CN216284228U

CN216284228U - MTF detection device

Info

Publication number: CN216284228U
Application number: CN202122354477.8U
Authority: CN
Inventors: 黎艺文
Original assignee: Guangdong Aolai Technology Co ltd
Current assignee: Guangdong Aolai Technology Co ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-04-12
Anticipated expiration: 2031-09-26

Abstract

The utility model discloses an MTF detection device, which is used for detecting a lens to be detected and comprises a detection platform, a detection component, a test camera set, a reticle and a light source component, wherein the detection platform is provided with a detection position for placing the lens to be detected; the detection assembly is arranged on the detection platform; the test camera group is arranged on one side of the detection assembly, which faces the detection platform, and comprises a plurality of test cameras, and photographing ports of the plurality of test cameras face the detection position and are positioned on the same horizontal plane; the scribing sheet is arranged on the detection platform and is opposite to the position of the lens to be detected; the light source assembly is arranged on the detection platform and corresponds to the position of the dividing piece, and light rays emitted by the light source assembly are radiated to the lens to be detected of the detection position after being divided into the dividing pieces to form a plurality of cursors so that the plurality of testing cameras can carry out MTF testing on the lens to be detected on the detection position. The MTF detection device provided by the utility model can test the MTF value of the lens to be tested without limiting the test camera to focus on the center of a sphere, and has a simple and convenient structure.

Description

MTF detection device

Technical Field

The utility model relates to the technical field of optical detection, in particular to an MTF detection device.

Background

The imaging object distance is provided with a limited lens, the MTF test needs to be obtained according to the lens object distance, and the distance between the camera to be tested and the lens to be tested is adjusted according to the lens imaging object distance so as to obtain a complete MTF curve.

In the prior art, the test camera is usually fixed on a support structure without special adjustment in an infinite distance mode, and on a mounting structure of the camera, all MTF cameras only focus on a concentric origin, so that the field of vision is small, the operation of a focusing lens is complex, the focusing cost is high, the test of finite distance lenses of different models cannot be met, the distance cannot be adjusted according to the object distance of the lens, the application range is small, and the limitation is caused.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an MTF detection device, and aims to solve the problems that an MTF test camera in the prior art only focuses on a concentric origin, the field of view is small, and the cost of a focusing lens is high.

In order to achieve the above object, the present invention provides an MTF detection apparatus for detecting a lens under test, including:

the detection platform is provided with a detection position for placing a lens to be detected;

the detection assembly is arranged on the detection platform, a first test camera set and a plurality of second test camera sets are arranged on one side, facing the detection platform, of the detection assembly, the optical distance between the first test camera set and the lens to be tested is shortest, and the plurality of second test camera sets are annularly arranged on the periphery of the first camera set;

the photographing ports of the first testing camera set and the second testing camera set face the detection position and are positioned on the same horizontal plane;

the dividing sheet is arranged on the detection platform and is opposite to the position of the lens to be detected;

the light source assembly is arranged on the detection platform and corresponds to the position of the dividing sheet, and light rays emitted by the light source assembly are radiated to the lens to be detected of the detection position after passing through the dividing sheet so as to enable the first test camera set and the second test camera sets to shoot and detect the lens to be detected on the detection position.

Optionally, the detection assembly includes a support frame and a mount, the support frame is installed on the detection platform, the mount is installed on the support frame and is arranged right above the detection platform, and the first testing camera set and the second testing camera set are installed on the mount.

Optionally, the mounting element comprises a middle plate, an outer ring plate and a plurality of mounting plates connecting the middle plate and the outer ring plate, and the plurality of mounting plates are arranged in a pairwise opposite manner;

the middle plate is provided with the first testing camera set, the second testing camera set is arranged on the hanging support plates, and the second testing camera set is arranged on at least two opposite hanging support plates.

Optionally, each of the hanging and carrying plates has a sliding groove arranged along a radial direction, and the sliding groove is arranged in parallel to a plane where a photographing opening of the second testing camera set is located.

