An endoscope testing device

Abstract

The utility model relates to an endoscope testing arrangement, including casing, integrating sphere, test signboard and light source module, and light source module includes light source, light guide path and diaphragm mechanism, diaphragm mechanism includes seat body, a plurality of louvers and drive assembly, a plurality of louvers are set on seat body and are commonly defined a diaphragm hole, drive assembly is used for driving a plurality of louvers movement to change the area size of diaphragm hole, and the light brightness is adjusted through the adjustment diaphragm hole size and non light source current, fundamentally overcome the color temperature drift problem caused by current variation, light guide path includes main path and two branch paths, and the starting end of two branch paths is connected on main path, and the light exit surface of its end point respectively faces two pieces of light -evening board, and the light source is guided to light -evening board through branch path, realizes the absolute consistency of target area and background area illumination color temperature in test environment, eliminates the inherent color temperature difference interference of double independent light source system, and improves test accuracy.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, specifically to an endoscope testing device. Background Technology

[0002] With the popularization of minimally invasive surgical techniques, endoscopes have become an indispensable key device in medical diagnosis and treatment. Their image quality directly affects the accuracy of doctors' diagnoses and the outcome of surgeries; therefore, objective and accurate image performance testing of endoscopes is crucial.

[0003] Currently, both domestically and internationally, industry standards such as YY / T 1603 and YY / T 1587 are widely used to regulate the testing process of endoscopes. These standards clearly require testing of core parameters of endoscopes, such as static image tolerance and brightness response characteristics, and specify the corresponding testing equipment and methods. In standard testing methods, a testing device with two sets of light sources is typically required: light source A and light source B. Light source B is used to provide uniform illumination to the background of the test target. Light source A is used to illuminate small grayscale blocks (such as grayscale scales or test charts) on the target. The brightness of light source A must be precisely adjustable over a wide range so that the grayscale blocks continuously change from a completely dark state to an overexposed state during imaging, and at least 10 different brightness levels, with no fewer than 8 images per level, are acquired during this process.

[0004] In existing technologies, light source A and light source B are typically two independent light source systems. For example, light source A may use a halogen tungsten lamp, while light source B may use a fluorescent lamp or LED. This approach results in an inherent color temperature difference between the target area and the background area in the testing environment, thus interfering with the test results. Furthermore, the devices used to implement the function of light source A have numerous defects, severely impacting the accuracy and efficiency of the test. For instance, when a uniform light box is used as light source A, the color temperature of the light box changes significantly during brightness adjustment (usually by adjusting the drive current), affecting the color reproduction characteristics of the endoscope image and ultimately leading to inaccurate test results. Moreover, light box brightness adjustment usually relies on a controller, which also has limitations in terms of the range and accuracy of brightness adjustment. Summary of the Invention

[0005] The purpose of this invention is to provide a novel endoscopic testing device with better precision, accuracy and efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides an endoscope testing device, including a housing, an integrating sphere, a test plate, and a light source module for projecting light into the integrating sphere. The housing has a test chamber with a dark box structure inside. The integrating sphere and the test plate are located in the test chamber. The test plate is disposed outside the light outlet of the integrating sphere. The light source module includes a light source, a light guide path, and an aperture mechanism. The aperture mechanism is located outside the entrance of the integrating sphere and includes a base, multiple light-shielding plates and a driving assembly. The multiple light-shielding plates are movably disposed on the base and together define an aperture. The driving assembly is used to drive the multiple light-shielding plates to move, thereby changing the area of ​​the aperture and switching the aperture between a maximum area state and a fully blocked state. The light guide path includes a main path and two branch paths. The light source is located at the beginning of the main path, and the aperture mechanism is located on the main path. The beginnings of the two branch paths are connected to the main path and are located on the light incident side of the aperture mechanism. Each branch path has a light emitting surface at its end. The light emitting surfaces face a light homogenizing plate, and the two light homogenizing plates are symmetrically arranged on the side of the test target plate away from the light emitting port of the integrating sphere.

