Free-form mirror test fixture and test device

Abstract

The present invention discloses a free-form surface mirror test fixture and a test device, which relate to the technical field of head-up display device testing, wherein the free-form surface mirror test fixture comprises a bottom plate and a bottom support assembly; the bottom support assembly is arranged on the bottom plate and has a support member, the support member is a retractable flexible member, and the support member is configured to support the back of the free-form surface mirror. The technical solution provided by the present invention provides a universal free-form surface mirror test fixture to reduce the testing cost.

Description

Technical Field

[0001] The present invention relates to the technical field of head-up display equipment testing, and in particular to a free-form surface mirror testing tool and a testing device. Background Art

[0002] The Head-Up Display (HUD) system is an important product in the vehicle production and research and development process. It can project important information required for driving, such as vehicle speed, fuel level, navigation, and driving safety assistance, into the human eye. The projected image is located at a suitable position in front of the driver, so that the driver can always keep his head up, reducing the need for the driver to look down at the dashboard and navigation equipment, allowing them to keep their eyes on the road, improving reaction speed and driving concentration, and greatly improving driving safety.

[0003] The components of HUD mainly include PGU (Picture Generation Unit), free-form mirror and windshield, image processing unit, sensor and controller, power supply and cooling system. The free-form mirror is used to change the optical path of the image generated by PGU through secondary optical design, amplify the image and present it on the windshield to correct the optical distortion. The free-form mirror needs to be tested for performance during production and R&D.

[0004] At present, with the different types and shapes of automobiles, the related free-form surface mirrors will also be diverse. Different test fixtures are required for each free-form surface mirror, resulting in high testing costs. Summary of the invention

[0005] The main purpose of the present invention is to propose a free-form surface mirror testing tool, aiming to provide a universal free-form surface mirror testing tool to reduce the testing cost.

[0006] To achieve the above object, the present invention provides a free-form surface mirror testing tool, comprising:

[0007] Base plate;

[0008] A bottom support component is arranged on the bottom plate and has a support member, wherein the support member is a retractable flexible member and is configured to support the back of the free-form surface mirror.

[0009] In one embodiment, the bottom support assembly includes at least three support units, each of which has the support member;

[0010] The supporting member of at least one of the supporting units is configured to support the center of the back of the free-form surface mirror, and the supporting members of at least two of the supporting units are configured to respectively support two sides of the back of the free-form surface mirror.

[0011] In one embodiment, the support unit is detachably mounted on the bottom plate, and the support unit is configured such that its position is adjustable.

[0012] In one embodiment, the support unit comprises:

[0013] Support base; and

[0014] The mounting structure is arranged on the supporting base, and the supporting member is arranged on the mounting structure.

[0015] In one embodiment, the support member includes a plurality of support columns, and an array of the plurality of support columns is distributed on the mounting structure.

[0016] In one embodiment, the free-form surface mirror testing tool further includes a limiting assembly, wherein the limiting assembly is disposed on the base plate, and the limiting assembly is configured to position the free-form surface mirror.

[0017] In one embodiment, the limiting assembly includes at least three limiting members, at least two of the limiting members are configured to position one side of the free-form surface mirror, and at least one of the limiting members is configured to position the other side or center of the free-form surface mirror.

[0018] In one embodiment, the limiting member is a limiting cylinder.

[0019] In one embodiment, the limiting member is detachably provided on the bottom plate, and the limiting member is configured such that its position is adjustable.

[0020] In one embodiment, the free-form surface mirror testing fixture further includes a pressing structure, and the pressing structure is configured to press the free-form surface mirror.

[0021] In one embodiment, the pressing structure comprises:

[0022] Support structures; and

[0023] A pressing block is provided on the supporting structure in a liftable manner, and the pressing block is configured to have an adjustable downward pressure on the free-form surface mirror.

[0024] In one embodiment, the free-form surface mirror testing fixture further includes a height gauge, which is disposed on the supporting structure and is used to detect the pressing height of the pressing block.

[0025] To achieve the above object, the present invention further provides a testing device, comprising:

[0026] Such as the free-form mirror test fixture mentioned above;

[0027] A detector is used to detect the free-form surface mirror on the free-form surface mirror testing tooling.

