Vibration test device for anti-vibration lens

Abstract

The utility model relates to the technical field of detection equipment, in particular to an anti-vibration lens vibration testing device, which is used for detecting the stability of connection between a lens and a camera, and comprises a vibration mechanism, a positioning unit arranged on the vibration mechanism and an illumination unit, the camera comprises a base, at least one mounting plate fixedly arranged on the base and positioning dots arranged on the mounting plate, an illumination unit is arranged on one side of the base and used for supplementing light to the positioning dots, and when a camera is fixedly arranged on the base and a lens corresponds to the positioning dots, the lens and the positioning dots are driven by a vibration mechanism to vibrate synchronously. Therefore, the offset of the optical center of the lens during vibration is detected. The problems of high lens stability detection difficulty and low detection efficiency in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a vibration test device for an anti-vibration lens. Background Art

[0002] In the field of precision manufacturing, high-precision 3D scanners play an important role, especially as the country has vigorously developed the field of intelligent manufacturing in recent years, 3D scanners play an irreplaceable role in the field of machining. In 3D scanners, the stability of the lens directly affects the accuracy of the scanner and plays a very critical role. 3D scanners will be calibrated for accuracy when they leave the factory. It is mainly calibrated based on the internal and external parameters of binocular or monocular vision. If the state of the lens changes, it will cause changes in the calibration internal or external parameters, resulting in abnormal measurement results. Therefore, how to evaluate the stability of the lens is of great significance.

[0003] There are two main methods for evaluating lens stability. One is to knock on the lens and listen to the echo of the lens. If the lens is loose, there will be an echo. This measurement method has high requirements for operators. Operators need to undergo professional training before they can take up their posts. It is also greatly affected by human factors and is highly subjective. Generally, lens manufacturers will use this method for testing. The other is to measure the change in the MTF curve before and after the lens vibrates to evaluate the stability of the lens. This measurement method is less efficient, and the price of the instrument and equipment is relatively high. It is difficult to meet the requirements of full mass production inspection and is generally used for random inspection of products. Utility Model Content

[0004] The purpose of the utility model is to overcome the above technical deficiencies and provide a vibration-resistant lens vibration test device to solve the problems of difficulty in lens stability detection and low detection efficiency in the prior art.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a vibration test device for an anti-vibration lens, which is used to detect the stability of the connection between a lens and a camera. The device comprises a vibration mechanism, a positioning unit arranged on the vibration mechanism, and an illumination unit, wherein the positioning unit comprises a base fixedly connected to the vibration mechanism, at least one mounting plate fixedly arranged on the base, and a positioning dot arranged on the mounting plate; the illumination unit is arranged on one side of the base, and the illumination unit is used to fill light for the positioning dot; when the camera is fixedly arranged on the base and the lens corresponds to the positioning dot, the lens and the positioning dot are driven to vibrate synchronously by the vibration mechanism, so as to detect the offset when the optical center of the lens vibrates.

[0007] In some embodiments, the positioning dot is a cross target or a circular reflective marking dot.

[0008] In some embodiments, the camera is fixedly connected to the base via a plurality of screws.

[0009] In some embodiments, a plurality of connection holes are formed on the base, and the base is fixedly connected to the vibration mechanism by screws passing through the connection holes.

[0010] In some embodiments, the number of mounting plates on the base is -, and the four mounting plates are located in the same plane.

[0011] In some embodiments, the distance between the positioning dot and the camera is 30 cm-50 cm.

[0012] In some embodiments, the mounting plate is fixedly connected to the base by a plurality of screws.

[0013] In some embodiments, the lighting unit is an LED projection lamp.

[0014] In some embodiments, armrests are provided on opposite sides of the base.

[0015] In some embodiments, the vibration mechanism is a high-frequency vibration experimental platform, and the vibration frequency of the vibration mechanism is 200 Hz, and the vibration acceleration is 10G.

