared lens.

[0005] In order to solve the above technical problems, the present application provides the following technical scheme: a large relative aperture lightweight short-wave infrared lens, comprising a main lens barrel and a front lens barrel;

[0006] The main lens barrel comprises a front lens barrel, a rear lens barrel, a lens cover, a mounting structure, an adjusting structure and a connecting structure, the front lens barrel is arranged at one end of the main lens barrel, and the end of the front lens barrel away from the main lens barrel is provided with the rear lens barrel;

[0007] The end of the main lens barrel away from the front lens barrel is provided with the lens cover, and the end of the lens cover is provided with the mounting structure.

[0008] The inside of the main lens barrel, the front lens barrel and the rear lens barrel is provided with the adjusting structure, and the two ends of the front lens barrel are provided with the connecting structure.

[0009] Preferably, the mounting structure comprises a hinged seat, a hinged rod, an insertion block, an insertion slot, an internal slot, an extension spring, a moving block, an embedded block, an embedded slot, a sliding slot, a sliding rod and a soft pad, the hinged seat is arranged at the edge of one end of the lens cover, the hinged seat is internally provided with a hinged rod, one end of the hinged rod is fixedly provided with an insertion block, the outer side of the internal insertion block of the main lens barrel is provided with an insertion slot, one side of the internal insertion slot of the main lens barrel is provided with an internal slot, one side of the internal slot is fixedly provided with an extension spring, one end of the extension spring is fixedly provided with a moving block, one side of the moving block is fixedly provided with an embedded block, the outer side of the internal embedded block of the insertion block is provided with an embedded slot, the top end of the internal slot is provided with a sliding slot, the internal sliding slot is provided with a sliding rod, and one end of the lens cover in the main lens barrel is provided with a soft pad.

[0010] Preferably, the hinged seat is provided with four groups, the hinged seats are equidistantly distributed at the edge of one end of the lens cover, the hinged rod is arranged in an "L" shape, the insertion block and the insertion slot are snap-connected, and the moving block and the internal slot are connected through the extension spring to form an extension structure.

[0011] Preferably, the embedded block and the embedded slot are snap-connected, one side of the embedded block is arranged in an inclined surface, the internal sliding slot is communicated with the internal slot, the bottom end of the sliding rod extends into the internal slot and is fixedly connected with the top end of the moving block, and the soft pad is made of sponge material.

[0012] Preferably, the adjusting structure comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, an annular slot, a threaded rod, a guide rod, a focusing sliding block and a rotating block, the first lens is arranged in the main lens barrel, the main lens barrel is internally provided with the second lens, one side of the second lens is provided with the third lens, the rear lens barrel is internally provided with the fourth lens, one side of the fourth lens is provided with the fifth lens, the main lens barrel is internally provided with an annular slot, one side of the internal annular slot is provided with a threaded rod, the other side of the internal annular slot is provided with a guide rod, the outer sides of the threaded rod and the guide rod in the internal annular slot are provided with a focusing sliding block, and one end of the threaded rod is fixedly provided with a rotating block.

[0013] Preferably, the third lens and the fourth lens are symmetrically distributed in the front lens barrel and the rear lens barrel, one side of the third lens abuts against one side of the fourth lens, the diameter of the first lens is larger than the diameters of the second lens, the third lens, the fourth lens and the fifth lens, and the diameters of the second lens, the third lens, the fourth lens and the fifth lens are the same.

[0014] Preferably, the outer side of the focusing slider internal threaded rod is provided with internal threads, one side of the focusing slider interior is in threaded connection with the outer side of the threaded rod, the threaded rod and the guide rod are symmetrically distributed inside the annular groove, one end of the threaded rod is movably connected with one side inside the annular groove, the other end of the threaded rod extends through the inside of the main lens barrel to the outside of the main lens barrel and is fixedly connected with one end of the rotating block, the focusing slider is annularly arranged, and the inner side of the focusing slider is fixedly connected with the outer side of the first lens.