[0028] The free-form mirror test fixture proposed by the present invention includes a bottom plate and a bottom support assembly, wherein the bottom support assembly has a support member. During testing, the free-form mirror can be placed on the bottom support assembly to support the back of the free-form mirror through the support member. Since the support member is a retractable flexible member, the retractable amount of the support member can be adjusted according to the type and shape of the free-form mirror, thereby ensuring the support effectiveness and stability of different free-form mirrors, so that different types and shapes of free-form mirrors can be adapted, and different test fixtures are not required for each free-form mirror. Therefore, the present solution provides a universal free-form mirror test fixture, which reduces the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention 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, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 A schematic structural diagram of an embodiment of a free-form surface mirror testing tool provided by the present invention;

[0031] Figure 2 A schematic structural diagram of a first embodiment of a free-form surface mirror test fixture provided by the present invention when the free-form surface mirror is fixed;

[0032] Figure 3 A schematic structural diagram of another perspective of an embodiment of a free-form surface mirror testing tool provided by the present invention when fixing the free-form surface mirror.

[0033] Description of Figure Numbers:

[0034]

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The present invention provides a free-form surface mirror testing tool 100 .

[0040] See also Figures 1 to 3 In one embodiment of the present invention, the free-form surface mirror testing tool 100 includes a base plate 10 and a bottom support assembly 20; the bottom support assembly 20 is arranged on the base plate 10 and has a support member 21, the support member 21 is a retractable flexible member, and the support member 21 is configured to support the back of the free-form surface mirror 200.

[0041] At present, with the different types and shapes of cars, the related free-form mirrors 200 will also be diverse. Different test fixtures need to be matched for each free-form mirror 200, resulting in high testing costs. In order to achieve the versatility of the test fixture, the free-form mirror test fixture 100 includes a base plate 10 and a bottom support assembly 20, wherein the bottom support assembly 20 has a support member 21. During the test, the free-form mirror 200 can be placed on the bottom support assembly 20 to support the back of the free-form mirror 200 through the support member 21. Since the support member 21 is a retractable flexible member, the retractable amount of the support member 21 can be adjusted according to the different types and shapes of the free-form mirror 200, thereby ensuring the support effectiveness and stability of different free-form mirrors 200, so that different types and shapes of free-form mirrors 200 can be adapted, and there is no need to match different test fixtures for each free-form mirror 200. Therefore, the present solution provides a universal free-form mirror test fixture 100, which reduces the testing cost.

[0042] It can be understood that the bottom plate 10 is used to support the bottom support assembly 20, and the size of the bottom plate 10 can be adjusted by splicing.

[0043] In actual application, the support member 21 can be a flexible member with a telescopic function, such as a telescopic spring, a spring, a rubber pad, a silicone pad, etc.

[0044] It should be noted that when the free-form surface mirror 200 is placed on the bottom support assembly 20, when the weight of the free-form surface mirror 200 is large enough, the gravity of the free-form surface mirror 200 itself can squeeze the support member 21 of the bottom support assembly 20, and the support member 21 can be deformed to adjust the amount of expansion and contraction so that the free-form surface mirror 200 is at the height required for testing; and when the weight of the free-form surface mirror 200 is insufficient, the downward pressure structure 40 can be used to press the free-form surface mirror 200, so that the support member 21 of the bottom support assembly 20 can be squeezed by the gravity of the free-form surface mirror 200 itself and the downward pressure of the downward pressure structure 40, and the support member 21 can be deformed to adjust the amount of expansion and contraction so that the free-form surface mirror 200 is at the height required for testing.

[0045] It is worth noting that the design of the bottom support assembly 20 is not arbitrary, but is closely related to the overall structure of the product (free-form mirror 200). In order to ensure the effectiveness and stability of the bottom support assembly 20 in supporting the product, the correlation between the support position and the product needs to be considered. By performing force simulation analysis on the product, suitable and uniform force points can be found. These force points can not only bear the weight of the product, but also maintain a stable support state when the product is locked in the test fixture.

