Multispectral cold light source device and endoscope system

Abstract

The embodiment of the utility model provides a multispectral cold light source device and an endoscope system, and relates to the technical field of endoscope light sources. The multispectral cold light source device comprises a light path module, a light source module and a light guide plug. The light path module comprises a light source lens assembly, a light guide plug lens assembly, a dichroscope and a shell. A light source and a dichroscope can be arranged according to needs, so that needed narrow-band light is generated. The lens assembly is connected to the shell through the threads, and when the lens assembly is rotated, the position of the lens assembly is finely adjusted, so that light is focused to a proper position, and different optical fibers can be adapted.

Description

Technical Field

[0001] The present application relates to the technical field of endoscope light sources, and in particular to a multi-spectral cold light source device and an endoscope system. Background Art

[0002] A medical endoscope cold light source is a medical device used in endoscopic diagnosis, treatment or surgery to provide illumination for the field of view of the endoscope when observing the human body cavity.

[0003] Compared with general white light imaging, the narrow-band light imaging used by endoscopes is beneficial for enhancing the image of the gastrointestinal mucosal blood vessels. For some lesions accompanied by microvascular changes, narrow-band light imaging has obvious advantages over ordinary white light imaging.

[0004] Narrowband imaging requires a narrowband light source, but suppliers of narrowband light sources are limited, and existing sources cannot meet the adaptive dimming requirements of narrowband imaging applications. Furthermore, in endoscopes, light is typically transmitted via optical fibers, requiring precise focusing of the light source to enter the fiber.

[0005] Therefore, how to design a narrow-band light source suitable for endoscopes is a technical problem that needs to be solved. Utility Model Content

[0006] The purpose of the present application is to provide a multi-spectral cold light source device and an endoscope system to solve the technical problem in the prior art of how to design a narrow-band light source suitable for an endoscope.

[0007] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions.

[0008] In a first aspect, an embodiment of the present application provides a multi-spectral cold light source device, comprising: an optical path module, a light source module, and a light guide plug;

[0009] The optical path module includes a light source lens assembly, a light guide plug lens assembly, a dichroic mirror and a housing; the light source lens assembly and the light guide plug lens assembly are both provided with threads; the light guide plug is used to connect the optical fiber;

[0010] The housing is provided with a light source lens assembly mounting hole, a light guide plug lens assembly mounting hole, and a dichroic mirror mounting groove; the light source lens assembly is connected to the light source lens assembly mounting hole via a thread, the light guide plug lens assembly is connected to the light guide plug lens assembly mounting hole via a thread, and the dichroic mirror is installed in the dichroic mirror mounting groove;

[0011] The light from the light source module is transmitted by the light source lens assembly, transmitted or reflected by the dichroic mirror, and transmitted by the light guide plug lens assembly, and is converged into a point light source;

[0012] When the light source lens assembly or the light guide plug lens assembly is rotated, the convergence point of the emergent light of the lens assembly changes.

[0013] Optionally, the light source module includes an ultraviolet LED, a blue LED, a green LED, an amber LED and a red LED.

[0014] Optionally, the dichroic mirror includes a first dichroic mirror, a second dichroic mirror, a third dichroic mirror and a fourth dichroic mirror; the light source lens assembly includes a first light source lens assembly, a second light source lens assembly, a third light source lens assembly, a fourth light source lens assembly and a fifth light source lens assembly;

[0015] The light of the ultraviolet LED is transmitted through the first light source lens assembly, the first dichroic mirror, the second dichroic mirror, the third dichroic mirror, the fourth dichroic mirror and the light guide plug lens assembly to reach the light guide plug;

[0016] The blue LED reaches the light guide plug after being transmitted through the second light source lens assembly, reflected by the first dichroic mirror, and transmitted through the second dichroic mirror, the third dichroic mirror, the fourth dichroic mirror, and the light guide plug lens assembly;

[0017] The green LED reaches the light guide plug after being transmitted through the third light source lens assembly, reflected by the second dichroic mirror, and transmitted through the third dichroic mirror, the fourth dichroic mirror, and the light guide plug lens assembly;

[0018] The amber LED reaches the light guide plug after being transmitted through the fourth light source lens assembly, reflected by the third dichroic mirror, and transmitted through the fourth dichroic mirror and the light guide plug lens assembly;

[0019] The red LED reaches the light guide plug after being transmitted through the fifth light source lens assembly, reflected by the fourth dichroic mirror, and transmitted through the light guide plug lens assembly.

