Cold light source system of endoscope and adjusting method of cold light source system

Abstract

The invention discloses a cold light source system of an endoscope and an adjusting method of the cold light source system, and relates to the technical field of medical instruments.The cold light source system of the endoscope comprises a shell, a light source, a coupling lens, a dichroic piece and a focusing lens; light rays emitted by the light source are converged by the coupling lens, split by the dichroic sheet and focused by the focusing lens to form light spots to be emitted to the endoscope; the light source is movably connected with the shell through the X-axis adjusting assembly and the Y-axis adjusting assembly, the photoelectric sensor is arranged on the focusing lens and used for obtaining light signals on the light emitting face of the focusing lens and converting the light signals into electric signals, the controller is electrically connected with the photoelectric sensor, and the controller is electrically connected with the controller. The control module is used for controlling the X-axis adjusting assembly and / or the Y-axis adjusting assembly to drive the light source to move correspondingly according to the electric signals. According to the cold light source system of the endoscope and the adjusting method of the cold light source system, by adjusting the installation positions of the components in the cold light source system, light is adjusted to be emitted according to the preset light path.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a cold light source system of an endoscope and an adjustment method thereof. Background Art

[0002] The cold light source system of the endoscope system has a normal observation mode and a special light observation mode (narrow-band light spectrum). Among them, the special light observation mode includes a vascular emphasis observation mode, which can emphasize the observation of blood vessels inside the mucosa of the observation site. For example, in the vascular emphasis observation mode, the vascular pattern can be obtained as vascular information for diagnosis of benign and malignant tumors. In this mode, illumination light containing light components in a specific wavelength band is irradiated to the observation site, and the light in this specific wavelength band has a high absorption coefficient for hemoglobin in the blood. In the normal observation mode, a multi-color normal observation image suitable for observing all the characteristics of the observation site is generated as the display image; and in the vascular emphasis observation mode, a vascular emphasis observation image suitable for observing the vascular pattern is generated as the display image.

[0003] The cold light source system of an endoscope system that can realize special light observation mode can meet the needs of narrow-band light imaging and adaptive dimming. It generally includes an optical light path (including a dichroic filter, an optical coupling lens, and an optical focusing lens), a light source (including an LED light source, a light source mounting structure, and a light source heat dissipation structure), a driving circuit (including a multi-channel pulse width modulation high-power driving module), and a touch screen (including control software and online upgrade software). In the multi-spectral optical light path structure, light is emitted by an LED light source, and the optical coupling lens group converges the divergent light into parallel light, which is then split by a dichroic filter and finally aggregated by a group of optical focusing lenses and sent to the light guide part of the endoscope. In the cold light source system with multi-path coupling, the relative position accuracy of the structural parts, the processing accuracy of the components, and the assembly accuracy are required to be high. Under the traditional relatively fixed installation architecture, the problem of light angle deviation is prone to occur, which ultimately has a negative impact on the light quality.

[0004] To mitigate these issues, existing technologies typically require manual optical calibration of each cold light source during installation and maintenance. This is not only time-consuming and requires operator experience, but also fails to guarantee product consistency. Alternatively, to reduce labor requirements and enhance product consistency, higher-precision optical components can be used in the optical path. However, such higher-precision components significantly increase costs. Summary of the Invention

[0005] The purpose of the present application is to provide a cold light source system for an endoscope and an adjustment method thereof, by adjusting the installation position of its internal components so that light is emitted according to a preset light path, thereby solving the problem of light angle deviation in existing cold light source systems due to the use of a fixed installation method.

[0006] The embodiment of the present application is implemented as follows:

[0007] In a first aspect of an embodiment of the present application, a cold light source system for an endoscope is provided, comprising a housing and a light source, a coupling lens, a dichroic plate and a focusing lens arranged in the housing, wherein the light emitted by the light source is converged by the coupling lens, split by the dichroic plate and focused by the focusing lens to form a light spot and is emitted to the endoscope; the system also comprises an X-axis adjustment component, a Y-axis adjustment component, a controller and a photoelectric sensor, wherein the light source is movably connected to the housing through the X-axis adjustment component and the Y-axis adjustment component; the photoelectric sensor is arranged on the focusing lens, the photoelectric sensor is used to obtain a light signal on the light exit surface of the focusing lens and convert the light signal into an electrical signal, the controller is electrically connected to the photoelectric sensor, and the controller is used to control the X-axis adjustment component and / or the Y-axis adjustment component according to the electrical signal to drive the light source to move along the X-axis direction and / or the Y-axis direction.

[0008] As an implementation method, the housing is provided with a slide groove extending along the X-axis direction, the X-axis adjustment assembly includes a slide and a first driving member, the light source is arranged on the slide, the controller is electrically connected to the first driving member, and the controller is used to control the movement of the first driving member to drive the slide to move along the X-axis direction relative to the slide groove to correspondingly adjust the installation position of the light source along the X-axis direction.

[0009] As an implementation method, a rack extending along the X-axis direction is provided on the housing, a gear is rotatably provided on the slide, the gear and the rack are engaged, the first driving member is connected to the gear transmission, and the first driving member is used to drive the gear to rotate, and the slide is driven to move along the rack through the gear.

[0010] As an implementation method, the light source includes a base and a light source body fixed on the base, the Y-axis adjustment assembly includes a guide rod and a second driving member, the guide rod extends along the Y-axis direction, and the opposite ends of the guide rod are respectively passed through the base and the slide, the controller is electrically connected to the second driving member, and the controller is used to control the movement of the second driving member, driving the base to move along the guide rod relative to the slide, so as to correspondingly adjust the installation position of the light source body along the Y-axis direction.

[0011] As an implementation method, the Y-axis adjustment assembly also includes an elastic member, and the opposite ends of the elastic member are fixedly connected to the base and the slide respectively; when the second driving member rotates forward, it can drive the base to move toward the side close to the slide and compress the elastic member to store energy; when the second driving member reverses, the elastic member can release energy and drive the base to move toward the side away from the slide.