[0046] Therefore, in actual application, the position of the bottom support assembly 20 is set according to the force point of the free-form surface mirror 200, and the center, both sides or other positions of the back of the free-form surface mirror 200 can be supported, as long as the free-form surface mirror 200 can be effectively supported.

[0047] In the stress simulation stage, the stress of the product under different working conditions is simulated, and the support member 21 is finely adjusted accordingly. By continuously adjusting the length and flexibility of the support member 21, it is ensured that the gravity of the product and the squeezing of the support member 21 by the pressing structure 40 can be evenly distributed, avoiding the problem of excessive local stress.

[0048] After determining the appropriate support position, the height of the bottom support position is transformed according to the back shape of the product. This transformation process ensures that the bottom support can fit the back structure of the product closely, thereby providing better support effects. At the same time, the shape information of the back structure of the product can also be recorded, so that when other products of the same type are replaced later, the position and height of the bottom support can be adjusted quickly and accurately to ensure the stability of the support position.

[0049] See also Figures 1 to 3 In one embodiment of the present invention, the bottom support assembly 20 includes at least three support units 20a, each support unit 20a has a support member 21; the support member 21 of at least one support unit 20a is configured to support the center of the back of the free-form surface mirror 200, and the support members 21 of at least two support units 20a are configured to support the two sides of the back of the free-form surface mirror 200 respectively.

[0050] In this embodiment, at least three support units 20a are arranged to distribute the at least three support units 20a in different positions, wherein at least one support unit 20a supports the center of the back of the free-form surface mirror 200, and at least two support units 20a support both sides of the back of the free-form surface mirror 200. This can effectively support appropriate force points of the free-form surface mirror 200, thereby ensuring that a stable support state is better maintained during the test process.

[0051] In actual application, the length and flexibility of the support members 21 in each support unit 20a may be the same or different, and may be selected and adjusted according to the shape of the back of the free-form surface mirror 200, as long as the support members 21 in each support unit 20a can fit tightly against the back of the free-form surface mirror 200.

[0052] In the embodiment shown in the figure, the support unit 20a is detachably provided on the bottom plate 10, and the support unit 20a is configured to be adjustable in position. After performing force simulation analysis on different free-form surface mirrors 200 to find appropriate and uniform force points corresponding to different free-form surface mirrors 200, this embodiment adjusts the position of the support unit 20a so that the support unit 20a is set at the corresponding force point position, so that the support unit 20a can effectively support different free-form surface mirrors 200, thereby improving the versatility and flexibility of use.

[0053] In actual application, the support unit 20a can be detachably mounted on the bottom plate 10 by plugging, screw connection, clamping, magnetic attraction, etc. Of course, in one embodiment, in order to facilitate the rapid disassembly and assembly of the support unit 20a and to quickly adjust the position of the support unit 20a, a plurality of plug holes 11 can be provided on the bottom plate 10, and plug posts can be provided at the bottom of the support unit 20a, so that the plug posts of the support unit 20a can be selectively plugged into the corresponding plug holes 11, so that the rapid adjustment of the support unit 20a can be achieved, and the installation reliability of the support unit 20a can be achieved.

[0054] In the embodiment shown in the figure, the support unit 20 a includes a support base 22 and a mounting structure 23 ; the mounting structure 23 is disposed on the support base 22 , and the support member 21 is disposed on the mounting structure 23 .

[0055] In this embodiment, the support member 21 can be installed on the mounting structure 23, and then the mounting structure 23 can be installed on the support base 22, so that the mounting structure 23 and the support member 21 can be supported by the support base 22, which can improve the installation reliability of the support member 21 and further improve the support stability of the support member 21 on the free-form surface mirror 200.

[0056] In the embodiment shown in the figure, the mounting structure 23 can be detachably mounted on the support base 22. When a support member 21 of different length or flexibility needs to be replaced, the support member 21 can be removed from the support base 22 through the mounting structure 23, and then a suitable support member 21 can be installed on the support base 22 through the mounting structure 23. This makes it easy to replace the support member 21.

