Long-focus MTF (Modulation Transfer Function) tester

Abstract

The invention belongs to the technical field of lenses, and discloses a long-focus MTF testing machine which comprises a rack, a supporting device, a camera device and a driving device, the supporting device is installed in the rack and comprises a reticle, a to-be-tested lens is placed on the supporting device, and the reticle can be close to or away from the to-be-tested lens in the first direction; the supporting device can drive the to-be-detected lens to move in the second direction and the third direction, the camera device comprises at least two layers of camera sets arranged in the first direction, the driving device is arranged in the rack, the camera device is installed on the driving device, and the driving device is used for driving the camera device to be close to or away from the to-be-detected lens in the first direction. According to the telephoto MTF testing machine, the application range of the telephoto lens is enlarged, the angle range of the detection camera is enlarged, the operation is simplified, and the detection efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of lens technology, and more particularly to a telephoto MTF testing machine. Background Technology

[0002] Currently, the inspection of telephoto lenses typically relies on actual photographs to assess the lens assembly quality. This method is not only cumbersome due to repeated manual adjustments, but also inefficient and lacks precision. While existing technologies utilize cameras with adjustable angles and heights for telephoto lens inspection, their limited range and applicability prevent them from accurately and efficiently providing feedback on the lens's performance and parameters. Therefore, expanding the applicability of telephoto lenses, increasing the angle range of inspection cameras, simplifying operations, and improving inspection efficiency are problems that researchers in this field need to address. Summary of the Invention

[0003] The purpose of this invention is to provide a long-focal-length MTF testing machine to expand the applicability of long-focal-length lenses, increase the angular range of the testing camera, simplify operation, and improve testing efficiency.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] Long-zoom MTF testing equipment, including:

[0006] frame;

[0007] A support device is installed in the frame and includes a reticle. The lens under test is placed on the support device, and the reticle can move closer to or further away from the lens under test in a first direction. The support device can drive the lens under test to move in a second direction and a third direction.

[0008] A camera device and a driving device, the camera device comprising at least two layers of camera groups arranged along the first direction, the driving device being disposed in the frame, the camera device being mounted on the driving device, and the driving device being used to drive the camera device to move closer to or further away from the lens under test along the first direction.

[0009] Optionally, the frame is provided with a support platform, which includes a displacement adjustment component and an auxiliary component. Both the displacement adjustment component and the auxiliary component are mounted on the support platform. The displacement adjustment component is used to adjust the movement of the lens under test along the second direction and the third direction. The reticle is mounted on the auxiliary component, which is used to drive the reticle to move along the first direction.

[0010] Optionally, the displacement adjustment assembly includes a first slide and a second slide, the lens to be tested is placed on the first slide, the first slide is slidable along the second direction, the first slide is fixed on the second slide, and the second slide is slidably disposed on the support platform along the third direction.

[0011] Optionally, the auxiliary component includes a third slide, which is slidably disposed on the support platform along the first direction. The reticle is mounted on the third slide and can pass through the second slide and the first slide in sequence for testing the lens under test.

[0012] Optionally, the camera device includes a first camera group and a second camera group spaced apart along the first direction, and both are connected to the driving device, which can drive both to simultaneously move closer to or further away from the lens under test along the first direction.

[0013] Alternatively, the first camera group may include a plurality of first adjustment frames, each on which a plurality of first cameras are slidably disposed.

[0014] Optionally, the second camera group includes multiple second adjustment frames and multiple third adjustment frames, each on which multiple second cameras are slidably mounted.

[0015] Alternatively, the camera device may include multiple cameras with an adjustment angle range of 5°-45°.

[0016] Optionally, the driving device includes a drive motor and a support plate, and the camera group in the camera device is respectively installed on the upper and lower sides of the support plate along the first direction. The drive motor can drive the support plate to move closer to or away from the lens to be tested along the first direction.

[0017] Optionally, a through hole is provided on the support plate along the first direction, through which the camera group above the support plate along the first direction can test the lens under test.

