A multi-light-path reflective lens surface curvature center position detection method and system

Abstract

The application provides a kind of multi-light path reflection type lens surface curvature center position detection method and system, detection system includes light source module, cross line target, half transparent half reflection prism, multi-channel collimator, color combiner, several mirrors and image acquisition module, multiple lens surface curvature center positions can be detected simultaneously, solve the problem that the existing reflection type lens surface curvature center position detection device can only detect the curvature center of one lens surface each time, greatly improve the detection efficiency, also reduce the purchase cost of customer;And the detection method of the application can detect multiple lens surface curvature center positions simultaneously under the condition of the same rotation of the rotary adjusting mechanism, without considering the precision error of the rotary adjusting mechanism itself, the detection precision is higher, the consistency is better, the detection accuracy is greatly improved.And since the precision error of the rotary adjusting mechanism itself does not need to be considered, the cost of parts will be greatly reduced.

Description

Technical Field

[0001] This application relates to the field of lens inspection, specifically to a method and system for detecting the center position of curvature on the surface of a multi-path reflective lens. Background Technology

[0002] Currently available reflective lens surface curvature center position detection devices are all single-channel reflective detection systems, consisting of a light source system, industrial camera, crosshair target, semi-reflective prism, collimating optical system, objective lens, lens rotation adjustment mechanism, and computer. Because existing reflective lens surface curvature center position detection devices only have one collimating optical system and objective lens, each detection can only detect the curvature center position of one lens surface. Detecting the curvature center of multiple lens surfaces requires multiple detections, resulting in low detection efficiency (approximately 20 seconds per single-sided single-detection).

[0003] Furthermore, since the testing requires the use of a rotation method, meaning the lens or lens under test needs to be rotated 360 degrees, and the rotation adjustment mechanism itself needs to be rotated 360 degrees, the rotation adjustment mechanism itself will have accuracy errors in radial runout and axial runout. Therefore, each rotation inevitably introduces the accuracy error of the rotation adjustment mechanism itself. As a result, the accuracy requirements for the radial runout, axial runout, rotation angle, and rotation starting angle of the rotation adjustment mechanism are very high, reaching an accuracy within 100 nanometers and within 2 arcseconds, resulting in very high component costs. Summary of the Invention

[0004] To address the problems of low detection efficiency, accuracy errors, and high cost of existing reflective lens surface curvature center position detection devices, this invention provides a method and system for detecting the surface curvature center position of multi-optical-path reflective lenses. This method can simultaneously detect the curvature center positions of multiple lens surfaces, solving the problem that existing reflective lens surface curvature center position detection devices can only detect the curvature center of one lens surface at a time. This significantly improves detection efficiency and reduces customer procurement costs.

[0005] To achieve the above objectives, the present invention provides a multi-path reflective lens surface curvature center position detection system, which includes at least a light source module, a crosshair target, a semi-transparent and semi-reflective prism, a multi-path collimator, a color combining prism, several reflectors, and an image acquisition module. The light source module is used to emit light of various wavelengths according to the number of surfaces of the lens under test. The light of various wavelengths passes through the crosshair target, enters the semi-transparent and semi-reflective prism, and then exits. Light rays of different wavelengths emitted from a semi-transparent and semi-reflective prism pass through a corresponding collimator via different paths; Multiple beams of light passing through the multi-path collimator enter the color combining prism from different angles, either directly or through reflection by a mirror. The color combining prism integrates all the light bands and then exits onto the lens under test. Adjust each collimator separately so that each beam of light is focused at the center of curvature of the surface of each lens under test; Part of the light rays from each path are reflected back to the semi-transparent prism and then directly pass through the semi-transparent prism to be focused onto the image acquisition module to form an image.

[0006] As described above, the multi-path reflective lens surface curvature center position detection system includes a light source module comprising multiple sets of single light source units for individually emitting light of one wavelength. Each set of single light source units is equipped with a crosshair target and a semi-transparent semi-reflective prism between itself and the corresponding collimator. The multiple wavelengths of light emitted by the multiple sets of single light source units pass through the corresponding crosshair target, enter the corresponding semi-transparent semi-reflective prism, and then exit towards the corresponding collimator through different paths.