[0007] In some embodiments, the number of light-shielding sheets is four, which are two first light-shielding sheets arranged opposite each other along a first direction and two second light-shielding sheets arranged opposite each other along a second direction perpendicular to the first direction.

[0008] In some embodiments, the driving assembly includes a first driving unit and a second driving unit, wherein the first driving unit drives the two first light-shielding sheets to move synchronously toward or away from each other, and the second driving unit drives the two second light-shielding sheets to move synchronously toward or away from each other.

[0009] In some embodiments, when the aperture is fully blocked, the opposite edges of the two first light-shielding plates are tightly fitted and overlap in a direction parallel to the optical axis, and the opposite edges of the two second light-shielding plates are tightly fitted and overlap in a direction parallel to the optical axis. Specifically, the opposite edges of the first light-shielding plates and / or the second light-shielding plates are provided with concave and convex portions. When the aperture is fully blocked, the corresponding two concave and convex portions interlock to form an interlocking structure.

[0010] In some embodiments, the main path has two parallel main paths, and the light sources at the starting ends of the two main paths are both cold light sources, one of which is an endoscope cold light source.

[0011] In some embodiments, the testing apparatus further includes a connector disposed at the end of the main path. The connector includes a connector body and a beam splitter disposed on the light-emitting side of the connector body. The beam splitter forms three light-emitting branches for splitting the light into at least three output paths. The light-emitting surface of one of the three light-emitting branches faces the entrance of the integrating sphere, and the remaining two are respectively connected to two branch paths. Further, the light-emitting branches connecting the two branch paths are symmetrically located on both sides.

[0012] In some embodiments, the connector further includes a beam extension portion disposed between the connector body and the beam splitter portion, the beam extension portion being configured as a cone with its internal cavity cross-sectional area gradually expanding along the light path emission direction.

[0013] In some embodiments, the testing apparatus further includes an aperture corresponding to the light-diffusing plate, the aperture being detachably disposed between the light-diffusing plate corresponding to it and the light-emitting surface of the branch path.

[0014] In some embodiments, the testing apparatus further includes an aperture mechanism controller, which is signal-connected to the drive component and used to control the action of the drive component to adjust the area of ​​the aperture.

[0015] In some embodiments, the integrating sphere contains a luminance meter.

[0016] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: This invention designs an aperture mechanism that automatically controls the aperture opening using a drive component, enabling continuous and precise switching between maximum light-transmitting area and complete blocking. This design adjusts the output brightness by regulating the aperture size rather than the light source current, fundamentally overcoming the color temperature drift problem caused by current variations. Simultaneously, the automatic adjustment of the aperture opening achieves more precise and efficient brightness regulation.

[0017] This invention also guides the light source to the light uniform plate through a branch path, achieving absolute consistency of the light color temperature between the target area and the background area in the test environment, eliminating the interference of color temperature difference inherent in dual independent light source systems, and improving test accuracy. Attached Figure Description

[0018] Figure 1 This is a simplified structural diagram of the endoscopic testing device of Example 1; Figure 2 This is a schematic diagram of the aperture mechanism in Example 1; Figure 3 This is a schematic diagram of the aperture mechanism of Embodiment 1 from another angle; Figure 4This is a schematic diagram of the connector structure in Example 1; Figure 5 This is a schematic diagram of the light-diffusing plate in Example 1; Figure 6 This is a schematic diagram of the aperture plate in Example 1; The components include: 1. Aperture mechanism; 11. Base; 12. Light-shielding plate; 121. Concave and convex parts; 13. Drive motor; 14. Drive shaft; 15. Sliding component; 16. Aperture hole; 2. Light source module; 21. Cold light source; 22. Endoscope cold light source; 23. Main path; 24. Branch path; 25. Connector; 251. Connector body; 252. Beam extension section; 253. Beam splitter section; 3. Integrating sphere; 31. Luminometer; 4. Test plate; 5. Light-diffusing plate; 51. Aperture; 6. Aperture mechanism controller; 7. Endoscope; 71. Endoscope main unit; 8. Data acquisition card; 9. Main unit. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0020] The implementation conditions used in the embodiments can be further adjusted according to different requirements of specific applications. Implementation conditions not specified are standard conditions in this industry. The technical features involved in the various embodiments of this invention can be combined with each other as long as they do not conflict with each other.

