A laser range finder

Abstract

The application relates to the technical field of laser ranging, in particular to a laser range finder, which comprises a laser emitter, a collimating lens, a receiver, a receiving lens, a collimating lens barrel, a receiving lens barrel and light-shielding cleaning glue; the collimating lens barrel is provided with a first accommodating groove, a first opening of the first accommodating groove corresponds to and covers a side wall of the collimating lens, and extends to a side wall of the collimating lens close to a light-out surface and beyond the side wall, the light-shielding cleaning glue comprises first light-shielding cleaning glue, in a first state, the first light-shielding cleaning glue is filled in the first accommodating groove and covers the side wall of the collimating lens, in a second state, part of the first cleaning glue spreads out from the first opening beyond the side wall and covers the light-out surface of the collimating lens; and / or the receiving lens barrel is provided with a second accommodating groove, a second opening of the second accommodating groove corresponds to and covers a side wall of the receiving lens, and extends to a side wall of the receiving lens close to a light-in surface and beyond the side wall, the light-shielding cleaning glue comprises second light-shielding cleaning glue filled in the second accommodating groove.

Description

Technical Field

[0001] This application relates to the field of laser ranging technology, and in particular to a laser rangefinder. Background Technology

[0002] Laser ranging technology is an active remote sensing technology that uses light emitted by a laser emitter (LiDAR) to measure the distance to an object. A laser rangefinder is an instrument that uses laser ranging as a technology to measure the distance to a target.

[0003] In recent years, with the continuous upgrading of technologies such as lidar and sensors, laser rangefinder products have been continuously innovated and their performance optimized. Although the domestic laser rangefinder industry has entered a stage of rapid development, it still faces many problems. For example, during the operation of a laser rangefinder, while the detector receives the laser beam reflected by the target object, it also receives large-angle ambient stray light and stray light from the transmitting module. This stray light can seriously interfere with the ranging accuracy. Another example is that the cleanliness of the laser rangefinder lens affects the ranging accuracy. The relevant technology usually uses a cleaning cloth to clean the lens. This friction-based cleaning method can damage the lens and also results in low cleanliness.

[0004] Therefore, laser rangefinders based on this technology suffer from problems such as excessive stray light and low lens cleanliness. Summary of the Invention

[0005] In order to reduce stray light in a laser rangefinder and improve the cleanliness of its lens, this application provides a laser rangefinder.

[0006] The laser rangefinder provided in this application adopts the following technical solution:

[0007] A laser rangefinder, comprising:

[0008] The system includes a transmitting unit and a receiving unit. The transmitting unit includes a laser emitter and a collimating lens. The receiving unit includes a receiver and a receiving lens. The collimating lens is used to collimate the laser emitted by the laser emitter to the object under test. The receiving lens is used to receive and conduct the laser reflected by the object under test to the receiver.

[0009] The collimating lens barrel, the receiving lens barrel, and the light-shielding cleaning adhesive are provided. The collimating lens barrel is fitted onto the collimating lens, and the receiving lens barrel is fitted onto the receiving lens. The collimating lens barrel has a first receiving groove, the first opening of which corresponds to the sidewall of the collimating lens, covers the sidewall of the collimating lens, and extends beyond the sidewall of the collimating lens near the light-emitting surface. The light-shielding cleaning adhesive includes a first light-shielding cleaning adhesive. In a first state, the first light-shielding cleaning adhesive fills the first receiving groove and covers the sidewall of the collimating lens. In a second state, a portion of the first cleaning adhesive diffuses out from the first opening beyond the sidewall of the collimating lens and covers the light-emitting surface of the collimating lens; and / or,

[0010] The receiving lens barrel is provided with a second receiving groove. The second opening of the second receiving groove corresponds to the side wall of the receiving lens, covers the side wall of the receiving lens, and extends beyond the side wall of the receiving lens near the light-incident surface. The light-shielding cleaning adhesive includes a second light-shielding cleaning adhesive. In the first state, the second light-shielding cleaning adhesive fills the second receiving groove and covers the side wall of the receiving lens. In the second state, a portion of the second cleaning adhesive diffuses out from the opening beyond the light-incident surface of the receiving lens and covers the light-incident surface of the receiving lens.

