An automatic focusing system for detection camera

Abstract

The present invention provides an automatic focusing system for an inspection camera, comprising: a fine-tuning lifting and rotating mechanism; a camera bracket, the top of which is connected to the fine-tuning lifting and rotating mechanism and the bottom of which is connected to the inspection camera; a focusing shaft seat connected to the bottom of the lifting bracket, a bearing disposed therein, an adjustment shaft disposed therein, a space for accommodating the camera disposed therein, and an inner surface of the adjustment shaft not in contact with the camera; a circular arc gear synchronization wheel, the top of which is connected to the bottom of the focusing shaft and the circular arc gear synchronization wheel is connected to a drive mechanism via a conveyor belt; a focusing ring connected to the circular arc gear synchronization wheel via a floating transmission mechanism; and a focusing retaining ring disposed on the inner side of the focusing ring and snapped into a gap between the focusing ring and the focal ring of the lens so as to lock the focal ring. The present invention automatically adjusts the focal length and object distance of the inspection camera to the most suitable matching focal length and object distance, greatly improving the efficiency and accuracy of optical inspection.

Description

Technical Field

[0001] The present invention relates to the technical field of visual inspection equipment, and in particular to an automatic focusing system for an inspection camera. Background Art

[0002] In the existing manufacturing process of LCD panels, optical inspection is required through inspection cameras. During the inspection process, the focal length of the inspection camera often needs to be adjusted to more clearly inspect the LCD panel. In the existing technology, focusing is usually completed by the operator manually adjusting the camera lens. The operator often roughly adjusts a value based on experience, and then slowly fine-tunes to achieve the required focal length. However, this adjustment method not only greatly reduces the efficiency of inspection, but also fails to achieve the most appropriate focal length, resulting in failure of optical inspection of the LCD panel, affecting the subsequent use of the LCD panel. Summary of the Invention

[0003] To address the above-mentioned defects, the present invention provides an automatic focusing system for an inspection camera. The present invention is used to automatically adjust the focal length and object distance of the inspection camera, and can adjust to the most suitable matching focal length and object distance, greatly improving the efficiency and accuracy of optical inspection.

[0004] An automatic focusing system for a detection camera, comprising: a lifting support; a fine-tuning lifting and rotating mechanism, which is arranged on the lifting support; a camera bracket, the top of the camera bracket is connected to the fine-tuning lifting and rotating mechanism, the bottom of the camera bracket is connected to the detection camera, and the detection camera is connected to the lens; a focusing shaft seat, which is connected to the bottom of the lifting support, a bearing is provided in the focusing shaft seat, an adjustment shaft is provided in the bearing, a space for accommodating the lens is provided in the adjustment shaft, and the inner surface of the adjustment shaft does not contact the lens; an arc-toothed synchronous wheel, the top of which is connected to the bottom of the focusing shaft, the arc-toothed synchronous wheel is connected to a driving mechanism through a conveyor belt; a focusing ring, which is connected to the arc-toothed synchronous wheel through a floating transmission mechanism; a focusing clamping ring, which is arranged on the inner side of the focusing ring, and the focusing clamping ring is clamped into the gap between the focusing ring and the focal ring of the lens so that the focusing clamping ring is suitable for locking the focal ring.

[0005] In one embodiment of the present invention, the fine-tuning lifting and rotating mechanism includes a manual rotating slide and an electric lifting slide. The electric lifting slide is arranged on the lifting support. The ball screw of the electric lifting slide is connected to the output shaft of the servo motor. The manual rotating slide is arranged on the electric lifting slide. The manual rotating slide is connected to the top of the camera bracket.

[0006] In one embodiment of the present invention, a lifting position sensor is provided on one side of the electric lifting slide.

[0007] In one embodiment of the present invention, a shaft end cover is provided on the upper side of the focusing shaft, a sensing piece is installed on the shaft end cover, and a focusing angle sensor is provided on the focusing shaft seat.

[0008] In one embodiment of the present invention, the floating transmission mechanism includes a transmission ring, a plurality of protrusions are evenly arranged on the top of the transmission ring, a first groove is formed between two adjacent protrusions, a second groove opening toward the focusing ring is provided in the middle of the protrusion, a first fixing portion is evenly arranged on the top outer surface of the protrusion, and a second fixing portion is evenly arranged on the bottom outer surface of the transmission ring.

