Spectacle frame body contour detection device

Abstract

The utility model discloses a glasses frame body contour detection device, which is characterized in that the glasses frame body contour detection device comprises a probe, an OCT light source, an optical fiber coupler and a reference arm, the OCT light source is connected with the optical fiber coupler, the optical fiber coupler is respectively connected with the probe and the reference arm through optical fibers, and the probe performs two-dimensional movement on a plane parallel to a glasses frame along a preset track route; the probe comprises a scanning part and a driving part, the scanning part is directly connected with the driving part, and the driving part is used for driving the scanning part to perform one-dimensional rotation along a rotating shaft connected with the two parts. Three-dimensional scanning can be realized by combining two-dimensional movement of the probe and one-dimensional rotation of the scanning component, so that detailed three-dimensional shape contour data of the inner groove of the glasses frame can be accurately obtained, the edge cutting process of the glasses lens can be more accurately assisted and guided, and the glasses lens and the inner groove of the glasses frame are more fitted and matched in assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial detection, in particular to a device for detecting the contour of a glasses frame. Background Art

[0002] Existing eyeglass frame edge detection devices can often only obtain the contour curve of the inner groove of the eyeglass frame. This contour curve can only characterize the contour direction of the eyeglass frame edge, and cannot obtain the detailed three-dimensional morphological contour data of the inner groove of the eyeglass frame. For example, when the cross-section of the inner groove of the eyeglass frame is a V-shaped structure (or a C-shaped inner groove structure), the existing eyeglass frame edge detection device can only obtain the contour trajectory of the vertices of the V-shaped structure of the inner groove of the eyeglass frame, and cannot obtain the V-shaped cross-sectional characteristics of the entire V-shaped groove, that is, it cannot obtain the three-dimensional morphological contour data of the V-shaped groove.

[0003] After the existing eyeglass frame edge detection device guides the cutting of the lens, the lens assembler often needs to repeatedly compare the matching degree between the edge of the lens and the inner groove of the frame when installing the lens into the corresponding eyeglass frame. However, it is often necessary to manually use an edge grinder to grind the edge of the corresponding lens according to the shape of the inner groove of the frame so that the lens can be better installed in the frame. However, this manual judgment of the matching degree between the lens and the inner groove of the frame, and the manual use of an edge grinder to grind the edge of the lens, these two processes often test the experience and patience of the lens assembler. This also causes this process to be time-consuming, which is not conducive to saving labor costs.

[0004] Optical coherence tomography (OCT) is an emerging optical imaging technology with the advantages of high resolution, fast imaging speed, no radiation damage, moderate price, and compact structure. It is an important potential tool in the field of industrial and medical detection. Among them, the swept frequency OCT system can achieve a larger detection depth and a faster rate, but its cost is relatively high; while the time domain OCT system has a deep detection depth but a slow sampling speed. The frequency domain OCT system has a cost between the time domain and swept frequency OCT systems, and can achieve high-speed scanning, but the detection depth is limited.

[0005] When the detection depth of the OCT system is deep, such as a deep-depth swept-frequency OCT system, the detection depth of the OCT system is greater than the distance change from the eyeglass frame to the main optical axis. At this time, the probe only needs to rotate around the main optical axis to achieve OCT detection of the eyeglass frame contour.

[0006] However, the shapes of currently used eyeglass frames vary greatly. This requires the OCT system to have a deeper detection depth, which will be more expensive. For example, only a swept frequency OCT system can be used. If a time-domain OCT system is used, if the above detection depth is achieved, the corresponding time-domain OCT image acquisition speed is often slow. Therefore, it is necessary to balance the contradiction between the cost of the OCT system, the sampling speed and the detection depth, and use OCT technology to obtain detailed three-dimensional morphological contour data of the inner groove of the eyeglass frame for different eyeglass frame shapes. Utility Model Content

[0007] The utility model aims to solve the technical problems of improving the efficiency and success rate of the eyeglass lens edge cutting process and improving the eyeglass lens edge cutting quality, and proposes an eyeglass frame contour detection device.

