Four-eye night vision device assembly
By optimizing the objective lens group and lens body structure of the four-eye night vision goggles, adopting the design of sliding connection and threaded connection, and combining with a specific lens combination, the problems of heavy weight and difficult adjustment of the four-eye night vision goggles are solved, and a compact, lightweight and low-cost night vision goggles component is achieved.
Patent Information
- Application Number
- CN202423029488.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Existing four-eye night vision devices are heavy and bulky, have complex optical systems, are difficult to process and adjust components, and are relatively expensive.
The specific structure of the objective lens group and lens body design, including the sliding connection objective lens mount, the threaded connection objective lens pressure ring and the focusing handwheel, combined with the optical focal length distribution of seven lenses and the cemented lens design, simplifies the connection structure and optimizes the aberration, reducing the number and weight of lenses.
The four-eye night vision device has a compact structure, light weight, simple debugging, low cost, good imaging quality and convenient optical adjustment.
Smart Images
Figure CN223389983U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of night vision devices, in particular to a four-eye night vision device component with compact structure, low weight, simple debugging and low cost. Background Art
[0002] A night vision device is a night-time external sight with an image intensifier as its core component. It does not use infrared detection lights to illuminate the target, but instead uses natural night sky lights such as weak moonlight, starlight, atmospheric glow, and Milky Way light for illumination. The light reflected from the target is amplified by the image intensifier and converted into a visible image to observe and aim at the target.
[0003] With the advancement of technology, night vision goggles have gradually evolved from the original monocular to the modern quadrilateral. Among them, monocular night vision goggles use one image intensifier and one objective lens and eyepiece, making them simple, portable and low-cost. However, due to their limited field of view and depth perception, they are currently commonly used for casual observation, reconnaissance and simple navigation. Binocular night vision goggles use two image intensifiers and two objective lenses and eyepieces to provide each eye with an independent field of view, so observation is more natural and depth perception is more accurate. Although the field of view is still subject to certain limitations, they are currently popular in outdoor adventures, long-term observations and certain professional tasks. Quadrilateral night vision goggles, because they integrate four sets of monocular night vision goggles, can provide a 120-degree observation field of view that is basically equivalent to the natural field of view of the human eye, thus avoiding the problem of limited field of view of monocular and binocular lenses in the past. Therefore, they are gradually being used in search and rescue and special operations.
[0004] Since a four-eye night vision device integrates four sets of monocular night vision devices, it is necessary to improve the design to reduce weight and reduce the burden on users. However, existing four-eye night vision devices are merely a simple integration of the individual monocular night vision devices, with more emphasis on optimizing and improving the image stitching quality. Some also use lightweight materials and integrated structures to reduce weight. Although this can reduce the overall weight, the optical system mostly still uses a traditional design. This not only results in a large number of lenses and a large lens volume, causing the optical system to occupy a large proportion of the overall weight, but also makes the four-eye night vision device larger and more difficult to correct various aberrations. Moreover, the integrated structural design, while simplifying the overall structure, makes the initial component processing difficult, and later optical adjustment and maintenance difficult. In addition, the objective lens of existing four-eye night vision devices often uses a conventional structural design. Although the component processing is simple and low-cost, it results in a large number of components, resulting in a complex structure, difficulty in weight reduction, difficulty in adjustment, and difficulty in effectively controlling error accumulation. Utility Model Content
[0005] In view of the deficiencies in the prior art, the utility model provides a four-eye night vision device assembly with compact structure, low weight, simple debugging and low cost.
[0006] The utility model is implemented as follows: it comprises an objective lens, a lens body, and an eyepiece that are fixedly connected in sequence along an optical path from the object side to the image side, the lens body comprising a V-shaped main lens frame, the main lens frame having two built-in image intensifiers, the main lens frame being provided with a circuit board between the two image intensifiers, the object side of the lens body being detachably fixed with two objective lenses, the image side of the lens body being detachably provided with an eyepiece frame, two sets of eyepiece lens groups being provided in the eyepiece frame, and an eyepiece ferrule being fixed to an end of the eyepiece frame away from the lens body;
[0007] The objective lens includes an objective lens seat that slides and extends into the main lens frame and abuts the image intensifier, an objective lens group that is threadedly connected from the object side and extends into the objective lens seat, an objective lens pressure ring that is threadedly connected and extends into the main lens frame and abuts the objective lens seat, and a focusing handwheel fixedly sleeved on the objective lens group. A flange is provided on the image side of the objective lens seat, and the image side of the objective lens pressure ring abuts the flange with a sealing ring I provided therebetween.