[0007] As described above, the multi-path reflective lens surface curvature center position detection system includes a light source module comprising a composite light source unit. Multiple wavelengths of light are emitted individually by the composite light source unit, pass through a crosshair target, enter a semi-transparent and semi-reflective prism, and then exit. A dichroic prism and several reflectors are arranged between the semi-transparent and semi-reflective prism and the multi-path collimator. Multiple wavelengths of light emitted from the semi-transparent and semi-reflective prism enter the dichroic prism and exit directly or are reflected by the reflectors to pass through the corresponding collimator along different paths.

[0008] As described above, the multi-path reflective lens surface curvature center position detection system has a color-combining prism equipped with a color-combining prism adjustment mechanism for adjusting the distance between it and the lens to be tested.

[0009] As described above, the multi-path reflective lens surface curvature center position detection system has a collimator adjustment mechanism on the collimator for adjusting its overall height position.

[0010] As described above, in a multi-path reflective lens surface curvature center position detection system, the collimator has an objective lens with an objective lens adjustment mechanism for adjusting its position in the horizontal direction.

[0011] As described above, the multi-path reflective lens surface curvature center position detection system has a reflector adjustment mechanism on the reflector for adjusting its tilt angle.

[0012] The multi-path reflective lens surface curvature center position detection system described above uses an X-Cube color-combining prism, which is coated with several layers to reflect light from different angles in the same direction.

[0013] The multi-path reflective lens surface curvature center position detection system described above also includes a rotation adjustment mechanism for driving the lens under test to rotate.

[0014] Another objective of this application is to provide a method for detecting the center position of curvature on the surface of a multi-path reflective lens, comprising the following steps: Depending on the number of surfaces of the lens to be tested, various wavelengths of light are emitted. These wavelengths of light pass through the crosshair target, enter the semi-transparent and semi-reflective prism, and then exit. The emitted light rays of different wavelengths pass through their respective collimators via different paths; Multiple beams of light passing through the multi-path collimator enter the color combining prism from different angles, and are then combined by the color combining prism to exit onto the lens under test. Adjust each collimator separately so that each beam of light is focused at the center of curvature of the surface of each lens under test; Part of the light rays from each path are reflected back to the semi-transparent prism and then directly pass through the semi-transparent prism to be focused onto the image acquisition module to form an image.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a method and apparatus for detecting the curvature center position of a multi-path reflective lens surface, including a light source module, a crosshair target, a semi-transparent and semi-reflective prism, a multi-path collimator, a color-combining prism, several reflectors, and an image acquisition module. It can simultaneously detect the curvature center positions of multiple lens surfaces, solving the problem that existing reflective lens surface curvature center position detection devices can only detect the curvature center of one lens surface at a time, greatly improving detection efficiency and reducing customer procurement costs. Furthermore, this method can simultaneously detect the curvature center positions of multiple lens surfaces under the condition that the rotation adjustment mechanism rotates in the same manner, without considering the accuracy error of the rotation adjustment mechanism itself. Its detection accuracy is higher and consistency is better, greatly improving detection accuracy. Moreover, since the accuracy error of the rotation adjustment mechanism itself is not considered, the component cost will be significantly reduced. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram illustrating the principle of existing detection methods; Figure 2 This is a schematic diagram of the curvature center position detection for existing single-path reflective multifaceted cemented lenses; Figure 3 This is a schematic diagram illustrating the principle of the testing method in this application; Figure 4 This is a schematic diagram illustrating the principle of another detection method in this application; Figure 5This is a schematic diagram of the curvature center position detection of the multi-optical-path reflective multifaceted cemented lens of this application; Figure 6 This is a front view of the specific implementation method of this application; Figure 7 This is a side view of the specific implementation method of this application; In the diagram: Light source module 1, blue light 11, green light 12, red light 13, crosshair target 2, semi-transparent and semi-reflective prism 3, collimator 4, collimator adjustment mechanism 41, clamping component 411, slide table 412, electric linear motion module 413, objective lens 42, objective lens adjustment mechanism 43, color combining prism 5, color combining prism adjustment mechanism 51, moving platform 511, linear guide rail 512, moving platform locking mechanism 513, reflector 6, reflector adjustment mechanism 61, image acquisition module 7, color separating prism 8, reflector 9, lens under test A, rotation adjustment mechanism B. Detailed Implementation