[0008] The technical problem of the utility model is solved by the following technical solutions:

[0009] A device for detecting the contour of an eyeglass frame, comprising a probe, an OCT light source, a fiber coupler and a reference arm, wherein the OCT light source is connected to the fiber coupler, and the fiber coupler is respectively connected to the probe and the reference arm through optical fibers, and the probe moves two-dimensionally on a plane parallel to the eyeglass frame along a preset trajectory route;

[0010] The probe comprises a scanning component and a driving component. The scanning component is directly connected to the driving component. The driving component is used to drive the scanning component to perform one-dimensional rotation along a rotation axis connecting the scanning component and the driving component.

[0011] In some embodiments, the probe further includes a fiber collimator, and the fiber collimator is disposed between the scanning component and the fiber coupler.

[0012] In some embodiments, the probe further includes an objective lens and a reflector, wherein the objective lens is disposed between the scanning component and the reflector, and the light output by the OCT light source enters the probe and the reference arm respectively through the fiber optic coupler, and then returns from the probe and the reference arm to the fiber optic coupler and interferes, and the light entering the probe through the fiber optic coupler passes through the fiber optic collimator, is reflected by the scanning component, passes through the objective lens, is reflected by the reflector, and finally enters the eyeglass frame, and the light reflected and scattered by the eyeglass frame returns to the fiber optic coupler through the probe.

[0013] In some embodiments, the preset trajectory route is determined according to the shape of the glasses frame so that the change in the distance from each point on the glasses frame to the main optical axis is reduced and is within the detection depth range.

[0014] In some embodiments, the scanning component collects multiple OCT images of the eyeglass frame through one-dimensional rotation, and the probe obtains multiple cross-sections of the inner groove of the eyeglass frame through two-dimensional translation or rotation, thereby obtaining three-dimensional morphological contour data of the inner groove of the eyeglass frame.

[0015] In some embodiments, the probe is mounted on a two-dimensional moving platform.

[0016] In some embodiments, a detector is further included, wherein the detector is connected to the optical fiber coupler and is used to collect interference light data in the optical fiber coupler.

[0017] In some embodiments, a data processing unit is further included, wherein the data processing unit is connected to the detector and is used to process the interference light data collected by the detector.

[0018] In some embodiments, a display screen is further included, and the display screen is connected to the data processing unit and is used to display the OCT image of the tested eyeglass frame.

[0019] The beneficial effects of the utility model compared with the prior art include:

[0020] The utility model proposes a device for detecting the contour of an eyeglass frame, wherein the probe is moved two-dimensionally along a preset trajectory on a plane parallel to the eyeglass frame, and at the same time a driving component in the probe drives a scanning component to rotate one-dimensionally. Combining the two-dimensional movement of the probe and the one-dimensional rotation of the scanning component, three-dimensional scanning can be achieved, thereby accurately obtaining detailed three-dimensional morphological contour data of the inner groove of the eyeglass frame, and more accurately assisting and guiding the edging process of the eyeglass lens, so that the assembly of the eyeglass lens and the inner groove of the eyeglass frame is more fitted and matched.

[0021] In some embodiments, the preset trajectory route can be determined according to the shape of the eyeglass frame so that the change in the distance from each point on the eyeglass frame to the main optical axis is reduced and is within the detection depth range, thereby enabling OCT scanning detection of eyeglass frames of various shapes.

[0022] In some embodiments, the scanning component collects multiple OCT images of the eyeglass frame through one-dimensional rotation, and the probe obtains multiple cross-sections of the inner groove of the eyeglass frame through two-dimensional translation or rotation, thereby obtaining more detailed three-dimensional morphological contour data of the inner groove of the eyeglass frame.

[0023] Other beneficial effects of the embodiments of the present invention will be further described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a device for detecting the contour of a glasses frame according to an embodiment of the utility model;

[0025] Figure 2This is a schematic diagram of the working of the eyeglass frame contour detection device of the embodiment of the utility model;

[0026] Figure 3 It is a schematic diagram of the structure of the eyeglass frame;

[0027] Figure 4 It is a preset trajectory diagram of the first shape eyeglass frame of the embodiment of the utility model;

[0028] Figure 5 This is a preset trajectory diagram of the second shape eyeglass frame of the embodiment of the utility model.

