Optical axis calibration method and device, equipment and storage medium

Abstract

The invention discloses an optical axis calibration method, device and equipment and a storage medium, and relates to the technical field of optical equipment calibration, the method is applied to the optical axis calibration equipment, and the method comprises the following steps: adjusting an irradiation angle of a laser collimator until it is detected that an emergent light path of the laser collimator coincides with a reflected light path of the laser collimator, the reflection light path is obtained by reflecting the emergent light path through a reflector; controlling the laser collimator to directly irradiate to the target camera, and obtaining a light spot of an emergent light path on the target camera; adjusting the angle of the target camera until the light spot coincides with the sensor center of the target camera; respectively adjusting the horizontal displacement of the laser collimator and the target camera, enabling the emergent light path to pass through the perforated device with the preset aperture, and completing the calibration of the central optical axis when the light spot is detected to coincide with the center of the sensor of the target camera. According to the invention, the error of the product gold sample is eliminated in the calibration process, and the actual truth value of the target camera can be obtained, so that the accuracy of optical axis calibration is improved.

Description

Technical Field

[0001] The present application relates to the technical field of optical device calibration, and in particular to an optical axis calibration method, device, equipment and storage medium. Background Art

[0002] As the field of view of modules in the current VR field continues to increase, the demand for performance testing of product edge angles is becoming increasingly higher. The most basic method for measuring the edge angles of test equipment and assembly equipment is to calibrate the optical axis.

[0003] When calibrating the optical axis, a product gold sample is often used for calibration. The optical axis of the edge field of view is calibrated with an ideal product, and all subsequent tests are measured with the product as the benchmark. However, when using a product gold sample for field of view calibration, due to the manufacturing differences or characteristic deviations that may exist in the product gold sample itself, these differences will be brought into the calibration process, thereby affecting the accuracy and reliability of the calibration, and the true value of the product cannot be measured.

[0004] In summary, how to improve the accuracy of product optical axis calibration has become a problem that needs to be solved urgently in this field.

[0005] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0006] The main purpose of this application is to provide an optical axis calibration method, device, equipment and storage medium, aiming to solve the technical problem of how to improve the accuracy of product optical axis calibration.

[0007] To achieve the above-mentioned purpose, the present application proposes an optical axis calibration method, which is applied to an optical axis calibration device, wherein the optical axis calibration device comprises: a laser collimator, a reflector, a profiling tool and a hole device, wherein the reflector and the hole device are arranged on the profiling tool, and the laser collimator, the profiling tool and the target camera are arranged in sequence from bottom to top;

[0008] The method comprises:

[0009] Adjusting the irradiation angle of the laser collimator until it is detected that the outgoing light path of the laser collimator coincides with the reflected light path of the laser collimator, wherein the reflected light path is obtained by reflecting the outgoing light path through the reflector;

[0010] Controlling the laser collimator to directly irradiate a target camera, and obtaining a light spot of the outgoing light path on the target camera;

[0011] Adjusting the angle of the target camera until the light spot coincides with the sensor center of the target camera;

[0012] The horizontal displacement of the laser collimator and the target camera is adjusted respectively so that the outgoing light path passes through a perforated device with a preset aperture, and when it is detected that the light spot coincides with the sensor center of the target camera, the central optical axis calibration is completed.

[0013] In one embodiment, the optical axis calibration device further comprises: an aperture and a slide, wherein the aperture is arranged between the laser collimator and the profiling tooling, and the laser collimator is arranged on the slide;

[0014] Before the step of adjusting the setting angle of the laser collimator, the method further includes:

[0015] Adjusting the rotation angle of the aperture with the center of the aperture as the rotation point, wherein the rotation angle is the edge angle of the target camera to be measured;

[0016] The setting angle of the laser collimator is adjusted by the slide table so that the setting angle is the same as the rotation angle.

[0017] In one embodiment, the profiling tool is an axially rotatable structure, and the profiling tool is provided with a plurality of non-overlapping setting positions in the vertical direction; before the step of adjusting the irradiation angle of the laser collimator, the method further includes:

[0018] The contour tooling is controlled to rotate at a first preset angle so that a first setting position in each setting position where the reflector is installed is in a straight line with the laser collimator and the target camera in a vertical direction.

[0019] In one embodiment, before the step of controlling the laser collimator to directly irradiate the target camera, the method further includes:

[0020] The contouring tool is controlled to rotate to a second preset angle so that a second vacant setting position in each setting position is in a straight line with the laser collimator and the target camera in the vertical direction.

[0021] In one embodiment, before the step of respectively adjusting the horizontal displacement of the laser collimator and the target camera, the method further includes:

[0022] The profiling tool is controlled to rotate a third preset angle so that a third setting position in each setting position where the hole device is installed is in a straight line with the laser collimator and the target camera in the vertical direction.

