Light source module and illumination light source for endoscope

Abstract

The invention discloses a light source module and a lighting source for an endoscope, and relates to the technical field of endoscopes. The light source module comprises focus-adjustable lens assemblies in one-to-one correspondence with the target light-emitting components, and the focus-adjustable lens assemblies are located on emergent light paths of the corresponding target light-emitting components and located between the target light-emitting components and the light combining assembly. The light adjusting component is configured to adjust the focal length of the illumination light emitted by the target light-emitting component according to the received control signal so as to adjust the light quantity of the illumination light emitted by the target light-emitting component to the light combining component, so that the energy proportion of each illumination light emitted to the light combining component can be adjusted, and finally the spectrum adjustment of the combined illumination light is realized; according to the scheme, the illumination light with the specific spectrum can be quickly and accurately obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and in particular to a light source module and an illumination light source for an endoscope. Background Art

[0002] In endoscope systems, ordinary white light observation and special light observation functions have become mainstream. White light observation mode is often used for daily large-area inspections, and special light (red light, green light, blue light, ultraviolet light, or a combined beam of light mixed in a specific ratio with different colors of light) observation mode is used for early cancer screening. Different observation modes correspond to different illumination spectra. Therefore, when it is necessary to switch the observation mode, it is necessary to change the illumination spectrum emitted by the endoscope light source.

[0003] There are two related schemes for changing the illumination spectrum. The first scheme is to use at least two light-emitting elements that can emit different spectra, and adjust the driving voltage / current of each light-emitting element so that the brightness of the illumination light emitted by each light-emitting element meets a specific ratio requirement, thereby combining the light beams to form illumination light with a specific spectrum. The second scheme is to use a combination of a wide-spectrum light source and a filter wheel, and select the illumination light of the required wavelength band to be emitted through the filter wheel to obtain illumination light with a specific spectrum. However, when the first scheme is used to adjust the illumination spectrum, the spectrum is inaccurate due to the afterglow delay phenomenon of the light-emitting element, so that the required observation mode may not be accurately obtained during the switching process; when the second scheme is used to adjust the illumination spectrum, since the filter wheel requires mechanical structure switching and is mostly time-sharing imaging, the delay is high and mechanical failure is prone to occur, resulting in reduced efficiency and reliability of adjusting the illumination spectrum.

[0004] Therefore, the existing solutions for changing the lighting spectrum need to be improved. In particular, how to quickly and accurately adjust the lighting spectrum is a technical problem that people in this field need to solve urgently. Summary of the invention

[0005] The object of the present invention is to provide a light source module and an illumination light source for an endoscope, so as to solve the technical problems of low efficiency and low accuracy in adjusting the illumination spectrum.

[0006] In order to solve the above technical problems, the present invention provides a light source module, comprising: a light emitting component, a processor and a light combining component, wherein the light emitting component comprises at least two light emitting components capable of emitting different illumination spectra, and the illumination light emitted by the light emitting components is combined by the light combining component to form a combined illumination light, and the light source module further comprises: a focusable lens component corresponding to a target light emitting component one by one; the target light emitting component is any one or more of the at least two light emitting components;

[0007] The focus-adjustable lens assembly is located on the light-emitting path of the target light-emitting component and between the target light-emitting component and the light-combining component, and is configured to adjust the focal length of the illumination light emitted by the target light-emitting component according to the received control signal, so as to adjust the light amount of the illumination light of the target light-emitting component incident on the light-combining component;

[0008] The processor is connected to the focus-adjustable lens assembly and is configured to adjust a control signal of the focus-adjustable lens assembly in response to an observation mode switching instruction.

[0009] Exemplarily, the focus-adjustable lens assembly includes a deformable lens.

[0010] Exemplarily, the deformable lens is a piezoelectrically actuated deformable lens.

[0011] Exemplarily, it also includes: a collimator corresponding to each of the focus-adjustable lens assemblies, and the collimator is located between the corresponding focus-adjustable lens assembly and the light combining assembly.

[0012] Exemplarily, a light blocking plate is disposed on the periphery of the collimator to block stray light that is not coupled into the collimator from leaking to the light combining component.

[0013] Exemplarily, at least two of the target light-emitting components are arranged on the same side of the light-combining component, and the collimators corresponding to the target light-emitting components located on the same side of the light-combining component are embedded in the same light-blocking plate.