[0020] Optionally, the light source module is provided with heat dissipation fins, and the heat dissipation fins are provided on the non-light-emitting surface of the light source module.

[0021] Optionally, the light source module is provided with a cooling module.

[0022] Optionally, the light source lens assembly and / or the light guide plug lens assembly includes a first lens, a second lens, a gasket, a pressure ring, and a lens barrel;

[0023] The outer side of the lens barrel is provided with an external thread, and the external thread is connected to the mounting hole of the housing;

[0024] A coaxial first hole, a second hole, and a threaded hole are sequentially provided on the inner side of the lens barrel, and the inner diameter of the first hole is smaller than the inner diameter of the second hole;

[0025] The first lens is installed in the first hole, the second lens is installed in the second hole, the washer is installed in contact with the first lens and the second lens, and the pressure ring is arranged in the threaded hole through a thread and contacts the second lens.

[0026] Optionally, the multi-spectral cold light source device includes a fixing member, and the fixing member includes a head end portion and a threaded portion;

[0027] The housing is provided with a screw hole, the screw hole is connected to the threaded portion, and the head end portion presses against the dichroic mirror in the dichroic mirror mounting groove.

[0028] Optionally, the head end can produce a certain deformation after being subjected to force.

[0029] Optionally, the dichroic mirror mounting groove passes through two sides of the housing, and each dichroic mirror is fixed by a plurality of fixing members.

[0030] In a second aspect, an embodiment of the present application provides an endoscope system, which includes an optical fiber, an endoscope, and the multi-spectral cold light source device of the first aspect; the light guide plug is connected to the optical fiber, and the optical fiber is connected to the endoscope.

[0031] Compared with the prior art, this application has the following beneficial effects:

[0032] In the multi-spectral cold light source device provided in the embodiments of the present application, a dichroic mirror can transmit and reflect light of specific wavelengths, thereby forming narrowband light. The light source and dichroic mirror can be arranged as needed to produce the desired narrowband light. The lens assembly is connected to the housing via threads. When the lens assembly is rotated, the position of the lens assembly is fine-tuned, the light emitted by each lens changes, and the convergence point of the light emitted by the lens assembly changes. In other words, through fine-tuning, the light can be ultimately focused to the appropriate position. This adapts to different optical fibers. The optical path module, light source module, and light guide plug can be assembled separately and then installed into the cold light source device, achieving modular assembly and easy disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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 paying any creative work.

[0034] Figure 1 A schematic diagram of a multi-spectral cold light source device provided in an embodiment of the present application;

[0035] Figure 2 A schematic diagram of the positional relationship of the optical components of a multi-spectral cold light source device provided in an embodiment of the present application;

[0036] Figure 3 A schematic cross-sectional view of a light source lens assembly / light guide plug lens assembly provided in an embodiment of the present application;

[0037] Figure 4 A schematic diagram of a housing provided in an embodiment of the present application, and the arrangement of fixing members and dichroic mirror mounting slots on the housing;

[0038] Figure 5 A partial view of a fixing member abutting and fixing a dichroic mirror provided in an embodiment of the present application;

[0039] Figure 6 A schematic diagram of a cooling module provided in an embodiment of the present application;

[0040] Figure 7 A schematic diagram of a connecting arm, a positioning hole, and a guide groove provided in a housing according to an embodiment of the present application;

[0041] Figure 8 A schematic diagram of the installation of an optical path module and a light source module provided in an embodiment of the present application.

[0042] Description of reference numerals:

[0043] 1 Light source module

[0044] 2 Light guide plugs

[0045] 3 Light source lens assembly

[0046] 4 Light guide plug lens assembly

[0047] 5 Dichroic Mirror

[0048] 51 First dichroic mirror

[0049] 52 Second dichroic mirror

[0050] 53 Third dichroic mirror

[0051] 54 Fourth dichroic mirror

[0052] 6 Housing

[0053] 7. First lens

[0054] 8 Second lens

[0055] 9 washers

[0056] 10 Pressure ring

[0057] 11. Lens barrel

[0058] 12 dichroic mirror mounting slots

[0059] 13 screw holes

[0060] 14 Fixing parts

[0061] 15 LED fixed position

[0062] 16 cooling fins

[0063] 17 Fan module

[0064] 18 Connecting Arm

[0065] 19 positioning holes

[0066] 20 guide groove

[0067] 21 Positioning column

[0068] 22 guide block

[0069] 23 screws DETAILED DESCRIPTION

[0070] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. The described embodiments are part of the embodiments of the present application, but not all of the embodiments. Generally, the components of the embodiments of the present application described in the drawings herein can be arranged and designed in various different configurations.

