Lens focal length measuring system and method based on artificial intelligence

Abstract

The invention belongs to the technical field of optical testing and artificial intelligence application, and particularly relates to a lens focal length measuring system and method based on artificial intelligence. The distance between a to-be-measured lens and an image receiving assembly is adjusted through a translation assembly so that the definition of the center of a cross-shaped pattern can be consistent with that of a standard pattern; the to-be-measured lens is adjusted through the first rotating end of the translation assembly to rotate with the vertical diameter as the axis so that the definition of the two horizontal ends of the cross-shaped pattern can be consistent with the definition of the standard pattern. The second rotating end of the rotating assembly adjusts the to-be-measured lens to rotate with the horizontal diameter as the axis so that the definition of the two vertical ends of the cross-shaped pattern can be consistent with the definition of the standard pattern. The camera is used for acquiring an image and rapidly and accurately processing the image, the orientation and position of the to-be-measured lens are adjusted according to a processing result so as to realize accurate and rapid measurement, meanwhile, the rotating assembly of the to-be-measured lens and the processing result are combined to adjust the orientation of the lens, and the precision requirement of a measurement result is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical fields of optical testing and artificial intelligence applications, and particularly relates to an artificial intelligence-based lens focal length measurement system and method thereof. Background Art

[0002] A lens is the most commonly used optical element in an optical system, and the optical system plays a very important role in various fields such as lidar, camera perception, industrial production and monitoring, medical devices, optical interconnection and optical computing, and bionic technology required by artificial intelligence. Its focal length is an important parameter in aspects such as the design, imaging, and laser detection of a precision optical system, and has important academic significance and application value for them. Higher requirements are also put forward for the measurement accuracy and measurement efficiency of the focal length. At present, the main methods for measuring the focal length of a lens include the magnification method, the nodal shift method, the combination lens method, the conjugate method, as well as the grating method, the interference method, etc. When measuring by the interference method, the optical path is not coaxial, and the measurement accuracy is easily affected by the surrounding environment. The conjugate method is affected by factors such as optical path adjustment, and the error in imaging quality judgment leads to a decrease in accuracy. It is difficult to meet the requirements of both measurement accuracy and measurement efficiency during the actual measurement process. The grating method uses the good spectral splitting effect of the grating to calculate the distance between adjacent orders to determine the focal length, but the diffraction order is likely to introduce additional measurement noise, affecting the final measurement accuracy.

[0003] Therefore, it is necessary to design an artificial intelligence-based lens focal length measurement system and method to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an artificial intelligence-based lens focal length measurement system and method, which uses a camera to obtain an image and perform fast and accurate processing, and uses the processing result to adjust the orientation and position of the lens to be measured to achieve precise and fast measurement. At the same time, the rotation component of the lens to be measured and the processing result jointly adjust the orientation of the lens to ensure the accuracy requirements of the measurement result.

[0005] To achieve the above purpose, the present invention provides the following solution: An artificial intelligence-based lens focal length measurement system, comprising

[0006] A support base;

[0007] A translation component, arranged in the middle of the top end of the support base;

[0008] A rotation component, fixedly arranged at the top end of the first rotation end of the translation component;

[0009] A lens to be measured, detachably installed at the second rotation end of the rotation component. The lens to be measured is vertically arranged, and its horizontal diameter coincides with the axis of the second rotation end of the rotation component. The vertical diameter of the lens to be measured coincides with the axis of the first rotation end of the translation component;

[0010] An imaging component is disposed at the top of the support base. The imaging component is located on one side of the lens to be measured and is coaxial with the lens to be measured. The imaging component is configured to emit light to the lens to be measured and form a cross-shaped pattern on the image receiving component. The image receiving component compares the clarity of the cross-shaped pattern with that of a standard pattern and obtains a comparison result.

[0011] A control system is electrically connected to the image receiving component, the translation component, and the rotation component. The control system is configured to receive the comparison result output by the image receiving component and adjust the position and attitude of the lens to be measured through the translation component and the rotation component according to the comparison result.