[0018] The beneficial effects of this invention are:

[0019] In this invention, a support device ensures stable installation of the lens under test, and a reticle provides the pattern required for lens testing. The reticle can move closer to or further away from the lens under test along a first direction to facilitate various tests and ensure clear imaging. Furthermore, the support device can drive the lens under test to move along a second and third direction, facilitating center focusing and improving operational efficiency. Specifically, the camera device includes at least two camera layers, effectively expanding the angle adjustment range of the actual shooting camera and enabling various adjustment schemes to meet the focal length and measurement angle requirements of different lenses under test, improving detection accuracy and expanding its applicability. The drive device, in conjunction with the camera device, moves the camera device along the first direction, allowing it to move closer to or further away from the lens under test, simplifying operation and improving efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the long-focal-length MTF testing machine described in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the long-focal-length MTF testing machine with the frame portion hidden, as described in an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of the long-focal-length MTF testing machine with the frame hidden, as described in an embodiment of the present invention.

[0023] Figure 4 This is an isometric view of the long-focal-length MTF testing machine with the frame hidden, as described in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the drive device in the long-focal-length MTF tester according to an embodiment of the present invention;

[0025] Figure 6 This is a first isometric schematic diagram of the support device in the long-focal-length MTF testing machine according to an embodiment of the present invention;

[0026] Figure 7 This is a second isometric schematic diagram of the support device in the long-focal-length MTF testing machine according to an embodiment of the present invention;

[0027] Figure 8 This is a partial structural schematic diagram of the support device in the long-focal-length MTF testing machine described in an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the first camera group and part of the driving device in the long-zoom MTF tester described in the embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure of the first camera group in the long-zoom MTF tester described in an embodiment of the present invention;

[0030] Figure 11 This is a first isometric schematic diagram of the first adjustment frame in the long-focal-length MTF testing machine according to an embodiment of the present invention;

[0031] Figure 12 This is a second isometric schematic diagram of the first adjustment frame in the long-focal-length MTF testing machine described in this embodiment of the invention;

[0032] Figure 13 This is a schematic diagram of the structure of the second camera group in the long-zoom MTF tester described in an embodiment of the present invention;

[0033] Figure 14 This is a partially enlarged schematic diagram of the second camera group in the long-zoom MTF tester described in this embodiment of the invention;

[0034] Figure 15 This is a first isometric schematic diagram of the second adjustment frame in the long-focal-length MTF testing machine described in this embodiment of the invention;

[0035] Figure 16 This is a second isometric schematic diagram of the second adjustment frame in the long-focal-length MTF testing machine described in this embodiment of the invention;

[0036] Figure 17 This is a first isometric schematic diagram of the third adjustment frame in the long-focal-length MTF testing machine described in this embodiment of the invention;

[0037] Figure 18 This is a second isometric schematic diagram of the third adjustment frame in the long-focal-length MTF testing machine described in this embodiment of the invention;

[0038] Figure 19 This is a schematic diagram of the connecting component in the long-focal-length MTF testing machine according to an embodiment of the present invention.

[0039] In the picture:

[0040] 100 - rack; 200 - receiving platform; 300 - support platform;

[0041] 10-Support device; 11-Reticle plate; 12-Support plate; 13-First slide table; 141-First guide post; 142-First slide rail; 15-Second slide table; 161-Second guide post; 162-Second slide rail; 17-Auxiliary component; 171-Third slide rail; 172-Third slide table; 173-Fixing plate; 18-Fixing plate;

[0042] 20-First camera group; 21-Connecting top plate; 211-Fixed component; 212-Connecting plate; 213-Support column; 22-First adjusting frame; 221-First adjusting part; 222-First fixing part; 223-First adjusting groove; 224-First limiting step; 225-First scale line; 23-First mounting plate; 24-Second mounting plate; 25-First camera;

[0043] 30-Second camera assembly; 31-Second adjusting frame; 311-Second adjusting part; 312-Second fixing part; 313-Second adjusting groove; 314-Second limiting step; 315-Second scale line; 32-Third adjusting frame; 321-Third adjusting groove; 322-Third limiting step; 323-Third scale line; 324-Fixed end; 33-Connector; 331-First fixing foot; 332-Second fixing foot; 34-Third mounting plate; 35-Fourth mounting plate; 36-Second camera;

[0044] 40-Drive device; 41-Drive motor; 411-Hydraulic rod; 42-Lower base plate; 43-Shelf plate; 44-Support plate; 441-Through hole; 45-Upper top plate; 46-Guide rod; 47-Fixed side plate. Detailed Implementation

[0045] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0046] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] Currently, the inspection of telephoto lenses typically relies on actual photographs to assess the lens assembly quality. This method is not only cumbersome due to repeated manual adjustments, but also inefficient and lacks precision. While existing technologies utilize cameras with adjustable angles and heights for telephoto lens inspection, their limited range and applicability prevent them from accurately and efficiently providing feedback on the lens's performance and parameters. Therefore, expanding the applicability of telephoto lenses, increasing the angle range of inspection cameras, simplifying operations, and improving inspection efficiency are problems that researchers in this field need to address.