[0009] In one embodiment of the present invention, at least two limiting components are provided on the transmission ring, and the limiting components include a positive limiting part, a positive buffer part, a reverse limiting part and a reverse buffer part which are arranged in sequence along the circumferential direction of the transmission ring; the positive limiting part includes a positioning pin, two equal height pins, and a limiting half ring, the top of the positioning pin is installed on the circular arc gear synchronous wheel, the lower end of the positioning pin is arranged in the first groove, the bottoms of the two equal height pins are connected to the focusing ring, the tops of the two equal height pins are respectively arranged in the two adjacent second grooves, the two ends of the limiting half ring are respectively connected to the tops of the equal height pins, the limiting half ring is arranged on the upper side of the second fixing part, and the middle part of the limiting half ring is provided with a protrusion matching the size of the positioning pin to position the positioning pin; the positive buffer part includes a first compression spring and a second compression spring, the first compression spring and the second compression spring are respectively arranged in the adjacent first groove and second groove, the first compression spring is arranged close to the positive limiting part, the top of the sleeve of the first compression spring is connected to the circular arc gear synchronous wheel, and the bottom of the spring part of the first compression spring is connected to the bottom of the first groove; the second compression spring The bottom of the sleeve of the spring is connected to the focusing ring, and the top of the spring part of the second compression spring is connected to the top of the second groove; the anti-limiting part includes a locating pin, two equal height pins, and a limiting half ring. The bottom of the locating pin is installed on the focusing ring, the upper end of the locating pin is arranged in the second groove, the tops of the two equal height pins are connected to the arc gear synchronous wheel, and the bottoms of the two equal height pins are distributed in the two adjacent first grooves. The two ends of the limiting half ring are respectively connected to the bottom ends of the equal height pins. The limiting half ring is arranged on the lower side of the second fixing part, and the middle of the limiting half ring The anti-buffer portion is provided with a protrusion matching the size of the locating pin to position the locating pin; the anti-buffer portion includes a second compression spring and a first compression spring, the first compression spring and the second compression spring are respectively arranged in adjacent first grooves and second grooves, the second compression spring is arranged close to the anti-limiting portion, the bottom of the sleeve of the second compression spring is connected to the focusing ring, and the top of the spring part of the second compression spring is connected to the top of the second groove; the top of the sleeve of the first compression spring is connected to the circular arc gear synchronous wheel, and the bottom of the spring part of the first compression spring is connected to the bottom of the first groove.

[0010] In one embodiment of the present invention, the inner surface of the focus ring is conical.

[0011] In one embodiment of the present invention, a plurality of wedge plates are evenly distributed on the upper side of the focus clamping ring, and the inclination angle of the wedge plates matches the inclination angle of the focus ring.

[0012] In one embodiment of the present invention, a rubber pad is attached to the inner side of the wedge plate.

[0013] In one embodiment of the present invention, the lifting support is provided on the coarse adjustment lifting mechanism.

[0014] In summary, the present invention provides an automatic focusing system for a detection camera, and the beneficial effects of the present invention are:

[0015] The present invention is applicable to different lenses and improves non-autofocus cameras into autofocus cameras. The present invention obtains the most matching object distance by combining coarse adjustment and fine adjustment. The coarse adjustment position of the test distance is located using the depth of field table of the lens. The coarse adjustment lifting mechanism drives the lifting support to lift and lower. The lifting support then drives the camera and lens to lift and lower, thereby achieving coarse adjustment of the lens object distance. The fine adjustment of the lens object distance is achieved by a fine adjustment lifting and rotating mechanism. The present invention controls the movement of the circular arc gear synchronous wheel through a stepping motor. The circular arc gear synchronous wheel drives the movement of the focusing ring through a floating transmission mechanism. The focusing ring drives the movement of the focal ring of the lens, thereby achieving the purpose of automatically adjusting the focal length of the detection camera. In addition, during the adjustment process, the control mechanism of the detection camera continuously provides feedback, so that the most appropriate matching of the focal length can be achieved, greatly improving the efficiency and accuracy of optical detection.

