Adjusting ring assembly, hard lens optical coupler and endoscope system

Abstract

The utility model discloses an adjusting ring assembly, a hard lens optical coupler and an endoscope system, and relates to the technical field of endoscopes. The adjusting ring assembly comprises a barrel, a first adjusting ring and a second adjusting ring. The first adjusting ring and the second adjusting ring are arranged on the barrel body, and the included angle between the first adjusting face used for rotating the first adjusting ring and the included angle between the second adjusting face used for rotating the second adjusting ring are set to be different. In this way, an operator can distinguish the first adjusting ring and the second adjusting ring according to different touch feelings of the first adjusting face and the second adjusting face, so that the operator can be prompted, and the possibility that the operator touches by mistake is avoided or reduced. The problem that in the prior art, an adjusting ring used for zooming and an adjusting ring used for focusing are difficult to distinguish, and consequently an operator is likely to touch mistakenly is solved. The problem can also be solved by applying the adjusting ring assembly to the hard mirror optical coupler. The above problem can also be solved by applying the hard lens optical coupler to an endoscope system.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of endoscope, especially a kind of adjusting ring assembly, rigid mirror optical coupler and endoscope system. BACKGROUND

[0002] The optical coupler can include optical components for focusing light received from the endoscope onto an imaging sensor assembly in the camera. To provide this focusing function, the coupler can include one or more optical components, such as one or more lenses or prisms, which can be moved relative to the camera, the endoscope, or both, to change the focal length.

[0003] In the rigid mirror optical coupler, there is usually an adjusting ring for focusing and / or zooming, and the operator can zoom or focus by rotating the adjusting ring. In the existing rigid mirror optical coupler, the adjusting rings for focusing and zooming are not well distinguished, and there is a problem that the operator is easy to touch by mistake, for example, when the operator wants to rotate the adjusting ring for focusing, the adjusting ring for zooming is easily touched, which brings many inconveniences to the operation process of the operator. SUMMARY

[0004] The utility model discloses a kind of adjusting ring assembly, rigid mirror optical coupler and endoscope system, to at least partially improve the above technical problem.

[0005] To solve the above problems, the utility model adopts the following technical scheme:

[0006] On the one hand, the application embodiment provides an adjusting ring assembly applied to a rigid mirror optical coupler. The adjusting ring assembly comprises a barrel, a first adjusting ring and a second adjusting ring. The inside of the barrel is used to set an optical element. The first adjusting ring is rotatably sleeved on the barrel, and the first adjusting ring has a first adjusting surface away from the barrel. The second adjusting ring is rotatably sleeved on the barrel and located on one side of the first adjusting ring, and the second adjusting ring has a second adjusting surface away from the barrel. The included angle of the first adjusting surface and the second adjusting surface with respect to the barrel is different.

[0007] In one embodiment, the included angle of the first adjusting surface and the second adjusting surface with respect to the barrel is different.

[0008] In one embodiment, the higher end of the first adjusting ring in the axial direction is located on the side away from the second adjusting ring.

[0009] And / or, the higher end of the second adjusting ring in the axial direction is located on the side away from the first adjusting ring.

[0010] In an embodiment, at least one of the first adjustment surface and the second adjustment surface is provided with a positioning structure for positioning a user's finger.

[0011] In an embodiment, the positioning structure is a groove, and a width of an end of the positioning structure close to the end surface is smaller than a width of a middle part of the positioning structure in a radial direction of the barrel.

[0012] In an embodiment, the positioning structure is a groove, and the positioning structure in the first adjustment surface is open at at least one end in an axial direction of the barrel, and the positioning structure in the second adjustment surface is closed in the axial direction of the barrel.

[0013] Or, the positioning structure in the second adjustment surface is open at at least one end in the axial direction of the barrel, and the positioning structure in the first adjustment surface is closed in the axial direction of the barrel.