[0049] The technical solution of this embodiment will be further described below with reference to the accompanying drawings and specific implementation methods.

[0050] like Figures 1 to 19 As shown, this embodiment provides a long-focal-length MTF (Modulation Transfer Function) tester, including a frame 100, a support device 10, a camera device, and a drive device 40. The support device 10 is installed in the frame 100 and includes a reticle 11. The lens under test is placed on the support device 10, and the reticle 11 can move closer to or further away from the lens under test along a first direction. The support device 10 can drive the lens under test to move along a second direction and a third direction. The camera device includes at least two layers of camera groups arranged along the first direction. The drive device 40 is disposed in the frame 100, and the camera device is installed on the drive device 40. The drive device 40 is used to drive the camera device to move closer to or further away from the lens under test along the first direction.

[0051] Specifically, in this embodiment, the support device 10 ensures stable installation of the lens under test, and the reticle 11 provides the pattern required for lens testing. Simultaneously, the reticle 11 can move closer to or further away from the lens under test along the first direction to facilitate various tests and ensure clear imaging of the lens. Furthermore, the support device 10 can drive the lens under test to move along the second and third directions, facilitating center focusing and improving operational efficiency. Specifically, the camera device includes at least two camera groups, effectively expanding the angle adjustment range of the actual shooting camera and enabling various adjustment schemes to meet the focal length and measurement angle requirements of different lenses under test, improving detection accuracy and expanding its applicability. Combined with the drive device 40, the camera device moves along the first direction, allowing it to move closer to or further away from the lens under test, simplifying operation and improving operational efficiency.

[0052] The specific structure of the long-focal-length MTF testing machine in this embodiment is described below.

[0053] like Figures 1-4 As shown, in this embodiment, the long-focal-length MTF testing machine includes a frame 100, a support device 10, a camera device, and a drive device 40. The camera device includes at least two camera groups, and all camera groups in the camera device are connected to the drive device 40. Both the drive device 40 and the support device 10 are mounted in the frame 100. Exemplarily, in this embodiment, the height direction of the frame 100 is set as the first direction, the length direction as the second direction, and the width direction as the third direction, wherein each of the first, second, and third directions is perpendicular to the others. Specifically, the lens under test is placed on the support device 10, which is equipped with a reticle 11 and a light source. The camera device includes multiple cameras, and the positions and angles of the cameras are adjustable. Through the cooperation of the support device 10 and the camera device, the angles and positions of the multiple cameras can be adjusted to meet the focal length and measurement angle of different lenses under test. After the lens under test is centered, it can clearly image the pattern on the reticle 11 under the action of the light source, and capture and record the image using the camera. This provides accurate and efficient feedback on the performance and parameters of the lens under test.

[0054] Optionally, in this embodiment, after the lens under test is placed on the support device 10, it can move along the second direction and the third direction under the drive of the support device 10 to facilitate focusing. Further, the reticle 11 can move closer to or further away from the lens under test along the first direction to facilitate accurate imaging of the lens under test. Exemplarily, in this embodiment, the camera device has at least two camera groups arranged along the first direction to adjust the position and angle of the lens under test, thereby improving the testing efficiency of the focal length and measurement angle of the lens under test. Further, the camera device is mounted on the drive device 40, and under the action of the drive device 40, multiple camera groups in the camera device can be driven to simultaneously move closer to or further away from the lens under test along the first direction, improving testing efficiency.

[0055] like Figure 1 and Figure 2 As shown, in this embodiment, a receiving platform 200 is provided on the outside of the frame 100 to facilitate the placement of the lens under test or other auxiliary devices. Furthermore, a support platform 300 is provided inside the frame 100, and the support device 10 is installed on the support platform 300 to ensure the stable placement of the lens under test.

