A hand-adjusting lens with laser ranging function

Abstract

The utility model discloses a manual lens with laser ranging function, include: front casing, rear casing is detachably connected with front casing, lens barrel is built -in in front casing, lens group is built -in in lens barrel, including fixed group and focusing group, focusing unit includes first guide rod, second guide rod and gyro wheel, and first guide rod and second guide rod are connected in screw thread and are located in the hollow chamber of front casing and rear casing composition, and first guide rod is connected in sliding with front casing and rear casing at least one, and second guide rod is connected in rotation with rear casing, and gyro wheel is connected in same axis with second guide rod and protrudes from the outer wall of rear casing, and gyro wheel rotates and drives second guide rod to rotate, thereby drive first guide rod and drive focusing group to move along the optical axis, laser is located between front casing and lens barrel, is used to the light ray of the object side of lens group emission light realizes ranging, imaging module is located the image side of lens group. It is favorable to realize light and small -sized and big stroke focusing, and convenient operation, and waterproof and good anti -impact performance.

Description

Technical Field

[0001] This utility model belongs to the field of optical lens technology, specifically relating to a manually adjustable lens with laser rangefinding function. Background Technology

[0002] Infrared thermal imager sights typically incorporate laser rangefinders for target distance identification during precise shooting. Currently, most infrared thermal imagers use external laser rangefinders, which are separately mounted and fixed to the outer casing of the imager. These are generally bulky and heavy, posing a significant disadvantage for handheld devices. Furthermore, the long baseline distance between the laser rangefinder's optical axis and the lens's optical axis can amplify errors and cause calibration difficulties. In addition, common manual lens focusing mechanisms include full-circle focusing and side-mounted focusing. The full-circle handwheel focusing method suffers from large dimensions of its transmission components, making weight and volume control difficult. Furthermore, it cannot be operated with one hand, resulting in poor ease of use. The side-mounted handwheel focusing method uses a helical or other eccentric curve to move a guide pin fixed to the focusing lens mount, achieving focusing. However, due to the handwheel's size limitations, the helical shape makes it difficult to achieve a large stroke offset, thus limiting the focusing range. Additionally, the handwheel's side mounting position is restricted to near the moving components, preventing arbitrary placement. When focusing is required for handheld observation, the other hand must be used to rotate the side handwheel, further complicating operation. Moreover, none of these solutions simultaneously achieve miniaturization, waterproofing, and impact resistance. Utility Model Content

[0003] The purpose of this invention is to address the above-mentioned problems by proposing a manually adjustable lens with laser rangefinding function, which is conducive to achieving miniaturization and long-stroke focusing, and is easy to operate, waterproof and shock resistant.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model proposes a manually adjustable lens with laser ranging function, comprising: Front housing; The rear housing is detachably connected to the front housing. The lens barrel is built into the front housing; The lens assembly is built into the lens barrel and includes a fixed assembly and a focusing assembly, each having at least one lens. The focusing unit includes a first guide rod, a second guide rod, and a roller. The first guide rod and the second guide rod are threadedly connected and located in the hollow cavity formed by the front housing and the rear housing. The first guide rod is slidably connected to at least one of the front housing and the rear housing, and the second guide rod is rotatably connected to the rear housing. The roller is coaxially connected to the second guide rod and protrudes from the outer wall of the rear housing. When the roller rotates, it drives the second guide rod to rotate, thereby driving the first guide rod to move the focusing group along the optical axis. A laser, located between the front housing and the lens barrel, is used to emit light towards the object side of the lens assembly to achieve distance measurement; The imaging module is located on the image side of the mirror group.

[0005] Preferably, the first guide rod is provided with a first polygonal limiting section, and the rear wall of the front housing is provided with a first polygonal hole. The first polygonal limiting section and the first polygonal hole cooperate to realize the rotational limiting of the first guide rod and the front housing. The second guide rod is provided with a second polygonal limiting section, and the roller is provided with a second polygonal hole. The second polygonal limiting section and the second polygonal hole cooperate to realize the rotational limiting of the second guide rod and the roller.

[0006] Preferably, the inner wall of the rear housing is also connected to a sealing cover, the focusing unit also includes multiple sealing rings, the roller is built into the sealing cover, and the second guide rod passes through the sealing cover and is sealed with the contact surface of the sealing cover by the sealing rings respectively.