[0012] As an embodiment, the dichroic film is movably connected to the housing, the dichroic film includes a base and a dichroic film body fixedly arranged on the base, the housing is provided with a first mounting portion, the base is provided with a second mounting portion, the second mounting portion is rotatably matched with the first mounting portion to rotate the base and the housing, and the base is driven to rotate to adjust the installation angle of the dichroic film body along the axial direction of the first mounting portion.

[0013] A second aspect of the present application provides a method for adjusting a cold light source system of an endoscope, which is applied to the cold light source system of the endoscope described above. The method includes:

[0014] Acquiring an electrical signal emitted by the photoelectric sensor;

[0015] Acquiring the actual position of the light spot on the light-emitting surface of the focusing lens according to the electrical signal, and calculating the offset according to the actual position of the light spot and the preset light-emitting position;

[0016] The light source is controlled to move along the X-axis direction and / or the Y-axis direction according to the offset.

[0017] As an implementation method, with the center of the light-emitting surface of the focusing lens as the origin, the light-emitting surface of the focusing lens is divided into a first quadrant, a second quadrant, a third quadrant and a fourth quadrant along the X-axis direction and the Y-axis direction, and a photoelectric sensor is provided in each quadrant. The offset is calculated according to the actual position of the light spot and the preset light-emitting position, including: calculating the horizontal offset according to a preset horizontal offset algorithm, and calculating the vertical offset according to a preset vertical offset algorithm, wherein ΔX=(A+C)-(B+D), ΔY=(A+B)-(C+D), ΔX is the horizontal offset, ΔY is the vertical offset, A is the current value of the first quadrant, B is the current value of the second quadrant, C is the current value of the third quadrant, and D is the current value of the fourth quadrant.

[0018] As an implementation method, controlling the light source to move along the X-axis direction and / or the Y-axis direction according to the offset includes:

[0019] The horizontal adjustment amount is calculated based on the horizontal offset and a preset horizontal adjustment algorithm, and the vertical adjustment amount is calculated based on the vertical offset and a preset vertical adjustment algorithm, wherein: X norm is the horizontal adjustment amount, Y norm is the vertical adjustment amount;

[0020] The light source is controlled to move along the X-axis direction according to the horizontal adjustment amount, and / or the light source is controlled to move along the Y-axis direction according to the vertical adjustment amount.

[0021] As an implementation method, there are multiple light sources, and controlling the light source to move along the X-axis direction and / or the Y-axis direction according to the offset includes: according to the lighting order of the multiple light sources, controlling each light source to move along the X-axis direction and / or the Y-axis direction according to the offset in turn.

[0022] The beneficial effects of the embodiments of the present application include:

[0023] The cold light source system of the endoscope includes a housing and a light source, a coupling lens, a dichroic film and a focusing lens arranged in the housing. The light emitted by the light source is converged by the coupling lens, split by the dichroic film and focused by the focusing lens to form a light spot and then emitted to the endoscope; the cold light source system of the endoscope also includes an X-axis adjustment component, a Y-axis adjustment component, a controller and a photoelectric sensor. The light source is movably connected to the housing through the X-axis adjustment component and the Y-axis adjustment component; the photoelectric sensor is arranged on the focusing lens, and the photoelectric sensor is used to obtain the light signal on the light output surface of the focusing lens and convert the light signal into an electrical signal. The controller is electrically connected to the photoelectric sensor, and the controller is used to control the X-axis adjustment component and / or the Y-axis adjustment component according to the electrical signal to drive the light source to move along the X-axis direction and / or the Y-axis direction. The endoscope's cold light source system precisely controls the light propagation path by adjusting the mounting position of the light source via X-axis and Y-axis adjustment assemblies, thereby precisely adjusting the exit position of the light spot on the focusing lens. A controller and photoelectric sensor form a closed-loop feedback control system for real-time monitoring and adjustment of the light spot position. Through real-time feedback control, the endoscope's cold light source system automatically calibrates the light spot position, compensating for optical path deviations caused by device vibration, temperature fluctuations, or long-term use. This ensures more accurate focus of the light entering the endoscope, a wider effective light spot range, and a position and shape that better meets the requirements of endoscopic examinations. This improves illumination precision, provides physicians with a clearer and more accurate field of view, facilitates more precise observation of lesions, and enhances diagnostic accuracy. Furthermore, precise light spot adjustment avoids problems such as light loss and angular deviation, reducing image blur and distortion. When light is accurately focused and enters the endoscope at the appropriate angle, it enhances endoscopic imaging clarity and contrast, allowing physicians to more clearly observe tissue details and lesion characteristics, providing strong support for accurate diagnosis and contributing to improved medical diagnostic quality. Furthermore, the cold light source system of the endoscope can reduce the use of optical components with higher precision and cost to increase the range of the effective light spot, improve the accuracy of illumination, and realize automatic adjustment of the light spot at a lower cost, greatly reducing the manufacturing and after-sales costs of the endoscope cold light source. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic structural diagram of a cold light source system for an endoscope provided in an embodiment of the present application;

[0026] Figure 2 This is one of the structural diagrams of the light source provided in the embodiment of the present application;

[0027] Figure 3 The second structural diagram of the light source provided in the embodiment of the present application;

[0028] Figure 4 A schematic diagram of the structure of a dichroic film provided in an embodiment of the present application;

[0029] Figure 5 A schematic structural diagram of the focusing lens provided in an embodiment of the present application.