[0071] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is claimed, but rather merely represents selected embodiments of the present application. All other embodiments derived by persons of ordinary skill in the art based on the embodiments in this application without creative effort are intended to fall within the scope of protection of this application. The following embodiments and features therein may be combined with each other unless there is a conflict.

[0072] In the description of this application, it should be noted that relational terms such as first and second are used solely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. "Connection" should be understood broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0073] See Figure 1 The embodiment of the present application provides a multi-spectral cold light source device, comprising: an optical path module, a light source module 1 and a light guide plug 2. The optical path module comprises a light source lens assembly 3, a light guide plug lens assembly 4, a dichroic mirror 5 and a housing 6.

[0074] Both the light source lens assembly 3 and the light guide plug lens assembly 4 are provided with external threads. The housing 6 is provided with mounting holes for the light source lens assembly and the light guide plug lens assembly. The light source lens assembly 3 is threadedly connected to the mounting hole, and the light guide plug lens assembly 4 is threadedly connected to the mounting hole. Both the light source lens assembly 3 and the light guide plug lens assembly 4 are also provided with adjustment rings. By rotating the adjustment rings, the position of the lens assembly in the mounting hole can be quickly adjusted. The outer surface of the adjustment ring can be designed in a variety of patterns, such as toothed, corrugated, or concave.

[0075] The housing 6 is provided with a dichroic mirror mounting groove, and the dichroic mirror 5 is mounted in the dichroic mirror mounting groove.

[0076] The light source module can be configured with LEDs of different colors as needed, along with corresponding dichroic mirrors, to produce the desired narrowband light. The light source module includes a multi-channel PWM high-power driver, and adaptive dimming is achieved with the help of control software and online upgrade software.

[0077] The light source module 1 and light guide plug 2 can be spaced apart from the housing 6. This space allows access to the lens assembly's adjustment ring, enabling quick external adjustment of the lens assembly. The multi-spectral cold light source device forms the following optical path: light from the light source module 1 is transmitted through the light source lens assembly 3, transmitted or reflected by the dichroic mirror 5, and transmitted by the light guide plug lens assembly 4, converging into a point light source.

[0078] Since the light source lens assembly 3 and the light guide plug lens assembly 4 are both connected to the housing 6 by threads, when the light source lens assembly 3 is rotated, the position of the light source lens assembly 3 is fine-adjusted, and when the light guide plug lens assembly 4 is rotated, the position of the light guide plug lens assembly 4 is fine-adjusted. The output light of each lens changes with the position fine-tuning, resulting in the final change of the convergence point of the output light of the light guide plug lens assembly 4, that is, through fine-tuning, the light can eventually be focused to the appropriate position, which can adapt to different optical fibers.

[0079] Figure 2 The relative positions of an LED, lens, and dichroic mirror are shown. Light source module 1 can include a UV LED, a blue LED, a green LED, an amber LED, and a red LED. These five colors of LED can cover a wider range of narrowband light requirements, providing endoscopes with a variety of different spectral illumination for identifying and displaying tissue cells.

[0080] Each LED has an independent light source lens assembly, so that the output light of each LED can be adjusted to achieve the required convergence effect.

[0081] like Figure 2 The ultraviolet LED can be arranged to face the light guide plug lens. The blue, green, amber, and red LEDs can be arranged to face one side of the light guide plug lens, for example, with the LED light emission direction perpendicular to the axis of the light guide plug lens. Correspondingly, a dichroic mirror 5 can be arranged to include a first dichroic mirror 51, a second dichroic mirror 52, a third dichroic mirror 53, and a fourth dichroic mirror 54.

[0082] The first dichroic mirror 51 transmits ultraviolet light and reflects blue light; the second dichroic mirror 52 transmits ultraviolet and blue light and reflects green light; the third dichroic mirror 53 transmits green, ultraviolet, and blue light and reflects amber light; and the fourth dichroic mirror 54 transmits amber, green, ultraviolet, and blue light and reflects red light. The light source lens assembly converges the divergent light emitted by the LED into parallel light. The dichroic mirror reflects the corresponding wavelength spectrum at a 45-degree angle, while allowing direct transmission of other wavelengths. Finally, the light is converged into a point light source and transmitted to the light guide plug.

