Endoscope light source device and endoscope

Abstract

The invention discloses an endoscope light source device and an endoscope, and belongs to the technical field of endoscopes. The endoscope light source device comprises a plurality of light emitting units, a light combining assembly and a light emitting mirror set. The light combination assembly comprises a plurality of prisms combined together, the prisms correspond to the light-emitting units respectively, each prism comprises a light-in face, the light-emitting units are located outside the light-in faces of the corresponding prisms respectively, one prism in the prisms further comprises a light-out face, and the light-out lens set is located outside the light-out face. And the light combining assembly is used for combining the light beams received by the light incident surfaces of the plurality of prisms, guiding the light beams to the light emergent surface, and emitting the light beams to the light emergent lens group after the light beams are emitted from the light emergent surface. The endoscope light source device is simple in structure, the problem that the structure of an endoscope light source device in the prior art is complex is solved, and the effect of simplifying the structure of the endoscope light source device is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of endoscopes, and in particular to an endoscope light source device and an endoscope. Background Art

[0002] An endoscope is a detection instrument that includes a camera device, an endoscope light source device, and a display device. It is one of the important surgical instruments in minimally invasive surgery. During the use of an endoscope, the camera device of the endoscope can enter the human body through a tiny incision, and the endoscope light source device connects to a light guide to illuminate the light source into the patient's body, so that the camera device can obtain images.

[0003] At present, an endoscope light source device includes three light-emitting units, a light-combining component and a light-emitting structure. The light-combining component includes three dichroic mirrors and multiple reflectors. The three dichroic mirrors are used to respectively receive the light beams emitted by the three light-emitting units, and cooperate with the multiple reflectors to combine the light beams emitted by the three light-emitting units and guide them to the light-emitting structure.

[0004] However, the structure of the above-mentioned endoscope light source device is relatively complicated. Summary of the invention

[0005] The embodiment of the present application provides an endoscope light source device and an endoscope. The technical solution is as follows:

[0006] According to one aspect of the present application, an endoscope light source device is provided, the endoscope light source device comprising: a plurality of light emitting units, a light combining component and a light output mirror group;

[0007] The light combining component includes a plurality of prisms combined together, the plurality of prisms respectively correspond to the plurality of light emitting units, each of the prisms includes a light incident surface, the plurality of light emitting units are respectively located outside the light incident surface of the corresponding prism, one of the plurality of prisms also includes a light emitting surface, the light emitting mirror group is located outside the light emitting surface, and the light combining component is used for combining the light beams received by the light incident surfaces of the plurality of prisms and directing them to the light emitting surface, and emitting from the light emitting surface and then emitting toward the light emitting mirror group.

[0008] Optionally, the number of the light-emitting units and the number of the prisms are both 3, and the three light-emitting units are respectively a red light-emitting unit, a green light-emitting unit and a blue light-emitting unit.

[0009] Optionally, the three prisms include a first triangular prism, a second triangular prism and a quadrangular prism;

[0010] The quadrangular prism comprises a first surface and a second surface opposite to the first surface, wherein the first surface is a light incident surface of the quadrangular prism;

[0011] The first prism is surrounded by a third surface, a fourth surface and a fifth surface, and the second prism is surrounded by a sixth surface, a seventh surface and an eighth surface. The third surface of the first prism is a light incident surface of the first prism, the fourth surface is arranged opposite to the second surface of the quadrangular prism, the fifth surface is arranged opposite to the seventh surface of the second prism, the sixth surface of the second prism is the light incident surface of the second prism, and the eighth surface is the light exit surface.

[0012] Optionally, the three prisms satisfy:

[0013] 47.3°≤a≤69.54°;

[0014] 23.65°≤c≤34.77°;

[0015] b≥55.2°;

[0016] a=2c;

[0017] 2b-c+d=180°;

[0018] Among them, a is the angle between the sixth surface and the eighth surface, b is the angle in the quadrangular prism adjacent to the target angle of the first triangular prism, the target angle is the angle between the fourth surface and the fifth surface, c is the angle between the seventh surface and the eighth surface, and d is the angle between the third surface and the fifth surface.

[0019] Optionally, the endoscope light source device also includes a first anti-reflection film located on the second surface, a second anti-reflection film located on the seventh surface, a first dichroic film located on the fourth surface, and a second dichroic film located on the fifth surface, the first dichroic film being used to transmit the light beam emitted by the light-emitting unit corresponding to the quadrangular prism, and to reflect the light beam emitted by the light-emitting unit corresponding to the first triangular prism, and the second dichroic film being used to transmit the light beam emitted by the quadrangular prism and the light-emitting unit corresponding to the first triangular prism, and to reflect the light beam emitted by the light-emitting unit corresponding to the second triangular prism.

[0020] Optionally, the endoscope light source device further comprises three collimating lens groups, and the three collimating lens groups are respectively located between the three prisms and the three light-emitting units;

[0021] The collimating lens group includes a first lens, a second lens and a third lens which are arranged in sequence along a direction close to the light combining component, the first lens is a convex lens, the second lens is a meniscus concave lens, and the third lens is a convex lens.

[0022] Optionally, the collimator lens group satisfies:

[0023] 0.02≤1 / f1+(h2 / h1)*(1 / f2)+(h3 / h1)*(1 / f3)≤0.3;

[0024] Among them, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, h1 is the clear aperture of the first lens, h2 is the clear aperture of the second lens, and h3 is the clear aperture of the third lens.