[0030] Icons: 10-light source; 11-base; 12-light source body; 20-coupling lens; 30-dichroic plate; 31-base; 311-second mounting portion; 32-dichroic plate body; 40-focusing lens; 41-photoelectric sensor; 51-slide; 511-gear; 512-slider; 52-first driving member; 53-rack; 61-guide rod; 62-second driving member; 63-elastic member; 70-housing; 71-first mounting portion; 81-first quadrant; 82-second quadrant; 83-third quadrant; 84-fourth quadrant. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0032] In the description of this application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of the application is usually placed when in use. These are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. Terms such as "first", "second", and "third" are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0033] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections, indirect connections through an intermediate medium, or connections within two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0034] like Figures 1 to 5 As shown, in a first aspect of an embodiment of the present application, a cold light source system for an endoscope is provided, comprising a housing 70 and a light source 10, a coupling lens 20, a dichroic plate 30 and a focusing lens 40 arranged in the housing 70. The light emitted by the light source 10 is converged by the coupling lens 20, split by the dichroic plate 30 and focused by the focusing lens 40 to form a light spot and then emitted to the endoscope; the cold light source system of the endoscope also includes an X-axis adjustment component, a Y-axis adjustment component, a controller and a photoelectric sensor 41. The light source 10 is movably connected to the housing 70 through the X-axis adjustment component and the Y-axis adjustment component; the photoelectric sensor 41 is arranged on the focusing lens 40, and the photoelectric sensor 41 is used to obtain the light signal on the light exit surface of the focusing lens 40 and convert the light signal into an electrical signal. The controller is electrically connected to the photoelectric sensor 41, and the controller is used to control the X-axis adjustment component and / or the Y-axis adjustment component according to the electrical signal to drive the light source 10 to move along the X-axis direction and / or the Y-axis direction.

[0035] It should be noted that the number of the light sources 10 can be one or more. Figure 1 As described above, the number of light sources 10 is 5, and the 5 light sources 10 can respectively emit light of different wavelength bands. The above 5 light sources 10 can achieve different lighting effects individually or in any combination, such as normal observation mode and special light observation mode.

[0036] It should be noted that the cold light source system of the endoscope includes a housing 70, a light source 10, a coupling lens 20, a dichroic filter 30, and a focusing lens 40 disposed therein. The light source 10 serves as the source of light, emitting light. However, these rays are initially quite divergent and cannot directly meet the light requirements of the endoscope. Therefore, the cold light source system of the endoscope also converges the divergent light emitted by the light source 10 through the coupling lens 20, directing the light in a relatively concentrated direction, thereby enhancing the light intensity and directionality. These converged rays are then directed to the dichroic filter 30. The dichroic filter 30 has spectroscopic properties, allowing it to separate the converged light according to characteristics such as wavelength, directing portions of the light in specific directions to the focusing lens 40. The focusing lens 40 then performs the final focusing process on these diverged rays, converging them into a single spot of light, which is ultimately transmitted to the endoscope, providing illumination for endoscopic inspection.

[0037] In order to precisely control the transmission path of light and the exit position of the light spot, the cold light source system of the endoscope is also equipped with an X-axis adjustment component and a Y-axis adjustment component. The light source 10 is movably connected to the housing 70 through the X-axis adjustment component and the Y-axis adjustment component. When the X-axis adjustment component is activated, it can drive the light source 10 to move along the X-axis direction. Similarly, when the Y-axis adjustment component is activated, it can drive the light source 10 to move along the Y-axis direction. Changes in the position of the light source 10 will affect the initial propagation direction of the light it emits. By changing the installation position of the light source 10, the exit position of the light spot on the focusing lens 40 can be precisely adjusted to ensure that the light can always be accurately focused and transmitted to the endoscope.

[0038] Compared with the existing technology, the cold light source system of the endoscope can accurately control the propagation path of light by adjusting the installation position of the light source 10 through the X-axis adjustment component and the Y-axis adjustment component, and then accurately adjust the exit position of the light spot on the focusing lens 40. As a result, the light that finally enters the endoscope can be focused more accurately. When multiple light sources 10 are combined to achieve different lighting effects, the area of ​​the effective light spot is larger. The position and shape of the lighting spot can better meet the needs of endoscopic examination, improve the accuracy of lighting, provide doctors with a clearer and more accurate field of view, help to more accurately observe the lesion site, and improve the accuracy of diagnosis. In addition, precise light spot adjustment can avoid problems such as light defocus and angle offset, and reduce image blur and deformation. When the light is accurately focused and enters the endoscope at a suitable angle, it can improve the clarity and contrast of the endoscopic imaging, allowing doctors to more clearly observe the details of the tissue and the characteristics of the lesion, provide strong support for accurate diagnosis, and help improve the quality of medical diagnosis.

[0039] The cold light source system of the endoscope also forms a closed-loop feedback control system through the controller and the photoelectric sensor 41, which is used to monitor and adjust the position of the light spot in real time. Through real-time feedback control, the cold light source system of the endoscope can automatically calibrate the position of the light spot and compensate for the optical path deviation caused by equipment vibration, temperature change or long-term use. Even in complex environments, it can ensure that the light spot is always stably focused on the required position of the endoscope, providing continuous and clear lighting and improving the imaging quality of the endoscope. Traditional cold light source systems require manual adjustment of the light path, which is cumbersome and relies on technical experience. The automatic adjustment function of the cold light source system of the endoscope greatly simplifies the operating process. The doctor or operator only needs to start the system to obtain the best lighting effect, saving operation time and improving work efficiency.

[0040] Specifically, the photoelectric sensor 41 is mounted on the focusing lens 40, for example, on the mounting bracket of the focusing lens 40, and is responsible for collecting the optical signals of the light spot in real time. These optical signals contain key information such as the position and intensity distribution of the light spot. The photoelectric sensor 41 converts the received optical signals into electrical signals (such as voltage or current changes) and transmits them to the controller. The controller receives the electrical signals from the photoelectric sensor 41 and analyzes and processes them. Using a preset algorithm or reference value, the controller can determine whether the current light spot position deviates from the ideal state. For example, if the light spot position is detected to be offset, the controller immediately calculates the direction and distance that need to be adjusted and sends control instructions to the X-axis adjustment assembly and the Y-axis adjustment assembly. The X-axis adjustment assembly and the Y-axis adjustment assembly act as actuators, precisely adjusting the position of the light source 10 according to the controller's instructions. The X-axis adjustment assembly drives the light source 10 horizontally, and the Y-axis adjustment assembly drives the light source 10 vertically, thereby changing the incident angle and path of the light.