[0015] Preferably, the connecting structure comprises internal threads, a first external thread, a second external thread, a first elastic sheet, a first clamping block, a second elastic sheet, a second clamping block and a clamping groove, the internal threads are arranged at both ends of the inside of the front lens barrel, the outer side of one end of the main lens barrel is provided with the first external thread, the outer side of one end of the rear lens barrel is provided with the second external thread, the outer side of one end of the rear lens barrel is uniformly provided with the first elastic sheet, one end of the first elastic sheet is fixedly provided with the first clamping block, the edge position of one end of the main lens barrel is provided with the second elastic sheet, one end of the second elastic sheet is fixedly provided with the second clamping block, and the outer sides of the first clamping block and the second clamping block in the inside of the front lens barrel are provided with the clamping groove.

[0016] Preferably, the main lens barrel and the front lens barrel are in threaded connection through the internal threads and the first external thread, the rear lens barrel and the front lens barrel are in threaded connection through the internal threads and the second external thread, the first elastic sheet is arranged in an L shape, a plurality of groups of the first elastic sheet are arranged, and the first elastic sheets are equidistantly distributed on the outer side of the rear lens barrel.

[0017] Preferably, a plurality of groups of the second elastic sheet are arranged, the second elastic sheets are equidistantly distributed at the edge position of one end of the main lens barrel, and the second clamping block and the first clamping block are in clamping structure with the clamping groove.

[0018] The light weight short wave infrared lens with a large relative aperture has the advantages that:

[0019] By arranging the mounting structure, rotating the hinge rod in the inside of the hinge seat, driving the insertion block to be inserted into the inside of the insertion slot, exerting a force on the inclined surface of the embedded block in the process of inserting the insertion block, driving the embedded block to move the moving block in the inside of the built-in slot, compressing the telescopic spring, and driving the embedded block to be clamped into the inside of the embedded slot to form the clamping structure under the elastic force of the telescopic spring when the insertion block is completely clamped into the inside of the insertion slot, the lens cover can be conveniently mounted, dust falling on the first lens is prevented, and the soft pad is made of sponge material, thereby protecting the first lens.

[0020] By setting the adjusting structure, the rotating block is rotated to drive the threaded rod to rotate, and then the threaded rod drives the focusing slider to move outside the threaded rod and the guide rod under the action of the thread, the movement of the focusing slider drives the movement of the first lens, and then the distance between the first lens and the second lens is adjusted to realize the focusing function;

[0021] By setting the connecting structure, the inner thread is respectively connected with the first outer thread and the second outer thread to form a threaded connection, and then the front lens barrel is connected and fixed with the main lens barrel and the rear lens barrel, and the first elastic sheet and the second elastic sheet are driven to make the first elastic sheet and the second elastic sheet drive the first clamping block and the second clamping block to be clamped into the inside of the clamping groove, and then the main lens barrel, the front lens barrel and the rear lens barrel are connected by screwing and then clamped, thereby strengthening the connection strength between the main lens barrel, the front lens barrel and the rear lens barrel, and preventing them from falling off. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a three-dimensional structure schematic diagram of the application;

[0023] Figure 2 It is a front view cross-sectional structure schematic diagram of the application;

[0024] Figure 3 It is a three-dimensional structure schematic diagram of the application; Figure 2 It is an enlarged structure schematic diagram of A in the application;

[0025] Figure 4 It is a three-dimensional structure schematic diagram of the application; Figure 2 It is an enlarged structure schematic diagram of B in the application;

[0026] Figure 5 It is a three-dimensional structure schematic diagram of the main lens barrel, the front lens barrel and the rear lens barrel of the application

[0027] Figure 6 It is a side view cross-sectional structure schematic diagram of the lens cover of the application.

[0028] The figure mark explanation: 1, main lens barrel; 101, front lens barrel; 102, rear lens barrel; 103, lens cover; 104, mounting structure; 1041, hinged seat; 1042, hinged rod; 1043, plug block; 1044, plug slot; 1045, built-in slot; 1046, telescopic spring; 1047, moving block; 1048, embedded block; 1049, embedded slot; 10410, sliding slot; 10411, sliding rod; 10412, soft pad; 105, adjusting structure; 1051, first lens; 1052, second lens; 1053, third lens; 1054, fourth lens; 1055, fifth lens; 1056, annular groove; 1057, threaded rod; 1058, guide rod; 1059, focusing slider; 1050, rotating block; 106, connecting structure; 1061, internal thread; 1062, first external thread; 1063, second external thread; 1064, first elastic sheet; 1065, first clamping block; 1066, second elastic sheet; 1067, second clamping block; 1068, clamping slot. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0030] Please refer to Figures 1-5 The present application provides a lightweight short-wave infrared lens with large relative aperture, which comprises a main lens barrel 1 and a front lens barrel 101.

