A non-spherical element contour detection device

Abstract

The present invention belongs to the technical field of detection equipment, and specifically is a non-spherical element contour detection device, comprising a workbench, a precision air-floating turntable is installed on the workbench, a placing table is installed on the precision air-floating turntable, a bracket is installed on the workbench, a precision air-floating linear guide is installed on the bracket, a connecting block is installed on the precision air-floating linear guide, and a detection rod and a displacement sensor are installed in the connecting block; the detection rods are provided with multiple groups, and the detection rods are arranged in sequence on the connecting piece to form a detection array; the present invention has a simple structure, and multiple groups of detection rods can be used to form a detection array to detect the surface of the element at the same time, and when the detection rods move along the generatrix of the element surface, the same point on the element surface is repeatedly detected, thereby reducing the detection error and improving the detection accuracy and detection speed.

Description

Technical Field

[0001] The invention belongs to the technical field of detection equipment, in particular to a device for detecting the contour of a non-spherical element. Background Art

[0002] Due to the superior performance of aspheric optical parts, the demand for aspheric optical parts in a variety of high-precision optical systems is becoming more and more urgent. However, the difficulty of aspheric processing and detection has greatly limited the application of aspheric optical parts.

[0003] In the prior art, there are various methods for detecting the surface shape of optical aspheric surfaces, among which the point-type coordinate measurement method is the most widely used. However, since the point-type measurement device adopts a certain step length for sampling, not only is its operation efficiency low, but the measurement accuracy (or measurement uncertainty) is greatly affected by the step length. If the step length is not selected appropriately, the measurement accuracy will be seriously affected. It is not suitable for the measurement of optical aspheric surfaces with large relative apertures and steeper curved surfaces. Summary of the invention

[0004] In order to make up for the shortcomings of the prior art, a detection array is formed by using multiple groups of detection rods to simultaneously detect the surface of the component, and the same point on the surface of the component is repeatedly detected when the detection rod moves along the generatrix of the component surface, thereby reducing the detection error and improving the detection accuracy and detection speed. The present invention proposes a non-spherical component contour detection device.

[0005] The technical solution adopted by the present invention to solve its technical problem is: the present invention is a non-spherical element contour detection device, comprising a workbench, a precision air-floating turntable is installed on the workbench, a placement table is installed on the precision air-floating turntable, the placement table is used to place the non-spherical element to be detected, brackets are symmetrically installed on the left and right ends of the workbench, a precision air-floating linear guide is installed on the bracket, a slider is installed on the precision air-floating linear guide, a connecting block is installed on the slider, a detection rod and a displacement sensor are installed in the connection block, and the lower end of the detection rod is in contact with the surface of the non-spherical element;

[0006] The displacement sensor is used to detect the displacement distance of the detection rod in the vertical direction. The detection rods are provided in multiple groups. The detection rods are arranged in sequence along the X-axis direction in the connecting block to form a detection array. The detection rods in the detection array are in contact with each other.

[0007] Preferably, the lower end of the detection rod is in an arc shape.

[0008] Preferably, the surfaces of the detection rod and the positioning rod are polished;

[0009] Magnetic blocks are installed at the upper end of the detection rod and the top of the connection block, and there is a magnetic repulsion between the magnetic blocks.

[0010] Preferably, a rectangular hole is provided on the detection rod, and the rectangular hole passes through the detection array along the X-axis direction. A positioning rod is installed in the connecting block, and the positioning rod passes through the rectangular hole. The positioning rod is flat in shape, and baffles are installed at both ends of the positioning rod. The baffles position and block the detection rods at both ends of the detection array.

[0011] Preferably, the detection rod and the baffle are provided with contact lines, the detection rods and the detection rods, and the detection rods and the baffle are in contact with each other through the contact lines, and the cross-section of the contact lines is in the shape of an arc.

[0012] Preferably, a silicone layer is installed on the surface of the placement table, the aspheric element is placed on the silicone layer, and a retaining edge is provided at the edge of the silicone layer. The retaining edge is elastic and fixes the aspheric element.

[0013] Preferably, an airbag cavity is provided in the retaining edge, and an inflation port is provided in the retaining edge, and the inflation port is used to inflate and deflate the airbag cavity, and the airbag cavity will further squeeze and fix the aspheric element after being inflated;

[0014] There are a plurality of groups of the ribs, the diameters of the ribs gradually decrease along the radial direction pointing to the center of the circle, and the thicknesses of the ribs are the same.