[0057] In the embodiment shown in the figure, the support member 21 includes a plurality of support columns 211, and the plurality of support columns 211 are distributed in an array on the mounting structure 23. Since the bottom of the free-form surface mirror 200 is a curved surface, in order to enable the support member 21 to better fit the bottom of the free-form surface mirror 200, the present embodiment arranges the support member 21 into a plurality of support columns 211 distributed in an array, so that the bottom of the free-form surface mirror 200 is uniformly supported by the plurality of support columns 211, thereby achieving the effect of improving the support stability of the free-form surface mirror 200.

[0058] See also Figures 1 to 3 In one embodiment of the present invention, the free-form surface mirror testing fixture 100 further includes a limiting assembly 30 , which is disposed on the base plate 10 , and the limiting assembly 30 is configured to position the free-form surface mirror 200 .

[0059] In this embodiment, a limiting assembly 30 is provided on the base plate 10. During testing, the free-form surface mirror 200 is placed on the bottom supporting assembly 20 so as to support the back of the free-form surface mirror 200 through the supporting member 21. At the same time, the free-form surface mirror 200 is positioned through the limiting assembly 30 so as to accurately position the free-form surface mirror 200 at the position required for testing, thereby improving the testing accuracy of the free-form surface mirror 200.

[0060] In actual application, the limiting component 30 can use a surface-to-surface limiting method to position the free-form surface mirror 200, that is, the limiting component 30 has a limiting surface, so that the limiting surface is tightly attached to the side of the free-form surface mirror 200 to position the free-form surface mirror 200; or, the limiting component 30 can also use a point-to-surface limiting method to position the free-form surface mirror 200, that is, the limiting component 30 has a limiting convex point, so that the limiting convex point is tightly attached to the side of the free-form surface mirror 200, and the free-form surface mirror 200 can also be positioned, as long as the free-form surface mirror 200 can be accurately positioned at the position required for testing.

[0061] In the embodiment shown in the figure, the limiting assembly 30 includes at least three limiting members 31, at least two limiting members 31 are configured to position one side of the free-form surface mirror 200, and at least one limiting member 31 is configured to position the other side or center of the free-form surface mirror 200.

[0062] In this embodiment, at least three limit members 31 are provided, so that at least two limit members 31 are used to position one side of the free-form surface mirror 200, and at least one limit member 31 is used to position the other side or the center of the free-form surface mirror 200. The position of a surface can be determined by at least three limit members 31, thereby improving the positioning efficiency and accuracy of the free-form surface mirror 200.

[0063] It can be understood that at least two stoppers 31 are provided in the x direction to determine at least two points in the x direction, and at least one stopper 31 is provided in the y direction to determine a point in the y direction, so as to realize the confirmation of the position of the surface. This design makes full use of the point positioning principle in geometry, that is, the position of a plane can be determined by three non-collinear points.

[0064] In actual application, the limiting member 31 can be a limiting structural member in the shape of a cylinder, a plate, a strip, a sheet, etc.

[0065] In the embodiment shown in the figure, the limiting member 31 may be a limiting cylinder.

[0066] This embodiment uses a limiting cylinder as a contact point, which not only ensures the stability of the contact between the limiting member 31 and the free-form mirror 200, but also facilitates the precise adjustment of the limiting member 31. After confirming the positioning direction, in the x direction, this embodiment selects two limiting cylinders as contact points, and these two contact points are respectively located at the two ends of one side of the free-form mirror 200. The position of the free-form mirror 200 in the x direction can be determined by the two limiting cylinders. In the y direction, this embodiment selects a limiting cylinder as a contact point, and the contact point is located at the center or one side of the free-form mirror 200, which is used to determine the position of the free-form mirror 200 in the y direction.

[0067] In the embodiment shown in the figure, the stopper 31 is detachably provided on the bottom plate 10, and the stopper 31 is configured to be adjustable in position. For cars of different types and shapes, the corresponding free-form mirrors 200 mostly have different structures. Therefore, when the stopper assembly 30 is applied to free-form mirrors 200 of different types and shapes, the positions required for positioning are different. After determining the position where the current free-form mirror 200 needs to be positioned, this embodiment disassembles and adjusts the position of the stopper 31 to ensure that the stopper 31 does not interfere with the normal installation of the free-form mirror 200, so that the stopper 31 is positioned at the position where the current free-form mirror 200 needs to be positioned, so that the stopper 31 can effectively position different free-form mirrors 200. This design takes into account the diversity and complexity of HUD products and improves the versatility and flexibility of the stopper assembly 30.