[0031] Refer to Figure 2 , Figure 3 and Figure 6As shown, the main lens barrel 1 comprises a front lens barrel 101, a rear lens barrel 102, a lens cover 103, a mounting structure 104, an adjusting structure 105, and a connecting structure 106. The front lens barrel 101 is arranged at one end of the main lens barrel 1. The rear lens barrel 102 is arranged away from one end of the main lens barrel 1. The lens cover 103 is arranged away from the front lens barrel 101 of the main lens barrel 1. One end of the lens cover 103 is provided with the mounting structure 104. The mounting structure 104 comprises a hinged seat 1041, a hinged rod 1042, an insertion block 1043, an insertion slot 1044, an internal slot 1045, an extension spring 1046, a moving block 1047, an embedded block 1048, an embedded slot 1049, a sliding slot 10410, a sliding rod 10411, and a soft pad 10412. The hinged seat 1041 is arranged at the edge of one end of the lens cover 103. The hinged seat 1041 is internally provided with the hinged rod 1042. One end of the hinged rod 1042 is fixedly provided with the insertion block 1043. The outer side of the insertion block 1043 in the main lens barrel 1 is provided with the insertion slot 1044. One side of the insertion slot 1044 in the main lens barrel 1 is provided with the internal slot 1045. One side of the internal slot 1045 is internally fixedly provided with the extension spring 1046. One end of the extension spring 1046 is fixedly provided with the moving block 1047. One side of the moving block 1047 is fixedly provided with the embedded block 1048. The outer side of the embedded block 1048 in the insertion block 1043 is provided with the embedded slot 1049. The top end of the internal slot 1045 is provided with the sliding slot 10410. The sliding slot 10410 is internally provided with the sliding rod 10411. One end of the lens cover 103 in the main lens barrel 1 is provided with the soft pad 10412. The hinged seat 1041 is provided with four groups. The hinged seats 1041 are equidistantly distributed at the edge of one end of the lens cover 103. The hinged rod 1042 is arranged in an "L" shape. The insertion block 1043 and the insertion slot 1044 are in snap-fit connection. The moving block 1047 and the internal slot 1045 are in extension structure through the extension spring 1046. The embedded block 1048 and the embedded slot 1049 are in snap-fit connection. One side of the embedded block 1048 is arranged in an inclined surface. The inner side of the sliding slot 10410 is in communication with the inner side of the internal slot 1045. The bottom end of the sliding rod 10411 extends into the inner side of the internal slot 1045 and is fixedly connected with the top end of the moving block 1047. The soft pad 10412 is made of sponge material.

[0032] By rotating the articulated rod 1042 inside the articulated seat 1041, the articulated rod 1042 drives the insertion block 1043 to insert into the insertion slot 1044, and in the process of inserting the insertion block 1043, an acting force is applied to the inclined surface of the embedded block 1048, thereby pushing the embedded block 1048 to drive the moving block 1047 to move inside the built-in slot 1045, so that the telescopic spring 1046 is compressed. When the insertion block 1043 is completely inserted into the insertion slot 1044, the acting force of the insertion block 1043 on the embedded block 1048 disappears, and then the embedded block 1048 is clamped into the embedded slot 1049 under the elastic force of the telescopic spring 1046 to form a clamping structure, thereby facilitating the installation of the lens cover 103, preventing dust from falling on the first lens 1051, and at the same time, the soft pad 10412 is made of sponge material, thereby protecting the first lens 1051.