[0041] As an implementation method, the photosensor 41 may include a photosensitive unit and a signal processing unit electrically connected to the photosensitive unit, the signal processing unit is electrically connected to the controller, the photosensitive unit is used to obtain light signals and generate photogenerated carriers, and the signal processing unit is used to convert photogenerated carriers into electrical signals.

[0042] It should be noted that the photosensitive unit, as the core component of photoelectric conversion, is usually made of photosensitive materials (such as silicon-based semiconductors). When the light signal on the light-emitting surface of the focusing lens 40 is irradiated to the photosensitive unit, the photon energy excites the electrons in the photosensitive material to generate electron-hole pairs (i.e., photogenerated carriers). The number of photogenerated carriers is proportional to the intensity of the incident light. Therefore, the photosensitive unit actually converts the intensity information of the light signal into the concentration information of the photogenerated carriers. The signal processing unit is responsible for further converting the photogenerated carriers generated by the photosensitive unit into electrical signals that can be processed by the controller. This process typically includes the following three key steps: First, photogenerated carrier collection. The signal processing unit separates and collects the photogenerated carriers onto the corresponding electrodes through a built-in electric field structure (such as a PN junction or Schottky junction), generating a photocurrent. Second, signal amplification. Since the photocurrent is usually very weak (microamperes or even less), the signal processing unit converts and amplifies the photocurrent into a voltage signal through an amplifier (such as a transimpedance amplifier). Third, signal conditioning. The amplified voltage signal may contain noise or interference. The signal processing unit conditions the signal through operations such as filtering and digitization to generate a stable and accurate electrical signal (such as a digital voltage value) and transmits it to the controller. After receiving the electrical signal, the controller compares it with a preset reference value, calculates the deviation of the light spot position, and controls the X-axis adjustment component and Y-axis adjustment component to adjust the position of the light source 10, forming a closed-loop control. For example, if the photosensitive unit detects that the light spot offset has caused the light intensity in a certain area to decrease, the controller will adjust the position of the light source 10 to allow more light to illuminate the area until the light intensity returns to the ideal state.

[0043] In the cold light source system of the endoscope provided in this application, the photoelectric sensor 41 realizes efficient conversion of optical signals to electrical signals through the coordinated work of the photosensitive unit and the signal processing unit, providing accurate feedback data for the closed-loop control system. The direct conversion mechanism of the photosensitive unit to the optical signal ensures that the system can detect weak changes in light intensity and achieve sub-micron level light spot position detection accuracy. This allows the control system to make extremely subtle adjustments to the optical path offset to ensure the stability of the lighting effect. The generation and collection process of photogenerated carriers is almost instantaneous (nanosecond response time), and the high-speed amplification and conditioning circuit of the signal processing unit further shortens the signal transmission delay. This fast response characteristic enables the system to track and compensate for dynamic changes in the optical path (such as light spot jitter caused by equipment vibration) in real time. The filtering and digitization operations of the signal processing unit effectively suppress environmental noise and electromagnetic interference, and improve the reliability of the electrical signal. Even in the complex electromagnetic environment of medical equipment, it can ensure that the control system accurately obtains light spot position information.

[0044] As an implementable method, Figure 2As shown, a slide groove extending along the X-axis direction is provided on the housing 70, the X-axis adjustment assembly includes a slide 51 and a first driving member 52, the light source 10 is provided on the slide 51, and the controller is electrically connected to the first driving member 52. The controller is used to control the movement of the first driving member 52, driving the slide 51 to move relative to the slide groove along the X-axis direction to correspondingly adjust the installation position of the light source 10 along the X-axis direction.

[0045] It should be noted that the slide groove serves as a guide structure, which is fixed on the housing 70 and extends along the X-axis direction. The slide groove provides a precise track for the movement of the slide 51, ensuring that the slide 51 can only move linearly in the X-axis direction, limiting the degree of freedom in other directions, thereby ensuring the accuracy of the adjustment of the light source 10. The slide 51 is a platform that carries the light source 10 and forms a sliding fit with the slide groove. The light source 10 is fixedly mounted on the slide 51, so the movement of the slide 51 directly drives the light source 10 to move in the X-axis direction. A slider 512 can be provided at the bottom of the slide 51, and the slider 512 can adopt a low-friction material or a rolling bearing structure to reduce the movement resistance and improve the sensitivity and accuracy of the adjustment.

[0046] The first driving member 52 (such as a stepper motor, a servo motor or a piezoelectric ceramic driver) serves as a power source and is electrically connected to the controller. The controller sends a control signal (such as a pulse current or voltage) to the first driving member 52 based on the light spot position deviation fed back by the photoelectric sensor 41. The first driving member 52 converts the electrical signal into mechanical motion, driving the slide 51 to move along the slide groove. For example, the stepper motor can achieve micro-step movement by precisely controlling the number of pulses, and can achieve sub-micron position control accuracy. When the system detects that the light spot is offset in the X-axis direction, the controller calculates the distance and direction that need to be adjusted, and controls the first driving member 52 to drive the slide 51 to move the corresponding distance to the left or right along the slide groove. For example, if the light spot is biased to the right, the controller will control the first driving member 52 to move the slide 51 to the left, thereby changing the position of the light source 10, adjusting the incident angle of the light, and ultimately returning the light spot to the ideal position.