[0068] In actual application, the limiter 31 can be detachably mounted on the bottom plate 10 by plugging, screw connection, clamping, magnetic attraction, etc. Of course, in one embodiment, in order to facilitate the rapid disassembly and assembly of the limiter 31 and to quickly adjust the position of the limiter 31, since the bottom plate 10 is provided with a plurality of plug holes 11, the bottom end of the limiter 31 can be selectively plugged into the corresponding plug hole 11, so that the limiter 31 can be quickly adjusted and the installation reliability of the limiter 31 can be improved.

[0069] It should be noted that when the free-form surface mirror testing fixture 100 is fixing multiple free-form surface mirrors 200 of the same size and shape, the positions of at least three limit members 31 are not changed. Multiple free-form surface mirrors 200 of the same size and shape can be quickly positioned in turn through at least three limit members 31, which can improve the positioning efficiency and accuracy of the free-form surface mirrors 200.

[0070] See also Figures 1 to 3In one embodiment of the present invention, the free-form surface mirror testing fixture 100 further includes a pressing structure 40 , and the pressing structure 40 is configured to press the free-form surface mirror 200 .

[0071] For a free-form surface mirror 200 that is not heavy enough, this embodiment uses a downward pressing structure 40 to press the free-form surface mirror 200, so that the support member 21 of the bottom support assembly 20 is squeezed by the gravity of the free-form surface mirror 200 itself and the downward pressure of the downward pressing structure 40, so that the free-form surface mirror 200 can accurately reach the height required for testing, thereby improving the test accuracy of the free-form surface mirror 200.

[0072] In actual application, the downward pressure of the downward pressure structure 40 on the free-form surface mirror 200 can be a fixed downward pressure or an adjustable downward pressure.

[0073] Furthermore, the pressing structure 40 can be pressed on the corners of the free-form mirror 200, or on the middle or side of the free-form mirror 200, as long as downward pressure can be applied to the free-form mirror 200. Of course, in one embodiment, in order to avoid the pressing structure 40 interfering with the test effect of the tester on the free-form mirror 200, the pressing structure 40 can be pressed on the corners of the free-form mirror 200. Optionally, in order to improve the pressing effect on the free-form mirror 200, corresponding pressing structures 40 can be provided at the four angles of the free-form mirror 200 for pressing.

[0074] In the embodiment shown in the figure, the pressing structure 40 includes a supporting structure 41 and a pressing block 42 ; the pressing block 42 is movably disposed on the supporting structure 41 , and the pressing block 42 is configured to have an adjustable pressing force on the free-form surface mirror 200 .

[0075] For cars of different types and shapes, the weights of the matched free-form surface mirrors 200 are different. Therefore, different downward pressures need to be applied to free-form surface mirrors 200 of different weights. In this embodiment, the downward pressure of the downward pressure block 42 on the free-form surface mirror 200 can be adjusted by arranging the downward pressure block 42 on the support structure 41 in a liftable manner, so that the downward pressure height of the downward pressure block 42 can be adjusted for free-form surface mirrors 200 of different weights, so as to apply different downward pressures to the free-form surface mirrors 200 of different weights, thereby improving the versatility and flexibility of the downward pressure structure 40.

[0076] In the embodiment shown in the figure, the support structure 41 can also be detachably mounted on the base plate 10. For free-form surface mirrors 200 of different sizes and shapes, the position of the pressing block 42 can be adjusted through the support structure 41 so that the pressing block 42 can press the free-form surface mirrors 200 of different sizes and shapes, thereby improving the versatility and flexibility of the pressing structure 40.

[0077] As some examples, an adjusting screw can be used to adjust the downward pressure of the lower pressure block 42 on the free-form surface mirror 200. When the adjusting screw is tightened, the downward pressure of the lower pressure block 42 on the free-form surface mirror 200 is increased, and when the adjusting screw is loosened, the downward pressure of the lower pressure block 42 on the free-form surface mirror 200 is reduced.