[0023] In one embodiment, the optical axis calibration device further includes: a collection camera; after the step of adjusting the illumination angle of the laser collimator, the method further includes:

[0024] Acquire the optical path image of the laser collimator through the acquisition camera;

[0025] Identifying an outgoing light path of the laser collimator and a reflected light path of the laser collimator in the light path picture;

[0026] Determine whether the outgoing light path and the reflected light path coincide with each other.

[0027] In one embodiment, the step of obtaining the light spot of the outgoing light path on the target camera includes:

[0028] Acquire the light spot image of the target camera by the acquisition camera;

[0029] Identify whether the light spot in the light spot picture coincides with the sensor center of the target camera.

[0030] In addition, to achieve the above-mentioned purpose, the present application also proposes an optical axis calibration system, the system is arranged in an optical axis calibration device, the optical axis calibration device comprises: a laser collimator, a reflector, a profiling tool and a hole device, the reflector and the hole device are arranged on the profiling tool, the laser collimator, the profiling tool and the target camera are arranged in sequence from bottom to top;

[0031] The system comprises:

[0032] A verticality calibration module, used for adjusting the irradiation angle of the laser collimator until it is detected that the outgoing light path of the laser collimator coincides with the reflected light path of the laser collimator, wherein the reflected light path is obtained by reflecting the outgoing light path through the reflector;

[0033] A center calibration module, used to control the laser collimator to directly irradiate the target camera, obtain the light spot of the outgoing light path on the target camera; adjust the angle of the target camera until the light spot coincides with the sensor center of the target camera;

[0034] The horizontal plane calibration module is used to adjust the horizontal displacement of the laser collimator and the target camera respectively, so that the outgoing light path passes through a perforated device with a preset aperture, and when it is detected that the light spot coincides with the sensor center of the target camera, the central optical axis calibration is completed.

[0035] In addition, to achieve the above-mentioned purpose, the present application also proposes an optical axis calibration device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the optical axis calibration method described above.

[0036] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the optical axis calibration method described above are implemented.

[0037] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the optical axis calibration method described above are implemented.

[0038] The present application provides an optical axis calibration method, which is provided with a laser collimator and a reflector. Whether the laser collimator and the profiling tooling are vertical is detected by detecting whether the outgoing light path of the laser collimator and the reflected light path after reflection by the reflector coincide with each other. Then the laser collimator is directed directly to the target camera to be calibrated, and it is detected whether the light spot formed by the outgoing light path on the camera coincides with the sensor of the camera. After coincidence, a small hole of a preset aperture is set on the profiling tooling to constrain the range of the outgoing light path. The position of the laser collimator and the camera is adjusted horizontally so that the outgoing light path forms a light spot at the center of the camera sensor through the small hole, thereby making the camera, the small hole and the outgoing light path coaxial, and completing the calibration of the central optical axis.

[0039] In summary, the present application calibrates the central optical axis of the target camera through a laser collimator, a reflector and a perforated device. Compared with the solution of calibration through a product gold sample, the present application eliminates the error of the product gold sample during the calibration process and can obtain the actual true value of the target camera, thereby improving the accuracy of the optical axis calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 A schematic diagram of a flow chart provided for the first embodiment of the optical axis calibration method of the present application;

[0043] Figure 2 This is a schematic diagram of a first scenario involved in the first embodiment of the optical axis calibration method of the present application;

[0044] Figure 3 This is a schematic diagram of a second scenario involved in the first embodiment of the optical axis calibration method of the present application;

[0045] Figure 4 This is a schematic diagram of a third scenario involved in the first embodiment of the optical axis calibration method of the present application;

[0046] Figure 5 This is a schematic diagram of a fourth scenario involved in the second embodiment of the optical axis calibration method of the present application;

[0047] Figure 6 This is a schematic diagram of a fifth scenario involved in the second embodiment of the optical axis calibration method of the present application;

[0048] Figure 7 This is a schematic diagram of the module structure of the optical axis calibration system according to an embodiment of the present application;

[0049] Figure 8 Schematic diagram of the device structure of the hardware operating environment involved in the optical axis calibration method in the embodiment of the present application.

[0050] Label:

[0051] Description of Figure Numbers:

[0052] 01. Laser collimator; 02. Reflector; 03. Profiling tooling; 04. Perforated device; 05. Target camera; 06. Aperture; 07. Slide.