[0014] In an embodiment, the positioning structure is a groove, the first adjustment surface has a first gap communicating with the positioning structure in the first adjustment surface so that one end of the positioning structure in the axial direction of the barrel is open, and the second adjustment surface has a second gap communicating with the positioning structure in the second adjustment surface so that one end of the positioning structure in the axial direction of the barrel is open.

[0015] The first gap and the second gap are oppositely arranged, and the first gap has a width greater than or smaller than that of the second gap.

[0016] In an embodiment, a length of the first adjustment ring is greater than or smaller than a length of the second adjustment ring in the axial direction of the barrel.

[0017] In another aspect, the embodiments of the present application also provide a hard mirror optical coupler, comprising the adjustment ring assembly and an optical element, wherein the optical element is arranged in the barrel.

[0018] In yet another aspect, the embodiments of the present application also provide a hard mirror optical coupler, comprising the adjustment ring assembly and an optical element, wherein the optical element is arranged in the barrel.

[0019] The technical scheme adopted by the utility model can achieve the following beneficial effects:

[0020] The adjusting ring assembly provided by the embodiment of the application can distinguish the first adjusting ring and the second adjusting ring according to different touch feelings of the first adjusting surface and the second adjusting surface, and can prompt the operator to avoid or reduce the possibility of mistaken touch. The problem that the adjusting ring for zooming and the adjusting ring for focusing are difficult to distinguish in the prior art and the operator is prone to mistaken touch is solved. The adjusting ring assembly is applied to the hard mirror optical coupler, and the problem is also solved. The hard mirror optical coupler is applied to the endoscope system, and the problem is also solved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 A structure schematic diagram of a hard mirror optical coupler in an embodiment of the present application is shown.

[0023] Figure 2 Another view of a structure schematic diagram of a hard mirror optical coupler in an embodiment of the present application is shown.

[0024] Figure 3 A schematic diagram of an angle between the first adjusting surface and the second adjusting surface relative to the barrel of a hard mirror optical coupler in an embodiment of the present application is shown.

[0025] Figure 4 A sectional view of a hard mirror optical coupler in an embodiment of the present application is shown.

[0026] Figure 5 Another view of a structure schematic diagram of a hard mirror optical coupler in an embodiment of the present application is shown.

[0027] Figure 6 A structure schematic diagram of another hard mirror optical coupler in an embodiment of the present application is shown.

[0028] Figure 7 Another view of a structure schematic diagram of another hard mirror optical coupler in an embodiment of the present application is shown.

[0029] Figure 8 A sectional view of another hard mirror optical coupler in an embodiment of the present application is shown.

[0030] Figure 9 A structural block diagram of an endoscope system in an embodiment of the present application is shown.

[0031] In the figure: 1, hard mirror optical coupler; 10, adjusting ring assembly; 110, barrel; 120, first adjusting ring; 121, first adjusting surface; 122, first notch; 130, second adjusting ring; 131, second adjusting surface; 132, second notch; 140, positioning structure; 20, optical element; 2, endoscope system. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0033] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, not to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0034] In the embodiments of the present application, "proximal end" and "distal end" refer to the relative position of each component to the user in the use environment, wherein the end closer to the user is designated as "proximal end" and the end farther from the user is designated as "distal end".

[0035] The optical coupler can include optical components for focusing light received from the endoscope onto an imaging sensor assembly in the camera. To provide this focusing function, the coupler can include one or more optical components, such as one or more lenses or prisms, which can be moved relative to the camera, the endoscope, or both, to change the focal length.

[0036] In a hard mirror optical coupler, there is usually an adjusting ring for focusing and / or zooming, and the operator can zoom or focus by rotating the adjusting ring. In the existing hard mirror optical coupler, the adjusting rings for focusing and zooming are not well distinguished, and there is a problem that the operator is easy to touch the adjusting ring for zooming when intending to rotate the adjusting ring for focusing, which brings much inconvenience to the operation of the operator.

