Optical adapter device and surgical microscope

Abstract

An optical adapter device and an operating microscope with an optical adapter device, comprising a body housing (20) and an optical element group. Both ends of the body housing (20) are used for connection with an operating microscope and a digital imaging device (3). The body housing (20) includes a first housing segment (200) that at least partially extends in the direction of a first axis (a), a second housing segment (201) with one end connected to the other end of the first housing segment (200) and extending at least in the direction of a second axis (b), and a third housing segment (202) with one end connected to the other end of the second housing segment (201) and extending at least in the direction of a third axis (c). The first axis (a) and the third axis (c) each intersect the second axis (b). The optical adapter device is adapted to beam splitters of different structures, suitable for a wider range of microscope bodies, applicable to various digital devices, capable of observing and recording images more clearly, being flexibly operable, improving the diagnosis efficiency, with modular production and assembly, simple structure, good scalability, and low cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and specifically relates to an optical adapter device and an operating microscope equipped with the optical adapter device.

Background Art

[0002] A microscope is a precision optical instrument suitable for observing microscopic substances and is widely used in fields such as scientific research and medicine. In microsurgery, an operating microscope is an indispensable tool for doctors. Considering the needs of clinical research, education, attending consultations, dispute resolution, etc., clear image recording of the surgical process and surgical results is necessary. Currently, a method of adding a beam splitter between the microscope body and the binocular eyepiece tube and adding an optical adapter device to the beam splitter branch to connect digital devices is widely adopted. As shown in FIGS. 1 and 2, many of the existing optical adapters 2' of operating microscopes are L-shaped as a whole and are provided on one or both sides of the microscope body 1'. In the drawings, the upper part of the microscope body 1' is connected to the beam splitter 11', and optical adapters 2' are connected to both sides of the beam splitter 11'. A digital imaging device 3' is connected to the optical adapter 2'. When the beam splitter 11' is connected to a digital camera, the optical adapter 2' can only adjust the angle in the vertical direction and cannot rotate in the horizontal direction. Therefore, it is not suitable for an assistant to record image data during surgery, greatly affects the surgical efficiency, and cannot meet the needs of multi-scene applications.

[0003] In the actual operation process, the user often needs to observe the images captured by the digital device in real time and control the digital device to take photos and videos. However, in most cases, due to the limitation of the operation position, the user needs to turn the head or leave the working position to observe the state of the digital device and cannot control the digital device in a convenient and rapid manner.

[0004] Referring to the surgical microscope disclosed in Patent Publication No. CN211123465U, an existing beam splitter is incorporated into the surgical microscope lens body, a binocular lens barrel is connected to the front side of the microscope lens body, and an optical adapter is connected to the back side of the microscope lens body, which not only promotes the overall balance of the lens, but also enables the operator to conveniently observe the state of the digital device. However, from the perspective of actual production and use, superficially, although this structure can simplify the overall structure of the surgical microscope, it very peculiarly changes the coaxiality of the optical path of the conventional microscope lens body. On the one hand, it greatly increases the complexity of the optical and mechanical structure of such a microscope lens body and the difficulty of optical and mechanical assembly and adjustment, increasing the production and manufacturing costs. On the other hand, the expandability of the microscope is significantly limited, and it is impossible to achieve modular connection.

[0005] Moreover, the specific setting method and parameters of the imaging lens group in the optical path of the digital device are not disclosed. Since the adapter not only plays a role in mechanical connection but also plays a decisive role in optical imaging quality, the specific setting method of its imaging lens group has a very important impact on the compensation and correction effects of optical aberrations such as spherical aberration, coma aberration, chromatic aberration, field curvature, and distortion. Furthermore, optical magnification, aperture, the coincidence of the entrance pupil and exit pupil, peripheral vignetting, etc. all need to comprehensively consider various types of digital devices. Through reasonable setting of the imaging lens group, the digital device can finally obtain excellent image quality.

[0006] Therefore, in combination with the above existing technical problems, it is necessary to provide a new technical solution. Summary of the Invention

[0007] One object of the present invention is to provide an optical adapter device.

[0008] To achieve the above object, the present invention adopts the following technical solution.

[0009] 1. An optical adapter device for connecting a surgical microscope and a digital imaging device, the optical adapter device comprising: a main housing; and a group of optical elements provided inside the main housing, one end of the main housing forming a first connection end for connection to a beam splitter of the surgical microscope and the other end forming a second connection end for connection to the digital imaging device, the optical adapter device comprising: a first housing segment, one end of which forms the first connection end and which extends at least partially in a first axial direction; a second housing segment, one end of which is connected to the other end of the first housing segment and which extends at least in a second axial direction; and a third housing segment, one end of which is connected to the other end of the second housing segment and which forms the second connection end and which extends at least in a third axial direction, the first axis and the third axis each intersect with the second axis.

