Lens shake eccentricity detection device

Abstract

The utility model discloses a lens vibration eccentricity detection device relates to lens eccentricity detection technical field. The device includes: light source generator, is fixed in the horizontal surface of detection platform, and the object side of measured lens is fixedly connected with light source generator, projection plane is set up in the image side of measured lens, the projection plane is equipped with positioning figure, is used for the optical signal of light source generator and forms the projection on the projection plane through measured lens, camera, with projection plane opposite setting, is used for real -time shooting the image on projection plane, including the optical signal image of measured lens still time and the optical signal image of measured lens when being subjected to the vibration, terminal equipment is connected with camera, obtains the image of camera shooting, through comparing the optical signal image of measured lens still time and the optical signal image of measured lens when being subjected to the vibration, detects the eccentricity when the lens vibration.

Description

Technical Field

[0001] This utility model relates to the field of lens eccentricity detection technology, specifically to a lens vibration eccentricity detection device. Background Technology

[0002] In the design and manufacture of high-precision optical systems, ensuring the precise alignment of each optical component is crucial. Eccentricity error, where the optical axis of an optical component does not coincide with its mechanical axis, severely impacts the system's imaging quality and performance. Therefore, optical eccentricity detection technology has become an indispensable part of optical engineering.

[0003] Existing lens manufacturing processes only focus on detecting eccentricity under static conditions. However, lenses do not always operate in static environments after assembly, and the fit between the lens and lens elements may not be perfectly tight, leading to eccentricity due to vibration during operation. Therefore, there is an urgent need for a detection system to detect lens eccentricity caused by vibration. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a lens vibration eccentricity detection device, which realizes a simple and fast detection of the lens eccentricity when vibrating.

[0005] This utility model is implemented as follows:

[0006] A lens vibration eccentricity detection device includes:

[0007] The light source generator is fixed to the horizontal plane of the testing stage, and the object side of the lens being tested is fixedly connected to the light source generator.

[0008] The projection plane is set on the image side of the lens under test. The optical signal of the light source generator is projected onto the projection plane through the lens under test. The projection plane is provided with positioning patterns.

[0009] A camera is positioned facing the projection plane and is used to capture images on the projection plane in real time, including optical signal images when the lens under test is stationary and optical signal images when the lens under test is vibrated.

[0010] The terminal device is connected to the camera, acquires images captured by the camera, and detects the eccentricity of the lens when it vibrates by comparing the optical signal image of the lens when it is stationary with the optical signal image of the lens when it is vibrated.

[0011] Furthermore, the camera is fixed to the horizontal plane of the detection platform and set at an angle to the light source generator.

[0012] Furthermore, the light source generator is a cross-shaped light source generator.

[0013] Furthermore, the projection plane is a projection plate.

[0014] Furthermore, the positioning pattern on the projection board is a square grid.

[0015] Furthermore, the object side of the lens under test is fixedly connected to the light source generator via a connector.

[0016] Furthermore, the terminal device is also connected to a light source generator to control the light source generator to generate optical signals.

[0017] Furthermore, it also includes a vibration device for generating a set value of force to act on the lens being tested.

[0018] The advantages of this utility model are:

[0019] An optical signal is generated by a light source generator and projected onto a projection plane by the lens under test. The optical signal images of the lens under test when it is stationary and when it is vibrated are acquired by a camera. This allows for a simple and quick detection of lens eccentricity during vibration, without the need for a complex data analysis process, resulting in high detection efficiency. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of a lens vibration eccentricity detection device according to the present invention;

[0022] Figure 2 This is a schematic diagram of the positioning pattern on the projection plane of this utility model. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings and specific embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Please see Figure 1 As shown, this embodiment provides a lens vibration eccentricity detection device 100, including:

[0027] The light source generator 1 is fixed on the horizontal plane of the test stage 4, and the object side of the lens 200 being tested is fixedly connected to the light source generator 1.

[0028] Projection plane 2 is set on the image side of the lens under test 200. The optical signal of the light source generator 1 is projected onto the projection plane by the lens under test. The projection plane 2 is provided with positioning patterns.

[0029] Camera 3 is positioned opposite to the projection plane 2 and is used to capture images on the projection plane 2 in real time, including optical signal images when the lens under test 200 is stationary and optical signal images when the lens under test 200 vibrates. In this embodiment, camera 3 is fixed to the horizontal plane of the testing platform 4 and is positioned at an angle to the light source generator.

[0030] A terminal device (not shown) is connected to the camera 3 to acquire images captured by the camera 3. By comparing the optical signal image of the lens under test when it is stationary with the optical signal image of the lens under test when it is vibrated, the eccentricity of the lens when it vibrates is detected.

[0031] Preferably, the light source generator 1 is a cross-shaped light source generator, model DLP2022UVM-LC.

[0032] Preferably, the projection plane 2 is a projection plate, and the positioning pattern on the projection plate can be a square grid, and may also include a circle to indicate the center point, such as... Figure 2 As shown. The positioning pattern can also be a dot or a cross. The purpose of this positioning pattern is to align the center point of the optical signal from the light source generator 1 with the designated position on the projection plane 2. Any pattern that can achieve this effect can be used as a positioning pattern. The projection plane 2 may also be without any positioning pattern.