[0083] Each light source lens assembly 3 and light guide plug lens assembly 4 can be configured with a similar structure, and each light source lens assembly 3 and light guide plug lens assembly 4 can include two lenses. Each light source lens assembly 3 can be the same or different.

[0084] Figure 3 An embodiment of a light source lens assembly 3 or a light guide plug lens assembly 4 is shown, including a first lens 7, a second lens 8, a gasket 9, a pressure ring 10, and a lens barrel 11. Figure 3 It is a schematic diagram of a plane section along the central axis.

[0085] The outside of the lens barrel 11 is provided with an external thread, which is used to connect to the mounting hole of the housing 6. The outside of the lens barrel 11 is also provided with an adjustment ring, through which the installation position of the lens assembly can be quickly adjusted externally.

[0086] Figure 3 In the embodiment, the inner side of the lens barrel 11 is arranged from bottom to top in the order of the first lens 7, the second lens 8, the washer 9, and the pressure ring 10. Correspondingly, the inner side of the lens barrel 11 is provided with a coaxial first hole, a second hole, and a threaded hole. The inner diameter of the first hole is smaller than the inner diameter of the second hole. The first lens 7 is mounted in the first hole, and the second lens 8 is mounted in the second hole. The washer 9 is abutted and mounted between the first lens 7 and the second lens 8. The pressure ring 10 is threadedly disposed in the threaded hole and abuts against the second lens 8. In some embodiments, the inner surface of the pressure ring 10 is also provided with a reflective coating.

[0087] The outer shape of the housing 6 may be square, such as Figure 4A dichroic mirror mounting groove 12 can be opened on the side of the shell 6. The number and thickness of the dichroic mirror mounting groove 12 correspond to the dichroic mirror. The dichroic mirror mounting groove 12 passes through the cavity inside the shell 6 and the outer surface of the shell 6. The dichroic mirror can be installed from the dichroic mirror mounting groove 12.

[0088] The dichroic mirror mounting groove 12 may penetrate two opposite surfaces of the housing 6 , so that the dichroic mirror can be installed from either side, facilitating installation.

[0089] like Figure 4 、 Figure 5 , screw holes 13 can be provided on the surface of the housing 6, such as Figure 5 A fixing member 14 is provided in the screw hole. The head end of the fixing member 14 can support the dichroic mirror 5 in the dichroic mirror mounting groove 12 , thereby fixing the dichroic mirror 5 .

[0090] On one surface of the housing 6 , two fixing members 14 can fix one dichroic mirror. If the dichroic mirror mounting groove 12 of the housing 6 passes through the two surfaces of the housing 6 , each dichroic mirror can be fixed by four fixing members.

[0091] The material of the fixing piece can be nylon to avoid scratching the surface of the optical element during installation.

[0092] Figure 6 This embodiment of a cooling module for a light source module is shown. The light source module is provided with an LED mounting position 15, on which each LED is mounted. Heat dissipation fins 16 are provided on the back of the LED mounting surface. A fan module 17 can be provided connected to the heat dissipation fins 16, with the axis of the fan module 17 parallel to the heat dissipation fins. This allows the heat generated by the LED to be dissipated promptly to protect the device.

[0093] like Figure 7 , a connecting arm 18 and a positioning hole 19 are provided on one side of the housing 6, and a guide groove 20 is provided on the other side of the housing 6, as shown Figure 6 , a positioning column 21 and a guide block 22 are provided at the position where the optical path module is installed with the light path module. By matching the positioning hole 19 with the positioning column 21, and matching the guide groove 20 with the raised portion of the guide block 22, the optical path module and the light source module can be quickly and accurately installed and fixed. After the optical path module and the light source module are installed, Figure 8 The guide block 22 is further provided with a through hole, and the housing 6 is provided with a threaded hole. By installing a screw 23 in the threaded hole, the optical path module can be further locked.

[0094] The optical path module, the light source module 1 and the light guide plug 2 can be assembled separately and then installed into the cold light source device, thus realizing modular assembly and facilitating disassembly and maintenance.

[0095] Based on the above embodiment, the present application also provides an endoscope system, which includes an optical fiber, an endoscope, and the above multi-spectral cold light source device. The multi-spectral cold light source device is connected to the optical fiber via a light guide plug, and the optical fiber is connected to the endoscope.

[0096] The above-described device and system embodiments are merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. Those skilled in the art may understand and implement the present invention without inventive effort.