[0014] Exemplarily, the light emitting component emits parallel light.

[0015] Exemplarily, the light emitting component includes at least two of a red light emitting component, an amber light emitting component, a green light emitting component, a blue light emitting component, and an ultraviolet light emitting component;

[0016] or,

[0017] The light emitting assembly comprises a white light emitting component and a narrow band light emitting component.

[0018] Exemplarily, the processor is also connected to each of the light-emitting components, and is configured to adjust the driving signal of each of the light-emitting components in response to a brightness adjustment instruction.

[0019] In order to solve the above technical problems, the present invention also provides an illumination light source for an endoscope, comprising the above light source module.

[0020] The light source module provided by the present invention can adjust the amount of illumination light incident on the light-combining component by the target light-emitting component through the adjustable focus lens assembly arranged between the target light-emitting component and the light-combining component, thereby adjusting the energy ratio of each illumination light incident on the light-combining component, and finally realizing the spectrum adjustment of the combined illumination light. Compared with the previous method of combining the illumination light with a specific spectrum by changing the driving voltage / current of each light-emitting element, the light source module provided by the present invention adjusts the amount of light coupled to the light-combining component by changing the coupling efficiency of the target light-emitting component based on the adjustable focus lens assembly, without changing the driving signal of the target light-emitting component, and is therefore not affected by the afterglow delay phenomenon of the light-emitting component, so that the spectrum can be accurately obtained to realize the required observation mode; compared with the previous method of using a wide-spectrum light source and a filter wheel combination to obtain illumination light of a specific spectrum, in the light source module provided by the present invention, after the adjustable focus lens assembly receives the driving signal, the lens focal length will change immediately in a short time, so that the energy ratio of each light-emitting component entering the light-combining component changes rapidly, thereby realizing the rapid adjustment of the spectrum. It can be seen that the present invention realizes the rapid and accurate acquisition of illumination light of a specific spectrum.

[0021] In addition, the present invention also provides an illumination light source for an endoscope, which has the same or corresponding technical features as the light source module mentioned above, and has the same effects as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of a light source module provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of a focus-adjustable lens assembly including a driver provided in an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of a light source module provided by an embodiment of the present invention;

[0026] Figure 4 A working principle diagram of a deformable lens provided by an embodiment of the present invention;

[0027] Figure 5 A flow chart of a signal control method provided by an embodiment of the present invention;

[0028] Figure 6A timing diagram of white light and special light imaging provided by an embodiment of the present invention;

[0029] Figure 7 Another timing diagram of white light and special light imaging provided by an embodiment of the present invention.

[0030] The figure numbers are as follows: 1 is a processor, 2 is a light combining component, 3 is a light emitting component, 4 is a focusable lens assembly, 5 is a driver, 6 is a common lens, 7 is a collimating lens group, 8 is a deformable lens group, 9 is a collimator group, and 10 is a beam combining filter group. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The core of the present invention is to provide a light source module and an illumination light source for an endoscope, which can solve the technical problems of low efficiency and low accuracy in adjusting the illumination spectrum.

[0033] In endoscope systems, it has become mainstream to have both ordinary white light observation and special light observation functions. The white light observation mode is commonly used for daily large-area inspections, and the special light observation mode is used for early cancer screening. Different observation modes correspond to different illumination spectra. Therefore, when it is necessary to switch the observation mode, it is necessary to change the illumination spectrum emitted by the endoscope light source. In order to quickly and accurately obtain illumination light of a specific spectrum, the embodiment of the present invention uses a focus-adjustable lens assembly to change the coupling efficiency of each light-emitting component, thereby adjusting the illumination spectrum.

[0034] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] Figure 1 A schematic diagram of a light source module provided by an embodiment of the present invention, such as Figure 1 As shown, the light source module includes: a light emitting component, a processor 1, and a light combining component 2. The light emitting component includes at least two light emitting components 3 that can emit different illumination spectra. The illumination light emitted by the light emitting components 3 is combined by the light combining component 2 to form a combined illumination light. The light source module also includes: a focusable lens component 4 corresponding to the target light emitting components one by one; the target light emitting component is any one or more of the at least two light emitting components 3.