[0037] Specifically, the inventor finds that, in the process of using the hard mirror optical coupler, the operator's gaze is usually not focused on the adjusting ring, but is operated by hand feeling. However, in the existing hard mirror optical coupler, the adjusting ring for focusing and the adjusting ring for zooming have similar structures and similar connection modes with the barrel, which makes it difficult for the operator to distinguish the adjusting ring for focusing and the adjusting ring for zooming in the actual operation process, and is easy to cause the operator to misoperate.

[0038] Based on this, the inventor provides an adjusting ring assembly, a hard mirror optical coupler and an endoscope system. The adjusting ring assembly can rotate a first adjusting ring and a second adjusting ring on a barrel. The first adjusting ring and the second adjusting ring respectively have a first adjusting surface and a second adjusting surface for adjusting, and the inclination angles of the first adjusting surface and the second adjusting surface relative to the barrel are set to be different. In this way, the operator can have different tactile sensations when touching the first adjusting surface and the second adjusting surface, thereby assisting the operator to distinguish the first adjusting surface and the second adjusting surface.

[0039] The adjusting ring assembly, the hard mirror optical coupler and the endoscope system provided by the present application will be described in detail below by combining the accompanying drawings and specific embodiments and application scenarios. Figures 1 to 9 The adjusting ring assembly, the hard mirror optical coupler and the endoscope system provided by the present application will be described in detail below by combining the accompanying drawings and specific embodiments and application scenarios.

[0040] Please also refer to Figures 1-5 The embodiment of the present application provides a hard mirror optical coupler 1, which can include an adjusting ring assembly 10 and an optical element 20, wherein the adjusting ring assembly 10 can include a barrel 110, a first adjusting ring 120 and a second adjusting ring 130.

[0041] Please also refer to Figures 1-5 The inside of the barrel 110 can be used to set the optical element 20, that is, in the embodiment, the optical element 20 can be set in the barrel 110. It should be noted that the specific shape of the barrel 110 is not limited in the embodiment, for example, the barrel 110 can be a square column, and preferably a cylindrical barrel 110. Meanwhile, the specific structure and form of the optical element 20 are not limited in the embodiment, for example, it can be a lens, a mirror, a prism, a diaphragm, etc., which can be set according to the actual situation.

[0042] The first adjusting ring 120 can be rotatably sleeved on the barrel 110. In the embodiment, the first adjusting ring 120 can be connected to the optical element 20 inside the barrel 110 to realize zooming or focusing operation. The first adjusting ring 120 has a first adjusting surface 121 away from the barrel 110, which can be used to contact the fingers of the operator to adjust the first adjusting ring 120.

[0043] The second adjusting ring 130 can be rotatably sleeved on the barrel 110. In the embodiment, the second adjusting ring 130 can be connected to the optical element 20 inside the barrel 110 to realize focusing or zooming operation. The second adjusting ring 130 has a second adjusting surface 131 away from the barrel 110, which can be used to contact the fingers of the operator to adjust the second adjusting ring 130. In the embodiment, the included angles of the first adjusting surface 121 and the second adjusting surface 131 relative to the barrel 110 can be different.

[0044] Please refer to Figure 3 It should be noted that the above-mentioned included angle can refer to the included angle between the tangent direction of the area of the first adjusting surface 121 close to the second adjusting surface 131 and the axial direction of the barrel 110, as shown by a in the figure, and the included angle between the tangent direction of the area of the second adjusting surface 131 close to the first adjusting surface 121 and the axial direction of the barrel 110, as shown by b in the figure.

[0045] For example, in one embodiment, the first adjusting surface 121 can be inclined relative to the barrel 110, and the inclination angle can be set to 30 degrees. The second adjusting surface 131 can be inclined relative to the barrel 110, and the inclination angle can be set to 60 degrees. For another example, in another embodiment, the first adjusting surface 121 can be inclined relative to the barrel 110, and the inclination angle can be set to 30 degrees. The second adjusting surface 131 can be inclined relative to the barrel 110, and the inclination angle can be set to 120 degrees. For another example, in another embodiment, the first adjusting surface 121 can be inclined relative to the barrel 110, and the inclination angle can be set to 30 degrees. The second adjusting surface 131 can be parallel relative to the barrel 110. The specific setting can be made according to the actual situation, which is not limited here.

