An automatic measuring instrument for eyeglass fitting

Abstract

This utility model discloses an automatic measuring instrument for eyeglass fitting, including a base, a lifting column mounted on the base, an operating screen mounted on the lifting column, a data acquisition device mounted above the operating screen, and a central controller located within the operating screen. The central controller is signal-connected to the data acquisition device, the operating screen, and the lifting column. The operating screen and the data acquisition device move up and down with the lifting column. A subject position area is provided facing the operating screen. The data acquisition device includes a mounting base and a camera component mounted on the mounting base. The operating screen has a front display area, a left display area, a right display area, and a front / back position adjustment display area. The front display area includes a front facial contour area and a frame contour area within the front facial contour area. The front / back position adjustment display area is used to indicate the front / back direction required for the subject's adjustment. This device uses the camera component to identify and acquire facial data from the subject in three directions, thereby automatically generating eyeglass fitting parameters.

Description

Technical Field

[0001] This utility model relates to an automatic measuring instrument for eyeglass fitting, belonging to the technical field of eyeglass fitting measurement. Background Technology

[0002] Traditional eyeglass fitting parameter measurement devices typically rely on manual operation or fixed optical equipment to measure parameters such as pupillary distance and pupillary height. In existing technologies, operators need to use specialized tools, such as pupillary distance rulers or PD rulers, to manually measure close to the subject's face, or rely on a single camera with a fixed ruler for image analysis. These methods have significant drawbacks: First, manual measurement is easily affected by the operator's experience and the subject's cooperation; misalignment of the subject's gaze or improper head posture can lead to measurement errors. Second, using camera devices at fixed heights or angles is difficult to adapt to subjects with different heights and facial features, requiring repeated manual adjustments to the device position, resulting in low measurement efficiency. Third, existing automated equipment lacks a real-time interactive guidance mechanism; subjects cannot adjust their posture through intuitive feedback, and issues such as head tilt or frame misalignment can affect parameter capture accuracy. Furthermore, existing technologies rely heavily on preset calibration or manual marking to identify the position of the bridge and frame height, failing to synchronously correct for positional deviations between the frame and face during dynamic adjustments, leading to systematic errors between the final parameters and the actual wearing condition.

[0003] To address the aforementioned issues, existing technical solutions still suffer from bottlenecks such as poor equipment adaptability, cumbersome operation procedures, and reliance on manual intervention for measurement results. There is an urgent need for a measurement device that can achieve automatic adaptation, real-time guided interaction, and reduce human error. Summary of the Invention

[0004] Purpose of the invention: To solve the above-mentioned technical problems, this utility model provides an automatic measuring instrument for eyeglass fitting. The device uses a camera component to identify and collect facial data of the subject from three directions, and then automatically generates eyeglass fitting parameters.

[0005] Technical Solution: An automatic measuring instrument for eyeglass fitting includes a base, a lifting column mounted on the base, an operating screen mounted on the lifting column, a data acquisition device mounted above the operating screen, and a central controller located within the operating screen. The central controller is signal-connected to the data acquisition device, the operating screen, and the lifting column. The operating screen and the data acquisition device move up and down with the lifting column. A subject position area is provided facing the operating screen. The data acquisition device includes a mounting base and a camera assembly mounted on the mounting base. The operating screen has a frontal display area, a left-side display area, a right-side display area, and a front-to-back position adjustment display area. The frontal display area includes a frontal facial contour area and a frame contour area within the frontal facial contour area. The front-to-back position adjustment display area is used to indicate the frontal / backward direction required for the subject's adjustment. The camera assembly captures frontal, left-side, and right-side views of the subject and displays them respectively in the frontal, left-side, and right-side display areas on the operating screen.

[0006] This invention uses a camera component to identify and collect facial data from three directions of the test subject, thereby automatically generating prescription lens parameters. During the test, the test subject needs to arrive at the designated area. After the test is started, if the lifting column is in its initial low position, the central controller controls the lifting column to rise until the camera component captures the test subject's face. If the lifting column is not in its initial low position, the central controller controls the lifting column to descend first, capturing the test subject's face during the descent. If captured, the lifting stops; if not captured, after descending to the initial low position, the lifting column is controlled to rise until the camera component captures the test subject's face. After capturing the face, the test subject makes slight adjustments to their posture left and right according to the facial position displayed on the operation screen, so that the face is in the facial contour area and the lens frame is in the lens frame contour area. Fine adjustments are made according to the adjustment direction indicated by the front and back position adjustment display area. After the adjustment is completed and the front and back position adjustment display area indicates that the posture is correct, the camera component automatically takes a picture, and the central controller processes the information to obtain the prescription lens parameters. It can adapt to subjects with different heights and facial features, eliminates the need for repeated manual adjustment of the device position, has high measurement efficiency and a simple measurement method, and allows subjects to intuitively adjust their posture to improve measurement accuracy.