[0021] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0022] In the description of the embodiments of this utility model, it should be understood that the terms "front," "rear," etc., indicate the orientation or positional relationship based on... Figure 1 This description is provided for the convenience of describing the embodiments of the present invention and for the purpose of simplifying the description. It is not intended to 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 on the embodiments of the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed. Example 1

[0025] An endoscopic testing device, such as Figure 1 As shown, it includes a housing, an integrating sphere 3, a test plate 4, and a light source module 2. The housing contains a dark chamber to isolate stray light and provide a stable testing environment for the endoscope 7 under test. The integrating sphere 3 and the test plate 4 are located within the test chamber, with the test plate 4 positioned outside the light outlet of the integrating sphere 3. The light source module 2 projects light into the integrating sphere 3 and includes a light source, a light guide path, and an aperture mechanism 1. The aperture mechanism 1 is located outside the entrance of the integrating sphere 3 and includes a base 11, multiple light-shielding plates 12, and a driving assembly. The multiple light-shielding plates 12 are movably mounted on the base 11 and collectively define an aperture 16. The driving assembly drives the multiple light-shielding plates 12 to change the area of ​​the aperture 16 and switch the aperture 16 between its maximum area and a fully blocked state. This design adjusts the output brightness by adjusting the size of the aperture 16 rather than the light source current, fundamentally overcoming the color temperature drift problem caused by current changes. In addition, by using the drive component to automatically control the opening of the aperture 16, more precise and efficient brightness adjustment is achieved.

[0026] like Figure 2 and Figure 3 As shown, the number of light-shielding plates 12 is preferably four, consisting of two first light-shielding plates and two second light-shielding plates. The two first light-shielding plates are arranged opposite each other along a first direction (the length direction of the base 11), and the two second light-shielding plates are arranged opposite each other along a second direction perpendicular to the first direction (the width direction of the base 11). The driving assembly includes a first driving unit and a second driving unit. The first driving unit is used to drive the two first light-shielding plates to move synchronously towards or away from each other, and the second driving unit is used to drive the two second light-shielding plates to move synchronously towards or away from each other.

[0027] By setting two sets of drive units to independently control the light-shielding plates 12 in two directions, the shape (length-to-width ratio) and opening size of the aperture 16 can be precisely and independently adjusted in two dimensions. This decoupled design allows the aperture to form a variety of custom openings, meeting the precise requirements for the shape of the light spot in different application scenarios. The flexibility and precision of the control are far superior to those of a single-drive linkage mechanism. At the same time, since the two sets of light-shielding plates 12 move synchronously in opposite directions, the geometric center of the aperture formed by the four light-shielding plates 12 and the base 11 remains unchanged during the adjustment process, thereby ensuring the stability of the optical axis and avoiding light spot drift caused by changes in the aperture opening, thus improving the stability and reliability of the detection.

[0028] Furthermore, to ensure that the aperture 16 can be completely blocked and prevent light from passing through the center, when the aperture 16 is fully blocked, the opposite edges of the two first light-blocking plates are tightly fitted and overlap in a direction parallel to the optical axis, and the opposite edges of the two second light-blocking plates are tightly fitted and overlap in a direction parallel to the optical axis. In this embodiment, the opposite edges of the two first light-blocking plates and the two second light-blocking plates are provided with concave and convex portions 121, and the corresponding two concave and convex portions 121 can fit into each other to form an interlocking structure, thereby achieving complete blocking of the light-transmitting aperture.