[0046] Please continue to refer to Figures 1-5Further, in a specific embodiment, when the first adjusting surface 121 and the second adjusting surface 131 are both arranged to be inclined relative to the barrel 110, the first adjusting surface 121 and the second adjusting surface 131 are arranged to be inclined relative to the barrel 110 in different directions, that is, in this embodiment, the first adjusting surface 121 can be arranged to be inclined by 30 degrees relative to the barrel 110, and the second adjusting surface 131 can be arranged to be inclined by 100 degrees relative to the barrel 110. In a preferred embodiment, the first adjusting surface 121 and the second adjusting surface 131 can be arranged to be inclined relative to the barrel 110 in opposite directions, that is, in this embodiment, the first adjusting surface 121 can be arranged to be inclined by 30 degrees relative to the barrel 110, and the second adjusting surface 131 can be arranged to be inclined by 150 degrees relative to the barrel 110, so that the entire adjusting ring assembly 10 is more symmetrical in structure, and the situation that the center of gravity of the adjusting ring assembly 10 is eccentric can be avoided. The specific arrangement can be made according to the actual situation.

[0047] In a more specific embodiment, the higher end of the first adjusting ring 120 in the axial direction is located on the side away from the second adjusting ring 130. It can be understood that, due to the bending characteristics of the finger joints, when the surgeon places the fingers on the second adjusting ring 130, the fingertips can be bent inward in the radial direction of the barrel 110. For the sake of illustration, in this embodiment, the second adjusting ring 130 is designated as one of the second adjusting ring 130 and the first adjusting ring 120 located at the proximal end, and the distal end of the second adjusting ring 130 is lower than the proximal end in the radial direction of the barrel 110, which is more ergonomic and facilitates the surgeon's fingertips to be placed on the second adjusting ring 130 to adjust the second adjusting ring 130. Similarly, the proximal end of the first adjusting ring 120 is higher than the distal end in the radial direction of the barrel 110, which is also more ergonomic and facilitates the surgeon's fingers to be placed on the first adjusting ring 120 after passing the second adjusting ring 130. Similarly, in other embodiments, the higher end of the second adjusting ring 130 in the axial direction is located on the side away from the first adjusting ring 120.

[0048] Please continue to refer to Figures 1-5In addition, in some embodiments, at least one of the first adjustment surface 121 and the second adjustment surface 131 is provided with a positioning structure 140 for positioning a user's finger. The embodiments of the present application do not limit the specific form of the positioning structure 140. For example, in one embodiment, the positioning structure 140 can be a groove on the first adjustment surface 121 and / or the second adjustment surface 131. In another embodiment, the positioning structure 140 can also be a positioning pin or a positioning block provided on the first adjustment surface 121 and / or the second adjustment surface 131. In this embodiment, two adjacent positioning pins or positioning blocks can cooperate to form the positioning structure 140. The specific arrangement can be determined according to actual conditions. For the sake of illustration, the positioning structure 140 is taken as a groove in the following detailed description.

[0049] As described above, the positioning structure 140 is a groove. In the radial direction of the barrel 110, the width of the end surface of the positioning structure 140 is smaller than the width of the middle part of the positioning structure 140. For the sake of illustration, the positioning structure 140 on the first adjustment surface 121 is taken as an example for description. The positioning structure 140 on the second adjustment surface 131 can be arranged in the same way as the positioning structure 140 on the first adjustment surface 121, which is not limited herein. That is, in this embodiment, the depth of the groove on the first adjustment surface 121 can be arranged as a structure with shallow ends and a deep middle part. This can facilitate the surgeon to put the fingertip in the groove and avoid or reduce the disengagement of the fingertip from the groove, so as to adjust the first adjustment ring 120.