[0033] Preferably, the terminal device is also connected to the light source generator 1, and controls the light source generator 1 to generate optical signals. It can acquire images captured by the camera 3 at the same time as controlling the light source generator 1 to generate optical signals.

[0034] In a simpler implementation, vibration can be generated by a tester tapping the lens with their bare hand, thus creating eccentricity (the light source generator 1 is fixed to the horizontal plane of the test stage 4, and the object side of the lens under test 200 is fixedly connected to the light source generator 1; the tapping will not cause displacement of the light source generator 1 and the lens under test 200, but may only cause the lens inside the lens under test 200 to shift). The amount of eccentricity of the lens during vibration is detected by comparing the optical signal image of the lens under test when it is stationary with the optical signal image of the lens under test when it is vibrated.

[0035] In another possible implementation, a vibration device (not shown) may be included to generate a set value of force applied to the lens 200 under test. The vibration device can generate a more precise force on the lens, and an existing vibration device capable of achieving this effect can be used.

[0036] The working principle of this utility model is as follows:

[0037] Since the light source generator 1 is fixed to the horizontal plane of the testing platform 4, and the object side of the lens under test 200 is fixedly connected to the light source generator 1, a slight tap will not cause displacement of the light source generator 1 or the lens under test 200. It may only cause the lens inside the lens under test 200 to shift. Therefore, if the lens does not shift when tapped, the optical signal image of the lens under test when vibrating is consistent with the optical signal image of the lens under test when stationary, which means that the projection position of the optical signal remains unchanged. If the lens shifts when tapped, since the surface of the lens is spherical, the optical signal of the light source generator 1 will produce different refraction angles at different positions of the lens, thus changing the projection position of the optical signal.

[0038] The testing process can be summarized as follows:

[0039] Fix the light source generator 1 on the horizontal surface of the testing platform 4, aligning the center point of the cross-shaped light source generated by the light source generator 1 with the center point of the positioning graphic on the projection board. Fix the camera 3 on the horizontal surface of the testing platform 4, setting it at an angle to the light source generator 1, ensuring that the image captured by the camera 3 includes the center point of the cross-shaped light source (the camera 3 acquires a pixel-level magnified image of a small area around the center point of the cross-shaped light source; the camera 3 model can be MV-CS055-50UM). Connect the lens under test 200 to the connector fixed on the light source generator 1. One end of the connector has a threaded groove that matches the lens under test 200, and the other end is fixedly connected to the light source generator, for example, by securing it to the front end of the light source generator with four screws. The center of the connector is coaxial with the center of the light source. Connect the terminal device to the camera 3 to acquire the cross-shaped light source image captured by the camera 3, and use existing software to set a fixed position mark at the center point of the cross-shaped light source image when the lens under test 200 is stationary.

[0040] Images are continuously acquired in real time via a terminal device, and the lens under test is struck by hand or with a vibration device. If the lens shifts upon impact, the center point of the optical signal projection will change relative to a fixed position mark, indicating lens eccentricity. The distance of the center point of the optical signal relative to the fixed position mark represents the lens eccentricity during vibration. Multiple tests can be performed, and the maximum or average value of the shift can be taken as the lens vibration eccentricity detection result.

[0041] After the current lens under test 200 has been tested, remove it and then replace it with another lens under test, testing it in the same way. If it is necessary to change the model of the lens under test 200, the connector that matches the new lens under test 200 must also be replaced at the same time.

[0042] This invention uses a light source generator to produce optical signals that are projected onto a projection plane by the lens under test. The camera acquires optical signal images of the lens under test when it is stationary and when it is vibrated. This allows for a simple and quick detection of lens eccentricity during vibration, without the need for complex data analysis processes, resulting in high detection efficiency.

[0043] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A lens shake eccentricity detection device characterized by comprising: include: The light source generator is fixed to the horizontal plane of the testing stage, and the object side of the lens being tested is fixedly connected to the light source generator. The projection plane is set on the image side of the lens under test. The optical signal of the light source generator is projected onto the projection plane through the lens under test. A camera is positioned facing the projection plane and is used to capture images on the projection plane in real time, including optical signal images when the lens under test is stationary and optical signal images when the lens under test is vibrated. The terminal device is connected to the camera, acquires images captured by the camera, and detects the eccentricity of the lens when it vibrates by comparing the optical signal image of the lens when it is stationary with the optical signal image of the lens when it is vibrated.

2. The lens shake and decentering detection device according to claim 1, characterized by: The camera is fixed to the horizontal plane of the detection platform and is set at an angle to the light source generator.

3. The lens shake and decentering detection device according to claim 1, characterized by: The light source generator is a cross-shaped light source generator.

4. The lens vibration eccentricity detection device according to claim 1, characterized in that: The projection plane is a projection board.

5. The lens vibration eccentricity detection device according to claim 4, characterized in that: The positioning pattern on the projection board is a square grid.

6. The lens vibration eccentricity detection device according to claim 1, characterized in that: The object side of the lens under test is fixedly connected to the light source generator via a connector.

7. The lens vibration eccentricity detection device according to claim 1, characterized in that: The terminal device is also connected to a light source generator to control the light source generator to generate optical signals.

8. The lens vibration eccentricity detection device according to claim 1, characterized in that: It also includes a vibration device to generate a set value of force to be applied to the lens being tested.

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