[0010] In the above technical solution, preferably, the first housing segment and the second housing segment are relatively rotatable around the first axis as a rotation axis, and / or The second housing segment and the third housing segment are relatively rotatable about the second axis as a rotation axis, whereby the optical adapter device can selectively rotate not only in the horizontal direction but also in the vertical direction, and can be rotated 360° to enable observation at any angle.

[0011] In the above technical solution, preferably, the first axis and the third axis are both perpendicular to the second axis.

[0012] In the above technical solution, preferably, in at least one state, the main housing has a C-shape, with the first housing segment and the third housing segment located on the same side of the second housing segment, i.e., the eyepiece and the digital imaging device can be observed simultaneously.

[0013] In the above technical solution, preferably, the optical element group includes a lens group located on at least one of the first axis, the second axis, and the third axis, and a mirror group including a first mirror located at the intersection of the first axis and the second axis and a second mirror located at the intersection of the second axis and the third axis.

[0014] More preferably, the lens group includes a first lens group located on the first axis, a second lens group located on the second axis, and a third lens group located on the third axis.

[0015] In one embodiment of the present application, some parameters and options of the first lens group, the second lens group, and the third lens group are as follows. The focal length f of the first lens group G1 satisfies 150mm < f G1 < 300mm, The focal length f of the second lens group G2 satisfies 0.5 < f G2 / f G1 < 2, The focal length f of the third lens group G3 satisfies 10 < f G1 / f G3 < 30.

[0016] The first lens group is a doublet lens group having positive power, and

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Number

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[0017] More preferably, the first lens group is provided in the first housing segment, the first mirror, the second lens group is provided in the second housing segment, and the second mirror, the third lens group is provided in the third housing segment.

[0018] In one embodiment of the present application, some parameters and options of the first lens group, the second lens group, and the third lens group are as follows. The focal length f of the first lens group G1 satisfies -300 mm < f G1 < -150 mm, The focal length f of the second lens group G2 satisfies -2 < f G2 / f G1 < -0.2, The focal length f of the third lens group G3 satisfies 2 < f G1 / f G3 < 20.

[0019] The first lens group is a doublet lens group having negative power, and

Number

[0020] More preferably, the first lens group is provided in the first housing segment, the second lens group, the first mirror group, and the third lens group are provided in the second housing segment, and the second mirror group is provided in the third housing segment.

[0021] In the above technical solution, preferably, the optical element group includes an image direction conversion mirror group, the image direction conversion mirror group is located on the second axis, is rotatable about the second axis, and the direction of the optical image formed on the light receiving unit of the digital imaging device is adjusted by the image direction conversion mirror group to meet various observation requirements.

[0022] The image direction conversion mirror group can be selected from a Dove prism, a Pechan prism, a right-angle prism, etc.

[0023] More preferably, the second housing segment is provided with a rotating part for rotating the image direction conversion mirror group, the image direction conversion mirror group is connected to the rotating part, and the operation of the rotating part facilitates the rotation operation of the image direction conversion mirror group. The rotating part may be a rotating joint or the like in the main body housing.

[0024] In the above technical solution, preferably, the main body housing is composed of the first housing segment, the second housing segment, and the third housing segment. Thereby, the optical adapter device can meet the structural requirements while being structurally the simplest.

[0025] Another object of the present invention is to provide a surgical microscope, particularly a surgical microscope with an optical adapter device.

[0026] To achieve the above object, the present invention adopts the following technical solution.

[0027] A surgical microscope including a microscope main body and an optical adapter device, wherein the microscope main body includes a microscope body, a beam splitter, and an eyepiece. The beam splitter is connected to the microscope body, and the eyepiece and the optical adapter device are respectively connected to the beam splitter. The optical adapter device is the above optical adapter device.

[0028] In the above technical solution, preferably, the surgical microscope further includes a digital imaging device selected from a mobile phone, a camera, and a tablet computer.

[0029] More preferably, in at least one state, the eyepiece and the digital imaging device face the same side of the microscope body.

[0030] In the above technical solution, preferably, the optical adapter device is removably connected to the beam splitter, and the optical adapter device and the digital imaging device can be selectively connected.

[0031] In the above technical solution, preferably, the beam splitter includes a beam splitter housing having a lens body connection end, an eyepiece connection end, and an adapter connection end, and a beam splitter mirror group provided inside the beam splitter housing. The eyepiece connection end faces the front side of the microscope lens body, the adapter connection end faces the back side of the microscope lens body, the microscope lens body is connected to the lens body connection end, the eyepiece is connected to the eyepiece connection end, and the optical adapter device is connected to the adapter connection end.

