Lens thickness measuring equipment based on optical coherence tomography technology

Abstract

The utility model relates to the technical field of material detection, and discloses an optical coherence tomography technology-based lens thickness measuring device, which comprises a device main body, a tested material placing table arranged below the front end of the device main body, and a lens fixing device arranged above the front end of the device main body and matched with the tested material placing table, a sample arm and a reference arm are arranged at the top end of the equipment body, the sample arm comprises a sample arm incident light adjusting frame matched with the lens fixing device at the top end of the equipment body, and a dichroscope is arranged at one end of the sample arm incident light adjusting frame. According to the utility model, a non-contact measurement mode is adopted, namely, the OCT technology is utilized to realize non-contact measurement of the thickness of the lens, so that potential damage to the surface of a material is avoided, and micron-sized thickness measurement can be realized through the high-resolution OCT technology.

Description

Technical Field

[0001] This utility model relates to the field of materials testing technology, specifically a device for measuring the thickness of a lens based on optical coherence tomography (OCT) technology. Background Technology

[0002] In modern industrial manufacturing, especially given the demand for high-precision machining and high-quality manufacturing, lens thickness measurement has become a crucial quality control step. Lenses are not only widely used in traditional fields such as construction, automotive, and aerospace, but are also indispensable materials in high-tech products such as optical devices, electronic displays, and touchscreens. Therefore, ensuring the accuracy of lens thickness is vital to guaranteeing the performance of the final product.

[0003] Existing lens thickness measurement equipment still suffers from the following problems: Traditional lens thickness measurement methods mainly include mechanical measurement and ultrasonic measurement (such as Chinese invention patents CN218937340U and CN115540790A). Mechanical measurement methods, which rely on physical contact, are simple to operate but easily cause scratches or damage to the lens surface, and their measurement efficiency is low, making them unsuitable for high-speed production lines. Ultrasonic measurement technology utilizes the difference in the propagation speed of ultrasonic waves in different media to determine lens thickness. This method is non-contact, but it is greatly affected by material type and environmental factors, resulting in insufficient accuracy and stability. Utility Model Content

[0004] (a) Technical problems to be solved.

[0005] To address the shortcomings of existing technologies, this invention provides a lens thickness measurement device based on optical coherence tomography (OCT) technology, thus solving the problems mentioned in the background art.

[0006] (ii) Technical solution.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a lens thickness measurement device based on optical coherence tomography (OCT) technology, comprising a device body, a material placement stage for the measured material is disposed below the front end of the device body, a lens fixing device matching the material placement stage for the measured material is disposed above the front end of the device body, a sample arm and a reference arm are disposed at the top end of the device body, the sample arm includes a sample arm incident light adjustment frame matching the lens fixing device at the top end of the device body, a dichroic mirror is disposed at one end of the sample arm incident light adjustment frame, the sample arm also includes a reflector adjustment frame matching the lens fixing device at the top end of the device body, a first reflector is disposed at the front end of the reflector adjustment frame, the reference arm includes a reference arm incident light adjustment frame matching the lens fixing device at the top end of the device body, a second reflector is disposed at the upper end of the reference arm incident light adjustment frame, and the reference arm also includes an optical path control device disposed at the rear side of the top end of the device body.

[0008] As a further improvement of this utility model: an interface panel is provided at the lower rear end of the main body of the device, and multiple control interfaces are provided at the rear end of the interface panel; a display output module is provided at the upper front end of the main body of the device, and the display output module has a built-in data processing module.

[0009] As a further embodiment of this utility model: a control module is provided at the upper rear end of the main body of the device, a light source module is provided in the middle of the rear end of the main body of the device, and an optical fiber coupler module is provided at the other end of the main body of the device.

[0010] As a further embodiment of this utility model: the outer side of the main body of the device is provided with a shell mechanism, the shell mechanism includes a front shell of the main body disposed at the front end of the main body of the device, the shell mechanism also includes a rear shell of the main body disposed at the rear end of the main body of the device, a heat dissipation hole is provided above the rear end of the rear shell of the main body, and an assembly groove for assembling the interface panel is provided below the rear end of the rear shell of the main body.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. In this utility model, a non-contact measurement method is adopted, that is, OCT technology is used to achieve non-contact measurement of lens thickness, avoiding potential damage to the material surface. Through high-resolution OCT technology, micron-level thickness measurement can be achieved.

[0013] 2. Compared with traditional measurement techniques, this instrument simplifies the operation process. Users only need to place the lens sample on the sample stage to automatically complete the measurement. In addition, due to the adoption of advanced data processing algorithms, the measurement results can be obtained quickly, which greatly improves work efficiency. At the same time, it is not only suitable for the thickness measurement of flat lenses, but also suitable for curved or specially shaped lenses. Attached Figure Description

[0014] Figure 1 The overall three-dimensional structure of this utility model Figure 1 ;

[0015] Figure 2 The overall three-dimensional structure of this utility model Figure 2 ;

[0016] Figure 3 The internal structure of this utility model is three-dimensional. Figure 1 ;

[0017] Figure 4 The internal structure of this utility model is three-dimensional. Figure 2 .