[0025] Optionally, the light output lens group includes a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence in a direction away from the light combining component;

[0026] The fourth lens is a meniscus concave lens, and the fifth lens, the sixth lens, and the seventh lens are convex lenses.

[0027] Optionally, the endoscope light source device further includes an infrared light emitting unit and a dichroic mirror, and the infrared light emitting unit, the dichroic mirror and the sixth lens are arranged in sequence along the optical path direction of the endoscope light source device.

[0028] According to another aspect of an embodiment of the present application, an endoscope is provided, and the endoscope includes the above-mentioned endoscope light source device.

[0029] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0030] By setting a light combining component including a plurality of prisms combined together in the endoscope light source device, and using the plurality of prisms to respectively receive the light beams emitted by the plurality of light emitting units, the light combining component composed of the plurality of prisms can combine the light beams emitted by the plurality of light emitting units and direct them to the light output lens group, and the endoscope light source device is derived from the light output lens group. The endoscope light source device has a simple structure, solves the problem of the relatively complex structure of the endoscope light source device in the related art, and achieves the effect of simplifying the structure of the endoscope light source device.

[0031] In addition, in the light combining assembly composed of multiple dichroic mirrors and multiple reflectors, the angle of each dichroic mirror and reflector needs to be adjusted with high precision during installation, which makes the manufacturing of the endoscope light source device more difficult, and the light beam propagates between the multiple dichroic mirrors and multiple reflectors, and there is a certain distance between the multiple dichroic mirrors and multiple reflectors, which makes the volume of the entire light combining assembly and the endoscope light source device larger. However, in the endoscope light source device provided in the embodiment of the present application, the light combining assembly includes multiple prisms combined together, and the combination of these multiple prisms is simple and quick during installation, which reduces the manufacturing difficulty of the endoscope light source device, and the light combining assembly composed of multiple prisms has a compact structure, which can reduce the volume of the light combining assembly and the endoscope light source device, which is conducive to the miniaturization of the endoscope light source device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 It is a structural schematic diagram of an endoscope light source device provided in an embodiment of the present application;

[0034] Figure 2 is a schematic structural diagram of another endoscope light source device provided in an embodiment of the present application;

[0035] Figure 3 yes Figure 2 A schematic diagram of a light path in a light combining component of an endoscope light source device shown;

[0036] Figure 4 yes Figure 3 Another structural schematic diagram of the light combining component shown;

[0037] Figure 5 yes Figure 2 A schematic structural diagram of another light combining component in an endoscope light source device shown;

[0038] Figure 6 yes Figure 2 A schematic structural diagram of a collimating lens group in an endoscope light source device is shown;

[0039] Figure 7 is a schematic structural diagram of another endoscope light source device provided in an embodiment of the present application;

[0040] Figure 8 is a schematic structural diagram of another endoscope light source device provided in an embodiment of the present application;

[0041] Fig. 9 is a schematic structural diagram of another endoscope light source device provided in an embodiment of the present application;

[0042] Fig.10 is a schematic structural diagram of another endoscope light source device provided in an embodiment of the present application;

[0043] Fig.11 It is a schematic structural diagram of another endoscope light source device provided in an embodiment of the present application.

[0044] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0045] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0046] An endoscope is a detection instrument that includes a camera device, an endoscope light source device, and a display device. It is one of the important surgical instruments in minimally invasive surgery. During the use of the endoscope, the doctor can insert the endoscope into the patient's abdominal cavity, allow the endoscope to reach the lesion location, and use the endoscope light source device for illumination. The image sensor in the display device is then used to capture images, and the captured images are transmitted to the display device for display, so that the doctor can observe the lesion in real time.

[0047] A current endoscope light source device includes three light-emitting units, namely a red light-emitting unit, a green light-emitting unit and a blue light-emitting unit, a light-combining component and a light-emitting structure. The light-combining component includes three dichroic mirrors and multiple reflectors. The three dichroic mirrors are used to respectively receive the light beams emitted by the three light-emitting units, and cooperate with the multiple reflectors to combine the light beams emitted by the three light-emitting units and guide them to the light-emitting structure.

[0048] However, in a light combining assembly composed of a plurality of dichroic mirrors and a plurality of reflectors, the angle of each dichroic mirror and reflector needs to be adjusted with high precision during installation, which makes the manufacture of the endoscope light source device relatively difficult.

[0049] In addition, the light beams of the three reflective units are propagated and combined between a plurality of dichroic mirrors and a plurality of reflective mirrors, and there is a certain distance between the plurality of dichroic mirrors and the plurality of reflective mirrors, which results in a larger volume of the endoscope light source device.

[0050] The embodiments of the present application provide an endoscope light source device and an endoscope, which can solve some problems in the above-mentioned related technologies.

[0051] Figure 1 It is a schematic diagram of the structure of an endoscope light source device provided in an embodiment of the present application, and the endoscope light source device includes: a plurality of light-emitting units 11, a light combining component 12 and a light output mirror group 13.