[0011] By adopting the above technical solution, in the first state of the laser rangefinder, when measuring distance, the light-shielding cleaning adhesive is stored in the receiving groove, covering the side of the corresponding lens, which absorbs stray light at a large angle, thereby improving the ranging accuracy of the laser rangefinder. In the second state of the laser rangefinder, when cleaning, some of the light-shielding cleaning adhesive overflows from the opening of the receiving groove, flows and covers the surface of the corresponding lens, adsorbing impurity particles on the lens surface, thereby cleaning and protecting the lens. When ranging is required again, the light-shielding cleaning adhesive is returned to the receiving groove. The laser rangefinder provided in this embodiment reduces stray light to improve ranging accuracy while achieving a self-cleaning effect of the lens, improving the lens cleanliness of the laser rangefinder and further improving ranging accuracy.

[0012] Optionally, the light-shielding cleaning adhesive is a black cleaning soft adhesive.

[0013] By adopting the above technical solution, the color characteristics of the light-shielding cleaning adhesive are used to achieve the effect of removing stray light, and the cleaning soft adhesive properties of the light-shielding cleaning adhesive are used to achieve the self-cleaning effect.

[0014] Optionally, the collimating lens barrel further includes a first pushing plate, which is disposed in the first receiving groove and parallel to the light-incident surface of the collimating lens. The first pushing plate is located on the side of the light-incident surface of the collimating lens away from the light-outcident surface. The first pushing plate is fixedly connected to the light-shielding cleaning adhesive. The first pushing plate can move in a direction parallel to the side wall of the collimating lens, thereby pushing out part of the light-shielding cleaning adhesive from the first receiving groove, or pulling the light-shielding cleaning adhesive outside the first receiving groove back into the receiving groove.

[0015] By adopting the above technical solution, the first push plate is used to push the light-shielding cleaning adhesive out of the first receiving groove and pull it back into the first receiving groove.

[0016] Optionally, the first push plate is provided with a first handle protruding from the outer wall of the collimating lens barrel, and the outer wall is provided with a first sliding groove corresponding to the handle. Under the drive of an external force, the first handle can drive the first push plate to move in a direction parallel to the side wall of the collimating lens.

[0017] By adopting the above technical solution, the first push plate was moved in a direction parallel to the side wall of the collimating lens using the first handle.

[0018] Optionally, the laser rangefinder further includes a driver connected to the first push plate for driving the first push plate to move in a direction parallel to the sidewall of the collimating lens; the driver includes any one of a hydraulic driver, a pneumatic driver, and a voltage driver.

[0019] By adopting the above technical solution, the first push plate is moved in a direction parallel to the side wall of the collimating lens using a driver.

[0020] Optionally, the bottom of the first receiving slot can be removed from the collimating lens barrel, and the light-shielding cleaning adhesive can be removed from the first receiving slot for replacement.

[0021] By adopting the above technical solution, the replacement of the light-shielding cleaning adhesive was achieved, ensuring the good light-shielding and cleaning effect of the light-shielding cleaning adhesive.

[0022] Optionally, the first opening extends beyond the sidewall of the collimating lens, but does not exceed the highest point of the light-emitting surface of the collimating lens.

[0023] By adopting the above technical solution, it is beneficial for the first light-shielding cleaning adhesive to flow and cover the first light-emitting surface, while avoiding the upper end of the first opening from extending too far beyond the light-emitting surface of the collimating lens.

[0024] Optionally, the inner wall of the first receiving groove is coated with non-stick paint.

[0025] By adopting the above technical solution, the frictional resistance between the first light-shielding cleaning adhesive and the collimating lens barrel is reduced, which makes it easier for the first light-shielding cleaning adhesive to spread out of and retract into the first receiving groove.

[0026] Optionally, both the collimating lens and the receiving lens are provided with an anti-light silkscreen.

[0027] By adopting the above technical solution, the effect of removing stray light in laser rangefinders has been further improved, and the ranging accuracy has been further improved.

[0028] Optionally, the collimating lens and the receiving lens have the same lens structure, and the collimating lens barrel and the receiving lens barrel have the same lens barrel structure.

[0029] By adopting the above technical solution, the inventive points of this application are also applicable to laser rangefinders where the collimating lens and the receiving lens have the same lens structure.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. When the laser rangefinder is measuring distance in the first state, the light-shielding cleaning adhesive is stored in the receiving groove and covers the side of the corresponding lens, which can absorb stray light at a large angle, thereby improving the ranging accuracy of the laser rangefinder.