[0047] As an implementable method, Figure 2 As shown, a rack 53 extending along the X-axis direction is provided on the housing 70, a gear 511 is rotatably provided on the slide 51, the gear 511 and the rack 53 are engaged, and the first driving member 52 is connected to the gear 511 for transmission. The first driving member 52 is used to drive the gear 511 to rotate, and the slide 51 is driven to move along the rack 53 through the gear 511.

[0048] It should be noted that the rack 53 is fixed to the housing 70 and extends in the X-axis direction, so that the rack 53 serves as a reference track for linear motion. The tooth structure of the rack 53 is precisely meshed with the tooth structure of the gear 511 to ensure effective force transmission and accuracy of movement. The gear 511 is mounted on the slide 51 and forms a meshing pair with the rack 53. When the first driving member 52 (such as a stepping motor) drives the gear 511 to rotate, the gear 511 rolls along the rack 53, driving the slide 51 to move linearly in the X-axis direction. Due to the characteristics of the gear 511-rack 53 transmission, the moving distance of the slide 51 is strictly linearly related to the rotation angle of the gear 511, and micron-level position control can be achieved.

[0049] The first drive member 52 can be connected to the gear 511 through a coupling or a reduction mechanism to convert the electrical signal into precise rotational motion. The controller calculates the distance that needs to be adjusted based on the light spot position deviation fed back by the photoelectric sensor 41, and controls the first drive member 52 to drive the gear 511 to rotate the corresponding angle. For example, if the light source 10 needs to be moved 0.5 mm to the left, the controller will calculate the angle that the gear 511 needs to rotate (depending on the module of the gear 511 and the pitch of the rack 53) and send a corresponding number of pulse signals to the stepper motor. Those skilled in the art should be able to achieve a larger transmission ratio by selecting an appropriate module and number of teeth of the gear 511, and convert the high speed of the motor into a low-speed, high-precision motion of the slide 51. At the same time, the gear 511 transmission can effectively amplify the torque of the motor, enabling the system to drive the heavier light source 10 assembly to move smoothly.

[0050] As an implementable method, Figure 3 As shown, the light source 10 includes a base 11 and a light source body 12 fixedly arranged on the base 11, and the Y-axis adjustment component includes a guide rod 61 and a second driving member 62. The guide rod 61 extends along the Y-axis direction, and the opposite ends of the guide rod 61 are respectively passed through the base 11 and the slide 51. The controller is electrically connected to the second driving member 62. The controller is used to control the movement of the second driving member 62, driving the base 11 to move along the guide rod 61 relative to the slide 51, so as to adjust the installation position of the light source body 12 along the Y-axis direction accordingly.

[0051] It should be noted that the guide rod 61 serves as a guiding structure, extending along the Y-axis direction and fixed on the slide 51. The two ends of the guide rod 61 are respectively passed through the base 11 and the slide 51 to form a sliding fit, providing the base 11 with a precise moving track in the Y-axis direction. This design ensures that the base 11 can only move linearly along the Y-axis, limiting the degree of freedom in other directions, thereby ensuring the accuracy of the adjustment of the light source 10. The light source body 12 is fixedly mounted on the base 11, so the movement of the base 11 directly drives the light source body 12 to move in the Y-axis direction. Low-friction materials (such as polytetrafluoroethylene) or rolling bearing structures can be used between the base 11 and the guide rod 61 to reduce movement resistance and improve the sensitivity and accuracy of adjustment.

[0052] The second driving member 62 (such as a stepper motor, a servo motor or a piezoelectric ceramic driver) serves as a power source and is electrically connected to the controller. The controller sends a control signal (such as a pulse current or voltage) to the second driving member 62 based on the light spot position deviation fed back by the photoelectric sensor 41. The second driving member 62 converts the electrical signal into mechanical motion, driving the base 11 to move along the guide rod 61. For example, the stepper motor can achieve micro-step movement by precisely controlling the number of pulses, and can achieve sub-micron position control accuracy. When the system detects that the light spot is offset in the Y-axis direction, the controller calculates the distance and direction that need to be adjusted, and controls the second driving member 62 to drive the base 11 to move up or down along the guide rod 61 a corresponding distance, thereby changing the position of the light source body 12, adjusting the incident angle of the light, and finally returning the light spot to the ideal position.

[0053] In the cold light source system of the endoscope provided in this application, the Y-axis adjustment assembly achieves precise position adjustment of the light source 10 in the Y-axis direction through the coordinated work of the guide rod 61, the second drive member 62, and the base 11. Together with the X-axis adjustment assembly, it forms a two-dimensional adjustment system, ensuring that the light spot can be accurately positioned in two dimensions, so that the light spot can be accurately positioned at any position on the light output surface of the focusing lens 40. This two-dimensional adjustment capability significantly improves the flexibility and adaptability of endoscope lighting, and can meet the precise requirements for light spot position in different inspection scenarios.

[0054] As an implementable method, Figure 3 As shown, the Y-axis adjustment assembly also includes an elastic member 63, the opposite ends of which are fixedly connected to the base 11 and the slide 51 respectively; when the second driving member 62 rotates forward, it can drive the base 11 to move toward the side close to the slide 51 and compress the elastic member 63 to store energy; when the second driving member 62 reverses, the elastic member 63 can release energy and drive the base 11 to move toward the side away from the slide 51.

[0055] It should be noted that the two ends of the elastic member 63 are firmly connected to the base 11 and the slide 51 respectively. When the second driving member 62 rotates forward, the second driving member 62 generates a driving force to drive the base 11 to move in the direction close to the slide 51. In this process, the elastic member 63 is squeezed and begins to store elastic potential energy. When the second driving member 62 reverses, the elastic member 63 that is compressed and stores energy begins to release the stored elastic potential energy, and drives the base 11 to move in the direction away from the slide 51 by its own elastic force. In this way, the second driving member 62 and the elastic member 63 cooperate with each other to achieve reciprocating motion of the base 11 in the Y-axis direction, thereby accurately adjusting the installation position of the light source body 12 in the Y-axis direction. During this process, the controller continuously controls the forward and reverse rotation of the second driving member 62 according to the light signal on the light-emitting surface of the focusing lens 40 fed back by the photoelectric sensor 41, ensuring that the position adjustment of the light source 10 can make the light spot in an ideal state.