[0032] More preferably, the beam splitter mirror group includes a combination of a pentaprism and a Schmidt prism, or a combination of a cube prism and a pentaprism, or a combination of a cube prism, a pentaprism, and an oblique prism, or a combination of a cube prism, a pentaprism, and a right-angle prism, or a combination of a cube prism, a right-angle roof prism, and a right-angle prism.

[0033] By applying the above technical solution, the present invention has the following advantages compared with the background art. 1. The optical adapter device of the present invention can be adapted to beam splitters with different structures and is suitable for a wider range of microscope lens bodies. 2. The optical adapter device of the present invention can be applied to various digital devices, can observe and record images more clearly, and can be operated flexibly, so that the diagnosis efficiency can be improved. 3. The optical adapter device of the present invention has modular production and assembly, a simple structure, good scalability, and low cost.

Brief Description of the Drawings

[0034]

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Embodiments for Carrying Out the Invention

[0035] Hereinafter, based on the accompanying drawings, the technical solution of the present invention will be clearly and completely described. It is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments that can be obtained by those skilled in the art based on the embodiments of the present invention without making inventive efforts belong to the protection scope of the present invention.

[0036] In the description of the present invention, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is the orientation or positional relationship shown based on the accompanying drawings. It is only for the convenience of description of the present invention and for the purpose of simplifying the description, and does not disclose or suggest that the mentioned device or element must have a specific orientation, be configured and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. Note that the terms "first", "second", "third" are only for the purpose of explanation and should not be construed as disclosing or suggesting relative importance.

[0037] The surgical microscope as shown in FIGS. 3, 10, and 13 includes a microscope main body 1, an optical adapter device 2, and a digital imaging device 3. Here, the optical adapter device 2 and the digital imaging device 3 can be detachably connected to the microscope main body 1 as accessories of the surgical microscope and selectively used as needed.

[0038] Hereinafter, the microscope main body 1, the optical adapter device 2, and the digital imaging device 3 will be specifically described in detail.

[0039] Regarding the part of the microscope body 1 The microscope body 1 includes a microscope lens barrel 10, a beam splitter, and an eyepiece lens 12. The beam splitter is connected to the microscope lens barrel 10, and the eyepiece lens 12 and the optical adapter device 2 are respectively connected to the beam splitter. A normal binocular microscope tube is adopted for the eyepiece lens 12.

[0040] In this embodiment, the beam splitter is not incorporated inside the microscope lens barrel 10, and includes a beam splitter housing 110 and a group of beam splitter mirrors provided inside the beam splitter housing 110.

[0041] The beam splitter housing 110 includes a lens barrel connection end 110a located at the bottom of the beam splitter housing 110, an eyepiece connection end 110b facing the front side of the microscope lens barrel 10, that is, located at the front part of the beam splitter housing 110, and an adapter connection end 110c facing the back side of the microscope lens barrel 10, that is, located at the rear part of the beam splitter housing 110. The microscope lens barrel 10 is connected to the lens barrel connection end 110a, the eyepiece lens 12 is connected to the eyepiece connection end 110b, and the optical adapter device 2 is connected to the adapter connection end 110c. In one preferred form, the optical adapter device 2 is removably connected to the adapter connection end 110c. The eyepiece lens 12 and the optical adapter device 2 are respectively located on both the opposing front side and back side of the microscope lens barrel 10, ensuring structural balance in the front and back.

[0042] In one embodiment of the beam splitter mirror group according to this embodiment, as shown in FIGS. 11 and 14, the beam splitter mirror group includes a pentaprism 111a and a Schmidt prism 111b. Specifically, it includes one pentaprism 111a and two Schmidt prisms 111b. The real image light rays from the object enter the microscope body 10 through the large objective lens group, pass through the optical elements in the microscope body 10 such as the magnification system, then reach the pentaprism 111a, and using one reflecting surface of the pentaprism 111a as the light splitting surface, some light rays are directly reflected and enter the eyepiece lens 12, and the other light rays are refracted by the Schmidt prism 111b. Finally, after the optical path of the light rays is adjusted by the Schmidt prism 111b, the final light rays enter the optical adapter device 2. In this embodiment, the light rays split by the beam splitter mirror group are located at the same height.