[0032] 2. During the cleaning of the laser rangefinder in the second state, some of the light-shielding cleaning adhesive overflows from the opening of the receiving groove, flows and covers the surface of the corresponding lens, adsorbs impurity particles on the lens surface, and thus cleans and protects the lens; when the rangefinder needs to be measured again, the light-shielding cleaning adhesive is returned to the receiving groove.

[0033] 3. The laser rangefinder provided in this embodiment reduces stray light to improve ranging accuracy while achieving a self-cleaning effect of the lens, thereby improving the lens cleanliness of the laser rangefinder and further enhancing ranging accuracy. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the laser rangefinder in the first state in Embodiment 1 of this application.

[0035] Figure 2 This is a schematic diagram of the laser rangefinder in the second state in Embodiment 1 of this application.

[0036] Figure 3 This is a schematic diagram of the laser rangefinder in the first state in Embodiment 2 of this application.

[0037] Figure 4 This is a schematic diagram of the laser rangefinder in the second state in Embodiment 2 of this application.

[0038] Figure 5 This is a schematic diagram of the laser rangefinder in the first state in Embodiment 3 of this application.

[0039] Figure 6 This is a schematic diagram of the laser rangefinder in the second state in Embodiment 4 of this application.

[0040] Explanation of reference numerals in the attached figures:

[0041] 11. Laser emitter; 12. Collimating lens; 121. First light-emitting surface; 122. First light-incident surface; 123. First side surface; 21. Receiver; 22. Receiving lens; 221. Second light-emitting surface; 222. Second light-incident surface; 223. Second side surface; 31. Collimating lens barrel; 311. First receiving groove; 312. First opening; 313. First push plate; 314. First handle; 315. First slide groove; 32. Receiving lens barrel; 321. Second receiving groove; 322. Second opening; 323. Second push plate; 41. First light-shielding cleaning adhesive; 42. Second light-shielding cleaning adhesive. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0043] This application discloses a laser rangefinder.

[0044] Example 1

[0045] Reference Figure 1 and Figure 2 The laser rangefinder provided in this application includes a transmitting unit and a receiving unit. The transmitting unit emits a ranging laser towards the object to be measured. After the ranging laser reaches the object, it is reflected. The reflected laser is received by the receiving unit, and the distance between the object and the laser rangefinder is obtained through data analysis.

[0046] The transmitting unit specifically includes a laser emitter 11 and a collimating lens 12. The collimating lens 12 is located in the light output path of the laser emitter 11 and is used to collimate the laser emitted by the laser emitter 11, so that the laser rangefinder illuminates the object to be measured with collimated light. The receiving unit specifically includes a receiver 21 and a receiving lens 22. The receiving lens 22 is used to receive the laser reflected back from the object to be measured and to transmit the laser to the receiver 21.

[0047] The collimating lens 12 and the receiving lens 22 can be configured according to techniques commonly used by those skilled in the art. Typically, the light-incident surface of the collimating lens 12 is a plane, the light-exiting surface is a convex curved surface, and the side surface is cylindrical; the light-incident surface of the receiving lens 22 is a convex curved surface, the light-exiting surface is a plane, and the side surface is cylindrical. In this embodiment, the light-incident surface of the collimating lens 12 is designated as the first light-incident surface 122, the light-exiting surface as the first light-exiting surface 121, and the side surface as the first side surface 123; the light-incident surface of the receiving lens 22 is designated as the second light-incident surface 222, the light-exiting surface as the second light-exiting surface 221, and the side surface as the second side surface 223. Both the collimating lens 12 and the receiving lens 22 provided in this embodiment have an embedded matte screen printing.

[0048] The laser rangefinder also includes a collimating lens tube 31 and a receiving lens tube 32. The collimating lens tube 31 is fitted onto the collimating lens 12, and the receiving lens tube 32 is fitted onto the receiving lens 22.

[0049] In this embodiment, the collimating lens barrel 31 is provided with a first receiving groove 311, and the opening of the first receiving groove 311 is referred to as the first opening 312. The first opening 312 corresponds to the side wall of the collimating lens 12. The diameter of the first opening 312 is larger than that of the side wall of the collimating lens 12. The first opening 312 covers the first side surface 123, providing a basis for the first light-shielding cleaning adhesive 41 to directly contact the first side surface 123. The first opening 312 extends beyond the first side surface 123, providing a basis for the first light-shielding cleaning adhesive 41 to spread out of the collimating lens barrel 31 from the first opening 312.