[0018] In the diagram: 1. Rear casing of the device; 2. Display output module; 3. Lens fixing device; 4. Test material placement stage; 5. Control module; 6. Fiber optic coupler module; 7. Light source module; 8. Sample arm incident light adjustment frame; 9. Dichroic mirror; 10. First reflecting mirror; 11. Reflecting mirror adjustment frame; 12. Reference arm incident light adjustment frame; 13. Second reflecting mirror; 14. Optical path control device; 15. Interface panel; 16. Front casing of the device; 17. Main body of the equipment. Detailed Implementation

[0019] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0020] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figures 1-4 In this embodiment of the present invention, a lens thickness measuring device based on optical coherence tomography (OCT) technology includes a device body 17. A material placement stage 4 is disposed below the front end of the device body 17, and a lens fixing device 3 matching the material placement stage 4 is disposed above the front end of the device body 17. A sample arm and a reference arm are disposed at the top of the device body 17. The sample arm includes a sample arm incident light adjustment frame 8 at the top of the device body 17 that matches the lens fixing device 3. A dichroic mirror 9 is disposed at one end of the sample arm incident light adjustment frame 8. The sample arm also includes a matching mirror at the top of the device body 17. The mirror fixing device 3 has a mirror adjustment frame 11 with a first mirror 10 at its front end. The reference arm includes a reference arm incident light adjustment frame 12 that matches the top of the device body 17. A second mirror 13 is provided at the upper end of the reference arm incident light adjustment frame 12. The reference arm also includes an optical path control device 14 located at the rear of the top of the device body 17. The detection module includes an optical interference structure, which includes a sample arm and a reference arm. It can interfere the light beam reflected by the sample with the reference beam to obtain high-precision position information of different surfaces of the lens.

[0023] An interface panel 15 is located at the lower rear end of the main body 17 of the device. Multiple control interfaces are located at the rear end of the interface panel 15, through which the main body 17 of the device can be wired. A display output module 2 is located at the upper front end of the main body 17 of the device. The display output module 2 has a built-in data processing module. The data processing module mainly converts the interference position information into the thickness parameters of the sample, and the display output module 2 provides data feedback through its display screen.

[0024] A control module 5 is located at the upper rear end of the main body 17, and a light source module 7 is located in the middle of the rear end of the main body 17. The light source module 7 adopts a broadband light source with adjustable power output. A fiber optic coupler module 6 is located at the other end of the main body 17.

[0025] The outer side of the main body 17 of the equipment is provided with a shell mechanism, which includes a front shell 16 of the main body 17 located at the front end of the main body 17, and a rear shell 1 of the main body 17 located at the rear end of the main body 17. A heat dissipation hole is provided above the rear end of the rear shell 1, and an assembly slot for assembling the interface panel 15 is provided below the rear end of the rear shell 1.

[0026] The working principle of this utility model is as follows: the whole includes a light source module 7, a control module 5, a detection module, a data processing module and a display output module 2. The light source module 7 is used to emit a light beam, the control module 5 controls the normal operation of the control and detection system, the detection module is used to receive the light beam reflected back by the lens under test and the reference arm, the data processing module calculates the thickness of the lens according to the received interference beam, and the display output module 2 displays the measurement results.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lens thickness measuring device based on optical coherence tomography technology, comprising a device body (17), wherein a housing mechanism is provided on the outside of the device body (17); Its features are: The device body (17) has a test material placement platform (4) below the front end and a lens fixing device (3) matching the test material placement platform (4) above the front end. The top of the device body (17) is equipped with a sample arm and a reference arm. The sample arm includes a sample arm incident light adjustment frame (8) of the matching lens fixing device (3) at the top of the device body (17). A dichroic mirror (9) is provided at one end of the sample arm incident light adjustment frame (8). The sample arm also includes a reflector adjustment frame (11) of the matching lens fixing device (3) at the top of the device body (17). A first reflector (10) is provided at the front end of the reflector adjustment frame (11). The reference arm includes a reference arm incident light adjustment frame (12) that matches the lens fixing device (3) at the top of the device body (17). A second reflector (13) is provided at the upper end of the reference arm incident light adjustment frame (12). The reference arm also includes an optical path control device (14) located at the rear side of the top of the device body (17).

2. The lens thickness measuring device based on optical coherence tomography (OCT) technology according to claim 1, characterized in that: An interface panel (15) is provided at the lower rear end of the main body (17) of the device, and multiple control interfaces are provided at the rear end of the interface panel (15).

3. The lens thickness measuring device based on optical coherence tomography (OCT) technology according to claim 1, characterized in that: The device body (17) has a display output module (2) located on the front top, and the display output module (2) has a built-in data processing module.

4. The lens thickness measuring device based on optical coherence tomography (OCT) technology according to claim 1, characterized in that: A control module (5) is provided above the rear end of the main body of the device (17).

5. The lens thickness measuring device based on optical coherence tomography (OCT) technology according to claim 1, characterized in that: A light source module (7) is provided at the middle of the rear end of the main body (17) of the device.

6. The lens thickness measuring device based on optical coherence tomography (OCT) technology according to claim 1, characterized in that: The other end of the main body of the device (17) is provided with an optical fiber coupler module (6).

7. The lens thickness measuring device based on optical coherence tomography (OCT) technology according to claim 1, characterized in that: The housing mechanism includes a front housing (16) disposed at the front end of the main body (17) of the device, and a rear housing (1) disposed at the rear end of the main body (17). A heat dissipation hole is provided above the rear end of the rear housing (1), and an assembly slot for assembling the interface panel (15) is provided below the rear end of the rear housing (1).

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