[0015] Preferably, the silica gel layer is sticky;

[0016] A protruding capsule is installed at the middle position of the silicone layer, and the surface of the protruding capsule is non-sticky.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The present invention discloses a non-spherical element contour detection device, which is provided with a precision air-floating turntable, a precision air-floating linear guide, a connecting block, a detection rod, a positioning rod and a displacement sensor, so that the detection rod is arranged in the connecting block into a detection array, and multiple points on the non-spherical element are detected at the same time. When the detection array moves along the generatrix, the same point on the non-spherical element can be repeatedly detected to obtain multiple groups of data about the same point. By checking, analyzing and calculating the multiple groups of data, the detection error and data error are reduced, and the accuracy and speed of the non-spherical element contour detection are improved.

[0019] 2. The device for detecting the contour of a non-spherical element described in the present invention, by providing a placement table, a silicone layer, a rib, and a protruding capsule, utilizes the rib and the viscosity of the silicone layer itself to fully fix the non-spherical element, thereby avoiding displacement or falling of the non-spherical element during the detection process, thereby ensuring smooth detection. At the same time, when placing the non-spherical element, the protruding capsule is used to lift and support the non-spherical element, so that the staff can fine-tune the position of the non-spherical element on the placement table. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a front view of the detection device of the present invention;

[0022] Figure 2 It is a front view of the placement table in the detection device of the present invention (without the aspheric element placed);

[0023] Figure 3 It is a schematic diagram of the structure of the placement table in the detection device of the present invention (for placing the aspheric element);

[0024] Figure 4 It is a schematic diagram of the installation of the retaining edge and the silicone layer in the detection device of the present invention;

[0025] Figure 5 is a schematic diagram of contact between the detection rod and the aspheric element in the detection device of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the connecting block and the detection array in the detection device of the present invention;

[0027] Figure 7 It is a structural schematic diagram of a detection rod in the detection device of the present invention;

[0028] Figure 8 yes Figure 3 A partial enlarged view of the middle part;

[0029] Fig. 9 yes Figure 3 A partial enlarged view of point B in the middle;

[0030] Fig.10 yes Figure 5 A partial enlarged view of point C in the middle;

[0031] Fig.11 yes Figure 7 A partial enlarged view of point D in the middle;

[0032] In the figure: workbench 1, precision air floating turntable 2, placement table 21, silicone layer 22, rib 23, airbag cavity 231, inflation port 232, protrusion bag 24, bracket 3, precision air floating linear guide 31, slider 32, connecting block 4, detection rod 41, rectangular hole 411, contact line 412, positioning rod 42, baffle 421, displacement sensor 43, magnetic block 44, aspheric element 5. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] like Figures 1 to 11 As shown, a non-spherical element contour detection device described in the present invention comprises a workbench 1, on which a precision air-floating turntable 2 is installed, on which a placement table 21 is installed, on which a non-spherical element 5 to be detected is placed, and brackets 3 are symmetrically installed at the left and right ends of the workbench 1, on which a precision air-floating linear guide 31 is installed, on which a slider 32 is installed, on which a connecting block 4 is installed, in which a detection rod 41 and a displacement sensor 43 are installed, and the lower end of the detection rod 41 contacts the surface of the non-spherical element 5;

[0035] The displacement sensor 43 is used to detect the displacement distance of the detection rod 41 in the vertical direction. The detection rod 41 is provided with multiple groups. The detection rods 41 are sequentially arranged in the connection block 4 along the X-axis direction to form a detection array. The detection rods 41 in the detection array are in contact with each other.

[0036] When testing the aspheric element 5, the staff places the aspheric element 5 on the placement table 21, and then controls the detection device through the controller, so that the slider 32 moves on the precision air-floating linear guide 31, so that the lower end of the detection rod 41 contacts the surface of the aspheric element 5, and then the displacement data of the detection rod 41 in the vertical direction is detected by the displacement sensor 43, and the generatrix profile of the surface of the aspheric element 5 is obtained through calculation and fitting. After that, the controller controls the precision air-floating turntable 2 to rotate to a set angle, and continues to detect and obtain another generatrix profile of the aspheric element 5. After repeated operations, after obtaining sufficient data, the complete surface profile of the aspheric element 5 is obtained by calculation and fitting through a computer, wherein the precision air-floating turntable 2 selects the air-floating turntable model QFR-300-PLUS-ABS-3 produced by Beijing Ruibang Precision Control Technology Co., Ltd.;