[0050] The collimating lens barrel 31 also includes a first push plate 313, which is disposed within a first receiving groove 311 and is parallel to the first light-incident surface 122. The first push plate 313 can move within the first receiving groove 311 parallel to the direction of the first sidewall, specifically through manual drive and automatic control. Manual drive can be achieved by providing a first handle 314 on the first push plate 313. The first handle 314 protrudes from the outer sidewall of the collimating lens barrel 31, and the outer sidewall of the collimating lens barrel 31 has a first sliding groove 315 corresponding to the first handle 314. Under external force, the first handle 314 can drive the first push plate 313 to move in a direction parallel to the first sidewall. Automatic control can be achieved by installing a driver within the laser rangefinder. The driver includes, but is not limited to, a hydraulic driver, a pneumatic driver, and a voltage driver.

[0051] The laser rangefinder also includes a first light-shielding cleaning adhesive 41, which is a black cleaning soft adhesive. One end of the first light-shielding cleaning adhesive 41 is fixedly connected to the side of the first push plate 313 near the first light-emitting surface 121. In the first state, that is, during the laser rangefinder's ranging process, the first light-shielding cleaning adhesive 41 is located in the first receiving groove 311, covering the first side 123, which absorbs stray light at large angles that are not collimated, improves the collimation of the emitted light from the emitting unit, and thus improves the ranging accuracy of the laser rangefinder. In the second state, i.e., when the laser rangefinder is not measuring distance, the first push plate 313 is pushed upward. Under the push of the first push plate 313, part of the first light-shielding cleaning adhesive 41 overflows from the first opening 312 at the first light-emitting surface 121 and spreads out using its own leveling properties, covering the first light-emitting surface 121 and adsorbing impurity particles on it, thus cleaning the first light-emitting surface 121. Simultaneously, the first light-shielding cleaning adhesive 41 covering the first light-emitting surface 121 provides a certain degree of protection, avoiding mechanical damage to the first light-emitting surface 121 and reducing the risk of mechanical damage to the collimating lens 12. This cleaning method achieves self-cleaning of the laser rangefinder and the collimating lens 12. Simultaneously, the use of a cleaning adhesive to adsorb and clean the mirror surface ensures cleanliness while protecting the mirror surface and avoiding damage caused by friction cleaning. When transitioning from the second state to the first state, simply push the first push plate 313 downwards, and the first light-shielding cleaning adhesive 41 will retract back into the first receiving groove 311 under the pull of the first push plate 313.

[0052] Furthermore, the upper end of the first opening 312 is preferably flush with the highest point of the first light-emitting surface 121. This is more conducive to the first light-shielding cleaning adhesive 41 flowing and covering the first light-emitting surface 121, while avoiding the upper end of the first opening 312 extending too far beyond the first light-emitting surface 121.

[0053] The lower end of the first opening 312 is flush with the first light-incident surface 122, thus confirming the good coverage effect of the first light-shielding cleaning adhesive 41 on the first side surface 123. Furthermore, the first receiving groove 311 diffracts to the lower side of the first opening 312; this ensures that the first receiving groove 311 has enough space to hold enough of the first light-shielding cleaning adhesive 41. When the laser rangefinder is in the second state, the first pushing plate 313 only needs to move within the space below the first opening 312 to allow part of the first light-shielding cleaning adhesive 41 to spread out from the first opening 312 and cover the first light-emitting surface 121, avoiding the risk of the first pushing plate 313 damaging the collimating lens 12 when pushed to its position. Whether in the first state or the second state, the first light-shielding cleaning adhesive 41 always covers the first side 123. This ensures the side light-shielding of the collimating lens 12 and prevents impurity particles from entering between the collimating lens 12 and the collimating lens barrel 31. On the other hand, it also connects the collimating lens 12 and the collimating lens barrel 31 and fixes the collimating lens 12. Furthermore, the first light-shielding cleaning adhesive 41, with its flow properties, avoids hard collisions between the collimating lens barrel 31 and the collimating lens 12, thus protecting the collimating lens 12.

[0054] Furthermore, the inner wall of the first receiving groove 311 is coated with non-stick paint, which further reduces the frictional resistance between the first light-shielding cleaning adhesive 41 and the collimating lens barrel 31, and makes it more convenient for the first light-shielding cleaning adhesive 41 to spread out of the first receiving groove 311 and return to the first receiving groove 311.

[0055] Furthermore, the bottom of the first receiving groove 311 can be removed from the collimating lens tube 31, so that the first light-blocking cleaning adhesive 41 can be taken out from the first receiving groove 311 for replacement, thereby ensuring the good light-blocking and cleaning effect of the first light-blocking cleaning adhesive 41.