[0056] The elastic force of the elastic member 63 provides a smooth auxiliary driving force for the movement of the base 11. During the adjustment process, the elastic member 63 can buffer the impact force that may be generated when the second driving member 62 moves, and avoid the situation where the base 11 is over-adjusted due to a sudden change in the driving force. This buffering effect makes the movement of the base 11 more stable and precise, which helps to adjust the position of the light source 10 more accurately, thereby further improving the positioning accuracy of the light spot on the focusing lens 40 and improving the clarity of endoscopic imaging. In addition, the presence of the elastic member 63 also increases the stability of the system. During the operation of the equipment, it may be subject to external vibration or impact, and the elastic member 63 can play a shock-absorbing role. When vibration occurs, the elastic member 63 can absorb part of the vibration energy, reduce the impact of the vibration on the base 11 and the light source body 12, make the position of the light source 10 more stable, reduce the possibility of light spot position deviation due to external interference, and ensure the stable operation of the endoscope lighting system.

[0057] As an implementable method, Figure 4 As shown, the dichroic filter 30 is movably connected to the housing 70. The dichroic filter 30 includes a base 31 and a dichroic filter body 32 fixedly mounted on the base 31. The housing 70 is provided with a first mounting portion 71, and the base 31 is provided with a second mounting portion 311. The second mounting portion 311 rotatably cooperates with the first mounting portion 71 to rotatably connect the base 31 to the housing 70. The base 31 is driven to rotate to adjust the mounting angle of the dichroic filter body 32 along the axis of the first mounting portion 71. In one embodiment, the first mounting portion 71 is a protrusion, and the second mounting portion 311 is a through hole that matches the protrusion; alternatively, the first mounting portion 71 is a through hole, and the second mounting portion 311 is a protrusion that matches the through hole.

[0058] It should be noted that the dichroic plate 30 and the housing 70 can be connected in a rotational manner, allowing the dichroic plate 30 to rotate relative to the housing 70. Thus, the dichroic plate 30 can change the angle between itself and the light by rotating, thereby changing the reflection and transmission path of the light on the dichroic plate 30. In the cold light source system of the endoscope provided in this application, the dichroic plate 30 will rotate in conjunction with the adjustment of the position of the light source 10, further optimizing the light path and ensuring that the light spot is accurately focused on the target area of ​​the endoscope.

[0059] The dichroic filter 30 consists of a base 31 and a dichroic body 32. The dichroic body 32 is fixed to the base 31. The base 31 rotates by cooperating with a specific structure on the housing 70, thereby adjusting the mounting angle of the dichroic body 32. Specifically, in this embodiment, a first mounting portion 71 on the housing 70 and a second mounting portion 311 on the base 31 cooperate to form a rotating connection. By rotating the base 31, the angle of the dichroic body 32 is changed, optimizing the reflection and transmission paths of light and ensuring that the light spot exits the focusing lens 40 at the optimal position.

[0060] like Figures 1 to 5 As shown, a second aspect of the embodiment of the present application provides a method for adjusting a cold light source system of an endoscope, which is applied to the cold light source system of the endoscope, and the method includes:

[0061] S01, obtaining an electrical signal emitted by the photoelectric sensor 41;

[0062] S02. Acquire the actual position of the light spot on the light-emitting surface of the focusing lens 40 according to the electrical signal, and calculate an offset according to the actual position of the light spot and a preset light-emitting position;

[0063] S03 , controlling the light source 10 to move along the X-axis direction and / or the Y-axis direction according to the offset.

[0064] It should be noted that, first, obtaining the actual position of the light spot on the light exit surface of the focusing lens 40 can be achieved by using a photoelectric sensor 41 provided on the light exit surface of the focusing lens 40. The photoelectric sensor 41 responds to the light spot and emits a corresponding electrical signal. This electrical signal carries information about the actual position of the light spot, thereby obtaining the actual position of the light spot on the light exit surface of the focusing lens 40.

[0065] Secondly, the actual position of the acquired light spot is compared with the preset light output position, and the offset between the two is calculated through a specific algorithm. This offset can accurately reflect the difference between the actual position of the light spot and the ideal position, providing a basis for subsequent adjustments.

[0066] Again, based on the calculated offset, the controller will send instructions to the X-axis adjustment component and / or Y-axis adjustment component of the light source 10 to control the movement of the first driving member 52 and / or the second driving member 62, thereby driving the light source 10 to move along the X-axis direction and / or the Y-axis direction, so that the light spot gradually approaches the preset light output position.

[0067] It should also be noted that the photoelectric sensor 41 is a key component for determining the actual position of the light spot. When the light spot strikes the light-exiting surface of the focusing lens 40, the photoelectric sensor 41 converts the optical signal into an electrical signal. Since the position of the photoelectric sensor 41 on the light-exiting surface is known, light spots at different locations will cause the photoelectric sensor 41 to generate different electrical signals. By analyzing and processing these electrical signals, the actual position of the light spot on the light-exiting surface can be accurately determined. For example, when the light spot is located on the left side of the light-exiting surface, the corresponding photoelectric sensor 41 will emit a specific electrical signal. Based on this electrical signal, the system can determine that the light spot has shifted a certain distance to the left in the X-axis direction. Through this feedback adjustment mechanism based on the photoelectric sensor 41, the endoscope's cold light source system can monitor the light spot position in real time and continuously adjust the position of the light source 10 to ensure that the light spot is always at the preset light-exiting position, thereby providing stable and accurate illumination for the endoscope and improving the quality and effectiveness of endoscopic imaging. It should be noted that the number of photoelectric sensors 41 in each quadrant can be one, two, or three, and this application does not limit the number of photoelectric sensors 41.