[0018] This application provides a multi-path reflective lens surface curvature center position detection system, which includes at least a light source module 1, a crosshair target 2, a semi-transparent and semi-reflective prism 3, a multi-path collimator 4, a color combining prism 5, several reflectors 6, and an image acquisition module 7.

[0019] In a specific embodiment of this application, the light source module 1 provides light of various wavelengths, such as blue light 11, green light 12, and red light 13. The light passes through the crosshair target 2, enters the semi-transparent and semi-reflective prism 3, passes through the corresponding collimator 4 optical system, and is focused by the objective lens 42. The middle path of light enters the lower X-Cube color combining prism 5 and exits directly. By adjusting the height of the collimator 4 optical system, this path of light is focused at the curvature center of one of the lens surfaces. At the same time, part of the light returns to the semi-transparent and semi-reflective prism 3 and passes directly through the semi-transparent and semi-reflective prism 3 to be focused on the CCD sensor of the image acquisition module 7, forming a clear crosshair image. The other two beams of light, each with a different wavelength, pass through the corresponding collimator 4 optical system, are focused by the objective lens 42, and are reflected by the corresponding mirrors 6. They then enter the X-Cube color-combining prism 5 from 90° and -90° directions, respectively. After being reflected by different coating layers of the X-Cube color-combining prism 5, they exit below the X-Cube color-combining prism 5. By controlling the height of each collimator 4 optical system, the beams of light can be focused at the curvature center of each lens surface. Some of the beams of light return along their original paths to the corresponding semi-transparent and semi-reflective prism 3, and pass directly through the semi-transparent and semi-reflective prism 3 to be focused on the CCD sensor of the corresponding image acquisition module 7, forming clear crosshair images. Multiple light rays of different wavelengths pass through the above system and form clear crosshair images on the CCD sensors of their respective industrial cameras. After the software detection program is started, the lens or lens A under test is rotated 360° under the drive of the rotation adjustment mechanism B. The center of the crosshair image on the corresponding industrial camera CCD sensor will be drawn with a trajectory circle. After processing and analyzing the trajectory circles on the CCD sensors of different industrial cameras by a dedicated software algorithm, the corresponding position data of the curvature center of each lens surface corresponding to each wavelength of light and the offset data of the curvature center of each lens surface will be obtained. The software will automatically output and save the data.

[0020] like Figure 2 As shown, this is a schematic diagram of the curvature center position detection of a single-path reflective multifaceted cemented lens in the prior art. The left side shows one type of lens under test, which is a cemented lens with three lens surfaces. The right side shows another type of cemented component consisting of two lenses and a prism. The S2' surface is the equivalent surface of the S2 surface of the side lens, which is bent at 90 degrees. The existing detection method can only detect the position of the curvature center of one lens surface at a time using a single optical path.

[0021] like Figure 5 As shown, this application presents a schematic diagram of the curvature center position detection of a multi-optical-path reflective multi-faceted cemented lens. The left side shows one type of lens under test, which is a cemented lens with three lens surfaces. The right side shows another type of cemented component consisting of two lenses and a prism. The S2' surface is the equivalent surface of the S2 surface of the side lens, which is bent at 90 degrees. The multi-optical-path detection method of this application can detect the position of the curvature center of multiple lens surfaces at a time.