[0008] Furthermore, the objective lens group includes an objective lens barrel, an objective lens group, a front pressure ring detachably fixedly arranged on the object side of the objective lens barrel and abutting against the objective lens group, a lens frame for fixing the objective lens, and objective lens spacers I, II, and III for separating the objective lenses;
[0009] The objective lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, which are sequentially arranged along the optical path from the object side to the image side. The objective lens barrel is a four-step hollow shaft with a diameter decreasing sequentially from the object side to the image side. The second lens, the third lens and the fourth lens constitute a first cemented lens, and the fifth lens and the sixth lens constitute a second cemented lens. The second cemented lens is fixedly sleeved in the lens frame and is arranged in the second step hole on the image side of the objective lens barrel through the objective lens spacer III. The first cemented lens is slidably arranged in the second step hole on the object side of the objective lens barrel and abuts against the lens frame through the objective lens spacer II. The first lens is slidably arranged in the first step hole on the object side of the objective lens barrel and abuts against the first cemented lens through the objective lens spacer I. The image side of the front pressure ring abuts against the first lens.
[0010] Furthermore, the first lens, the second lens and the fifth lens are all meniscus lenses with a convex object side surface, the third lens and the sixth lens are all biconvex lenses, the fourth lens is a biconcave lens, and the seventh lens is a single concave lens with a concave object side surface and a flat image side surface.
[0011] Furthermore, the first lens is a positive refractive power objective lens, the first cemented lens is a negative refractive power objective lens, the second cemented lens is a positive refractive power objective lens, and the seventh lens is a negative refractive power objective lens.
[0012] Furthermore, the objective lens mount is a two-step hollow shaft with a diameter decreasing from the object side to the image side, the flange is coaxially fixed on the image side end face of the objective lens mount, the image side step outer cylindrical surface of the objective lens barrel is threadedly connected and extends into the image side step hole of the objective lens mount, one of the step outer cylindrical surfaces of the objective lens barrel movably extends into the object side step hole of the objective lens mount and a sealing ring II is sleeved on the step outer cylindrical surface.
[0013] Furthermore, a threaded hole I is provided at the object side opening of the objective lens barrel, the front pressure ring is threadedly connected and embedded in the threaded hole I of the objective lens barrel and abuts the first lens, a sealing ring III is provided between the front pressure ring and the first lens, and a decorative ring is also provided on the outer circular surface of the object side of the objective lens barrel.
[0014] Furthermore, the image side sliding sleeve of the focusing handwheel is provided with a retaining ring group, and the retaining ring group includes a retaining ring with an opening on one side, a screw I connecting the two sides of the retaining ring opening, and a guide pin vertically fixed on the image side of the retaining ring. The retaining ring sliding sleeve is provided on the focusing handwheel, and a guide hole is correspondingly provided on the object side of the objective lens pressure ring, and the guide pin slides and extends into the guide hole of the objective lens pressure ring.
[0015] Furthermore, a dovetail groove is provided in the middle of the upper part of the main lens frame and connecting cavities for connecting to the image intensifiers are provided on both sides of the interior. Card slots are correspondingly provided on the upper wall and lower wall between the two connecting cavities inside the main lens frame. The circuit board is vertically arranged and the upper and lower ends are clamped in the card slots on the upper wall and lower wall of the main lens frame. The circuit board is electrically connected to the two image intensifiers respectively.
[0016] Furthermore, an electrical contact is provided on the outer diameter of the image intensifier, and electrical springs are provided on both sides of the circuit board respectively. The electrical contacts of the two image intensifiers in the main lens frame abut against the corresponding electrical springs of the circuit board.
[0017] Beneficial effects of the utility model:
[0018] 1. The utility model simplifies the connection between the objective lens and the main lens frame by placing the objective lens pressure ring of the objective lens against the flange of the objective lens seat, and the objective lens pressure ring is threadedly connected to the main lens frame, and the objective lens group is threadedly connected to the objective lens seat, thereby simplifying the connection between the objective lens and the main lens frame, and effectively simplifying the connection structure to reduce weight and volume while ensuring connection reliability, and also facilitating adjustment of the focal length of the objective lens.