[0036] The focus-adjustable lens assembly 4 is located on the light-emitting path of the target light-emitting component and between the target light-emitting component and the light-combining assembly 2, and is configured to adjust the focal length of the illumination light emitted by the target light-emitting component according to the received control signal, so as to adjust the light amount of the illumination light incident on the light-combining assembly 2 from the target light-emitting component;

[0037] The processor 1 is connected to the focus-adjustable lens assembly 4 and is configured to adjust a control signal of the focus-adjustable lens assembly 4 in response to an observation mode switching instruction.

[0038] When using the special light observation mode for early cancer screening, observation is performed using a combined beam of red light, green light, blue light, ultraviolet light or light of different colors mixed in a specific proportion. Therefore, it is necessary to emit light-emitting components with different illumination spectra. For example, the light-emitting components are red light emitting diodes (LED) / lasers and green LEDs / lasers. There is no limitation on the number of light-emitting components included in the light-emitting component, as long as the light-emitting component includes at least two light-emitting components that can emit different illumination spectra. Exemplarily, the light-emitting component may include at least two of a red light-emitting component, an amber light-emitting component, a green light-emitting component, a blue light-emitting component and an ultraviolet light-emitting component; alternatively, the light-emitting component may also include a white light-emitting component and a narrow-band light-emitting component; in practical applications, it may depend on the type of imaging mode to be achieved. Compared to the method of combining a wide-spectrum light source with a filter wheel and selecting the illumination light of the required wavelength band to be emitted through the filter wheel, in the embodiment of the present invention, a light-emitting component that can directly emit a specific illumination spectrum is selected in the light-emitting assembly. There is no mechanical structure switching of the filter wheel and time-sharing imaging, which greatly simplifies the structure of the light source module and improves the efficiency of obtaining illumination light of a specific spectrum.

[0039] In implementation, there may be multiple light-emitting components, but when adjusting the illumination spectrum of the combined light beam emitted by the light source module, it may be necessary to only adjust the energy ratio of the illumination light emitted by some light-emitting components in the combined light beam. Therefore, in the embodiment of the present invention, the light-emitting component whose energy ratio is to be adjusted is referred to as a target light-emitting component. In order to adjust the energy ratio of the illumination light emitted by the target light-emitting component in the combined light beam, a corresponding adjustable-focus lens assembly is provided on the light output path of the target light-emitting component. The target light-emitting component is any one or more of the at least two light-emitting components. For example, in a light source module including a white light-emitting component and a narrow-band light-emitting component, when switching the illumination mode, it may be necessary to only adjust the light output ratio of the narrow-band light-emitting component. In this case, a adjustable-focus lens assembly may be provided only on the light output path of the narrow-band light-emitting component.

[0040] In order to reduce the divergence of the light beam and improve the accuracy of light quantity control, in some embodiments, the light emitting component emits parallel light. The light emitting component may specifically include a light emitting element and a collimating lens, and the collimating lens collimates the illumination light emitted by the light emitting element into parallel light. The collimating lens group is located between the target light emitting element and the focusable lens assembly, and corresponds to the target light emitting element one by one. It should be noted that in the embodiments of the present invention, unless otherwise specified, corresponding optical devices are arranged on the output light path of the light emitting component.

[0041] There is no limitation on the focusable lens assembly, as long as the focusing effect can be achieved. For example, the focusable lens group includes a deformable lens. Among them, since the piezoelectrically actuated deformable lens has a faster response speed, the use of a piezoelectrically actuated deformable lens can improve the real-time performance of switching lighting modes. Alternatively, with the help of a linear direct drive (such as a voice coil drive), an ordinary lens can be used on the drive as a focusable lens group. The position of the ordinary lens is changed by the displacement provided by the drive, and ultimately the purpose of changing the light energy entering the light combining component is achieved. The linear direct drive can provide a stroke of several millimeters to several centimeters, which can well meet the needs of this device.

[0042] Furthermore, in order to improve the accuracy of spectral adjustment, in some embodiments, the light source module also includes a collimator corresponding to the focusable lens assembly one by one, and the collimator is located between the corresponding focusable lens assembly and the light combining assembly.

[0043] In order to further improve the accuracy of the spectrum, a light shield is provided on the periphery of the collimator to prevent stray light that is not coupled into the collimator from leaking into the light combining component and affecting the accuracy of the spectrum. Each collimator can be embedded in a light shield. The present invention does not limit the position of the light shield. In order to better prevent stray light from entering the light combining component, the light shield is provided between the incident end and the exit end of the collimator.