[0007] Preferably, to capture images of the subject's frontal, left, and right facial features, the camera assembly includes a first camera unit, a second camera unit, and a third camera unit. The first camera unit is positioned in the center of the mounting base, directly facing the subject's face. The second and third camera units are symmetrically positioned along the inner sides of both ends of the mounting base, aligned with the first camera unit. The second and third camera units are parallel to the temples of the eyeglasses worn by the subject. During testing, the subject must maintain a direct gaze towards the first camera unit.

[0008] In a preferred embodiment, in order to enable the mounting base to match the curvature of the face and the frame while also being aesthetically pleasing, the mounting base has an arc-shaped structure in the vertical projection plane.

[0009] In a preferred embodiment, to improve the clarity of the image and the accuracy of the measurement, supplementary lights are also included, which are symmetrically arranged on the inner sides of both ends of the mounting base along the first camera unit.

[0010] In a preferred embodiment, to adjust for large relative deviations between the camera and the horizontal position of the human eye, the operation screen is also equipped with a manual height adjustment button.

[0011] Adjust the position of the facial contour area using the height adjustment manual button, so that the face is within the facial contour area and the glasses frame is within the glasses frame contour area. At the same time, the display area for adjusting the front and back position indicates that the posture is correct and the camera will automatically take a picture.

[0012] In a preferred embodiment, to improve measurement accuracy, the front display area, left display area, and right display area on the operation screen each include a position calibration adjustment area. The position calibration adjustment area of ​​the front display area includes a frame front position adjustment area, an iris position adjustment area, and a center beam position adjustment area. The position calibration adjustment areas of the left display area and the right display area each include a frame side position adjustment area, a temple position adjustment area, and a lens-to-eye distance adjustment area. The center beam position adjustment area changes accordingly with the adjustment of the frame front position adjustment area.

[0013] After automatic shooting is completed, the position calibration adjustment area will be displayed on the operation screen. The measurement deviation can be eliminated and the measurement accuracy improved by manually adjusting the frame front position adjustment area, iris position adjustment area, frame side position adjustment area, temple position adjustment area, and lens-to-eye distance adjustment area. After the position calibration adjustment is completed, the central controller processes the information to obtain the lens fitting parameters.

[0014] Preferably, to adjust the brightness of the supplementary light, a sensor for collecting ambient light data is provided above the mounting base, and the sensor is connected to the central controller. After collecting the ambient light data, the sensor sends it to the central controller to adjust the brightness of the supplementary light.

[0015] Preferably, in order to display the lens fitting parameters after the test is completed, the operation screen also has a lens fitting result display area.

[0016] Beneficial effects: This utility model captures parameters of the subject's frontal, left, and right facial features using a camera unit, sends them to a central controller for processing, and automatically generates prescription lens parameters. The real-time images captured by the subject are displayed on the operation screen, helping the subject adjust their posture based on the images. After shooting, a positional calibration adjustment area can be set to adjust the deviation of the captured area according to the actual situation. This adapts to subjects with different heights and facial features, eliminating the need for repeated manual adjustments to the device position. The measurement efficiency is high and the method is simple, allowing the subject to intuitively adjust their posture and improving measurement accuracy. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a structural diagram of the overall test of this utility model;

[0019] Figure 2 This is a schematic diagram of the human face view captured by this utility model;

[0020] Figure 3 This is a schematic diagram of the position calibration and adjustment area of ​​this utility model;

[0021] Figure 4 This is a main schematic diagram of the position calibration and adjustment area of ​​this utility model;

[0022] Figure 5 This is a left schematic diagram of the position calibration and adjustment area of ​​this utility model;

[0023] Figure 6 This is a right-hand schematic diagram of the position calibration and adjustment area of ​​this utility model. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "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.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] like Figures 1-6 As shown, an automatic measuring instrument for eyeglass fitting includes a base 1, a lifting column 2 mounted on the base 1, an operating screen 3 mounted on the lifting column 2, a data acquisition device 4 positioned above the operating screen 3, and a central controller located within the operating screen 3. The central controller is signal-connected to the data acquisition device 4, the operating screen 3, and the lifting column 2. The operating screen 3 and the data acquisition device 4 move up and down as the lifting column 2 moves. A subject position area 5 is provided directly opposite the operating screen 3. The data acquisition device 4 includes a mounting base 41 and a camera assembly 42 mounted on the mounting base 41. The operating screen 3 is provided with a front display area 31, a left display area 32, a right display area 33, and a front-to-back position adjustment display area 34. The front display area 31 includes a front facial contour area 311 and a mirror frame contour area 312 set in the front facial contour area 311. The front-to-back position adjustment display area 34 is used to prompt the subject to adjust the front-to-back direction. The camera component 42 captures the subject's front, left, and right views respectively and displays them on the operating screen 3 in the front display area 31, left display area 32, and right display area 33 respectively.