[0053] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0054] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0055] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0056] The main solution of the embodiment of the present application is: adjust the irradiation angle of the laser collimator until it is detected that the outgoing light path of the laser collimator coincides with the reflected light path of the laser collimator, wherein the reflected light path is obtained by reflecting the outgoing light path through the reflector; control the laser collimator to directly irradiate the target camera to obtain the light spot of the outgoing light path on the target camera; adjust the angle of the target camera until the light spot coincides with the sensor center of the target camera; adjust the horizontal displacement of the laser collimator and the target camera respectively, so that the outgoing light path passes through a perforated device with a preset aperture, and completes the central optical axis calibration when it is detected that the light spot coincides with the sensor center of the target camera.

[0057] As the field of view of modules in the current VR field continues to increase, the demand for performance testing of product edge angles is becoming increasingly higher. The most basic method for measuring the edge angles of test equipment and assembly equipment is to calibrate the optical axis.

[0058] When calibrating the optical axis, a product gold sample is often used for calibration. The optical axis of the edge field of view is calibrated with an ideal product, and all subsequent tests are measured with the product as the benchmark. However, when using a product gold sample for field of view calibration, due to the manufacturing differences or characteristic deviations that may exist in the product gold sample itself, these differences will be brought into the calibration process, thereby affecting the accuracy and reliability of the calibration, and the true value of the product cannot be measured.

[0059] In summary, how to improve the accuracy of product optical axis calibration has become an urgent problem to be solved in this field. In response to the above problems, the present application provides an optical axis calibration method, which is provided with a laser collimator and a reflector. The laser collimator and the profiling tooling are detected to be vertical by detecting whether the outgoing light path of the laser collimator and the reflected light path after reflection by the reflector are coincident. Then the laser collimator is directed to the target camera to be calibrated to detect whether the light spot formed by the outgoing light path on the camera coincides with the camera sensor. After coincidence, a small hole of a preset aperture is set on the profiling tooling to constrain the range of the outgoing light path, and the position of the laser collimator and the camera is adjusted horizontally so that the outgoing light path forms a light spot at the center of the camera sensor through the small hole, thereby making the camera, the small hole and the outgoing light path coaxial and completing the calibration of the central optical axis.

[0060] In summary, the present application calibrates the central optical axis of the target camera through a laser collimator, a reflector and a perforated device. Compared with the solution of calibration through a product gold sample, the present application eliminates the error of the product gold sample during the calibration process and can obtain the actual true value of the target camera, thereby improving the accuracy of the optical axis calibration.

[0061] In this embodiment, for the convenience of description, the optical axis calibration device is used as the execution subject for explanation below.

[0062] Based on this, the embodiment of the present application provides an optical axis calibration method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the optical axis calibration method of the present application.

[0063] In this embodiment, the method is applied to an optical axis calibration device, which includes: a laser collimator 01, a reflector 02, a profiling tool 03 (not shown in the figure) and a hole device 04, wherein the reflector 02 and the hole device 04 are arranged on the profiling tool 03, and the laser collimator 01, the profiling tool 03 and the target camera 05 are arranged in sequence from bottom to top;

[0064] The optical axis calibration method comprises steps S10 to S40:

[0065] Step S10, adjusting the irradiation angle of the laser collimator 01 until it is detected that the outgoing light path of the laser collimator 01 coincides with the reflected light path of the laser collimator 01, wherein the reflected light path is obtained by reflecting the outgoing light path through the reflector 02;

[0066] It should be noted that, in this embodiment, the laser collimator 01 is a six-axis adjustable laser collimator 01, which uses a laser beam to detect the relative position of the measured object in the horizontal and vertical directions. The characteristic of this laser collimator 01 is its six-axis adjustment function, which means that it can be adjusted in six different directions to ensure the precise alignment of the laser beam. The laser collimator 01 is usually composed of three major parts: a transmitting system with a laser as a light source, a photoelectric receiving system, and accessories. The laser beam generated by the laser is processed by the optical system to form a parallel and stable reference beam. This beam is used as a reference axis for measurement to calibrate a straight line or check the straightness of a guide rail, etc.

[0067] In this embodiment, please refer to Figure 2 , Figure 2 This is a schematic diagram of a first scenario involved in the first embodiment of the optical axis calibration method of the present application, such as Figure 2 As shown, the laser collimator 01, the reflector 02 and the target camera 05 are arranged in a vertical direction. First, the operation of adjusting the irradiation angle of the laser collimator 01 is performed. The purpose of this step is to ensure that the outgoing light path of the laser collimator 01 completely coincides with the reflected light path after being reflected by the reflector 02. By adjusting in the six-axis direction, the angle of the laser collimator 01 is gradually adjusted, and the coincidence of the reflected light path and the outgoing light path is monitored at the same time until the two are perfectly aligned.

[0068] In addition, an aperture 06 may be provided between the profiling tool 03 and the laser collimator 01 to constrain the optical path and further improve the accuracy of calibration.