[0016] Compared with the prior art, the utility model provides a vibration-resistant lens vibration testing device, which is fixedly connected to a vibration mechanism through a base, wherein at least one mounting plate is fixedly mounted on the base, a positioning dot is arranged on the mounting plate, and an illumination unit is arranged on one side of the base, and the illumination unit is used to fill light for the positioning dot. When the camera is fixedly mounted on the base and the lens corresponds to the positioning dot, the lens and the positioning dot are driven to vibrate synchronously through the vibration mechanism to detect the offset of the optical center of the lens during vibration. The change of the optical center of the lens is judged by the image coordinates of the positioning dot taken by the camera, which is simple and direct. The measurement method has no quality requirements for the operator, and the operator can operate and implement it after simple training, and the judgment error is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of a vibration test device for an anti-vibration lens;

[0018] Figure 2 is a front view of an embodiment of a vibration test device for a vibration-resistant lens;

[0019] Figure 3 is a structural schematic diagram of another embodiment of a vibration test device for an anti-vibration lens;

[0020] Figure 4 The present invention is a front view of another embodiment of a vibration-resistant lens vibration testing device. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] See also Figures 1 to 4 In order to solve the current lens stability evaluation problem, a vibration-resistant lens vibration test device is proposed. The device uses a vibration platform to vibrate the lens and observes the offset of the optical center during the vibration process to evaluate the stability of the lens.

[0023] In this specific embodiment, a vibration-resistant lens vibration test device is used to detect the stability of the connection between the lens 1 and the camera 2, including a vibration mechanism 3, a positioning unit 4 arranged on the vibration mechanism 3, and an illumination unit 5, wherein the positioning unit 4 includes a base 41 fixedly connected to the vibration mechanism 3, at least one mounting plate 42 fixedly arranged on the base 41, and a positioning dot 43 arranged on the mounting plate 42, the illumination unit 5 is arranged on one side of the base 41, and the illumination unit 5 is used to fill light for the positioning dot 43. When the camera 2 is fixedly arranged on the base 41 and the lens 1 corresponds to the positioning dot 43, the lens 1 and the positioning dot 43 are driven to vibrate synchronously by the vibration mechanism 3 to detect the offset of the optical center of the lens 1 when it vibrates.

[0024] During actual use, the camera 2 to be tested is fixed on the base 41, so that the lens 1 corresponds to the positioning dot 43 on the mounting plate 42, and the positioning dot 43 is supplemented with light by the lighting unit 5 to illuminate the positioning dot 43, and then the lens 1 and the positioning dot 43 are driven to vibrate synchronously for a period of time by the vibration mechanism 3. The change of the optical center of the lens 1 is judged by the image coordinates of the positioning dot 43 taken by the camera 2, which is simple and direct.

[0025] In one embodiment, when the positioning dot 43 is a cross target, the illumination unit 5 is disposed on the back side of the cross target, the cross target is illuminated by the illumination unit 5, and an imaging system composed of a camera and a lens is used to form an image. The vibration mechanism 3 vibrates at a fixed frequency and acceleration, the relative positions of the lens and the cross target are fixed, and the coordinate changes of the center of the cross target on the camera are tracked, namely the changes of the center of light when the lens vibrates.

[0026] In another embodiment, when the positioning dot 43 is a circular reflective mark point, the illumination unit 5 is disposed in front of the reflective mark point, the reflective mark point is illuminated by the illumination unit 5, and an imaging system composed of a camera 2 and a lens 1 is used to form an image. The vibration mechanism 3 vibrates at a fixed frequency and acceleration, the relative positions of the lens 1 and the reflective mark point are fixed, and the coordinate changes of the center of the reflective mark point on the camera are tracked, namely the changes of the center of light when the lens vibrates.

[0027] It should be noted that, in order to facilitate fixing the camera 2 on the base 41, in an embodiment, a plurality of threaded connection holes are provided on the base 41, and the camera 2 is fixed on the base 41 by a plurality of screws cooperating with the threaded connection holes.

[0028] In one embodiment, a plurality of connection holes are formed on the base 41 , and the base 41 is fixedly connected to the vibration mechanism 3 by screws passing through the connection holes.

[0029] On the basis of the above scheme, in order to improve the detection efficiency of the lens 1, specifically, multiple lenses can be detected at the same time. In one embodiment, the number of mounting plates 42 on the base 41 is 1-4, and the four mounting plates 42 are located in the same plane. In this specific embodiment, the number of mounting plates 42 on the base 41 is two, and the two mounting plates 42 are located in the same plane. Two cameras 2 are respectively fixed on the base 41, and correspond one-to-one to the two mounting plates 42 respectively.