[0019] 2. The objective lens seat of the present invention slides and extends into the main lens frame and abuts the image intensifier, and the objective lens group is threadedly connected from the object side to the objective lens seat. A threaded objective lens pressure ring is provided, which extends into the main lens frame and abuts the objective lens seat, and a focusing hand wheel is fixedly mounted on the objective lens group. Therefore, the objective lens group can be moved axially in the objective lens seat by the focusing hand wheel to achieve zooming, and the focusing structure is effectively simplified.
[0020] 3. The objective lens assembly of the present invention adopts seven lenses with a specific structure arranged in sequence from the object side to the image side. Through the specific optical power distribution and combination of the seven lenses, not only can the spherical aberration, field curvature, distortion, chromatic aberration and secondary spectral chromatic aberration of the objective optical system be optimized, but also the weight and size of the objective lens can be reduced, thereby ensuring that the night vision device has good aberration, compact structure and low weight.
[0021] 4. The present invention significantly shortens the size of the objective lens group and reduces the number of spacers to reduce the overall weight by combining the second, third, and fourth lenses of the objective lens group into a first cemented lens, and combining the fifth and sixth lenses into a second cemented lens. Furthermore, the optical adjustment workload and the chromatic aberration correction of the objective lens group can be reduced.
[0022] 5. The utility model has corresponding card slots on the upper wall and the lower wall between the two connecting cavities inside the main lens frame, so that the circuit board can be carded into the card slots on the upper wall and the lower wall of the main lens frame, and the image intensifiers on both sides of the circuit board are electrically connected. This not only makes full use of the main frame space to reduce the volume of the main lens body, but also ensures reliable electrical connection and convenient installation and adjustment.
[0023] In summary, the utility model has the characteristics of compact structure, low weight, simple debugging and low cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0025] Figure 2 for Figure 1 Exploded view of;
[0026] Figure 3 for Figure 1 sectional view of
[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the objective lens assembly and the objective lens base of the present utility model;
[0028] Figure 5 for Figure 4 sectional view of
[0029] Figure 6 This is a schematic diagram of the three-dimensional structure of the objective lens pressure ring of the present utility model;
[0030] Figure 7 This is a schematic diagram of the three-dimensional structure of the main mirror frame of the present utility model;
[0031] In the figure: 100-objective lens, 110-objective lens seat, 111-flange, 120-objective lens group, 121-objective lens barrel, 122-objective lens group, 122A-first lens, 122B-second lens, 122C-third lens, 122D-fourth lens, 122E-fifth lens, 122F-sixth lens, 122G-seventh lens, 123-front pressure ring, 124-lens frame, 125-objective lens spacer I, 126-objective lens spacer II, 127-objective lens spacer III, 13 0-objective lens pressure ring, 140-focusing handwheel, 150-sealing ring I, 160-decorative ring, 170-sealing ring II, 180-sealing ring III, 190-retaining ring group, 191-retaining ring, 192-screw I, 193-guide pin, 200-mirror body, 210-main mirror frame, 211-dovetail groove, 212-connecting cavity, 213-card slot, 220-image intensifier, 230-circuit board, 300-eyepiece, 310-eyepiece frame, 320-eyepiece lens group, 330-eyepiece card holder. DETAILED DESCRIPTION
[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0033] like Figures 1 to 7 As shown, the present invention includes an objective lens 100, a lens body 200, and an eyepiece 300 that are fixedly connected in sequence along the optical path from the object side to the image side. The lens body 200 includes a main lens frame 210 with a V-shaped structure. The main lens frame 210 has two built-in image intensifiers 220. The main lens frame 210 is provided with a circuit board 230 between the two image intensifiers 220. The object side of the lens body 200 is detachably fixed with two objective lenses 100. The image side of the lens body 200 is detachably provided with an eyepiece frame 310. Two sets of eyepiece lens groups 320 are provided in the eyepiece frame 310. An eyepiece ferrule 330 is fixed to the end of the eyepiece frame 310 away from the lens body 200.
[0034] The objective lens 100 includes an objective lens mount 110 that slides and extends into the main lens frame 210 and abuts the image intensifier 220, an objective lens group 120 that is threadedly connected from the object side and extends into the objective lens mount 110, an objective lens pressure ring 130 that is threaded and extends into the main lens frame 210 and abuts the objective lens mount 110, and a focusing hand wheel 140 fixedly mounted on the objective lens group 120. A flange 111 is provided on the image side of the objective lens mount 110, and the image side of the objective lens pressure ring 130 abuts the flange 111 with a sealing ring I 150 provided therebetween.