[0037] At the same time, since the multiple groups of detection rods 41 are arranged in sequence to form a detection array, when the surface of the aspheric element 5 is detected, the displacement data of the multiple groups of detection rods 41, that is, the coordinate data of the surface of the aspheric element 5, can be obtained at one time, thereby increasing the detection range of the surface of the aspheric element 5 during the detection process, accelerating the acquisition speed of the detection data, and thus improving the detection speed of the contour of the aspheric element 5. At the same time, when measuring a relatively large-diameter aspheric element 5 or a relatively steep curved surface, the array-arranged detection rods 41 can also fully adapt to the surface of the element, improve the detection accuracy, and avoid large errors or failure to detect;

[0038] At the same time, since the detection rods 41 are arranged to form a detection array, when the slider 32 moves along the precision air-floating linear guide 31, the same point on the surface of the aspheric element 5 will be repeatedly passed and detected by different detection rods 41 in the detection array. At this time, since the thickness of the detection rods 41 is known data, the relative position of each detection rod 41 in the detection array can be clearly known according to the moving distance of the slider 32, so that the displacement data of each detection rod 41 can be corresponded to each point on the aspheric element 5, so that the repeated data detected at each point can be statistically analyzed by a computer, thereby improving the detection accuracy and reducing the error.

[0039] As an embodiment of the present invention, the lower end of the detection rod 41 is in an arc shape;

[0040] By setting an arc shape at the lower end of the detection rod 41, when the detection rod 41 detects the aspheric element 5, a point at the lower end of the detection rod 41 can contact the surface of the aspheric element 5, thereby preventing other parts of the lower end of the detection rod 41 from contacting the surface of the aspheric element 5 and affecting the detection. At the same time, reducing the contact between different parts of the detection rod 41 and the aspheric element 5 can reduce the possibility of damage to the surface of the aspheric element 5.

[0041] As an embodiment of the present invention, the surfaces of the detection rod 41 and the positioning rod 42 are polished;

[0042] A magnetic block 44 is installed at the upper end of the detection rod 41 and the top of the connection block 4, and there is a magnetic repulsion between the magnetic blocks 44;

[0043] Since the detection rods 41 are arranged to form a detection array, and when detecting the aspheric element 5, they will be affected by the curved surface of the aspheric element 5, so that different detection rods 41 have different displacements in the vertical direction, therefore, during the detection process, there will be mutual contact and mutual friction between the detection rods 41. By polishing the surfaces of the detection rods 41 and the positioning rods 42, the surfaces of the detection rods 41 and the positioning rods 42 are made smooth and the friction force is small, thereby reducing the friction force between the detection rods 41 when they move, making it easier for the detection rods 41 to be affected by the surface of the aspheric element 5 and to be displaced, thereby improving the sensitivity of the detection rods 41 and reducing the error of the detection result.

[0044] At the same time, there is a mutually repulsive magnetic repulsion between the magnetic block 44 on the detection rod 41 and the magnetic block 44 at the top of the connecting block 4, so that the detection rod 41 tends to move downward under the action of the repulsive force, that is, the lower end of the detection rod 41 will be in close contact with the surface of the aspheric element 5, so as to avoid the detection rod 41 being subjected to a relatively excessive friction force after being lifted up, resulting in the detection rod 41 being unable to return to its original position, thereby affecting the sensitivity and accuracy of the detection of the detection rod 41, as well as affecting the normal use of the detection device. At the same time, when the detection rod 41 moves upward to the maximum position, the magnetic repulsion between the magnetic blocks 44 is greater than or equal to the friction force exerted on the detection rod 41, thereby limiting the size of the magnetic repulsion exerted on the detection rod 41, and avoiding the lower end of the detection rod 41 from exerting excessive pressure on the surface of the aspheric element 5, thereby damaging the surface of the aspheric element 5.