[0007] Preferably, the focusing unit further includes a third pressure ring, a guide seat, and a screw. The guide seat is connected to the focusing assembly. The first guide rod passes through the guide seat and is clearance-fitted with the guide seat. The third pressure ring is threadedly connected to the first guide rod to limit the movement of the guide seat. The screw is threadedly connected to the end of the second guide rod away from the first guide rod. The second guide rod is also provided with a limiting ring. The movement of the second guide rod is limited by the limiting ring and the screw abutting against the rear housing.

[0008] Preferably, the lens assembly further includes a lens mount, with the focusing assembly built into the lens mount, and the lens mount and lens barrel are slidably connected via a guide unit.

[0009] Preferably, the lens barrel is detachably connected to the front housing.

[0010] Preferably, the manual adjustment lens with laser rangefinding function further includes a limiting ring, a first pressure ring, a fixing ring, and a second pressure ring. The second pressure ring is connected to the lens mount to clamp the focusing assembly. The limiting ring is connected to the object side end of the front housing to achieve axial limiting of the lens barrel. The first pressure ring and the fixing ring are both built into the lens barrel, and the fixing ring is located between the first pressure ring and the fixing assembly. The first pressure ring is connected to the lens barrel and presses against the fixing ring to clamp the fixing assembly.

[0011] Preferably, the fixing ring has a first window facing the laser, and the first window is fitted with window glass.

[0012] Preferably, at least one of the object side and the image side of the window glass is coated with a film layer, the film layer having a transmittance of less than or equal to 30% in the visible light band and a transmittance of greater than or equal to 93% in the emission band of the laser.

[0013] Preferably, the fixed assembly includes a first lens, the focusing assembly includes a second lens, the first lens, the second lens and the imaging module are arranged sequentially along the optical axis, the laser is also electrically connected to the imaging module, the fixed assembly has a notch to avoid the laser, and the optical axis of the laser is parallel to the optical axis of the lens assembly.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: The focusing unit, laser, and imaging module of this application are all built-in, which not only achieves miniaturization and long-stroke focusing, but also helps to improve waterproof performance and impact resistance. Furthermore, the separate design of the front housing, rear housing, and lens barrel facilitates disassembly and maintenance. Specifically, the second guide rod of the focusing unit is threadedly driven with the first guide rod, resulting in minimal backlash. By limiting the rotation of the first guide rod and the movement of the second guide rod, the rotation of the roller drives the second guide rod to rotate, thereby driving the first guide rod to move the focusing group along the optical axis for focusing. This allows for single-handed focusing, making operation convenient and smooth. Furthermore, the guide rod design of this focusing unit minimizes the number of transmission components while ensuring smooth adjustment, thereby reducing product costs, improving assembly yield, and creating a more compact structure. This facilitates miniaturization and long-stroke focusing. The built-in laser helps reduce the baseline distance between the laser's optical axis and the lens's optical axis, making it easier to ensure baseline accuracy between the two axes. The use of window glass not only protects the laser but also provides more reliable waterproofing and a more aesthetically pleasing design. The integrated laser design reduces overall size and weight, significantly improving portability and ease of operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the manually adjustable lens with laser ranging function of this utility model; Figure 2 This is a cross-sectional view of the manually adjustable lens with laser rangefinding function of this utility model; Figure 3 This utility model Figure 2 A magnified view of a portion of the image; Figure 4 This is an exploded view of the manually adjustable lens with laser rangefinding function of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Front housing; 2. Rear housing; 3. Lens barrel; 4. Lens group; 5. Focusing unit; 6. Imaging module; 7. Laser; 8. Window glass; 9. Limiting ring; 31. First pressure ring; 32. Fixing ring; 33. Second pressure ring; 41. First lens; 42. Second lens; 51. First guide rod; 52. Second guide rod; 53. Roller; 54. Third pressure ring; 55. Guide seat; 56. Screw; 57. Sealing ring. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or there may be an intervening component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application.

[0019] like Figures 1-4 As shown, a manually adjustable lens with laser rangefinding function includes: Front housing 1; The rear housing 2 is detachably connected to the front housing 1; Lens tube 3 is built into the front housing 1; Lens group 4 is built into lens barrel 3 and includes a fixed group and a focusing group, each having at least one lens; The focusing unit 5 includes a first guide rod 51, a second guide rod 52, and a roller 53. The first guide rod 51 and the second guide rod 52 are threadedly connected and located in the hollow cavity formed by the front housing 1 and the rear housing 2. The first guide rod 51 is slidably connected to at least one of the front housing 1 and the rear housing 2. The second guide rod 52 is rotatably connected to the rear housing 2. The roller 53 is coaxially connected to the second guide rod 52 and protrudes from the outer wall of the rear housing 2. When the roller 53 rotates, it drives the second guide rod 52 to rotate, thereby driving the first guide rod 51 to move the focusing group along the optical axis. Laser 7 is located between the front housing 1 and the lens barrel 3, and is used to emit light to the object side of the lens group 4 to achieve distance measurement; Imaging module 6 is located on the image side of mirror group 4.

