Endoscope light source device and endoscope

Abstract

The application 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 combination assembly and a light emitting mirror group. The light combination assembly comprises a plurality of prisms combined together, the plurality of prisms correspond to the plurality of light emitting units respectively, each prism comprises a light inlet surface, the plurality of light emitting units are located outside the light inlet surface of the corresponding prism respectively, one of the plurality of prisms further comprises a light outlet surface, the light emitting mirror group is located outside the light outlet surface, the light combination assembly is used for guiding the light beams received by the light inlet surfaces of the plurality of prisms to the light outlet surface after light combination, and the light beams are emitted from the light outlet surface and then to the light emitting mirror group. The endoscope light source device has a simple structure, solves the problem that the structure of the endoscope light source device in the related art is relatively complex, and achieves the effect of simplifying the structure of the endoscope light source device.

Description

TECHNICAL FIELD

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

[0002] An endoscope is a detection instrument including a camera device, an endoscope light source device, a display device and the like, and is one of important surgical instruments in minimally invasive surgery. In the process of using the endoscope, the camera device of the endoscope can enter the human body through a small incision, and the endoscope light source device can irradiate light into the patient's body through a connected light guide beam so as to obtain images by the camera device.

[0003] The endoscope light source device currently comprises three light emitting units, a light combining assembly and a light emitting structure. The light combining assembly comprises three dichroic mirrors and a plurality of reflecting mirrors. The three dichroic mirrors are used for receiving light beams emitted by the three light emitting units respectively, and the light beams emitted by the three light emitting units are guided to the light emitting structure after being combined by the plurality of reflecting mirrors.

[0004] However, the structure of the above endoscope light source device is relatively complex. SUMMARY

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

[0006] According to an aspect of the present application, an endoscope light source device is provided, which comprises a plurality of light emitting units, a light combining assembly and a light emitting lens group.

[0007] The light combining assembly comprises a plurality of prisms combined together, and the plurality of prisms correspond to the plurality of light emitting units respectively. Each prism comprises an incident light surface, and the plurality of light emitting units are located outside the incident light surface of the corresponding prism. One of the plurality of prisms further comprises an exit light surface, and the light emitting lens group is located outside the exit light surface. The light combining assembly is used for guiding the light beams received by the incident light surfaces of the plurality of prisms to the exit light surface after being combined, and then the light beams are emitted from the exit light surface and directed to the light emitting lens group.

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

[0009] Optionally, the three prisms comprise a first three-prism, a second three-prism and a four-prism.

[0010] The four-prism comprises a first surface and a second surface opposite to the first surface, and the first surface is the incident light surface of the four-prism.

[0011] The first triangular prism is surrounded by a third face, a fourth face and a fifth face, the second triangular prism is surrounded by a sixth face, a seventh face and an eighth face, the third face of the first triangular prism is the light entrance face of the first triangular prism, the fourth face is arranged opposite to the second face of the four-sided prism, the fifth face is arranged opposite to the seventh face of the second triangular prism, the sixth face of the second triangular prism is the light entrance face of the second triangular prism, and the eighth face is the light exit face.

[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] wherein a is the included angle between the sixth face and the eighth face, b is the angle adjacent to the target angle of the first triangular prism in the four-sided prism, the target angle is the included angle between the fourth face and the fifth face, c is the included angle between the seventh face and the eighth face, and d is the included angle between the third face and the fifth face.

[0019] Optionally, the endoscope light source device further comprises a first anti-reflection film on the second face, a second anti-reflection film on the seventh face, a first dichroic film on the fourth face, and a second dichroic film on the fifth face, the first dichroic film is used to transmit the light beams emitted by the corresponding light emitting units of the four-sided prism and reflect the light beams emitted by the corresponding light emitting units of the first triangular prism, and the second dichroic film is used to transmit the light beams emitted by the corresponding light emitting units of the four-sided prism and the first triangular prism and reflect the light beams emitted by the corresponding light emitting units of the second triangular prism.

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

[0021] The collimating mirror group comprises a first lens, a second lens and a third lens arranged in sequence in the direction close to the light combining assembly, 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 collimating mirror group satisfies:

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

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

[0025] Optionally, the light-out lens group comprises a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence in a direction away from the light-combining assembly.