[0050] Please refer to Figures 6-8 It can be understood that, in another embodiment, in the axial direction of the barrel 110, the width of the end surface of the positioning structure 140 is smaller than the width of the middle part of the positioning structure 140. For the sake of illustration, the positioning structure 140 on the first adjustment surface 121 is taken as an example for description. The positioning structure 140 on the second adjustment surface 131 can be arranged in the same way as the positioning structure 140 on the first adjustment surface 121, which is not limited herein. That is, in this embodiment, the width of the groove on the first adjustment surface 121 can be arranged as a structure with narrow ends and a wide middle part. This can also facilitate the surgeon to put the fingertip in the groove and avoid or reduce the disengagement of the fingertip from the groove, so as to adjust the first adjustment ring 120.

[0051] Please refer to Figures 6-8 Further, in some embodiments, at least one of the first adjustment surface 121 and the second adjustment surface 131 is provided with a positioning structure 140 for positioning a user's finger. The embodiments of the present application do not limit the specific form of the positioning structure 140. For example, in one embodiment, the positioning structure 140 can be a groove on the first adjustment surface 121 and / or the second adjustment surface 131. In another embodiment, the positioning structure 140 can also be a positioning pin or a positioning block provided on the first adjustment surface 121 and / or the second adjustment surface 131. In this embodiment, two adjacent positioning pins or positioning blocks can cooperate to form the positioning structure 140. The specific arrangement can be determined according to actual conditions. For the sake of illustration, the positioning structure 140 is taken as a groove in the following detailed description.

[0052] For example, in one embodiment, the positioning structure 140 in the first adjusting surface 121 is open at least one end in the axial direction of the barrel 110, and the positioning structure 140 in the second adjusting surface 131 is closed in the axial direction of the barrel 110. Alternatively, the positioning structure 140 in the second adjusting surface 131 is open at least one end in the axial direction of the barrel 110, and the positioning structure 140 in the first adjusting surface 121 is closed in the axial direction of the barrel 110. In the above embodiment, due to the difference of the positioning structure 140 on the first adjusting surface 121 and the second adjusting surface 131, the tactile sensation of the fingers of the operator when touching the first adjusting surface 121 and the second adjusting surface 131 is different, which can also be used to assist the operator to distinguish the first adjusting ring 120 and the second adjusting ring 130.

[0053] Further, in one embodiment, the positioning structure 140 in the first adjusting surface 121 is open at the end close to the second adjusting surface 131, and a first notch 122 is formed at the open end, and the positioning structure 140 in the second adjusting surface 131 close to the first adjusting surface 121 can be open, and a second notch 132 is formed at the open end, that is, in this embodiment, the first notch 122 and the second notch 132 can be oppositely arranged, so that the operator can place the fingers on the second adjusting ring 130, and then exchange the fingers on the first adjusting ring 120 and the second adjusting ring 130 through the first notch 122 and the second notch 132, in this process, the operator can realize the exchange of the fingers on the first adjusting ring 120 and the second adjusting ring 130 without lifting the fingers, which is beneficial to reduce the possibility of finger fatigue after long-time use of the operator.

[0054] Please also refer to Figures 6-8 Further, in some embodiments, the shape structure of the first notch 122 and the second notch 132 can also be different, it should be noted that the shape structure includes but is not limited to notch width, notch depth, etc., which can be set according to actual conditions, which is not limited here.

[0055] Please also refer to Figure 2 and Figure 7 In addition, in one embodiment, the length of the first adjusting ring 120 in the axial direction of the barrel 110 can also be less than the length of the second adjusting ring 130, and the operator can assist in judging the position of the fingers according to the distance of the finger movement, which can also facilitate the operator to distinguish the first adjusting ring 120 and the second adjusting ring 130.

[0056] Please also refer to Figure 5It can be understood that, in other embodiments, the maximum diameter of the first adjusting ring 120 can be greater than the maximum diameter of the second adjusting ring 130, that is, in such embodiments, the maximum height of the first adjusting ring 120 protruding in the radial direction of the barrel 110 is greater than the maximum height of the second adjusting ring 130 protruding in the radial direction of the barrel 110, so that the first adjusting ring 120 and the second adjusting ring 130 can also be distinguished by the operator.