[0020] The front housing 1, rear housing 2, and lens barrel 3 can be of any shape and are designed for easy disassembly and maintenance. The focusing unit 5, laser 7, and imaging module 6 are all built-in, achieving miniaturization while also improving waterproofing and impact resistance. In the focusing unit 5, the first guide rod 51 is limited and cannot rotate, only moving along the optical axis (front-back direction). The second guide rod 52 is also limited and cannot move along the optical axis, only rotating around a direction parallel to the optical axis. The second guide rod 52 and the first guide rod 51 are connected by a threaded drive with minimal thread clearance and minimal backlash. A double-start thread can be used, but a single-start thread or other multi-start threads can also be used; multi-start threads provide better fit. During focusing, rotating the roller 53 drives the second guide rod 52, which in turn drives the first guide rod 51 to move the focusing assembly along the optical axis for focusing. Using roller focusing allows for one-handed operation, making it convenient and smooth. Furthermore, this focusing unit has a more compact structure, facilitating miniaturization and large-stroke focusing. The first guide rod 51 and the second guide rod 52 can be of any shape, such as a straight line or an L-shape. The lenses in the lens assembly 4 can be irregularly shaped lenses, such as the lens near the object side being cut to avoid the laser 7, which is more conducive to miniaturization. The laser 7 is fixed on the lens barrel 3, which has high fitting accuracy and helps to reduce the baseline distance between the optical axis of the laser and the optical axis of the lens, making it easier to ensure the baseline error (such as parallelism) between the optical axis of the laser and the optical axis of the lens. The laser 7 is located between the front housing 1 and the lens barrel 3. The imaging module is preferably built into the hollow cavity formed by the front housing 1 or the rear housing 2, or both the front housing 1 and the rear housing 2. It includes an imaging chip and a circuit board. The imaging chip and the laser 7 can be electrically connected to the circuit board. For example, the laser 7 can be connected to the circuit board through a ribbon cable connector. The measured data can be transmitted to an external device (such as a computer) and displayed on the computer, such as in the image displayed on the computer screen.

[0021] In one embodiment, the first guide rod 51 is provided with a first polygonal limiting section, and the rear wall of the front housing 1 is provided with a first polygonal hole. The first polygonal limiting section cooperates with the first polygonal hole to realize the rotational limiting of the first guide rod 51 and the front housing 1. The second guide rod 52 is provided with a second polygonal limiting section, and the roller 53 is provided with a second polygonal hole. The second polygonal limiting section cooperates with the second polygonal hole to realize the rotational limiting of the second guide rod 52 and the roller 53.

[0022] The cross-sections of the first polygonal limiting segment and the second polygonal limiting segment can be non-circular, such as quadrilaterals, pentagons, or hexagons. The limiting hole (first polygonal hole) of the first guide rod 51 is not necessarily on the rear wall of the front housing 1, but can also be placed in other positions of the front housing 1 or on other parts (such as the rear housing 2).

[0023] In one embodiment, the inner wall of the rear housing 2 is also connected to a sealing cover, the focusing unit 5 also includes multiple sealing rings 57, the roller 53 is built into the sealing cover, and the second guide rod 52 passes through the sealing cover and is sealed with the contact surface of the sealing cover by the sealing rings 57 respectively.

[0024] The second guide rod 52 passes through the two opposite side walls of the sealing cover. The second guide rod 52 is sealed to the opposite side walls by sealing rings, which can improve the smoothness of rotation and ensure the sealing performance. The roller 53 is isolated to the outside, which facilitates operation and helps to improve the waterproof performance.

[0025] In one embodiment, the focusing unit 5 further includes a third pressure ring 54, a guide seat 55, and a screw 56. The guide seat 55 is connected to the focusing assembly. The first guide rod 51 passes through the guide seat 55 and is clearance-fitted with the guide seat 55. The third pressure ring 54 is threadedly connected to the first guide rod 51 to limit the movement of the guide seat 55. The screw 56 is threadedly connected to the end of the second guide rod 52 away from the first guide rod 51. The second guide rod 52 is also provided with a limiting ring. The movement of the second guide rod 52 is limited by the limiting ring and the screw 56 abutting against the rear housing 2.

