Medical hard endoscope linear fitting degree testing device
By designing a linear fit testing device for rigid medical endoscopes, the problems of complex operation and insufficient compatibility of endoscope testing equipment have been solved. This device enables simple and efficient linear fit testing and optical performance evaluation, and is applicable to the testing and calibration of various endoscopes.
Patent Information
- Application Number
- CN202520814272.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-27
- Publication Date
- 2026-05-15
- Estimated Expiration
- 2035-04-27
AI Technical Summary
Existing endoscopic testing equipment is complex to operate, unsuitable for non-optics professionals, lacks compatibility, cannot be adapted to different brands of endoscopes, and lacks systematic linear fit testing.
Design a linear fitting test device for a rigid medical endoscope, including a fixing plate, a transmission light box, a worktable and an illuminometer. Adjust the position of the endoscope by lifting and translating the stage, and perform linear fitting analysis using Imatest, ImageJ or Matlab software.
It enables simple linear fit testing, reduces testing costs, improves product performance, is applicable to the optical performance evaluation of endoscopes of different brands and specifications, and supports calibration after fault repair.
Smart Images
Figure CN224247272U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical device testing technology and relates to a linear fitting degree testing device for rigid medical endoscopes. It is used to evaluate the linear relationship of the optical performance of endoscopes (such as brightness response curve and signal-to-noise ratio) to ensure that they comply with medical industry standards (such as YY 0068.1-2008, ISO 8600 series, etc.). Background Technology
[0002] Existing endoscope testing equipment mostly focuses on single performance testing (such as field of view and distortion), while linear fitting degree testing requires combining optical response characteristics and automated algorithms, which has the following problems: (1) The testing equipment on the market is diverse and complicated to operate, and is not suitable for medical staff and non-optical professionals to operate; (2) Insufficient compatibility, unable to adapt to the clamping and testing needs of different brands of endoscopes. The design of this utility model is as follows: (1) This method can systematically evaluate the imaging linearity characteristics of rigid endoscopes, providing a quantitative basis for optical performance optimization or quality control; (2) It is suitable for medical device testing institutions, endoscope manufacturers and medical institution quality control departments, which can significantly reduce testing costs and improve product performance. In the future, an integrated testing platform can be further developed; (3) It can be used by medical engineering-related departments of medical institutions to conduct testing and calibration of the optical performance of the linear fitting degree of medical rigid endoscopes after repairing endoscope system failures; (4) It can be used to conduct comparative evaluation tests on the linear fitting optical performance of medical rigid endoscope systems of different brands and specifications.
[0003] To address this issue, a linear fit testing device for rigid medical endoscopes was designed to overcome the aforementioned problems. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a simple, reasonable, practical and convenient medical rigid endoscope linear fitting degree testing device.
[0005] This utility model is achieved through the following technical solution: a medical rigid endoscope linear fitting degree testing device, which includes a device body and an illuminometer set outside the device. The device body consists of a fixed plate, a transmissive light box, and a worktable. The worktable and the transmissive light box are installed on the fixed plate. An endoscope is installed on the worktable, which faces the transmissive light box below. A test card is installed above the transmissive light box.
[0006] Preferably, the worktable consists of a lifting displacement platform, a translation platform, and a transition plate. The translation platform is installed on the lifting displacement platform and can be raised and lowered on the lifting displacement platform. An installation platform is provided on the translation platform, and a transition plate is installed on the installation platform. An angle fixing bracket is installed on the transition plate, and a support rod is installed on the angle fixing bracket. An endoscope is installed on the support rod through a support rod clamp. The endoscope is directly facing the projection light box below.
[0007] Preferably, the bottom of the lifting displacement platform is provided with a square base with through holes, and multiple evenly arranged fixing threaded holes are also provided on the fixing plate. The initial position of the lifting displacement platform is fixed and adjusted through the through holes and fixing threaded holes.
[0008] Preferably, the translation platform is also provided with multiple mounting holes, and the adapter plate is provided with multiple evenly arranged mounting through holes, so that the extension distance can be adjusted by adjusting the mounting position of the adapter plate.
[0009] Preferably, the projection light box is a box with the same width as the fixing plate, and a light fixture is placed inside. The upper two sides of the box have first insertion edges to facilitate the insertion and fixing of the test card, and the bottom two sides also have second insertion edges to facilitate insertion into the sides of the fixing plate and prevent displacement.