Optionally, the second testing camera set includes a plurality of mounts, each of the mounts including:

a sliding member mounted on the hanging member and relatively close to or far from the middle plate along the sliding groove,

one end of the connecting plate is rotatably connected with the sliding piece, and the other end of the connecting plate points to the dividing piece;

and the test camera is arranged right below the connecting plate and the photographing port.

Optionally, the connecting plate includes a fixed section, an installation section, and an inclined section connecting the fixed section and the installation section, one end of the fixed section is rotatably connected to the slider, and a side wall of the installation section is fixedly connected to the test camera.

Optionally, the MTF detection device further includes a lifting member, and the lifting member is installed on the support frame and is fixedly connected to the mounting member, so as to drive the mounting member to approach or be away from the detection platform.

Optionally, the bracket comprises 4 upright columns arranged at four corners of the detection platform, one side of each upright column, which is far away from one end of the detection platform, is provided with a guide rail extending along the axial direction of the upright column, each guide rail is provided with a sliding part movably connected to the guide rail, and the sliding part is fixedly connected with the outer ring plate;

a first transverse plate and a second transverse plate are arranged between two opposite upright posts, two ends of each transverse plate are respectively connected with the guide rail of each upright post in a sliding manner, a lifting piece is arranged on each transverse plate, one end of each lifting piece is fixedly connected to the transverse plate, and the other end of each lifting piece is fixedly connected with the outer annular plate so as to drive the detection assembly to perform lifting motion relative to the detection platform along the guide rails;

the lifting piece is a screw rod.

Optionally, the detection platform further includes a driving component, an XY axis module, and a loading lens tray, the driving component is in driving connection with the XY axis, the lens to be detected is mounted on the loading lens tray, and the XY axis module is fixedly connected with the loading lens tray to move along with the XY axis, so that the lens to be detected is placed right above the dicing sheet.

Optionally, the light source assembly further includes a Z-direction scanning focus finder and a light source, the Z-direction scanning focus finder is fixedly connected to the detection platform, and the light source is installed at a position of the Z-direction scanning focus finder relative to the scribe line, so that the light source is close to or far from the scribe line.

The utility model provides an MTF detection device, wherein a first test camera group and a second test camera group are arranged on a detection assembly in a plane mounting mode, photographing ports of the first test camera group and the second test camera group are arranged in parallel, the visual field range is large, a detection camera is arranged on a calibrated object distance plane of a lens to be detected according to a finite-distance lens optical imaging principle, and an MTF imaging adjustment function is detected in a reverse imaging mode, so that the photographing ports of the first test camera group and the second test camera group do not need to be focused on a sphere center, a focusing lens does not need to be used, the MTF value is tested by directly sensing imaging through lens coms chips of the first test camera group and the second test camera group, and a complex structure does not need to be added to the detection assembly so that the focusing ports of the plurality of second test camera groups are focused on the sphere center. The whole detection device is simple in structure, the visual field range is larger, and meanwhile the cost of the focusing lens is low.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an MTF detection apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the mounting assembly of FIG. 1;

FIG. 3 is a schematic structural view of the mounting member of FIG. 2;

fig. 4 is a schematic structural view of the support assembly in fig. 1.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The problems that an MTF test camera in the prior art only focuses on the origin of a sphere center, the visual field is small, and the cost of a focusing lens is high are solved.

The utility model provides an MTF detection device.