[0045] As an embodiment of the present invention, a rectangular hole 411 is formed on the detection rod 41, and the rectangular hole 411 penetrates the detection array along the X-axis direction. A positioning rod 42 is installed in the connection block 4, and the positioning rod 42 passes through the rectangular hole 411. The positioning rod 42 is flat in shape, and baffles 421 are installed at both ends of the positioning rod 42. The baffles 421 locate and block the detection rods 41 at both ends of the detection array;

[0046] Since the detection rod 41 is relatively slender and the interior of the connecting block 4 is in a hollow state, the detection rod 41 is prone to shaking or tilting during use or displacement, thereby affecting the normal use of the detection device or affecting the accuracy of the detection. Therefore, a rectangular hole 411 is opened on the detection rod 41, and a flat positioning rod 42 is installed through the rectangular hole 411, so that the positioning rod 42 can position and constrain the detection rod 41, thereby avoiding the detection rod 41 from tilting, offsetting and the resulting jamming in the internal space of the connecting rod, thereby ensuring that the detection rod 41 can be used normally, and the accuracy of the detection results is guaranteed, and the detection error is reduced.

[0047] As an embodiment of the present invention, a contact line 412 is provided on the detection rod 41 and the baffle 421, and the detection rods 41 and the detection rods 41 and the baffle 421 are in contact with each other through the contact line 412, and the cross section of the contact line 412 is an arc shape;

[0048] By setting a contact line 412 on the surface of the detection rod 41 and the baffle 421, the contact between the detection rods 41 and the detection rods 41, and the detection rods 41 and the baffle 421 is changed from surface contact to line contact, so as to further reduce the friction force received by the detection rods 41 when they contact and move with each other, thereby facilitating the displacement of the detection rods 41 in the vertical direction, improving the accuracy of the detection result, and reducing the error;

[0049] At the same time, since the detection rods 41 and the detection rods 41, and the detection rods 41 and the baffle 421 are in contact and abutment with each other through the contact line 412, the position of the detection rods 41 on the positioning rods 42 is relatively fixed and evenly distributed, reducing the possibility of the detection rods 41 being skewed, offset or relatively concentrated on the positioning rods 42, thereby avoiding affecting the accuracy of the detection.

[0050] As an embodiment of the present invention, a silicone layer 22 is installed on the surface of the placement table 21, and the aspheric element 5 is placed on the silicone layer 22. A retaining edge 23 is provided at the edge of the silicone layer 22. The retaining edge 23 is elastic and fixes the aspheric element 5.

[0051] By installing a silicone layer 22 on the surface of the placement table 21, the silicone layer 22 is used to buffer and isolate the aspheric element 5, so as to prevent the aspheric element 5 from directly contacting the surface of the placement table 21, thereby reducing the possibility of damage to the surface of the aspheric element 5 on the placement table 21;

[0052] At the same time, since the edge of the silicone layer 22 is provided with a retaining edge 23, after the aspheric element 5 is placed on the silicone layer 22, the aspheric element 5 will be located inside the retaining edge 23 so that the retaining edge 23 can contact and fix the aspheric element 5, thereby improving the stability of the aspheric element 5 during the detection process, avoiding the aspheric element 5 from moving or falling during the detection process, and facilitating the smooth progress of the detection.

[0053] As an embodiment of the present invention, an airbag cavity 231 is provided in the retaining edge 23, and an inflation port 232 is provided in the retaining edge 23. The inflation port 232 is used to inflate and deflate the airbag cavity 231. After the airbag cavity 231 is inflated, it will further squeeze and fix the aspheric element 5.

[0054] There are a plurality of groups of the ribs 23, the diameter of the ribs 23 gradually decreases along the radial direction pointing to the center of the circle, and the thickness of the ribs 23 is the same;

[0055] Since the aspheric element 5 has various sizes and specifications, the airbag cavity 231 provided in the rib 23 is used to fill the gap between the rib 23 and the aspheric element 5, so as to fully ensure the fixing effect of the rib 23 on the aspheric element 5 and prevent the aspheric element 5 from moving during the detection process;

[0056] At the same time, when the diameter of the aspheric element 5 differs too much from the diameter of the rib 23, one or more additional ribs 23 are installed in the rib 23 according to the difference between the two, so as to reduce the diameter inside the rib 23 and ensure a good fixing effect on the aspheric element 5.