[0010] Preferably, the projection light box has anti-collision cotton attached to the side opposite the lifting and displacement platform, and a protruding anti-collision strip is provided on the side of the lifting and displacement platform facing the projection light box. A cotton head is installed at the end of the anti-collision strip to prevent the two from colliding when adjusting the distance between them. A lux meter is also provided on the side of the projection light box away from the lifting and displacement platform.
[0011] The beneficial effects of this utility model are as follows:
[0012] The medical rigid endoscope linear fitting degree testing device designed in this utility model achieves the following: (1) The imaging linearity characteristics of rigid endoscopes can be systematically evaluated through this device, providing a quantitative basis for optical performance optimization or quality control; (2) It is suitable for medical device testing institutions, endoscope manufacturers and medical institution quality control departments, which can significantly reduce testing costs and improve product performance. In the future, an integrated testing platform can be further developed; (3) It can be used by medical engineering-related departments of medical institutions to conduct testing and calibration of the optical performance of the linear fitting degree of medical rigid endoscopes after repairing endoscope system malfunctions; (4) It can be used to conduct comparative evaluation tests on the linear fitting optical performance of medical rigid endoscope systems of different brands and specifications. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model.
[0014] Figure 2This is a schematic diagram of the structure of a transmission-type 36-order dynamic range test card. Detailed Implementation
[0015] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.
[0016] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0017] The present invention will now be described in detail with reference to the accompanying drawings: Figure 1-2 As shown, a medical rigid endoscope linear fitting degree testing device includes a device body and an illuminometer set outside the device. The device body consists of a fixed plate 1, a transmissive light box 8, and a worktable. The worktable and the transmissive light box 8 are installed on the fixed plate 1. An endoscope 10 is installed on the worktable, with the endoscope 10 facing the transmissive light box 8 below. A test card 9 is installed above the transmissive light box 8.
[0018] The test card of this utility model is a transmission-type 36-order dynamic range test card with 36 low-noise color blocks. It is available in multiple versions of 50dB, 100dB, and 150dB, meeting the needs of low, wide, and ultra-large dynamic range testing. It can test the linear fitting degree of medical rigid endoscope imaging systems.
[0019] The endoscope of this utility model is a rigid endoscope, generally a 30-degree rigid endoscope (it can also be 0 degrees, 12 degrees, 45 degrees, 70 degrees, 90 degrees, or 110 degrees), and the outer diameter is generally 10 mm (it can also be 2.7 mm, 3 mm, 4 mm, 5 mm, 6 mm, or 8 mm).
[0020] The workbench consists of a lifting displacement platform 2, a translation platform 3, and a transition plate 4. The translation platform 3 is installed on the lifting displacement platform 2 and can be raised and lowered on the lifting displacement platform 2. An installation platform is provided on the translation platform 3, and the transition plate 4 is installed on the installation platform. An angle fixing bracket 5 is installed on the transition plate 4, and a support rod 6 is installed on the angle fixing bracket 5. An endoscope 10 is installed on the support rod 6 through a support rod clamp 7. The endoscope 10 is directly facing the projection light box 8 below.
[0021] The support rod clamp moves the endoscope up, down, left, and right, making the rigid endoscope's camera surface parallel to the transmissive 36-step dynamic range test chart, so that the image of the transmissive 36-step dynamic range test chart is exactly at the top and bottom edges of the rigid endoscope.
[0022] The bottom of the lifting displacement platform 2 is provided with a square base 12, on which a through hole (not shown in the figure) is opened. Multiple evenly arranged fixing threaded holes 13 are also opened on the fixing plate 1. The initial position of the lifting displacement platform 2 is fixed and adjusted by the through hole and the fixing threaded hole 13.
[0023] The translation stage 3 is also provided with multiple mounting holes 14, and the adapter plate 4 is provided with multiple evenly arranged mounting through holes 15. Adjusting the mounting position of the adapter plate 4 can adjust the distance of its extension.
[0024] The projection light box 8 is a box with the same width as the fixing plate 1. The light fixture is placed inside. The upper two sides of the box have first insertion edges 16 to facilitate the insertion and fixing of the test card 9. The bottom two sides also have second insertion edges 17 to facilitate insertion into the sides of the fixing plate 1 and prevent displacement.
[0025] The projection light box 8 has anti-collision cotton 18 attached to the side opposite the lifting platform 2. A protruding anti-collision strip 19 is provided on the side of the lifting platform 2 facing the projection light box, and a cotton head 20 is installed at the end of the anti-collision strip to prevent the two from colliding when adjusting the distance between them. A lux meter 11 is also provided on the side of the projection light box 8 away from the lifting platform 2.