[0043] In another embodiment of the beam splitter mirror group according to this embodiment, as shown in FIG. 15, the beam splitter mirror group includes a cube prism 111c and a pentaprism 111d. In the height direction, the pentaprism 111d is arranged above the cube prism 111c composed of two right-angled prisms, and the inclined surfaces of the two right-angled prisms are bonded together to form a light splitting surface. The light rays split by the cube prism 111c, a part of them enter the optical adapter device 2, and the other part are reflected by the pentaprism 111d and then enter the eyepiece lens 12. Compared with the form in FIG. 14, this embodiment adopts the cube prism 111c that is generally used for light splitting, so the processing cost is relatively low, and it is possible to avoid the overly long optical path due to multiple reflections in the Schmidt prism 111b, which can contribute to reducing the peripheral vignetting in the imaging optical path. At the same time, since the cube prism 111c is arranged below the pentaprism 111d, it can make full use of the air gap of the original structure to shorten the optical path length and also contribute to reducing the peripheral vignetting in the observation optical path. However, in this embodiment, there is a height difference in the light rays split by the beam splitter mirror group, and the height of the light rays entering the eyepiece lens 12 is higher than the height of the light rays entering the optical adapter device 2.

[0044] In another embodiment of the beam splitter mirror group according to this embodiment, as shown in FIGS. 16 and 17, the beam splitter mirror group includes a cube prism 111c, a pentaprism 111d, and an oblique prism 111e. In the height direction, the pentaprism 111d is disposed above the cube prism 111c composed of two right-angle prisms, and the inclined surfaces of the two right-angle prisms are bonded together to form a light splitting surface. The oblique prism 111e is located between the cube prism 111c and the optical adapter device 2. A part of the light beam split by the cube prism 111c passes through the oblique prism 111e and then enters the optical adapter device 2, and the other part is reflected by the pentaprism 111d and then enters the eyepiece lens 12. Compared with the form in FIG. 15, in this embodiment, by adding the oblique prism 111e, the optical axis of the imaging optical path can be raised, interference of the mechanical structure can be avoided, and at the same time, by using the air gap of the original structure, the optical path becomes compact, the processing cost is low, and in this embodiment, the light beams split by the beam splitter mirror group are also located at the same height.

[0045] In another embodiment of the beam splitter mirror group according to this embodiment, as shown in FIG. 18, the beam splitter mirror group includes a cube prism 111c, a pentaprism 111d, and two right-angle prisms 111f. In the height direction, the pentaprism 111d is disposed above the cube prism 111c composed of two right-angle prisms, and the inclined surfaces of the two right-angle prisms are bonded together to form a light splitting surface. The two right-angle prisms 111f are configured like an oblique prism 111e. The light rays split by the cube prism 111c, after a part of them sequentially passes through the two right-angle prisms 111f, enter the optical adapter device 2, and the other part is reflected by the pentaprism 111d and then enters the eyepiece lens 12. Compared with the form in FIG. 16 in this embodiment, the oblique prism 111e is replaced by the right-angle prism 111f. According to the requirements of the structure, by adjusting the distance between the two right-angle prisms 111f, the height of the optical axis of the imaging optical path can be adjusted, and since the right-angle prisms 111f can be adjusted independently, it facilitates optical fitting. In this embodiment, the optical axis is adjustable in the height direction.

[0046] In another embodiment of the beam splitter mirror group according to this embodiment, as shown in FIG. 19, the beam splitter mirror group includes a cubic prism 111c, a roof prism 111g, and two right prisms 111f. In the height direction, the roof prism 111g is disposed above the cubic prism 111c composed of two right prisms, and the inclined surfaces of the two right prisms are bonded together to form a light splitting surface, and the two right prisms 111f are configured like an oblique prism 111e. The light beam split by the cubic prism 111c, a part of which sequentially passes through the two right prisms 111f and then enters the optical adapter device 2, and the other part is reflected by the roof prism 111g and then enters the eyepiece lens 12. Compared with the form of FIG. 18, in this embodiment, the internal optical path length of the roof prism 111g is shortened by about half compared to the pentaprism 111d, which further contributes to reducing the peripheral aperture eclipse of the observation optical path, and avoids the mirror image phenomenon by two internal reflections. And since the image is rotated 180 degrees, the reverse prism in the optical path of the subsequent binocular telescope barrel can be eliminated, resulting in a low cost overall. In this embodiment, the optical axis is adjustable in the height direction.

[0047] Regarding the part of the optical adapter device 2 The optical adapter device 2 includes a main body housing 20 and an optical element group provided inside the main body housing 20. One end of the main body housing 20 forms a first connection end 20a for connecting to the beam splitter of the microscope main body 1, and the other end of the main body housing 20 forms a second connection end 20b for connecting to the digital imaging device 3.

[0048] Furthermore, the main body housing 20 includes a first housing segment 200 having one end forming the first connection end 20a and at least partially extending in the direction of the first axis a, and a second housing segment 201 having one end connected to the other end of the first housing segment 200 and extending at least in the direction of the second axis b, and One end is connected to the other end of the second housing segment 201, the other end forms a second connection end 20b, and it has a third housing segment 202 that extends at least in the direction of the third axis c.