[0022] This invention provides a multi-path reflective lens surface curvature center position detection system, which can simultaneously detect the curvature center positions of multiple lens surfaces. This solves the problem that existing reflective lens surface curvature center position detection devices can only detect the curvature center of one lens surface at a time, significantly improving detection efficiency and reducing customer procurement costs. Furthermore, since the detection requires a rotation method—that is, the lens or lens under test needs to rotate 360 ​​degrees, meaning the rotation adjustment mechanism rotates 360 degrees—the rotation adjustment mechanism itself has radial and axial runout accuracy errors. Therefore, each rotation inevitably introduces the accuracy error of the rotation adjustment mechanism itself. Thus, this invention's multi-path reflective lens surface curvature center position detection method can simultaneously detect the curvature center positions of multiple lens surfaces under the condition of a single rotation of the rotation adjustment mechanism, without considering the accuracy error of the rotation adjustment mechanism itself. Its detection accuracy is higher, consistency is better, and the accuracy of detection is greatly improved. Moreover, since the accuracy error of the rotation adjustment mechanism itself is not considered, the component cost will be significantly reduced.

[0023] like Figure 3As shown in the preferred embodiment of this application, the light source module 1 includes multiple sets of single light source units for individually emitting light of one wavelength. Each set of single light source units is equipped with a crosshair target 2 and a semi-transparent, semi-reflective prism 3 between itself and a corresponding collimator 4. The various wavelengths of light emitted by the multiple sets of single light source units pass through the corresponding crosshair target 2, enter the corresponding semi-transparent, semi-reflective prism 3, and then exit towards the corresponding collimator 4 through different paths. In this embodiment, a light source system with different wavelengths is used, such as red, green, and blue LED light sources. The light source can emit light of different wavelengths individually, and the brightness of each wavelength can be adjusted independently. This solution consists of a multi-channel independent light source system, an image acquisition system, a collimator 4 optical system, and an objective lens adjustment system. Multiple light rays of different wavelengths are reflected by a reflector 6, and after being integrated by an X-Cube color-combining prism 5, all light rays are emitted in the same direction and focused at the curvature center of different lens surfaces. Some light rays are reflected back along their original path to a semi-transparent and semi-reflective prism 3, and then pass directly through the semi-transparent and semi-reflective prism 3, forming a clear crosshair image on the CCD sensors of each industrial camera. Finally, the software automatically analyzes the position information of the crosshair images from different industrial cameras, thereby achieving the detection purpose.

[0024] like Figure 4 As shown, in another embodiment of this application, the light source module 1 includes a composite light source unit. Multiple wavelengths of light are emitted individually by the composite light source unit and then pass through the crosshair target 2, enter the semi-transparent and semi-reflective prism 3, and then exit. A dichroic prism and several reflectors are provided between the semi-transparent and semi-reflective prism 3 and the multi-path collimator 4. Multiple wavelengths of light emitted from the semi-transparent and semi-reflective prism 3 enter the dichroic prism 8 and then exit directly or are reflected by the reflectors 9 to pass through the corresponding collimator 4 through different paths. As an alternative to this application, a single-channel composite light source system and image acquisition system can be used in conjunction with a multi-channel collimator 4 optical system and objective lens adjustment system. Light of different wavelengths enters the dichroic prism 8 in the same direction. Specifically, the dichroic prism 8 is an X-Cube dichroic prism. Through the reflection of the dichroic prism 8, light of different wavelengths is emitted in different directions. After being reflected by the reflector 9, light of different wavelengths enters the respective collimator 4 optical system and objective lens adjustment system. After being reflected by the reflector 6, all wavelengths of light are integrated by the X-Cube dichroic prism 5 and emitted in the same direction. They are focused at the curvature center positions of different lens surfaces. Some light is reflected back to the semi-transparent and semi-reflective prism 3 along the original path and passes directly through the semi-transparent and semi-reflective prism 3, forming multiple clear crosshair images of different wavelengths on the CCD sensor of the same industrial camera. Finally, the software automatically analyzes the position information of the crosshair images of different wavelengths, thereby achieving the detection purpose.

