Probe receiving lens module based on laser rangefinder performance simulation test

Abstract

This invention discloses a probe receiving lens module for performance simulation testing of laser rangefinders, comprising a receiving lens group, a crosshair reticle, an optical attenuator, and a detector arranged sequentially along the optical path emission direction of the laser rangefinder under test. The emitting end of the detector utilizes the crosshair reference lines of the crosshair reticle to perform optical axis deflection calibration. A focal length fine-tuning structure adjusts the distance between the detector and the receiving lens group to fine-tune the focusing of the emitting end of the detector. An illumination unit is also provided relative to the crosshair reticle to provide illumination support. This invention optimizes and improves various aspects, from focus control and detector protection to observation reference illumination, providing a more accurate, efficient, and stable solution for performance simulation testing of laser rangefinders.

Description

Technical Field

[0001] This utility model relates to the field of laser rangefinder testing technology, and in particular to a probe receiving lens module based on laser rangefinder performance simulation testing. Background Technology

[0002] Simulation testing of laser rangefinders is an extremely important testing method. It can evaluate and verify various performance indicators of laser rangefinders without the need for actual and complex outdoor measurements.

[0003] Traditional laser rangefinder testing typically relies on real-world environmental testing. However, real-world environments contain numerous uncontrollable factors, such as weather, terrain, and target characteristics, which can interfere with the test results, making it difficult to accurately assess the true performance of the laser rangefinder. Simulation testing, on the other hand, can accurately simulate various real-world measurement scenarios with different distances and reflectivities by constructing specific optical environments and target models.

[0004] In the simulation testing of laser rangefinders, the performance of the receiving lens module is a key factor determining the overall system testing accuracy. In-depth analysis revealed that existing technical solutions have significant limitations in several aspects:

[0005] Firstly, regarding focus control, the receiving lens assembly and the detector are spaced at a fixed distance, making it impossible to fine-tune the focus to achieve precise matching. This makes it difficult to achieve accurate focusing in simulated measurement scenarios, thus affecting the accuracy of the test results.

[0006] Secondly, there is a significant risk of vulnerability in the detector hardware design. When a high-intensity beam is incident on the detector receiver, the detector is easily damaged due to the lack of attenuation mechanism, which affects the stability and reliability of the entire test system.

[0007] Finally, regarding the observation reference, due to the lack of illumination on the reticle, the visual recognition of the crosshairs is significantly reduced in low-light environments or under complex lighting conditions, which directly affects the operator's alignment accuracy and work efficiency. These technical defects collectively limit the performance and reliability of laser rangefinders in various application scenarios. Utility Model Content

[0008] The purpose of this invention is to propose a probe receiving lens module based on laser rangefinder performance simulation testing. This module aims to overcome the shortcomings of existing technologies in laser rangefinder performance simulation testing and provide support for more accurate and efficient testing.

[0009] To achieve the above objectives, this utility model discloses a probe receiving lens module for laser rangefinder performance simulation testing. Its key features include: a receiving lens group, a crosshair reticle, an optical attenuator, and a detector arranged sequentially along the optical path emission direction of the laser rangefinder under test; the emitting end of the detector uses the crosshair reference line of the crosshair reticle to complete optical axis deflection calibration; between the detector and the receiving lens group, a focal length fine-tuning structure adjusts the distance between them to fine-tune the focusing of the emitting end of the detector; an illumination unit is also provided relative to the crosshair reticle to provide illumination support.

[0010] Furthermore, the objective lenses in the receiving lens assembly are respectively assembled in the lens barrel by retaining rings, and the cross-shaped reticle is provided at the rear end of the lens barrel.

[0011] Furthermore, the focal length fine-tuning structure includes a sleeve that is threadedly connected to the lens barrel, and the detector is mounted inside the sleeve by means of a mounting plate; by rotating the sleeve, the distance between the receiving lens group and the detector can be adjusted; a set screw for limiting the rotational position of the sleeve is also provided between the sleeve and the lens barrel.

[0012] Furthermore, an optical attenuator is provided in the sleeve between the cross-shaped reticle and the detector.

[0013] Furthermore, the lighting unit includes a side-arranged LED light and a power cable, and the LED light is installed through a lighting hole reserved on the sleeve wall.

