Auxiliary device for automatic focusing calibration of lens

Abstract

The utility model discloses an auxiliary device for automatic focusing calibration of a lens. The auxiliary device comprises a first graphic card module, a second graphic card module and a transmission mechanism, the first graphic card module and the second graphic card module are respectively fixed at two ends of the transmission mechanism; the first graphic card module and the second graphic card module are both used for pasting graphic cards; the sides, provided with the graphic cards, of the first graphic card module and the second graphic card module are opposite, and the centers of the graphic cards of the first graphic card module and the second graphic card module are located on the same straight line; a bearing mechanism is arranged on the transmission mechanism in a sliding manner and is used for fixing a to-be-tested lens. According to the utility model, not only can the graphic card be effectively fixed and the acquisition quality of the calibration image be ensured, but also the calibration distance of automatic focusing in an infinite mode can be satisfied.

Description

Technical Field

[0001] The utility model relates to the technical field of lens autofocus, in particular to an auxiliary device for lens autofocus calibration. Background Art

[0002] Autofocus calibration in the parameters of the lens ISP (Image Signal Processor) is an important link to ensure the accuracy and stability of the camera autofocus system. Through reasonable calibration methods and parameter settings, the shooting effect of the camera and the user experience can be significantly improved. Among them, the calibration image, as a key reference in the calibration process, directly affects the accuracy of the focus system.

[0003] At present, the conventional acquisition method of the calibration image is to hold the figure card by hand so that the figure card is within the shooting field of view of the lens, and measure the distance between the figure card and the lens with a tape measure. When the calibration distance is reached, take a photo of the figure card with the lens for subsequent calibration analysis. However, holding the figure card by hand is prone to shaking, which affects the focusing accuracy, and this method cannot meet the calibration distances in the upward infinite distance mode and the downward infinite distance mode of autofocus. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an auxiliary device for lens autofocus calibration, which can not only effectively fix the figure card, ensure the acquisition quality of the calibration image, but also meet the calibration distances in the infinite distance mode of autofocus.

[0005] In order to solve the above technical problem, the technical solution adopted by the utility model is as follows:

[0006] An auxiliary device for lens autofocus calibration includes a first figure card module, a second figure card module and a transmission mechanism;

[0007] The first figure card module and the second figure card module are respectively fixed at both ends of the transmission mechanism;

[0008] Both the first figure card module and the second figure card module are used for pasting figure cards;

[0009] The sides of the first figure card module and the second figure card module where the figure cards are arranged face each other, and the centers of the figure cards of the first figure card module and the second figure card module are on the same straight line;

[0010] A bearing mechanism is slidably arranged on the transmission mechanism, and the bearing mechanism is used for fixing the lens to be measured.

[0011] Further, the first figure card module includes a transparent plate and a light strip plate;

[0012] The transparent plate and the light strip board are both fixed to the transmission mechanism;

[0013] The transparent plate is parallel to the light strip board;

[0014] The transparent plate is used for pasting picture cards;

[0015] The second picture card module has the same structure as the first picture card module;

[0016] The transparent plate of the first picture card module and the transparent plate of the second picture card module are arranged opposite to each other.

[0017] Further, the transmission mechanism includes a fixing member, a guide rod, and a pair of synchronous pulleys;

[0018] The first picture card module and the second picture card module are respectively fixed to both ends of the fixing member;

[0019] The guide rod is arranged on the fixing member;

[0020] One of the synchronous pulleys is arranged at one end of the fixing member close to the first picture card module, and the synchronous pulley is connected to a motor;

[0021] The other synchronous pulley is arranged at one end of the fixing member close to the second picture card module;

[0022] The pair of synchronous pulleys are connected by a belt;

[0023] The carrying mechanism is slidably connected to the guide rod, and the carrying mechanism is fixed to the belt.