[0030] In one embodiment, the distance between the positioning dot 43 and the camera 2 is 30 cm-50 cm. Specifically, the distance between the positioning dot 43 and the camera 2 is 40 cm. At the same time, the focal length can be adjusted by rotating the lens 1.

[0031] In one embodiment, the bottom of the mounting plate 42 is provided with a plurality of connection holes, the base 41 is provided with a plurality of threaded holes, and the mounting plate 42 is fixedly connected to the base 41 by a plurality of screws. Wherein, handrails 44 are provided on opposite sides of the base 41.

[0032] In one embodiment, the illumination unit 5 is an LED projection lamp. The strong light emitted by the illumination unit 5 can illuminate the positioning dot 43 so that the camera can clearly capture the positioning dot.

[0033] In this specific embodiment, the vibration mechanism 3 is a high-frequency vibration experimental platform, and the vibration frequency of the vibration mechanism 3 is 200 Hz, and the vibration acceleration is 10 G. It should be noted that the vibration mechanism 3 drives the lens 1 and the positioning dot 43 to vibrate for 5 minutes.

[0034] The beneficial effects are:

[0035] Compared with the prior art, the utility model provides a vibration-resistant lens vibration testing device, which is fixedly connected to a vibration mechanism through a base, at least one mounting plate is fixedly arranged on the base, a positioning dot is arranged on the mounting plate, and an illumination unit is arranged on one side of the base, and the illumination unit is used to fill light for the positioning dot. When the camera is fixedly arranged on the base and the lens corresponds to the positioning dot, the lens and the positioning dot are driven to vibrate synchronously through the vibration mechanism to detect the offset of the optical center of the lens when it vibrates; the change of the optical center of the lens is judged by the image coordinates of the positioning dot taken by the camera, which is simple and direct. The measurement method has no quality requirements for the operator, and the operator can operate and implement it after simple training. The judgment error is low, the device structure is simple, and it is suitable for wide promotion and application.

[0036] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A vibration test device for anti-vibration lens, used to detect the stability of the connection between the lens and the camera, characterized in that: It includes a vibration mechanism, a positioning unit arranged on the vibration mechanism, and an illumination unit, wherein the positioning unit includes a base fixedly connected to the vibration mechanism, at least one mounting plate fixedly arranged on the base, and a positioning dot arranged on the mounting plate, the illumination unit is arranged on one side of the base, and the illumination unit is used to fill light for the positioning dot. When the camera is fixed on the base and the lens corresponds to the positioning dot, the lens and the positioning dot are driven to vibrate synchronously by the vibration mechanism to detect the offset of the optical center of the lens when it vibrates.

2. The vibration test device for anti-vibration lens according to claim 1, characterized in that: The positioning dot is a cross target or a circular reflective marking point.

3. The vibration test device for anti-vibration lens according to claim 1, characterized in that: The camera is fixedly connected to the base via a plurality of screws.

4. The vibration test device for anti-vibration lens according to claim 1, characterized in that: The base is provided with a plurality of connection holes, and the base is fixedly connected to the vibration mechanism by screws passing through the connection holes.

5. The vibration test device for anti-vibration lens according to claim 1, characterized in that: The number of the mounting plates on the base is -, and the four mounting plates are located in the same plane.

6. The vibration test device for anti-vibration lens according to claim 1, characterized in that: The distance between the positioning dot and the camera is 30cm-50cm.

7. The vibration test device for anti-vibration lens according to claim 1, characterized in that: The mounting plate is fixedly connected to the base via a plurality of screws.

8. The vibration test device for anti-vibration lens according to claim 1, characterized in that: The illumination unit is an LED projection lamp.

9. The vibration test device for anti-vibration lens according to claim 1, characterized in that: Armrests are arranged on opposite sides of the base.

10. The vibration test device for anti-vibration lens according to claim 1, characterized in that: The vibration mechanism is a high-frequency vibration experimental platform, and the vibration frequency of the vibration mechanism is 200 Hz, and the vibration acceleration is 10G.

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