[0033] With reference to Figure 2As shown, the inside of the main lens barrel 1, the front lens barrel 101 and the rear lens barrel 102 is provided with an adjusting structure 105, which comprises a first lens 1051, a second lens 1052, a third lens 1053, a fourth lens 1054, a fifth lens 1055, an annular groove 1056, a threaded rod 1057, a guide rod 1058, a focusing sliding block 1059 and a rotating block 1050, the first lens 1051 is arranged in the inside of the main lens barrel 1, the inside of the main lens barrel 1 is provided with the second lens 1052, one side of the second lens 1052 is provided with the third lens 1053, the inside of the rear lens barrel 102 is provided with the fourth lens 1054, one side of the fourth lens 1054 is provided with the fifth lens 1055, the inside of the main lens barrel 1 is provided with the annular groove 1056, one side of the inside of the annular groove 1056 is provided with the threaded rod 1057, the other side of the inside of the annular groove 1056 is provided with the guide rod 1058, the outside of the threaded rod 1057 and the guide rod 1058 in the inside of the annular groove 1056 is provided with the focusing sliding block 1059, one end of the threaded rod 1057 is fixedly connected with the rotating block 1050, the third lens 1053 and the fourth lens 1054 are symmetrically distributed in the inside of the front lens barrel 101 and the rear lens barrel 102, one side of the third lens 1053 abuts against one side of the fourth lens 1054, the diameter of the first lens 1051 is larger than that of the second lens 1052, the third lens 1053, the fourth lens 1054 and the fifth lens 1055, the diameters of the second lens 1052, the third lens 1053, the fourth lens 1054 and the fifth lens 1055 are the same, the outside of the threaded rod 1057 in the inside of the focusing sliding block 1059 is provided with an internal thread, one side of the inside of the focusing sliding block 1059 is threadedly connected with the outside of the threaded rod 1057, the threaded rod 1057 and the guide rod 1058 are symmetrically distributed in the inside of the annular groove 1056, one end of the threaded rod 1057 is movably connected with one side of the inside of the annular groove 1056, the other end of the threaded rod 1057 extends through the inside of the main lens barrel 1 to the outside of the main lens barrel 1 and is fixedly connected with one end of the rotating block 1050, the focusing sliding block 1059 is annularly arranged, the inside of the focusing sliding block 1059 is fixedly connected with the outside of the first lens 1051.

[0034] By rotating the rotating block 1050 to drive the threaded rod 1057 to rotate, the focusing sliding block 1059 is driven to move outside the threaded rod 1057 and the guide rod 1058 by the action of the thread, the movement of the focusing sliding block 1059 drives the movement of the first lens 1051, and then the distance between the first lens 1051 and the second lens 1052 is adjusted to realize the focusing function.

[0035] Referring to Figure 1 , Figure 4 and Figure 5As shown, the two ends of the front lens barrel 101 are provided with connecting structures 106, the connecting structures 106 include internal threads 1061, first external threads 1062, second external threads 1063, first elastic sheets 1064, first clamping blocks 1065, second elastic sheets 1066, second clamping blocks 1067 and clamping grooves 1068, the internal threads 1061 are arranged at the two ends inside the front lens barrel 101, the outer side of one end of the main lens barrel 1 is provided with the first external threads 1062, the outer side of one end of the rear lens barrel 102 is provided with the second external threads 1063, the outer side of one end of the rear lens barrel 102 is uniformly provided with the first elastic sheets 1064, one end of the first elastic sheet 1064 is fixed with the first clamping block 1065, the edge position of one end of the main lens barrel 1 is provided with the second elastic sheet 1066, one end of the second elastic sheet 1066 is fixed with the second clamping block 1067, the outer side of the first clamping block 1065 and the second clamping block 1067 inside the front lens barrel 101 are both provided with the clamping groove 1068, the main lens barrel 1 and the front lens barrel 101 are connected through the internal threads 1061 and the first external threads 1062, the rear lens barrel 102 and the front lens barrel 101 are connected through the internal threads 1061 and the second external threads 1063, the first elastic sheet 1064 is arranged in an "L" shape, the first elastic sheet 1064 is provided with a plurality of groups, the first elastic sheet 1064 is distributed at equal intervals on the outer side of the rear lens barrel 102, the second elastic sheet 1066 is provided with a plurality of groups, the second elastic sheet 1066 is distributed at equal intervals at the edge position of one end of the main lens barrel 1, and the second clamping block 1067 and the first clamping block 1065 respectively form a clamping structure with the clamping groove 1068.

