Vertical double-camera and prism test sighting device center and parallax device

Abstract

The invention provides a vertical double-camera and prism testing sighting device center and parallax device. The vertical double-camera and prism testing sighting device center and parallax device comprises a light source, a collimator, a tested product placing area, a beam splitter prism, two vertically-arranged cameras, a light path polarization adjusting module and a dynamic target center generating module. According to the device, the camera is matched with the beam splitter prism, traditional camera movement detection is replaced, double-view-angle detection can be synchronously achieved without moving the camera, the single-time parallax test time is shortened, efficiency is improved, and the single-product detection time is shortened. The device integrates center alignment and parallax detection, can synchronously detect optical defects of the lens, does not need additional equipment, and reduces mechanical wear and maintenance cost. The beam splitter prism enables the double cameras to work in parallel to receive two light paths of the collimator, data of the double cameras are subjected to cross validation, and the result reliability is improved. The collimator simulates the target distance of 20-100m, and the detection meets the actual use requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of sight detection, and in particular relates to a device for testing the center and parallax of a sight using a vertical dual-camera plus prism. Background Art

[0002] As a precision-positioned optical aiming component, the center alignment accuracy and parallax control of the sight directly affect the positioning reliability during use. It is widely used in scenarios with extremely high precision requirements, such as firearms, bows and crossbows, and astronomical observations.

[0003] Due to the wide variety of products and high precision requirements, the current production and testing of sights is still mainly done manually. Only in a few scenarios are single-vision cameras used to replace manual operations to complete the visual inspection of the sight's center of gravity and the collimator's center of gravity.

[0004] Existing technology for parallax detection requires moving the camera to capture images from at least two different positions to complete the test, as parallax determination relies on comparing the relative positions of the bull's eye and the red dot from different viewing angles. This camera-moving detection method has significant drawbacks: First, parallax testing of a single product requires repeated camera movement 4-6 times, with a single test taking up to 2.5 seconds, resulting in extremely low overall testing efficiency and severely hindering the advancement of automated production. Second, mechanical vibration and positioning errors can easily introduce additional detection deviations during camera movement, and repeated movements can increase equipment wear and tear, increasing maintenance costs.

[0005] At the same time, existing visual inspection equipment can only achieve basic alignment judgment between the center of the target and the red dot, and cannot simultaneously complete additional functions such as lens optical defect detection (such as scratches and bubbles) and optical path stability verification. Additional inspection equipment is required, resulting in cumbersome production processes and high equipment investment costs.

[0006] In addition, problems such as ambient light interference and insufficient redundancy of image data captured by a single camera will further affect the reliability of the test results, making it difficult to meet the mass production testing needs of high-precision sights. Summary of the Invention

[0007] The object of the present invention is to provide a vertical dual-camera plus prism test sight center and parallax device to solve the problems raised in the above background technology.

[0008] In view of this, the present invention provides a vertical dual-camera plus prism test sight center and parallax device, including a light source, a parallel light tube, a product placement area to be tested, a beam splitter prism, two vertically arranged cameras, an optical path polarization adjustment module, and a dynamic bull's eye generation module.

[0009] The light source is used to provide illumination for the parallel light tube; The collimator is used to simulate a target distance of 20-100m and generate a reference bull's eye; The area where the product to be tested is placed is located on the optical path between the collimator and the beam splitter prism, and is used to place the sight to be tested; The beam splitter prism is used to split the light path generated by the collimator into two paths at 90 degrees vertically; The two cameras correspond to the two light paths separated by the beam splitter prism, respectively, and are used to observe the image information converted by the collimator to achieve the test of the center and parallax of the sight; The optical path polarization adjustment module includes an adjustable polarizer provided on the optical path between the collimator and the area where the product to be tested is placed. The adjustable polarizer is used to adjust the polarization direction of the light path incident on the sight to be tested, with an adjustment range of 0-90°, and the beam splitter prism is a polarization beam splitter prism adapted to the polarization adjustment; The dynamic bull's eye generation module is built into the parallel light tube and is a switchable dynamic bull's eye generation component. It is set in the internal light path of the parallel light tube and can generate reference bull's eyes of different shapes, sizes and dynamic movement. The bull's eye parameters can be adjusted in real time through the control system.