[0052] The light combining component 12 includes a plurality of prisms 121 combined together, and the plurality of prisms 121 respectively correspond to the plurality of light emitting units 11, each prism 121 includes a light incident surface 1211, and the plurality of light emitting units 11 are respectively located outside the light incident surface 1211 of the corresponding prism 121, and one prism among the plurality of prisms 121 also includes a light emitting surface 1212, and the light emitting mirror group 13 is located outside the light emitting surface 1212. The light combining component 12 is used for combining the light beams received by the light incident surfaces 1211 of the plurality of prisms 121 and directing them to the light emitting surface 1212, and then emitting from the light emitting surface 1212 to the light emitting mirror group 13.

[0053] The light output mirror assembly 13 can output the received light beam to the endoscope light source device to realize the function of the light source.

[0054] Figure 1 In the endoscope light source device shown, the number of light-emitting units 11 and prisms 121 is 3, but the embodiment of the present application is not limited to this, that is, the number of light-emitting units 11 and prisms 121 can be more, such as the number of light-emitting units 11 and prisms 121 can also be 4, 5, 6, 7, 8, 9, 10 or more.

[0055] To summarize, the endoscope light source device provided in the embodiment of the present application comprises a light combining assembly of a plurality of prisms combined together, and the plurality of prisms can respectively receive light beams emitted by a plurality of light emitting units. The light combining assembly composed of the plurality of prisms can combine the light beams emitted by the plurality of light emitting units and direct them to a light output lens group, and the endoscope light source device is derived from the light output lens group. The endoscope light source device has a simple structure, which solves the problem of a relatively complex structure of the endoscope light source device in the related art, and achieves the effect of simplifying the structure of the endoscope light source device.

[0056] In addition, in the light combining assembly composed of multiple dichroic mirrors and multiple reflectors, the angle of each dichroic mirror and reflector needs to be adjusted with high precision during installation, which makes the manufacturing of the endoscope light source device more difficult, and the light beam propagates between the multiple dichroic mirrors and multiple reflectors, and there is a certain distance between the multiple dichroic mirrors and multiple reflectors, which makes the volume of the entire light combining assembly and the endoscope light source device larger. However, in the endoscope light source device provided in the embodiment of the present application, the light combining assembly includes multiple prisms combined together, and the combination of these multiple prisms is simple and quick during installation, which reduces the manufacturing difficulty of the endoscope light source device, and the light combining assembly composed of multiple prisms has a compact structure, which can reduce the volume of the light combining assembly and the endoscope light source device, which is conducive to the miniaturization of the endoscope light source device.

[0057] Figure 2 is a schematic diagram of the structure of another endoscope light source device provided in an embodiment of the present application. Figure 1Some adjustments were made to the endoscope light source arrangement shown.

[0058] Optionally, the number of the light-emitting units 11 and the prism 121 are both 3, and the three light-emitting units 11 may include a first light-emitting unit 111, a second light-emitting unit 112, and a third light-emitting unit 113. One of the first light-emitting unit 111, the second light-emitting unit 112, and the third light-emitting unit 113 is a red light-emitting unit, another light-emitting unit is a green light-emitting unit, and another light-emitting unit is a blue light-emitting unit. The red light-emitting unit can be used to emit red light, the green light-emitting unit can be used to emit green light, the blue light-emitting unit can be used to emit blue light, the red light-emitting unit can be a red light-emitting diode (LED), the green light-emitting unit can be a green light-emitting diode, and the blue light-emitting unit 113 can be a blue light-emitting diode.

[0059] Under such a structure, the red light beam emitted by the red light emitting unit, the green light beam emitted by the green light emitting unit and the blue light beam emitted by the blue light emitting unit are combined in the light combining component 12 to obtain a white light beam.

[0060] In addition, in the endoscope light source device provided in the embodiment of the present application, each light-emitting unit can be a cold light source, so that a multi-light source mixed cold light source device can be realized, so that the endoscope light source device can have a high luminous flux and adjustable color temperature on the basis of a high color rendering index.

[0061] In an exemplary embodiment, the three prisms 121 include a first triangular prism 121 a , a second triangular prism 121 b , and a quadrangular prism 121 c .

[0062] The quadrangular prism 121c includes a first surface m1 and a second surface m2 opposite to the first surface m1. The first surface m1 is a light incident surface of the quadrangular prism 121c. In addition, the quadrangular prism 121c may also include a ninth surface m9 and a tenth surface m10 opposite to each other. The quadrangular prism 121c may be surrounded by the first surface m1, the second surface m2, the ninth surface m9 and the tenth surface m10. The first surface m1 as the light incident surface of the quadrangular prism 121c may be perpendicular to the light beam emitted from the light emitting unit corresponding to the quadrangular prism 121c to the first surface m1 of the quadrangular prism 121c. This may simplify the light path and reduce the difficulty of designing the endoscope light source assembly.

[0063] The first prism 121a is surrounded by a third surface m3, a fourth surface m4 and a fifth surface m5, and the second prism 121b is surrounded by a sixth surface m6, a seventh surface m7 and an eighth surface m8. The third surface m3 of the first prism 121a is the light incident surface of the first prism 121a. The third surface m3, which is the light incident surface of the first prism 121a, can be perpendicular to the light beam emitted by the light-emitting unit corresponding to the first prism 121a to the third surface m3 of the first prism 121a. In this way, the optical path can be simplified and the design difficulty of the endoscope light source assembly can be reduced.