In one embodiment, as shown in fig. 1, the MTF detection apparatus includes an inspection stage 20, an inspection assembly 10, a scribe line 40, and a light source assembly 30. The detection platform 20 is provided with a detection position for placing the lens 21 to be detected; the detection assembly 10 is arranged on the detection platform 20, one side of the detection assembly 10, which faces the detection platform 20, is provided with a first test camera set 11 and a plurality of second test camera sets 12, and the optical distance between the first test camera set 11 and the lens 21 to be tested is shortest, namely, the first test camera set 11 is over the lens 21 to be tested just opposite to the lens 21 to be tested. A plurality of second test camera groups 12 are annularly arranged on the periphery of the first test camera group 11; the photographing ports 13 of the first testing camera set 11 and the second testing camera set 12 face the detection position and are located on the same horizontal plane, so that the visual field range of the whole testing assembly is larger, and the whole testing assembly does not need to be focused on the same spherical center point. The dividing and scribing sheet 40 is arranged at the position of the detection platform 20 and is opposite to the lens 21 to be detected; the light source assembly 30 is disposed on the inspection platform 20 and corresponds to the dividing line 40, light emitted from the light source assembly 30 is transmitted through the dividing line 40 and then is radiated to the lens 21 to be inspected at the inspection position, a plurality of cross-shaped light spots are formed on the lens 21 to be inspected, and the first inspection camera set 11 and the second inspection camera set 12 respectively photograph the cross-shaped light spots on the lens 21 to be inspected. That is, the first testing camera set 11 and the second testing camera set 12 are located on the object distance calibration plane of the lens to be tested, because the first testing camera set 11 is located right above the lens 21 to be tested, the obtained image range is large, the detected cross light spots are large, the photographing port 13 of the second testing camera set 12 is parallel to the photographing port 13 of the first testing camera set 11, the obtained image range is consistent with that of the first testing camera set 11, the cross light spots can directly project into the photographing port 13 of the second testing camera set 12 after passing through the lens 21 to be tested, and the focusing process for the second testing camera set 12 is not needed. Therefore, the lens coms chips on the first testing camera group 11 and the second testing camera group 12 are directly used for induction imaging, the light intensity distribution is analyzed, and the MTF value is obtained through Fourier transformation calculation. The device is simple in test, so that a plurality of second test camera sets 12 are focused without adding a complex structure to the detection assembly 10, the structure of the whole detection device is simpler, the visual field range is larger, and the cost of the focusing lens is low. And the matching of the first testing camera set 11 and each second testing camera set 12 can be directly passed through, and the detection of different conditions can be carried out according to the size and the function of the lens 21 to be detected.

It should be noted that the lens 21 to be detected may be an infinite-distance lens or a finite-distance lens, and this embodiment mainly detects the lens 21 to be detected with finite distance, and sets a detection camera on the object distance calibration plane of the lens 21 to be detected according to the optical imaging principle of the finite-distance lens, and reversely images and detects the MTF imaging adjustment function. The MTF is relatively infinite in structure, and concentric focusing of a camera and a focusing lens are not required to be detected.

In one embodiment, the detecting assembly 10 includes a supporting frame 14 and a mounting assembly 15, the supporting frame 14 is mounted on the detecting platform 20, the mounting member 16 is movably mounted on the supporting frame 14 and is disposed right above the detecting platform 20, and the first testing camera set 11 and the second testing camera set 12 are mounted on the mounting assembly 15. The mounting assembly 15, the detection platform 20 and the light source assembly 30 are sequentially arranged from top to bottom, namely, the MTF detection device adopts the inverse projection light path to detect compared with the orthographic projection light path, optical characteristic parameters such as MTF of the lens 21 to be detected can be measured more quickly, and the detection efficiency is greatly improved.

In an embodiment, as shown in fig. 2, the mounting assembly 15 is in an umbrella frame shape, and includes a middle plate 151, an outer ring plate 152, and a plurality of mounting plates 153 connecting the middle plate and the outer ring plate 152, wherein two ends of the mounting plates 153 may be fixedly connected to the middle plate 151 and the outer ring plate 152 by bolts, respectively, or may be fixed to the middle plate 151 and the outer ring plate 152 by clipping, which is not limited herein. The plurality of mounting plates 153 are arranged opposite to each other, that is, the mounting plates 153 may be 2, 4, 6, 8, 12, 14, 16, or the like, which is not limited herein. It can be understood that, depending on the model of the lens 21 to be tested, the number of the second test camera sets 12 required for detecting the lens 21 to be tested is different. Therefore, in order to combine the MTF detection apparatus to detect more lenses of different models and consider the structural strength of the whole mount 16, in this embodiment, as shown in fig. 1 and fig. 3, 12 mount plates 153 arranged in an annular array are used, so that the structural strength is high while the requirement of measuring the lenses 21 to be measured of different models is met, and the lenses are not easily damaged. The first testing camera set 11 is installed at the right center of the middle plate 151, the second camera set is installed on the hanging plate 153, the number of the second testing camera sets 12 can be correspondingly adjusted according to the imaging height of the lens 21 to be tested, for example, when the imaging height of the objective lens to be tested is 1.2, the number of the second testing camera sets 12 is 4, and the second testing camera sets are installed on the hanging plates 153 on the two sides of the central plate in pairwise symmetry.