[0012] The distance between the lens to be measured and the image receiving component is adjusted by the translation component to make the clarity at the center of the cross-shaped pattern consistent with that of the standard pattern. The lens to be measured is adjusted to rotate about the vertical diameter axis by the first rotating end of the translation component to make the clarity at the horizontal two ends of the cross-shaped pattern consistent with that of the standard pattern. The lens to be measured is adjusted to rotate about the horizontal diameter axis by the second rotating end of the rotation component to make the clarity at the vertical two ends of the cross-shaped pattern consistent with that of the standard pattern.

[0013] In the lens focal length measurement system based on artificial intelligence of the present invention, the translation component includes a lead screw guide rail. The lead screw guide rail is fixedly connected to the top of the support base. One end of the lead screw guide rail is fixedly connected to the output shaft of a first motor. A base is slidably connected to the lead screw guide rail. A second motor is fixedly connected to the top of the base. The output shaft of the second motor is fixedly connected to the bottom end of a vertically arranged support link. The rotation component is fixedly connected to the top end of the support link.

[0014] In the lens focal length measurement system based on artificial intelligence of the present invention, the rotation component includes a horizontal adjustment part. The horizontal adjustment part is fixedly connected to the top end of the support link. The telescopic end of the horizontal adjustment part is movably connected to a rotation part. The lens to be measured is detachably connected to the rotation part. The bottom end of the lens to be measured is in movable contact with the top end of the horizontal adjustment part.

[0015] In the lens focal length measurement system based on artificial intelligence of the present invention, the horizontal adjustment part includes a rotating base. The rotating base is fixedly connected to the top end of the support link. The rotating base is hollow inside and has an opening at one end. A first adjustment bolt is threadedly connected to the other end of the rotating base. A telescopic rod is disposed inside the rotating base. The first adjustment bolt is rotatably connected to the fixed end of the telescopic rod. The telescopic end of the telescopic rod is located outside the rotating base. The rotation part is movably connected to the telescopic end of the telescopic rod. A second marking line is disposed in the middle of the outer side wall of the rotating base.

[0016] The lens focal length measurement system based on artificial intelligence of the present invention, wherein the rotating part includes two guiding rods, the two guiding rods are vertically and slidably arranged at the telescopic end of the telescopic rod, the tops of the two guiding rods are fixedly connected with a rotating side plate together, the middle of the bottom end of the rotating side plate is rotatably connected with a second adjusting bolt, the second adjusting bolt is threadedly connected with the telescopic end of the telescopic rod, a third motor is fixedly connected to the middle of the side wall of the rotating side plate away from the rotating base, the output shaft of the third motor is fixedly connected with a magnet through a fixing plate, and a first marking line is arranged on the magnet.

[0017] The lens focal length measurement system based on artificial intelligence of the present invention, an outer frame is arranged at the edge of the lens to be measured, the lens to be measured is detachably connected with the magnet through the outer frame, third marking lines are arranged at both ends in the horizontal direction and both ends in the vertical direction of the outer frame, the third marking lines in the horizontal direction correspond to the first marking line, and the third marking lines in the vertical direction correspond to the second marking line.

[0018] The lens focal length measurement system based on artificial intelligence of the present invention, the imaging component includes a sleeve, the sleeve is horizontally arranged and a standard lens is arranged at one end close to the lens to be measured, the standard lens and the lens to be measured are coaxial, the other end of the sleeve is detachably connected with a protective cover through a first magnetic ring, a light source is arranged in the middle of the inner side wall of the protective cover, a pattern carrier is detachably connected in the inner part of the sleeve close to the protective cover through a second magnetic ring, the pattern carrier is located between the light source and the standard lens, a plurality of pattern samples are arranged on the pattern carrier, the plurality of pattern samples are distributed in a cross shape, and both the sleeve and the protective cover are fixedly connected with the top end of the support base through a first support rod.