[0035] The objective lens assembly 120 includes an objective lens barrel 121, an objective lens assembly 122, a front pressure ring 123 detachably fixedly arranged on the object side of the objective lens barrel 121 and abutting against the objective lens assembly 122, a lens frame 124 for fixing the objective lens, and objective lens spacers I 125, II 126, and III 127 for separating the objective lenses.
[0036] The objective lens group 122 is provided with a first lens 122A, a second lens 122B, a third lens 122C, a fourth lens 122D, a fifth lens 122E, a sixth lens 122F, and a seventh lens 122G, which are arranged in sequence along the optical path from the object side to the image side. The objective lens barrel 121 is a four-step hollow shaft with a diameter decreasing from the object side to the image side. The second lens 122B, the third lens 122C, and the fourth lens 122D form a first cemented lens, and the fifth lens 122E and the sixth lens 122F form a second cemented lens. The second cemented lens is fixedly mounted in the lens frame 124 and is arranged in the second step hole on the image side of the objective lens barrel 121 through the objective lens spacer III 127. The first cemented lens is slidably arranged in the second step hole on the object side of the objective lens barrel 121 and is abutted against the lens frame 124 through the objective lens spacer II 126. The first lens 122A is slidably arranged in the first step hole on the object side of the objective lens barrel 121 and is abutted against the first cemented lens through the objective lens spacer I 125. The image side of the front pressure ring 123 abuts against the first lens 122A.
[0037] The first lens 122A, the second lens 122B, and the fifth lens 122E are all meniscus lenses with a convex object-side surface. The third lens 122C and the sixth lens 122F are both biconvex lenses. The fourth lens 122D is a biconcave lens. The seventh lens 122G is a single concave lens with a concave object-side surface and a flat image-side surface. The first lens 122A is a meniscus lens with a convex object-side surface, which can adjust the incident light input to the objective lens assembly 122 and reduce the size of the objective lens assembly 122 while maintaining the field of view. Meanwhile, the seventh lens 122G is a single concave lens with a concave object-side surface and a flat image-side surface, which can adjust the incident light output from the objective lens assembly 122 to improve imaging quality. The flat image-side surface can also prevent collision with the image intensifier 220 during focusing, thereby improving safety.
[0038] The first lens 122A is a positive refractive power objective lens, the first cemented lens is a negative refractive power objective lens, the second cemented lens is a positive refractive power objective lens, and the seventh lens 122G is a negative refractive power objective lens.
[0039] The objective lens mount 110 is a two-step hollow shaft with a diameter decreasing from the object side to the image side. The flange 111 is coaxially fixed on the image side end face of the objective lens mount 110. The image side step outer circumferential surface of the objective lens barrel 121 is threadedly connected and extends into the image side step hole of the objective lens mount 110. One of the step outer circumferential surfaces of the objective lens barrel 121 is movably extended into the object side step hole of the objective lens mount 110 and a sealing ring II 170 is sleeved on the step outer circumferential surface.
[0040] The object side opening of the objective lens barrel 121 is provided with a threaded hole I, the front pressure ring 123 is threadedly connected and embedded in the threaded hole I of the objective lens barrel 121 and abuts the first lens 122A, a sealing ring III 180 is provided between the front pressure ring 123 and the first lens 122A, and a decorative ring 160 is also sleeved on the outer circular surface of the object side of the objective lens barrel 121.
[0041] The image side sliding sleeve of the focusing hand wheel 140 is provided with a retaining ring group 190, and the retaining ring group 190 includes a retaining ring 191 with an opening on one side, a screw I 192 connecting the two sides of the opening of the retaining ring 191, and a guide pin 193 vertically fixed on the image side of the retaining ring 191. The retaining ring 191 is slidably sleeved on the focusing hand wheel 140, and a guide hole is correspondingly provided on the object side of the objective lens pressure ring 130, and the guide pin 193 slides and extends into the guide hole of the objective lens pressure ring 130.