[0078] In the embodiment shown in the figure, the free-form mirror testing fixture 100 further includes a height gauge 50 . The height gauge 50 is disposed on the supporting structure 41 . The height gauge 50 is used to detect the pressing height of the pressing block 42 .

[0079] To solve the problem of uniform and stable force when pressing down the free-form surface mirror 200, this embodiment provides a height gauge 50 on the support structure 41 to detect the pressing height of the pressing block 42 and display the corresponding hours on the height gauge 50. By recording the hours, it can ensure that the pressing block 42 can be quickly adjusted to the corresponding height during the next test, so that the expansion and contraction amount of the support member 21 during the next test is consistent with the expansion and contraction amount of the support member 21 during the previous test, thereby improving the test efficiency and test accuracy.

[0080] The present invention also proposes a testing device, which includes a free-form surface mirror testing tool 100 and a tester. The specific structure of the free-form surface mirror testing tool 100 refers to the above-mentioned embodiment. Since this testing device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0081] The detector is used to detect the free-form surface mirror 200 on the free-form surface mirror testing fixture 100 so as to perform a performance test on the free-form surface mirror 200 .

[0082] The performance tests were conducted on the traditional special tooling and the free-form surface mirror test tooling 100 provided by this solution, and the results are as follows:

[0083] The measured optical performance results of the traditional special tooling are shown in Tables 1 and 2 below:

[0084] Table 1: 3D Comparison error distribution (3D surface height error)

[0085]

[0086] Table 2: 3D Comparison slope error distribution (3D surface slope error)

[0087]

[0088] The results of optical performance measured using universal tooling are shown in Tables 3 and 4 below:

[0089] Table 3: 3D Comparison error distribution

[0090] Item Value Unit Item Value Unit Comparison PV 222.300 um RMS 51.340 um Remove power Upper limit 149.430 um Lower limit -77.870 um Shrink size 0.0 mm Sample interval 0.5 mm Cursor interval 25 mm

[0091] Table 4: 3D Comparison slope error distribution

[0092]

[0093]

[0094] The optical performance results of different types of free-form surface mirrors 200 measured by the free-form surface mirror test fixture 100 of the present solution are shown in Tables 5 to 12 below:

[0095] Table 5: 3D Comparison error distribution

[0096] Item Value Unit Item Value Unit Comparison PV 147.220 um RMS 33.110 um Remove power Upper limit 94.600 um Lower limit -52.620 um Shrink size 1.0 mm Sample interval 0.5 mm Cursor interval 25 mm

[0097] Table 6: 3D Comparison error distribution

[0098] Item Value Unit Item Value Unit Comparison PV 49.420 um RMS 11.950 um Remove power Upper limit 15.370 um Lower limit -34.050 um Shrink size 1.0 mm Sample interval 0.5 mm Cursor interval 25 mm

[0099] Table 7: 3D Comparison slope error distribution

[0100] Item Value Unit Item Value Unit Norm PV 2.650 mrad RMS 0.662 mrad Remove power Upper limit 2.809 mrad Lower limit 0.159 mrad Shrink size 1.0 mm Sample interval 0.5 mm Cursor interval 25 mm

[0101] Table 8: 3D Comparison slope error distribution

[0102] Item Value Unit Item Value Unit Norm PV 1.773 mrad RMS 0.423 mrad Remove power Upper limit 1.776 mrad Lower limit 0.003 mrad Shrink size 1.0 mm Sample interval 0.5 mm Cursor interval 25 mm

[0103] Table 9: Curvature map image (slope error image)

[0104]

[0105] Table 10: Curvature map image

[0106] Item Value Unit Item Value Unit Curvature PV 0.105 DPT RMS 0.007 DPT Curvature type Average Max value 0.066 DPT Min value -0.038 DPT Shrink size 1.0 mm Sample interval 0.5 mm Cursor interval 25 mm