[0056] The implementation principle of the laser rangefinder provided in Embodiment 1 of this application is as follows: When the laser rangefinder is measuring distance, the first light-shielding cleaning adhesive 41 is stored in the first receiving groove 311, covering the first side 123, which absorbs stray light at a large angle that is not collimated, improves the collimation of the emitted light of the emitting unit, and thus improves the ranging accuracy of the laser rangefinder; when the laser rangefinder is cleaning, the first pushing plate 313 is pushed upward, and part of the first light-shielding cleaning adhesive 41 overflows from the first opening 312 at the first light-emitting surface 121, flows and covers the first light-emitting surface 121, adsorbs impurity particles on the first light-emitting surface 121, thereby cleaning the first light-emitting surface 121 and protecting the first light-emitting surface 121; when ranging is required again, the first pushing plate 313 is pushed downward, and the first light-shielding cleaning adhesive 41 is pulled back into the first receiving groove 311 by the first pushing plate 313. The laser rangefinder provided in this embodiment reduces stray light to improve ranging accuracy, while achieving a self-cleaning effect on the first light-emitting surface 121 of the collimating lens 12, thereby improving the lens cleanliness of the laser rangefinder and further improving ranging accuracy.

[0057] Example 2

[0058] Reference Figure 3 and Figure 4 The difference between Embodiment 2 and Embodiment 1 is that: the receiving lens barrel 32 is provided with a second receiving groove 321, the opening of the second receiving groove 321 is referred to as the second opening 322, the second opening 322 corresponds to the second side surface 223 of the receiving lens 22, the diameter of the second opening 322 is larger than that of the second side surface 223, the second opening 322 covers the second side surface 223 and extends beyond the second side surface 223; the receiving lens barrel 32 also includes a second pushing plate 323, the second pushing plate 323 is disposed in the second receiving groove 321, the second pushing plate 323 is parallel to the second light-emitting surface 221; the laser rangefinder also includes a second light-shielding cleaning adhesive 42, one end of the second light-shielding cleaning adhesive 42 is fixedly connected to the side of the second pushing plate 323 near the second light-incident surface 222.

[0059] The implementation principle of the laser rangefinder provided in Embodiment 2 of this application is as follows: When the laser rangefinder is measuring distance, the second light-shielding cleaning adhesive 42 is stored in the second receiving groove 321, covering the second side 223, which absorbs stray light at a large angle, improves the accuracy of the light received by the receiving unit, and thus improves the distance measuring accuracy of the laser rangefinder; when the laser rangefinder is cleaning, the second pushing plate 323 is pushed upward, and part of the second light-shielding cleaning adhesive 42 overflows from the second opening 322 at the second light-incident surface 222, flows and covers the second light-incident surface 222, adsorbs impurity particles on the second light-incident surface 222, thereby cleaning the second light-incident surface 222 and protecting the second light-incident surface 222; when distance measurement is required again, the second pushing plate 323 is pushed downward, and the second light-shielding cleaning adhesive 42 is pulled back into the second receiving groove 321 by the second pushing plate 323. The laser rangefinder provided in this embodiment reduces stray light to improve ranging accuracy, while achieving a self-cleaning effect on the second light-incident surface 222 of the receiving lens 22, thereby improving the lens cleanliness of the laser rangefinder and further enhancing ranging accuracy.

[0060] Example 3

[0061] Reference Figure 5 and Figure 6 The difference between Embodiment 3 and Embodiment 1 or Embodiment 2 is that: the collimating lens tube 31 is provided with a first receiving groove 311, and the receiving lens tube 32 is provided with a second receiving groove 321; the collimating lens tube 31 also includes a first push plate 313 located in the first receiving groove 311, and the receiving lens tube 32 also includes a second push plate 323 located in the second receiving groove 321; the laser rangefinder also includes a first light-shielding cleaning adhesive 41 and a second light-shielding cleaning adhesive 42, one end of the first light-shielding cleaning adhesive 41 is fixedly connected to the side of the first push plate 313 near the first light-emitting surface 121, and one end of the second light-shielding cleaning adhesive 42 is fixedly connected to the side of the second push plate 323 near the second light-incident surface 222.

[0062] In other embodiments, the collimating lens 12 and the receiving lens 22 may also be the same lens structure, and the collimating tube 31 and the receiving tube 32 may be the same tube structure.