[0057] As an embodiment of the present invention, the silicone layer 22 is sticky;

[0058] A protruding capsule 24 is installed at the middle position of the silicone layer 22, and the surface of the protruding capsule 24 is non-sticky;

[0059] When the aspheric element 5 is tested, the contact portion between the aspheric element 5 and the silicone layer 22 will be affected by the viscosity of the silicone layer 22, and will be temporarily bonded to the silicone layer 22, thereby further fixing the aspheric element 5, avoiding the aspheric element 5 being fixed only by the retaining edge 23, ensuring the fixing effect of the aspheric element 5 during the test process, and avoiding the aspheric element 5 from moving or falling during the test;

[0060] At the same time, by setting a protruding capsule 24 in the middle position of the silicone layer 22, the aspheric element 5 will first contact the protruding capsule 24 before being placed on the silicone layer 22, so that the aspheric element 5 can be lifted and supported by the protruding capsule 24, thereby facilitating the staff to fine-tune the position of the aspheric element 5 on the silicone layer 22 to ensure that the position of the aspheric element 5 on the silicone layer 22 is correct. Afterwards, the staff presses the aspheric element 5 hard to make the aspheric element 5 squeeze the protruding capsule 24, compressing the protruding capsule 24 into the installation groove opened on the silicone layer 22, and making the surface of the aspheric element 5 contact and bond with the silicone layer 22 to ensure the fixing effect of the aspheric element 5.

[0061] The specific workflow is as follows:

[0062] During the inspection, the staff places the aspheric element 5 on the placement table 21, and then controls the inspection device through the controller, so that the slider 32 moves on the precision air-floating linear guide 31, so that the lower end of the detection rod 41 contacts the surface of the aspheric element 5, and then the displacement data of the detection rod 41 in the vertical direction is detected by the displacement sensor 43, and the generatrix profile of the surface of the aspheric element 5 is obtained through calculation and fitting. After that, the controller controls the precision air-floating turntable 2 to rotate to a set angle, and continues to detect and obtain another generatrix profile of the aspheric element 5. After repeated operations, after obtaining sufficient data, the complete surface profile of the aspheric element 5 is obtained by calculation and fitting through a computer, wherein the precision air-floating turntable 2 selects the air-floating turntable model QFR-300-PLUS-ABS-3 produced by Beijing Ruibang Precision Control Technology Co., Ltd.;

[0063] At the same time, since the multiple groups of detection rods 41 are arranged in sequence to form a detection array, when the surface of the aspheric element 5 is detected, the displacement data of the multiple groups of detection rods 41, that is, the coordinate data of the surface of the aspheric element 5, can be obtained at one time, thereby increasing the detection range of the surface of the aspheric element 5 during the detection process;

[0064] At the same time, since the detection rods 41 are arranged to form a detection array, when the slider 32 moves along the precision air-floating linear guide 31, the same point on the surface of the aspheric element 5 will be repeatedly passed and detected by different detection rods 41 in the detection array. At this time, since the thickness of the detection rod 41 is known data, the relative position of each detection rod 41 in the detection array can be clearly known according to the moving distance of the slider 32, so that the displacement data of each detection rod 41 can be corresponded to each point on the aspheric element 5, so that the repeated data detected at each point can be counted and analyzed by a computer, thereby improving the detection accuracy and reducing the error;

[0065] By setting an arc shape at the lower end of the detection rod 41, when the detection rod 41 detects the aspheric element 5, a point at the lower end of the detection rod 41 can contact the surface of the aspheric element 5;

[0066] During the detection process, the detection rods 41 will contact and rub against each other. By polishing the surfaces of the detection rod 41 and the positioning rod 42, the surfaces of the detection rod 41 and the positioning rod 42 are made smooth and the friction force is small, thereby reducing the friction force between the detection rods 41 when they move.

[0067] At the same time, there is a magnetic repulsion between the magnetic block 44 on the detection rod 41 and the magnetic block 44 at the top of the connecting block 4, so that the detection rod 41 tends to move downward under the action of the repulsive force, that is, the lower end of the detection rod 41 will be closely attached to the surface of the aspheric element 5;

[0068] A rectangular hole 411 is formed on the detection rod 41, and a flat positioning rod 42 is installed through the rectangular hole 411, so that the positioning rod 42 can position and constrain the detection rod 41;

[0069] By setting a contact line 412 on the surface of the detection rod 41 and the baffle 421, the contact between the detection rods 41 and the detection rods 41, and the detection rods 41 and the baffle 421 is changed from surface contact to line contact, further reducing the friction force between the detection rods 41 when they are in contact and movement.