[0042] A dovetail groove 211 is provided in the middle of the upper part of the main lens frame 210, and connecting cavities 212 for connecting to the image intensifiers 220 are provided on both sides of the interior. A card slot 213 is correspondingly provided on the upper wall and lower wall between the two connecting cavities 212 inside the main lens frame 210. The circuit board 230 is vertically arranged and the upper and lower ends are clamped in the card slots 213 on the upper wall and lower wall of the main lens frame 210. The circuit board 230 is electrically connected to the two image intensifiers 220 respectively.
[0043] The image intensifier 220 is provided with electrical contacts on its outer diameter, and electrical springs are provided on both sides of the circuit board 230 . The electrical contacts of the two image intensifiers 220 in the main lens frame 210 abut against the corresponding electrical springs of the circuit board 230 .
[0044] The retaining ring 191, main lens frame 210, objective lens barrel 121 and eyepiece lens frame 310 are made of aluminum alloy or glass fiber reinforced nylon, and each spacer and lens frame 124, focusing hand wheel 140, decorative ring 160 and eyepiece ferrule 330 are made of engineering plastic or glass fiber reinforced nylon.
[0045] Each lens in the objective lens assembly 122 is made of lightweight environmentally friendly glass material and coated with an anti-reflection film in the visible light to near infrared band.
[0046] The working principle and working process of this utility model:
[0047] like Figures 1 to 7 As shown, when in use, light enters from the object side of the first lens 122A, is refracted by the first cemented lens, the second cemented lens and the seventh lens 122G in sequence, and enters the image intensifier 220 from the image side of the seventh lens 122G. The image intensifier 220 amplifies the image signal and displays it on the rear side, and finally is received by the human eye through the eyepiece 300.
[0048] When the focal length needs to be adjusted, the focusing hand wheel 140 is rotated to cause the objective lens barrel 121 to rotate within the objective lens mount 110. Since the objective lens mount 110 is fixedly connected to the main lens frame 210 via the objective lens pressure ring 130, the focusing hand wheel 140 and the objective lens barrel 121, together with the objective lens assembly 122 fixed therein, move forward or backward relative to the main lens frame 210, thereby changing the focal length of the incident image intensifier 220 and achieving zooming. During the forward or backward movement of the focusing hand wheel 140, since the retaining ring assembly 190 is slidably disposed on the image side of the focusing hand wheel 140 and is connected to the objective lens pressure ring 130 via the guide pin 193, the focusing hand wheel 140 is blocked by the retaining ring assembly 190 when it approaches the image side, limiting the minimum distance between the objective lens barrel 121 and the image intensifier 220, thereby preventing the objective lens barrel 121 from colliding with the image intensifier 220 during the focusing process.
[0049] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.
Claims
1. A four-eye night vision device assembly, characterized by: The invention comprises an objective lens (100), a lens body (200), and an eyepiece (300) which are fixedly connected in sequence along an optical path from the object side to the image side, the lens body (200) comprising a main lens frame (210) with a V-shaped structure, the main lens frame (210) having two built-in image intensifiers (220), the main lens frame (210) being provided with a circuit board (230) between the two image intensifiers (220), the object side of the lens body (200) being detachably fixed with two objective lenses (100), the image side of the lens body (200) being detachably provided with an eyepiece lens frame (310), two sets of eyepiece lens groups (320) being provided in the eyepiece lens frame (310), and an eyepiece ferrule (330) being fixed to one end of the eyepiece lens frame (310) away from the lens body (200); The objective lens (100) comprises an objective lens seat (110) that slides and extends into the main lens frame (210) and abuts against the image intensifier (220), an objective lens group (120) that is threadedly connected from the object side and extends into the objective lens seat (110), an objective lens pressure ring (130) that is threadedly connected and extends into the main lens frame (210) and abuts against the objective lens seat (110), and a focusing hand wheel (140) fixedly sleeved on the objective lens group (120), wherein the image side of the objective lens seat (110) is provided with a flange (111), and the image side of the objective lens pressure ring (130) abuts against the flange (111), with a sealing ring I (150) provided therebetween.