[0025] In a preferred embodiment of this application, the color-combining prism 5 is provided with a color-combining prism adjustment mechanism 51 for adjusting the distance between its corresponding test lenses. This design ensures that the focusing position of one path of light roughly coincides with the curvature center position of each lens surface. In a specific embodiment, such as... Figure 6 As shown, the color-combining prism adjustment mechanism 51 specifically includes a moving platform 511, a linear guide rail 512, and a moving platform locking mechanism 513. The moving platform 511 is slidably mounted on the linear guide rail 512, and the color-combining prism 5 is mounted on the moving platform 511. The moving platform is manually slid up and down to change the relative distance between the X-Cube color-combining prism 5 and the lens to be tested, so that the focusing position of one of the light rays roughly coincides with the curvature center position of each lens surface. The relative position can be fixed after the adjustment is completed by the moving platform locking mechanism 513.

[0026] In a preferred embodiment of this application, the collimator 4 is provided with a collimator adjustment mechanism 41 for adjusting its overall height position. This design is used to change the focusing position of light rays of different wavelengths. In a specific embodiment, such as... Figure 6 and 7 As shown, the collimator adjustment mechanism 41 includes a clamping member 411, a slide table 412, and an electric linear motion module 413. The clamping member is used to mount each collimator 4 as a whole, and each collimator 4 is slidably mounted on the electric linear motion module 413 via the slide table 412. The multiple electric linear motion modules 413 drive the entire mechanism to move up and down linearly via the slide table 412, thereby changing the focusing position of light in different wavelengths. During adjustment, different wavelength light sources are turned on sequentially, and the position of the mechanism is moved up and down respectively. An industrial camera is used to capture the corresponding focal image, and an image processing algorithm is used to identify the clear imaging position of the crosshair target 2 to determine whether the light in that wavelength is accurately focused on the center of the lens curvature. The above adjustment and detection process is repeated until all wavelengths are accurately focused.

[0027] In a preferred embodiment of this application, the objective lens 42 on the collimator 4 is provided with an objective lens adjustment mechanism 43 for adjusting its position in the horizontal direction. The optical axis direction is adjusted using the objective lens adjustment mechanism 43 in the optical path, such as... Figure 7 As shown, the objective lens adjustment mechanism 43 of this application is an XY adjustment mechanism that allows the objective lens 42 to be rotated and mounted. Through the objective lens XY adjustment mechanism, the position of the objective lens in the horizontal direction is adjusted so that the optical axis is aligned with the center of the lens under test, ensuring that light of each wavelength can accurately incident on the designated area of ​​the lens surface. During adjustment, different wavelength light sources are turned on sequentially, and corresponding focal images are acquired using an industrial camera. The image processing algorithm identifies the clear imaging position of the crosshair target 2, and the objective lens XY adjustment mechanism is adjusted to ensure that the clear imaging position of the crosshair target 2 is approximately located at the center of the CCD sensor.

[0028] In a preferred embodiment of this application, the reflector 6 is provided with a reflector adjustment mechanism 61 for adjusting its tilt angle. The reflector adjustment mechanism 61 is used to adjust the direction of the optical path. Specifically, it can be adjusted by rotating the fixing nut of the reflector 6. The reflector adjustment mechanism 61 adjusts the tilt angle of the reflector 6 in the 45° direction so that the optical axis is aligned with the center of the lens A under test after reflection, ensuring that light of each wavelength can accurately enter the designated area on the lens surface. During adjustment, different wavelength light sources are turned on in sequence, and the corresponding focal images are acquired using an industrial camera. The image processing algorithm identifies the clear imaging position of the crosshair target 2, and the reflector 6 is adjusted to ensure that the clear imaging position of the crosshair target 2 is approximately located at the center of the CCD sensor. Furthermore, for different distances from the spherical center image on the lens surface, different focal lengths of objective lenses can be used to achieve focusing.