[0016] Furthermore, the connection between the focus ring and the lens is changed from a rigid connection to a flexible connection, reducing the chance of damage to the camera lens.

[0017] Furthermore, the present invention avoids focusing errors caused by the non-concentricity between the lens and the focusing structure through the floating transmission mechanism, thereby improving positioning accuracy.

[0018] Furthermore, the present invention is provided with a focus angle sensor, and when the detection camera is rotated to the maximum angle, the automatic focus system is immediately stopped to prevent damage to the detection camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the three-dimensional structure of an automatic focusing system for an inspection camera provided by an embodiment of the present invention.

[0020] Figure 2 This is a front view of an automatic focusing system for an inspection camera provided by one embodiment of the present invention.

[0021] Figure 3 for Figure 2 Middle AA section view.

[0022] Figure 4 This is the main view of the floating transmission mechanism.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the transmission ring.

[0024] Figure 6 This is a bottom view of the focus ring.

[0025] Figure 7 for Figure 6 Middle BB cross-section view.

[0026] Figure 8 Schematic diagram of the three-dimensional structure of the focusing clamp.

[0027] Among them, 11, screw; 12, hand wheel; 21, lifting support; 22, electric lifting slide; 221, servo motor; 23, manual rotary slide; 24, camera bracket; 31, lifting position sensor; 32, focus angle sensor; 41, detection camera; 42, lens; 43, adapter ring; 51, focus shaft seat; 52, bearing; 53, focus shaft; 541, first arc gear synchronous wheel; 542, second arc gear synchronous wheel; 543, conveyor belt; 544, stepper motor; 55, transmission Moving ring; 551, first groove; 552, second groove; 553, first fixing part; 554, second fixing part; 561, first positioning pin; 562, first limiting semi-ring; 563, first contour pin; 564, first compression spring; 565, second compression spring; 566, second positioning pin; 567, second limiting semi-ring; 568, second contour pin; 57, focusing ring; 571, tapered hole; 58, focusing retaining ring; 581, wedge plate; 59, shaft end cover; 6, camera cover. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Please refer to Figure 1 、 2, an automatic focusing system for a detection camera, comprising: a coarse adjustment lifting mechanism, a lifting support 21, a fine adjustment lifting and rotating mechanism, a camera bracket 24 and a focusing rotating mechanism.

[0030] The coarse adjustment lifting mechanism adopts a common lifting structure. In this embodiment, the coarse adjustment lifting mechanism adopts a screw 11, which is connected to a drive mechanism. In this embodiment, the drive mechanism adopts a handwheel 12. The drive mechanism can also adopt a drive device such as a motor.

[0031] In other embodiments, the coarse adjustment lifting mechanism adopts a linear guide rail, the lifting support 21 is connected to the slider of the linear guide rail, and one end of the linear guide rail is connected to the end of the motor.

[0032] The lifting support 21 is arranged on the coarse adjustment lifting mechanism. The upper part of the lifting support 21 is connected to the fine adjustment lifting and rotating mechanism, and the bottom of the lifting support 21 is connected to the focusing rotating mechanism.

[0033] The fine-tuning lifting and rotating mechanism includes a manual rotary slide 23 and an electric lift slide 22. The electric lift slide 22 is mounted on the lifting support 21, and its ball screw is connected to the output shaft of the servo motor 221. The manual rotary slide 23 is mounted on the electric lift slide 22 and is connected to the top of the camera bracket 24.

[0034] Furthermore, a lifting position sensor 31 is provided on one side of the electric lifting slide 22, which is used to transmit the height signal of the electric lifting slide to the controller in a timely manner, and when the electric lifting slide 22 descends to the lowest position, the electric lifting slide is stopped from descending immediately to avoid damage to the camera and lens.

[0035] The top of the camera bracket 24 is connected to the manual rotating slide, and the bottom of the camera bracket 24 is connected to the inspection camera 41, which is connected to the lens 42. The electric lifting slide 22 drives the manual rotating slide to rise and fall, and the manual rotating slide drives the camera bracket 24 to rotate. The camera bracket 24 then drives the inspection camera 41 to move, thereby achieving the lifting and rotation of the inspection camera 41.