[0044] In some embodiments, at least two target light emitting components are arranged on the same side of the light combining component, and the collimators corresponding to the target light emitting components on the same side of the light combining component are embedded in the same light shielding plate. In this way, the structure in the light source module can be made more compact.

[0045] The processor is connected to the focusable lens assembly, and in each observation mode, the control signal of the focusable lens assembly is adjusted, so that the focusable lens assembly adjusts the focal length of the illumination light emitted by the target light-emitting component according to the received control signal, so as to adjust the amount of illumination light incident on the light-combining component by the target light-emitting component. If the focusable lens assembly is a deformable lens, the processor is directly connected to the deformable lens, and the focus of the deformable lens can be controlled according to the corresponding control signal, so as to adjust the amount of illumination light incident on the light-combining component by the target light-emitting component, thereby realizing the adjustment of the illumination spectrum; and if the focusable lens assembly is composed of a linear direct driver and an ordinary lens, the processor is connected to the driver, and the control signal given by the processor acts on the driver. Figure 2 A schematic diagram of a focus-adjustable lens assembly including a driver provided in an embodiment of the present invention is shown in FIG. Figure 2 As shown, the lens assembly includes a driver 5 and a common lens 6 located on the driver. When the user selects the observation mode, the processor 1 sends a control signal and acts on the driver 5. According to the control signal, the driver 5 is controlled to provide a specified displacement for the common lens 6, such as Figure 2 In the process, the light source moves from position 1 to position 2 to reach the target focus position, thereby adjusting the amount of illumination light from the target light-emitting component incident on the light-combining component 2 to achieve the adjustment of the illumination spectrum.

[0046] In summary, it can be seen that the light source module provided by the present invention can adjust the amount of illumination light incident on the light-combining component by the target light-emitting component and the light-combining component through the adjustable focus lens component, thereby adjusting the energy ratio of each illumination light incident on the light-combining component, and finally realizing the spectrum adjustment of the combined illumination light. Compared with the previous method of combining the illumination light with a specific spectrum by changing the driving voltage / current of each light-emitting element, the light source module provided by the present invention adjusts the amount of light coupled to the light-combining component by changing the coupling efficiency of the target light-emitting component based on the adjustable focus lens component, without changing the driving signal of the target light-emitting component, and is therefore not affected by the afterglow delay phenomenon of the light-emitting component, so that the spectrum can be accurately obtained to realize the required observation mode; compared with the previous method of using a wide-spectrum light source and a filter wheel combination to obtain illumination light of a specific spectrum, in the light source module provided by the present invention, after the adjustable focus lens component receives the driving signal, the lens focal length will change immediately in a short time, so that the energy ratio of each light-emitting component entering the light-combining component changes rapidly, thereby realizing the rapid adjustment of the spectrum. It can be seen that the present invention realizes the rapid and accurate acquisition of illumination light of a specific spectrum.

[0047] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention will be further described in detail in conjunction with the accompanying drawings and specific embodiments. The light source module provided by the present invention is described by taking four light-emitting elements, each of which corresponds to a collimating lens, a deformable lens, a collimator, and a light-combining filter as an example, wherein it can be understood that the light-emitting element can be any device that provides an illumination light beam of a given illumination spectrum, and the light-emitting component described in the embodiment of the present invention can include a light-emitting element and its corresponding collimating lens. Figure 3 A schematic diagram of a light source module provided by an embodiment of the present invention, such as Figure 3 As shown, the light beams emitted by each light emitting element pass through the corresponding collimating lens, deformable lens, and collimator in sequence and then enter the light combining filter. The light beams emitted by all the light emitting elements are combined into a multi-spectrum combined light through the light combining filter. Figure 3 The four collimating lenses in the image are called collimating lens group 7, the four deformable lenses are called deformable lens group 8, the four collimators are called collimator group 9, and the four light combining filters are called light combining filter group 10 (i.e., light combining assembly). Each collimator is provided with a light blocking plate. Figure 3 In the light source module, each collimator is embedded in the corresponding light blocking plate. In practice, since each light-emitting component is arranged on the same side of the light-combining filter group 10, the collimators corresponding to the light-emitting components on the same side of the light-combining filter group 10 can be embedded in the same light blocking plate. In order to obtain the required observation mode, the control signal applied to each deformable lens can be changed to change the light energy entering each collimator. In practice, a corresponding drive list signal (voltage / current) can be set for each deformable lens according to different observation modes, wherein the drive signal list can be obtained according to the coupling relationship of each device in the system (such as a processor, a light source, a mirror body, etc.). By changing the focal length of each deformable lens separately, the light energy entering the collimator is changed, and then the light energy entering the light-combining filter group 10 is changed. By adjusting the brightness ratio of the light emitted by each light-emitting component through the deformable lens and the collimating device, different spectra can be formed.