[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 comprises 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 in a light path direction of the endoscope light source device.

[0028] According to another aspect of the embodiments of the present application, an endoscope is provided, which comprises the above-mentioned endoscope light source device.

[0029] The technical scheme provided by the embodiments of the present application has at least the following beneficial effects:

[0030] By arranging the light-combining assembly comprising a plurality of prisms combined together in the endoscope light source device, and by the plurality of prisms to respectively receive the light beams emitted by the plurality of light-emitting units, the light-combining assembly composed of the plurality of prisms can guide the light beams emitted by the plurality of light-emitting units after light combination to the light-out lens group, and the light-out lens group guides the light beams out of the endoscope light source device. The structure of the endoscope light source device is simple, which solves the problem of 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, the angles of each dichroic mirror and each mirror need to be adjusted with high precision when they are installed in the light-combining assembly composed of a plurality of dichroic mirrors and a plurality of mirrors, which leads to a relatively large manufacturing difficulty of the endoscope light source device. In addition, the light beams propagate between the plurality of dichroic mirrors and the plurality of mirrors, and there is a certain spacing between the plurality of dichroic mirrors and the plurality of mirrors, which leads to a relatively large volume of the entire light-combining assembly and the endoscope light source device. However, in the endoscope light source device provided by the embodiments of the present application, the light-combining assembly comprises a plurality of prisms combined together, which is simple and fast to combine when installed, reduces the manufacturing difficulty of the endoscope light source device, and the structure of the light-combining assembly composed of the plurality of prisms is compact, which can reduce the volume of the light-combining assembly and the endoscope light source device, and is conducive to the miniaturization of the endoscope light source device. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of an endoscope light source device provided in an embodiment of this application;

[0034] Figure 2 This is a schematic diagram of another endoscope light source device provided in the embodiments of this application;

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

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

[0037] Figure 5 yes Figure 2 A schematic diagram of another light-combining component in the endoscopic light source device shown;

[0038] Figure 6 yes Figure 2 A schematic diagram of a collimating lens assembly in the endoscopic light source device shown;

[0039] Figure 7 This is a schematic diagram of another endoscope light source device provided in the embodiments of this application;

[0040] Figure 8 This is a schematic diagram of another endoscope light source device provided in the embodiments of this application;

[0041] Figure 9 This is a schematic diagram of another endoscope light source device provided in the embodiments of this application;

[0042] Figure 10 This is a schematic diagram of another endoscope light source device provided in the embodiments of this application;

[0043] Figure 11 This is a schematic diagram of another endoscope light source device provided in the embodiments of this application.

[0044] The specific embodiments of the present application have been shown by the above drawings, and will be described in more detail hereinafter. These drawings and written descriptions are not intended to limit the scope of the concept 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 purposes, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the drawings.

[0046] An endoscope is a detection instrument including a camera, an endoscope light source device and a display device, and is one of important surgical instruments in minimally invasive surgery. In the use of the endoscope, a doctor can insert the endoscope into the abdominal cavity of a patient, so that the endoscope reaches a lesion position, and then illuminates the lesion position using the endoscope light source device, and acquires an image using an image sensor in the display device, and transmits the acquired image to the display device for display, so that the doctor can observe the lesion in real time.

[0047] The endoscope light source device includes three light emitting units, a light combining assembly and a light emitting structure, the three light emitting units are a red light emitting unit, a green light emitting unit and a blue light emitting unit, the light combining assembly includes three dichroic mirrors and a plurality of reflecting mirrors, the three dichroic mirrors are used to receive light beams emitted by the three light emitting units respectively, and the light beams emitted by the three light emitting units are guided to the light emitting structure after being combined by the plurality of reflecting mirrors.

[0048] However, the angle of each dichroic mirror and reflecting mirror in the light combining assembly composed of a plurality of dichroic mirrors and a plurality of reflecting mirrors needs to be adjusted with high precision during installation, which leads to a large manufacturing difficulty of the endoscope light source device.