[0010] In the present invention, a further implementation scheme is that, of the two cameras, one camera is arranged in the horizontal direction to correspond to the horizontal light path separated by the beam splitter prism, and the other camera is arranged in the vertical direction to correspond to the vertical light path separated by the beam splitter prism, and the fields of view of the two cameras are converged to the center of the parallel light tube through the beam splitter prism.

[0011] In the present invention, a further embodiment is that it also includes a bracket, the dichroic prism is fixed on the bracket, one camera is installed at the rear end of the bracket, and the other camera is installed at the lower end of the bracket.

[0012] In the present invention, a further embodiment is that it also includes an image processing unit, which is connected to the two cameras and is used to receive image information taken by the cameras and perform analysis and processing to obtain test results of the center of the sight and parallax. The image processing unit can compare and analyze the positional relationship between the red dot of the sight and the reference bull's eye in the images obtained by the two cameras.

[0013] In the present invention, a further embodiment is that the reference bull's eye generated by the collimator and the red dot of the sight can be in the same field of view of two cameras, so that the cameras can capture the positions of the two.

[0014] In the present invention, a further embodiment is that the shooting angles of the two cameras cover the optical states of the sight in the horizontal and vertical directions, and can synchronously capture the optical defects of the sight lens in the horizontal and vertical directions.

[0015] In a further embodiment of the present invention, the beam splitter prism enables the two cameras to operate in parallel to receive the two light paths of the collimator.

[0016] In the present invention, a further embodiment is that the two cameras can generate two independent sets of image data for the same reference bull's eye and sight red dot, and compare the consistency of the two sets of data.

[0017] In the present invention, a further embodiment is that the parallel light tube generates a vertical simulated light path toward the dichroic prism, and the simulated light path passes through the dichroic prism and is received by two cameras. The simulated light path can pass through the sight under test to simulate the light path state when the sight is actually used.

[0018] In the present invention, a further embodiment is that the light source is a stable monochromatic light source, which can ensure that the reference bull's eye image produced by the collimator is clear and stable.

[0019] The beneficial effects of the present invention are: By using two vertically arranged cameras in conjunction with a dichroic prism, the traditional camera movement detection method is replaced. Synchronous detection of two perspectives can be achieved without moving the camera, reducing the time of a single parallax test from 2.5s to 0.5s, improving efficiency by 400%. For a single product that requires 4-6 parallax tests, the detection time can be shortened by 8-12s, effectively adapting to the efficient needs of automated production.

[0020] The device integrates center alignment and parallax detection functions, and the two vertically arranged cameras can synchronously complete the optical defect detection of the sight lens in the horizontal and vertical directions. There is no need for additional separate detection equipment, which reduces the equipment procurement cost; at the same time, it avoids the mechanical wear of the traditional camera moving structure and reduces the frequency and cost of equipment maintenance.

[0021] The beam splitter prism only allows the specific wavelength light beam generated by the collimator to pass through and refract to the two cameras, allowing the two cameras to work in parallel to receive the two light paths of the collimator, which can filter out ambient stray light interference and ensure image clarity; the two sets of independent image data generated by the two cameras can eliminate misjudgments caused by lens contamination of a single camera through cross-validation, thereby improving the reliability of the detection results.

[0022] The device can work with the image processing unit to automatically compare and analyze the positional relationship between the red dot and the reference target without manual intervention. This solves the problem of low efficiency and large errors in traditional manual visual inspection, and provides key testing support for the automated production of sights.

[0023] The collimator can simulate a target distance of 20-100m, simulate the light path passing through the sight under test, and restore the light path state when the sight is actually used, so that the test results are more in line with actual use needs and ensure the accuracy of the product after leaving the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of optical transmission of the present invention. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application are clearly described below. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field fall within the scope of protection of this application.

[0026] This embodiment provides a camera 4 plus a prism test sight center and parallax device, including a light source, a collimator 1, a product placement area 2 to be tested, a beam splitter prism 3, two vertically arranged cameras 4, an optical path polarization adjustment module, and a dynamic bull's eye generation module.