[0019] The lens focal length measurement system based on artificial intelligence of the present invention, the image receiving component includes a camera, the camera is fixedly connected with the top end of the support base through a third support rod, the imaging end of the camera faces the lens to be measured, an eyepiece is arranged between the camera and the lens to be measured, the eyepiece is fixedly connected with the top end of the support base through a second support rod, and the lens to be measured, the eyepiece and the camera are coaxially arranged.

[0020] The lens focal length measurement system based on artificial intelligence of the present invention, the control system includes a control processor, and the control processor is electrically connected with the image receiving component, the translation component and the rotation component.

[0021] A measurement method for a lens focal length measurement system based on artificial intelligence, comprising the following steps:

[0022] Install the lens to be measured on the rotating component in a vertical state;

[0023] Adjust the distance between the lens under test and the image receiving component by the translation component to make the clarity at the center of the cross-shaped pattern consistent with that of the standard pattern;

[0024] Adjust the lens under test to rotate about the horizontal diameter axis by the second rotation end of the rotation component to make the clarity of the vertical two ends of the cross-shaped pattern consistent;

[0025] Adjust the lens under test to rotate about the vertical diameter axis by the first rotation end of the translation component to make the clarity of the horizontal two ends of the cross-shaped pattern consistent;

[0026] Adjust the distance between the lens under test and the image receiving component by the translation component to make the clarity of all images of the cross-shaped pattern consistent with that of the standard pattern, and record the distance value between the lens under test and the center of the translation component at this time;

[0027] Calculate the focal length value of the lens under test.

[0028] Compared with the prior art, the present invention has the following advantages and technical effects:

[0029] The present invention designs a cross-shaped reference pattern for the clarity of images in all directions, generates parallel light of the reference pattern under the lens system, and uses the translation component, rotation component, image receiving component and control system to work organically and cooperatively. According to the cross-shaped pattern captured by the image receiving component, the clarity is compared in different directions. Using the comparison result, the control system drives the translation component and the rotation component to make the lens under test rotate around the horizontal axis or the vertical axis until there is no difference in clarity comparison, that is, the lens under test is in a completely vertical state; furthermore, the clarity of the cross-shaped pattern captured by the image receiving system is compared with the standard pattern, and the control system drives the translation component to move the lens under test using the comparison result until there is no difference in clarity comparison, so as to accurately obtain the focal length of the lens under test; in addition, the rotation component is convenient for measuring lenses under test of different sizes, and is also convenient for quickly and accurately adjusting the lens under test to be coaxial and at the same height as the test optical path, and there are no special requirements, and it can quickly adjust the coaxiality and height of the lens under test in the test optical path. The present invention uses artificial intelligence to accurately adjust the orientation and position of the lens under test, measure the focal length parameter, has the characteristics of high-precision and fast testing, high intelligence, good reliability and stability, and the whole system is simple and easy to implement. Description of the Drawings

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings:

[0031] Figure 1 It is the overall schematic diagram of the system of the present invention;

[0032] Figure 2 is Figure 1 the partial enlarged view of A in;

[0033] Figure 3 It is the side view of the rotating assembly of the present invention;

[0034] Figure 4 It is the schematic diagram of the rotating part of the present invention;

[0035] Figure 5 It is the schematic diagram of the internal structure of the imaging assembly of the present invention;

[0036] Figure 6 It is the schematic diagram of the pattern carrier of the present invention;

[0037] Figure 7 It is the schematic diagram of the lens to be measured of the present invention.