Further, each of the hanging-carrying boards 153 has a sliding slot 1531 disposed in a radial direction, and the sliding slot 1531 is disposed parallel to the plane where the photographing opening 13 of the second testing camera set 12 is located. That is, the hanging board 153 has a horizontally disposed sliding groove 1531, and the second testing camera set 12 mounted on the hanging board 153 can slide back and forth on the sliding groove to adjust the relative position of each second testing camera set 12 on the hanging board 153, so that the lens 21 to be tested can be more accurately detected. When the model of the lens 21 to be tested is changed, the second testing camera set 12 can be adjusted through the sliding groove 1531 to correspond to the cross-shaped light spot projected by the light source 302 transmitted by the lens 21 to be tested after the light beam is projected onto the scribe line 40 and passes through the lens 21 to be tested.

In one embodiment, the second testing camera set 12 includes a plurality of hangers 16, each hanger 16 includes a slider 161, a connecting plate 162 and a testing camera 163, wherein the connecting plate 162 is mounted on the hanger 16 and relatively close to or far from the middle plate 151 along the sliding slot 1531, one end of the connecting plate 162 is rotatably connected to the slider 161, the other end of the connecting plate 162 points to the scribe 40, and the testing camera 163 is mounted on the connecting plate 162 and the photographing port 13 is facing directly below.

It should be noted that the second testing camera group 12 may include one mount 16, or two, three, or 4 mounts. The imaging heights of the objective lenses to be tested are different, the cross light spots correspondingly formed after the light rays emitted by the light source 302 are projected to the dividing plate 40 are different in number and projected to the first testing camera assembly 11 and the second testing camera assembly 12 through the lens 21 to be tested, and the number of the mounting pieces 16 can be adjusted according to the model of the lens 21 to be tested, which is not limited one by one here. In the present embodiment, the first testing camera group 11 includes a testing camera 163, and the testing camera 163 is fixed at a central position in the middle by a connecting plate 162 and the camera opening is disposed to divide the scribe line 40.

Optionally, in this embodiment, the slider 161 includes a main body 1611, a slider 1612 on one side of the main body 1611, and a knob 1613, the slider 1612 is inserted into the sliding groove 1531 of the hook-and-loop board 153, slides back and forth in the sliding groove 1531, and twists the knob 1613 clockwise to position the hook-and-loop board 153 between the main body 1611 and the knob 1613, so as to fix the slider 161 on the hook-and-loop board 153. When the position of the sliding piece 161 on the mounting plate 153 needs to be adjusted, the knob 1613 only needs to be twisted anticlockwise, and the sliding piece 161 is moved in the sliding groove to a fixed position and then locked, so that the adjustment is simple and convenient. Correspondingly, a connecting hole is formed in the bottom of the main body portion 1611, a mounting hole is clamped in the connecting plate 162 relative to the connecting hole, and a screw penetrates through the mounting hole and the connecting hole in sequence to fix the connecting plate 162 at the bottom of the main body portion 1611. The test camera 163 passes through the bolt fastening on the lateral wall of connecting plate 162, and makes the camera mouth of test camera 163 set up towards whole below to more stable with the installation of test camera 163, in long-time use, the camera lens can not take place the skew yet, and the test effect is better.