[0070] By installing a silicone layer 22 on the surface of the placement table 21, the silicone layer 22 is used to buffer and isolate the aspherical element 5;

[0071] At the same time, since the edge of the silicone layer 22 is provided with a retaining edge 23, after the aspheric element 5 is placed on the silicone layer 22, the aspheric element 5 will be located inside the retaining edge 23, so that the retaining edge 23 can contact and fix the aspheric element 5;

[0072] Since the aspheric element 5 has various sizes and specifications, the airbag cavity 231 provided in the rib 23 is used to fill the gap between the rib 23 and the aspheric element 5, thereby fully ensuring the fixing effect of the rib 23 on the aspheric element 5;

[0073] At the same time, when the diameter of the aspherical element 5 differs too much from the diameter of the rib 23, one or more additional ribs 23 are installed in the rib 23 according to the difference between the two.

[0074] When the aspheric element 5 is tested, the contact portion between the aspheric element 5 and the silicone layer 22 will be affected by the viscosity of the silicone layer 22, and will be temporarily bonded to the silicone layer 22, thereby further fixing the aspheric element 5;

[0075] At the same time, by setting a protruding capsule 24 in the middle position of the silicone layer 22, the aspheric element 5 will first contact the protruding capsule 24 before being placed on the silicone layer 22, so that the aspheric element 5 can be lifted and supported by the protruding capsule 24, thereby facilitating the staff to fine-tune the position of the aspheric element 5 on the silicone layer 22. Afterwards, the staff presses the aspheric element 5 hard to make the aspheric element 5 squeeze the protruding capsule 24, compressing the protruding capsule 24 into the installation groove opened on the silicone layer 22, and making the surface of the aspheric element 5 contact and bond with the silicone layer 22.

[0076] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A non-spherical element contour detection device, comprising a workbench (1), a precision air-floating turntable (2) is installed on the workbench (1), a placement table (21) is installed on the precision air-floating turntable (2), the placement table (21) is used to place the non-spherical element (5) to be detected, brackets (3) are symmetrically installed on the left and right ends of the workbench (1), a precision air-floating linear guide (31) is installed on the bracket (3), a slider (32) is installed on the precision air-floating linear guide (31), a connecting block (4) is installed on the slider (32), a detection rod (41) and a displacement sensor (43) are installed in the connection block (4), and the lower end of the detection rod (41) is in contact with the surface of the non-spherical element (5); Features: The displacement sensor (43) is used to detect the displacement distance of the detection rod (41) in the vertical direction. The detection rod (41) is provided with a plurality of groups. The detection rods (41) are sequentially arranged in the connection block (4) along the X-axis direction to form a detection array. The detection rods (41) in the detection array are in contact with each other. The thickness of the detection rod (41) is known data. The relative position of each detection rod (41) in the detection array can be clearly known according to the moving distance of the slider (32), so that the displacement data of each detection rod (41) can be matched to each point on the aspheric element (5), so as to facilitate the statistical analysis of the detected repeated data at each point by a computer. The lower end of the detection rod (41) is in an arc shape; The surfaces of the detection rod (41) and the positioning rod (42) are polished; A magnetic block (44) is installed at the upper end of the detection rod (41) and the top of the connection block (4), and a magnetic repulsive force exists between the magnetic blocks (44); A rectangular hole (411) is provided on the detection rod (41), and the rectangular hole (411) penetrates the detection array along the X-axis direction. A positioning rod (42) is installed in the connection block (4), and the positioning rod (42) passes through the rectangular hole (411). The positioning rod (42) is flat in shape. Blocking pieces (421) are installed at both ends of the positioning rod (42), and the blocking pieces (421) are used to position and block the detection rods (41) at both ends of the detection array. The detection rod (41) and the baffle (421) are provided with a contact line (412); the detection rod (41) and the detection rod (41), and the detection rod (41) and the baffle (421) are in contact with each other through the contact line (412); and the cross section of the contact line (412) is in the shape of an arc; A silicone layer (22) is installed on the surface of the placement platform (21), the non-spherical element (5) is placed on the silicone layer (22), and a retaining edge (23) is provided at the edge of the silicone layer (22), and the retaining edge (23) fixes the non-spherical element (5); An airbag cavity (231) is provided in the retaining edge (23), and the airbag cavity (231) further compresses and fixes the aspheric element (5) after being inflated. There are a plurality of groups of the ribs (23), and the diameters of the ribs (23) gradually decrease along the radial direction pointing to the center of the circle.

2. The aspheric element contour detection device according to claim 1, characterized in that: The silica gel layer (22) is sticky; A protruding capsule (24) is installed at the middle position of the silicone layer (22), and the surface of the protruding capsule (24) is non-sticky.

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