Endoscope lighting device

Abstract

The present invention discloses an illumination device for an endoscope, which is an independent component separated from the camera device of the endoscope, and includes a light source part, a light transmission medium part and a light guide part; the light source part is used to emit illumination light; the light transmission medium part includes a light transmission medium body, one end of the light transmission medium body is provided with a proximal interface, the other end of the light transmission medium body is provided with a distal interface, and the proximal interface is connected to the light source part, and the distal interface is connected to the light guide part; the light guide part can extend into the body cavity through the surgical cavity, and can direct the illumination light guided by the light transmission medium part to the illumination object at a preset divergence angle. Since the above-mentioned illumination device is an independent component separated from the camera device of the endoscope, when the light spot size needs to be adjusted, the light spot size can be adjusted according to demand without affecting the imaging field of the camera device, thereby avoiding the tedious operation of repeatedly focusing and adjusting the camera device after adjusting the light spot.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a lighting device for an endoscope. Background Art

[0002] Endoscope is an instrument that integrates traditional optics, ergonomics, precision machinery, modern electronics, mathematics, software, etc., and has been widely and deeply applied in the diagnosis and treatment of clinical diseases. The endoscope has an image sensor, an optical lens, a light source device, a mechanical device, etc. Its insertion part can enter the body through a surgical channel or other natural channels. Endoscopes can be used to see lesions that cannot be displayed by X-rays, so they are very useful for doctors in non-invasive or minimally invasive diagnosis. For example, with the help of an endoscope, doctors can observe ulcers or tumors in the stomach and formulate the best treatment plan based on this. On the other hand, endoscopes also have minimally invasive treatment functions. For example, using an endoscope to extend into the abdominal cavity through a surgical channel to perform minimally invasive treatment, which can significantly reduce the patient's pain compared to traditional open surgery and significantly reduce the probability of risks such as massive bleeding and infection.

[0003] The laparoscope generally includes an imaging device and an illumination device. The current laparoscope structure is mostly a system integration of the imaging part and the illumination part through a hard light pipe. This type of illumination device is only used for ordinary optical imaging and has the advantage of portability.

[0004] However, when some special light sources (such as lasers) are used for intracavitary disease diagnosis and treatment, this integrated laparoscope system has the following shortcomings: when the distance between the rigid light guide and the abdominal organs changes, the illumination spot and the imaging field of view will change; the rigid light guide uses a multimode fiber bundle to transmit light, which is difficult to use in some scenarios that require high coherence of the illumination light source. The following are examples of its limited applications:

[0005] For example, intracavitary photodynamic therapy. Intracavitary photodynamic therapy is the implementation of high-intensity laser irradiation on body cavity organs. Whether the irradiation spot can cover the lesion site is one of the important factors affecting its treatment effect. Real-time visualization of the effect of intracavitary photodynamic therapy with the help of an endoscope is an important research and development direction in this field. In an integrated system, the size of the light spot irradiated on the object is controlled by adjusting the distance between the end of the rigid endoscope lens and the object, which causes the imaging field of view to change accordingly. In addition, this integrated system is generally widely used for intraoperative observation of laparoscopic surgery, requiring the light guide window at the end of the rigid endoscope lens to have a large divergence angle to ensure that the image brightness within the surgical field of view has a high brightness uniformity. In this case, this integrated system is not suitable for photodynamic therapy and intraoperative observation of small lesions.

[0006] Another example is intracavitary laser speckle blood flow imaging. Intracavitary laser speckle blood flow imaging can be used for the diagnosis of diseases related to microcirculatory disorders and animal experimental research. The hard light guide tubes of the integrated laparoscope all use multimode fiber bundles, which significantly reduce the coherence of the laser and are not conducive to accurately obtaining blood flow velocity information.

[0007] In summary, how to solve the problem that the lighting device of an endoscope affects the imaging field of view of the camera device when the spot size needs to be adjusted has become a technical problem that technicians in this field need to solve urgently. Summary of the invention

[0008] The object of the present invention is to provide an endoscope lighting device to solve the problem that the endoscope lighting device affects the imaging field of view of a camera device when the light spot size needs to be adjusted.