2. The four-eye night vision device assembly according to claim 1, characterized in that: The objective lens group (120) comprises an objective lens barrel (121), an objective lens group (122), a front pressure ring (123) detachably fixedly arranged on the object side of the objective lens barrel (121) and abutting against the objective lens group (122), a lens frame (124) for fixing the objective lens, and an objective lens spacer I (125), an objective lens spacer II (126), and an objective lens spacer III (127) for separating the objective lenses; The objective lens group (122) comprises a first lens (122A), a second lens (122B), a third lens (122C), a fourth lens (122D), a fifth lens (122E), a sixth lens (122F), and a seventh lens (122G) which are sequentially arranged along the optical path from the object side to the image side. The objective lens barrel (121) is a four-step hollow shaft with a diameter that decreases sequentially from the object side to the image side. The second lens (122B), the third lens (122C), and the fourth lens (122D) form a first cemented lens. The fifth lens (122E) and the sixth lens (122F) form a second cemented lens. The second cemented lens is fixedly sleeved in the lens frame (124) and is arranged in the second step hole on the image side of the objective lens barrel (121) with the seventh lens (122G) through the objective lens spacer ring III (127); the first cemented lens is slidably arranged in the second step hole on the object side of the objective lens barrel (121) and abuts against the lens frame (124) through the objective lens spacer ring II (126); the first lens (122A) is slidably arranged in the first step hole on the object side of the objective lens barrel (121) and abuts against the first cemented lens through the objective lens spacer ring I (125); the image side of the front pressure ring (123) abuts against the first lens (122A).
3. The four-eye night vision device assembly according to claim 2, characterized in that: The first lens (122A), the second lens (122B) and the fifth lens (122E) are all meniscus lenses with a convex surface on the object side, the third lens (122C) and the sixth lens (122F) are all biconvex lenses, the fourth lens (122D) is a biconcave lens, and the seventh lens (122G) is a single concave lens with a concave surface on the object side and a flat surface on the image side.
4. The four-eye night vision device assembly according to claim 3, characterized in that: The first lens (122A) is a positive refractive power objective lens, the first cemented lens is a negative refractive power objective lens, the second cemented lens is a positive refractive power objective lens, and the seventh lens (122G) is a negative refractive power objective lens.
5. The four-eye night vision device assembly according to claim 2, characterized in that: The objective lens mount (110) is a two-step hollow shaft with a diameter decreasing from the object side to the image side. The flange (111) is coaxially fixedly arranged on the image side end surface of the objective lens mount (110). The image side step outer circumferential surface of the objective lens barrel (121) is threadedly connected and extends into the image side step hole of the objective lens mount (110). One of the step outer circumferential surfaces of the objective lens barrel (121) is movably extended into the object side step hole of the objective lens mount (110) and a sealing ring II (170) is sleeved on the step outer circumferential surface.
6. The four-eye night vision device assembly according to claim 2, characterized in that: The object side opening of the objective lens barrel (121) is provided with a threaded hole I, the front pressure ring (123) is threadedly connected and embedded in the threaded hole I of the objective lens barrel (121) and abuts against the first lens (122A), a sealing ring III (180) is provided between the front pressure ring (123) and the first lens (122A), and a decorative ring (160) is also sleeved on the outer circumferential surface of the object side of the objective lens barrel (121).
7. The four-eye night vision device assembly according to claim 2, characterized in that: The image side sliding sleeve of the focusing hand wheel (140) is provided with a retaining ring group (190), the retaining ring group (190) comprises a retaining ring (191) with an opening on one side, a screw I (192) connecting the two sides of the opening of the retaining ring (191), and a guide pin (193) vertically fixed on the image side of the retaining ring (191); the retaining ring (191) sliding sleeve is provided on the focusing hand wheel (140), and a guide hole is correspondingly provided on the object side of the objective lens pressure ring (130), and the guide pin (193) slides and extends into the guide hole of the objective lens pressure ring (130).
8. The four-eye night vision device assembly according to any one of claims 1 to 7, characterized in that: A dovetail groove (211) is provided in the middle of the upper portion of the main lens frame (210), and connecting cavities (212) for connecting to the image intensifiers (220) are provided on both sides of the interior thereof. A card slot (213) is correspondingly provided on the upper wall and the lower wall of the main lens frame (210) between the two connecting cavities (212). The circuit board (230) is vertically arranged, and its upper and lower ends are card slots (213) on the upper wall and the lower wall of the main lens frame (210). The circuit board (230) is electrically connected to the two image intensifiers (220) respectively.
9. The four-eye night vision device assembly according to claim 8, characterized in that: An electrical contact is provided on the outer diameter of the image intensifier (220), electrical springs are provided on both sides of the circuit board (230), and the electrical contacts of the two image intensifiers (220) in the main lens frame (210) abut against the corresponding electrical springs of the circuit board (230).