[0056] Combination Figures 5-8 As shown, in this embodiment, the support device 10 includes a displacement adjustment component and an auxiliary component 17, both of which are mounted on the support platform 300. The lens under test is placed on the displacement adjustment component, thereby adjusting the lens under test through the displacement adjustment component to allow it to move along the second and third directions to ensure center focus. Correspondingly, the reticle 11 is mounted on the auxiliary component 17, which can drive the reticle 11 to move along the first direction, thereby adjusting the distance between the lens under test and the pattern on the reticle 11 to meet the testing requirements.

[0057] like Figure 6 As shown, in this embodiment, the displacement adjustment assembly includes a first slide 13, a first guide post 141, and a first slide rail 142. Specifically, both the first guide post 141 and the first slide rail 142 extend along a second direction, and the first slide 13 is slidably mounted on the first guide post 141 and the first slide rail 142 along the second direction. This allows the first slide 13 to move in the second direction under the driving action of the first slide rail 142 and the guiding action of the first guide post 141. Specifically, a support plate 12 is provided on the first slide 13 to limit the mounting of the lens under test, preventing the lens from shifting during movement.

[0058] Accordingly, in this embodiment, the displacement adjustment assembly further includes a second slide 15, a second guide post 161, and a second slide rail 162. Specifically, the second guide post 161 and the second slide rail 162 both extend in a third direction, and the second slide 15 is slidably mounted on the second guide post 161 and the second slide rail 162 in the third direction. This allows the second slide 15 to move in the third direction under the driving action of the second slide rail 162 and the guiding action of the second guide post 161. Specifically, the second guide post 161 and the second slide rail 162 are both mounted on the support platform 300 to ensure stable installation of the displacement adjustment assembly.

[0059] Optionally, the second slide 15 is slidably mounted on the second guide post 161 and the second slide rail 162 along a third direction, enabling it to slide on the support platform 300. The first guide post 141 and the first slide rail 142 are fixed on the second slide 15, so that when the second slide 15 moves along a third direction, the first guide post 141 and the first slide rail 142 drive the first slide 13 on them to move together with the second slide 15 along the third direction. Furthermore, the lens under test is mounted on the support plate 12 on the first slide 13, and under the limiting action of the support plate 12, the lens under test can move synchronously with the first slide 13 along a second direction, thereby realizing the movement of the lens under test in both the second and third directions.

[0060] Furthermore, along the first direction, a test channel is provided through the first slide 13 and the second slide 15, and the test channel is located at the center of the support plate 12. For example... Figure 8 As shown, specifically, the auxiliary component 17 includes a third slide rail 171, a third slide table 172, and a fixed plate 173. The third slide rail 171 extends along a first direction, and the side of the third slide rail 171 facing away from the third slide table 172 is fixed to the support platform 300 by a fixed plate 18 to ensure the stability of the auxiliary component 17. Optionally, the third slide table 172 is slidably disposed on the third slide rail 171, and a receiving space is provided through the center of the support platform 300 along the first direction. The third slide table 172 is slidably disposed in the receiving space within the support platform 300 along the first direction. Specifically, a fixed plate 173 is provided on the third slide table 172, and a fixed post is provided at the center of the fixed plate 173. A reticle 11 is installed on the top of the fixed post to achieve a fixed connection between it and the third slide table 172, so that when the third slide table 172 moves along the first direction, the reticle 11 moves synchronously with it.

[0061] For example, when the position of the lens under test is adjusted so that the center of the test channel and the center of the reticle 11 are on the same straight line, that is, the center of the support plate 12 and the center of the fixed plate 173 are on the same straight line, under the drive of the third slide 172, the reticle 11 can sequentially pass through the test channels of the second slide 15 and the first slide 13 and extend out of the first slide 13 to cooperate with each camera in the camera device to realize the focal length test of the lens under test. Optionally, the light source is set on the fixed plate 173 or on the third slide 172, which can be set as needed. Further, the reticle 11 is provided with a cross pattern to facilitate the imaging detection of the lens under test, and the intersection of the cross pattern is on the same straight line as the center of the fixed plate 173, the center of the support plate 12, and the center of the lens under test during detection to ensure the accuracy of the test. Other patterns can also be selected in other embodiments.