[0009] In order to achieve the above-mentioned object, the present invention provides an illumination device for an endoscope, the illumination device is an independent component separated from the camera device of the endoscope, and the illumination device includes a light source part, a light transmission medium part and a light guide part;

[0010] The light source portion is used to emit illumination light;

[0011] The light transmission medium part comprises a light transmission medium body, one end of the light transmission medium body is provided with a proximal interface, the other end of the light transmission medium body is provided with a distal interface, and the proximal interface is connected to the light source part, and the distal interface is connected to the light guide part;

[0012] The light-guiding portion can extend into the body cavity through the surgical cavity, and can direct the illumination light guided out by the light-transmitting medium portion toward an illumination object at a preset divergence angle.

[0013] Preferably, the light guide portion comprises a hollow and elongated insertion portion, a light guide medium located in the hollow and elongated space of the insertion portion, a beam expansion module located at the head end of the insertion portion, and a light guide interface located at the tail end of the insertion portion;

[0014] One end of the light-guiding medium is connected to the light-guiding interface, and the other end of the light-guiding medium is connected to the beam expansion module;

[0015] The beam expansion module is used to emit the illumination light from the light-guiding medium toward the illumination object at the preset divergence angle;

[0016] The light guide interface is connected to the remote interface via a connecting terminal.

[0017] Preferably, the light transmitting medium body and the light guiding medium are both optical fibers.

[0018] Preferably, the optical fiber is a single-mode optical fiber.

[0019] Preferably, the optical fiber is a multimode optical fiber.

[0020] Preferably, the light guiding medium is a cylindrical lens or a cylindrical lens group.

[0021] Preferably, the light emitting end face of the beam expansion module is a polished optical fiber bundle end face, and is fixedly connected by glue dispensing at a position where the head end of the insertion portion is close to the optical fiber bundle end face.

[0022] Preferably, the beam expansion module comprises one or more lenses.

[0023] Preferably, the beam expansion module further includes a sleeve for fixing the lens.

[0024] Preferably, the lens is fixed in the sleeve by glue dispensing.

[0025] Preferably, the sleeve is fixed to the head end of the insertion portion by a fixing pin.

[0026] Preferably, the light emitting end face of the beam expansion module is perpendicular to the length direction of the insertion portion.

[0027] Preferably, an angle between the light emitting end face of the beam expansion module and the length direction of the insertion portion is less than 90°.

[0028] Preferably, each part of the light-guiding portion is made of high-temperature resistant material, and the distal interface and the light-guiding interface are detachably connected.

[0029] Preferably, a high temperature resistant protective cover is also provided at the light guide interface.

[0030] Preferably, the proximal interface and the light source portion are detachably connected.

[0031] Preferably, the proximal interface and the light source unit are an integrated structure.

[0032] Preferably, a positioning device is sleeved on the outer surface of the insertion portion, and the positioning device can slide and lock along the length direction of the insertion portion.

[0033] Preferably, the positioning device comprises a slider slidably matched with the insertion portion and a locking pin for locking the position of the slider.

[0034] Preferably, the locking pin is positioned in a knob-type and a spring-type or in a combination of the two.

[0035] Preferably, an end seat is provided at the rear end of the insertion portion.

[0036] Compared with the background technology, the lighting device of the endoscope is an independent component separated from the camera device of the endoscope, and the lighting device includes a light source part, a light transmission medium part and a light guide part; the light source part is used to emit illumination light; the light transmission medium part includes a light transmission medium body, one end of the light transmission medium body is provided with a proximal interface, the other end of the light transmission medium body is provided with a distal interface, and the proximal interface is connected to the light source part, and the distal interface is connected to the light guide part; the light guide part can extend into the body cavity through the surgical cavity, and can direct the illumination light derived from the light transmission medium part to the illumination object at a preset divergence angle. Since the lighting device is an independent component separated from the camera device of the endoscope, when the spot size needs to be adjusted, the spot size can be adjusted according to the demand without affecting the imaging field of the camera device, avoiding the tedious operation of repeatedly focusing and adjusting the camera device after adjusting the spot. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the overall structure of an endoscope lighting device provided by an embodiment of the present invention;