[0036] The internal threads 1061 are connected with the first external threads 1062 and the second external threads 1063 respectively to connect and fix the front lens barrel 101 with the main lens barrel 1 and the rear lens barrel 102 respectively, and the first elastic sheet 1064 and the second elastic sheet 1066 are turned to make the first elastic sheet 1064 and the second elastic sheet 1066 drive the first clamping block 1065 and the second clamping block 1067 to be clamped into the inside of the clamping groove 1068 respectively, so that the main lens barrel 1, the front lens barrel 101 and the rear lens barrel 102 are connected through the thread connection and then clamped, thereby strengthening the connection strength between the main lens barrel 1, the front lens barrel 101 and the rear lens barrel 102, and making them not easy to fall off.

[0037] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can make modifications to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to part of the technical features, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A large relative aperture lightweight short-wave infrared lens, comprising a main lens barrel (1) and a front lens barrel (101); Characterized in that: The main lens barrel (1) comprises a front lens barrel (101), a rear lens barrel (102), a lens cover (103), a mounting structure (104), an adjusting structure (105), and a connecting structure (106), the front lens barrel (101) is arranged at one end of the main lens barrel (1), and the front lens barrel (101) is provided with the rear lens barrel (102) away from one end of the main lens barrel (1); The main lens barrel (1) is provided with the lens cover (103) away from one end of the front lens barrel (101), and one end of the lens cover (103) is provided with the mounting structure (104); The inside of the main lens barrel (1), the front lens barrel (101) and the rear lens barrel (102) is provided with an adjusting structure (105), both ends of the front lens barrel (101) are provided with a connecting structure (106); the mounting structure (104) comprises a hinged seat (1041), a hinged rod (1042), an insertion block (1043), an insertion slot (1044), an embedded slot (1045), an extension spring (1046), a moving block (1047), an embedded block (1048), an embedded slot (1049), a sliding slot (10410), a sliding rod (10411) and a soft pad (10412), the hinged seat (1041) is arranged at the edge position of one end of the lens cover (103), the inside of the hinged seat (1041) is provided with the hinged rod (1042), one end of the hinged rod (1042) is fixedly connected with the insertion block (1043), the outside of the insertion block (1043) in the main lens barrel (1) is provided with the insertion slot (1044), one side of the insertion slot (1044) in the main lens barrel (1) is provided with the embedded slot (1045), one side of the inside of the embedded slot (1045) is fixedly connected with the extension spring (1046), one end of the extension spring (1046) is fixedly connected with the moving block (1047), one side of the moving block (1047) is fixedly connected with the embedded block (1048), the outside of the embedded block (1048) in the insertion block (1043) is provided with the embedded slot (1049), the top of the embedded slot (1045) is provided with the sliding slot (10410), the inside of the sliding slot (10410) is provided with the sliding rod (10411), one end of the lens cover (103) in the main lens barrel (1) is provided with the soft pad (10412); the hinged seat (1041) is provided with four groups, the hinged seats (1041) are distributed at equal intervals at the edge position of one end of the lens cover (103), the hinged rod (1042) is arranged in an "L" shape, the insertion block (1043) and the insertion slot (1044) are connected in a clamping mode, the moving block (1047) and the embedded slot (1045) are connected in an extension structure through the extension spring (1046).The connecting structure (106) comprises an inner thread (1061), a first outer thread (1062), a second outer thread (1063), a first elastic sheet (1064), a first clamping block (1065), a second elastic sheet (1066), a second clamping block (1067) and a clamping groove (1068), the inner thread (1061) is arranged at both ends inside the front lens barrel (101), the outer side of one end of the main lens barrel (1) is provided with the first outer thread (1062), the outer side of one end of the rear lens barrel (102) is provided with the second outer thread (1063), the outer side of one end of the rear lens barrel (102) is uniformly provided with the first elastic sheet (1064), one end of the first elastic sheet (1064) is fixed with the first clamping block (1065), the edge position of one end of the main lens barrel (1) is provided with the second elastic sheet (1066), one end of the second elastic sheet (1066) is fixed with the second clamping block (1067), the outer side of the first clamping block (1065) and the second clamping block (1067) inside the front lens barrel (101) is provided with the clamping groove (1068); the main lens barrel (1) and the front lens barrel (101) are connected in a threaded manner through the inner thread (1061) and the first outer thread (1062), the rear lens barrel (102) and the front lens barrel (101) are connected in a threaded manner through the inner thread (1061) and the second outer thread (1063), the first elastic sheet (1064) is arranged in an L shape, the first elastic sheet (1064) is provided with a plurality of groups, and the first elastic sheet (1064) is distributed at equal intervals outside the rear lens barrel (102).