[0014] Furthermore, the lens barrel is mounted on a mounting base with leveling screw holes.

[0015] Compared with the prior art, the significant advantages of this utility model are:

[0016] (1) In terms of focus control, this invention utilizes a focal length fine-tuning structure to precisely adjust the focal length as needed, thereby achieving accurate matching between the focal lengths of the receiving lens group and the detector. This enables precise focusing in simulated measurement scenarios, significantly improving the accuracy of test results. This improvement solves the problem of fixed spacing between the receiving lens group and the detector in existing technologies, making the testing process more flexible and accurate.

[0017] (2) In terms of detector hardware design, the optical attenuator effectively solves the problem of detector fragility. When a high-intensity beam is incident on the detector receiver, the optical attenuator can attenuate the beam, preventing the detector from being damaged by the high-intensity beam and improving the stability and reliability of the entire test system;

[0018] (3) Regarding the observation reference, this module incorporates an illumination unit to address the lack of illumination on the reticle. This illumination unit includes side-mounted LED lights and power cables, providing illumination support for the crosshair reticle. Even in low-light environments or under complex lighting conditions, it significantly improves the visual recognition of the crosshairs, thereby enhancing the operator's alignment accuracy and work efficiency, and ensuring accurate simulation testing in various environments.

[0019] (4) The lens barrel is set on the mounting base with leveling screw holes, which facilitates the leveling operation of the entire probe receiving lens module, ensuring the stability of the module during installation and use, and further improving the accuracy and reliability of the test. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the internal structure of the probe receiving lens module in Embodiment 1 (I);

[0022] Figure 2 This is a schematic diagram (II) of the internal structure of the probe receiving lens module in Embodiment 1;

[0023] Figure 3 This is a front view of the probe receiving lens module in Embodiment 1;

[0024] Figure 4 This is a top view of the probe receiving lens module in Embodiment 1;

[0025] The following numbers are labeled in the diagram: 1-receiving lens group, 2-cross-shaped reticle, 3-light attenuator, 4-detector, 5-focus fine-tuning structure, 6-illumination unit, 7-lens barrel, 8-sleeve, 9-mounting plate, 10-set screw, 11-LED lighting, 12-power cable, 13-ring, 14-mounting base. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] Please see Figure 1 As an embodiment of this application: a probe receiving lens module based on laser rangefinder performance simulation test, including a receiving lens group 1, a crosshair reticle 2, an optical attenuator 3, and a detector 4 arranged sequentially along the optical path emission direction of the laser rangefinder under test; the emitting end of the detector 4 uses the crosshair reference line of the crosshair reticle 2 to complete the optical axis deflection angle calibration; between the detector 4 and the receiving lens group 1, the distance between them is also adjusted by a focal length fine-tuning structure 5 to fine-tune the focusing of the emitting end of the detector 4; an illumination unit 6 is also provided relative to the crosshair reticle 2, and the illumination unit 6 is used to provide illumination support.

[0029] The receiving lens group 1 efficiently collects the light emitted by the laser rangefinder under test and accurately guides the light to subsequent components. The crosshairs of the reticle 2 provide a precise reference for optical axis deviation calibration. By adjusting the position of the detector 4, its emitting end is precisely aligned with the crosshairs, ensuring the accuracy of the optical axis and improving measurement precision. The light attenuator 3 allows for adjustment of light intensity as needed, preventing damage to the detector 4 from excessive light and adapting to different measurement environments. The focus fine-tuning structure 5 employs a high-precision adjustment method, enabling precise adjustment of minute gaps. In actual operation, the operator can flexibly fine-tune the focus according to the specific measurement situation to achieve the best measurement results. The illumination unit 6 provides illumination support for the reticle 2. This allows the operator to clearly observe the crosshairs of the reticle 2 even in low-light environments, facilitating operations such as optical axis deviation calibration.

[0030] like Figure 2As shown, in specific implementation, the objective lenses in the receiving lens assembly 1 are respectively assembled into the lens barrel 7 via retaining rings 13, and the cross-shaped reticle 2 is provided at the rear end of the lens barrel 7. The use of retaining rings 13 ensures the stable installation of the objective lenses within the lens barrel 7, preventing displacement or shaking of the objective lenses during use, thereby ensuring the stability and reliability of the receiving lens assembly 1. The cross-shaped reticle 2 at the rear end of the lens barrel 7 allows the operator to visually calibrate the optical axis deviation angle of the detector 4's transmitting end from the front end of the lens barrel 7.