[0064] The fourth surface m4 is arranged opposite to the second surface m2 of the quadrangular prism 121c, the fifth surface m5 is arranged opposite to the seventh surface m7 of the second triangular prism 121b, the sixth surface m6 of the second triangular prism 121b is the light incident surface of the second triangular prism 121b, and the eighth surface m8 is the light emitting surface 1212 of the light combining component 12. Similarly, the sixth surface m6, which is the light incident surface of the second triangular prism 121b, can be perpendicular to the light beam of the sixth surface m6 photographed by the light emitting unit corresponding to the second triangular prism 121b, so that the optical path can be simplified and the design difficulty of the endoscope light source component can be reduced.

[0065] In an exemplary embodiment, Figure 2 In the endoscope light source device shown, the quadrangular prism 121c corresponds to the first light-emitting unit 111, the first triangular prism 121a corresponds to the second light-emitting unit 112, and the second triangular prism 121b corresponds to the third light-emitting unit 113, that is, the first surface m1 of the quadrangular prism 121c is used to receive the light beam emitted by the first light-emitting unit 111, the third surface m3 of the first triangular prism 121a is used to receive the light beam emitted by the second light-emitting unit 112, and the sixth surface m6 of the second triangular prism 121b is used to receive the light beam emitted by the third light-emitting unit 113.

[0066] It should be noted that the two surfaces involved in the embodiments of the present application are arranged relative to each other, which may mean that the two surfaces are parallel and relative to each other, and there may be a certain gap (such as a gap of 0.01 mm) between the two surfaces, or there may be no gap. Exemplarily, the fourth surface m4 of the first prism 121a and the second surface m2 of the quadrangular prism 121c may be parallel and relative to each other, and there may be a gap of 0.01 mm between the fourth surface m4 and the second surface m2, and the fifth surface m5 of the first prism 121a and the seventh surface m7 of the second prism 121b may be parallel and relative to each other, and there may be a gap of 0.01 mm between the fifth surface m5 and the seventh surface m7.

[0067] Figure 3 yes Figure 2 Please refer to the schematic diagram of a light path in the light combining component of the endoscope light source device shown in FIG. Figure 2 and Figure 3 , the light path of the light beam emitted by the first light emitting unit corresponding to the quadrangular prism 121c may include:

[0068] The light enters the quadrangular prism 121c through the first surface m1 and is emitted toward the second surface m2, then sequentially passes through the fourth surface m4 and the fifth surface m2 of the first triangular prism 121a, and sequentially passes through the seventh surface m7 and the eighth surface m8 of the second triangular prism 121b, thereby emitting out of the light combining assembly.

[0069] The light path of the light beam emitted by the second light emitting unit corresponding to the first prism 121a may include:

[0070] The light beam enters the first prism 121a through the third surface m3 and is reflected on the fifth surface m5 and the fourth surface m4 of the first prism 121a in sequence. The light beam reflected from the fourth surface m4 can pass through the fifth surface m5 and enter the second prism 121b from the seventh surface m7, and then exit the second prism 121b from the eighth surface m8 of the second prism 121b.

[0071] The light path of the light beam emitted by the third light emitting unit corresponding to the second prism 121b may include:

[0072] The light beam enters the second prism 121b through the sixth surface m6 and is reflected on the eighth surface m8 and the seventh surface m7 of the second prism 121b in sequence. The light beam reflected from the seventh surface m7 can pass through the eighth surface m8, thereby emitting out of the light combining assembly.

[0073] Depend on Figure 3 It can be seen that the light beams emitted by the first light-emitting unit, the second light-emitting unit and the third light-emitting unit can be combined in these multiple prisms.

[0074] In the endoscope light source device provided in the embodiment of the present application, the Figure 3 The optical path shown is exemplary, as Figure 4 As shown, Figure 4 yes Figure 3 Another structural schematic diagram of a light combining assembly is shown, wherein three prisms (quadrangular prism 121c, first triangular prism 121a and second triangular prism 121b) satisfy:

[0075] 47.3°≤a≤69.54°;

[0076] 23.65°≤c≤34.77°;

[0077] b≥55.2°;

[0078] a=2c;

[0079] 2b-c+d=180°;

[0080] Among them, a is the angle between the sixth face m6 and the eighth face m8 of the second prism 121b, b is the angle in the quadrangular prism 121c adjacent to the target angle e of the first prism 121a, the target angle e is the angle between the fourth face m4 and the fifth face m5 of the first prism 121a, c is the angle between the seventh face m7 and the eighth face m8 of the second prism 121b, and d is the angle between the third face m3 and the fifth face m5 of the first prism 121a.

[0081] When the quadrangular prism 121c, the first triangular prism 121a, and the second triangular prism 121b meet the above conditions, the light combining function can be easily realized.

[0082] Figure 5 yes Figure 2 Please refer to the structural diagram of another light combining component in the endoscope light source device shown in FIG. Figure 2 as well as Figure 5 The endoscope light source device further includes a first dichroic film s1 located on the fourth surface m4 and a second dichroic film s2 located on the fifth surface m5. The first dichroic film s1 is used to transmit the light-emitting unit corresponding to the prism (the light-emitting unit corresponding to the prism can be Figure 2 The light beam emitted by the first light emitting unit 111 in the embodiment of the present invention is reflected by the light emitting unit corresponding to the first prism 121a (the light emitting unit corresponding to the first prism 121a can be Figure 2 The second dichroic film s2 is used to transmit the light beam emitted by the light emitting unit corresponding to the quadrangular prism and the first triangular prism (that is, the light beams emitted by the first light emitting unit 111 and the second light emitting unit 112 can both transmit the second dichroic film s2), and reflect the light beam emitted by the light emitting unit corresponding to the second triangular prism 121b (the light emitting unit corresponding to the second triangular prism 121b can be Figure 2 The light beam emitted by the third light emitting unit 113).