[0049] In this embodiment, the main body housing consists of a first housing segment 200, a second housing segment 201, and a third housing segment 202, that is, it has a three-segment structure. Thereby, the optical adapter device can meet the structural requirements and at the same time be the simplest in structure.

[0050] The first axis a and the third axis c each intersect the second axis b. In this embodiment, as shown in FIG. 3, both the first axis a and the third axis b are perpendicular to the second axis c. The first axis a and the third axis b extend along the horizontal direction, and the second axis c extends along the vertical direction. Moreover, the main body housing 20 is in at least one state where the first housing segment 200 and the third housing segment 202 are located on the same side of the second housing segment 201, presenting a C shape.

[0051] In this embodiment, as shown in FIGS. 4 and 5, the first housing segment 200 and the second housing segment 201 are relatively rotatable about the first axis a as the rotation axis, and the second housing segment 201 and the third housing segment 202 are relatively rotatable about the second axis b as the rotation axis. Thereby, the optical adapter device can rotate not only in the horizontal direction but also in the vertical direction. To facilitate the implementation of the rotation mode between the housings, the rotation positions of both the first housing segment 200 and the second housing segment 201 are shown as C in FIG. 3, and the rotation positions of both the second housing segment 201 and the third housing segment 202 are shown as D in FIG. 3.

[0052] In addition, in at least one state, the surgical microscope is configured such that the eyepiece 12 and the digital imaging device 3 face the same side of the microscope body 10, allowing the image in the digital imaging device 3 to be observed while observing the eyepiece 12.

[0053] In this way, the digital imaging device 3 can rotate around the horizontal and vertical directions by means of an optical adapter device (on the premise of not interfering with the microscope body), enabling intraoperative images to be observed at 360°, and the direction of the image in the digital imaging device 3 can be adjusted by the rotating part 206, and the image direction can also be adjusted by 360°.

[0054] The optical element group includes a lens group, a mirror group, and an image direction conversion mirror group 215. Specifically, it is as follows.

[0055] The lens group is located on at least one of the first axis a, the second axis b, and the third axis c.

[0056] The mirror group includes a first mirror 213 and a second mirror 214. The first mirror 213 is located at the intersection of the first axis a and the second axis b, and the second mirror 214 is located at the intersection of the second axis b and the third axis c. All the mirrors in the illustrated mirror group adopt right-angled prisms.

[0057] As shown in FIGS. 6 to 8, the image direction conversion mirror group 215 is located on the second axis b and is rotatable about the second axis b. The direction of the optical image formed on the light receiving unit of the digital imaging device 3 is adjusted by the image direction conversion mirror group 215 to meet various observation requirements. The image direction conversion mirror group 215 may be selected from a Dove prism, a Pechan prism, etc. The illustrated image direction conversion mirror group 215 is a Pechan prism.

[0058] This embodiment provides an embodiment regarding the rotation of the image direction conversion mirror group 215. In this embodiment, a rotation part 206 for rotating the image direction conversion mirror group 215 is provided in the main body housing 20. The image direction conversion mirror group 215 is connected to the rotation part 206. By operating the rotation part 206, the rotation operation of the image direction conversion mirror group 215 can be realized. The rotation part 206 may be a rotation joint or the like in the main body housing 20.

[0059] In addition, to the optical element group, one or more of a variable aperture, a color filter, and a polarizer may be added as necessary.

[0060] Regarding the part of the digital imaging device 3 The digital imaging device 3 is selected from a mobile phone 30, a camera 31, and a tablet computer. The digital imaging device 3 may be connected to the second connection end 20b of the main body housing 20 by a method such as fastening with a lock ring or adsorption by magnetic force.

[0061] By the digital imaging device 3, the optical element group of the optical adapter device is realized in different forms. Hereinafter, specifically, the case where the digital imaging device 3 adopts two forms of a mobile phone 30 and a camera 31 will be taken as an example for description.

[0062] When the mobile phone 30 is adopted for the digital imaging device 3 shown in FIGS. 9 to 11, The lens group includes a first lens group 210 located on the first axis a, a second lens group 211 located on the second axis b, and a third lens group 212 located on the third axis c.

[0063] As the optical element group, the first lens group 210 is provided in the first housing segment 200, the first reflecting mirror 213 and the second lens group 211 are provided in the second housing segment 201, and the second reflecting mirror 214 and the third lens group 212 are provided in the third housing segment 202.

[0064] The first lens group 210 is a doublet lens group with positive power, including two lenses L1 and L2 (surface numbers 1 to 3) from the object side. The second lens group 211 is a doublet lens group with positive power, including two lenses L3 and L4 (surface numbers 6 to 8) from the object side. The third lens group 212 includes a doublet lens group with positive power and a single lens, and includes three lenses L5, L6, and L7 (surface numbers 13 to 17) from the object side.