[0038] Among them, 1, support base; 2, lead screw guide rail; 3, first motor; 4, first support rod; 5, sleeve; 6, first magnetic ring; 7, protective cover; 8, base; 9, second motor; 10, support link; 11, rotating base; 12, first adjusting bolt; 13, guiding rod; 14, rotating side plate; 15, outer frame; 16, lens to be measured; 17, second support rod; 18, eyepiece; 19, third support rod; 20, camera; 21, control processor; 22, telescopic rod; 23, second adjusting bolt; 24, third motor; 25, fixing plate; 26, magnet; 27, first marking line; 28, second marking line; 29, light source; 30, pattern carrier; 31, second magnetic ring; 32, standard lens; 33, pattern sample; 34, third marking line. Specific embodiments

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0040] To make the above objects, features, and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Referring to Figures 1 to 7 As shown, the present invention provides an artificial intelligence-based lens focal length measurement system, including

[0042] a support base 1;

[0043] a translation component, arranged in the middle of the top of the support base 1;

[0044] a rotation component, fixedly arranged at the top of the first rotation end of the translation component;

[0045] a lens to be measured 16, detachably installed at the second rotation end of the rotation component. The lens to be measured 16 is vertically arranged, and its horizontal diameter coincides with the axis of the second rotation end of the rotation component. The vertical diameter of the lens to be measured 16 coincides with the axis of the first rotation end of the translation component;

[0046] an imaging component, arranged at the top of the support base 1. The imaging component is located on one side of the lens to be measured 16 and is coaxial with the lens to be measured 16. The imaging component is used to emit light to the lens to be measured 16 and form a cross-shaped pattern on the image receiving component. The image receiving component compares the clarity of the cross-shaped pattern with that of the standard pattern and obtains a comparison result;

[0047] a control system, electrically connected to the image receiving component, the translation component, and the rotation component. The control system is used to receive the comparison result output by the image receiving component and adjust the position and attitude of the lens to be measured 16 through the translation component and the rotation component according to the comparison result;

[0048] The distance between the lens to be measured 16 and the image receiving component is adjusted through the translation component to make the clarity of the center of the cross-shaped pattern consistent with that of the standard pattern. The lens to be measured 16 is adjusted to rotate about the vertical diameter axis through the first rotation end of the translation component to make the clarity of the horizontal two ends of the cross-shaped pattern consistent with that of the standard pattern. The lens to be measured 16 is adjusted to rotate about the horizontal diameter axis through the second rotation end of the rotation component to make the clarity of the vertical two ends of the cross-shaped pattern consistent with that of the standard pattern.

[0049] Further, the translation component includes a lead screw guide rail 2. The lead screw guide rail 2 is fixedly connected to the top of the support base 1. One end of the lead screw guide rail 2 is fixedly connected to the output shaft of a first motor 3. A base 8 is slidably connected to the lead screw guide rail 2. The top of the base 8 is fixedly connected to the bottom end of a vertical support link 10. The rotation component is fixedly connected to the top of the support link 10.

[0050] Further, the rotating assembly includes a horizontal adjustment part. The horizontal adjustment part is fixedly connected to the top end of the support link 10. The telescopic end of the horizontal adjustment part is movably connected to a rotating part. The lens to be measured 16 is detachably connected to the rotating part. The bottom end of the lens to be measured 16 is in movable contact with the top end of the horizontal adjustment part.

[0051] Further, the horizontal adjustment part includes a rotating base 11. The rotating base 11 is fixedly connected to the top end of the support link 10. The interior of the rotating base 11 is hollow and open at one end. A first adjustment bolt 12 is threadedly connected to the other end of the rotating base 11. A telescopic rod 22 is arranged inside the rotating base 11. The first adjustment bolt 12 is rotatably connected to the fixed end of the telescopic rod 22. The telescopic end of the telescopic rod 22 is located outside the rotating base 11. The rotating part is movably connected to the telescopic end of the telescopic rod 22. A second marking line 28 is arranged in the middle of the outer side wall of the rotating base 11.

[0052] Further, the rotating part includes two guiding rods 13. The two guiding rods 13 are vertically and slidably arranged at the telescopic end of the telescopic rod 22. The top ends of the two guiding rods 13 are fixedly connected together with a rotating side plate 14. The middle of the bottom end of the rotating side plate 14 is rotatably connected to a second adjustment bolt 23. The second adjustment bolt 23 is threadedly connected to the telescopic end of the telescopic rod 22. A third motor 24 is fixedly connected to the middle of the side wall of the rotating side plate 14 away from the rotating base 11. The output shaft of the third motor 24 is fixedly connected to a magnet 26 through a fixing plate 25. A first marking line 27 is arranged on the magnet 26.