[0063] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A laser rangefinder, characterized in that, include: The transmitting unit includes a laser emitter (11) and a collimating lens (12), and the receiving unit includes a receiver (21) and a receiving lens (22). The collimating lens (12) is used to collimate the laser emitted by the laser emitter (11) to the object under test, and the receiving lens (22) is used to receive and conduct the laser reflected by the object under test to the receiver (21). The collimating lens tube (31), the receiving lens tube (32), and the light-shielding cleaning adhesive are provided. The collimating lens tube (31) is fitted onto the collimating lens (12), and the receiving lens tube (32) is fitted onto the receiving lens (22). The collimating lens tube (31) is provided with a first receiving groove (311), and the first opening (312) of the first receiving groove (311) corresponds to the side wall of the collimating lens (12), covers the side wall of the collimating lens (12), and extends beyond the collimating lens. The mirror (12) has a sidewall near the light-emitting surface. The light-shielding cleaning adhesive includes a first light-shielding cleaning adhesive (41). In a first state, the first light-shielding cleaning adhesive (41) fills the first receiving groove (311) and covers the sidewall of the collimating lens (12). In a second state, a portion of the first light-shielding cleaning adhesive (41) diffuses out from the first opening (312) beyond the sidewall of the collimating lens (12) and covers the light-emitting surface of the collimating lens (12); and / or, The receiving lens barrel (32) is provided with a second receiving groove (321). The second opening (322) of the second receiving groove (321) corresponds to the side wall of the receiving lens (22), covers the side wall of the receiving lens (22), and extends beyond the side wall of the receiving lens (22) near the light-incident surface. The light-shielding cleaning adhesive includes a second light-shielding cleaning adhesive (42). In the first state, the second light-shielding cleaning adhesive (42) fills the second receiving groove (321) and covers the side wall of the receiving lens (22). In the second state, a portion of the second light-shielding cleaning adhesive (42) diffuses out from the opening beyond the light-incident surface of the receiving lens (22) and covers the light-incident surface of the receiving lens (22). The light-shielding cleaning adhesive is a black cleaning soft adhesive. Whether in the first state or the second state, the first light-shielding cleaning adhesive (41) always covers the side wall of the collimating lens (12). The collimating lens tube (31) also includes a first push plate (313), which enables the light-shielding cleaning adhesive to be pushed out from the first receiving groove (311) and pulled back into the first receiving groove (311); The first opening (312) extends beyond the sidewall of the collimating lens (12), but does not exceed the highest point of the light-emitting surface of the collimating lens (12).

2. The laser rangefinder as described in claim 1, characterized in that: The first push plate (313) is disposed in the first receiving groove (311) and parallel to the light-incident surface of the collimating lens (12). The first push plate (313) is disposed on the side of the collimating lens (12) away from the light-outcident surface. The first push plate (313) is fixedly connected to the light-shielding cleaning adhesive. The first push plate (313) can move in a direction parallel to the side wall of the collimating lens (12) to push out part of the light-shielding cleaning adhesive from the first receiving groove (311) or pull the light-shielding cleaning adhesive outside the first receiving groove (311) back into the receiving groove.

3. The laser rangefinder as described in claim 1, characterized in that, The first push plate (313) is provided with a first handle (314) protruding from the outer side wall of the collimating lens tube (31). The outer side wall is provided with a first sliding groove corresponding to the handle. The first handle (314) can drive the first push plate (313) to move in a direction parallel to the side wall of the collimating lens (12) under the drive of external force.

4. The laser rangefinder as described in claim 1, characterized in that, The laser rangefinder also includes a driver connected to the first push plate (313) for driving the first push plate (313) to move in a direction parallel to the sidewall of the collimating lens (12); the driver includes any one of a hydraulic driver, a pneumatic driver, and a voltage driver.

5. The laser rangefinder as described in claim 1, characterized in that, The bottom of the first receiving groove (311) can be removed from the collimating lens tube (31), and the light-shielding cleaning adhesive can be removed from the first receiving groove (311) for replacement.

6. The laser rangefinder as described in claim 1, characterized in that, The inner wall of the first receiving groove (311) is coated with non-stick paint.

7. The laser rangefinder as described in claim 1, characterized in that, Both the collimating lens (12) and the receiving lens (22) are provided with matte screen printing.

8. The laser rangefinder as described in claim 1, characterized in that, The collimating lens (12) and the receiving lens (22) have the same lens structure, and the collimating tube (31) and the receiving tube (32) have the same tube structure.

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