[0038] Figure 2 for Figure 1 A structural schematic diagram of a protective cover being provided at the light guide interface of the corresponding light guide portion;

[0039] Figure 3 Another schematic diagram of the structure of the light guide portion provided by an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of another overall structure of the lighting device for an endoscope provided in an embodiment of the present invention;

[0041] Figure 5 A schematic structural diagram of a light guide rod being used as a light guide medium in a light guide portion provided by an embodiment of the present invention.

[0042] superior Figure 1-Figure 5 middle,

[0043] Illuminating device 1, light source part 2, light transmitting medium part 3, proximal interface 3a, light transmitting medium body 3b, distal interface 3c, connecting terminal 4, light guiding part 5, insertion part 5a, end seat 5b, positioning device 5c, light guiding interface 5d, light guiding medium 5e, beam expansion module 5f, lens 5g, locking pin 51, slider 52, first lens 53, second lens 54, sleeve 55, protective cover 6. DETAILED DESCRIPTION

[0044] The core of the present invention is to provide an endoscope lighting device to solve the problem that the endoscope lighting device affects the imaging field of view of a camera device when the spot size needs to be adjusted.

[0045] In order to enable those skilled in the art to better understand the technical solution provided by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0046] like Figure 1-Figure 5 As shown, an embodiment of the present invention provides an endoscope lighting device, wherein the lighting device 1 is an independent component separated from the camera device of the endoscope, and the lighting device 1 includes a light source part 2, a light transmission medium part 3 and a light guide part 5; wherein the light source part 2 is used to emit illumination light; the light transmission medium part 3 includes a light transmission medium body 3b, one end of the light transmission medium body is provided with a proximal interface 3a, the other end of the light transmission medium body 3b is provided with a distal interface 3c, and the proximal interface 3a is connected to the light source part 2, the proximal interface 3a is coupled into the light transmission medium body 3b by a beam coupling method, so that the illumination light emitted from the light source part 2 is transmitted through the light transmission medium body 3b, and the distal interface 3c is connected to the light guide part 5, thereby transmitting the illumination light emitted from the light source part 2 from the light transmission medium body 3b to the light guide part 5; the light guide part 5 can extend into the body cavity through a natural cavity or through a surgical cavity with the assistance of a surgical instrument (such as a sheath tube, etc.), and can emit the illumination light derived from the light transmission medium part 3 to the illumination object at a preset divergence angle.

[0047] Since the above-mentioned lighting device is an independent component separated from the camera device of the endoscope, when the light spot size needs to be adjusted, the light spot size can be adjusted as needed without affecting the imaging field of view of the camera device, thereby avoiding the tedious operation of repeatedly focusing and adjusting the camera device after adjusting the light spot.

[0048] In some specific embodiments, the specific structure of the light guide part 5 may include a hollow and elongated insertion part 5a, a light guide medium 5e located in the hollow and elongated space of the insertion part 5a, a beam expansion module 5f located at the head end of the insertion part 5a, and a light guide interface 5d located at the tail end of the insertion part 5a; wherein one end of the light guide medium 5e is connected to the light guide interface 5d, and the other end of the light guide medium 5e is connected to the beam expansion module 5f; the beam expansion module 5f is used to direct the illumination light from the light guide medium 5e to the illumination object at a preset divergence angle; the light guide interface 5d is connected to the distal interface 3c through the connection terminal 4. Of course, it can be understood that the above is only an example of the preferred structure of the light guide part of the present invention. In actual application, other structural forms commonly used by those skilled in the art can also be used, as long as it can be realized through a natural cavity or through a surgical cavity with the assistance of a surgical instrument (such as a sheath tube, etc.) to extend into the body cavity, and the illumination light guided out of the light transmission medium part can be directed to the illumination object at a preset divergence angle.