[0029] In a specific embodiment of this application, the color combining prism 5 is an X-Cube color combining prism 5. The color combining prism 5 is coated with several coating layers for reflecting light from different angles in the same direction. In the optical path of this application, the X-Cube color combining prism is used to change and integrate light of different wavelengths.

[0030] Specifically, this application also includes a rotation adjustment mechanism B for rotating the lens A under test. The image acquisition module 7 includes an industrial camera and a computer. The industrial camera acquires images of the corresponding focal points, and clear crosshair images are formed on the CCD sensors of each industrial camera. Finally, the software automatically analyzes the position information of the crosshair images of different industrial cameras to achieve the detection purpose. In this application, multiple light rays of different wavelengths pass through the above system and form clear crosshair images of different wavelengths on the CCD sensors of their respective industrial cameras. After the software detection program is started, the lens or lens A under test rotates 360° under the drive of the rotation adjustment mechanism B. The center of the crosshair image on the corresponding industrial camera CCD sensor will be drawn with a trajectory circle. After processing and analyzing the trajectory circles on the CCD sensors of different industrial cameras by a dedicated software algorithm, the corresponding position data of the curvature center of each lens surface corresponding to each wavelength light ray and the offset data of the curvature center of each lens surface will be obtained, and the software will automatically output and save them.

[0031] This application provides a method for detecting the center position of curvature on the surface of a multi-path reflective lens, including the following steps: S1. Based on the number of surfaces of the lens to be tested, various wavelengths of light are emitted. The various wavelengths of light pass through the crosshair target 2, enter the semi-transparent and semi-reflective prism 3, and then exit. S2. Multiple wavelengths of light emitted pass through the corresponding collimator 4 via different paths; S3. Multiple light rays passing through the multi-path collimator 4 enter the color combining prism 5 from different angles, and are integrated by the color combining prism 5 to exit onto the lens under test. S4. Adjust each collimator 4 separately so that each beam of light is focused at the center of curvature of the surface of each lens to be tested. S5. Part of the light rays from each path are reflected back to the semi-transparent and semi-reflective prism 3 along their original paths, and then pass directly through the semi-transparent and semi-reflective prism 3 and are focused onto the image acquisition module 7 to form multiple cross images of different wavelengths.

[0032] The beneficial effects of this invention are: 1. Solved the problem that the surface curvature center position detection device for reflective lenses could only detect the curvature center position of one lens surface in each detection process; 2. Solved the problem of detection efficiency in mass production applications of reflective lens surface curvature center position detection devices; 3. It solves the cost problem of requiring a large number of machines for the detection device of the curvature center position of the reflective lens surface when it is used in mass production; 4. Solved the problem of mechanical precision error caused by multiple tests; 5. The integrated system enables electronic control, making operation simple and precise; 6. The software automatically controls and analyzes images, and automatically saves and outputs detection data and results.

[0033] This invention provides a method for detecting the curvature center position of a multi-path reflective lens surface. It can simultaneously detect the curvature center positions of multiple lens surfaces, solving the problem that existing reflective lens surface curvature center position detection devices can only detect the curvature center of one lens surface at a time. This significantly improves detection efficiency and reduces customer procurement costs. Furthermore, since the detection requires a rotation method—that is, the lens or lens under test needs to rotate 360 ​​degrees, meaning the rotation adjustment mechanism rotates 360 degrees—the rotation adjustment mechanism itself has radial and axial runout accuracy errors. Therefore, each rotation inevitably introduces the accuracy error of the rotation adjustment mechanism itself. Thus, this invention's multi-path reflective lens surface curvature center position detection method can simultaneously detect the curvature center positions of multiple lens surfaces under the condition of a single rotation of the rotation adjustment mechanism, without considering the accuracy error of the rotation adjustment mechanism itself. Its detection accuracy is higher, consistency is better, and the accuracy of detection is greatly improved. Moreover, since the accuracy error of the rotation adjustment mechanism itself is not considered, the component cost will be significantly reduced.