It should be noted that the connecting plate 162 may be a straight plate or an inclined plate. In this embodiment, in order to make the distance between two adjacent test cameras 163 closer and to make the detection range thereof wider, the connecting plate 162 is an inclined plate whose middle end is obliquely arranged inward. As shown in fig. 3, the connecting plate 162 includes a fixing section 1621, an inclined section 1622, and a mounting section 1623, which are sequentially connected from top to bottom, and a screw passes through the fixing section 1621 to connect and fix it to the main body 1611, preferably, the width of the side wall of the mounting section 1623 is adapted to the size of the test camera 163, so that the entire side wall of the test camera 163 can be snugly mounted on the side wall of the mounting section 1623, thereby making the entire test camera 163 more firmly mounted. Accordingly, the inclined portion 1622 is inclined in the direction of the center plate of the outer ring plate 152, so that the distance between two adjacent test cameras 163 is closer and the test range is wider.

In an embodiment, the MTF detection apparatus 100 further includes a lifting member 50, wherein the lifting member 50 is mounted on the supporting frame 14 and is fixedly connected to the mounting member 16 to drive the mounting member 16 to approach or depart from the detection platform 20, so as to lengthen or shorten object distances between the first testing camera set 11 and the second testing camera set 12 and the lens 21 to be detected. It should be noted that, the imaging object distances of the lenses 21 to be detected with different types of finite distances are different, and the lifting member 50 can be adapted to the lenses 21 to be detected with different types by controlling the lifting member to lift, so as to achieve the effect of being suitable for the multifunctional lens detection.

Alternatively, in this embodiment, as shown in fig. 1 and 4, the supporting frame 14 includes 4 upright posts 141 disposed at four corners of the detecting platform 20, a peripheral side of one end of each upright post 141 away from the detecting platform 20 has a guide rail 1411 extending along an axial direction of the upright post 141, each guide rail 1411 has a sliding block 1412 capable of moving up and down along the guide rail 1411, one end of the sliding block 1412 away from the guide rail 1411 is fixedly connected with the mount 16 by a bolt, so that the mount 16 can slide up and down on the supporting frame 14 to approach or move away from the detecting platform 20, and further the first testing camera set 11 and the second testing camera set 12 can synchronously move up and down along the mount 16, so as to adjust a distance between the first testing camera set 11 and the second testing camera set 12 and the tested lens according to a focal length of the testing lens, so that a detection range of the entire MTF detecting device is wider, and the lenses 21 to be detected with different finite object distances, the applicability is stronger.

Further, two horizontal plates 1413 are disposed between the two opposite upright posts 141, two ends of the horizontal plate 1413 are slidably connected to the guide rails 1411 of each upright post 141, respectively, and a lifting member is disposed on the horizontal plate 1413, and optionally, the lifting member is a screw rod, and a fixed end of the screw rod is fixedly connected to the outer ring plate 152. Compared with other lifting pieces, the screw rod is used for converting rotary motion into linear motion, so that the friction resistance is small, the sensitivity is high, no vibration exists during starting, no creeping phenomenon exists at low speed, and micro-feeding can be precisely controlled.

One end of the lifting member is fixedly connected to the horizontal plate 1413, and the other end is fixedly connected to the top support rod of the four-bar lifting member 50 through the outer ring plate 152, so that when the screw rod rotates during lifting, the outer ring plate 152 is driven to move up and down along the guide rail 1411 on the upright 141, thereby achieving the purpose of controlling the imaging object distance between the test camera 163 and the lens to be tested. More preferably, through belt transmission between two lead screws to when driving a lead screw motion, two lead screws go up and down in step, further promote the stability of going up and down.

In an embodiment, the detecting platform 20 further includes a driving component and an XY-axis module 60, and the driving component is in driving connection with the XY-axis to drive the lens 21 to be detected mounted on the XY-axis module 60 to move along the X-axis and the Y-axis. Specifically, the detection platform 20 includes a bottom plate, a mounting seat and a lens tray, which are connected in sequence from bottom to top, the bottom plate is fixedly connected with the detection assembly 10 for supporting, a hole for the light source 302 of the light source assembly 30 to penetrate is formed in the center of the bottom plate, and the mounting seat is fixedly connected with the bottom plate through a bolt. The mounting seat is provided with a dividing sheet 40 at a position opposite to the avoidance hole, the loading lens tray is a loading lens tray and is provided with a plurality of mounting holes for the lens 21 to be tested, and each mounting hole can be provided with one lens 21 to be tested. In order to improve the detection efficiency, an XY axis module 60 is additionally arranged on the mounting seat, and the XY axis module 60 is fixedly connected with the lens tray for carrying out MTF detection by moving the lens 21 to be detected on the lens tray to the central position of the reticle 40. After the detection is finished, the XY axis module 60 is controlled to move, so that another lens 21 to be detected on the lens tray is moved to the central position of the dividing sheet 40 to perform the MTF detection, thereby reducing the material changing frequency and improving the test efficiency of the MTF detection device.