[0027] Among them, the light source is used to provide illumination for the collimator 1; the collimator 1 is used to simulate a target distance of 20-100m and generate a reference bull's eye; the product placement area 2 is located on the optical path 5 between the collimator 1 and the beam splitter prism 3, and is used to place the sight to be tested; the beam splitter prism 3 is used to split the optical path 5 generated by the collimator 1 into two paths at a vertical angle of 90 degrees; the two cameras 4 respectively correspond to the two optical paths 5 separated by the beam splitter prism 3, and are used to observe the image information converted by the collimator 1 to realize the test of the center and parallax of the sight.

[0028] Through the optical path 5 distribution function of the beam splitter prism 3, the single optical path 5 is converted into two perpendicular optical paths 5, so that the camera 4 can synchronously obtain images from two perspectives without moving, solving the inefficiency problem caused by the traditional "moving camera 4 to obtain multiple perspectives".

[0029] After the light source is activated, it provides illumination for collimator 1, which emits a light path 5 that simulates a long-distance scene and generates a reference bull's eye. Light path 5 first passes through the sight under test placed in the detection area (at this time, the red dot of the sight and the reference bull's eye form a superimposed image), and then enters the beam splitter prism 3 to be divided into two horizontal and vertical paths. The two light paths 5 are respectively received by two vertically arranged cameras 4, which convert the images into electrical signals and transmit them to subsequent units to complete center alignment and parallax detection.

[0030] It replaces the traditional camera movement detection mode, structurally reduces the time consumption of mechanical movements, and lays the foundation for efficient detection; at the same time, the integrated design reduces the space occupied by the equipment and adapts to the compact layout requirements of the production line.

[0031] To further enhance the stability of optical path 5, an adjustable iris, such as a manual iris with a diameter of 5-10mm, can be added between collimator 1 and the product placement area 2. By adjusting the iris aperture, the incident light beam on the collimator can be controlled to accommodate the inspection needs of lenses of varying sizes. When inspecting small-diameter lenses, reducing the iris aperture reduces stray light; when inspecting large-diameter lenses, increasing the aperture ensures full beam coverage. This design allows for compatibility with collimator lenses ranging from 10 to 50mm in diameter without requiring core component replacement, enhancing the versatility of the equipment and eliminating the need for traditional equipment to adapt to different product sizes.

[0032] In this embodiment, further, among the two cameras 4, one camera 4 is arranged in the horizontal direction to correspond to the horizontal light path 5 separated by the beam splitter prism 3, and the other camera 4 is arranged in the vertical direction to correspond to the vertical light path 5 separated by the beam splitter prism 3, and the fields of view of the two cameras 4 are converged to the center of the parallel light tube 1 through the beam splitter prism 3.

[0033] The optical properties of the beam splitter prism 3 can distribute the incident light path 5 at a 90-degree angle, ensuring that the horizontal and vertical cameras 4 can observe the same target from a vertical perspective; the field of view convergence design of the camera 4 avoids detection blind spots caused by perspective deviation.

[0034] After the optical path 5 of the collimator 1 enters the beam splitter prism 3, part of the light is refracted horizontally to the horizontal camera 4, and the other part of the light is refracted vertically to the vertical camera 4. Since the lens axes of the two cameras 4 are both pointed at the reference bull's eye after being calibrated by the optical path 5 of the beam splitter prism 3, the relative position relationship of the "reference bull's eye + sight red dot" in the horizontal and vertical directions can be captured synchronously, such as the horizontal red dot offset and the vertical red dot offset.

[0035] The vertical viewing angle covers the core detection dimension of the aimer, avoiding the problem of missed detection in a single viewing angle; at the same time, the synchronous shooting of camera 4 changes the parallax detection from "time-sharing completion" to "real-time synchronization", and the efficiency of single detection is increased by 400%.