[0026] The first guide rod 51 and the guide seat 55 are movably connected, with a very small axial gap and a certain radial gap to avoid excessive limitation that would prevent the first guide rod 51 from horizontally pushing the guide seat 55.

[0027] In one embodiment, the lens assembly 4 further includes a lens mount, a focusing assembly is built into the lens mount, and the lens mount and the lens barrel 3 are slidably connected through a guide unit.

[0028] The lens mount has a mounting limiting groove for the guide seat 55 to ensure the installation accuracy of the guide seat 55 and avoid transmission jamming due to deviations such as tilting or rotation. The guiding unit may include at least one guide groove and at least one guide pin. The guide groove is formed on the lens mount, and the guide pin is located on the lens barrel 3, preferably evenly distributed. The guide groove and the guide pin slide in a one-to-one correspondence to achieve the movement of the lens mount relative to the lens barrel 3 along the optical axis. Alternatively, the guiding unit may have a boss directly machined on the lens barrel 3 to match the groove on the lens mount for guidance.

[0029] In one embodiment, the lens barrel 3 is detachably connected to the front housing 1. This facilitates disassembly and maintenance and provides good waterproof performance.

[0030] In one embodiment, the manual adjustment lens with laser ranging function further includes a limiting ring 9, a first pressure ring 31, a fixing ring 32, and a second pressure ring 33. The second pressure ring 33 is connected to the lens mount to clamp the focusing assembly. The limiting ring 9 is connected to the object side end of the front housing 1 to achieve axial limiting of the lens barrel 3. The first pressure ring 31 and the fixing ring 32 are both built into the lens barrel 3, and the fixing ring 32 is located between the first pressure ring 31 and the fixing assembly. The first pressure ring 31 is connected to the lens barrel 3 and presses against the fixing ring 32 to clamp the fixing assembly.

[0031] The limiting ring 9 can be threaded to the object-side end of the front housing 1, and all connections can be sealed, such as between the front housing 1 and the rear housing 2, between the limiting ring 9 and the front housing 1, and between the limiting ring 9 and the lens barrel 3. The fixing assembly is clamped and fixed to the lens barrel 3 by the first pressure ring 31 and the fixing ring 32. The fixing assembly can be sealed by adhesive or sealing ring. When the fixing assembly is an irregularly shaped lens, the corresponding first pressure ring 31 and fixing ring 32 can also be irregularly shaped. The fitting design is based on the cut part of the lens on the fixing assembly and the size of the subsequent window glass position. It can effectively block the window glass and the adhesive part of the first lens of the fixing assembly, and reliably press it onto the first lens. The first pressure ring 31 and fixing ring 32 have a guide structure for installation with the lens barrel 3, such as the form of a boss and groove. The mating direction is unique, and the installation operation is convenient.

[0032] In one embodiment, the fixing ring 32 has a first window facing the laser 7, and the first window is fitted with window glass 8.

[0033] Among them, the window glass 8 is fixed by applying adhesive or by sealing and fixing with a sealing ring.

[0034] In one embodiment, at least one of the object side and the image side of the window glass 8 is coated with a film layer, the film layer having a transmittance of less than or equal to 30% in the visible light band and a transmittance of greater than or equal to 93% in the emission band of the laser 7.

[0035] The laser 7 is protected by a window glass 8 at its front end. The material of the window glass 8 is not limited (e.g., K9). After coating, the window glass 8 has low transmittance (≤30%) in the visible light band to ensure that the internal structure is invisible to the naked eye, and high transmittance in the emission band of the laser 7 to reduce the impact of the window glass on the laser performance (e.g., if the emission band of the laser 7 is 1550nm, then the transmittance of the window glass at 1550±30nm should be greater than or equal to 93%). The specific requirements can be adjusted according to the performance of the laser. The coating can be an existing technology such as a high-reflectivity coating or adjusted according to actual needs. Preferably, the coating is applied to both the object side and the image side of the window glass 8.

[0036] In one embodiment, the fixed group includes a first lens 41, and the focusing group includes a second lens 42. The first lens 41, the second lens 42, and the imaging module 6 are arranged sequentially along the optical axis. The laser 7 is also electrically connected to the imaging module 6. The fixed group has a notch to avoid the laser 7, and the optical axis of the laser 7 is parallel to the optical axis of the lens group 4.