[0024] Further, the carrying mechanism includes a carrying plate, an L-shaped support member, and a sliding member;

[0025] The sliding member is slidably connected to the guide rod, and the sliding member is fixed to the belt;

[0026] One side of the L-shaped support member is fixed to the sliding member;

[0027] The carrying plate is fixed to the other side of the L-shaped support member, and the carrying plate is parallel to the first picture card module and the second picture card module;

[0028] The carrying plate is used for fixing the lens to be measured.

[0029] Further, the fixing member includes a first fixing piece and a second fixing piece that are parallel to each other;

[0030] The number of the guide rods is two;

[0031] One guide rod is respectively arranged on the first fixing member and the second fixing member;

[0032] The sliding member includes a fixing plate, and sliding blocks are respectively arranged at both ends of the fixing plate;

[0033] The sliding blocks are respectively slidably connected to the guide rods on the first fixing member and the second fixing member;

[0034] The fixing plate is fixed to the belt;

[0035] The carrying mechanism is slidably arranged on the guide rod, and the carrying mechanism is fixed to the belt.

[0036] Further, the carrying mechanism further includes a plug member;

[0037] The plug member is fixed to the sliding member;

[0038] An extension plate is arranged on one side of the fixing member close to the plug member;

[0039] A plurality of plug holes matching the size of the plug member are arranged at intervals on the extension plate.

[0040] Further, the fixing member further includes a cross bar, a first right-angle fixing block and a second right-angle fixing block;

[0041] Both ends of the cross bar are respectively connected to the first fixing member and the second fixing member;

[0042] Two right-angle sides of the first right-angle fixing block are respectively connected to the first fixing member and the cross bar;

[0043] Two right-angle sides of the second right-angle fixing block are respectively connected to the second fixing member and the cross bar.

[0044] Further, the size of the first card module is larger than the size of the second card module.

[0045] Further, a sensor is arranged on the plug member;

[0046] The sensor is used to control the motor.

[0047] Further, the distance between the first card module and the second card module is greater than or equal to 3.10 meters.

[0048] The beneficial effects of the present utility model are as follows: A first graphic card module and a second graphic card module are respectively arranged at both ends of the transmission mechanism, and the graphic cards are respectively pasted on the graphic card modules to ensure the stability of the graphic cards during the focusing shooting process and improve the acquisition quality of the calibration images. At the same time, a bearing mechanism is arranged on the transmission mechanism, and the lens to be measured is fixed through the bearing mechanism, which is convenient for adjusting the relative distance between the lens to be measured and the first graphic card module and the second graphic card module, improving the calibration efficiency. Moreover, since the first graphic card module and the second graphic card module are respectively located on both sides of the lens to be measured, it can meet the calibration distances in the upward infinite distance mode and the downward infinite distance mode of autofocus. Description of the Drawings

[0049] Figure 1 FIG. is a schematic structural diagram of an auxiliary device for lens autofocus calibration provided by an embodiment of the present utility model;

[0050] Figure 2 FIG. is a schematic structural diagram of a transmission mechanism provided by an embodiment of the present utility model;

[0051] Figure 3 FIG. is a schematic structural diagram of a fixing member provided by an embodiment of the present utility model;

[0052] Figure 4 FIG. is a schematic structural diagram of a bearing mechanism provided by an embodiment of the present utility model;

[0053] Reference Numeral Description:

[0054] 1. First graphic card module; 2. Second graphic card module; 11. Transparent plate; 12. Light strip board;

[0055] 3. Transmission mechanism; 31. Fixing member; 311. First fixing piece; 312. Second fixing piece; 313. Third fixing piece; 314. Fourth fixing piece; 315. Cross bar; 316. First right-angle fixing block; 317. Second right-angle fixing block; 32. Guide rod; 33. Synchronous pulley; 34. Motor; 35. Belt; 36. Lifting button; 37. Extension plate; 371. Pin hole;

[0056] 4. Bearing mechanism; 41. Bearing plate; 42. L-shaped support member; 43. Sliding member; 431. Fixing plate; 432. Sliding block; 4311. Protruding piece; 44. Pin member; 441. Sensor. Detailed Embodiment

[0057] To describe in detail the technical content, achieved objectives and effects of the present utility model, the following is described in conjunction with the embodiments and with reference to the drawings.