[0083] Based on the differences in the colors of the light beams emitted by the first light emitting unit, the second light emitting unit and the third light emitting unit, the first dichroic film and the second dichroic film may specifically be different film layers.

[0084] Exemplarily, when the first light-emitting unit, the second light-emitting unit and the third light-emitting unit are respectively a green light-emitting unit, a red light-emitting unit and a blue light-emitting unit, the first dichroic film s1 is a dichroic film that transmits green light and reflects red light, and the second dichroic film s2 is a dichroic film that reflects blue light and transmits red light and green light;

[0085] When the first light-emitting unit, the second light-emitting unit and the third light-emitting unit are respectively a red light-emitting unit, a green light-emitting unit and a blue light-emitting unit, the first dichroic film s1 is a dichroic film that transmits red light and reflects green light, and the second dichroic film s2 is a dichroic film that reflects blue light and transmits red light and green light;

[0086] When the first light-emitting unit, the second light-emitting unit and the third light-emitting unit are respectively a green light-emitting unit, a blue light-emitting unit and a red light-emitting unit, the first dichroic film s1 is a dichroic film that transmits green light and reflects blue light, and the second dichroic film s2 is a dichroic film that reflects red light and transmits blue light and green light;

[0087] When the first light-emitting unit, the second light-emitting unit and the third light-emitting unit are respectively a blue light-emitting unit, a green light-emitting unit and a red light-emitting unit, the first dichroic film s1 is a dichroic film that transmits blue light and reflects green light, and the second dichroic film s2 is a dichroic film that reflects red light and transmits blue light and green light.

[0088] By providing the first dichroic film s1 and the second dichroic film s2, the propagation direction of the light can be controlled at the fourth surface m4 and the fifth surface m5, so that the light paths of the light beams emitted by the three light emitting units can be as follows: Figure 3 Of course, the first dichroic film s1 and the second dichroic film s2 may also have other configurations, which are not limited in the present embodiment.

[0089] In an exemplary embodiment, the endoscope light source device may further include a first anti-reflection film s3 located on the second surface m2 and a second anti-reflection film s4 located on the seventh surface m7. The first anti-reflection film s3 located on the second surface m2 may be used to reduce the reflectivity of the light beam emitted by the first light-emitting unit corresponding to the quadrangular prism 121c on the second surface m2, thereby improving the light beam utilization rate of the first light-emitting unit, reducing the power consumption of the endoscope light source device, and improving the heat dissipation effect of the endoscope light source device (because the anti-reflection film allows more light beams to be emitted from the prism rather than consumed in the prism, thereby improving the heat dissipation effect). The second anti-reflection film s4 located on the seventh surface m7 may be used to reduce the reflectivity of the light beam emitted by the third light-emitting unit corresponding to the second triangular prism 121b on the seventh surface m7, thereby improving the light beam utilization rate of the third light-emitting unit, reducing the power consumption of the endoscope light source device, and improving the heat dissipation effect of the endoscope light source device.

[0090] Please refer to Figure 2In an exemplary embodiment, the endoscope light source device also includes three collimating lens groups 14, and the three collimating lens groups 14 are respectively located between three prisms (quadrangular prism 121c, first triangular prism 121a and second triangular prism 121b) and three light-emitting units (first light-emitting unit 111, second light-emitting unit 112 and third light-emitting unit 113); the three collimating lens groups 14 are used to respectively perform beam reduction processing on the light beams emitted by the three light-emitting units to reduce the aperture angle of the light beams, so as to improve the matching effect between the light beams emitted by the light-emitting units and the prisms.

[0091] Specifically, the light beam received by the collimator group 14 from the light-emitting unit can be a light beam with a larger aperture angle (larger than that after being processed by the collimator group 14), so that the utilization rate of the light can be improved, and the collimator group 14 can perform a beam contraction processing on the light beam to reduce the aperture angle of the light beam, so that the light beams emitted by multiple light-emitting units can have a smaller aperture angle (relative to smaller before being processed by the collimator group 14) when combined in the light combining component. After reducing the aperture angle, the transmittance of the light beam in the prism (such as the various dichroic films and anti-reflection films mentioned above) can be improved, thereby further improving the optical efficiency of the endoscope light source device and reducing the heat emitted by the entire endoscope light source device, so that the endoscope light source device can operate stably for a long time.

[0092] Figure 6 yes Figure 2 Please refer to the schematic diagram of the structure of a collimator lens group in the endoscope light source device shown in FIG. Figure 2 as well as Figure 6 In an exemplary embodiment, the collimating lens group 14 includes a first lens 141, a second lens 142 and a third lens 143 arranged in sequence along a direction close to the light combining component 12, the first lens 141 is a convex lens, the second lens 142 is a meniscus concave lens, and the third lens 143 is a convex lens.