[0026] The working process of this utility model is as follows:
[0027] The illuminance values of 36 color patches (denoted as L1-L36) of the transmission-type 36-level dynamic range test chart are measured using illuminance meter 11. Then, the transmission-type 36-level dynamic range test chart 9 is photographed through rigid endoscope 10 and its rear optical processing system. The gray values of the 36 color patches (denoted as V1-V36) are then extracted using software such as Imatest, ImageJ, or Matlab. It is recommended to take the average value of the central 80% area to reduce the influence of noise. Finally, linear fitting analysis is performed, and the steps are as follows.
[0028] Step 1, Data Normalization: Normalize the illuminance value L i and grayscale value V i Normalize to the range [0, 1] respectively
[0029]
[0030] Step 2, Linear Regression Model: Establish a linear equation and calculate the slope a and intercept b using the least squares method.
[0031]
[0032] Step 3, Goodness-of-fit assessment: Calculate the coefficient of determination R. 2The degree of agreement between the standard actual data and the fitted straight line
[0033]
[0034] in This is an estimated value. This is the average value.
[0035] R 2 The value of R ranges from 0 to 1, with values closer to 1 indicating a better fit and values closer to 0 indicating a worse fit. 2 A value ≥0.99 indicates that the data points almost perfectly match the straight line. If R... 2 A value of ≥0.95 indicates that the value is within the acceptable range.
[0036] The medical rigid endoscope linear fitting degree testing device designed in this utility model can effectively achieve: (1) the imaging linearity characteristics of rigid endoscopes can be systematically evaluated through this device and the above method, providing a quantitative basis for optical performance optimization or quality control; (2) it is suitable for medical device testing institutions, endoscope manufacturers and medical institution quality control departments, which can significantly reduce testing costs and improve product performance, and can further develop an integrated testing platform in the future; (3) it can be used by medical engineering-related departments of medical institutions to conduct testing and calibration of the optical performance of the linear fitting degree of medical rigid endoscopes after repairing endoscope system failures; (4) it can be used to conduct comparative evaluation tests of the optical performance of the linear fitting of medical rigid endoscope systems of different brands and specifications.
[0037] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. A linear fitting degree testing device for a rigid medical endoscope, characterized in that: It includes a device body and an illuminance meter installed outside the device. The device body consists of a fixed plate, a transmissive light box, and a worktable. The worktable and the transmissive light box are mounted on the fixed plate. The worktable consists of a lifting platform, a translating platform, and a connecting plate. The translating platform is mounted on the lifting platform and can move up and down on the lifting platform. A mounting platform is set on the translating platform, and a connecting plate is mounted on the mounting platform. An angle fixing bracket is mounted on the angle fixing bracket, and a support rod is mounted on the support rod. An endoscope is mounted on the support rod clamp. The endoscope faces the transmissive light box below, and a test card is installed above the transmissive light box. The side of the transmissive light box opposite the lifting platform is covered with anti-collision cotton. A protruding anti-collision strip is provided on the side of the lifting platform facing the transmissive light box, and a cotton head is installed at the end of the anti-collision strip. The illuminance meter is located on the side of the transmissive light box away from the lifting platform.
2. The medical rigid endoscope linear fitting degree testing device according to claim 1, characterized in that: The bottom of the lifting displacement platform is provided with a square base with through holes. Multiple evenly arranged fixing threaded holes are also provided on the fixing plate. The initial position of the lifting displacement platform is fixed and adjusted through the through holes and fixing threaded holes.
3. The medical rigid endoscope linear fitting degree testing device according to claim 1, characterized in that: The translation platform is also provided with multiple mounting holes, and the adapter plate is provided with multiple evenly arranged mounting through holes. Adjusting the mounting position of the adapter plate can adjust the distance of its extension.
4. The medical rigid endoscope linear fitting degree testing device according to claim 1, characterized in that: The transmissive light box is a box with the same width as the fixing plate. The light fixture is placed inside. The top two sides of the box have first insertion edges to facilitate the insertion and fixing of the test card. The bottom two sides also have second insertion edges to facilitate insertion into the sides of the fixing plate and prevent displacement.
5. The medical rigid endoscope linear fitting degree testing device according to claim 1, characterized in that: The test card is a transmission-type 36-order dynamic range test card.