[0058] An embodiment of the present utility model provides an auxiliary device for automatic focus calibration of a lens, including a first chart module, a second chart module, and a transmission mechanism;

[0059] The first chart module and the second chart module are respectively fixed at two ends of the transmission mechanism;

[0060] Both the first chart module and the second chart module are used for pasting charts;

[0061] The sides of the first chart module and the second chart module where the charts are set face each other, and the centers of the charts of the first chart module and the second chart module are located on the same straight line;

[0062] A carrying mechanism is slidably arranged on the transmission mechanism, and the carrying mechanism is used for fixing the lens to be measured.

[0063] As can be seen from the above description, the beneficial effects of the present utility model are as follows: The first chart module and the second chart module are respectively arranged at two ends of the transmission mechanism, and the charts are respectively pasted on the chart modules to ensure the stability of the charts during the focusing shooting process and improve the acquisition quality of the calibration images. At the same time, a carrying mechanism is arranged on the transmission mechanism, and the lens to be measured is fixed through the carrying mechanism, which is convenient for adjusting the relative distance between the lens to be measured and the first chart module and the second chart module, improving the calibration efficiency. And since the first chart module and the second chart module are respectively located on both sides of the lens to be measured, it can meet the calibration distances in the upward infinite distance mode and the downward infinite distance mode of automatic focus.

[0064] Further, the first chart module includes a transparent plate and a light strip plate;

[0065] Both the transparent plate and the light strip plate are fixed to the transmission mechanism;

[0066] The transparent plate is parallel to the light strip plate;

[0067] The transparent plate is used for pasting charts;

[0068] The second chart module has the same structure as the first chart module;

[0069] The transparent plates of the first chart module and the second chart module are arranged opposite to each other.

[0070] As can be seen from the above description, the chart is pasted on the transparent plate and the light strip plate is provided, so that when the light strip plate is lit, the light can pass through the chart, improving the clarity of the chart and thus improving the quality of the calibration image.

[0071] Further, the transmission mechanism includes a fixing member, a guide rod, and a pair of synchronous wheels;

[0072] The first graphics card module and the second graphics card module are respectively fixed at both ends of the fixing member;

[0073] The guide rod is arranged on the fixing member;

[0074] One of the synchronous pulleys is arranged at one end of the fixing member close to the first graphics card module, and the synchronous pulley is connected with a motor;

[0075] The other synchronous pulley is arranged at one end of the fixing member close to the second graphics card module;

[0076] The pair of synchronous pulleys are connected by a belt;

[0077] The carrying mechanism is slidably connected with the guide rod, and the carrying mechanism is fixed on the belt.

[0078] As can be seen from the above description, the movement direction of the carrying mechanism is limited by the guide rod. At the same time, synchronous pulleys are respectively arranged at both ends of the fixing member. One of the synchronous pulleys is provided with a motor, and the synchronous pulleys are connected by a belt. Moreover, the carrying mechanism is fixed on the belt, so that when the motor drives one of the synchronous pulleys to rotate, the belt can drive the carrying mechanism to transmit, which is convenient for adjusting the relative distance between the lens to be measured and the first graphics card module and the second graphics card module, and improving the calibration efficiency.

[0079] Further, the carrying mechanism includes a carrying plate, an L-shaped support member and a sliding member;

[0080] The sliding member is slidably connected with the guide rod, and the sliding member is fixed on the belt;

[0081] One side of the L-shaped support member is fixed on the sliding member;

[0082] The carrying plate is fixed on the other side of the L-shaped support member, and the carrying plate is parallel to the first graphics card module and the second graphics card module;

[0083] The carrying plate is used for fixing the lens to be measured.