[0049] In addition, the light beams of the three light emitting units propagate and combine between the plurality of dichroic mirrors and the plurality of reflecting mirrors, and the plurality of dichroic mirrors and the plurality of reflecting mirrors have a certain spacing therebetween, which leads to a large 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 related art.

[0051] Figure 1 is a structural schematic diagram of an endoscope light source device provided by the embodiments of the present application, and the endoscope light source device includes a plurality of light emitting units 11, a light combining assembly 12 and a light emitting mirror group 13.

[0052] The light combination assembly 12 includes a plurality of prisms 121 combined together, the plurality of prisms 121 correspond to the plurality of light emitting units 11 respectively, each prism 121 includes an incident light surface 1211, the plurality of light emitting units 11 are located outside the incident light surface 1211 of the corresponding prism 121 respectively, one of the plurality of prisms 121 further includes an exit light surface 1212, the exit light mirror group 13 is located outside the exit light surface 1212, the light combination assembly 12 is used for guiding the light beams received by the incident light surface 1211 of the plurality of prisms 121 to the exit light surface 1212 after light combination, and then the light beams are emitted to the exit light mirror group 13.

[0053] The exit light mirror group 13 can guide the received light beams out of the endoscope light source device to realize the function of the light source.

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

[0055] In summary, the endoscope light source device provided by the embodiment of the present application includes a light combination assembly composed of a plurality of prisms combined together, the plurality of prisms can receive light beams emitted by a plurality of light emitting units respectively, the light combination assembly composed of the plurality of prisms can guide the light beams emitted by the plurality of light emitting units to the exit light mirror group after light combination, and then the light beams are guided out of the endoscope light source device by the exit light mirror group. The structure of the endoscope light source device is simple, which solves the problem of 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 combination assembly composed of a plurality of dichroic mirrors and a plurality of mirrors, the angle of each dichroic mirror and mirror needs to be adjusted with high precision during installation, which leads to a large manufacturing difficulty of the endoscope light source device, and the light beams propagate between the plurality of dichroic mirrors and the plurality of mirrors, and there is a certain spacing between the plurality of dichroic mirrors and the plurality of mirrors, which leads to a large volume of the entire light combination assembly and the endoscope light source device. In the endoscope light source device provided by the embodiment of the present application, the light combination assembly includes a plurality of prisms combined together, the plurality of prisms are simple and fast to combine during installation, which reduces the manufacturing difficulty of the endoscope light source device, and the structure of the light combination assembly composed of the plurality of prisms is compact, which can reduce the volume of the light combination assembly and the endoscope light source device, and is beneficial to the miniaturization of the endoscope light source device.

[0057] Figure 2 is a structural schematic diagram of another endoscope light source device provided by the embodiment of the present application, which is similar to the endoscope light source device shown in Figure 1Some adjustments are made on the basis of the shown endoscope light source device.

[0058] Optionally, the number of the light emitting units 11 and the prisms 121 is 3, the three light emitting units 11 can 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 is a green light emitting unit, and the other 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, and the blue light emitting unit can be used to emit blue light. The red light emitting unit can be a red light emitting diode (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 can obtain a white light beam after being combined in the light combination assembly 12.

[0060] In addition, in the endoscope light source device provided by 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 high luminous flux and color temperature adjustable effect on the basis of high color rendering index.

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

[0062] The four-prism 121c includes a first face m1 and a second face m2 opposite to the first face m1, the first face m1 is the light entrance face of the four-prism 121c, in addition, the four-prism 121c can also include a ninth face m9 and a tenth face m10, the four-prism 121c can be surrounded by the first face m1, the second face m2, the ninth face m9 and the tenth face m10. As the light entrance face of the four-prism 121c, the first face m1 can be perpendicular to the light beam emitted by the light emitting unit corresponding to the four-prism 121c to the first face m1 of the four-prism 121c, so that the optical path can be simplified and the design difficulty of the endoscope light source assembly can be reduced.