[0049] It should be noted that, generally speaking, the light transmission medium body 3b and the light guide medium 5e are preferably optical fibers. Of course, it can be understood that the optical fiber is only a method for transmitting the illumination light emitted by the light source unit 2 in this embodiment of the present invention, and the present invention does not limit the transmission method and transmission medium for transmitting the illumination light emitted from the light source unit 2. In actual application, other forms of light transmission medium bodies commonly used by those skilled in the art can also be used, such as Figure 4 and Figure 5 In the form of a light guide rod as shown; in addition, the above-mentioned light guide medium 5e can also be a cylindrical lens or a cylindrical lens group.

[0050] It should also be noted that the optical fiber can be a single-mode optical fiber, and the single-mode optical fiber can be in the form of a single strand or in the form of a plurality of strands in a bundle; the optical fiber can also be a multi-mode optical fiber, and the multi-mode optical fiber can exist in the form of a single strand or in the form of a plurality of strands in a bundle. Single-mode optical fiber generally preferably adopts a single-mode optical fiber bundle, which is mainly used to transmit the laser emitted by the light source unit. For example, single-mode optical fiber bundle illumination, combined with the relevant algorithms of the camera system, can realize intracavitary laser speckle blood flow imaging, and can also be used for the diagnosis and research of hemodynamic-related diseases such as microcirculatory disorders. It can also be used for multi-watt laser illumination, combined with the filtering means of the camera system, and can be used for intracavitary photodynamic therapy, so that the intracavitary photodynamic therapy process can be visualized in real time; and multi-mode optical fiber, generally also preferably in the form of a multi-mode optical fiber bundle structure, is mainly used to transmit incoherent light emitted by the light source unit. In the specific application process, it can be selected according to actual needs.

[0051] Those skilled in the art should be able to understand that, generally speaking, the beam expansion module 5f includes a lens 5g, and the lens 5g can be composed of one or more lenses, such as Figure 1 and Figure 2 As shown, the lens 5g is composed of a first lens 53 and a second lens 54. In addition, the light emitting end face of the beam expansion module 5f can also be a polished optical fiber end face, and is fixedly connected by glue at a position where the head end of the insertion part 5a is close to the optical fiber bundle end face.

[0052] In some more specific embodiments, the beam expansion module 5f further includes a sleeve 55 for fixing the lens. Fixing the lens by the sleeve can make the disassembly of the lens more convenient. Of course, it can be understood that the above-mentioned structure of fixing the lens by the sleeve is only a preferred example of the embodiment of the present invention. In actual application, the lens 5g can also be directly fixed in the hollow of the head end of the insertion part 5a by dispensing glue.

[0053] The sleeve 55 can be fixed to the head end of the insertion part 5a by a fixing pin 56, or can be sealed and fixed to the head end of the insertion part by applying a sealant. In actual application, the corresponding fixing method can be selected according to the actual situation.

[0054] It should be noted here that the angle between the light emitting end face of the beam expansion module 5f and the length direction of the insertion part 5a can be designed to be vertical or non-vertical (that is, the angle between the light emitting end face of the beam expansion module 5f and the length direction of the insertion part 5a is less than 90°). In actual application, the arrangement can be selected according to actual needs.

[0055] In some more specific embodiments, each part of the light guide part 5 is made of high temperature resistant material, and the distal interface 3c and the light guide interface 5d are detachably connected. In this way, high temperature disinfection can be performed before connecting the light transmission medium part 3 and the light source part 2 to implement body cavity illumination, thereby minimizing the risk of infection of the body cavity caused by the light guide part 5.