[0053] Scale values are arranged on both the support link 10 and the guiding rods 13. The lifting height can be judged through the scale values. The lifting height of the rotating side plate 14 is judged through the scale values on the guiding rods 13. The support link 10 is adjusted by using the lifting height of the rotating side plate 14. When the rotating side plate 14 rises, the support link 10 drops by a corresponding height. When the rotating side plate 14 drops, the support link 10 rises by a corresponding height. Thus, the adjustment process of making the optical path coaxial and at the same height can be quickly realized.

[0054] Further, an outer frame 15 is arranged at the edge of the lens to be measured 16. The lens to be measured 16 is detachably connected to the magnet 26 through the outer frame 15. Third marking lines 34 are arranged at both ends in the horizontal direction and both ends in the vertical direction of the outer frame 15. The third marking lines 34 in the horizontal direction correspond to the first marking line 27. The third marking lines 34 in the vertical direction correspond to the second marking line 28.

[0055] There is an arc-shaped groove on the upper surface of the rotating base 11. The arc-shaped groove is in contact with the outer frame 15.

[0056] The telescopic rod 22 adjusts the position in the horizontal direction through the first adjusting bolt 12 to drive the lens under test 16 to move left and right. Adjust the horizontal movement until the third marking line 34 at the bottom end of the outer frame 15 of the lens under test coincides with the second marking line 28, and the second marking line 28 coincides with the axis of the support connecting rod 10, so that the optical path is coaxial when the lens under test 16 coincides with the second marking line 28.

[0057] The rotating side plate 14 can be adjusted to move up and down through the second adjusting bolt 23, so as to drive the lens under test 16 to move up and down. Move up and down until the third marking line 34 at one horizontal end of the outer frame 1 coincides with the first marking line 27, and the first marking line 27 coincides with the axis of the output shaft of the third motor 24, ensuring that there is no eccentricity when the third motor 24 drives the lens under test 16 to rotate. The position of the first marking line 27 is at the same height as the optical axis of the imaging component, so that the optical path is at the same height when the third marking line 34 coincides with the first marking line 27; Through the up and down and left and right movements, the rotating component can fix the lens under test 16 of different sizes, and it is easy to achieve coaxial and equal height with components such as the imaging component and the camera 20.

[0058] Furthermore, the imaging component includes a sleeve 5. The sleeve 5 is horizontally arranged and a standard lens 32 is arranged at one end close to the lens under test 16. The standard lens 32 is coaxial with the lens under test 16. The other end of the sleeve 5 is detachably connected with a protective cover 7 through a first magnetic ring 6. A light source 29 is arranged in the middle of the inner side wall of the protective cover 7. A pattern carrier 30 is detachably connected to the inside of the sleeve 5 close to the protective cover 7 through a second magnetic ring 31. The pattern carrier 30 is located between the light source 29 and the standard lens 32. A number of pattern samples 33 are arranged on the pattern carrier 30, and the number of pattern samples 33 is distributed in a cross shape. Both the sleeve 5 and the protective cover 7 are fixedly connected to the top of the support base 1 through a first support rod 4.

[0059] The pattern carrier 30 is located at the focal plane position of the standard lens 32.

[0060] Furthermore, the image receiving component includes a camera 20. The camera 20 is fixedly connected to the top of the support base 1 through a third support rod 19. The imaging end of the camera 20 faces the lens under test 16. An eyepiece 18 is arranged between the camera 20 and the lens under test 16. The eyepiece 18 is fixedly connected to the top of the support base 1 through a second support rod 17. The lens under test 16, the eyepiece 18, and the camera 20 are coaxially arranged.

[0061] Furthermore, the control system includes a control processor 21, and the control processor 21 is electrically connected to the image receiving component, the translation component, and the rotation component.