[0062] Combination Figures 3-4 As shown, in this embodiment, the camera device includes a first camera group 20 and a second camera group 30 spaced apart along a first direction, both connected to a driving device 40. Driven by the driving device 40, both groups can simultaneously move closer to or further away from the lens under test along the first direction, thus facilitating the testing of lenses with different focal lengths. Specifically, each camera group has multiple cameras, and the adjustment angle range of the cameras in the camera device is 5°-45°. For example, the adjustment angle range of the cameras in the first camera group 20 is 5°-15°, and / or, the adjustment angle range of the cameras in the second camera group 30 is 13.5°-45°.

[0063] like Figures 9-12 As shown, in this embodiment, the first camera group 20 includes a connecting top plate 21, multiple first adjustment brackets 22, multiple mounting plates, and multiple first cameras 25. Optionally, a mounting hole is provided through the center of the connecting top plate 21 along a first direction. After the connecting plate 212 passes through the mounting hole, it is connected to the fixing member 211 above the connecting top plate 21 along the first direction. The other end of the connecting plate 212 is connected to a first camera 25 through the mounting plate, thereby ensuring that a first camera 25 is provided at the center of the first camera group 20 for testing. Further, the multiple first adjustment brackets 22 are evenly distributed on the outside of the first camera 25 at the center position with the center line of the connecting top plate 21 as the axis, and the multiple first adjustment brackets 22 are all connected to the connecting top plate 21 and extend out of the connecting top plate 21. Exemplarily, in this embodiment, the first adjustment bracket 22 is set as an arc-shaped structure, and multiple first cameras 25 are slidably arranged on each first adjustment bracket 22 to facilitate adjustment of the angle and height of the first camera 25.

[0064] like Figure 11 and Figure 12As shown, the first adjustment frame 22 includes a first adjustment part 221 and a first fixing part 222, wherein the first fixing part 222 is connected to the connecting top plate 21, and the first camera 25 is slidably disposed on the first adjustment part 221. Specifically, a first adjustment groove 223 is provided through the first adjustment part 221, and a first limiting step 224 is provided on one side of the first adjustment groove 223, and a first scale line 225 is provided on the other side. In this way, the first limiting step 224 can ensure the stable movement of the mounting plate, and the first scale line 225 can be used to precisely adjust the illumination angle of the first camera 25. For example, the first scale line 225 extends along the length direction of the first adjustment groove 223.

[0065] like Figure 10 As shown, further, in this embodiment, the mounting plate in the first camera group 20 includes a first mounting plate 23 and a second mounting plate 24, wherein the first mounting plate 23 is configured with an L-shaped structure and the second mounting plate 24 is configured with a Z-shaped structure, thereby meeting the installation requirements of different first cameras 25 and improving space utilization. Exemplarily, in this embodiment, four first adjustment frames 22 are provided and evenly distributed, i.e., the angle between two adjacent first adjustment frames 22 is 90°. Further, each first adjustment frame 22 is provided with a first mounting plate 23 and a second mounting plate 24, thereby achieving stable installation of two first cameras 25. That is, in this embodiment, the first camera group 20 is provided with nine first cameras 25, one of which is located at the center.

[0066] like Figure 13 and Figure 14 As shown, in this embodiment, the second camera group 30 includes multiple second adjustment frames 31, third adjustment frames 32, connectors 33, mounting plates, and a second camera 36. Combined with... Figure 5 and Figure 9 As shown, in this embodiment, the driving device 40 includes a support plate 44, and the support plate 44 has a through hole 441 extending along a first direction. The first camera group 20 and the second camera group 30 are respectively installed on the upper and lower sides of the support plate 44 along the first direction. Specifically, the first camera group 20 includes a support column 213, wherein the top of the support column 213 is vertically connected to the connecting top plate 21, and the bottom is vertically connected to the support plate 44. The second camera group 30 is connected to the side of the support plate 44 away from the support column 213, thereby achieving a stable connection between the camera device and the driving device 40. Further, the multiple first cameras 25 in the first camera group 20 located above the support plate 44 along the first direction can be tested through the through hole 441 to avoid interference from the support plate 44 on its imaging optical path. Exemplarily, multiple through channels extend and connect to the outside of the through hole 441. The multiple through channels are distributed in a cross structure on the outside of the through hole 441 to ensure that the cameras in the first camera group 20 can perform actual shooting tests on the lens under test through the through hole 441 and the through channels.