[0037] Specifically, this embodiment employs a two-element lens. The fixed assembly includes a first lens 41, and the focusing assembly includes a second lens 42. Both the object-side surfaces of the first lens 41 and the second lens 42 are convex, while their image-side surfaces are concave. The first lens 41 is cut to create space for mounting the laser 7. The second lens 42 is a movable lens, allowing for focusing at different object distances by moving it. After cutting, the first lens 41 is fitted with a corresponding structural shape on the lens barrel 3, ensuring reliable contact between the first lens 41 and the lens barrel 3. The lens barrel 3 has a mounting groove that precisely matches the shape of the laser 7, allowing for accurate alignment and stable mounting of the laser 7. The laser 7 can be securely fixed to the lens barrel 3 using screws. A window glass 8 is placed at the front end of the laser 7. The window glass 8 has high transmittance in the working wavelength band of the laser 7. The window glass 8 is sealed by a sealing ring or by applying adhesive. A fixing ring 32 is designed according to the shape of the first lens 41 and the window glass 8. There is a limit guide between the fixing ring 32 and the lens barrel 3. The installation is unique, which ensures that the fixing ring 32 is reliably against the first lens 41. Finally, the fixing ring 32 is pressed tightly by the first pressure ring 31, thereby fixing the first lens 41 and the window glass 8.

[0038] The second lens 42 is fixed to the lens mount by the second pressure ring 33. The guide seat 55 is installed on the lens mount and has dimensional limits to achieve high-precision alignment. During installation, the guide groove on the lens barrel 3 is aligned with the guide pin fixed on the lens mount, thereby ensuring that the lens mount will not rotate and ensuring that the lens mount can achieve linear movement during focusing, thus optimizing the optical axis control.

[0039] The focusing unit 5 consists of a first guide rod 51, a second guide rod 52, a roller 53, a third pressure ring 54, a guide seat 55, a screw 56, and multiple sealing rings 57. The first guide rod 51 passes through the first polygonal hole of the front housing 1 to restrict the rotation of the first guide rod 51 so that it can only move linearly. The object-side end of the first guide rod 51 also passes through the guide seat 55 and is locked by the third pressure ring 54 to limit the first guide rod 51 on the guide seat 55 to form a non-rigid connection, so that the first guide rod 51 retains a certain amount of movement in the radial direction and has a very small displacement in the axial direction. After the first guide rod 51 is locked by the third pressure ring 54, it will not squeeze the guide seat 55. When the first guide rod 51 passes through the front housing 1, its middle part rests in the first polygonal hole of the front housing 1 to restrict the rotation of the first guide rod 51, such as the first polygonal hole having a quadrilateral cross section. The other end of the first guide rod 51 has a multi-start internal thread, which connects to the multi-start external thread of the second guide rod 52. The cross-section of the inner hole (second polygonal hole) of the roller 53 is also quadrilateral. The second guide rod 52 fits tightly with the roller, and the fit clearance can be controlled within 0.01mm. The roller 32 is first placed in the sealing cover. The second guide rod 52 passes through the sealing cover and the roller 32 and is locked with screws 56 to prevent the second guide rod 52 from moving axially. A sealing ring 57 is installed on each side of the second guide rod 52. The contact between the sealing ring 57 and the wall of the sealing cover can be used to adjust the smoothness of rotation and play a sealing role. When the roller 32 rotates, it drives the second guide rod 52 to rotate together. When the second guide rod 52 rotates, it drives the first guide rod 51 to move back and forth through the multi-start thread, thereby driving the second lens 42 to move back and forth by the lens mount to achieve focusing. The lead of the multi-start thread is designed based on the distance required for focusing and the rotation angle required for roller 32. For example, if the focusing stroke is h1mm and the rotation angle required for roller 32 is t turns, then the lead p of the multi-start thread is calculated as follows: p = h1 / t (mm).

