Endoscope system and light source device thereof

Abstract

The light source device comprises a first light source assembly, a second light source assembly, a guide assembly and a convergence assembly, the first light source assembly emits a collimated first light beam, the second light source assembly emits a collimated second light beam, and the cross section of the second light beam is smaller than or equal to 10% of the cross section of the first light beam. The guide assembly is arranged at the intersection of light emitting paths of the first light source assembly and the second light source assembly, the guide assembly is provided with a reflecting surface at the incident position of the second light beam, the size of the reflecting surface is matched with the size of the cross section of the second light beam, and the reflecting surface is used for reflecting the second light beam to the convergence assembly. The other part except the part provided with the reflecting surface enables the first light beam to be transmitted and incident to the converging component. Switching output of the two light beams with the overlapped wave bands can be achieved only by controlling opening and closing of the first light source assembly or the second light source assembly, and time consumed for switching output of the illumination light beams can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to an endoscope system and a light source device thereof. Background Art

[0002] In order to achieve more effective observation of the target area and improve the accuracy of diagnosis of the lesion area, the endoscope system will be set with a variety of lighting modes. For example, in addition to white light illumination observation, the endoscope system can also make the light source device emit lighting light of a specific band (hereinafter referred to as "special light") to make some features of the target area more clearly appear.

[0003] Among them, since the special light is usually visible light, that is, the wavelength band where it is located is within the white light band, if a semi-transparent and semi-reflective filter is set between the special light and the white light to combine the light, so that the output light paths of both after passing through the semi-transparent and semi-reflective filters can be incident on the converging component and exported to the light-guiding component of the endoscope, it will cause the light in the white light that is in the wavelength band where the special light is located to be reflected or transmitted, and cannot be merged into its output light path, causing the white light spectrum to change.

[0004] In order to avoid changing the spectrum of white light, in the related art, the first light source in the light source device can emit white light, and the second light source can emit special light, and a reflector with an adjustable deflection angle is set at the intersection of the output light path of the first light source and the output light path of the second light source; when the reflector is at the first deflection angle, one of the white light and the special light can be reflected to the converging component, and the other cannot be incident on the converging component due to being blocked by the reflector; when the reflector is at the second deflection angle, one of the white light and the special light can be reflected to a direction deviating from the converging component, unable to reach the converging component, and the other can be incident on the converging component. In this way, the output of white light or special light can be switched by adjusting the deflection angle of the reflector.

[0005] However, this switching method requires driving the reflector to adjust the deflection angle, so it takes a relatively long time, resulting in a poor user experience. Utility Model Content

[0006] The utility model aims to provide a light source device, which is applied to an endoscope system and can realize the switching output of two light beams with overlapping wavelength bands, and the switching time is short.

[0007] The utility model also provides an endoscope system.

[0008] To achieve the above object, the utility model provides a light source device, which is applied to an endoscope system, wherein the light source device comprises a converging component for converging a light beam to a light guide component, and the light source device further comprises:

[0009] A first light source assembly, used for emitting a collimated first light beam;

[0010] A second light source assembly is used to emit a collimated second light beam, wherein the cross section of the second light beam is less than or equal to 10% of the cross section of the first light beam, and the wavelength band of the second light beam is within the wavelength band of the first light beam;

[0011] A guiding component is arranged at the intersection of the light output path of the first light source component and the light output path of the second light source component; the guiding component is provided with a reflecting surface at the incident position of the second light beam, and the size of the reflecting surface matches the cross-sectional size of the second light beam, and is used to reflect the second light beam to the converging component; the other parts of the guiding component except the part provided with the reflecting surface are used to make the first light beam transmit and be incident on the converging component.

[0012] Optionally, the guide assembly comprises:

[0013] A first substrate is provided with a reflective structure to form the reflective surface;

[0014] The second substrate is provided with a mounting hole, the first substrate is embedded in the mounting hole, and the second substrate is used to allow the first light beam to transmit and be incident on the converging component.

[0015] Optionally, a gap between an inner wall of the mounting hole and the first substrate is filled with an adhesive.

[0016] Optionally, the adhesive is transmissive to the first light beam.

[0017] Optionally, the reflective surface is arranged at a central position of the guide assembly.

[0018] Optionally, the reflective surface is only used to reflect light in a wavelength band where the second light beam is located.

[0019] Optionally, the first light source assembly includes at least two light-emitting elements and a light-combining component, and the light beams emitted by the at least two light-emitting elements are combined by the light-combining component to form the first light beam.

[0020] Optionally, the second light beam is a laser light beam.