[0036] In the above description, polarizing filters can be installed in front of the lenses of horizontal and vertical cameras 4, respectively, with the polarization directions of the two polarizing filters perpendicular to each other. When light path 5 passes through the sight lens, if the lens exhibits stress birefringence (e.g., lens deformation caused by assembly pressure), the polarized light's vibration direction will rotate, causing the grayscale values ​​of the image captured by camera 4 to exhibit regular variations. The image processing unit analyzes the magnitude of grayscale variations to quantify the stress distribution in the lens, thus achieving the additional functions of "parallax detection + stress detection." This solves the problem of traditional equipment failing to detect hidden stress in the lens during detection, leading to accuracy drift due to stress release during product use.

[0037] In this embodiment, a bracket 6 is further included, the beam splitter prism 3 is fixed on the bracket 6 , one camera 4 is installed at the rear end of the bracket 6 , and the other camera 4 is installed at the lower end of the bracket 6 .

[0038] The bracket 6 fixes the relative positions of the beam splitter prism 3 and the camera 4 through a mechanical structure, ensuring the stability of the propagation path of the optical path 5 and reducing detection errors caused by loose components.

[0039] The beam splitter prism 3 is fixed in the preset groove of the bracket 6 by bolts. The horizontal camera 4 is installed at the rear end of the bracket 6 (coaxial with the horizontal optical path 5 of the beam splitter prism 3) via a slide rail, and the vertical camera 4 is installed at the lower end of the bracket 6 (coaxial with the vertical optical path 5 of the beam splitter prism 3). During assembly, the position of the bracket 6 is adjusted using a calibration tool to ensure that the center of the camera 4 lens is aligned with the exit of the optical path 5 of the beam splitter prism 3, with the error controlled within 0.1mm.

[0040] The mechanical fixing structure improves the stability of the optical path 5 by 80%, avoiding the positioning deviation caused by vibration of the traditional mobile camera 4; at the same time, the standardized bracket 6 design reduces the difficulty of equipment assembly and shortens the debugging time by 50%.

[0041] In this embodiment, an image processing unit is further included, which is connected to the two cameras 4 and is used to receive image information taken by the cameras 4 and perform analysis and processing to obtain test results of the center of the sight and parallax. The image processing unit can compare and analyze the positional relationship between the red dot of the sight and the reference bull's eye in the images obtained by the two cameras 4.

[0042] Based on an image recognition algorithm, the image processing unit calculates the offset between the red dot and the center of the target through pixel coordinates to quantify the center alignment error. At the same time, it compares the offset data of camera 4 and calculates the disparity value (disparity = the vector difference between the horizontal offset and the vertical offset).

[0043] After the image data from camera 4 is transmitted to the image processing unit, the algorithm first identifies the reference bull's eye (as the reference point) and the red dot (as the detection point) through template matching. It then calculates the horizontal pixel offsets (e.g., ΔX1, ΔX2) and vertical pixel offsets (e.g., ΔY1, ΔY2) between the two. If the deviations between ΔX1 and ΔX2, and between ΔY1 and ΔY2, are within the threshold, the center alignment is determined to be satisfactory. Disparity detection calculates the offset difference under dual perspectives through vector synthesis and outputs the disparity value.

[0044] Therefore, this embodiment can replace the subjective judgment of manual visual inspection and control the center alignment error detection accuracy within 0.01mm; at the same time, the algorithm automatically analyzes and reduces human operation errors, and the detection consistency is improved to more than 99%.

[0045] In this embodiment, further, the reference bull's eye generated by the collimator 1 and the red dot of the sight can be in the same field of view of the two cameras 4, so that the cameras 4 can capture the positions of the two.

[0046] By adjusting the focal length of the collimator 1 and the lens parameters of the camera 4, the reference bull's eye and the red dot form a superimposed image in the imaging plane of the camera 4, ensuring that the positional relationship between the two can be observed simultaneously.

[0047] The collimator 1 images the reference bull's eye on the plane of the sight lens by adjusting the focal length. The red dot generated when the sight is powered on forms a superimposed image with the reference bull's eye. After the image is refracted by the beam splitter prism 3, it appears as a complete picture of "bull's eye + red dot" on the imaging sensor of the camera 4. The camera 4 uses the autofocus function to ensure that both are clearly imaged.

[0048] Avoiding secondary shooting caused by the bull's eye and the red dot not being in the same field of view reduces the number of detection steps; at the same time, the complete image provides complete data for subsequent algorithm analysis, avoiding calculation errors caused by image segmentation.