[0031] Please see Figure 2 and Figure 3 In this embodiment, the focus fine-tuning structure 5 includes a sleeve 8 that is threadedly connected to the lens barrel 7. The detector 4 is mounted inside the sleeve 8 via a mounting plate 9. By rotating the sleeve 8, the distance between the receiving lens group 1 and the detector 4 can be adjusted. A set screw 10 is also provided between the sleeve 8 and the lens barrel 7 to limit the rotation position of the sleeve 8. The threaded connection makes the rotation of the sleeve 8 more stable and precise, enabling fine adjustments to the distance. The operator only needs to rotate the sleeve 8 to flexibly change the distance between the receiving lens group 1 and the detector 4 according to actual needs, thereby fine-tuning the focusing of the transmitter end of the detector 4. The set screw 10 serves a fixing function. After the distance is adjusted to a suitable position, tightening the set screw 10 can prevent the sleeve 8 from rotating accidentally during use, ensuring the stability of the distance and guaranteeing the accuracy of the test results.

[0032] Specifically, a light attenuator 3 is installed in the sleeve 8 between the crosshair reticle 2 and the detector 4. The light attenuator 3 can effectively attenuate the light intensity according to different testing requirements. When encountering a high-intensity beam, it can reduce the light intensity to a range that the detector 4 can withstand, preventing the detector 4 from being damaged due to excessive light, extending the service life of the detector 4, and also improving the stability and reliability of the entire testing system.

[0033] like Figure 4 As shown, in specific applications, the lighting unit 6 includes a laterally arranged LED light 11 and a power cable 12. The LED light 11 is installed through a pre-drilled lighting hole in the sleeve 8. This lateral installation method not only avoids interfering with the light path but also evenly illuminates the crosshair reticle 2, making the crosshair reference lines clearly visible under various lighting conditions. The power cable 12 provides a stable power supply to the LED light 11, ensuring its normal operation. In actual operation, the operator can flexibly control the switching and brightness of the LED light 11 according to the intensity of ambient light to meet different observation needs.

[0034] Furthermore, the lens barrel 7 is mounted on the mounting base 14 with leveling screw holes, a design that greatly facilitates the installation and use of the entire probe receiving lens module. During installation, operators can precisely level the module using the leveling screw holes to ensure it is horizontal, thereby guaranteeing that the light propagation path within the module meets design requirements and improving test accuracy. During use, even if the module is subjected to slight vibration or external interference, adjustments can be made promptly using the leveling screw holes to restore the module to its optimal working condition.

[0035] In practical operation, when conducting performance simulation tests on the laser rangefinder, the receiving lens module of the probe is first installed in the lens barrel 7 on the mounting base 14 with leveling screw holes. The module is then leveled using the leveling screw holes to ensure stable installation, laying the foundation for accurate testing. Next, the side-mounted LED lights 11 of the illumination unit 6 are turned on. Powered by the power cable 12 and installed through the pre-drilled illumination holes on the sleeve 8, they provide illumination support for the crosshair reticle 2. This allows the operator to clearly see the crosshairs on the crosshair reticle 2 even in low-light environments or under complex lighting conditions. The crosshairs on the crosshair reticle 2 can then be used to calibrate the optical axis of the detector 4's transmitting end, improving alignment accuracy. For focusing, the operator can adjust the distance between the receiving lens group 1 and the detector 4 by rotating the sleeve 8, which is threadedly connected to the lens barrel 7, according to the needs of the simulated measurement scenario. The detector 4 is housed within the sleeve 8, and a set screw 10 is provided between the sleeve 8 and the lens barrel 7. After adjustment to the appropriate position, tightening the set screw 10 limits the rotational position of the sleeve 8, achieving precise focusing of the detector 4's emitting end and ensuring the accuracy of the test results. When a high-intensity beam is incident, the light attenuator 3 plays a crucial role. Located within the sleeve 8 between the crosshair reticle 2 and the detector 4, it attenuates the high-intensity beam, preventing damage to the detector 4 caused by the beam and ensuring the stability and reliability of the entire testing system. This allows for continuous and accurate simulation testing of the laser rangefinder performance. The coordinated operation of the entire probe receiving lens module effectively overcomes the limitations of existing technologies, improving the accuracy and efficiency of laser rangefinder simulation testing.