[0084] As can be seen from the above description, the sliding member is slidably connected with the guide rod to limit the movement direction of the carrying plate. At the same time, the sliding member is fixed on the belt, which is convenient for adjusting the position of the lens to be measured on the carrying plate. In addition, the carrying plate is fixed on the sliding member through the L-shaped support member to ensure that the carrying plate can be parallel to the graphics card module.

[0085] Further, the fixing member includes a first fixing piece and a second fixing piece that are parallel to each other;

[0086] The number of the guide rods is two;

[0087] One guide rod is respectively arranged on the first fixing member and the second fixing member;

[0088] The sliding member includes a fixing plate, and sliding blocks are respectively arranged at both ends of the fixing plate;

[0089] The sliding blocks are respectively slidably connected to the guide rods on the first fixing member and the second fixing member;

[0090] The fixing plate is fixed to the belt.

[0091] As can be seen from the above description, the fixing member is provided with a first fixing member and a second fixing member, and guide rods are arranged on both fixing members to ensure the stability of the transmission process. The fixing plate is fixed to the belt, and the sliding blocks are slidably connected to the guide rods. While realizing the transmission through the belt, it avoids large jitters of the lens during transmission.

[0092] Furthermore, the bearing mechanism further includes a pin member;

[0093] The pin member is fixed to the sliding member;

[0094] An extension plate is arranged on one side of the fixing member close to the pin member;

[0095] A plurality of pin holes matching the size of the pin member are arranged at intervals on the extension plate.

[0096] As can be seen from the above description, when the bearing mechanism is in a static state, through the cooperation of the pin member and the pin holes, the sliding member can be fixed to the fixing member, preventing the belt from being in a stretched state for a long time, so as to extend the service life of the belt.

[0097] Furthermore, the fixing member further includes a cross bar, a first right-angle fixing block and a second right-angle fixing block;

[0098] Both ends of the cross bar are respectively connected to the first fixing member and the second fixing member;

[0099] Two right-angle sides of the first right-angle fixing block are respectively connected to the first fixing member and the cross bar;

[0100] Two right-angle sides of the second right-angle fixing block are respectively connected to the second fixing member and the cross bar.

[0101] As can be seen from the above description, the first fixing member and the second fixing member are fixed by the cross bar, and at the same time, the cross bar, the first fixing member and the second fixing member are fixed by the right-angle fixing blocks, so as to ensure that the two card modules located on the fixing member can be kept on the same straight line.

[0102] Furthermore, the size of the first card module is larger than the size of the second card module.

[0103] As described above, the size of the first card module is relatively large to ensure the stability of the device in the vertical state.

[0104] Furthermore, a sensor is provided on the plug member;

[0105] The sensor is used to control the motor.

[0106] As described above, when the plug member is in the inserted state, the sensor synchronously controls the motor to be in the locked state, thereby preventing the motor from starting accidentally in the inserted state and damaging the device.

[0107] Furthermore, the distance between the first card module and the second card module is greater than or equal to 3.10 meters.

[0108] As described above, the distance between the first card module and the second card module is set to be large enough to meet the calibration distance in the infinite far mode for autofocus.

[0109] The embodiment of the present utility model provides an auxiliary device for lens autofocus calibration, which can be applied to the autofocus calibration scenario in the lens ISP parameters. It can not only effectively fix the card to ensure the acquisition quality of the calibration image, but also meet the calibration distance in the infinite far mode for autofocus. The following is illustrated by specific embodiments:

[0110] Please refer to Figures 1 to 4 , Embodiment 1 of the present utility model is:

[0111] As Figure 1 shown, an auxiliary device for lens autofocus calibration includes a first card module 1, a second card module 2, and a transmission mechanism 3. The first card module 1 and the second card module 2 are respectively fixed at both ends of the transmission mechanism 3; both the first card module 1 and the second card module 2 are used for pasting cards; the sides of the first card module 1 and the second card module 2 where the cards are provided face each other, and the centers of the cards of the first card module 1 and the second card module 2 are on the same straight line; a carrying mechanism 4 is slidably arranged on the transmission mechanism 3, and the carrying mechanism 4 is used for fixing the lens to be measured. Among them, the distance between the first card module 1 and the second card module 2 is greater than or equal to 3.10 meters. The size of the first card module 1 is larger than the size of the second card module 2.