[0063] The first triangular prism 121a is surrounded by a third surface m3, a fourth surface m4 and a fifth surface m5, and the second triangular 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 triangular prism 121a is the light-in surface of the first triangular prism 121a. As the light-in surface of the first triangular prism 121a, the light beam emitted by the light-emitting unit corresponding to the first triangular prism 121a can be perpendicular to the third surface m3 of the first triangular 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 fourth prism 121c, and 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-in surface of the second triangular prism 121b, and the eighth surface m8 is the light-out surface 1212 of the light combination assembly 12. Similarly, as the light-in surface of the second triangular prism 121b, the light beam emitted by the light-emitting unit corresponding to the second triangular prism 121b can be perpendicular to the sixth surface m6 of the second triangular prism 121b. In this way, the optical path can be simplified, and the design difficulty of the endoscope light source assembly can be reduced.

[0065] In an exemplary embodiment, as shown in Figure 2 the endoscope light source device, the fourth 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 fourth 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 can be arranged opposite to each other, that is, the two surfaces are parallel to each other and opposite to each other, and there can be a certain gap (such as a gap of 0.01 millimeters) between the two surfaces. For example, the fourth surface m4 of the first triangular prism 121a and the second surface m2 of the fourth prism 121c can be parallel to each other and opposite to each other, and there can be a gap of 0.01 millimeters between the fourth surface m4 and the second surface m2. The fifth surface m5 of the first triangular prism 121a and the seventh surface m7 of the second triangular prism 121b can be parallel to each other and opposite to each other, and there can be a gap of 0.01 millimeters between the fifth surface m5 and the seventh surface m7.

[0067] Figure 3 is Figure 2 a light path schematic diagram of the light combination assembly of the endoscope light source device shown in Figure 2 and Figure 3 The optical path of the light beam emitted by the first light-emitting unit corresponding to the fourth prism 121c can include:

[0068] The light beam emitted by the first light emitting unit passes through the fourth surface m4 of the first prism 121a and the seventh surface m7 of the second prism 121b, and then is emitted from the eighth surface m8 of the second prism 121b.

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

[0070] The light beam emitted by the first light emitting unit passes through the fourth surface m4 of the first prism 121a and the seventh surface m7 of the second prism 121b, and then is emitted from the eighth surface m8 of the second prism 121b.

[0071] The light path of the light beam emitted by the second light emitting unit corresponding to the first prism 121a can include:

[0072] The light beam emitted by the first light emitting unit passes through the fourth surface m4 of the first prism 121a and the seventh surface m7 of the second prism 121b, and then is emitted from the eighth surface m8 of the second prism 121b.

[0073] The light path of the light beam emitted by the second light emitting unit corresponding to the first prism 121a can include: 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 the plurality of prisms.

[0074] The endoscope light source device provided by the embodiment of the present application can realize the combination of the light beams emitted by the first light emitting unit, the second light emitting unit and the third light emitting unit in a plurality of prisms. Figure 3 The light path shown in the figure is exemplary, for example, Figure 4 As shown in the figure, Figure 4 As shown in the figure, Figure 3 As shown in the figure, another structure diagram of the light combination assembly, wherein the three prisms (the fourth prism 121c, the first prism 121a and the second 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] Wherein, a is the included angle between the sixth face m6 and the eighth face m8 of the second triangular prism 121b, b is the angle adjacent to the target angle e of the first triangular prism 121a in the fourth prism 121c, the target angle e is the included angle between the fourth face m4 and the fifth face m5 of the first triangular prism 121a, c is the included angle between the seventh face m7 and the eighth face m8 of the second triangular prism 121b, and d is the included angle between the third face m3 and the fifth face m5 of the first triangular prism 121a.

[0081] When the fourth prism 121c, the first triangular prism 121a and the second triangular prism 121b satisfy the above conditions, the light combining function can be facilitated.