[0048] In practical applications, the processor can first read the drive list signal (voltage / current) of the light-emitting component according to the image brightness requirements, so that the four light-emitting components reach the preset brightness to meet different lighting brightness requirements. Then the spectrum is adjusted by controlling the drive signal of each deformable lens. The light emitted by the light-emitting component enters the collimator after passing through the deformable lens. By adjusting the focal length of the deformable lens, the light coupling efficiency is changed to adjust the amount of light entering the collimator; after the light passes through the collimator, a beam-combining filter is used to synthesize a multi-spectrum. Among them, a light baffle can be installed on the collimator group (specifically, it can be between the incident end and the output of the collimator) to prevent stray light that is not coupled into the collimator from entering the beam-combining filter and affecting the accuracy of the spectrum.

[0049] Figure 4 A working principle diagram of a deformable lens provided by an embodiment of the present invention, such as Figure 4 As shown, the deformable lens group 8 is placed at position D0. The curvature radius of the deformable lens group 8 can be changed under the action of different electrical signals. By changing the curvature radius, the focal positions are respectively located at F1, F2, and F3. When the focus is at position F1, only a small amount of stray light enters the collimator group 9; when the focus is at position F2, parallel light is focused and enters the collimator group 9. When the focus is at position F3, part of the energy enters the collimator group 9.

[0050] In addition to adjusting the illumination spectrum according to the variable focus lens assembly described above, in actual applications, in certain observation modes, the observation brightness cannot meet the requirements. Therefore, the brightness of the light-emitting component can also be adjusted. The processor 1 is also connected to each light-emitting component 3, and is configured to adjust the drive signal of each light-emitting component 3 in response to a brightness adjustment instruction. In order to obtain the drive signal of each light-emitting component 3, a relationship table between the brightness level of each light-emitting component 3 and the corresponding drive signal can be established in advance. After determining the brightness level, the corresponding drive signal can be obtained through the relationship table. By adjusting the brightness of the light-emitting component 3, the brightness of the lighting can meet the requirements as much as possible.

[0051] A light source module is described above. This embodiment also provides an endoscope illumination light source, including the above-mentioned light source module. The embodiment of the light source module has been described above, and the embodiment of the endoscope illumination light source is not described in detail here. Only the control method of the endoscope illumination light source is described here.

[0052] Figure 5 A flow chart of a signal control method provided by an embodiment of the present invention is as follows: Figure 5 As shown, the method includes:

[0053] S10: responding to a switching mode instruction (i.e., an observation mode switching instruction);

[0054] S11: The control unit reads a list of deformable lens driving signals according to the mode;

[0055] S12: The focal length of the deformable lens changes according to the driving signal;

[0056] S13: The brightness ratio entering the collimator changes; and the process proceeds to step S18;

[0057] S14: responding to the brightness switching instruction;

[0058] S15: The control unit reads a list of driving signals of the light-emitting components according to the brightness level;

[0059] S16: The brightness of the light-emitting component changes;

[0060] S17: The brightness entering the collimating device changes;

[0061] S18: Change in the spectrum / intensity of the illumination at the front end of the mirror;

[0062] S19: Image sensor imaging;

[0063] S20: The image processing unit processes the image of the sensor for display.

[0064] When the user switches the observation mode, the control unit in the processor 1 reads the drive signal list of the mode, and the deformable lens changes the focal length according to the drive signal. When the focal length of the deformable lens changes, the light energy entering the collimating device increases / decreases, and the spectrum of the illumination at the front end of the mirror body changes. When the user switches the brightness level, the brightness of the light-emitting component 3 increases / decreases to the same extent, and the illumination brightness of the mirror body changes. The image sensor (such as a complementary metal oxide semiconductor (CMOS) image sensor) performs photoelectric conversion on the received light signal to form an image signal; further, the image signal is processed in the image processing unit for display. In the embodiment of the present invention, the focal length is changed by the deformable lens according to the drive signal, and the illumination spectrum can be switched quickly and accurately without a mechanical structure.