[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The embodiments described above are merely specific and detailed examples of the embodiments described in this application, and should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. A manually adjustable lens with laser rangefinding function, characterized in that: The manually adjustable lens with laser ranging function includes: Front housing (1); The rear housing (2) is detachably connected to the front housing (1); The lens tube (3) is built into the front housing (1); The lens assembly (4) is built into the lens barrel (3) and includes a fixed assembly and a focusing assembly, each having at least one lens. The focusing unit (5) includes a first guide rod (51), a second guide rod (52), and a roller (53). The first guide rod (51) and the second guide rod (52) are threaded together and located in the hollow cavity formed by the front housing (1) and the rear housing (2). The first guide rod (51) is slidably connected to at least one of the front housing (1) and the rear housing (2). The second guide rod (52) is rotatably connected to the rear housing (2). The roller (53) is coaxially connected to the second guide rod (52) and protrudes from the outer wall of the rear housing (2). When the roller (53) rotates, it drives the second guide rod (52) to rotate, thereby driving the first guide rod (51) to move the focusing group along the optical axis. A laser (7) is located between the front housing (1) and the lens barrel (3) and is used to emit light to the object side of the lens group (4) to achieve distance measurement; The imaging module (6) is located on the image side of the mirror group (4).

2. The manually adjustable lens with laser rangefinding function as described in claim 1, characterized in that: The first guide rod (51) is provided with a first polygonal limiting section, and the rear wall of the front housing (1) is provided with a first polygonal hole. The first polygonal limiting section and the first polygonal hole cooperate to realize the rotation limiting of the first guide rod (51) and the front housing (1). The second guide rod (52) is provided with a second polygonal limiting section, and the roller (53) is provided with a second polygonal hole. The second polygonal limiting section and the second polygonal hole cooperate to realize the rotation limiting of the second guide rod (52) and the roller (53).

3. The manually adjustable lens with laser rangefinding function as described in claim 1, characterized in that: The inner wall of the rear housing (2) is also connected to a sealing cover. The focusing unit (5) also includes multiple sealing rings (57). The roller (53) is built into the sealing cover. The second guide rod (52) passes through the sealing cover and is sealed with the sealing rings (57) respectively on the contact surface of the sealing cover.

4. The manually adjustable lens with laser rangefinding function as described in claim 1, characterized in that: The focusing unit (5) further includes a third pressure ring (54), a guide seat (55), and a screw (56). The guide seat (55) is connected to the focusing assembly. The first guide rod (51) passes through the guide seat (55) and is clearance-fitted with the guide seat (55). The third pressure ring (54) is threadedly connected to the first guide rod (51) to limit the movement of the guide seat (55). The screw (56) is threadedly connected to the end of the second guide rod (52) away from the first guide rod (51). The second guide rod (52) is also provided with a limiting ring. The movement of the second guide rod (52) is limited by the limiting ring and the screw (56) abutting against the rear housing (2).

5. The manually adjustable lens with laser rangefinding function as described in claim 1, characterized in that: The lens assembly (4) also includes a lens mount, the focusing assembly is built into the lens mount, and the lens mount and the lens barrel (3) are slidably connected through a guide unit.

6. The manually adjustable lens with laser rangefinding function as described in claim 5, characterized in that: The lens barrel (3) is detachably connected to the front housing (1).

7. The manually adjustable lens with laser ranging function as described in claim 6, characterized in that: The manual adjustment lens with laser rangefinding function also includes a limiting ring (9), a first pressure ring (31), a fixing ring (32), and a second pressure ring (33). The second pressure ring (33) is connected to the lens mount to clamp the focusing group. The limiting ring (9) is connected to the object side end of the front housing (1) to achieve axial positioning of the lens barrel (3). The first pressure ring (31) and the fixing ring (32) are both built into the lens barrel (3), and the fixing ring (32) is located between the first pressure ring (31) and the fixing group. The first pressure ring (31) is connected to the lens barrel (3) and presses against the fixing ring (32) to clamp the fixing group.

8. The manually adjustable lens with laser rangefinding function as described in claim 7, characterized in that: The fixing ring (32) has a first window facing the laser (7), and the first window is fitted with window glass (8).

9. The manually adjustable lens with laser rangefinding function as described in claim 8, characterized in that: At least one of the object side and the image side of the window glass (8) is coated with a film layer, the film layer having a transmittance of less than or equal to 30% in the visible light band and a transmittance of greater than or equal to 93% in the emission band of the laser (7).

10. The manually adjustable lens with laser ranging function as described in claim 1, characterized in that: The fixed assembly includes a first lens (41), and the focusing assembly includes a second lens (42). The first lens (41), the second lens (42), and the imaging module (6) are arranged sequentially along the optical axis. The laser (7) is also electrically connected to the imaging module (6). The fixed assembly has a notch to avoid the laser (7). The optical axis of the laser (7) is parallel to the optical axis of the lens assembly (4).

Images