[0021] Optionally, the optical axis of the light output path of the first light source assembly is coaxial with the optical axis of the converging assembly, the light output path of the first light source assembly is orthogonal to the light output path of the second light source assembly, and the angle between the guide assembly and the optical axis of the light output path of the first light source assembly is 45°.

[0022] An endoscope system comprises: a light source device as described in any one of the above items.

[0023] It can be known from the above technical scheme that a light source device provided by the utility model is applied to an endoscope system, and the light source device includes a converging component for converging a light beam to a light guide component. The light source device also includes a first light source component, a second light source component and a guiding component, the first light source component is used to emit a collimated first light beam, the second light source component is used to emit a collimated second light beam, wherein the cross section of the second light beam is less than or equal to 10% of the cross section of the first light beam, the wavelength band where the second light beam is located is located within the wavelength band where the first light beam is located, the guiding component is arranged at the intersection of the light output path of the first light source component and the light output path of the second light source component, the guiding component is provided with a reflecting surface at the incident position of the second light beam, and the size of the reflecting surface matches the size of the cross section of the second light beam, and is used to reflect the second light beam to the converging component, and the other parts of the guiding component except the part provided with the reflecting surface are used to transmit the first light beam and be incident on the converging component.

[0024] In the light source device of the utility model, the guide component can make the first light beam incident on the converging component and the second light beam incident on the converging component, so that the light source device can switch to output an illumination light beam including the first light beam or an illumination light beam including the second light beam by controlling the opening and closing of the first light source component or the second light source component. Compared with the prior art that requires rotating the reflector to realize the switching output of two light beams with overlapping bands, the light source device only needs to control the opening and closing of the first light source component or the second light source component to realize the switching output of two light beams with overlapping bands, which can reduce the time consumption of switching the output illumination light beams.

[0025] The utility model provides an endoscope system which can achieve the above beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of a light source device of a conventional endoscope system;

[0028] Figure 2 A schematic diagram of the structure of a light source device provided by one embodiment of the utility model;

[0029] Figure 3 for Figure 2 a front view of the guide assembly shown;

[0030] Figure 4 for Figure 2 The diagram shows a light path diagram of a first light source assembly of a light source device when emitting a first light beam.

[0031] The reference numerals in the drawings of the specification include:

[0032] 10-light-guiding component, 11-first light source assembly, 12-second light source assembly, 13-reflector, 14-converging assembly, 20-guiding assembly, 21-first substrate, 22-second substrate, 23-adhesive, 110-first light source, 111-first lens assembly, 120-second light source, 121-second lens assembly. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solutions in the present invention, 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 them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] In order to achieve more effective observation of the target part and improve the accuracy of diagnosis of the lesion, the endoscope system will be set with a variety of lighting modes. For example, in addition to white light illumination observation, the endoscope system can also make the light source device emit special light to make some features of the target part more obvious. Among them, since the special light is usually visible light, that is, its wavelength is within the white light band, if a semi-transparent and semi-reflective filter is set between the special light and the white light to combine the light, so that the output light paths of both after passing through the semi-transparent and semi-reflective filters can be incident on the converging component and exported to the light-guiding component of the endoscope, it will cause the light in the white light in the wavelength band where the special light is located to be reflected or transmitted, and cannot be merged into its output light path, so that the white light spectrum changes.

[0035] To avoid changing the white light spectrum, in the related art, reference can be made to Figure 1 As shown, Figure 1The schematic diagram of the light source device of the existing endoscope system is that the first light source component 11 in the light source device emits white light, the second light source component 12 emits special light, and a reflector 13 with an adjustable deflection angle is set at the intersection of the output light path of the first light source component 11 and the output light path of the second light source component 12. When the reflector 13 is at the first deflection angle, the special light can be reflected to the converging component 14, and the white light cannot be incident on the converging component 14 because it is blocked by the reflector 13; when the reflector 13 is at the second deflection angle, the special light can be reflected to a direction deviating from the converging component 14, so that it cannot reach the converging component 14, and the white light can be incident on the converging component 14. Thus, the output of white light or special light can be switched by adjusting the deflection angle of the reflector 13, wherein the spectrum of the white light introduced into the converging component 14 is consistent with the spectrum of the white light emitted by the first light source component 11. However, this switching method requires driving the reflector 13 to adjust the deflection angle, so it takes a relatively long time, resulting in a poor user experience.

[0036] In view of this, the utility model provides a light source device for an endoscope system and an endoscope system, which can realize the switching output of two light beams with overlapping wavelength bands compared with the prior art, and the switching time is shorter.