[0093] Among them, the first lens 141, the second lens 142 and the third lens 143 can have a variety of structures. For example, one surface of the first lens 141 can be a convex surface, a concave surface, or a plane, and the other surface can be a convex surface; the second lens 142 can be a meniscus concave lens with a convex front and a concave back, or a meniscus concave lens with a concave front and a convex back; the third lens 144 can be a biconvex convex lens, or a plano-convex convex lens.

[0094] In an exemplary embodiment, the collimator lens assembly 14 satisfies:

[0095] 0.02≤1 / f1+(h2 / h1)*(1 / f2)+(h3 / h1)*(1 / f3)≤0.3;

[0096] Among them, f1 is the focal length of the first lens 141 , f2 is the focal length of the second lens 142 , f3 is the focal length of the third lens 143 , h1 is the light-clearing aperture of the first lens 141 , h2 is the light-clearing aperture of the second lens 142 , and h3 is the light-clearing aperture of the third lens 143 .

[0097] When the three lenses in the collimating lens group 14 meet this condition, the effect of reducing the aperture angle of the collimating lens group 14 can be further improved.

[0098] Figure 7 This is a schematic diagram of the structure of another endoscope light source device provided in an embodiment of the present application. Please refer to Figure 7 The light output lens group 13 includes a fourth lens 131 , a fifth lens 132 , a sixth lens 133 and a seventh lens 134 which are sequentially arranged in a direction away from the light combining component 12 .

[0099] The fourth lens 131 is a meniscus concave lens, and the fifth lens 132, the sixth lens 133, and the seventh lens 134 are convex lenses. Optionally, the fourth lens 131 can be a meniscus concave lens with a convex front and a concave back, or a meniscus concave lens with a concave front and a convex back, and the fifth lens 132 can be a biconvex convex lens, or a plano-convex convex lens.

[0100] The fourth lens 131 and the fifth lens 132 can cooperate with the collimating lens group 14 to achieve the collimating effect. The sixth lens 133 and the seventh lens 134 can be a converging lens group in the endoscope light source device, which is used to converge the light beam.

[0101] In an exemplary embodiment, the fourth lens 131 and the fifth lens 132 may satisfy:

[0102] 0.005≤1 / f4+(h5 / h4)*(1 / f4)≤0.05;

[0103] Wherein, f4 is the focal length of the fourth lens 131, h4 is the light aperture of the fourth lens 131, and h5 is the light aperture of the fifth lens 132. With such a structure, the optical performance of the fourth lens 131 and the fifth lens 132 can be improved, thereby improving the light output effect of the endoscope light source device provided in the embodiment of the present application.

[0104] The sixth lens 133 and the seventh lens 134 may satisfy:

[0105] 0.01≤1 / f6+(h7 / h6)*(1 / f7)≤0.3;

[0106] Wherein, f6 is the focal length of the sixth lens 133, h6 is the light aperture of the sixth lens 133, f7 is the focal length of the seventh lens 134, and h7 is the light aperture of the seventh lens 134. With such a structure, the optical performance of the sixth lens 133 and the seventh lens 134 can be improved, thereby improving the light output effect of the endoscope light source device provided in the embodiment of the present application.

[0107] In addition, the light output mirror group 13 can also include a light guide rod 135, which is located on the light output side of the seventh lens 134, and is used to receive the light beam passing through the seventh lens 134 and output the light beam out of the endoscope light source device. The light guide rod 135 can be a double-layer light guide rod, and the light guide rod 135 can be in the shape of a cylinder, a cone, or a polygonal column.

[0108] The endoscope light source device provided in the above embodiment may include a green light emitting unit, a red light emitting unit and a blue light emitting unit. After the light beams emitted by these three light emitting units are combined, white light can be obtained, so that the endoscope light source device can provide a white light source. However, the endoscope light source device provided in the embodiment of the present application may also include a larger number of light emitting units. For example, Figure 8 As shown, Figure 8 It is a schematic diagram of the structure of another endoscope light source device provided in an embodiment of the present application, wherein the endoscope light source device also includes an infrared light emitting unit 15 and a dichroic mirror 16, and the infrared light emitting unit 15, the dichroic mirror 16 and the sixth lens 133 are arranged in sequence along the optical path direction of the endoscope light source device. Specifically, the fifth lens 132, the dichroic mirror 16 and the sixth lens 133 can be arranged in sequence in a direction away from the light combining component 12, and the infrared light emitting unit 15 can be located on the other side of the dichroic mirror 16 and emit light toward the dichroic mirror 16. Exemplarily, the dichroic mirror 16 can be at a 45-degree angle to the main optical axis of the fifth lens 132 and the light emitting direction of the infrared light emitting unit 15, so that the optical path structure can be simplified, which is conducive to the miniaturization of the endoscope light source device.

[0109] The dichroic mirror 16 can be used to reflect the infrared light emitted by the infrared light emitting unit 15, and transmit the red light, green light and blue light emitted by the first light emitting unit 111, the second light emitting unit 112 and the third light emitting unit 113, so that the infrared light emitted by the infrared light emitting unit 15 can be combined with the red light, green light and blue light emitted by the first light emitting unit 111, the second light emitting unit 112 and the third light emitting unit 113 at the dichroic mirror 16. By providing the infrared light emitting unit 113 in the endoscope light source device, the adaptability of the endoscope light source device can be improved so that the endoscope light source device can be applied to various application scenarios.