[0069] Step S20, controlling the laser collimator 01 to directly irradiate the target camera 05, and obtaining the light spot of the outgoing light path on the target camera 05;

[0070] In this embodiment, please refer to Figure 3 , Figure 3 This is a schematic diagram of a second scenario involved in the first embodiment of the optical axis calibration method of the present application. Figure 3As shown, after the laser collimator 01 and the profiling tooling 03 are vertically calibrated, the reflector 02 is then removed, and the laser collimator 01 is controlled to be directed directly to the target camera 05. At this time, the outgoing light path of the laser collimator 01 will form a light spot on the photosensitive surface of the target camera 05. By capturing this light spot, the system can further analyze the position information of the light spot.

[0071] Step S30, adjusting the angle of the target camera 05 until the light spot coincides with the sensor center of the target camera 05;

[0072] In this embodiment, after obtaining the light spot position, the system starts to adjust the angle of the target camera 05. By fine-tuning the angle of the camera, the direction of the target camera 05 is gradually adjusted until the light spot completely coincides with the sensor center of the target camera 05. The completion of this step indicates that the optical axis of the target camera 05 has been preliminarily aligned with the outgoing light path of the laser collimator 01.

[0073] Step S40, respectively adjusting the horizontal displacement of the laser collimator 01 and the target camera 05, so that the outgoing light path passes through the hole device 04 with a preset aperture, and when it is detected that the light spot coincides with the sensor center of the target camera 05, the central optical axis calibration is completed.

[0074] It should be noted that, in this embodiment, the preset aperture of the hole device 04 can be set according to actual needs. As an example, the aperture of the hole device 04 can be set to 1 mm.

[0075] In this embodiment, please refer to Figure 4 , Figure 4 This is a schematic diagram of a third scenario involved in the first embodiment of the optical axis calibration method of the present application, such as Figure 4 As shown, finally, a hole device 04 with a preset aperture is set on the profiling tooling 03, and the system adjusts the horizontal displacement of the laser collimator 01 and the target camera 05 respectively, so that the outgoing light path of the laser collimator 01 can pass through a hole device 04 with a preset aperture, forming a light spot on the camera, and after adjustment, the light spot always coincides with the sensor center of the target camera 05. When the system detects that this condition is met, it is considered that the central optical axis calibration is completed.

[0076] In summary, through the above steps, the system can efficiently and accurately complete the calibration of the central optical axis, providing reliable guarantee for subsequent measurement, positioning and monitoring tasks.

[0077] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. On this basis, the optical axis calibration device also includes: an aperture 06 and a slide 07, the aperture 06 is arranged between the laser collimator 01 and the profiling tooling 03, and the laser collimator 01 is arranged on the slide 07;

[0078] Before the above step S10, the method may further include steps A10 to A20:

[0079] Step A10, adjusting the rotation angle of the aperture 06 with the center of the aperture 06 as the rotation point, wherein the rotation angle is the edge angle to be measured by the target camera 05;

[0080] It should be noted that in this embodiment, it is a device used to limit the range and direction of light propagation in the optical system. The aperture is divided into an aperture aperture and a field aperture. The aperture aperture is the aperture that limits the imaging light beam the most in the optical system, also known as the effective aperture. Its position and the size of the light hole have a direct relationship with the brightness, clarity and size of certain aberrations of the image formed by the optical system. The field aperture is the aperture that limits the field of view (i.e., the range of the object plane that can be imaged) the most.

[0081] In addition, there are other types of apertures such as vignetting apertures and stray light diaphragms, which also play an important role in the optical system.

[0082] The aperture can be used to limit the light beam. By adjusting the size and shape of the aperture, the amount and direction of light passing through the optical system can be controlled, thereby limiting the light beam; the aperture can also limit the imaging range, that is, the size of the field of view. By adjusting the position and size of the aperture, the imaging range of the optical system can be changed. The aperture can also intercept light that deviates from the ideal position, reduce stray light and aberrations, and thus improve the imaging quality of the optical system.

[0083] In laser technology, the aperture is used to control the shape and propagation direction of the laser beam. By adjusting the position and shape of the aperture, the laser beam can be adjusted and controlled to meet the needs of different application scenarios.

[0084] In this embodiment, please refer to Figure 5 , Figure 5 This is a schematic diagram of a fourth scenario involved in the second embodiment of the optical axis calibration method of the present application, such as Figure 5As shown, before the formal central optical axis calibration, the system first takes the center of the aperture 06 as the rotation point and adjusts the rotation angle of the aperture 06. The rotation angle here is determined according to the edge angle to be measured by the target camera 05. As an important optical element, the adjustment of the rotation angle of the aperture 06 can affect the direction of the laser light passing through. By accurately adjusting the rotation angle of the aperture 06, the system can ensure that the laser light can propagate along the predetermined path in the subsequent steps.