[0037] Specifically, this embodiment provides a light source device, which is applied to an endoscope system, wherein the light source device includes a converging component for converging a light beam to a light guide component, and further includes:

[0038] A first light source assembly, used for emitting a collimated first light beam;

[0039] A second light source assembly is used to emit a collimated second light beam, wherein the cross section of the second light beam is less than or equal to 10% of the cross section of the first light beam, and the wavelength band of the second light beam is within the wavelength band of the first light beam;

[0040] A guiding component is arranged at the intersection of the light output path of the first light source component and the light output path of the second light source component; the guiding component is provided with a reflecting surface at the incident position of the second light beam, and the size of the reflecting surface matches the cross-sectional size of the second light beam, and is used to reflect the second light beam to the converging component; the other parts of the guiding component except the part provided with the reflecting surface are used to make the first light beam transmit and be incident on the converging component.

[0041] The first light source assembly emits a collimated first light beam, which is incident on the guide assembly and can be transmitted through other parts of the guide assembly except the part with the reflective surface, and then is incident on the converging assembly. The second light source assembly emits a collimated second light beam, which is incident on the reflective surface of the guide assembly and can be reflected by the reflective surface to the converging assembly. Thus, the guide assembly can make the first light beam incident on the converging assembly and the second light beam incident on the converging assembly, so that the light source device can switch the output of the illumination light beam containing the first light beam or the illumination light beam containing the second light beam by controlling the opening and closing of the first light source assembly or the second light source assembly. Therefore, compared with the prior art that requires rotating the reflector to realize the switching output of two light beams with overlapping bands, the light source device of this embodiment only needs to control the opening and closing of the first light source assembly or the second light source assembly to realize the switching output of two light beams with overlapping bands, which can reduce the time consumption of switching the output illumination light beams.

[0042] The cross section of the second light beam is less than or equal to 10% of the cross section of the first light beam, and the size of the reflective surface of the guide assembly matches the size of the cross section of the second light beam. Therefore, the area occupied by the reflective surface can be smaller, and the reflective surface in the guide assembly has less influence on the spectrum and / or light energy of the first light beam. In the process of the first light beam being transmitted to the converging assembly through the guide assembly, since most of the light in the first light beam can pass through the guide assembly while maintaining the spectrum unchanged, the spectrum of the first light beam incident on the converging assembly will not change too much, and its light energy will not be lost too much. The shape and size of the reflective surface can be set according to the shape and size of the cross section of the second light beam. Exemplarily, the shape of the reflective surface can be, but not limited to, square, circular or elliptical.

[0043] In some embodiments, the guide assembly may include: a first substrate, provided with a reflective structure to form the reflective surface. The reflective structure can reflect the second light beam, so that the second light beam can be reflected when incident on the reflective surface formed by the reflective structure. In this embodiment, the reflective structure is not specifically limited, and the reflective structure can be but not limited to a reflective layer, and can be but not limited to a plated film layer or a coating formed by coating.

[0044] In some embodiments, the guide component may include: a first substrate, provided with a reflective structure to form the reflective surface; a second substrate, provided with a mounting hole, the first substrate being embedded in the mounting hole, and the second substrate being used to allow the first light beam to be transmitted and incident on the converging component. On the one hand, the second substrate can serve to mount the first substrate; on the other hand, the second substrate can reserve space for processing the spectrum. For example, a structure that reflects or transmits the corresponding spectrum band can be set on the second substrate according to application requirements. In some embodiments, an anti-reflection film is provided on at least one side of the second substrate. The anti-reflection film reduces the reflection on the surface of the second substrate when the first light beam passes through, reduces the loss of light energy, and helps to improve the brightness of the light source device. The guide component adopts a structure of a combination of the first substrate and the second substrate, which is convenient for coating the first substrate and the second substrate respectively, and is easy to process. For example, reference can be made to Figure 2 and Figure 3 , Figure 2 is a schematic structural diagram of a light source device provided by an embodiment, Figure 3 for Figure 2 The front view of the guide assembly shown in the figure shows that the guide assembly 20 is arranged at the intersection of the light-emitting optical path of the first light source assembly 11 and the light-emitting optical path of the second light source assembly 12. The guide assembly 20 includes a first substrate 21 and a second substrate 22. The second substrate 22 is provided with a mounting hole, and the first substrate 21 is embedded in the mounting hole of the second substrate 22. The second light beam emitted by the second light source assembly 12 can be incident on the reflection surface formed by the first substrate 21.