[0110] In addition, the endoscope light source device may further include a convex lens 17, and the convex lens 17 and the converging lens group (including the sixth lens 133 and the seventh lens 134) may be used to reduce the infrared light emitted by the infrared light emitting unit 15. The convex lens 17 may be moved between the infrared light emitting unit 15 and the dichroic mirror 16 to adjust the light beam emitted by the infrared light emitting unit 15.

[0111] Of course, the endoscope light source device provided in the embodiment of the present application may also be other structures when including an infrared light emitting unit, for example, Fig. 9 As shown, Fig. 9 is a schematic structural diagram of another endoscope light source device provided in an embodiment of the present application, Figure 8 On the basis of the endoscope light source device shown, the light source device also includes three collimating lens groups 14, and the three collimating lens groups 14 can be respectively located between three prisms (quadrangular prism 121c, first triangular prism 121a and second triangular prism 121b) and three light-emitting units (first light-emitting unit 111, second light-emitting unit 112 and third light-emitting unit 113); the three collimating lens groups 14 are used to respectively perform beam reduction processing on the light beams emitted by the three light-emitting units to reduce the aperture angle of the light beam, so as to improve the matching effect between the light beam emitted by the light-emitting unit and the prism.

[0112] The collimator lens group 14 may include a first lens 141, a second lens 142, and a third lens 143 which are sequentially arranged along the direction of each collimator lens group 14 close to the light combining component 12. The first lens 141 may be a convex lens with one surface being convex, concave, or flat, and the other surface being convex; the second lens 142 may be a meniscus concave lens with a convex front and a concave back, or a meniscus concave lens with a concave front and a convex back; the third lens 144 may be a biconvex convex lens, or a plano-convex convex lens. The contents of the collimator lens group 14 may also refer to the above Figure 6 The embodiments shown in the figure will not be described in detail herein.

[0113] In addition, the endoscope light source device provided in the embodiment of the present application can also combine infrared light in other ways, for example, Fig.10 As shown, Fig.10 It is a schematic structural diagram of another endoscope light source device provided in an embodiment of the present application.

[0114] The endoscope light source device further includes an infrared light emitting unit 15 and a dichroic mirror 16, and the fifth lens 15, the dichroic mirror 16 and the sixth lens 133 are sequentially arranged along the light path direction of the endoscope light source device. Specifically, the infrared light emitting unit 15 and the sixth lens 133 can be located on opposite sides of the dichroic mirror 16, respectively, and the fifth lens 132 can be located on the same side of the dichroic mirror 16 as the sixth lens 133.

[0115] The dichroic mirror 16 can be used to transmit the infrared light emitted by the infrared light emitting unit 15, and reflect the red light, green light and blue light emitted by the first light emitting unit 111, the second light emitting unit 112 and the third light emitting unit 113, so that the infrared light emitted by the infrared light emitting unit 15 can be combined with the red light, green light and blue light emitted by the first light emitting unit 111, the second light emitting unit 112 and the third light emitting unit 113 at the dichroic mirror 16. By providing the infrared light emitting unit 113 in the endoscope light source device, the adaptability of the endoscope light source device can be improved, so that the endoscope light source device can be applied to various application scenarios.

[0116] In addition, the endoscope light source device may further include a flat light-transmitting sheet 18, which may be symmetrical with the dichroic mirror 16 about the principal optical axis of the sixth lens 133. Under such a structure, the flat light-transmitting sheet 18 may be used to compensate for the deflection effect of the dichroic mirror 16 on the light beam, so that the infrared light-emitting unit 15 may be able to more accurately combine light with the red light, green light and blue light emitted by the first light-emitting unit 111, the second light-emitting unit 112 and the third light-emitting unit 113.

[0117] like Fig.11 As shown, Fig.11 is a schematic structural diagram of another endoscope light source device provided in an embodiment of the present application, Fig.10 On the basis of the endoscope light source device shown, the light source device also includes three collimating lens groups 14, which can be respectively located between the quadrangular prism 121c and the first light-emitting unit 111, between the first triangular prism 121a and the second light-emitting unit 112, and between the second triangular prism 121b and the third light-emitting unit 113; these three collimating lens groups 14 can be used to respectively perform beam reduction processing on the light beams emitted by the three light-emitting units to reduce the aperture angle of the light beam, so as to improve the matching effect between the light beam emitted by the light-emitting unit and the prism.

[0118] The collimator lens group 14 may include a first lens 141, a second lens 142, and a third lens 143 which are sequentially arranged along the direction of each collimator lens group 14 close to the light combining component 12. The first lens 141 may be a convex lens with one surface being convex, concave, or flat, and the other surface being convex; the second lens 142 may be a meniscus concave lens with a convex front and a concave back, or a meniscus concave lens with a concave front and a convex back; the third lens 144 may be a biconvex convex lens, or a plano-convex convex lens. The contents of the collimator lens group 14 may also refer to the above Figure 6 The embodiments shown in the figure will not be described in detail herein.

[0119] To summarize, the endoscope light source device provided in the embodiment of the present application comprises a light combining assembly of a plurality of prisms combined together, and the plurality of prisms can respectively receive light beams emitted by a plurality of light emitting units. The light combining assembly composed of the plurality of prisms can combine the light beams emitted by the plurality of light emitting units and direct them to a light output lens group, and the endoscope light source device is derived from the light output lens group. The endoscope light source device has a simple structure, which solves the problem of a relatively complex structure of the endoscope light source device in the related art, and achieves the effect of simplifying the structure of the endoscope light source device.