[0085] Step A20, adjusting the setting angle of the laser collimator 01 through the slide 07 so that the setting angle is the same as the rotation angle.

[0086] It should be noted that, in this embodiment, the slide 07 is a sliding platform with an arc, and the laser collimator 01 can slide on the slide 07 to adjust the setting angle of the laser collimator 01.

[0087] In this embodiment, please refer to Figure 6 , Figure 6 This is a schematic diagram of the fifth scenario involved in the second embodiment of the optical axis calibration method of this application, such as Figure 6 As shown, after adjusting the aperture 06, the system then adjusts the setting angle of the laser collimator 01 through the slide 07. The setting angle here needs to be the same as the rotation angle of the aperture 06. As a precise displacement control device, the slide 07 can ensure that the setting angle of the laser collimator 01 is accurately adjusted. By adjusting the setting angle of the laser collimator 01, the system can ensure that the laser light can match the direction of the aperture 06 after rotation when it is emitted, providing an accurate reference for the subsequent calibration steps.

[0088] Through the above steps, the optical axis of the edge field of view of the camera can be calibrated through the rotatable aperture 06. Moreover, according to the angle of the aperture, the optical axis calibration of the edge field of view angle can be gradually reduced, so that the optical axis of the camera is more accurate.

[0089] Based on the first embodiment and / or the second embodiment of the present application, in the third embodiment of the present application, the same or similar contents as those in the first embodiment and / or the second embodiment can be referred to the above description, and will not be described in detail later. On this basis, the profiling tool 03 is an axially rotatable structure, and the profiling tool 03 is provided with a plurality of non-overlapping setting positions in the vertical direction; before the above step S10, the method can also include step B10:

[0090] Step B10, controlling the contour tooling 03 to rotate to a first preset angle, so that the first setting position where the reflector 02 is installed among the setting positions is in a straight line with the laser collimator 01 and the target camera 05 in the vertical direction.

[0091] It should be noted that, in this embodiment, the first preset angle is an angle set according to the actual installation position.

[0092] In this embodiment, the contour tooling 03 has a rotating axis in the vertical direction and can rotate axially. On the axis, a plurality of setting positions for installing other workpieces are arranged, and each setting position does not overlap in the vertical direction, so the installed workpieces will not overlap. When the reflector 02 is needed, the contour tooling 03 is controlled to rotate to a first angle so that the installed reflector 02 is in a straight line with the laser collimator 01 and the target camera 05 in the vertical direction.

[0093] Furthermore, in a feasible implementation manner, before the above step S20, the method may further include step B20:

[0094] Step B20, controlling the contour tooling 03 to rotate to a second preset angle, so that the second vacant setting position in each setting position is in a straight line with the laser collimator 01 and the target camera 05 in the vertical direction.

[0095] In this embodiment, similarly, in order to allow the outgoing light path of the laser collimator 01 to directly reach the target camera 05, it needs to be rotated to an empty setting position.

[0096] The main purpose of this step is to rotate the profiling fixture so that the second setting position (which may be the position for installing the part to be calibrated) that was originally vacant is in a straight line with the laser collimator and the target camera in the vertical direction. This adjustment helps to ensure that the laser light can accurately pass through the second setting position and then be captured by the target camera as a clear light spot, providing an accurate reference for subsequent calibration work.

[0097] Furthermore, in a feasible implementation manner, before the above step S40, the method may further include step B30:

[0098] Step B30, controlling the contour tooling 03 to rotate to a third preset angle, so that the third setting position where the hole device 04 is installed in each setting position is in a straight line with the laser collimator 01 and the target camera 05 in the vertical direction.

[0099] Similarly, in order to allow the outgoing light path of the laser collimator 01 to pass through the perforated device 04 with a preset aperture, the perforated device 04 is rotated to be in a straight line with the laser collimator 01 and the target camera 05 in the vertical direction.

[0100] The core purpose of this step is to ensure that the third setting position where the hole device (which may be an optical element used for calibration or testing) is installed is in a straight line with the laser collimator and the target camera in the vertical direction by adjusting the rotation angle of the profiling fixture. Such adjustment helps the laser light to accurately pass through the hole device and form a clear light spot on the target camera, providing an accurate reference point for subsequent optical axis calibration.

[0101] By setting the rotating contour tooling 03, the automation of the entire process can be improved and possible errors caused by manual operation can be reduced.

[0102] Through the above steps, the entire test and calibration process can be automated, which reduces labor costs and possible errors caused by labor, thereby further improving the accuracy of calibration.