[0062] A measuring method for a lens focal length measuring system based on artificial intelligence includes the following steps:

[0063] Mount the lens 16 to be measured vertically on the rotating assembly;

[0064] Place the lens 16 to be measured vertically on the magnet 26, and adjust the first adjusting bolt 12 and the second adjusting bolt 23 respectively, so that the third marking line 34 on the lens outer frame 15 is aligned with the first marking line 27 and the second marking line 28.

[0065] Adjust the distance between the lens 16 to be measured and the image receiving assembly through the translation assembly, so that the clarity of the center of the cross pattern is the same as that of the standard pattern;

[0066] Place the pattern carrier 30 on the second magnetic ring 31 at the focal plane position of the standard lens 32. Place the lens 16 to be measured at the original center position of the lead screw guide 2. The scale of the original center position is 0, the positive scale is towards the camera 20, and the negative scale is towards the standard lens 32. Slowly move the lens 16 to be measured on the lead screw guide 2 through the first motor 3. Coarsely adjust the position of the lens 16 to be measured on the lead screw guide 2 according to the pattern sample 33 captured by the camera 20 until there is a relatively clear pattern sample 33 on the camera 20, and the control processor 21 automatically records the position of the lens 16 to be measured.

[0067] Adjust the lens 16 to be measured to rotate about the horizontal diameter axis through the second rotating end of the rotating assembly, so that the clarity of the vertical ends of the cross pattern is consistent;

[0068] Taking the pattern sample 33 in the middle of the pattern carrier 30 as a reference, compare the pattern sample 33 directly above or below it with it. If the clarity is different, the third motor 24 rotates slowly clockwise, and at the same time continue to compare the clarity of the above two pattern samples 33. If the difference in clarity is decreasing, continue to rotate clockwise until the clarity is the same; if the difference in clarity is increasing, change the third motor 24 to rotate counterclockwise, and at the same time continue to compare the clarity of the above two pattern samples 33, so that the difference in clarity becomes smaller until the clarity is the same; when rotating clockwise or counterclockwise until the clarity is the same, compare the clarity of the pattern samples 33 directly above and below to determine whether they are the same, so as to confirm again that the rotation of the third motor 24 has indeed reached the position.

[0069] Adjust the lens 16 to be measured to rotate about the vertical diameter axis through the first rotating end of the translation assembly, so that the clarity of the horizontal ends of the cross pattern is consistent;

[0070] Taking the pattern sample 33 in the middle of the pattern carrier 30 as a reference, compare the pattern samples 33 on its left or right with it. If the clarity is different, the second motor 9 rotates slowly clockwise, and at the same time continue to compare the clarity of the above two pattern samples 33. If the difference in clarity is decreasing, continue to rotate clockwise until the clarity is the same; if the difference in clarity is increasing, change the rotation of the second motor 9 to counterclockwise, and at the same time continue to compare the clarity of the above two pattern samples 33 to make the difference in clarity decrease until the clarity is the same; when rotating clockwise or counterclockwise until the clarity is the same, compare the clarity of the pattern samples 33 on the left and right of the middle pattern sample 33 to determine whether they are the same, so as to confirm again that the rotation of the second motor 9 has indeed reached the position.

[0071] Adjust the distance between the lens 16 to be measured and the image receiving component through the translation component so that the clarity of all images of the cross-shaped pattern is the same as that of the standard pattern, and record the distance value between the lens 16 to be measured and the center of the translation component at this time;

[0072] Use the first motor 3 to slowly move the lens 16 to be measured towards the camera 20. During the movement, judge whether the clarity of the pattern sample 33 is getting worse or better based on the clarity of the pattern sample 33 at the previous position. If the clarity gets better, continue to move slowly in this direction until the clarity is the same as the standard image, and record and calculate the distance x1 of the lens 16 to be measured from the original center position at this time. At this time, x1 is a positive value; if the clarity gets worse, change the moving direction of the lens 16 to be measured to move slowly towards the standard lens 32 until the clarity is the same as the standard image, and record and calculate the distance x1 of the lens 16 to be measured from the original center position at this time. At this time, x1 is a negative value.