[0067] Specifically, multiple second adjustment frames 31 and multiple third adjustment frames 32 are all connected to the support plate 44 and extend out of the support plate 44. Exemplarily, in this embodiment, both the second adjustment frames 31 and the third adjustment frames 32 are configured as arc-shaped structures, and multiple second cameras 36 are slidably arranged on both the second adjustment frames 31 and the third adjustment frames 32 to facilitate adjustment of the angle and height of the second cameras 36.

[0068] like Figure 16 As shown, the second adjustment frame 31 includes a second adjustment part 311 and a second fixing part 312, wherein the second fixing part 312 is connected to the support plate 44, and the second camera 36 is slidably disposed on the second adjustment part 311. Specifically, a second adjustment groove 313 is provided through the second adjustment part 311, and a second limiting step 314 is provided on one side of the second adjustment groove 313, and a second scale line 315 is provided on the other side. The second limiting step 314 can ensure the stable movement of the mounting plate, and the second scale line 315 can be used to precisely adjust the illumination angle of the second camera 36. Exemplarily, the second scale line 315 extends along the length direction of the second adjustment groove 313.

[0069] like Figure 18 and Figure 19 As shown, similarly, a third adjustment groove 321 is provided through the third adjustment frame 32, and a third limiting step 322 is provided on one side of the third adjustment groove 321, and a third scale line 323 is provided on the other side. The third limiting step 322 ensures stable movement of the mounting plate, and the third scale line 323 allows for precise adjustment of the actual shooting angle of the second camera 36. Exemplarily, the third scale line 323 extends along the length of the third adjustment groove 321. Further, one end of the third adjustment frame 32 is provided with a fixed end 324 for connection with the connector 33, thereby fixing it to the support plate 44 via the connector 33. Figure 14 and Figure 19 As shown, in this embodiment, the connector 33 includes two first fixing feet 331 and two fixing feet 332. The two first fixing feet 331 are used to connect the support plate 44, and the two fixing feet 332 are used to connect the third adjustment frame 32, thereby ensuring the stable installation of the third adjustment frame 32 and increasing the adjustment range of the second camera 36.

[0070] like Figure 14As shown, further, in this embodiment, the mounting plate in the second camera group 30 includes a third mounting plate 34 and a fourth mounting plate 35, wherein the fourth mounting plate 35 is configured with a Z-shaped structure to meet the installation requirements of different second cameras 36 and improve space utilization. Exemplarily, the length of the third adjustment frame 32 is less than the length of the second adjustment frame 31, and the two are installed alternately. Optionally, in this embodiment, four of each of the second adjustment frames 31 and the third adjustment frames 32 are provided, and they are alternately and evenly distributed below the support plate 44. Further, each second adjustment frame 31 is provided with two third mounting plates 34, and each third adjustment frame 32 is provided with one third mounting plate 34 and one fourth mounting plate 35, thereby achieving stable installation of two second cameras 36 on each second adjustment frame 31 and each third adjustment frame 32. That is, in this embodiment, the second camera group 30 is provided with 16 second cameras 36.

[0071] like Figure 4 and Figure 5 As shown, in this embodiment, the driving device 40 includes a drive motor 41, a lower base plate 42, a shelf 43, a support plate 44, an upper top plate 45, and a guide rod 46. Optionally, the drive motor 41 is fixed to the lower base plate 42, and the hydraulic rod 411 of the drive motor 41 extends along a first direction and can move telescopically along the first direction under the drive of the drive motor 41. Specifically, the hydraulic rod 411 passes through the shelf 43 and the support plate 44 in sequence and is connected to the upper top plate 45, so that under the drive of the drive motor 41, the hydraulic rod 411 can drive the shelf 43, the support plate 44, and the upper top plate 45 to move up and down synchronously along the first direction.