[0029] In this embodiment, both the first driving unit and the second driving unit include a driving motor 13, a driving shaft 14, and sliding members 15. The driving shaft 14 is connected to the output shaft of the driving motor 13 and configured to rotate with it. The driving shaft 14 has bidirectional threaded sections with opposite directions of rotation. There are two sets of sliding members 15, which are threadedly connected to the bidirectional threaded sections on both sides of the driving shaft 14 and respectively connected to two first light-shielding plates (or second light-shielding plates). When the driving motor 13 starts, the driving shaft 14 rotates, and through the threaded engagement of its bidirectional threaded sections with the sliding members 15, the two sets of sliding members 15 are driven to slide synchronously towards or away from each other along a first direction (or a second direction), thereby causing the two connected first light-shielding plates (or second light-shielding plates) to move synchronously towards or away from each other. In other embodiments, for example, a gear-rack transmission mechanism or a linear motor direct drive mechanism can be used to achieve the synchronous movement of the two first and second light-shielding plates.

[0030] Preferably, the testing device also includes an aperture mechanism controller 6, which is signal-connected to the drive component and used to control the action of the drive component to automatically adjust the area of ​​the aperture 16.

[0031] The light guide path includes a main path 23 and two branch paths 24. A light source is located at the beginning of the main path 23. Preferably, the main path 23 has two parallel main paths 23, with the light source at the beginning of both main paths 23 being a cold light source 21, one of which is an endoscope cold light source 22. This allows users to choose either the cold light source 21 provided with the device or the cold light source from the endoscope 7 itself, thus increasing the test's versatility. An aperture mechanism 1 is located at the end of the main path 23. The beginnings of the two branch paths 24 are connected to the main path 23 via connectors 25 and are located on the light incident side of the aperture mechanism 1. Each branch path 24 has a light-emitting surface at its end, facing a uniform light plate 5. The two uniform light plates 5 are symmetrically arranged on the side of the test target plate 4 opposite to the light outlet of the integrating sphere 3. Figure 5 and Figure 6 As shown, an aperture 51 is provided between the light-emitting surface of the light-diffusing plate 5 and the light-emitting surface of the branch path 24. The aperture 51 is detachably set to meet the testing needs of different endoscopes 7.

[0032] The connector 25 includes a connector body 251 and an optical path distribution assembly disposed within the connector body 251. The connector body 251 has two parallel connecting ends, which are respectively connected to two main paths 23. The optical path distribution assembly includes a beam expansion section 252 and a beam splitting section 253. The beam expansion section 252 is constructed as a cone with its internal cavity cross-sectional area gradually expanding along the optical path emission direction, thereby increasing the light incident area, facilitating beam splitting, and improving the adjustment accuracy of the aperture 16 size. The beam splitting section 253 forms three light output branches for splitting the light into at least three output paths. The light output surface of one of the three light output branches faces the entrance of the integrating sphere 3, and this light output branch is located in the middle; the remaining two are respectively connected to the two branch paths 24 and are symmetrically arranged.

[0033] The integrating sphere 3 can be referred to in the prior art, and it contains a luminance meter 31.

[0034] The endoscopic testing device also includes a main unit 71 (71) and a data acquisition card 8 (8). The main unit 71 is communicatively connected to the data acquisition card 8. The main unit 9 is communicatively connected to the aperture mechanism controller 6. The main unit 9 runs control software configured to execute the following automated testing procedures: The software controls the aperture mechanism controller 6, driving the light-blocking plate 12 to move, causing the area of ​​its aperture 16 to gradually change from a minimum to a maximum value, or vice versa, according to a predetermined pattern (e.g., linearly or stepwise). During this process, the software synchronously controls the luminance meter 31 to perform continuous or intermittent luminance sampling and records all collected luminance data. From the recorded luminance data, the system's minimum luminance value Lmin and saturation luminance value Lsat are extracted.

[0035] The software receives the number N of brightness points to be tested, input by the user. Based on the obtained Lmin and Lsat, and the user-input number N, the software automatically calculates the movement distance of the light-shielding plate 12 on the brightness scale. The calculation principle of this distance is: within the brightness range of Lmin to Lsat, N logarithmically or linearly distributed test points are generated to ensure the uniformity of the test. The software controls the aperture mechanism controller 6 to drive the movement of the light-shielding plate 12, measures the brightness value at each brightness point, and acquires the image through the acquisition card 8.