[0073] Compare the clarity of the pattern samples 33 in each direction of the pattern carrier 30 captured by the camera 20 with the pattern sample 33 in the middle again to determine that there is no difference in clarity. If there is a difference, repeat the above operation steps.

[0074] The reference pattern can be a pattern similar to a cross.

[0075] Calculate the focal length value of the lens 16 to be measured.

[0076] Calculate the focal length f of the lens: f = L - x1, where L is the distance from the original center position of the lead screw guide 2 to the reticle of the eyepiece 18.

[0077] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0078] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope of the present invention.

Claims

1. An artificial intelligence-based lens focal length measurement system, characterized in that, including a support base (1); a translation assembly, arranged at the middle of the top end of the support base (1); a rotation assembly, fixedly arranged at the top end of the first rotation end of the translation assembly; a lens under test (16), detachably mounted at the second rotation end of the rotation assembly, the lens under test (16) being vertically arranged and the horizontal diameter thereof coinciding with the axis of the second rotation end of the rotation assembly, and the vertical diameter of the lens under test (16) coinciding with the axis of the first rotation end of the translation assembly; an imaging assembly, arranged at the top end of the support base (1), the imaging assembly being located on one side of the lens under test (16) and coaxial with the lens under test (16), the imaging assembly being configured to emit light to the lens under test (16) and form a cross-shaped pattern on an image receiving assembly, and the image receiving assembly comparing the clarity of the cross-shaped pattern with that of a standard pattern and obtaining a comparison result; a control system, electrically connected to the image receiving assembly, the translation assembly, and the rotation assembly, the control system being configured to receive the comparison result output by the image receiving assembly and adjust the position and attitude of the lens under test (16) through the translation assembly and the rotation assembly according to the comparison result; adjusting the distance between the lens under test (16) and the image receiving assembly through the translation assembly to make the clarity of the center of the cross-shaped pattern consistent with that of the standard pattern, adjusting the lens under test (16) to rotate about the vertical diameter as the axis through the first rotation end of the translation assembly to make the clarity of the horizontal two ends of the cross-shaped pattern consistent with that of the standard pattern, and adjusting the lens under test (16) to rotate about the horizontal diameter as the axis through the second rotation end of the rotation assembly to make the clarity of the vertical two ends of the cross-shaped pattern consistent with that of the standard pattern.

2. The lens focal length measurement system based on artificial intelligence according to claim 1, wherein, The translation assembly includes a lead screw guide rail (2), the lead screw guide rail (2) being fixedly connected to the top end of the support base (1), one end of the lead screw guide rail (2) being fixedly connected to the output shaft of a first motor (3), a base (8) being slidably connected to the lead screw guide rail (2), a second motor (9) being fixedly connected to the top end of the base (8), the output shaft of the second motor (9) being fixedly connected to the bottom end of a vertically arranged support link (10), and the rotation assembly being fixedly connected to the top end of the support link (10).

3. The lens focal length measurement system based on artificial intelligence according to claim 2, wherein, The rotation assembly includes a horizontal adjustment part, the horizontal adjustment part being fixedly connected to the top end of the support link (10), a telescopic end of the horizontal adjustment part being movably connected to a rotation part, the lens under test (16) being detachably connected to the rotation part, and the bottom end of the lens under test (16) being in movable contact with the top end of the horizontal adjustment part.

4. The lens focal length measurement system based on artificial intelligence according to claim 3, wherein The horizontal adjustment part includes a rotating base (11). The rotating base (11) is fixedly connected to the top end of the support link (10). The rotating base (11) is hollow inside and open at one end. A first adjustment bolt (12) is threadedly connected to the other end of the rotating base (11). A telescopic rod (22) is arranged inside the rotating base (11). The first adjustment bolt (12) is rotatably connected to the fixed end of the telescopic rod (22). The telescopic end of the telescopic rod (22) is located outside the rotating base (11). The rotating part is movably connected to the telescopic end of the telescopic rod (22). A second marking line (28) is arranged in the middle of the outer side wall of the rotating base (11).