[0065] Some parameters and options of the first lens group 210, the second lens group 211, and the third lens group 221 are as follows. Focal length f of the first lens group G1 Satisfies 150mm < f G1 < 300mm, Focal length f of the second lens group G2 Satisfies 0.5 < f G2 / f G1 < 2, Focal length f of the third lens group G3 Satisfies 10 < f G1 / f G3 < 30,

Number

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Number

[0066] Table 1 shows examples of specific optical structure parameters.

Table 1

[0067] The first mirror 213 in the mirror group is located at the intersection of the first axis a and the second axis b, and the second mirror 214 is located at the intersection of the second axis b and the third axis c.

[0068] The image direction conversion mirror group 215 is located on the second axis b and is rotatable about the second axis b as the rotation axis. The second lens group 211 and the image direction conversion mirror group 215 are sequentially provided along the optical axis direction on the second axis b.

[0069] When the camera 31 is adopted in the digital imaging device 3 shown in FIGS. 12 to 14, The lens group includes a first lens group 210 located on the first axis a, a second lens group 211, and a third lens group 212 located on the second axis b. The first lens group 210 and the second lens group 211 are sequentially provided along the optical axis direction.

[0070] As the optical element group, the first lens group 210 is provided in the first housing segment 200, the second lens group 211, the first mirror 213, and the third lens group 212 are provided in the second housing segment 201, and the second mirror 214 is provided in the third housing segment 202.

[0071] The first lens group 210 is a doublet lens group having a negative power and includes two lenses L1 and L2 (surface numbers 1 to 3) from the object side. The second lens group 211 is a doublet lens group having a positive power and includes two lenses L3 and L4 (surface numbers 4 to 6) from the object side. The third lens group is a doublet lens group having a negative power and includes two lenses L5 and L6 (surface numbers 14 to 16) from the object side.

[0072] Some parameters and options of the first lens group 210, the second lens group 211, and the third lens group 221 are as follows. The focal length f of the first lens group G1 is -300 mm < f G1 < -150 mm, The focal length f of the second lens group G2 is -2 < f G2 / f G1 < -0.2, The focal length f of the third lens group G3 is 2 < f G1 / f G3 < 20,

Number

Number

Number

[0073] Table 2 shows examples of specific optical structure parameters.

Table 2

[0074] The first mirror 213 in the mirror group is located at the intersection of the first axis a and the second axis b, and the second mirror 214 is located at the intersection of the second axis b and the third axis c.

[0075] The image direction conversion mirror group 215 is located on the second axis b and is rotatable about the second axis b as the rotation axis. The image direction conversion mirror group 215 and the second lens group 211 are sequentially provided along the optical axis direction on the second axis b.

[0076] As shown in FIG. 20, in Tables 1 and 2, The radius r is the radius of curvature of the lens surface, The thickness d is the thickness at the center of the lens, Nd is the refractive index of the optical glass for d light (wavelength 589.3 nm), Vd represents the difference in refractive indices for lights of different wavelengths in the same transparent medium. Since white light is composed of lights of various colors with different wavelengths, a special phenomenon called dispersion occurs when the transparent material refracts white light. The Abbe number is an index indicating the dispersion ability of the transparent medium, and the generally used reference standard is the central dispersion, that is, the difference in refractive indices between blue light and red light.

[0077] The Abbe number Vd = (nd - 1) / (nF - nC), nd, nF, and nC are the refractive indices of D light, F light, and C light, respectively.

[0078] D light is yellow light, 589.3 nm, the D line in the sodium spectrum, F light is blue light, 486.1 nm, the F line in the hydrogen spectrum, C light is red light, 656.3 nm, the C line in the hydrogen spectrum.

[0079] The above embodiments are only for explaining the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. This does not limit the protection scope of the present invention. Any equivalent changes or modifications made substantially in accordance with the spirit of the present invention shall be included in the protection scope of the present invention.