[0097] The above are merely preferred embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A multi-spectral cold light source device, characterized in that: include: Optical path module, light source module and light guide plug; The optical path module includes a light source lens assembly, a light guide plug lens assembly, a dichroic mirror and a housing; the light source lens assembly and the light guide plug lens assembly are both provided with threads; the light guide plug is used to connect the optical fiber; The housing is provided with a light source lens assembly mounting hole, a light guide plug lens assembly mounting hole, and a dichroic mirror mounting groove; the light source lens assembly is connected to the light source lens assembly mounting hole via a thread, the light guide plug lens assembly is connected to the light guide plug lens assembly mounting hole via a thread, and the dichroic mirror is installed in the dichroic mirror mounting groove; The light from the light source module is transmitted by the light source lens assembly, transmitted or reflected by the dichroic mirror, and transmitted by the light guide plug lens assembly, and is converged into a point light source; When the light source lens assembly or the light guide plug lens assembly is rotated, the convergence point of the emergent light of the lens assembly changes.

2. The multi-spectral cold light source device according to claim 1, wherein: The light source module includes an ultraviolet LED, a blue LED, a green LED, an amber LED and a red LED.

3. The multi-spectral cold light source device according to claim 2, wherein: The dichroic mirrors include a first dichroic mirror, a second dichroic mirror, a third dichroic mirror, and a fourth dichroic mirror; the light source lens assembly includes a first light source lens assembly, a second light source lens assembly, a third light source lens assembly, a fourth light source lens assembly, and a fifth light source lens assembly; The light of the ultraviolet LED is transmitted through the first light source lens assembly, the first dichroic mirror, the second dichroic mirror, the third dichroic mirror, the fourth dichroic mirror and the light guide plug lens assembly to reach the light guide plug; The blue LED reaches the light guide plug after being transmitted through the second light source lens assembly, reflected by the first dichroic mirror, and transmitted through the second dichroic mirror, the third dichroic mirror, the fourth dichroic mirror, and the light guide plug lens assembly; The green LED reaches the light guide plug after being transmitted through the third light source lens assembly, reflected by the second dichroic mirror, and transmitted through the third dichroic mirror, the fourth dichroic mirror, and the light guide plug lens assembly; The amber LED reaches the light guide plug after being transmitted through the fourth light source lens assembly, reflected by the third dichroic mirror, and transmitted through the fourth dichroic mirror and the light guide plug lens assembly; The red LED reaches the light guide plug after being transmitted through the fifth light source lens assembly, reflected by the fourth dichroic mirror, and transmitted through the light guide plug lens assembly.

4. The multi-spectral cold light source device according to claim 1, wherein: The light source module is provided with heat dissipation fins, and the heat dissipation fins are arranged on the non-light-emitting surface of the light source module.

5. The multi-spectral cold light source device according to claim 4, characterized in that: The light source module is provided with a cooling module.

6. The multi-spectral cold light source device according to claim 1, wherein: The light source lens assembly and / or the light guide plug lens assembly includes a first lens, a second lens, a gasket, a pressure ring, and a lens barrel; The outer side of the lens barrel is provided with an external thread, and the external thread is connected to the mounting hole of the housing; A coaxial first hole, a second hole, and a threaded hole are sequentially provided on the inner side of the lens barrel, and the inner diameter of the first hole is smaller than the inner diameter of the second hole; The first lens is installed in the first hole, the second lens is installed in the second hole, the washer is installed in contact with the first lens and the second lens, and the pressure ring is arranged in the threaded hole through a thread and contacts the second lens.

7. The multi-spectral cold light source device according to claim 1, wherein: The multi-spectral cold light source device includes a fixing member, and the fixing member includes a head end portion and a threaded portion; The housing is provided with a screw hole, the screw hole is connected to the threaded portion, and the head end portion presses against the dichroic mirror in the dichroic mirror mounting groove.

8. The multi-spectral cold light source device according to claim 7, wherein: The head end portion can generate a certain deformation after being subjected to force.

9. The multi-spectral cold light source device according to claim 7, wherein: The dichroic mirror mounting groove passes through two sides of the housing, and each dichroic mirror is fixed by a plurality of fixing members.

10. An endoscope system, characterized in that: The endoscope system comprises an optical fiber, an endoscope, and the multi-spectral cold light source device according to any one of claims 1 to 9; the light guide plug is connected to the optical fiber, and the optical fiber is connected to the endoscope.

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