[0028] The camera component 42 identifies and collects facial data from three directions of the test subject, and then automatically generates the lens fitting parameters. During the test, the test subject needs to reach the test subject position area 5. After the test is started, if the lifting column 2 is in the initial low position, the central controller controls the lifting column 2 to rise until the camera component 42 captures the test subject's face and stops. If the lifting column 2 is not in the initial low position, the central controller controls the lifting column 2 to descend first, and capture the test subject's face during the descent. If captured, the lifting stops. If not captured, after descending to the initial low position, the lifting column 2 is controlled to rise until the camera component 42 captures the test subject's face and stops. After the face is captured, the test subject makes slight adjustments to the posture left and right according to the face position displayed on the operation screen 3, so that the face position is in the facial contour area and the lens frame is in the lens frame contour area 312. The subject makes slight adjustments according to the adjustment direction prompted by the front and back position adjustment display area 34. After the adjustment is completed and the front and back position adjustment display area 34 indicates that the posture is correct, the camera component 42 automatically takes a picture, and the central controller processes the information to obtain the lens fitting parameters. It can adapt to subjects with different heights and facial features, eliminates the need for repeated manual adjustment of the device position, has high measurement efficiency and a simple measurement method, and allows subjects to intuitively adjust their posture to improve measurement accuracy.

[0029] To capture images of the subject's frontal, left, and right facial features, the camera assembly 42 includes a first camera unit 421, a second camera unit 422, and a third camera unit 423. The first camera unit 421 is positioned in the center of the mounting base 41, directly facing the subject's face. The second and third camera units 422 and 423 are symmetrically arranged along the inner sides of both ends of the mounting base 41, with the second and third camera units 422 and 423 parallel to the temples of the eyeglasses worn by the subject. During the test, the subject must maintain a direct gaze towards the first camera unit 421.

[0030] In order to make the mounting base 41 match the curvature of the face and the frame, and at the same time be aesthetically pleasing, the mounting base 41 is an arc-shaped structure in the vertical projection plane.

[0031] To improve the clarity of the images and the accuracy of the measurements, supplementary lights 6 are also included, which are symmetrically arranged on the inner sides of both ends of the mounting base 41 along the first camera unit 421.

[0032] In order to adjust the large relative deviation between the horizontal position of the camera and the human eye, the operation screen 3 is also equipped with a manual height adjustment button 35.

[0033] Adjust the position of the facial contour area by manually adjusting the height using button 35, so that the face is within the facial contour area and the glasses frame is within the glasses frame contour area 312. At the same time, the display area 34 indicates that the posture is correct and the camera will automatically take a picture.

[0034] To improve measurement accuracy, the operation screen 3 includes a position calibration adjustment area in the front display area 31, the left display area 32, and the right display area 33. The position calibration adjustment area in the front display area 31 includes a frame front position adjustment area 313, an iris position adjustment area 314, and a center beam position adjustment area 315. The position calibration adjustment areas in the left display area 32 and the right display area 33 include a frame side position adjustment area 7, a temple position adjustment area 8, and a lens-to-eye distance adjustment area 9, respectively. The center beam position adjustment area 315 changes with the adjustment of the frame front position adjustment area 313.

[0035] After automatic shooting is completed, the position calibration adjustment area will be displayed on the operation screen 3. The frame front position adjustment area 313, iris position adjustment area 314, frame side position adjustment area 7, temple position adjustment area 8, and lens-to-eye distance adjustment area 9 can be manually adjusted to eliminate measurement deviations and improve measurement accuracy. After the position calibration adjustment is completed, the central controller processes the information to obtain the lens fitting parameters.