[0036] Next, the focus rotation mechanism includes a focus shaft seat 51 , an arc gear synchronization wheel, a floating transmission mechanism, a focus ring 57 and a focus clamping ring 58 .

[0037] like Figure 2 As shown, a camera shield 6 is provided on the upper side of the focusing shaft seat 51 to protect the detection camera.

[0038] like Figure 3As shown, the focusing shaft seat 51 is connected to the bottom of the lifting support 21, and a bearing 52 is provided in the focusing shaft seat 51. An adjusting shaft is provided in the bearing 52, and a space for accommodating the lens 42 is provided in the adjusting shaft, and the inner surface of the adjusting shaft does not contact the lens 42.

[0039] Furthermore, a shaft end cover 59 is provided on the upper side of the focusing shaft 53, and a sensing piece is installed on the shaft end cover 59. A focusing angle sensor 32 is provided on the focusing shaft seat 51 to transmit the focusing angle signal to the controller in time. When the lens 42 rotates to the maximum angle, the automatic focusing system is stopped immediately to prevent damage to the lens 42.

[0040] Furthermore, the bottom of the focusing shaft 53 is connected to the top of the circular arc gear synchronization wheel, and the circular arc gear synchronization wheel is connected to the driving mechanism through a transmission belt 543.

[0041] In this embodiment, the bottom of the focusing shaft 53 is connected to the top of the first circular arc tooth synchronization wheel 541, the first circular arc tooth synchronization wheel 541 is connected to the second circular arc tooth synchronization wheel 542 through the conveyor belt 543, and the inner hole of the second circular arc tooth synchronization wheel 542 is connected to the output shaft of the stepping motor 544.

[0042] The focusing ring 57 is connected to the arc gear synchronization wheel through a floating transmission mechanism. Figure 5 As shown, the floating transmission mechanism includes a transmission ring 55, and a plurality of protrusions are evenly arranged on the top of the transmission ring 55, a first groove 551 is formed between two adjacent protrusions, a second groove 552 is provided in the middle of the protrusion, and the opening is directed toward the focusing ring 57. A first fixing portion 553 is evenly arranged on the top outer surface of the protrusion, and a second fixing portion 554 is evenly arranged on the bottom outer surface of the transmission ring 55.

[0043] At least two limiting components are provided on the transmission ring 55. In this embodiment, Figure 4 As shown, the transmission ring 55 is provided with two limiting components. The limiting components include a positive limiting portion, a positive buffer portion, a negative limiting portion, and a negative buffer portion, which are sequentially arranged along the circumference of the transmission ring 55. The floating transmission mechanism avoids focusing errors caused by misalignment between the lens and the focusing structure.

[0044] The positive limiting part includes a first positioning pin 561, two first contour pins 563, and a first limiting semi-ring 562. The top of the first positioning pin 561 is installed on the first arc gear synchronous wheel 541, and the lower end of the first positioning pin 561 is arranged in the first groove 551. The bottoms of the two first contour pins 563 are connected to the focusing ring 57. The tops of the two first contour pins 563 are respectively arranged in two adjacent second grooves 552. The two ends of the first limiting semi-ring 562 are respectively connected to the top of the first contour pins 563. The first limiting semi-ring 562 is arranged on the upper side of the second fixing part 554. The middle part of the first limiting semi-ring 562 is provided with a protrusion that matches the size of the first positioning pin 561 to position the positioning pin.

[0045] The positive buffer portion includes a first compression spring 564 and a second compression spring 565. The first compression spring 564 and the second compression spring 565 are respectively arranged in the adjacent first groove 551 and the second groove 552. The first compression spring 564 is arranged close to the positive limit portion. The top of the sleeve of the first compression spring 564 is connected to the circular arc gear synchronization wheel, and the bottom of the spring part of the first compression spring 564 is connected to the bottom of the first groove 551; the bottom of the sleeve of the second compression spring 565 is connected to the focusing ring 57, and the top of the spring part of the second compression spring 565 is connected to the top of the second groove 552.