[0082] Figure 5 is Figure 2 The structure diagram of another light combining assembly in the endoscope light source device is shown in FIG. 6, and the endoscope light source device further comprises a first dichroic film s1 on the fourth face m4 and a second dichroic film s2 on the fifth face m5. Figure 2 and Figure 5 The first dichroic film s1 is used to transmit the light beams emitted by the corresponding light emitting unit of the fourth prism (the corresponding light emitting unit of the fourth prism can be the first light emitting unit 111 in FIG. 1) and reflect the light beams emitted by the corresponding light emitting unit of the first triangular prism 121a (the corresponding light emitting unit of the first triangular prism 121a can be the second light emitting unit 112 in FIG. 1), and the second dichroic film s2 is used to transmit the light beams emitted by the corresponding light emitting units of the fourth 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 beams emitted by the corresponding light emitting unit of the second triangular prism 121b (the corresponding light emitting unit of the second triangular prism 121b can be the third light emitting unit 113 in FIG. 1). Figure 2 Figure 2 Figure 2

[0083] Based on the different colors of the light beams emitted by the first light emitting unit, the second light emitting unit and the third light emitting unit, the above-mentioned first dichroic film and the second dichroic film can be different film layers.

[0084] For example, when the first light emitting unit, the second light emitting unit and the third light emitting unit are green light emitting unit, red light emitting unit and blue light emitting unit in turn, 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 red light emitting unit, green light emitting unit and blue light emitting unit in sequence respectively, the first dichroic film s1 is a red light transmitting and green light reflecting dichroic film, and the second dichroic film s2 is a blue light transmitting and red light and green light reflecting dichroic film.

[0086] When the first light emitting unit, the second light emitting unit and the third light emitting unit are green light emitting unit, blue light emitting unit and red light emitting unit in sequence respectively, the first dichroic film s1 is a green light transmitting and blue light reflecting dichroic film, and the second dichroic film s2 is a red light transmitting and blue light and green light reflecting dichroic film.

[0087] When the first light emitting unit, the second light emitting unit and the third light emitting unit are blue light emitting unit, green light emitting unit and red light emitting unit in sequence respectively, the first dichroic film s1 is a blue light transmitting and green light reflecting dichroic film, and the second dichroic film s2 is a red light transmitting and blue light and green light reflecting dichroic film.

[0088] By setting the first dichroic film s1 and the second dichroic film s2, the propagation direction of the light at the fourth surface m4 and the fifth surface m5 can be controlled, so that the light paths of the light beams emitted by the three light emitting units can be as shown in the figure, and the light beams can be combined. Figure 3 Of course, the first dichroic film s1 and the second dichroic film s2 can also have other setting modes, and the present application embodiment does not limit this.

[0089] In an exemplary embodiment, the endoscope light source device can 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 can be used to reduce the reflectivity of the light beam emitted by the first light emitting unit corresponding to the fourth 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 (since the anti-reflection film can make more light beams exit the prism rather than being consumed in the prism, thereby improving the heat dissipation effect). The second anti-reflection film s4 located on the seventh surface m7 can be used to reduce the reflectivity of the light beam emitted by the third light emitting unit corresponding to the second three-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 further comprises three collimating lens groups 14, each of which is located between one of the three prisms (four-prism 121c, first three-prism 121a, and second three-prism 121b) and one of the 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 shrinking processing on the light beams emitted by the three light emitting units, so as to reduce the aperture angle of the light beams, and improve the matching effect of the light beams emitted by the light emitting units and the prisms.

[0091] Specifically, the collimating lens group 14 receives a light beam with a relatively large aperture angle (relative to the aperture angle after the processing of the collimating lens group 14) from the light emitting unit, so as to improve the utilization rate of light. The collimating lens group 14 can perform beam shrinking processing on the light beam, so as to reduce the aperture angle of the light beam, so that the light beams emitted by the plurality of light emitting units can have a relatively small aperture angle (relative to the aperture angle before the processing of the collimating lens group 14) when the light beams are combined in the combining assembly. After the aperture angle is reduced, the transmittance of the light beams in the prisms (such as various dichroic films and anti-reflection films) can be improved, so as to further improve the optical efficiency of the endoscope light source device and reduce the heat dissipation of the entire endoscope light source device, so that the endoscope light source device can be stably operated for a long time.

[0092] Figure 6 is Figure 2 The structure diagram of a collimating lens group in the endoscope light source device is shown in FIG. 13, and the structure diagram of a collimating lens group in the endoscope light source device is shown in FIG. 14. Figure 2 and Figure 6 In an exemplary embodiment, the collimating lens group 14 comprises a first lens 141, a second lens 142, and a third lens 143 arranged in sequence in the direction close to the combining assembly 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] The first lens 141, the second lens 142, and the third lens 143 can have various structures. For example, one surface of the first lens 141 can be a convex surface, a concave surface, or a flat surface, and the other surface can be a convex surface. The second lens 142 can be a meniscus concave lens with a convex front surface and a concave back surface, or a meniscus concave lens with a concave front surface and a convex back surface. The third lens 144 can be a double-convex convex lens, or a plano-convex convex lens.