[0029] The reference numerals are as follows:

[0030] 101-OCT light source, 102-fiber coupler, 103-reference arm, 104-detector, 105-computer, 20-probe, 201-fiber collimator, 202-scanning component, 203-objective lens, 204-reflector, 205-driving component, 90-glasses, 901-contour curve of the inner groove of the glasses frame, 900-section of the inner groove of the glasses frame. DETAILED DESCRIPTION

[0031] The present invention is further described below with reference to the accompanying drawings and in combination with preferred embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0032] It should be noted that the directional terms such as left, right, up, down, top, and bottom in this embodiment are merely relative concepts or are based on the normal use status of the product, and should not be considered as restrictive.

[0033] An embodiment of the utility model shows a device for detecting the contour of an eyeglass frame, which utilizes a translation mechanism to realize the translation of an OCT system probe along a certain trajectory, and utilizes the OCT system to perform tomographic scanning imaging, and combines the obtained OCT image and the running trajectory of the translation mechanism to calculate the three-dimensional morphological contour data of the inner groove of the eyeglass frame.

[0034] Example:

[0035] like Figure 1 As shown, the eyeglass frame contour detection device of this embodiment includes a probe 20 、OCT light source 101, fiber coupler 102 and reference arm 103, OCT light source 101 is connected to fiber coupler 102, fiber coupler 102 is respectively connected to probe 20 and reference arm 103 through optical fiber, probe 20 moves two-dimensionally (translationally or rotationally) on a plane parallel to the eyeglass frame along a preset trajectory. Probe 20 includes scanning component 202 and driving component 205, scanning component 202 is directly connected to driving component 205, driving component 205 is used to drive scanning component 202 to rotate around the rotation axis connecting the two, and perform one-dimensional scanning.

[0036] The working principle of the eyeglass frame contour detection device of this embodiment is as follows: through the OCT imaging system, multiple cross sections 900 of the inner grooves of the eyeglass frame can be obtained, and then the three-dimensional morphological contour data of the inner grooves of the eyeglass frame can be obtained. The light output by the OCT light source 101 provides light to the probe 20 and the reference arm 103 through the fiber coupler 102. The reference arm 103 has a known length and can return light to the fiber coupler 102. The probe 20 provides measurement light to the sample under test (eyeglass frame), and the light scattered back from the sample returns along the original path and interferes with the return light of the reference arm 103 in the fiber coupler 102. The interference light is detected by the detector 104, and then processed by the computer 105, and finally the OCT image of the sample under test is displayed.

[0037] The probe further includes a fiber collimator 201 , an objective lens 203 and a reflector 204 . The fiber collimator 201 is disposed between the scanning component 202 and the fiber coupler 102 , and the objective lens 203 is disposed between the scanning component 202 and the reflector 204 .

[0038] When OCT imaging is performed, measurement light is provided to the probe 20 via the fiber coupler 102. The measurement light passes through the fiber collimator 201, is reflected by the scanning component 202, passes through the objective lens 203, is reflected by the reflector 204, and finally enters the sample. The sample reflects and scatters the measurement light, which returns to the fiber coupler 102 via the probe 20.

[0039] By mounting the probe 20 on a two-dimensional mobile platform, high-precision electric or pneumatic two-dimensional translation can be achieved. Driven by the driving component 205, the scanning component 202 performs one-dimensional scanning on the sample to be tested, so that the OCT system can obtain multiple tomographic OCT images of the sample to be tested. At any time, when the probe 20 is stationary, the scanning component 202 rotates to achieve one-dimensional scanning and obtain an OCT image. The probe 20 translates or rotates along a preset trajectory route for two-dimensional scanning, and obtains multiple cross-sections 900 of the inner grooves of the eyeglass frame.

[0040] like Figure 2 As shown, when the eyeglass frame contour detection device is working, the probe 20 is inserted into the eyeglass frame to perform OCT tomography sampling.

[0041] like Figure 3 The structure of the glasses frame of glasses 90 is shown, and a contour curve 901 of an inner groove of the glasses frame and a cross section 900 of the inner groove of the glasses frame at a point on the contour curve of the inner groove of the glasses frame are shown.