[0056] In order to better improve the sealing performance of the connection between the light guide interface 5d and the rear end of the insertion part 5a, a sealant can be applied to the contact area between the two to seal. In addition, a high-temperature resistant protective sleeve 6 can be set at the light guide interface 5d, and the light guide interface 5d can be sealed by the protective sleeve 6. It should be noted here that, generally speaking, the light guide part 5 and the protective sleeve 6 need to be made of high-temperature resistant materials that can withstand more than 135°C. The connection between the proximal interface 3a of the light transmission medium part 3 and the light source part 2 can be an integrated structure or a split structure that can be independently detached.

[0057] In addition, the light guide medium 5e and the light guide interface 5d, as well as the light guide medium 5e and the beam expansion module 5f, are preferably designed as an integrated connection structure. In this way, the light guide medium 5e, the light guide interface 5d, and the beam expansion module 5f can form an integrated connected module, which is convenient for assembly or removal in the hollow area of ​​the light guide portion 5 by insertion or extraction operations.

[0058] In some more specific embodiments, a positioning device 5c is also sleeved on the outer surface of the insertion portion 5a, and the positioning device 5c can slide and lock along the length direction of the insertion portion 5a. In this way, the length of the insertion portion 5a extending into the body cavity can be adjusted by adjusting the locking position of the positioning device 5c.

[0059] In a further embodiment, the positioning device 5c may specifically include a slider 52 that slides with the insertion portion 5a and a locking pin 51 for locking the position of the slider 52. It should be noted that in order to achieve the smoothness of the sliding of the slider, the slider sleeve should maintain a certain gap on the insertion portion, so that the locking pin can fix the slider 52 at a specific position on the outer surface of the insertion portion 5a by rotating and twisting, or release the slider 52 from a specific position on the outer surface of the insertion portion 5a. It should be noted that the positioning method of the locking pin 51 is a combination of one or both of the knob type and the spring type, or any other positioning method that can fix the positioning device 5c on the insertion portion 5a or release it from the insertion portion 5a. Of course, it can be understood that the structure of the above-mentioned positioning device is only a preferred example of the embodiment of the present invention. In actual application, it can also be the structural form of other positioning devices commonly used by technicians in this field.

[0060] In a further embodiment, an end seat 5b is further provided at the tail end of the insertion portion 5a. It is understandable that the outer diameter of the end seat 5b should be larger than the insertion portion 5a. On the one hand, it is used to limit the maximum depth of the insertion portion 5a inserted into the body cavity, and on the other hand, it is used to make it more convenient to fix the light guide interface 5d on the light guide portion 5.

[0061] In addition, it should be noted that the diameter of the insertion portion 5a of the light guide 5 needs to be determined according to the inner diameter of the corresponding surgical cavity or the aperture of the natural cavity of the human body, and should be slightly smaller than the inner diameter of the surgical cavity or the aperture of the natural cavity of the human body. For example, when the light guide 5 is inserted into the body cavity through the surgical cavity with the assistance of a surgical instrument such as a sheath, the outer diameter of the insertion portion 5a is designed to be slightly smaller than the inner diameter of the sheath, so that the insertion portion 5a can be inserted into the body cavity through the inner diameter of the sheath, and the positioning device 5c is positioned on the insertion portion 5a, so that the positioning device 5c can be exposed outside the sheath to prevent the light guide 5 from sliding into the body cavity as a whole.

[0062] The above is a detailed introduction to the lighting device for endoscope provided by the present invention. It should be noted that the various embodiments of the present invention are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

[0063] It should also be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that an 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 articles or devices. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0064] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An endoscope lighting device, characterized in that: The lighting device (1) is an independent component separated from the camera device of the endoscope, so as to avoid the lighting device adjusting the light spot size and affecting the imaging field of the camera device, and the lighting device (1) comprises a light source part (2), a light transmission medium part (3) and a light guide part (5); The light source part (2) is used to emit illumination light; The light transmission medium part (3) comprises a light transmission medium body (3b), one end of the light transmission medium body is provided with a proximal interface (3a), the other end of the light transmission medium body (3b) is provided with a distal interface (3c), the proximal interface (3a) is connected to the light source part (2), and the distal interface (3c) is connected to the light guide part (5); The light guide part (5) can extend into the body cavity through the surgical cavity, and can direct the illumination light guided by the light transmission medium part (3) toward the illumination object at a preset divergence angle; The light-guiding portion (5) comprises a hollow and elongated insertion portion (5a), a positioning device (5c) is sleeved on the outer surface of the insertion portion (5a), and the positioning device (5c) can slide and lock along the length direction of the insertion portion (5a).