[0049] In this embodiment, further, the shooting angles of the two cameras 4 cover the optical states of the sight in the horizontal and vertical directions, and can synchronously capture the optical defects of the sight lens in the horizontal and vertical directions.

[0050] When the simulated light path 5 of the collimator 1 passes through the lens, if there are defects such as scratches or bubbles, it will cause the local light path 5 to be scattered or refracted abnormally, forming uneven light spots or shadows in the image of the camera 4.

[0051] When camera 4 captures the "bull's eye + red dot" image, it simultaneously captures the state of the optical path 5 at the edge and center area of ​​the lens - the horizontal camera 4 can detect scratches in the horizontal direction of the lens, such as scratches distributed along the X-axis, and the vertical camera 4 can detect bubbles in the vertical direction, such as bubbles distributed along the Y-axis; the image processing unit identifies abnormal areas through grayscale value analysis, such as areas where the grayscale mutation exceeds the preset threshold, and marks the defect location and size.

[0052] It realizes the three-in-one functions of "center alignment + parallax detection + defect detection" without the need for additional defect detection equipment, reducing equipment investment costs by 20%; at the same time, synchronous detection shortens the comprehensive inspection time of a single product by 30%.

[0053] In addition to the above solution, a ring light source (with the same wavelength as collimator 1, such as 635nm) can be added between collimator 1 and area 2 where the product under test is placed. The light from the ring light source is incident on the lens surface at a 45-degree angle. If the lens has surface scratches, the oblique light will produce diffuse reflections at the scratches, allowing camera 4 to capture a more distinct bright line. Furthermore, the image processing unit incorporates a defect classification model that can distinguish between scratches, bubbles, and uneven coatings. It automatically determines the defect type based on preset criteria and outputs a defect grade report. This design upgrades defect detection from "identification only" to "classification and grading," providing data support for production process optimization.

[0054] In this embodiment, the beam splitter prism 3 enables the two cameras 4 to operate in parallel to receive the two light paths 5 of the collimator 1 .

[0055] The coating layer of the beam splitter prism 3 has high transmittance only for the light beam of a specific wavelength (such as 635 nm) of the collimator 1 , and has high reflectivity for the stray wavelengths of ambient light (such as natural light, workshop lighting), thereby filtering out interfering light.

[0056] Collimator 1 emits a 635nm monochromatic light path 5. This light has a transmittance of ≥90% when passing through beam splitter prism 3 and is refracted to camera 4. After entering beam splitter prism 3, the workshop ambient light is reflected by the coating layer and cannot enter camera 4. The light received by camera 4 is mainly from collimator 1 light path 5, and the image signal-to-noise ratio is improved by 40%.

[0057] It solves the image blurring problem caused by ambient light in traditional equipment, and improves the edge recognition accuracy of the red dot and the bull's eye by 20%; at the same time, it reduces misjudgments caused by light interference, and the detection accuracy is increased to 99.5%.

[0058] In this embodiment, further, the two cameras 4 can generate two independent sets of image data for the same reference bull's eye and sight red dot, and compare the consistency of the two sets of data.

[0059] Two sets of data are generated by the independent imaging system of camera 4, and data redundancy is used to eliminate misjudgments caused by single device failure (such as lens contamination and sensor abnormality).

[0060] The horizontal camera 4 and the vertical camera 4 each output a set of image data. The image processing unit compares their core parameters, such as the center coordinate deviation of the bull's eye ≤ 1 pixel and the red dot offset deviation ≤ 0.01 mm. If the consistency meets the requirements, the data is considered valid. If the deviation exceeds the standard, the device self-check is triggered (such as lens cleaning prompts and optical path 5 calibration prompts).

[0061] Data cross-validation avoids the risk of "single point failure" and reduces the probability of defective products being released due to equipment problems. At the same time, the automatic self-inspection function reduces the frequency of manual inspections and lowers operation and maintenance costs.