[0057] The adjusting ring assembly 10 and the hard mirror optical coupler 1 provided by the embodiments of the present application can make the operator distinguish the first adjusting ring 120 and the second adjusting ring 130 according to the different tactile feelings of the first adjusting surface 121 and the second adjusting surface 131, and thus can prompt the operator to avoid or reduce the possibility of mistaken touch. The problem that the adjusting rings for zooming and focusing are difficult to distinguish in the prior art and thus the operator is prone to mistaken touch is solved. The adjusting ring assembly 10 described above can also solve the above-mentioned problems when applied to the hard mirror optical coupler 1.

[0058] In addition, referring to Figure 9 The endoscope system 2 provided by the embodiments of the present application also includes the hard mirror optical coupler 1 described above, and thus the endoscope system 2 provided by the embodiments of the present application can also solve the problem that the adjusting rings for zooming and focusing are difficult to distinguish in the prior art and thus the operator is prone to mistaken touch.

[0059] It should be noted that, in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that processes, methods, articles, or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or inherent to such processes, methods, articles, or devices. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article, or device that includes the element.

[0060] In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved, for example, the described methods can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0061] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A tuning ring assembly applied to a hard mirror optical coupler, characterized in that, The adjusting ring assembly comprises: a barrel, an inside of the barrel being used for disposing an optical element; a first adjusting ring, the first adjusting ring being rotationally sleeved on the barrel, the first adjusting ring having a first adjusting surface away from the barrel; and a second adjusting ring, the second adjusting ring being rotationally sleeved on the barrel and being located on a side of the first adjusting ring, the second adjusting ring having a second adjusting surface away from the barrel; wherein an included angle of the first adjusting surface and the second adjusting surface relative to the barrel is different.

2. The adjustment ring assembly of claim 1, wherein, The first adjusting surface and the second adjusting surface have different inclination directions relative to the barrel.

3. The adjustment ring assembly of claim 2, wherein, A higher end of the first adjusting ring in an axial direction is located on a side of the first adjusting ring away from the second adjusting ring. And / or, a higher end of the second adjusting ring in an axial direction is located on a side of the second adjusting ring away from the first adjusting ring.

4. The adjustment ring assembly of claim 1, wherein, At least one of the first adjusting surface and the second adjusting surface is provided with a positioning structure for positioning a user's finger.

5. The adjustment ring assembly of claim 4, wherein, The positioning structure is a groove, a width of a proximal end of the positioning structure relative to an end surface of the barrel is less than a width of a middle part of the positioning structure.

6. The adjustment ring assembly of claim 4, wherein, The positioning structure is a groove, the positioning structure in the first adjusting surface is open at at least one end in an axial direction of the barrel, and the positioning structure in the second adjusting surface is closed in the axial direction of the barrel. Or, the positioning structure in the second adjusting surface is open at at least one end in an axial direction of the barrel, and the positioning structure in the first adjusting surface is closed in the axial direction of the barrel.

7. The adjustment ring assembly of claim 4, wherein, The positioning structure is a groove, the first adjusting surface has a first gap, the first gap is communicated with the positioning structure in the first adjusting surface, so that the positioning structure is open at one end in an axial direction of the barrel, and the second adjusting surface has a second gap, the second gap is communicated with the positioning structure in the second adjusting surface, so that the positioning structure is open at one end in the axial direction of the barrel. The first gap and the second gap are oppositely arranged, and a width of the first gap is greater than or less than a width of the second gap.

8. The adjustment ring assembly of claim 1, wherein, In an axial direction of the barrel, a length of the first adjusting ring is greater than or less than a length of the second adjusting ring.

9. A hard-mirror optical coupler, comprising: An optical coupling device comprising the adjusting ring assembly and the optical element as claimed in any one of claims 1-8.

10. An endoscope system characterized by comprising: An optical coupling device comprising the optical coupling device as claimed in claim 9.

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