[0045] In some embodiments, the gap between the inner wall of the mounting hole and the first substrate 21 is filled with an adhesive 23, and the first substrate 21 and the second substrate 22 are firmly connected by the adhesive 23. Exemplarily, the adhesive 23 can be glue. The adhesive 23 can transmit the first light beam, reducing the influence of the guide component 20 on the spectrum and / or light energy of the first light beam.

[0046] In some embodiments, the guide component 20 may include: a first substrate, provided with a reflective structure to form the reflective surface; a second substrate, the first substrate is attached to one side of the second substrate, and the second substrate is used to transmit the first light beam and incident on the converging component 14. The second light beam is incident on the reflective surface formed by the first substrate and can be reflected to the converging component 14. The second substrate reserves a space for processing the spectrum. For example, a structure for reflecting or transmitting the corresponding spectrum band can be set on the second substrate according to application requirements. The first substrate can be attached to the side of the second substrate close to the second light source component 12. The guide component 20 adopts a structure of a combination of a first substrate and a second substrate, which is convenient for coating the first substrate and the second substrate respectively, and is easy to process.

[0047] In the above embodiments, the shape and size of the second substrate 22 are not limited and can be set according to application requirements in actual applications.

[0048] In some embodiments, the reflective surface is disposed at the center of the guide assembly 20, which can ensure that the centers of the light spots of the first light beam and the second light beam focused by the converging assembly 14 and introduced into the light guide component 10 are coaxial. In addition, since the light beam closer to the edge is more difficult to be introduced into the light guide component 10, the reflective surface is disposed at the center of the guide assembly 20, which can also ensure that the second light beam is introduced into the light guide component 10, thereby reducing light loss.

[0049] The reflective surface can reflect light in the entire wavelength range, so that the wavelength band where the second light beam is located can be reflected. In some embodiments, the reflective surface is only used to reflect light in the wavelength band where the second light beam is located, so that when the first light beam is emitted, the reflective surface only reflects light in the wavelength band where the second light beam is located, and does not reflect light in other wavelength bands, which can reduce the light loss of the first light beam. In addition, since the other parts of the guide component 20 except the part where the reflective surface is provided can still transmit the light in the wavelength band where the second light beam is located in a large area, the spectrum of the first light beam is less affected.

[0050] In this embodiment, the structure of the first light source assembly 11 is not limited, and can be set according to application requirements in actual applications. In some embodiments, the first light source assembly 11 may include at least two light-emitting elements and a light combining component, and the light beams emitted by the at least two light-emitting elements are combined by the light combining component to form the first light beam. The first light beam emitted by the first light source assembly 11 may be white light, and the first light source assembly 11 may use a simple white light source, or the first light source assembly 11 may include a light source that emits three primary colors of light respectively, and the three primary colors of light are combined to form white light. The light source may be, but is not limited to, an LED. In some embodiments, the first light source assembly 11 may include: a first light source 110 for emitting a first light beam; and a first lens assembly 111 for shaping the first light beam emitted by the first light source 110. The first light beam emitted by the first light source 110 is controlled to a desired size and angle by the first lens assembly 111. For example, reference may be made to Figure 4 , Figure 4 for Figure 2 The schematic diagram of the light path when the first light source component of the light source device emits a first light beam is shown. As shown in the figure, the first light source 110 emits a first light beam, and the first lens component 111 collimates the first light beam emitted by the first light source 110, and the light beam is incident on the guide component 20. After the first light beam passes through the guide component 20, it is converged by the converging component 14 and is incident on the light input end of the light guide component 10.

[0051] In this embodiment, the structure of the second light source assembly 12 is not limited, and can be set according to application requirements in actual applications. In some embodiments, the second light beam emitted by the second light source assembly 12 is a laser beam, and the laser beam has concentrated energy and a small beam cross-section. The size of the reflective surface of the guide assembly 20 can be reduced accordingly to minimize the obstruction caused by the reflective surface when the first light beam passes through, thereby reducing the loss of light energy. In some embodiments, the second light source assembly 12 may include: a second light source 120 for emitting a second light beam; and a second lens assembly 121 for shaping the second light beam emitted by the second light source 120. The second light beam emitted by the second light source 120 is controlled to the required size and angle by the second lens assembly 121, and the second lens assembly 121 can collimate the second light beam. The second light source 120 may be a laser source.

[0052] The converging component 14 is used to converge the outgoing light beam of the guiding component 20, so that the outgoing light beam of the guiding component 20 converges and enters the light inlet end of the light guide component 10. In this embodiment, the structure of the converging component 14 is not limited, and the converging component 14 may include one or more lenses, and may include any one of a convex lens, a concave lens, a plano-convex lens, and a plano-concave lens, or a combination of any multiple thereof.