[0062] In this embodiment, further, the collimator 1 generates a vertical simulated light path 5 directed toward the beam splitter prism 3. The simulated light path 5 passes through the beam splitter prism 3 and is received by two cameras 4. The simulated light path 5 can pass through the sight under test to simulate the state of the light path 5 when the sight is actually used.

[0063] The direction of the optical path 5 of the collimator 1 is consistent with the direction of the "target-lens-human eye" optical path 5 when the sight is actually used (vertical direction), ensuring that the propagation characteristics of the optical path 5 in the detection scene are consistent with those in the actual use scene.

[0064] Collimator 1 emits simulated light path 5 vertically downward, which first passes through the lens of the sight under test (simulating the process of "target light entering the lens" during actual use) and then enters beam splitter prism 3. The propagation path of light path 5 is completely consistent with the actual light path 5 of the sight installed on the firearm (such as vertically aiming at a long-distance target). The state of light path 5 captured by camera 4 can directly reflect the optical performance during actual use.

[0065] The consistency between test results and actual performance is improved by 60%, avoiding the problem of "qualified in the laboratory but failed in the field"; at the same time, real-scene simulation makes parallax correction more in line with actual needs, reducing aiming errors by 30% when users use it.

[0066] In this embodiment, further, the light source is a stable monochromatic light source, which can ensure that the reference bull's eye image generated by the collimator 1 is clear and stable.

[0067] Monochromatic light sources have high wavelength stability, such as laser light sources, and stable luminous intensity, which can avoid the distortion of the bull's eye image caused by light source fluctuations.

[0068] The light source uses a 635nm semiconductor laser, powered by a constant current source to ensure stable output power. The light passes through the collimating lens of the collimator 1 to form parallel light, generating a reference target with a clear edge, such as a cross target. Even during long-term operation, the grayscale value fluctuation of the target image for a time of 8 hours or more is still controlled within 5%.

[0069] The improved stability of the reference bull's eye reduces the detection error of the red dot offset by 15%. At the same time, the low divergence characteristics of the monochromatic light source ensure that the bull's eye size does not change significantly within the propagation distance of optical path 5 (simulating 20-100m), meeting the needs of long-distance target simulation.

[0070] This device utilizes a core design consisting of a beam splitter prism (3) and a camera (4), combined with optimized features such as a bracket (6), an anti-interference optical path (5), and real-world simulation. This device efficiently and effectively performs sight centering, parallax detection, and optical defect detection. Compared to traditional technologies, its key advantages include a 400% increase in efficiency, reducing single-shot detection time from 2.5 seconds to 0.5 seconds, a 30% increase in accuracy, a 20% reduction in costs, and a 60% improvement in reliability. This provides a high-precision, high-efficiency inspection solution for mass production of sights.

[0071] In this solution, the screening characteristics of the beam splitter 3 for light beams of specific wavelengths are combined with the synchronous shooting capability of the camera 4, which can unexpectedly realize the optical stability detection of the sight in different temperature environments: when the ambient temperature changes and causes the lens to expand and contract due to heat and cold, the stable light path 5 of the parallel light tube 1 passes through the lens, and the camera 4 will capture the slight offset change between the red dot and the reference center of the target. The image processing unit can determine the temperature adaptability of the lens material by analyzing the correlation data between the offset and temperature; at the same time, the mechanical fixing structure of the bracket 6 has extremely small deformation when the temperature changes, which can eliminate the interference of the equipment's own deformation on the detection, and solve the problem that traditional equipment cannot synchronously verify the temperature stability of the sight during the detection stage, providing an early verification basis for the reliability of the product in extreme temperature scenarios.

[0072] In this solution, the optical path polarization adjustment module includes an adjustable polarizer provided on the optical path 5 between the collimator 1 and the product placement area 2 to be tested. The adjustable polarizer is used to adjust the polarization direction of the optical path 5 incident on the tested sight, with an adjustment range of 0-90°, and the beam splitter prism 3 is a polarization beam splitter prism adapted to the polarization adjustment; the dynamic bull's eye generation module is built into the collimator 1 and is a switchable dynamic bull's eye generation component. It is provided in the optical path 5 inside the collimator 1 and can generate reference bull's eyes of different shapes, sizes and dynamic movement, and the bull's eye parameters can be adjusted in real time through the control system.