In an embodiment, the light source assembly 30 includes a Z-direction scanning focus finder 301 and a light source 302, the Z-direction scanning focus finder 301 is fixedly connected to the bottom surface of the bottom plate by bolts, the light source 302 is installed on the Z-direction scanning focus finder 301 and is disposed right below the dividing plate 40, and the Z-direction scanning focus finder 301 is controlled to drive the light source 302 to perform fine-pitch movement focusing relative to the dividing plate 40, so that data deviation of different MTF detection apparatuses 100 is smaller.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An MTF detecting apparatus for detecting a lens under test, comprising:

the detection assembly is arranged on the detection platform, a first test camera set and a plurality of second test camera sets are arranged on one side, facing the detection platform, of the detection assembly, the optical distance between the first test camera set and the lens to be tested is shortest, and the plurality of second test camera sets are annularly arranged on the periphery of the first test camera set;

2. The MTF detection apparatus of claim 1, wherein the detection component comprises a support frame and a mounting component, the support frame is mounted on the detection platform, the mounting component is mounted on the support frame and disposed directly above the detection platform, and the first testing camera group and the second testing camera group are mounted on the mounting component.

3. The MTF detection apparatus of claim 2, wherein the mounting assembly comprises a middle plate, an outer ring plate, and a plurality of mounting plates connecting the middle plate and the outer ring plate, the plurality of mounting plates being arranged in a circumferential array;

4. The MTF detection apparatus of claim 3, wherein each of the suspension plates has a sliding groove disposed along a radial direction, and the sliding groove is disposed parallel to a plane where a photographing opening of the second testing camera group is located.

5. The MTF detection apparatus of claim 4, wherein the second group of test cameras comprises a plurality of mounts, each of the mounts comprising:

one end of the connecting plate is rotatably connected with the sliding piece, and the other end of the connecting plate points to the detection platform;

the test camera is installed on the connecting plate, and a photographing port of the test camera faces to the lower side.

6. The MTF detection apparatus of claim 5, wherein the connection plate comprises a fixing section, a mounting section, and an inclined section connecting the fixing section and the mounting section, one end of the fixing section is rotatably connected to the slider, and a sidewall of the mounting section is fixedly connected to the test camera.

7. The MTF detection apparatus of claim 5, further comprising a lifting member, wherein the lifting member is mounted on the support frame and is fixedly connected to the mounting member to drive the mounting member to move toward or away from the detection platform.

8. The MTF detection apparatus of claim 7, wherein the bracket comprises 4 pillars disposed at four corners of the detection platform, each of the pillars has a guide rail extending along an axial direction of the pillar at a side thereof away from one end of the detection platform, each of the guide rails has a sliding block movably connected to the guide rail, and one end of the sliding block away from the guide rail is fixedly connected to the outer ring plate;

the lifting piece is a screw rod.

9. The MTF detection apparatus of any of claims 1-8, wherein the detection platform further comprises a driving component, an XY-axis module, and a lens tray, the driving component is drivingly connected to the XY-axis, the lens under test is mounted on the lens tray, and the XY-axis module is fixedly connected to the lens tray to follow the XY-axis for movement so that the lens under test is disposed directly above the reticle.

10. The MTF detection apparatus of claim 1, wherein the light source assembly further comprises a Z-scan focus finder fixedly connected to the detection platform and a light source mounted to the Z-scan focus finder at a position relative to the scribe line such that the light source is closer to or farther from the scribe line.