[0094] In an exemplary embodiment, the collimating lens group 14 satisfies:

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

[0096] Wherein, 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 aperture of the first lens 141, h2 is the light aperture of the second lens 142, and h3 is the light aperture of the third lens 143.

[0097] When the three lenses in the collimating lens group 14 satisfy the condition, the effect of the collimating lens group 14 on the reduction of the aperture angle can be further improved.

[0098] Figure 7 is another structural schematic diagram of an endoscope light source device provided by the embodiment of the present application, please refer to Figure 7 The light-emitting lens group 13 includes a fourth lens 131, a fifth lens 132, a sixth lens 133, and a seventh lens 134 arranged in sequence in the direction away from the light combining assembly 12.

[0099] Wherein, 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] Wherein, the fourth lens 131 and the fifth lens 132 can cooperate with the collimating lens group 14 to achieve the effect of collimation together. The sixth lens 133 and the seventh lens 134 can be a converging lens group in the endoscope light source device, used for converging the light beam.

[0101] In an exemplary embodiment, the fourth lens 131 and the fifth lens 132 can 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. Further, the light-emitting effect of the endoscope light source device provided by the embodiment of the present application can be improved.

[0104] The sixth lens 133 and the seventh lens 134 can 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. In turn, the light output effect of the endoscope light source device provided in the embodiments of the present application can be improved.

[0107] In addition, the light output lens group 13 can also include a light guide rod 135 located on the light output side of the seventh lens 134 for receiving the light beam transmitted through the seventh lens 134 and guiding 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 embodiments can include a green light emitting unit, a red light emitting unit, and a blue light emitting unit. The light beams emitted by the three light emitting units can be combined to obtain white light, so that the endoscope light source device can provide a white light source. However, the endoscope light source device provided in the embodiments of the present application can also include a larger number of light emitting units. For example, Figure 8 as shown in FIG. 13, Figure 8 is a structural schematic diagram of another endoscope light source device provided in the embodiments of the present application. The endoscope light source device further includes an infrared light emitting unit 15 and a dichroic mirror 16. The infrared light emitting unit 15, the dichroic mirror 16, and the sixth lens 133 are arranged in sequence along the light 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 assembly 12. The infrared light emitting unit 15 can be located on the other side of the dichroic mirror 16 and emit light towards the dichroic mirror 16. For example, the dichroic mirror 16 can form a 45-degree angle with the main optical axis of the fifth lens 132 and the light output direction of the infrared light emitting unit 15. In this way, the optical path structure can be simplified, which is conducive to the miniaturization of the endoscope light source device.

[0109] Wherein, 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. In this way, the infrared light emitted by the infrared light emitting unit 15 and 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 can be combined 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 can further include a convex lens 17, which, together with the converging lens group (including the sixth lens 133 and the seventh lens 134), can be used to perform beam shrinking processing on the infrared light emitted by the infrared light emitting unit 15. The convex lens 17 can 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 by the embodiments of the present application can also have other structures in the case of including an infrared light emitting unit. For example, Figure 9 as shown in the figure, Figure 9 is a structural schematic diagram of another endoscope light source device provided by the embodiments of the present application. Figure 8 As shown in the figure, on the basis of the endoscope light source device shown in the figure, the light source device further includes three collimating lens groups 14, which can be respectively located between three prisms (the four-prism 121c, the first three-prism 121a, and the second three-prism 121b) and three light emitting units (the first light emitting unit 111, the second light emitting unit 112, and the third light emitting unit 113). The three collimating lens groups 14 are used to perform beam shrinking processing on the light beams emitted by the three light emitting units, respectively, so as to reduce the aperture angle of the light beams and improve the matching effect of the light beams emitted by the light emitting units and the prisms.