[0112] The following is a specific structure of the first card module 1, the second card module 2, the transmission mechanism 3, and the carrying mechanism 4.

[0113] As Figure 2As shown, the first card module 1 includes a transparent plate 11 and a light strip plate 12. The transparent plate 11 and the light strip plate 12 are both fixed to the transmission mechanism 3; the transparent plate 11 and the light strip plate 12 are parallel to each other; the transparent plate 11 is used for pasting cards; the second card module 2 has the same structure as the first card module 1; the transparent plate 11 of the first card module 1 and the transparent plate 11 of the second card module 2 are arranged opposite to each other. Among them, there is a spacing distance between the transparent plate 11 and the light strip plate 12 to avoid overexposure of the cards. The transparent plate 11 and the light strip plate 12 in each card module are respectively vertically connected to the fixing member 31 of the transmission mechanism 3, so that the transparent plate 11 of the first card module 1 and the transparent plate 11 of the second card module 2 are arranged opposite to each other.

[0114] As Figure 2 shown, the transmission mechanism 3 includes a fixing member 31, a guide rod 32, and a pair of synchronous pulleys 33. The first card module 1 and the second card module 2 are respectively fixed to both ends of the fixing member 31; the guide rod 32 is arranged on the fixing member 31; one synchronous pulley 33 is arranged at one end of the fixing member 31 close to the first card module 1, and the synchronous pulley 33 is connected to a motor 34; the other synchronous pulley 33 is arranged at one end of the fixing member 31 close to the second card module 2; the pair of synchronous pulleys 33 are connected by a belt 35; the carrying mechanism 4 is slidably connected to the guide rod 32, and the carrying mechanism 4 is fixed to the belt 35.

[0115] As Figure 3 shown, the fixing member 31 includes a first fixing piece 311 and a second fixing piece 312 that are parallel to each other; the number of guide rods 32 is two; one guide rod 32 is respectively arranged on the first fixing piece 311 and the second fixing piece 312. In some embodiments, the fixing member 31 further includes a third fixing piece 313 and a fourth fixing piece 314. The two ends of the third fixing piece 313 and the fourth fixing piece 314 are respectively connected to the first fixing piece 311 and the second fixing piece 312, and the third fixing piece 313 is located between one end of the guide rod 32 and the first card module 1, and the fourth fixing piece 314 is located between the other end of the guide rod 32 and the second card module 2. Among them, one synchronous pulley 33 is arranged in the middle of the third fixing piece 313, and the other synchronous pulley 33 is arranged in the middle of the fourth fixing piece 314, so that the pair of synchronous pulleys 33 are located on the same straight line, and the synchronous pulleys 33 are connected by a belt 35, so that the belt 35 and the guide rod 32 are parallel to each other, thereby ensuring that the moving direction of the belt 35 is the same as the sliding direction of the guide rod 32.

[0116] As Figure 3As shown, the fixing member 31 further includes a cross bar 315, a first right-angle fixing block 316, and a second right-angle fixing block 317. The two ends of the cross bar 315 are respectively connected to the first fixing member 311 and the second fixing member 312; the two right-angle sides of the first right-angle fixing block 316 are respectively connected to the first fixing member 311 and the cross bar 315; the two right-angle sides of the second right-angle fixing block 316 are respectively connected to the second fixing member 312 and the cross bar 315.

[0117] In some embodiments, a lifting button 36 is further provided on one side of the fixing member 31. The lifting button 36 is electrically connected to the motor 34 to control the movement of the carrying mechanism 4 on the transmission mechanism 3.