[0068] As an implementable method, Figure 5 As shown, with the center of the light-emitting surface of the focusing lens 40 as the origin, the light-emitting surface of the focusing lens 40 is divided into a first quadrant 81, a second quadrant 82, a third quadrant 83 and a fourth quadrant 84 along the X-axis and the Y-axis directions. A photoelectric sensor 41 is correspondingly provided in each quadrant. The offset is calculated according to the actual position of the light spot and the preset light-emitting position, including: calculating the horizontal offset according to a preset horizontal offset algorithm, and calculating the vertical offset according to a preset vertical offset algorithm, wherein ΔX=(A+C)-(B+D), ΔY=(A+B)-(C+D), ΔX is the horizontal offset, ΔY is the vertical offset, A is the current value of the first quadrant 81, B is the current value of the second quadrant 82, C is the current value of the third quadrant 83, and D is the current value of the fourth quadrant 84.

[0069] It should be noted that in the cold light source system of the endoscope provided in the present application, by dividing the light-emitting surface of the focusing lens 40 into four quadrants and combining the current values ​​of each quadrant to calculate the offset of the light spot, this method realizes the accurate quantitative analysis of the light spot position. Specifically, with the center of the light-emitting surface of the focusing lens 40 as the origin, it is divided into four quadrants along the X-axis and Y-axis directions. The detection range of the photoelectric sensor 41 covers each quadrant. When the light spot is irradiated on the light-emitting surface, the photoelectric sensor 41 will generate different current values ​​in different quadrants due to the different light intensities received. Specifically, A, B, C, and D represent the current values ​​of the first quadrant 81, the second quadrant 82, the third quadrant 83, and the fourth quadrant 84, respectively, and these current values ​​are proportional to the light intensities received in the corresponding quadrants.

[0070] The calculation principle of the preset horizontal offset algorithm (ΔX = (A + C) - (B + D)) is that when the light spot deviates horizontally, the current values ​​in the left and right quadrants will differ. For example, if the light spot deviates toward the positive X-axis direction (i.e., the right), the sum of the current values ​​in the first and third quadrants 81, 83 will be greater than the sum of the current values ​​in the second and fourth quadrants 82, 84. In this case, the calculated ΔX is positive, indicating that the light source 10 needs to be moved toward the negative X-axis direction (i.e., the left) to correct the offset.

[0071] The calculation principle of the preset vertical offset algorithm (ΔY = (A + B) - (C + D)) is that when the light spot deviates vertically, the current values ​​in the upper and lower quadrants will differ. For example, if the light spot deviates toward the positive Y-axis (i.e., upward), the sum of the current values ​​in the first and second quadrants 81, 82 will be greater than the sum of the current values ​​in the third and fourth quadrants 83, 84. In this case, ΔY is positive, indicating that the light source 10 needs to be moved toward the negative Y-axis (i.e., downward).

[0072] As an implementation method, controlling the light source 10 to move along the X-axis direction and / or the Y-axis direction according to the offset includes:

[0073] S031. Calculate a horizontal adjustment amount based on the horizontal offset and a preset horizontal adjustment algorithm, and calculate a vertical adjustment amount based on the vertical offset and a preset vertical adjustment algorithm, wherein: X norm is the horizontal adjustment amount, Y norm is the vertical adjustment amount;

[0074] S032: Control the light source 10 to move along the X-axis direction according to the horizontal adjustment amount, and / or control the light source 10 to move along the Y-axis direction according to the vertical adjustment amount.

[0075] It should be noted that the calculation principle of the preset horizontal adjustment algorithm and the preset vertical adjustment algorithm is: after the controller calculates the ΔX and ΔY values, it performs normalization processing (the denominator is the total current value) to eliminate the influence of light intensity fluctuations on the offset calculation, ensuring accurate adjustment under various lighting conditions. norm and Y norm , respectively drive the X-axis adjustment component and the Y-axis adjustment component to adjust the position of the light source 10. For example, if the calculated X norm = +0.2 (i.e., shifted to the right) and Y norm =-0.1 (ie, shifted downward), the controller will control the first driving member 52 to drive the light source 10 to move leftward, and control the second driving member 62 to drive the light source 10 to move upward until X norm and Y norm Approaching zero, the light spot returns to the preset center position.

[0076] As an implementable embodiment, there are multiple light sources 10, and controlling the light source 10 to move along the X-axis direction and / or the Y-axis direction according to the offset includes: S033, according to the lighting order of the multiple light sources 10, controlling each light source 10 to move along the X-axis direction and / or the Y-axis direction according to the offset.

[0077] It should be noted that the lighting order of the multiple light sources 10 is pre-set, and this lighting order determines the temporal logic for adjusting the multiple light sources 10. When the controller controls the first light source 10 to move along the X-axis and / or Y-axis based on the offset calculated between the actual position of the light spot formed by the first light source 10 and the preset light output position, so that the actual position of the light spot formed by the first light source 10 coincides with the preset light output position, the second light source 10 is automatically or manually lit according to the lighting order, and the above adjustment steps are repeated, so that the multiple light sources 10 can be lit and adjusted in sequence according to the lighting order.

[0078] The aforementioned method for adjusting the cold light source system of an endoscope enables automatic adjustment of the light output position of the installed endoscope cold light source, resulting in more accurate focus of the light entering the endoscope, a wider effective spot size, and improved illumination accuracy. Furthermore, during the installation of the endoscope cold light source optical components, automatic adjustment can be achieved after the installer has installed all components within the housing, significantly saving labor costs and improving efficiency.

[0079] In some examples, the adjustment method of the cold light source system of the endoscope can be executed after receiving an after-sales request, and after-sales personnel can perform adjustments remotely, reducing after-sales costs.