[0036] In summary, this invention, with its unique probe receiving lens module design, demonstrates outstanding advantages in the field of laser rangefinder performance simulation testing. Its innovative improvements in focusing control, detector protection, and observation benchmark optimization form an organic whole, providing comprehensive support for laser rangefinder performance testing.

[0037] In terms of focus control, this invention utilizes a focal length fine-tuning structure 5 to precisely adjust the focal length as needed, thereby achieving accurate matching of the focal lengths of the receiving lens group 1 and the detector 4. This enables precise focusing in simulated measurement scenarios, significantly improving the accuracy of test results. This improvement solves the problem of fixed spacing between the receiving lens group 1 and the detector 4 in existing technologies, making the testing process more flexible and accurate.

[0038] In terms of the hardware design of detector 4, the optical attenuator 3 effectively solves the problem of detector 4's vulnerability. When a high-intensity beam of light is incident on the receiving end of detector 4, the optical attenuator 3 can attenuate the beam, preventing detector 4 from being damaged by the high-intensity beam and improving the stability and reliability of the entire testing system;

[0039] Regarding the observation reference, to address the lack of illumination on the reticle 2, this module includes an illumination unit 6. This illumination unit 6 comprises a laterally arranged LED light 11 and a power cable 12, providing illumination support for the crosshair reticle 2. Even in low-light environments or under complex lighting conditions, it significantly improves the visual recognition of the crosshairs, thereby enhancing the operator's alignment accuracy and work efficiency, ensuring accurate simulation testing in various environments.

[0040] The lens barrel 7 is mounted on the mounting base 14 with leveling screw holes, which facilitates the leveling operation of the entire probe receiving lens module, ensuring the stability of the module during installation and use, and further improving the accuracy and reliability of the test.

[0041] In terms of routine maintenance, this probe receiving lens module also has certain advantages. The objective lens in the receiving lens group 1 is assembled in the lens barrel 7 via a retaining ring 13, which facilitates disassembly and cleaning, and can promptly remove dust and stains from the objective lens surface, ensuring its optical performance. The optical attenuator 3 and the LED illumination lamp 11 can also be replaced as needed to ensure their normal function.

[0042] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A probe receiving lens module based on laser rangefinder performance simulation testing, characterized in that: The system includes a receiving lens group, a crosshair reticle, an optical attenuator, and a detector, arranged sequentially along the optical path of the laser rangefinder under test. The emitting end of the detector uses the crosshair reference line of the crosshair reticle to complete the optical axis deviation calibration. Between the detector and the receiving lens group, a focal length fine-tuning structure is used to adjust the distance between them to fine-tune the focusing of the emitting end of the detector. An illumination unit is also provided relative to the crosshair reticle to provide illumination support.

2. The probe receiving lens module based on laser rangefinder performance simulation test according to claim 1, characterized in that: The objective lenses in the receiving lens assembly are respectively assembled in the lens barrel by retaining rings, and the cross-shaped reticle is provided at the tail end of the lens barrel.

3. The probe receiving lens module based on laser rangefinder performance simulation test according to claim 2, characterized in that: The focal length fine-tuning structure includes a sleeve that is threadedly connected to the lens barrel, and the detector is assembled inside the sleeve by means of a mounting plate; by rotating the sleeve, the distance between the receiving lens group and the detector can be adjusted; a set screw for limiting the rotation position of the sleeve is also provided between the sleeve and the lens barrel.

4. The probe receiving lens module based on laser rangefinder performance simulation test according to claim 3, characterized in that: A light attenuator is provided in the sleeve between the cross-shaped reticle and the detector.

5. The probe receiving lens module based on laser rangefinder performance simulation test according to claim 3 or 4, characterized in that: The lighting unit includes a side-arranged LED light and a power cable. The LED light is installed through a lighting hole reserved on the sleeve wall.

6. The probe receiving lens module based on laser rangefinder performance simulation test according to claim 5, characterized in that: The lens barrel is mounted on a mounting base with leveling screw holes.

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