[0118] As Figure 4 shown, the carrying mechanism 4 includes a carrying plate 41, an L-shaped support member 42, and a sliding member 43. The sliding member 43 is slidably connected to the guide rod 32, and the sliding member 43 is fixed to the belt 35; one side of the L-shaped support member 42 is fixed to the sliding member 43; the carrying plate 41 is fixed to the other side of the L-shaped support member 42, and the carrying plate 41 is parallel to the first graphics card module 1 and the second graphics card module 2; the carrying plate 41 is used for fixing the lens to be tested. The sliding member 43 includes a fixing plate 431, and sliding blocks 432 are respectively provided at the two ends of the fixing plate 431; the sliding blocks 432 are respectively slidably connected to the guide rods 32 on the first fixing member 311 and the second fixing member 312; the fixing plate 431 is fixed to the belt 35.

[0119] In some embodiments, a hollow is provided in the middle of the carrying plate 41, and the fixing plate 431 is arranged in a U-shaped structure to reduce the load of the carrying mechanism 4 and reduce the load on the belt 35 and the motor 34.

[0120] In some embodiments, a protruding member 4311 is provided on the fixing plate 431, and the belt 35 is fixed to the protruding member 4311, so that the fixing plate 431 can be fixed to adapt to the distance of the belt 35 and avoid stretching and deforming the belt 35.

[0121] As Figure 4 shown, the carrying mechanism 4 further includes a pin member 44. The pin member 44 is fixed to the sliding member 43; an extension plate 37 is provided on one side of the fixing member 31 close to the pin member 44; a plurality of pin holes 371 matching the size of the pin member 44 are arranged at intervals on the extension plate 37. A sensor 441 is provided on the pin member 44; the sensor 441 is used to control the motor 34.

[0122] According to the calibration and debugging requirements of lens AF automatic focusing, during the calibration process, it is necessary to use the full-scan command to take pictures of the chart cards in four states for the lens to be tested in an environment with a brightness greater than 700 lux. Among them, the auxiliary device provided by the present invention needs to be used in the downward shooting state (object distance is infinite) and the upward shooting state (object distance is 10 cm upward).

[0123] The operation steps of an auxiliary device for lens automatic focusing calibration of the present invention are specifically as follows:

[0124] Fix the lens to be tested at the designated position on the carrier plate, start the lens to be tested, and after determining that the position of the lens to be tested and the chart card for shooting is accurate, start shooting.

[0125] Start the auxiliary device, remove the pin member from the pin hole, and turn on the light strip boards of the first chart card module and the second chart card module to make the chart card on the transparent plate in a bright state. The operator presses the lifting button, the motor starts, drives the synchronous wheel to rotate, thereby driving the belt to move, so that the carrier mechanism fixed on the belt rises. When the carrier mechanism rises to the designated position, that is, the lens to be tested is at a position 3 m away from the first chart card module (downward shooting state) and 10 cm away from the second chart card module (upward shooting state), control the lens to be tested to automatically focus and take pictures of the chart card at this position, take out the taken chart card pictures and upload them to the ISP debugging software to analyze the focusing parameters to achieve calibration.

[0126] After the shooting is completed, the operator presses the lifting button, the motor starts, drives the synchronous wheel to rotate, thereby driving the belt to move, so that the carrier mechanism fixed on the belt descends, remove the lens to be tested, and insert the pin member into the original pin hole, and turn off the power supply of the auxiliary device.

[0127] In summary, for an auxiliary device for lens automatic focusing calibration provided by the present invention, a first chart card module and a second chart card module are respectively arranged at both ends of the transmission mechanism, and chart cards are respectively pasted on the first chart card module and the second chart card module to ensure the stability of the chart card during the focusing shooting process; at the same time, a light strip board is arranged in each chart card module to ensure that the chart card is in a bright state and improve the acquisition instruction of the chart card image. In addition, through the rotation of the synchronous wheel and the belt on the transmission mechanism, the carrier mechanism located on the transmission mechanism is driven to rise or fall, which is convenient for adjusting the relative distance between the lens to be tested and the first chart card module and the second chart card module, improving the calibration efficiency, and the distance between the first chart card module and the second chart card module can meet the calibration distances in the upward distance infinite mode and the downward distance infinite mode of automatic focusing.