[0112] The collimating lens group 14 can include a first lens 141, a second lens 142, and a third lens 143 arranged in sequence along the direction of the collimating lens group 14 close to the converging assembly 12. The first lens 141 can be a convex lens with one face being convex, concave, or flat, and the other face being convex. The second lens 142 can be a meniscus concave lens with the front convex and the back concave, or a meniscus concave lens with the front concave and the back convex. The third lens 144 can be a double-convex convex lens or a plano-convex convex lens. The content of the collimating lens group 14 can also refer to the above-described embodiments, which will not be described here again. Figure 6

[0113] In addition, the endoscope light source device provided by the embodiments of the present application can also perform light converging on infrared light in other manners. For example, Figure 10 as shown in the figure, Figure 10 is a structural schematic diagram of another endoscope light source device provided by the embodiments of the present application.

[0114] The endoscope light source device further includes an infrared light emitting unit 15 and a dichroic mirror 16. The fifth lens 132, the dichroic mirror 16, and the sixth lens 133 are arranged in sequence 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 the opposite sides of the dichroic mirror 16, 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 transmits infrared light emitted by the infrared light-emitting unit 15 and reflects red, green, and blue light emitted by the first, second, and third light-emitting units 111, 112, and 113. This allows the infrared light emitted by the infrared light-emitting unit 15 to combine with the red, green, and blue light emitted by the first, second, and third light-emitting units 111, 112, and 113 at the dichroic mirror 16. By incorporating the infrared light-emitting unit 113 into the endoscope light source device, the adaptability of the device is improved, enabling its application in various scenarios.

[0116] In addition, the endoscope light source device may also include a flat light-transmitting plate 18. The flat light-transmitting plate 18 may be symmetrical with the dichroic mirror 16 about the principal optical axis of the sixth lens 133. In this structure, the flat light-transmitting plate 18 can 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 can more accurately combine 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 Figure 11 As shown, Figure 11 This is a schematic diagram of another endoscope light source device provided in the embodiments of this application. Figure 10 Based on the endoscopic light source device shown, the light source device also includes three collimating lens groups 14. The three collimating lens groups 14 can be 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, respectively. These three collimating lens groups 14 can be used to perform beam reduction processing on the light beams emitted by the three light-emitting units, so as to reduce the aperture angle of the light beam and improve the matching effect between the light beam emitted by the light-emitting unit and the prism.

[0118] The collimating lens assembly 14 may include a first lens 141, a second lens 142, and a third lens 143 arranged sequentially along the direction of each collimating lens assembly 14 near the beam 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 that is convex in the front and concave in the back, or a meniscus concave lens that is concave in the front and convex in the back. The third lens 144 may be a biconvex convex lens or a plano-convex convex lens. The contents of the collimating lens assembly 14 may also refer to the above description. Figure 6 The embodiments shown are not repeated here.

[0119] In summary, the endoscope light source device provided by the embodiment of the present application comprises a light combination assembly composed of a plurality of prisms combined together, the plurality of prisms can respectively receive light beams emitted by a plurality of light emitting units, the light combination assembly composed of the plurality of prisms can guide the light beams emitted by the plurality of light emitting units to the light exit mirror group after light combination, and the light exit mirror group guides the endoscope light source device out. The endoscope light source device has a simple structure, solves the problem of 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, the angles of each dichroic mirror and the mirror in the light combination assembly composed of a plurality of dichroic mirrors and a plurality of mirrors need to be adjusted with high precision during installation, which leads to a large manufacturing difficulty of the endoscope light source device, and the light beams propagate between the plurality of dichroic mirrors and the plurality of mirrors, and the plurality of dichroic mirrors and the plurality of mirrors have a certain spacing, which leads to a large volume of the entire light combination assembly and the endoscope light source device. In the endoscope light source device provided by the embodiment of the present application, the light combination assembly comprises a plurality of prisms combined together, the plurality of prisms are simple and fast to combine during installation, which reduces the manufacturing difficulty of the endoscope light source device, and the light combination assembly composed of the plurality of prisms has a compact structure, which can reduce the volume of the light combination assembly and the endoscope light source device, and is beneficial to the miniaturization of the endoscope light source device.