5. The lens focal length measurement system based on artificial intelligence according to claim 4, characterized in that, The rotating part includes two guiding rods (13). The two guiding rods (13) are vertically slidably arranged at the telescopic end of the telescopic rod (22). A rotating side plate (14) is fixedly connected to the top ends of the two guiding rods (13). A second adjustment bolt (23) is rotatably connected to the middle of the bottom end of the rotating side plate (14). The second adjustment bolt (23) is threadedly connected to the telescopic end of the telescopic rod (22). A third motor (24) is fixedly connected to the middle of the side wall of the rotating side plate (14) away from the rotating base (11). A magnet (26) is fixedly connected to the output shaft of the third motor (24) through a fixing plate (25). A first marking line (27) is arranged on the magnet (26).

6. The lens focal length measurement system based on artificial intelligence according to claim 5, characterized in that, An outer frame (15) is arranged at the edge of the lens under test (16). The lens under test (16) is detachably connected to the magnet (26) through the outer frame (15). Third marking lines (34) are arranged at both ends in the horizontal direction and both ends in the vertical direction of the outer frame (15). The third marking lines (34) in the horizontal direction correspond to the first marking line (27), and the third marking lines (34) in the vertical direction correspond to the second marking line (28).

7. The lens focal length measurement system based on artificial intelligence according to claim 1, characterized in that, The imaging assembly includes a sleeve (5). The sleeve (5) is horizontally arranged and a standard lens (32) is arranged at one end close to the lens under test (16). The standard lens (32) is coaxial with the lens under test (16). The other end of the sleeve (5) is detachably connected to a protective cover (7) through a first magnetic ring (6). A light source (29) is arranged in the middle of the inner side wall of the protective cover (7). A pattern carrier (30) is detachably connected inside the end of the sleeve (5) close to the protective cover (7) through a second magnetic ring (31). The pattern carrier (30) is located between the light source (29) and the standard lens (32). A number of pattern samples (33) are arranged on the pattern carrier (30). The number of pattern samples (33) is distributed in a cross shape. The sleeve (5) and the protective cover (7) are both fixedly connected to the top end of the support base (1) through a first support rod (4).

8. The lens focal length measurement system based on artificial intelligence according to claim 1, characterized in that, The image receiving component includes a camera (20), which is fixedly connected to the top of the support base (1) through a third support rod (19). The imaging end of the camera (20) faces the lens under test (16). An eyepiece (18) is arranged between the camera (20) and the lens under test (16). The eyepiece (18) is fixedly connected to the top of the support base (1) through a second support rod (17). The lens under test (16), the eyepiece (18), and the camera (20) are coaxially arranged.

9. The lens focal length measurement system based on artificial intelligence according to claim 1, wherein The control system includes a control processor (21), and the control processor (21) is electrically connected to the image receiving component, the translation component, and the rotation component.

10. A measurement method of the lens focal length measurement system based on artificial intelligence according to any one of claims 1-9, characterized in that, It includes the following steps: Mount the lens under test (16) in a vertical state on the rotation component; Adjust the distance between the lens under test (16) and the image receiving component through the translation component to make the clarity of the center of the cross-shaped pattern consistent with that of the standard pattern; Adjust the lens under test (16) to rotate about the horizontal diameter through the second rotation end of the rotation component to make the clarity of the vertical two ends of the cross-shaped pattern consistent; Adjust the lens under test (16) to rotate about the vertical diameter through the first rotation end of the translation component to make the clarity of the horizontal two ends of the cross-shaped pattern consistent; Adjust the distance between the lens under test (16) and the image receiving component through the translation component to make the clarity of all images of the cross-shaped pattern consistent with that of the standard pattern, and record the distance value between the lens under test (16) and the center of the translation component at this time; Calculate the focal length value of the lens under test (16).

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