[0073] The light source provides illumination for the collimator 1. The initial light path 5 (non-polarized light or fixed polarized light) generated by the collimator 1 first enters the adjustable polarizer (located between the collimator 1 and the area 2 where the product to be tested is placed).

[0074] The adjustable polarizer is adjusted in angle (0-90°) by an electric rotating mechanism so that the transmitted light path 5 forms linearly polarized light with a specific polarization direction (such as 0°, 45°, 90°, etc.), and the polarized light passes through the lens of the sight under test.

[0075] The polarized light after passing through the sight lens enters the polarization splitting prism. The prism splits the polarized light that meets the conditions into two vertical light paths, horizontal and vertical, according to its own polarization selection characteristics, and transmits them to two vertically arranged cameras 4 respectively.

[0076] The camera 4 receives an image formed by polarized light, and the image processing unit analyzes the center alignment of the sight and the parallax condition based on the image data under the polarization state.

[0077] Therefore, it can produce several effects, namely filtering out ambient stray light interference: the polarization beam splitter prism only allows light beams in a specific polarization direction to pass through, which can effectively filter out ambient light in non-target polarization states, improve the image signal-to-noise ratio, make the edge of the red dot and the reference bull's eye clearer, and improve detection accuracy.

[0078] Detecting defects in the polarization characteristics of lenses: If the sight lens has stress birefringence (such as deformation caused by assembly pressure), the vibration direction of the polarized light will change, and the grayscale value of the image captured by Camera 4 will show regular changes. By analyzing the quantifiable stress distribution of the lens, hidden optical defects can be discovered in advance, avoiding accuracy drift caused by stress release during product use.

[0079] Adapt to sights with different polarization characteristics: By adjusting the angle of the polarizer, the polarization characteristics of different lens coatings can be matched, expanding the device's compatibility with different types of sights.

[0080] In addition, a dynamic bull's-eye generation module is built into the collimator 1. The core of the module is a switchable dynamic bull's-eye generation component (such as an LCD display panel, a rotatable target disk, or a digital micromirror array). The control system drives the component to change the physical parameters or motion state of the bull's-eye, simulating the target characteristics in different scenarios in actual use, so that the reference bull's-eye generated by the collimator 1 is closer to actual usage needs.

[0081] The dynamic bull's-eye generation module is integrated into the internal optical path 5 of the collimator 1. The light source shines on the dynamic bull's-eye generation component, which generates a bull's-eye with specific parameters according to the control system instructions: Switch between cross, circle, ring and other bull's eye patterns through the LCD display panel, or change physical target pieces of different shapes by rotating the target disk; The size of the bull's eye image can be changed by electronic zoom (LCD panel) or mechanical adjustment of the distance between the target disk and the lens; The target plate is driven to rotate / translate by a motor, or the moving trajectory is displayed on an LCD panel, so that the bull's eye moves along a straight line, curve, or other trajectory.

[0082] The generated dynamic bull's eye is collimated by the optical system of the collimator 1 to form a parallel light path 5 simulating a distance of 20-100m, passes through the sight under test, enters the beam splitter prism 3, and is finally captured by the camera 4.

[0083] The image processing unit compares the relative position changes between the dynamic bull's eye and the red dot of the sight, and analyzes the center alignment accuracy and parallax stability of the sight when tracking dynamic targets.

[0084] This then creates a simulation of real-world usage scenarios: breaking through the limitations of the traditional collimator1 with a fixed, static bull's eye, it can simulate moving targets or diverse targets, making the detection more in line with the actual usage needs of the sight in scenarios such as firearms, crossbows, and astronomical observations.

[0085] Testing the dynamic response performance of the sight: By analyzing the tracking accuracy of the red dot on the dynamic center of the target, the stability of the sight's optical system and mechanical structure in dynamic scenarios can be evaluated, making up for the defect that traditional static testing cannot reflect dynamic performance.

[0086] Automatic adaptation to detection needs: The control system adjusts the target parameters in real time, and the detection mode can be switched with one click, without the need for manual target replacement. This shortens the switching time between different detection items and improves batch detection efficiency.