[0046] The anti-limiting part includes a second positioning pin 566, two second contour pins 568, and a second limiting semi-ring 567. The bottom of the second positioning pin 566 is installed on the focusing ring 57. The upper end of the second positioning pin 566 is arranged in the second groove 552. The tops of the two second contour pins 568 are connected to the first arc gear synchronous wheel 541. The bottoms of the two second contour pins 568 are distributed in two adjacent first grooves 551. The two ends of the second limiting semi-ring 567 are respectively connected to the bottom ends of the second contour pins 568. The second limiting semi-ring 567 is arranged on the lower side of the first fixing part 553. The middle part of the second limiting semi-ring 567 is provided with a protrusion matching the size of the second positioning pin 566 to position the second positioning pin 566.

[0047] The anti-buffer part includes a second compression spring 565 and a first compression spring 564. The first compression spring 564 and the second compression spring 565 are respectively arranged in the adjacent first groove 551 and the second groove 552. The second compression spring 565 is arranged close to the anti-limiting part. The bottom of the sleeve of the second compression spring 565 is connected to the focusing ring 57, and the top of the spring part of the second compression spring 565 is connected to the top of the second groove 552; the top of the sleeve of the first compression spring 564 is connected to the arc gear synchronous wheel, and the bottom of the spring part of the first compression spring 564 is connected to the bottom of the first groove 551.

[0048] like Figure 6 、7 As shown, a tapered hole 571 is provided in the focus ring 57. The focus clamping ring 58 can be provided on the inner side of the focus ring 57. Figure 8 As shown, a plurality of wedge plates 581 are evenly distributed on the upper side of the focus ring 58, and the tilt angle of the wedge plates 581 matches the tilt angle of the focus ring 57. The focus ring 58 is inserted into the gap between the focus ring 57 and the focal ring of the lens 42 so that the focus ring 58 can lock the focal ring.

[0049] Further preferably, a rubber pad is attached to the inner side of the wedge plate 581. The rigid connection between the focus ring 58 and the lens is changed to a flexible connection, which reduces the probability of lens damage.

[0050] An adapter ring 43 is provided on the periphery of the connection position between the detection camera 41 and the lens 42. The outer diameter of the adapter ring 43 is larger than the inner diameter of the adjustment shaft. When the adapter ring 43 contacts the shaft end cover 59, the detection camera 41 cannot continue to descend, which plays a mechanical limit role.

[0051] The working process of this embodiment:

[0052] First, snap the focus ring 58 into the gap between the focus ring 57 and the focal ring of the lens 42 to lock the focal ring. Use the depth of field gauge on the lens 42 to locate the coarse adjustment position for the test distance. The coarse adjustment lifting mechanism drives the lifting support 21 up and down, which then drives the camera and lens 42 up and down, thereby achieving coarse adjustment of the object distance of the lens 42. Fine adjustment of the object distance of the lens 42 is achieved through the fine adjustment lifting and rotating mechanism. The movement of the first circular arc gear synchronous wheel 541 is controlled by a stepper motor 544. The first circular arc gear synchronous wheel 541 drives the focus ring 57 through a floating transmission mechanism, which in turn drives the focal ring of the lens 42, achieving automatic adjustment of the focus of the test camera 41.