[0053] In some embodiments, the optical axis of the light path of the first light source assembly 11 is coaxial with the optical axis of the converging assembly 14, the light path of the first light source assembly 11 is orthogonal to the light path of the second light source assembly 12, and the angle between the guide assembly 20 and the optical axis of the light path of the first light source assembly 11 is 45°. Figure 2 and 4 As shown, the light output path of the first light source component 11 is orthogonal to the light output path of the second light source component 12, the guide component 20 is arranged at the intersection of the light output path of the first light source component 11 and the light output path of the second light source component 12, and the first substrate 21 and the second substrate 22 both have an angle of 45° with the optical axis of the light output path of the first light source component 11.

[0054] This embodiment also provides an endoscope system, including: a light source device as described in any of the above embodiments.

[0055] In the endoscope system of this embodiment, the light source device includes a first light source assembly, a second light source assembly, a guide assembly and a convergence assembly, the first light source assembly is used to emit a collimated first light beam, the second light source assembly is used to emit a collimated second light beam, wherein the cross section of the second light beam is less than or equal to 10% of the cross section of the first light beam, and the wavelength band of the second light beam is located within the wavelength band of the first light beam, the guide assembly is arranged at the intersection of the light output path of the first light source assembly and the light output path of the second light source assembly, the guide assembly is provided with a reflection surface at the incident position of the second light beam, and the size of the reflection surface matches the size of the cross section of the second light beam, and is used to reflect the second light beam to the convergence assembly, and the other parts of the guide assembly except the part provided with the reflection surface are used to make the first light beam transmit and be incident on the convergence assembly, and the convergence assembly is used to converge the light beam to the light guide component. The second light beam emitted by the second light source assembly can be a special light, and the guide assembly can make the first light beam incident on the convergence assembly and the second light beam incident on the convergence assembly, so as to realize the switching output of the light source device containing the first light beam or the second light beam by controlling the opening and closing of the first light source assembly or the second light source assembly. Compared with the prior art which requires rotating the reflector to achieve the switching output of two light beams with overlapping bands, the light source device of the endoscope system only needs to control the opening and closing of the first light source component or the second light source component to achieve the switching output of two light beams with overlapping bands, thereby reducing the time consumed in switching the output illumination beams.

[0056] The endoscope system and light source device provided by the utility model are introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A light source device, applied to an endoscope system, comprising a converging component for converging a light beam to a light guide component, characterized in that: The light source device further comprises: A first light source assembly, used for emitting a collimated first light beam; A second light source assembly is used to emit a collimated second light beam, wherein the cross section of the second light beam is less than or equal to 10% of the cross section of the first light beam, and the wavelength band of the second light beam is within the wavelength band of the first light beam; A guiding component is arranged at the intersection of the light output path of the first light source component and the light output path of the second light source component; the guiding component is provided with a reflecting surface at the incident position of the second light beam, and the size of the reflecting surface matches the cross-sectional size of the second light beam, and is used to reflect the second light beam to the converging component; the other parts of the guiding component except the part provided with the reflecting surface are used to make the first light beam transmit and be incident on the converging component.

2. The light source device according to claim 1, characterized in that: The guide assembly comprises: A first substrate is provided with a reflective structure to form the reflective surface; The second substrate is provided with a mounting hole, the first substrate is embedded in the mounting hole, and the second substrate is used to allow the first light beam to transmit and be incident on the converging component.

3. The light source device according to claim 2, characterized in that: The gap between the inner wall of the mounting hole and the first substrate is filled with an adhesive.

4. The light source device according to claim 3, characterized in that: The adhesive can transmit the first light beam.

5. The light source device according to claim 1, characterized in that: The reflecting surface is arranged at the center position of the guiding assembly.

6. The light source device according to claim 1, characterized in that: The reflective surface is only used to reflect light in the wavelength band where the second light beam is located.

7. The light source device according to any one of claims 1 to 6, characterized in that: The first light source assembly includes at least two light-emitting elements and a light-combining component. Light beams emitted by the at least two light-emitting elements are combined by the light-combining component to form the first light beam.

8. The light source device according to any one of claims 1 to 6, characterized in that: The second light beam is a laser light beam.

9. The light source device according to any one of claims 1 to 6, characterized in that: The optical axis of the light output path of the first light source assembly is coaxial with the optical axis of the converging assembly, the light output path of the first light source assembly is orthogonal to the light output path of the second light source assembly, and the angle between the guide assembly and the optical axis of the light output path of the first light source assembly is 45°.

10. An endoscope system, characterized in that: include: A light source device as claimed in any one of claims 1 to 9.

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