[0080] It should be noted that the adjustment method of the cold light source system of the endoscope provided in this embodiment is the same as the specific structure of the cold light source system of the endoscope described above. Those skilled in the art can infer the adjustment method of the cold light source system of the endoscope based on the description of the specific structure of the cold light source system of the endoscope described above, and this application will not repeat the description. Since the adjustment method of the cold light source system of the endoscope provided in this embodiment is used to prepare the cold light source system of the endoscope described above, the adjustment method of the cold light source system of the endoscope has the same beneficial effects as the cold light source system of the endoscope described above, and will not be repeated here.

[0081] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

[0082] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner unless there is any contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

Claims

1. A cold light source system for an endoscope, characterized in that: The endoscope comprises a housing and a light source, a coupling lens, a dichroic plate and a focusing lens arranged in the housing. The light emitted by the light source is converged by the coupling lens, split by the dichroic plate and focused by the focusing lens to form a light spot and then emitted to the endoscope. It also includes an X-axis adjustment component, a Y-axis adjustment component, a controller and a photoelectric sensor, and the light source is movably connected to the housing through the X-axis adjustment component and the Y-axis adjustment component; The photoelectric sensor is arranged on the focusing lens, and is used to obtain the light signal on the light-emitting surface of the focusing lens and convert the light signal into an electrical signal. The controller is electrically connected to the photoelectric sensor, and is used to control the X-axis adjustment component and / or the Y-axis adjustment component according to the electrical signal to drive the light source to move along the X-axis direction and / or the Y-axis direction.

2. The cold light source system for an endoscope according to claim 1, characterized in that: The housing is provided with a slide groove extending along the X-axis direction, the X-axis adjustment assembly includes a slide and a first driving member, the light source is arranged on the slide, the controller is electrically connected to the first driving member, and the controller is used to control the movement of the first driving member to drive the slide to move along the X-axis direction relative to the slide groove to correspondingly adjust the installation position of the light source along the X-axis direction.

3. The cold light source system for an endoscope according to claim 2, characterized in that: A rack extending along the X-axis direction is provided on the housing, a gear is rotatably provided on the slide, the gear and the rack are meshed, the first driving member is connected to the gear transmission, the first driving member is used to drive the gear to rotate, and the slide is driven to move along the rack through the gear.

4. The cold light source system for an endoscope according to claim 3, characterized in that: The light source includes a base and a light source body fixed on the base, the Y-axis adjustment assembly includes a guide rod and a second driving member, the guide rod extends along the Y-axis direction, and the opposite ends of the guide rod are respectively passed through the base and the slide, the controller is electrically connected to the second driving member, and the controller is used to control the movement of the second driving member, driving the base to move along the guide rod relative to the slide, so as to correspondingly adjust the installation position of the light source body along the Y-axis direction.

5. The cold light source system for an endoscope according to claim 4, characterized in that: The Y-axis adjustment assembly also includes an elastic member, the opposite ends of which are fixedly connected to the base and the slide respectively; when the second driving member rotates forward, it can drive the base to move toward the side close to the slide and compress the elastic member to store energy; when the second driving member rotates reversely, the elastic member can release energy and drive the base to move toward the side away from the slide.

6. The cold light source system for an endoscope according to claim 1, characterized in that: The dichroic film is movably connected to the housing. The dichroic film includes a base and a dichroic film body fixedly arranged on the base. A first mounting portion is provided on the housing, and a second mounting portion is provided on the base. The second mounting portion is rotatably matched with the first mounting portion to rotate the base and the housing. The base is driven to rotate to adjust the installation angle of the dichroic film body along the axial direction of the first mounting portion.

7. A method for adjusting a cold light source system of an endoscope, characterized in that: The cold light source system for an endoscope according to any one of claims 1 to 6, the method comprising: Acquiring an electrical signal emitted by the photoelectric sensor; Acquiring the actual position of the light spot on the light-emitting surface of the focusing lens according to the electrical signal, and calculating the offset according to the actual position of the light spot and the preset light-emitting position; The light source is controlled to move along the X-axis direction and / or the Y-axis direction according to the offset.

8. The method for adjusting the cold light source system of an endoscope according to claim 7, characterized in that: Taking the center of the light-emitting surface of the focusing lens as the origin, the light-emitting surface of the focusing lens is divided into a first quadrant, a second quadrant, a third quadrant, and a fourth quadrant along the X-axis direction and the Y-axis direction, and a photoelectric sensor is correspondingly provided in each quadrant. The offset is calculated according to the actual position of the light spot and the preset light-emitting position, and the horizontal offset is calculated according to a preset horizontal offset algorithm, and the vertical offset is calculated according to a preset vertical offset algorithm, wherein ΔX=(A+C)-(B+D), ΔY=(A+B)-(C+D), ΔX is the horizontal offset, ΔY is the vertical offset, A is the current value of the first quadrant, B is the current value of the second quadrant, C is the current value of the third quadrant, and D is the current value of the fourth quadrant.

9. The method for adjusting the cold light source system of an endoscope according to claim 8, characterized in that: Controlling the light source to move along the X-axis direction and / or the Y-axis direction according to the offset includes: The horizontal adjustment amount is calculated based on the horizontal offset and a preset horizontal adjustment algorithm, and the vertical adjustment amount is calculated based on the vertical offset and a preset vertical adjustment algorithm, wherein: X norm is the horizontal adjustment amount, Y norm is the vertical adjustment amount; The light source is controlled to move along the X-axis direction according to the horizontal adjustment amount, and / or the light source is controlled to move along the Y-axis direction according to the vertical adjustment amount.

10. The method for adjusting the cold light source system of an endoscope according to claim 7, characterized in that: There are multiple light sources, and controlling the light sources to move along the X-axis direction and / or the Y-axis direction according to the offset includes: controlling each light source to move along the X-axis direction and / or the Y-axis direction according to the offset according to the lighting order of the multiple light sources.

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