[0036] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An endoscope testing device, comprising a housing, an integrating sphere (3), a test plate (4), and a light source module (2) for projecting light into the integrating sphere (3), wherein a test chamber with a dark box structure is formed inside the housing, the integrating sphere (3) and the test plate (4) are located inside the test chamber, and the test plate (4) is disposed outside the light outlet of the integrating sphere (3), characterized in that: The light source module (2) includes a light source, a light guide path, and an aperture mechanism (1). The aperture mechanism (1) is located outside the entrance of the integrating sphere (3), and includes a base (11), multiple light-shielding plates (12) and a driving assembly. The multiple light-shielding plates (12) are movably disposed on the base (11) and together define an aperture (16). The driving assembly is used to drive the multiple light-shielding plates (12) to move, so as to change the area of ​​the aperture (16) and switch the aperture (16) between the maximum area state and the fully blocked state. The light guide path includes a main path (23) and two branch paths (24). The light source is provided at the beginning of the main path (23), and the aperture mechanism (1) is provided on the main path (23). The beginnings of the two branch paths (24) are connected to the main path (23) and located on the light incident side of the aperture mechanism (1). Each branch path (24) has a light emitting surface at its end. The light emitting surfaces face a light homogenizing plate (5) respectively. The two light homogenizing plates (5) are symmetrically arranged on the side of the test plate (4) away from the light emitting port of the integrating sphere (3).

2. The endoscopic testing device according to claim 1, characterized in that: The number of light-shielding sheets (12) is four, which are two first light-shielding sheets arranged opposite each other along a first direction and two second light-shielding sheets arranged opposite each other along a second direction perpendicular to the first direction; The driving assembly includes a first driving unit and a second driving unit. The first driving unit drives the two first light-shielding sheets to move synchronously towards or away from each other, and the second driving unit drives the two second light-shielding sheets to move synchronously towards or away from each other.

3. The endoscopic testing device according to claim 2, characterized in that: When the aperture (16) is in a fully shielded state, the opposite side edges of the two first light-shielding plates are closely fitted and overlap in a direction parallel to the optical axis, and the opposite side edges of the two second light-shielding plates are closely fitted and overlap in a direction parallel to the optical axis.

4. The endoscopic testing device according to claim 3, characterized in that: The first light-shielding sheet and / or the second light-shielding sheet are provided with concave and convex portions (121) on opposite side edges. When the aperture (16) is in a fully shielded state, the corresponding two concave and convex portions (121) fit together to form an interlocking structure.

5. The endoscopic testing device according to claim 1, characterized in that: The main path (23) has two parallel main paths (23), and the light source at the starting end of the two main paths (23) is a cold light source (21), one of which is an endoscope cold light source (22).

6. The endoscopic testing device according to claim 1, characterized in that: The testing device also includes a connector (25) disposed at the end of the main path (23). The connector (25) includes a connector body (251) and a beam splitter (253) disposed on the light-emitting side of the connector body (251). The beam splitter (253) has three light-emitting branches for splitting the light into at least three output paths. The light-emitting surface of one of the three light-emitting branches faces the entrance of the integrating sphere (3), and the remaining two are respectively connected to two branch paths (24).

7. The endoscopic testing device according to claim 6, characterized in that: The connector (25) further includes a beam extension portion (252) disposed between the connector body (251) and the beam splitter portion (253), the beam extension portion (252) being configured as a cone with its inner cavity cross-sectional area gradually expanding along the light path emission direction.

8. The endoscopic testing device according to claim 1, characterized in that: The testing device also includes an aperture (51) corresponding to the light-diffusing plate (5), which is detachably disposed between the light-diffusing plate (5) and the light-emitting surface of the branch path (24).

9. The endoscopic testing device according to claim 1, characterized in that: The testing device also includes an aperture mechanism controller (6), which is signal-connected to the drive component and is used to control the action of the drive component to adjust the area of ​​the aperture (16).

10. The endoscopic testing device according to claim 1, characterized in that: The integrating sphere (3) is equipped with a luminance meter (31).

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