[0072] Specifically, multiple guide rods 46 are provided, and they pass through the lower base plate 42, shelf 43, and support plate 44 sequentially from bottom to top along the first direction. The bottom of the guide rod 46 is vertically connected to the support platform 300, and the top of the guide rod 46 is vertically connected to the upper top plate 45. Exemplarily, the guide rod 46 is also configured as a telescopic rod, and the connection portion between the guide rod 46 and the lower base plate 42 is non-telescopic, while the portion of the guide rod 46 above the lower base plate 42 is telescopic. Exemplarily, the shelf 43 and support plate 44 are slidably connected to the guide rod 46 via sleeves, thereby ensuring that the position of the lower base plate 42 does not change. When the hydraulic rod 411 moves telescopically, the shelf 43 and support plate 44 can move smoothly outside the guide rod 46, and the upper top plate 45 can also compress or stretch the top structure of the guide rod 46 to achieve synchronous movement with the shelf 43 and support plate 44. For example, in this embodiment, the driving device 40 also includes a fixed side plate 47, which is connected to the layer plate 43, the support plate 44 and the top plate 45 respectively to ensure the stable connection and relative position of the three, so that they can move up and down in the first direction simultaneously under the drive of the driving motor 41, thereby enabling the camera device mounted on the support plate 44 to move closer to or away from the lens to be tested.

[0073] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A long-focal-length MTF testing machine, characterized in that, include: Rack (100); A support device (10) is installed in the frame (100) and includes a reticle (11). The lens to be tested is placed on the support device (10), and the reticle (11) can move closer to or further away from the lens to be tested along a first direction. The support device (10) can drive the lens to be tested to move along a second direction and a third direction. A camera device and a driving device (40), wherein the camera device includes a camera group of at least two layers arranged along the first direction, the driving device (40) is disposed in the frame (100), the camera device is mounted on the driving device (40), and the driving device (40) is used to drive the camera device to move closer to or away from the lens to be tested along the first direction.

2. The long-focal-length MTF testing machine according to claim 1, characterized in that, The frame (100) is provided with a support platform (300). The support device (10) includes a displacement adjustment component and an auxiliary component (17). The displacement adjustment component and the auxiliary component (17) are both installed on the support platform (300). The displacement adjustment component is used to adjust the movement of the lens under test along the second direction and the third direction. The reticle (11) is installed on the auxiliary component (17). The auxiliary component (17) is used to drive the reticle (11) to move along the first direction.

3. The long-focal-length MTF testing machine according to claim 2, characterized in that, The displacement adjustment assembly includes a first slide (13) and a second slide (15). The lens to be tested is placed on the first slide (13). The first slide (13) can slide along the second direction. The first slide (13) is fixed on the second slide (15), and the second slide (15) is slidably disposed on the support platform (300) along the third direction.

4. The long-focal-length MTF testing machine according to claim 3, characterized in that, The auxiliary component (17) includes a third slide (172), which is slidably disposed on the support platform (300) along the first direction. The reticle (11) is mounted on the third slide (172) and can pass through the second slide (15) and the first slide (13) in sequence for testing the lens under test.

5. The long-focal-length MTF testing machine according to claim 1, characterized in that, The camera device includes a first camera group (20) and a second camera group (30) arranged at intervals along the first direction, and both are connected to the driving device (40). The driving device (40) can drive both to move closer to or further away from the lens under test along the first direction.

6. The long-focal-length MTF testing machine according to claim 5, characterized in that, The first camera group (20) includes a plurality of first adjustment frames (22), and a plurality of first cameras (25) are slidably disposed on each of the first adjustment frames (22).

7. The long-focal-length MTF testing machine according to claim 5, characterized in that, The second camera group (20) includes multiple second adjustment frames (31) and multiple third adjustment frames (32), and multiple second cameras (36) are slidably arranged on both the second adjustment frames (31) and the third adjustment frames (32).

8. The long-focal-length MTF testing machine according to claim 1, characterized in that, The camera device includes multiple cameras, and the adjustment angle range of the cameras is 5°-45°.

9. The long-focal-length MTF testing machine according to claim 1, characterized in that, The driving device (40) includes a driving motor (41) and a support plate (44). The camera group in the camera device is respectively installed on the upper and lower sides of the support plate (44) along the first direction. The driving motor (41) can drive the support plate (44) to move closer to or further away from the lens to be tested along the first direction.

10. The long-focal-length MTF testing machine according to claim 9, characterized in that, The support plate (44) has a through hole (441) extending along the first direction, and the camera group above the support plate (44) along the first direction can test the lens under test through the through hole (441).

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