Explanation of Reference Numerals

[0080] 1 ··· Microscope body 10 ··· Microscope body 110 ··· Beam splitter housing 110a ··· Body connection end 110b ··· Eyepiece connection end 110c ··· Adapter connection end 111a ··· Pentaprism 111b ··· Schmidt prism 111c ··· Cube prism 111d ··· Pentaprism 111e ··· Rhomboid prism 111f ··· Right-angle prism 111g ··· Right-angle roof prism 12 ··· Eyepiece 2 ··· Optical adapter device 20 ··· Main body housing 20a ··· First connection end 20b ··· Second connection end 200 ··· First housing segment 201 ··· Second housing segment 202 ··· Third housing segment 206 ··· Rotating part 210 ··· First lens group 211 ··· Second lens group 212 ··· Third lens group 213 ··· First reflecting mirror 214 ··· Second reflecting mirror 215 ··· Image direction conversion mirror group 3 ··· Digital imaging device 30 ··· Mobile phone 31 ··· Camera a ··· First axis b ··· Second axis c ··· Third axis 1’ ··· Microscope body 11’ ··· Beam splitter 2’ ··· Optical adapter device 3’ ··· Digital imaging device

Claims

1. An optical adapter device for connecting a surgical microscope and a digital imaging device, comprising a main body housing and an optical element group provided inside the main body housing, one end of the main body housing forming a first connection end for connecting to a beam splitter of a surgical microscope, and the other end forming a second connection end for connecting to a digital imaging device. In the optical adapter device, the main body housing includes: a first housing segment having one end forming the first connection end and at least partially extending in a first axial direction; a second housing segment having one end connected to the other end of the first housing segment and at least extending in a second axial direction; a third housing segment having one end connected to the other end of the second housing segment and the other end forming the second connection end and at least extending in a third axial direction; including wherein the first axis and the third axis each intersect the second axis. An optical adapter device characterized by this.

2. The optical adapter device according to claim 1, wherein the first housing segment and the second housing segment are relatively rotatable about the first axis as a rotation axis.

3. The optical adapter device according to claim 1, wherein the second housing segment and the third housing segment are relatively rotatable about the second axis as a rotation axis.

4. The optical adapter device according to claim 1, wherein both the first axis and the third axis are perpendicular to the second axis.

5. The optical adapter device according to claim 1, wherein in at least one state, the first housing segment and the third housing segment are located on the same side of the second housing segment, presenting a C shape.

6. The optical element group includes: a lens group located on at least one of the first axis, the second axis, and the third axis; a first mirror group including a first mirror located at an intersection of the first axis and the second axis and a second mirror located at an intersection of the second axis and the third axis; including An optical adapter device characterized by this according to claim 1.

7. The lens group includes a first lens group located on the first axis, a second lens group located on the second axis, and a third lens group located on the third axis. The optical adapter device according to claim 6 is characterized by this.

8. The focal length f of the first lens group Ｇ１ satisfies 150 mm < f Ｇ１ < 300 mm, The focal length f of the second lens group Ｇ２ satisfies 0.5 < f Ｇ２ / f Ｇ１ < 2, The focal length f of the third lens group Ｇ３ satisfies 10 < f Ｇ１ / f Ｇ３ < 30 The optical adapter device according to claim 7 is characterized by this.

9. The first lens group is a doublet lens group having a positive power, and 【Number 13】 where R １ is the radius of curvature of the joint surface of the first lens group, φ １ is the effective aperture of the joint surface, The second lens group is a doublet lens group having a positive power, and 【Number 14】 where R ２ is the radius of curvature of the joint surface of the first lens group, φ ２ is the effective aperture of the joint surface The third lens group includes a doublet lens group having a positive power and a single lens, and 【Number 15】 where R ３ is the radius of curvature of the joint surface of the doublet lens group in the third lens group, and φ ３ is the effective aperture of the joint surface. The optical adapter device according to claim 7 is characterized by this.

10. The first lens group is provided in the first housing segment, the second lens group is provided in the second housing segment, and the third lens group is provided in the third housing segment. The optical adapter device according to claim 7 is characterized by this.

11. The lens group includes a first lens group and a second lens group located on the first axis, and a third lens group located on the second axis. The first lens group and the second lens group are sequentially provided along the light ray direction. The optical adapter device according to claim 6 is characterized by this.

12. The focal length f of the first lens group Ｇ１ satisfies -300 mm < f Ｇ１ < -150 mm, The focal length f of the second lens group Ｇ２ satisfies -2 < f Ｇ２ / f Ｇ１ < -0.2, The focal length f of the third lens group Ｇ３ satisfies 2 < f Ｇ１ / f Ｇ３ < 20 The optical adapter device according to claim 11 is characterized by this.

13. The first lens group is a doublet lens group having a negative power, and 【Number 16】 where R １ is the radius of curvature of the joint surface of the first lens group, and φ １ is the effective aperture of the joint surface The second lens group is a doublet lens group having a positive power, and 【Number 17】 where R ２ is the radius of curvature of the joint surface of the first lens group, φ ２ is the effective aperture of the joint surface, The third lens group is a doublet lens group having a negative power, and 【Number 18】 where R ３ is the radius of curvature of the joint surface of the doublet lens group in the third lens group, and φ ３ is the effective aperture of the joint surface. The optical adapter device according to claim 11 is characterized by this.