[0120] In addition, in the light combining assembly composed of multiple dichroic mirrors and multiple reflectors, the angle of each dichroic mirror and reflector needs to be adjusted with high precision during installation, which makes the manufacturing of the endoscope light source device more difficult, and the light beam propagates between the multiple dichroic mirrors and multiple reflectors, and there is a certain distance between the multiple dichroic mirrors and multiple reflectors, which makes the volume of the entire light combining assembly and the endoscope light source device larger. However, in the endoscope light source device provided in the embodiment of the present application, the light combining assembly includes multiple prisms combined together, and the combination of these multiple prisms is simple and quick during installation, which reduces the manufacturing difficulty of the endoscope light source device, and the light combining assembly composed of multiple prisms has a compact structure, which can reduce the volume of the light combining assembly and the endoscope light source device, which is conducive to the miniaturization of the endoscope light source device.

[0121] In addition, an embodiment of the present application further provides an endoscope, which may include the endoscope light source device provided in the above embodiment. In addition, the endoscope may also include a device housing, in which the endoscope light source device may be located, and in addition, the endoscope may also include a camera device and a display device.

[0122] In the present application, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise expressly limited.

[0123] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An endoscope light source device, It is characterized in that The endoscope light source device comprises: a plurality of light emitting units, a light combining component and a light output mirror group; The light combining component includes a plurality of prisms combined together, the plurality of prisms respectively correspond to the plurality of light emitting units, each of the prisms includes a light incident surface, the plurality of light emitting units are respectively located outside the light incident surface of the corresponding prism, one of the plurality of prisms also includes a light emitting surface, the light emitting mirror group is located outside the light emitting surface, and the light combining component is used for combining the light beams received by the light incident surfaces of the plurality of prisms and directing them to the light emitting surface, and emitting from the light emitting surface and then emitting toward the light emitting mirror group.

2. The endoscope light source device according to claim 1, It is characterized in that The number of the light emitting units and the number of the prisms are both 3, and the three light emitting units are respectively a red light emitting unit, a green light emitting unit and a blue light emitting unit.

3. The endoscope light source device according to claim 2, It is characterized in that The three prisms include a first triangular prism, a second triangular prism and a quadrangular prism; The quadrangular prism comprises a first surface and a second surface opposite to the first surface, wherein the first surface is a light incident surface of the quadrangular prism; The first prism is surrounded by a third surface, a fourth surface and a fifth surface, and the second prism is surrounded by a sixth surface, a seventh surface and an eighth surface. The third surface of the first prism is a light incident surface of the first prism, the fourth surface is arranged opposite to the second surface of the quadrangular prism, the fifth surface is arranged opposite to the seventh surface of the second prism, the sixth surface of the second prism is the light incident surface of the second prism, and the eighth surface is the light exit surface.

4. The endoscope light source device according to claim 3, It is characterized in that The three prisms satisfy: 47.3°≤a≤69.54°； 23.65°≤c≤34.77°； b≥55.2°； a=2c; 2b-c+d=180°; Among them, a is the angle between the sixth surface and the eighth surface, b is the angle in the quadrangular prism adjacent to the target angle of the first triangular prism, the target angle is the angle between the fourth surface and the fifth surface, c is the angle between the seventh surface and the eighth surface, and d is the angle between the third surface and the fifth surface.

5. The endoscope light source device according to claim 3, It is characterized in that The endoscope light source device also includes a first dichroic film located on the fourth surface and a second dichroic film located on the fifth surface, the first dichroic film being used to transmit the light beam emitted by the light-emitting unit corresponding to the quadrangular prism and reflect the light beam emitted by the light-emitting unit corresponding to the first triangular prism, and the second dichroic film being used to transmit the light beam emitted by the quadrangular prism and the light-emitting unit corresponding to the first triangular prism and reflect the light beam emitted by the light-emitting unit corresponding to the second triangular prism.

6. The endoscope light source device according to claim 2, It is characterized in that The endoscope light source device further comprises three collimating lens groups, and the three collimating lens groups are respectively located between the three prisms and the three light-emitting units; The collimating lens group includes a first lens, a second lens and a third lens which are arranged in sequence along a direction close to the light combining component, the first lens is a convex lens, the second lens is a meniscus concave lens, and the third lens is a convex lens.

7. The endoscope light source device according to claim 6, It is characterized in that The collimator lens group satisfies: 0.02≤1 / f1+(h2 / h1)*(1 / f2)+(h3 / h1)*(1 / f3)≤0.3; Among them, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, h1 is the clear aperture of the first lens, h2 is the clear aperture of the second lens, and h3 is the clear aperture of the third lens.

8. The endoscope light source device according to claim 2, It is characterized in that The light output lens group includes a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged in a direction away from the light combining component; The fourth lens is a meniscus concave lens, and the fifth lens, the sixth lens, and the seventh lens are convex lenses.

9. The endoscope light source device according to claim 8, It is characterized in that The endoscope light source device further includes an infrared light emitting unit and a dichroic mirror. The infrared light emitting unit, the dichroic mirror and the sixth lens are arranged in sequence along the optical path direction of the endoscope light source device.

10. An endoscope, It is characterized in that The endoscope comprises the endoscope light source device according to any one of claims 1 to 9.

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