[0103] Based on the first to third embodiments of the present application, in the fourth embodiment of the present application, the same or similar contents as those of the first to third embodiments can be referred to the above description and will not be repeated later. On this basis, the optical axis calibration device also includes: a collection camera; after the step of adjusting the illumination angle of the laser collimator 01 in the above step S10, the method can also include steps C10 to C30:

[0104] Step C10, acquiring the optical path image of the laser collimator 01 through the acquisition camera;

[0105] It should be noted that in this embodiment, in the optical axis calibration device, the acquisition camera plays a vital role. It is responsible for capturing the optical path image of the laser collimator 01 and providing necessary image data for subsequent identification, analysis and judgment. The acquisition camera usually has the characteristics of high resolution, high sensitivity and fast response, and can accurately capture the subtle changes of the laser light, thereby ensuring the accuracy and reliability of the calibration process.

[0106] In this embodiment, after adjusting the irradiation angle of the laser collimator 01, the system acquires the optical path image of the laser collimator 01 through the acquisition camera. The acquisition camera transmits the captured optical path image to the system for use in subsequent steps. By acquiring the optical path image through the acquisition camera, the system can understand the state of the laser light in real time, providing intuitive and accurate image data for subsequent analysis and judgment. This helps to reduce the subjectivity of human judgment and improve the objectivity and accuracy of the calibration process.

[0107] Step C20, identifying the outgoing light path of the laser collimator 01 and the reflected light path of the laser collimator 01 in the light path picture;

[0108] In this embodiment, after acquiring the light path picture, the system starts to identify the outgoing light path and the reflected light path of the laser collimator 01 in the light path picture. The system analyzes the light path picture through an image processing algorithm to extract information of the outgoing light path and the reflected light path.

[0109] Step C30, determining whether the outgoing light path and the reflected light path coincide with each other.

[0110] In this embodiment, after the identification of the outgoing light path and the reflected light path is completed, the system starts to determine whether the two coincide. By comparing the position information of the outgoing light path and the reflected light path, it is determined whether they are on the same path. If the two coincide, it means that the irradiation angle of the laser collimator 01 has been adjusted in place, and the subsequent calibration steps can be performed; if the two do not coincide, it is necessary to continue to adjust the irradiation angle of the laser collimator 01 until the two coincide.

[0111] Further, in a feasible implementation manner, the step of obtaining the light spot of the outgoing light path on the target camera 05 in the above step S20 includes steps S21 to S22:

[0112] Step S21, collecting the light spot image of the target camera 05 by the collection camera;

[0113] In this embodiment, in order to obtain the light spot of the outgoing light path of the laser collimator 01 on the target camera 05, the light spot image of the target camera 05 is obtained by using a collection camera.

[0114] Step S22 , identifying whether the light spot in the light spot image coincides with the sensor center of the target camera 05 .

[0115] In this embodiment, after the light spot image is collected, the key features of the light spot image, such as the centroid position of the light spot, are first extracted, and then compared with the sensor center position of the target camera 05 to determine whether the light spot coincides with the sensor center of the target camera 05. In this way, it is determined whether the calibration of the optical axis is completed.

[0116] Through the above steps, the image is collected by the acquisition camera, and then the image is recognized according to the image processing algorithm. Compared with observing the light path and light spot with the human eye, the recognition accuracy of the light path and light spot can be improved, thereby improving the accuracy of calibration.

[0117] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the optical axis calibration method of the present application. More simple transformations based on this technical concept are all within the protection scope of the present application.

[0118] This application also provides an optical axis calibration system, please refer to Figure 7The optical axis calibration system is arranged on the optical axis calibration device, and the optical axis calibration device comprises: a laser collimator 01, a reflector 02, a profiling tool 03 and a hole device 04, wherein the reflector 02 and the hole device 04 are arranged on the profiling tool 03, and the collimator, the profiling tool 03 and the target camera 05 are arranged in sequence from bottom to top; the optical axis calibration system comprises:

[0119] A verticality calibration module 10 is used to adjust the irradiation angle of the laser collimator 01 until it is detected that the outgoing light path of the laser collimator 01 coincides with the reflected light path of the laser collimator 01, wherein the reflected light path is obtained by reflecting the outgoing light path through the reflector 02;

[0120] The center calibration module 20 is used to control the laser collimator 01 to directly irradiate the target camera 05, obtain the light spot of the outgoing light path on the target camera 05; adjust the angle of the target camera 05 until the light spot coincides with the sensor center of the target camera 05;

[0121] The horizontal plane calibration module 30 is used to adjust the horizontal displacement of the laser collimator 01 and the target camera 05 respectively, so that the outgoing light path passes through the hole device 04 with a preset aperture, and when it is detected that the light spot coincides with the sensor center of the target camera 05, the central optical axis calibration is completed.