[0053] The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An automatic focusing system for a detection camera, characterized in that: It includes: Lifting support, A fine-tuning lifting and rotating mechanism, which is arranged on the lifting support; A camera bracket, wherein the top of the camera bracket is connected to the fine-tuning lifting and rotating mechanism, the bottom of the camera bracket is connected to the detection camera, and the detection camera is connected to the lens; A focusing shaft seat is connected to the bottom of the lifting support. A bearing is provided in the focusing shaft seat. An adjusting shaft is provided in the bearing. A space for accommodating the lens is provided in the adjusting shaft. The inner surface of the adjusting shaft does not contact the lens. The top of the circular arc gear synchronous wheel is connected to the bottom of the focusing shaft, and the circular arc gear synchronous wheel is connected to the driving mechanism through a conveyor belt; A focusing ring connected to the arc gear synchronization wheel via a floating transmission mechanism; A focus clamping ring is provided on the inner side of the focus ring and is inserted into the gap between the focus ring and the focal ring of the lens so as to lock the focal ring tightly. The floating transmission mechanism includes a transmission ring, on which at least two limiting components are provided, each limiting component including a positive limiting portion, a positive buffer portion, a negative limiting portion and a negative buffer portion sequentially arranged along the circumferential direction of the transmission ring; The positive limit part includes a positioning pin, two equal-height pins, and a limiting half ring. The top of the positioning pin is installed on the arc gear synchronous wheel. The lower end of the positioning pin is set in the first groove. The bottoms of the two equal-height pins are connected to the focusing ring. The tops of the two equal-height pins are respectively set in two adjacent second grooves. The two ends of the limiting half ring are respectively connected to the top of the equal-height pins. The limiting half ring is set on the upper side of the second fixing part. A protrusion matching the size of the positioning pin is set in the middle of the limiting half ring to position the positioning pin. The positive buffer portion includes a first compression spring and a second compression spring, which are respectively arranged in adjacent first and second grooves. The first compression spring is arranged close to the positive limit portion. The top of the sleeve of the first compression spring is connected to the circular arc gear synchronization wheel, and the bottom of the spring portion of the first compression spring is connected to the bottom of the first groove; the bottom of the sleeve of the second compression spring is connected to the focusing ring, and the top of the spring portion of the second compression spring is connected to the top of the second groove. The anti-limiting part includes a positioning pin, two equal-height pins, and a limiting half ring. The bottom of the positioning pin is installed on the focusing ring, the upper end of the positioning pin is set in the second groove, the tops of the two equal-height pins are connected to the arc gear synchronization wheel, and the bottoms of the two equal-height pins are distributed in two adjacent first grooves. The two ends of the limiting half ring are respectively connected to the bottom ends of the equal-height pins. The limiting half ring is set on the lower side of the second fixing part, and a protrusion matching the size of the positioning pin is set in the middle of the limiting half ring to position the positioning pin. The anti-buffer part includes a second compression spring and a first compression spring. The first compression spring and the second compression spring are respectively arranged in the adjacent first groove and the second groove. The second compression spring is arranged close to the anti-limiting part. The bottom of the sleeve of the second compression spring is connected to the focusing ring, and the top of the spring part of the second compression spring is connected to the top of the second groove; the top of the sleeve of the first compression spring is connected to the arc gear synchronous wheel, and the bottom of the spring part of the first compression spring is connected to the bottom of the first groove.

2. The automatic focusing system of the detection camera according to claim 1, characterized in that: The fine-tuning lifting and rotating mechanism includes a manual rotating slide and an electric lifting slide. The electric lifting slide is arranged on a lifting support. The ball screw of the electric lifting slide is connected to the output shaft of the servo motor. The manual rotating slide is arranged on the electric lifting slide. The manual rotating slide is connected to the top of the camera bracket.

3. The automatic focusing system of the detection camera according to claim 2, characterized in that: A lifting position sensor is provided on one side of the electric lifting slide.

4. The automatic focusing system of the detection camera according to claim 1, characterized in that: A shaft end cover is provided on the upper side of the focusing shaft, a sensing sheet is installed on the shaft end cover, and a focusing angle sensor is provided on the focusing shaft seat.

5. The automatic focusing system of the detection camera according to claim 1, characterized in that: A plurality of raised portions are evenly arranged on the top of the transmission ring, a first groove is formed between two adjacent raised portions, a second groove opening toward the focusing ring is arranged in the middle of the raised portion, a first fixing portion is evenly arranged on the top outer surface of the raised portion, and a second fixing portion is evenly arranged on the bottom outer surface of the transmission ring.

6. The automatic focusing system of the detection camera according to claim 1, characterized in that: The inner surface of the focusing ring is conical.

7. The automatic focusing system of the detection camera according to claim 6, characterized in that: A plurality of wedge plates are evenly distributed on the upper side of the focus clamping ring, and the inclination angles of the wedge plates match the inclination angle inside the focus ring.

8. The automatic focusing system of the detection camera according to claim 7, characterized in that: A rubber pad is attached to the inner side of the wedge plate.

9. The automatic focusing system of the detection camera according to claim 1, characterized in that: The lifting support is arranged on the coarse adjustment lifting mechanism.

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