[0036] In this embodiment, the distance pupillary distance, pupillary height, pupillary center-to-rim distance, and lens frame width and height of the subject can be obtained by adjusting the position of the front display area 31. The forward tilt angle, interpupillary distance, and body-to-leg angle of the subject are comprehensively obtained by adjusting the position of the left display area 32 and the right display area 33. The facial curvature is obtained through a face recognition algorithm based on the front display area 31, left display area 32, and right display area 33. In this embodiment, dynamic tracking and hardware closed-loop linkage ensure that the binocular camera is always in the optimal measurement position, improving parameter consistency. The semantic segmentation algorithm works in conjunction with the camera unit to directly establish a millimeter-level measurement reference coordinate system in the two-dimensional image space. The fully automated design reduces the measurement time to less than 10 seconds, and the results highly match those measured manually by professional optometrists, reducing the need for repetitive operations. The system's adaptability to complex scenarios such as reflective lenses and side-face data is significantly enhanced, providing an efficient and accurate intelligent solution for customized eyeglasses. The dynamic tracking closed-loop control uses a face recognition algorithm to obtain pupil coordinates, calculates the average coordinates, and then controls the height of the lifting column 2 to ensure the camera unit is in the optimal shooting position. A deep learning algorithm uses semantic segmentation technology to locate the pupil, frame, and temple areas: the pupil center is calculated using the circumscribed rectangle, the frame angle is extracted using linear fitting, and the temple feature lines are combined with depth data to achieve sub-pixel-level segmentation.

[0037] To adjust the brightness of the supplementary light 6, a sensor 10 for collecting ambient light data is provided above the mounting base 41. The sensor 10 is connected to the central controller. After collecting the ambient light data, the sensor 10 sends it to the central controller to adjust the brightness of the supplementary light 6.

[0038] In order to display the lens fitting parameters after the test is completed, the operation screen 3 is also provided with a lens fitting result display area 11.

[0039] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic measuring instrument for use in fitting eyeglasses, characterized in that: The system includes a base (1), a lifting column (2) mounted on the base (1), an operation screen (3) mounted on the lifting column (2), a data acquisition device (4) mounted above the operation screen (3), and a central controller located inside the operation screen (3). The central controller is connected to the data acquisition device (4), the operation screen (3), and the lifting column (2). The operation screen (3) and the data acquisition device (4) move up and down as the lifting column (2) moves. A subject position area (5) is provided directly opposite the operation screen (3). The data acquisition device (4) includes a mounting base (41) and a camera assembly (42) mounted on the mounting base (41). The operation screen... (3) It is provided with a front display area (31), a left display area (32), a right display area (33), and a front-to-back position adjustment display area (34). The front display area (31) includes a front facial contour area (311) and a frame contour area (312) set in the front facial contour area (311). The front-to-back position adjustment display area (34) is used to prompt the subject to adjust the front-to-back direction. The camera component (42) takes pictures of the subject's front, left, and right views and displays them on the operation screen (3) in the front display area (31), left display area (32), and right display area (33).

2. An automatic measuring instrument for ophthalmic lenses according to claim 1, characterized in that: The camera assembly (42) includes a first camera unit (421), a second camera unit (422), and a third camera unit (423). The first camera unit (421) is located in the middle of the mounting base (41) facing the face of the subject. The second camera unit (422) and the third camera unit (423) are symmetrically arranged on the inner sides of both ends of the mounting base (41) along the first camera unit (421). The second camera unit (422) and the third camera unit (423) are parallel to the temples of the glasses worn by the subject.

3. An automatic measuring instrument for ophthalmic lenses according to claim 2, characterized in that: In the vertical projection plane, the mounting base (41) has an arc-shaped structure.

4. An automatic measuring instrument for ophthalmic lenses according to claim 2, characterized in that: It also includes fill lights (6) symmetrically arranged on the inner sides of both ends of the mounting base (41) along the first camera unit (421).

5. The automatic measuring instrument for ophthalmic lenses according to claim 1, characterized in that: The operation screen (3) is also equipped with a manual height adjustment button (35).

6. The automatic measuring instrument for eyeglass fitting according to claim 1, characterized in that: The operation screen (3) includes a position calibration adjustment area in the front display area (31), the left display area (32), and the right display area (33). The position calibration adjustment area of ​​the front display area (31) includes a frame front position adjustment area (313), an iris position adjustment area (314), and a center beam position adjustment area (315). The position calibration adjustment areas of the left display area (32) and the right display area (33) include a frame side position adjustment area (7), a temple position adjustment area (8), and a lens-to-eye distance adjustment area (9). The center beam position adjustment area (315) changes with the adjustment of the frame front position adjustment area (313).

7. The automatic measuring instrument for eyeglass fitting according to claim 1, characterized in that: A sensor (10) for collecting ambient light data is provided above the mounting base (41), and the sensor (10) is connected to the central controller.

8. The automatic measuring instrument for eyeglass fitting according to claim 1, characterized in that: The operation screen (3) is also provided with a lens fitting result display area (11).

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