[0034] This application uses a multi-optical-path method for detecting the center position of curvature on the surface of a reflective lens, and is not limited to a specific number of optical paths such as two or three optical paths.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A system for detecting the center position of curvature of a multi-path reflective lens surface, characterized in that: It includes at least a light source module, a crosshair target, a semi-transparent and semi-reflective prism, a multi-channel collimator, a color combining prism, several reflectors, and an image acquisition module; The light source module is used to emit light of various wavelengths according to the number of surfaces of the lens under test. The light of various wavelengths passes through the crosshair target, enters the semi-transparent and semi-reflective prism, and then exits. Light rays of different wavelengths emitted from a semi-transparent and semi-reflective prism pass through a corresponding collimator via different paths; Multiple beams of light passing through the multi-path collimator enter the color combining prism from different angles, either directly or through reflection by a mirror. The color combining prism integrates all the light bands and then exits onto the lens under test. Adjust each collimator separately so that each beam of light is focused at the center of curvature of the surface of each lens under test; Part of the light rays from each path are reflected back to the semi-transparent prism and then directly pass through the semi-transparent prism to be focused onto the image acquisition module to form an image.

2. The multi-path reflective lens surface curvature center position detection system according to claim 1, characterized in that: The light source module includes multiple sets of single light source units for emitting light of one wavelength band individually. Each set of single light source units is equipped with a crosshair target and a semi-transparent semi-reflective prism between itself and the corresponding collimator. The multiple wavelengths of light emitted by the multiple sets of single light source units pass through the corresponding crosshair target, enter the corresponding semi-transparent semi-reflective prism, and are emitted towards the corresponding collimator through different paths.

3. The multi-path reflective lens surface curvature center position detection system according to claim 1, characterized in that: The light source module includes a composite light source unit. Multiple wavelengths of light are emitted individually by the composite light source unit and then pass through a crosshair target, enter a semi-transparent and semi-reflective prism, and exit. A dichroic prism and several reflectors are set between the semi-transparent and semi-reflective prism and the multi-path collimator. Multiple wavelengths of light emitted from the semi-transparent and semi-reflective prism enter the dichroic prism and exit directly or are reflected by the reflectors to pass through the corresponding collimator through different paths.

4. The multi-path reflective lens surface curvature center position detection system according to claim 1, characterized in that: The color-combining prism is equipped with a color-combining prism adjustment mechanism for adjusting the distance between it and the mirror to be tested.

5. The multi-path reflective lens surface curvature center position detection system according to claim 1, characterized in that: The collimator is equipped with a collimator adjustment mechanism for adjusting its overall height position.

6. The multi-path reflective lens surface curvature center position detection system according to claim 1, characterized in that: The collimator has an objective lens with an objective lens adjustment mechanism for adjusting its position in the horizontal direction.

7. The multi-path reflective lens surface curvature center position detection system according to claim 1, characterized in that: The reflector is equipped with a reflector adjustment mechanism for adjusting its tilt angle.

8. The multi-path reflective lens surface curvature center position detection system according to claim 1, characterized in that: The color-combining prism is an X-Cube color-combining prism, which is coated with several layers of film to reflect light from different angles in the same direction.

9. The multi-path reflective lens surface curvature center position detection system according to claim 1, characterized in that: It also includes a rotation adjustment mechanism for rotating the lens under test.

10. A method for detecting the position of the surface curvature center of a multi-path reflective lens, characterized in that: Includes the following steps: Depending on the number of surfaces of the lens to be tested, various wavelengths of light are emitted. These wavelengths of light pass through the crosshair target, enter the semi-transparent and semi-reflective prism, and then exit. The emitted light rays of different wavelengths pass through their respective collimators via different paths; Multiple beams of light passing through the multi-path collimator enter the color combining prism from different angles, and are then combined by the color combining prism to exit onto the lens under test. Adjust each collimator separately so that each beam of light is focused at the center of curvature of the surface of each lens under test; Part of the light rays from each path are reflected back to the semi-transparent prism and then directly pass through the semi-transparent prism to be focused onto the image acquisition module to form an image.

Images