[0122] Optionally, the optical axis calibration device further includes: an aperture 06 and a slide 07, wherein the aperture 06 is arranged between the laser collimator 01 and the profiling tool 03, and the laser collimator 01 is arranged on the slide 07; the optical axis calibration system is also used for:

[0123] The rotation angle of the aperture 06 is adjusted with the center of the aperture 06 as the rotation point, wherein the rotation angle is the edge angle to be measured by the target camera 05;

[0124] The setting angle of the laser collimator 01 is adjusted by the slide 07 so that the setting angle is the same as the rotation angle.

[0125] Optionally, the profiling tool 03 is an axially rotatable structure, and the profiling tool 03 is provided with a plurality of non-overlapping setting positions in the vertical direction; the optical axis calibration system is also used for:

[0126] The contour tooling 03 is controlled to rotate to a first preset angle so that the first setting position where the reflector 02 is installed in each setting position is in a straight line with the laser collimator 01 and the target camera 05 in the vertical direction.

[0127] Optionally, the optical axis alignment system is also used for:

[0128] The contour tooling 03 is controlled to rotate to a second preset angle so that a second vacant setting position in each setting position is in a straight line with the laser collimator 01 and the target camera 05 in the vertical direction.

[0129] Optionally, the optical axis alignment system is also used for:

[0130] The contour tooling 03 is controlled to rotate to a third preset angle so that the third setting position where the hole device 04 is installed in each setting position is in a straight line with the laser collimator 01 and the target camera 05 in the vertical direction.

[0131] Optionally, the optical axis calibration device further includes: a collection camera; the optical axis calibration system is also used for:

[0132] Acquire the optical path image of the laser collimator 01 through the acquisition camera;

[0133] Identify the outgoing light path of the laser collimator 01 and the reflected light path of the laser collimator 01 in the light path picture;

[0134] Determine whether the outgoing light path and the reflected light path coincide with each other.

[0135] Optionally, the center calibration module 20 is further used for:

[0136] Collecting the light spot image of the target camera 05;

[0137] Identify whether the light spot in the light spot image coincides with the sensor center of the target camera 05.

[0138] The optical axis calibration system provided by the present application adopts the optical axis calibration method in the above embodiment, which can solve the technical problem of how to improve the accuracy of the optical axis calibration of the product. Compared with the prior art, the beneficial effects of the optical axis calibration system provided by the present application are the same as the beneficial effects of the optical axis calibration method provided by the above embodiment, and other technical features in the optical axis calibration system are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0139] The present application provides an optical axis calibration device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the optical axis calibration method in the above-mentioned embodiment one.

[0140] Reference below Figure 8, which shows a schematic diagram of the structure of an optical axis calibration device suitable for implementing an embodiment of the present application. The optical axis calibration device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 8 The optical axis calibration device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0141] like Figure 8 As shown, the optical axis calibration device may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the optical axis calibration device are also stored. The processing device 1001, ROM1002 and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the optical axis calibration device to communicate with other devices wirelessly or by wire to exchange data. Although the optical axis calibration device with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0142] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0143] The optical axis calibration device provided by the present application adopts the optical axis calibration method in the above embodiment, which can solve the technical problem of how to improve the accuracy of the optical axis calibration of the product. Compared with the prior art, the beneficial effects of the optical axis calibration device provided by the present application are the same as the beneficial effects of the optical axis calibration method provided by the above embodiment, and the other technical features in the optical axis calibration device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0144] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0145] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0146] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, wherein the computer-readable program instructions are used to execute the optical axis calibration method in the above-mentioned embodiment.

[0147] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM: Random Access Memory), a read-only memory (ROM: Read Only Memory), an erasable programmable read-only memory (EPROM: Erasable Programmable Read Only Memory or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM: CD-Read Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency: Radio Frequency), etc., or any suitable combination of the above.

[0148] The computer-readable storage medium may be included in the optical axis calibration device; or may exist independently without being assembled into the optical axis calibration device.

[0149] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the optical axis calibration device, the optical axis calibration device: adjusts the irradiation angle of the laser collimator until it is detected that the outgoing light path of the laser collimator coincides with the reflected light path of the laser collimator, wherein the reflected light path is obtained by reflecting the outgoing light path through the reflector; controls the laser collimator to directly irradiate the target camera to obtain the light spot of the outgoing light path on the target camera; adjusts the angle of the target camera until the light spot coincides with the sensor center of the target camera; respectively adjusts the horizontal displacement of the laser collimator and the target camera so that the outgoing light path passes through a perforated device with a preset aperture, and completes the central optical axis calibration when it is detected that the light spot coincides with the sensor center of the target camera.

[0150] The computer program code for performing the operation of the present application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on the remote computer, or entirely on the remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0151] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0152] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0153] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above optical axis calibration method, and can solve the technical problem of how to improve the accuracy of product optical axis calibration. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the optical axis calibration method provided in the above embodiment, and will not be elaborated here.