2. The endoscope lighting device according to claim 1, characterized in that: The light guide portion (5) further comprises a light guide medium (5e) located in the hollow and elongated space of the insertion portion (5a), a beam expansion module (5f) located at the head end of the insertion portion (5a), and a light guide interface (5d) located at the tail end of the insertion portion (5a); One end of the light-guiding medium (5e) is connected to the light-guiding interface (5d), and the other end of the light-guiding medium (5e) is connected to the beam expansion module (5f); The beam expansion module (5f) is used to emit the illumination light from the light-guiding medium (5e) toward the illumination object at the preset divergence angle; The light guide interface (5d) is connected to the remote interface (3c) via a connecting terminal (4).

3. The endoscope lighting device according to claim 2, characterized in that: The light transmission medium body (3b) and the light guiding medium (5e) are both optical fibers.

4. The endoscope lighting device according to claim 3, characterized in that: The optical fiber is a single-mode optical fiber.

5. The endoscope lighting device according to claim 3, characterized in that: The optical fiber is a multimode optical fiber.

6. The endoscope lighting device according to claim 2, characterized in that: The light-guiding medium (5e) is a cylindrical lens.

7. The lighting device for an endoscope according to claim 2, characterized in that: The light-guiding medium (5e) is a cylindrical lens group.

8. The endoscope lighting device according to claim 2, characterized in that: The light emitting end face of the beam expansion module (5f) is a polished optical fiber bundle end face, and is fixedly connected by glue dispensing at a position where the head end of the insertion portion (5a) is close to the optical fiber bundle end face.

9. The endoscope lighting device according to claim 2, characterized in that: The beam expansion module includes one or more lenses (5g).

10. The endoscope lighting device according to claim 9, characterized in that: The beam expansion module (5f) also includes a sleeve (55) for fixing the lens (5g).

11. The endoscope lighting device according to claim 10, characterized in that: The lens (5g) is fixed in the sleeve (55) by means of glue dispensing.

12. The lighting device for an endoscope according to claim 10, characterized in that: The sleeve (55) is fixed to the head end of the insertion portion (5a) via a fixing pin (56).

13. The endoscope lighting device according to claim 2, characterized in that: The light emitting end face of the beam expansion module (5f) is perpendicular to the length direction of the insertion portion (5a).

14. The endoscope lighting device according to claim 2, characterized in that: The angle between the light emitting end face of the beam expansion module (5f) and the length direction of the insertion portion (5a) is less than 90°.

15. The endoscope lighting device according to claim 2, characterized in that: Each part of the light-guiding portion (5) is made of high-temperature resistant material, and the distal interface (3c) and the light-guiding interface (5d) are detachably connected.

16. The lighting device for an endoscope according to claim 15, characterized in that: The light guide interface (5d) is also provided with a high temperature resistant protective sleeve (6).

17. The lighting device for an endoscope according to claim 2, characterized in that: The proximal interface (3a) and the light source part (2) are detachably connected.

18. The lighting device for an endoscope according to claim 2, characterized in that: The proximal interface (3a) and the light source unit (2) are an integrated structure.

19. The endoscope lighting device according to claim 18, characterized in that: The positioning device (5c) comprises a slider (52) slidably matched with the insertion portion (5a) and a locking pin (51) used to lock the position of the slider (52).

20. The endoscope lighting device according to claim 19, characterized in that: The locking pin (51) is positioned in a knob-type and a spring-pressing type, or in a combination of both types.

21. The lighting device for an endoscope according to any one of claims 2 to 20, characterized in that: An end seat (5b) is provided at the rear end of the insertion portion (5a).

Images