[0087] Expanded testing dimensions: For example, by generating a bull's eye with gradually varying sizes, the center alignment consistency of the sight can be tested at different magnifications. By generating a bull's eye with an irregular shape, the positioning accuracy of the sight for non-standard targets can be evaluated, providing more comprehensive data support for product optimization.

[0088] The above embodiments are described. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A vertical dual-camera plus prism test sight center and parallax device, characterized in that: It includes a light source, a collimator, an area for placing the product to be tested, a beam splitter, two vertically arranged cameras, an optical path polarization adjustment module, and a dynamic bull's eye generation module; The light source is used to provide illumination for the parallel light tube; The collimator is used to simulate a target distance of 20-100m and generate a reference bull's eye; The area where the product to be tested is placed is located on the optical path between the collimator and the beam splitter prism, and is used to place the sight to be tested; The beam splitter prism is used to split the light path generated by the collimator into two paths at 90 degrees vertically; The two cameras correspond to the two light paths separated by the beam splitter prism, respectively, and are used to observe the image information converted by the collimator to achieve the test of the center and parallax of the sight; The optical path polarization adjustment module includes an adjustable polarizer provided on the optical path between the collimator and the area where the product to be tested is placed. The adjustable polarizer is used to adjust the polarization direction of the light path incident on the sight to be tested, with an adjustment range of 0-90°, and the beam splitter prism is a polarization beam splitter prism adapted to the polarization adjustment; The dynamic bull's eye generation module is built into the parallel light tube and is a switchable dynamic bull's eye generation component. It is set in the internal light path of the parallel light tube and can generate reference bull's eyes of different shapes, sizes and dynamic movement. The bull's eye parameters can be adjusted in real time through the control system.

2. A vertical dual-camera plus prism test sight center and parallax device according to claim 1, characterized in that: Of the two cameras, one is arranged horizontally to correspond to the horizontal light path separated by the beam splitter prism, and the other is arranged vertically to correspond to the vertical light path separated by the beam splitter prism, and the fields of view of the two cameras are converged to the center of the collimator through the beam splitter prism.

3. A vertical dual-camera plus prism test sight center and parallax device according to claim 2, characterized in that: It also includes a bracket, the splitter prism is fixed on the bracket, one camera is installed at the rear end of the bracket, and the other camera is installed at the lower end of the bracket.

4. A vertical dual-camera plus prism test sight center and parallax device according to claim 3, characterized in that: It also includes an image processing unit, which is connected to the two cameras and is used to receive image information taken by the cameras and perform analysis and processing to obtain test results of the center of the sight and parallax. The image processing unit can compare and analyze the positional relationship between the red dot of the sight and the reference bull's eye in the images obtained by the two cameras.

5. A vertical dual-camera plus prism test sight center and parallax device according to claim 4, characterized in that: The reference bull's eye generated by the collimator and the red dot of the sight can be in the same field of view of the two cameras, so that the cameras can capture the positions of the two.

6. A vertical dual-camera plus prism test sight center and parallax device according to claim 5, characterized in that: The shooting angles of the two cameras cover the optical states of the sight in the horizontal and vertical directions, and can synchronously capture the optical defects of the sight lens in the horizontal and vertical directions.

7. A vertical dual-camera plus prism test sight center and parallax device according to claim 6, characterized in that: The beam splitter prism enables the two cameras to operate in parallel to receive the two light paths of the parallel light tube.

8. A vertical dual-camera plus prism test sight center and parallax device according to claim 7, characterized in that: The two cameras can generate two independent sets of image data for the same reference bull's eye and sight red dot, and compare the consistency of the two sets of data.

9. A vertical dual-camera plus prism test sight center and parallax device according to claim 8, characterized in that: The collimator generates a vertical simulated light path directed toward the beam splitter prism. The simulated light path passes through the beam splitter prism and is received by two cameras. The simulated light path can pass through the sight under test to simulate the light path state of the sight when it is actually used.

10. A vertical dual-camera plus prism test sight center and parallax device according to claim 9, characterized in that: The light source is a stable monochromatic light source, which can ensure that the reference bull's eye image produced by the collimator is clear and stable.

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