[0121] In addition, the embodiment of the present application also provides an endoscope, which can comprise the endoscope light source device provided by the above-mentioned embodiment. In addition, the endoscope can also comprise a device housing, the endoscope light source device can be located in the device housing, and in addition, the endoscope can also comprise a camera device and a display device.

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

[0123] The above-mentioned only describes optional embodiments of the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, 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 characterized by comprising: The endoscope light source device comprises a plurality of light emitting units, a light combining assembly and a light emitting mirror group; The light combining assembly comprises a plurality of prisms combined together, the plurality of prisms correspond to the plurality of light emitting units respectively, each prism comprises an incident light surface, the plurality of light emitting units are located outside the incident light surface of the corresponding prism respectively, one prism of the plurality of prisms further comprises an emitting surface, the light emitting mirror group is located outside the emitting surface, the light combining assembly is used for guiding the light beams received by the incident light surfaces of the plurality of prisms to the emitting surface after light combination, and then the light beams are emitted from the emitting surface to the light emitting mirror group; The number of the light emitting units and the prisms is 3, and the three light emitting units are red light emitting units, green light emitting units and blue light emitting units respectively; The three prisms comprise a first triangular prism, a second triangular prism and a four-sided prism; The four-sided prism comprises a first surface and a second surface opposite to the first surface, and the first surface is the incident light surface of the four-sided prism; The first triangular prism is surrounded by a third surface, a fourth surface and a fifth surface, the second triangular prism is surrounded by a sixth surface, a seventh surface and an eighth surface, the third surface of the first triangular prism is the incident light surface of the first triangular prism, the fourth surface is arranged opposite to the second surface of the four-sided prism, the fifth surface is arranged opposite to the seventh surface of the second triangular prism, the sixth surface of the second triangular prism is the incident light surface of the second triangular prism, and the eighth surface is the emitting surface; The three prisms satisfy: 47.3°≤a≤69.54°； 23.65°≤c≤34.77°； b≥55.2°； a=2c; 2b-c+d=180°; Wherein, a is the included angle between the sixth surface and the eighth surface, b is the angle adjacent to the target angle of the first triangular prism in the four-sided prism, the target angle is the included angle between the fourth surface and the fifth surface, c is the included angle between the seventh surface and the eighth surface, and d is the included angle between the third surface and the fifth surface.

2. The endoscope light source apparatus according to claim 1, characterized by The endoscope light source device further comprises a first dichroic film on the fourth surface and a second dichroic film on the fifth surface, the first dichroic film is used for transmitting the light beams emitted by the corresponding light emitting unit of the four-sided prism and reflecting the light beams emitted by the corresponding light emitting unit of the first triangular prism, and the second dichroic film is used for transmitting the light beams emitted by the corresponding light emitting units of the four-sided prism and the first triangular prism and reflecting the light beams emitted by the corresponding light emitting unit of the second triangular prism.

3. The endoscope light source apparatus according to claim 1, characterized by The endoscope light source device further comprises three collimating mirror groups, and the three collimating mirror groups are respectively located between the three prisms and the three light emitting units; The collimating mirror group comprises a first lens, a second lens and a third lens arranged in sequence in the direction close to the light combining assembly, the first lens is a convex lens, the second lens is a meniscus concave lens, and the third lens is a convex lens.

4. The endoscope light source apparatus according to claim 3, characterized by The collimating mirror group satisfies: 0.02≤1 / f1+(h2 / h1)*(1 / f2)+(h3 / h1)*(1 / f3)≤0.3; Wherein, 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 light aperture of the first lens, h2 is the light aperture of the second lens, and h3 is the light aperture of the third lens.

5. The endoscope light source apparatus according to claim 1, characterized by The light-out lens group comprises a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence in the direction away from the light combination assembly. The fourth lens is a meniscus concave lens, and the fifth lens, the sixth lens and the seventh lens are convex lenses.

6. The endoscope light source apparatus according to claim 5, characterized by The endoscope light source device further comprises 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 in the light path direction of the endoscope light source device.

7. An endoscope characterized by comprising: The endoscope comprises the endoscope light source device of any one of claims 1 to 6.

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