[0128] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in the relevant technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. An auxiliary device for automatic focus calibration of a lens, characterized in that: It includes a first image card module, a second image card module and a transmission mechanism; The first image card module and the second image card module are respectively fixed to two ends of the transmission mechanism; The first picture card module and the second picture card module are both used for pasting picture cards; The first image card module and the second image card module are provided with sides of image cards facing each other, and the centers of the image cards of the first image card module and the second image card module are located on the same straight line; A bearing mechanism is slidably arranged on the transmission mechanism, and the bearing mechanism is used for fixing the lens to be tested.

2. The auxiliary device for automatic focus calibration of a lens according to claim 1, characterized in that: The first image card module includes a transparent plate and a light strip plate; The transparent plate and the light strip plate are both fixed to the transmission mechanism; The transparent plate and the light strip plate are parallel to each other; The transparent plate is used for pasting picture cards; The second image card module has the same structure as the first image card module; The transparent plate of the first image card module is arranged opposite to the transparent plate of the second image card module.

3. The auxiliary device for automatic focus calibration of a lens according to claim 1, characterized in that: The transmission mechanism includes a fixed member, a guide rod and a pair of synchronous wheels; The first image card module and the second image card module are respectively fixed to two ends of the fixing member; The guide rod is arranged on the fixing member; A synchronous wheel is arranged at one end of the fixed component close to the first image card module, and the synchronous wheel is connected to a motor; Another synchronous wheel is arranged at one end of the fixing member close to the second image card module; The pair of synchronous wheels are connected by a belt; The bearing mechanism is slidably connected to the guide rod, and the bearing mechanism is fixed on the belt.

4. The auxiliary device for automatic focus calibration of a lens according to claim 3, characterized in that: The bearing mechanism comprises a bearing plate, an L-shaped supporting member and a sliding member; The sliding member is slidably connected to the guide rod, and the sliding member is fixed on the belt; One side of the L-shaped supporting member is fixed on the sliding member; The carrying plate is fixed to the other side of the L-shaped supporting member, and the carrying plate is parallel to the first image card module and the second image card module; The bearing plate is used to fix the lens to be tested.

5. The auxiliary device for automatic focus calibration of a lens according to claim 4, characterized in that: The fixing member comprises a first fixing member and a second fixing member which are parallel to each other; The number of the guide rods is two; The first fixing member and the second fixing member are respectively provided with a guide rod; The sliding member comprises a fixed plate, and sliding blocks are respectively arranged at both ends of the fixed plate; The sliding block is slidably connected to the guide rods on the first fixing member and the second fixing member respectively; The fixing plate is fixed on the belt.

6. The auxiliary device for automatic focus calibration of a lens according to claim 4, characterized in that: The bearing mechanism further comprises a latch member; The latch member is fixed to the sliding member; An extension plate is provided on one side of the fixing member close to the latch member; The extension plate is provided with a plurality of latch holes at intervals and the sizes of the latch holes match those of the latch members.

7. The auxiliary device for automatic focus calibration of a lens according to claim 5, characterized in that: The fixing member also includes a crossbar, a first right-angle fixing block and a second right-angle fixing block; Two ends of the crossbar are respectively connected to the first fixing member and the second fixing member; Two right-angle sides of the first right-angle fixing block are respectively connected to the first fixing member and the crossbar; The two right-angle sides of the second right-angle fixing block are respectively connected to the second fixing member and the cross bar.

8. The auxiliary device for automatic focus calibration of a lens according to claim 1, characterized in that: The size of the first image card module is larger than the size of the second image card module.

9. The auxiliary device for automatic focus calibration of a lens according to claim 6, characterized in that: A sensor is provided on the latch member; The sensor is used to control the motor.

10. The auxiliary device for automatic focus calibration of a lens according to claim 1, characterized in that: The distance between the first image card module and the second image card module is greater than or equal to 3.10 meters.

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