[0042] like Figure 4 and Figure 5 As shown, for different shapes of eyeglass frames, the probe 20 is moved horizontally or rotated along a preset trajectory route L201 (or L202 / L203), and the preset trajectory route is determined according to different shapes of eyeglass frames. At this time, the change in the distance from each point on the eyeglass frame to the main optical axis L2 can be reduced and is within the detection depth range of the OCT system. That is, for different eyeglass frames, a specific preset trajectory route is selected for translation or rotation, and OCT scanning detection of various eyeglass frames can be achieved.

[0043] After the eyeglass frame contour detection device collects multiple OCT tomography images of the entire eyeglass frame, it can synthesize the three-dimensional shape contour data of the inner groove of the eyeglass frame in combination with the known preset trajectory route. According to the three-dimensional shape contour data of the inner groove of the eyeglass frame, the eyeglass lens edge cutting process can be more accurately assisted and guided, so that the assembly of the eyeglass lens and the inner groove of the eyeglass frame is more fitted and matched, thereby improving the efficiency and success rate of the eyeglass lens edge cutting process, improving the quality of the eyeglass lens edge cutting, and avoiding many process problems such as lens assembly deformation due to inaccurate edge cutting.

[0044] The embodiment of the utility model uses OCT technology to obtain detailed three-dimensional morphological profile data of the inner groove of the eyeglass frame, which is used to assist and guide the eyeglass lens edge cutting process, so that the eyeglass lens after edge cutting fits the inner groove of the eyeglass frame better, improves the eyeglass lens assembly quality and assembly efficiency, thereby saving labor costs and reducing the price of glasses.

[0045] The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, several equivalent substitutions or obvious variations can be made, and the performance or use is the same, which should be regarded as belonging to the protection scope of the utility model. In the description of this specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the absence of mutual contradiction, technicians in this field can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the utility model and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope of protection of the patent application.

Claims

1. A device for detecting the contour of an eyeglass frame, characterized in that: Including probe 、 An OCT light source, a fiber coupler and a reference arm, wherein the OCT light source is connected to the fiber coupler, and the fiber coupler is respectively connected to the probe and the reference arm through optical fibers, and the probe moves two-dimensionally along a preset trajectory on a plane parallel to the eyeglass frame; The probe comprises a scanning component and a driving component. The scanning component is directly connected to the driving component. The driving component is used to drive the scanning component to perform one-dimensional rotation along a rotation axis connecting the scanning component and the driving component.

2. The eyeglass frame contour detection device according to claim 1, characterized in that: The probe further comprises a fiber collimator, which is arranged between the scanning component and the fiber coupler.

3. The eyeglass frame contour detection device according to claim 2, characterized in that: The probe also includes an objective lens and a reflector. The objective lens is arranged between the scanning component and the reflector. The light output by the OCT light source enters the probe and the reference arm respectively through the optical fiber coupler, and then returns from the probe and the reference arm to the optical fiber coupler and interferes. The light entering the probe through the optical fiber coupler passes through the optical fiber collimator, is reflected by the scanning component, passes through the objective lens, is reflected by the reflector, and finally enters the eyeglass frame. The light reflected and scattered by the eyeglass frame returns to the optical fiber coupler through the probe.

4. The eyeglass frame contour detection device according to claim 1, characterized in that: The preset trajectory route is determined according to the shape of the glasses frame so that the change in the distance from each point on the glasses frame to the main optical axis is reduced and is within the detection depth range.

5. The eyeglass frame contour detection device according to claim 1, characterized in that: The scanning component collects multiple OCT images of the eyeglass frame through one-dimensional rotation, and the probe obtains multiple cross-sections of the inner grooves of the eyeglass frame through two-dimensional translation or rotation, thereby obtaining three-dimensional morphological contour data of the inner grooves of the eyeglass frame.

6. The eyeglass frame contour detection device according to claim 1, characterized in that: The probe is installed on a two-dimensional moving platform.

7. The eyeglass frame contour detection device according to claim 1, characterized in that: The invention also comprises a detector, which is connected to the optical fiber coupler and is used for collecting interference light data in the optical fiber coupler.

8. The eyeglass frame contour detection device according to claim 7, characterized in that: It also includes a data processing unit, which is connected to the detector and is used to process the interference light data collected by the detector.

9. The eyeglass frame contour detection device according to claim 8, characterized in that: It also includes a display screen, which is connected to the data processing unit and is used to display the OCT image of the tested eyeglass frame.

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