[0107] Table 11: Polynomial fit image

[0108] Item Value Unit Item Value Unit PV 8.726 um RMS 0.777 um X fit order 8 Y fit order 8 Sample interval 0.5 mm Cursor interval 25 mm

[0109] Table 12: Polynomial fit image

[0110] Item Value Unit Item Value Unit PV 1.193 um RMS 0.080 um X fit order 8 Y fit order 8 Sample interval 0.5 mm Cursor interval 25 mm

[0111] The optical performance results of the free-form surface mirror 200 of the same type measured by the free-form surface mirror test fixture 100 of this solution are shown in Tables 13 and 14 below:

[0112] Table 13: 3D Comparison error distribution

[0113]

[0114]

[0115] Table 14: 3D Comparison error distribution

[0116] Item Value Unit Item Value Unit Comparison PV 240.940 um RMS 49.930 um Remove power Upper limit 171.180 um Lower limit -69.760 um Shrink size 0.0 mm Sample interval 0.5 mm Cursor interval 25 mm

[0117] By comparing the above measured data, it can be found that the free-form surface mirror test fixture 100 used in this solution is basically consistent with the stability of the current non-standardized special fixture, and can be adjusted to adapt to different types of HUD free-form surface mirrors 200 to ensure its applicability to different products; this design not only improves positioning efficiency and accuracy, but also enhances the versatility and flexibility of the product.

[0118] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A free-form surface mirror testing tool, characterized in that: include: Base plate; A bottom support component is arranged on the bottom plate and has a support member, wherein the support member is a retractable flexible member and is configured to support the back of the free-form surface mirror.

2. The free-form surface mirror testing tool as claimed in claim 1, characterized in that: The bottom support assembly comprises at least three support units, each of which has the support member; The supporting member of at least one of the supporting units is configured to support the center of the back of the free-form surface mirror, and the supporting members of at least two of the supporting units are configured to respectively support two sides of the back of the free-form surface mirror.

3. The free-form surface mirror testing tool as claimed in claim 2, characterized in that: The support unit is detachably provided on the bottom plate, and the position of the support unit is configured to be adjustable.

4. The free-form surface mirror testing tool as claimed in claim 2, characterized in that: The support unit comprises: Support base; and The mounting structure is arranged on the supporting base, and the supporting member is arranged on the mounting structure.

5. The free-form surface mirror testing tool as claimed in claim 4, characterized in that: The support member includes a plurality of support columns, and an array of the plurality of support columns is distributed on the mounting structure.

6. The free-form surface mirror testing tool as claimed in any one of claims 1 to 5, characterized in that: The free-form surface mirror testing tool further includes a position limiting component, which is disposed on the base plate and is configured to position the free-form surface mirror.

7. The free-form surface mirror testing tool as claimed in claim 6, characterized in that: The limiting assembly includes at least three limiting members, at least two of the limiting members are configured to position one side of the free-form surface mirror, and at least one of the limiting members is configured to position the other side or center of the free-form surface mirror.

8. The free-form surface mirror testing tool as claimed in claim 7, characterized in that: The limiting member is a limiting cylinder.

9. The free-form surface mirror testing tool as claimed in claim 7, characterized in that: The limiting member is detachably arranged on the bottom plate, and the limiting member is configured such that its position is adjustable.

10. The free-form surface mirror testing tool as claimed in any one of claims 1 to 5, characterized in that: The free-form surface mirror testing fixture further comprises a pressing structure, and the pressing structure is configured to press the free-form surface mirror.

11. The free-form surface mirror testing tool as claimed in claim 10, characterized in that: The pressing structure comprises: Support structures; and A pressing block is provided on the supporting structure in a liftable manner, and the pressing block is configured to have an adjustable downward pressure on the free-form surface mirror.

12. The free-form surface mirror testing tool as claimed in claim 11, characterized in that: The free-form surface mirror testing fixture further comprises a height gauge, which is arranged on the supporting structure and is used to detect the pressing height of the pressing block.

13. A testing device, characterized in that: include: The free-form surface mirror testing fixture as claimed in any one of claims 1 to 12; A detector is used to detect the free-form surface mirror on the free-form surface mirror testing tooling.

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