[0065] During medical examinations, displaying white light images and special light images simultaneously helps doctors make diagnoses and screening. This solution is used for the observation of white light and special light on the same screen. During the exposure interval of the image sensor, the lens group is controlled to switch the focal length, and the illumination spectrum at the front end of the lens body is changed to achieve alternating imaging of white light images and special light image frames. After being processed by the image processing unit, the simultaneous observation of white light images and special light images is finally achieved. Figure 6 A timing diagram of white light and special light imaging provided by an embodiment of the present invention. Figure 6 The medium white light image and the special light 1 image frames are formed alternately. Figure 7 Another timing diagram of white light and special light imaging provided by an embodiment of the present invention. Figure 7 In the process, white light images and special light 2 images are alternately formed.

[0066] The illumination light source for endoscope provided by the present invention includes the light source module in the above-mentioned embodiment, so that illumination light of a specific spectrum can be obtained quickly and accurately, thereby realizing the corresponding observation mode quickly and accurately; in addition, the present invention can also adjust the spectrum by adjusting the variable-focus lens assembly and adjust the illumination intensity by changing the driving signal of the light-emitting component to meet the needs of actual inspection; by alternately imaging white light images and special light images and displaying them at the same time, it helps doctors to diagnose and screen and improves the efficiency of detection.

[0067] The above is a detailed introduction to a light source module and an illumination light source for an endoscope provided by the present invention. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0068] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A light source module, comprising: A light-emitting component, a processor (1) and a light-combining component (2), wherein the light-emitting component comprises at least two light-emitting components (3) capable of emitting different illumination spectra, and the illumination light emitted by the light-emitting components (3) is combined by the light-combining component (2) to form a combined illumination light, characterized in that the light source module further comprises: a focusable lens component (4) corresponding one-to-one to a target light-emitting component; the target light-emitting component is any one or more of the at least two light-emitting components (3); The focus-adjustable lens assembly (4) is located on the light-emitting path of the target light-emitting component and between the target light-emitting component and the light-combining assembly (2), and is configured to adjust the focal length of the illumination light emitted by the target light-emitting component according to a received control signal, so as to adjust the light quantity of the illumination light incident on the light-combining assembly (2) from the target light-emitting component; The processor (1) is connected to the focus-adjustable lens assembly (4) and is configured to adjust a control signal of the focus-adjustable lens assembly (4) in response to an observation mode switching instruction.

2. The light source module according to claim 1, characterized in that: The focus-adjustable lens assembly (4) comprises a deformable lens.

3. The light source module according to claim 2, characterized in that: The deformable lens is a piezoelectrically actuated deformable lens.

4. The light source module according to claim 1, characterized in that: Also includes: A collimator corresponding one to one with the focusable lens assembly (4), the collimator being located between the corresponding focusable lens assembly (4) and the light combining assembly (2).

5. The light source module according to claim 4, characterized in that: A light blocking plate is arranged on the periphery of the collimator to block stray light that is not coupled into the collimator from leaking to the light combining component (2).

6. The light source assembly according to claim 5, characterized in that: At least two of the target light-emitting components are arranged on the same side of the light-combining component (2), and the collimators corresponding to the target light-emitting components located on the same side of the light-combining component (2) are embedded in the same light-blocking plate.

7. The light source module according to claim 1, characterized in that: The light emitting component (3) emits parallel light.

8. The light source module according to claim 1, characterized in that: The light emitting assembly includes at least two of a red light emitting component, an amber light emitting component, a green light emitting component, a blue light emitting component and an ultraviolet light emitting component; or, The light emitting assembly comprises a white light emitting component and a narrow band light emitting component.

9. The light source module according to any one of claims 1 to 8, characterized in that: The processor (1) is also connected to each of the light-emitting components (3) and is configured to adjust the drive signal of each of the light-emitting components (3) in response to a brightness adjustment instruction.

10. An illumination light source for an endoscope, characterized in that: A light source module comprising any one of claims 1 to 9.

Images