2. The lightweight short-wave infrared lens with large relative aperture according to claim 1, characterized in that: The embedded block (1048) and the embedded groove (1049) are in clamping connection, one side of the embedded block (1048) is arranged in an inclined manner, the inside of the sliding groove (10410) is in communication with the inside of the built-in groove (1045), the bottom end of the sliding rod (10411) extends into the inside of the built-in groove (1045) and is fixedly connected with the top end of the moving block (1047), and the soft pad (10412) is made of sponge material.

3. The lightweight short-wave infrared lens with large relative aperture of claim 1, wherein: The adjusting structure (105) comprises a first lens (1051), a second lens (1052), a third lens (1053), a fourth lens (1054), a fifth lens (1055), an annular groove (1056), a threaded rod (1057), a guide rod (1058), a focusing sliding block (1059), and a rotating block (1050), the first lens (1051) is arranged in the inside of the main lens barrel (1), the inside of the main lens barrel (1) is provided with the second lens (1052), one side of the second lens (1052) is provided with the third lens (1053), the inside of the rear lens barrel (102) is provided with the fourth lens (1054), one side of the fourth lens (1054) is provided with the fifth lens (1055), the inside of the main lens barrel (1) is provided with the annular groove (1056), one side of the inside of the annular groove (1056) is provided with the threaded rod (1057), the other side of the inside of the annular groove (1056) is provided with the guide rod (1058), the outside of the threaded rod (1057) and the guide rod (1058) in the inside of the annular groove (1056) is provided with the focusing sliding block (1059), and one end of the threaded rod (1057) is fixedly connected with the rotating block (1050).

4. The lightweight short-wave infrared lens with large relative aperture according to claim 3, characterized in that: The third lens (1053) and the fourth lens (1054) are symmetrically distributed in the inside of the front lens barrel (101) and the rear lens barrel (102), one side of the third lens (1053) abuts against one side of the fourth lens (1054), the diameter of the first lens (1051) is larger than the diameters of the second lens (1052), the third lens (1053), the fourth lens (1054), and the fifth lens (1055), and the diameters of the second lens (1052), the third lens (1053), the fourth lens (1054), and the fifth lens (1055) are the same.

5. The lightweight short-wave infrared lens with large relative aperture according to claim 4, characterized in that: The outer side of the screw rod (1057) is provided with internal threads, one side of the inside of the focusing slider (1059) is in threaded connection with the outer side of the screw rod (1057), the screw rod (1057) and the guide rod (1058) are symmetrically distributed inside the annular groove (1056), one end of the screw rod (1057) is movably connected with one side inside the annular groove (1056), the other end of the screw rod (1057) extends through the inside of the main mirror barrel (1) to the outside of the main mirror barrel (1) and is fixedly connected with one end of the rotating block (1050), the focusing slider (1059) is annularly arranged, and the inner side of the focusing slider (1059) is fixedly connected with the outer side of the first lens (1051).

6. The lightweight short-wave infrared lens with large relative aperture of claim 1, wherein: The second elastic sheet (1066) is provided in several groups, the second elastic sheet (1066) is equally spaced at the edge position of one end of the main mirror barrel (1), and the second clamping block (1067) and the first clamping block (1065) respectively constitute a clamping structure with the clamping groove (1068).

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