[0154] The present application also provides a computer program product, including a computer program, which implements the steps of the optical axis calibration method as described above when executed by a processor.

[0155] The computer program product provided by the present application can solve the technical problem of how to improve the accuracy of product optical axis calibration. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the optical axis calibration method provided by the above embodiment, which will not be repeated here.

[0156] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. An optical axis calibration method, characterized in that: The method is applied to an optical axis calibration device, which includes: a laser collimator, a reflector, a profiling tool and a hole device, wherein the reflector and the hole device are arranged on the profiling tool, and the laser collimator, the profiling tool and the target camera are arranged in sequence from bottom to top; The method comprises: Adjusting the irradiation angle of the laser collimator until it is detected that the outgoing light path of the laser collimator coincides with the reflected light path of the laser collimator, wherein the reflected light path is obtained by reflecting the outgoing light path through the reflector; Controlling the laser collimator to directly irradiate a target camera, and obtaining a light spot of the outgoing light path on the target camera; Adjusting the angle of the target camera until the light spot coincides with the sensor center of the target camera; The horizontal displacement of the laser collimator and the target camera is adjusted respectively so that the outgoing light path passes through a perforated device with a preset aperture, and when it is detected that the light spot coincides with the sensor center of the target camera, the central optical axis calibration is completed.

2. The optical axis calibration method according to claim 1, characterized in that: The optical axis calibration device further comprises: an aperture and a slide, wherein the aperture is arranged between the laser collimator and the profiling tooling, and the laser collimator is arranged on the slide; Before the step of adjusting the setting angle of the laser collimator, the method further includes: Adjusting the rotation angle of the aperture with the center of the aperture as the rotation point, wherein the rotation angle is the edge angle of the target camera to be measured; The setting angle of the laser collimator is adjusted by the slide table so that the setting angle is the same as the rotation angle.

3. The optical axis calibration method according to claim 1, characterized in that: The profiling tool is an axially rotatable structure, and is provided with a plurality of non-overlapping setting positions in the vertical direction; Before the step of adjusting the irradiation angle of the laser collimator, the method further comprises: The contour tooling is controlled to rotate at a first preset angle so that a first setting position in each setting position where the reflector is installed is in a straight line with the laser collimator and the target camera in a vertical direction.

4. The optical axis calibration method according to claim 3, characterized in that: Before the step of controlling the laser collimator to directly irradiate the target camera, the method further includes: The contouring tool is controlled to rotate to a second preset angle so that a second vacant setting position in each setting position is in a straight line with the laser collimator and the target camera in the vertical direction.

5. The optical axis calibration method according to claim 3, characterized in that: Before the step of respectively adjusting the horizontal displacement of the laser collimator and the target camera, the method further includes: The profiling tool is controlled to rotate a third preset angle so that a third setting position in each setting position where the hole device is installed is in a straight line with the laser collimator and the target camera in the vertical direction.

6. The optical axis calibration method according to claim 1, characterized in that: The optical axis calibration device further includes: a collection camera; after the step of adjusting the illumination angle of the laser collimator, the method further includes: Acquire the optical path image of the laser collimator through the acquisition camera; Identifying an outgoing light path of the laser collimator and a reflected light path of the laser collimator in the light path picture; Determine whether the outgoing light path and the reflected light path coincide with each other.

7. The optical axis calibration method according to claim 6, characterized in that: The step of obtaining the light spot of the outgoing light path on the target camera comprises: Acquire the light spot image of the target camera by the acquisition camera; Identify whether the light spot in the light spot picture coincides with the sensor center of the target camera.

8. An optical axis calibration system, characterized in that: The system is arranged on an optical axis calibration device, and the optical axis calibration device comprises: a laser collimator, a reflector, a profiling tool and a hole device, wherein the reflector and the hole device are arranged on the profiling tool, and the laser collimator, the profiling tool and the target camera are arranged in sequence from bottom to top; The system comprises: A verticality calibration module, used for adjusting the irradiation angle of the laser collimator until it is detected that the outgoing light path of the laser collimator coincides with the reflected light path of the laser collimator, wherein the reflected light path is obtained by reflecting the outgoing light path through the reflector; A center calibration module, used to control the laser collimator to directly irradiate the target camera, obtain the light spot of the outgoing light path on the target camera; adjust the angle of the target camera until the light spot coincides with the sensor center of the target camera; The horizontal plane calibration module is used to adjust the horizontal displacement of the laser collimator and the target camera respectively, so that the outgoing light path passes through a perforated device with a preset aperture, and when it is detected that the light spot coincides with the sensor center of the target camera, the central optical axis calibration is completed.

9. An optical axis calibration device, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the optical axis calibration method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the optical axis calibration method according to any one of claims 1 to 7 are implemented.

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