14. The first lens group is provided in the first housing segment, the second lens group, the first mirror group, and the third lens group are provided in the second housing segment, and the second mirror group is provided in the third housing segment. The optical adapter device according to claim 11 is characterized by this.

15. 2. The optical adapter device according to claim 1, wherein the optical element group includes an image redirecting mirror group for adjusting a direction of an optical image focused on a light receiving unit of the digital imaging device, the image redirecting mirror group being located on the second axis and being rotatable about the second axis as a rotation axis.

16. 16. The optical adapter device of claim 15, wherein the second housing segment is provided with a pivot for rotating the image redirecting mirror group, the image redirecting mirror group being connected to the pivot.

17. 2. The optical adapter apparatus of claim 1, wherein said main body housing comprises said first housing segment, a second housing segment, and a third housing segment.

18. An optical adapter device for connecting a surgical microscope and a digital imaging device, comprising: a main body housing; and an optical element group provided inside the main body housing, One end of the main housing forms a first connection end for connection to a beam splitter of a surgical microscope, and the other end forms a second connection end for connection to a digital imaging device, and the main housing includes a first housing segment having one end forming the first connection end and extending at least partially in a first axial direction, a second housing segment having one end connected to the other end of the first housing segment and extending at least in a second axial direction, and a second housing segment having one end connected to the other end of the second housing segment and extending at least in a third axial direction. and a third housing segment extending from the first housing segment, the first axis and the third axis being both perpendicular to the second axis, the first housing segment and the second housing segment being rotatable relative to each other about the first axis as a rotation axis, and the second housing segment and the third housing segment being rotatable relative to each other about the second axis as a rotation axis, and the main body housing is C-shaped in at least one state, with the first housing segment and the third housing segment being located on the same side of the second housing segment; The optical element group includes: a lens group including a first lens group located on the first axis, a second lens group located on the second axis, and a third lens group located on the third axis, the first lens group being disposed within the first housing segment, the first reflector and the second lens group being disposed within the second housing segment, and the second reflector and the third lens group being disposed within the third housing segment; The focal length f of the first lens group Ｇ１ satisfies 150 mm < f Ｇ１ < 300 mm, and the first lens group is a doublet lens group having positive power, and 【Number 19】 where R １ is the radius of curvature of the joint surface of the first lens group, φ １ is the effective aperture of the joint surface, The focal length f of the second lens group Ｇ２ satisfies 0.5 < f Ｇ２ / f Ｇ１ < 2, and the second lens group is a doublet lens group having positive power, and 【Number 20】 where R ２ is the radius of curvature of the joint surface of the first lens group, φ ２ is the effective aperture of the joint surface, The focal length f of the third lens group Ｇ３ satisfies 10 < f Ｇ１ / f Ｇ３ < 30, and the third lens group includes a doublet lens group having positive power and a single lens, and 【Number 21】 where R ３ is the radius of curvature of the joint surface of the doublet lens group in the third lens group, φ ３ is the effective aperture of the joint surface, and the lens group, a group of reflectors including a first reflector located at an intersection of the first axis and a second axis, and a second reflector located at an intersection of the second axis and a third axis; an image redirecting mirror group for adjusting a direction of an optical image formed on a light receiving unit of the digital imaging device, the image redirecting mirror group being located on the second axis and being rotatable about the second axis; Including, An optical adapter device comprising:

19. An optical adapter device for connecting a surgical microscope and a digital imaging device, comprising: a main body housing; and an optical element group provided inside the main body housing, One end of the main housing forms a first connection end for connection to a beam splitter of a surgical microscope, and the other end forms a second connection end for connection to a digital imaging device, and the main housing includes a first housing segment having one end forming the first connection end and extending at least partially in a first axial direction, a second housing segment having one end connected to the other end of the first housing segment and extending at least in a second axial direction, and a second housing segment having one end connected to the other end of the second housing segment and extending at least in a third axial direction. and a third housing segment extending from the first housing segment, the first axis and the third axis being both perpendicular to the second axis, the first housing segment and the second housing segment being rotatable relative to each other about the first axis as a rotation axis, and the second housing segment and the third housing segment being rotatable relative to each other about the second axis as a rotation axis, and the main body housing is C-shaped in at least one state, with the first housing segment and the third housing segment being located on the same side of the second housing segment; The optical element group includes: It includes a first lens group located on the first axis, a second lens group, and a third lens group located on the second axis. The first lens group and the second lens group are sequentially provided along the light ray direction. The first lens group is provided in the first housing segment, and the second lens group, the first mirror group, and the third lens group are provided in the second housing segment. The second mirror group is provided in the third housing segment. It is a lens group. The focal length f of the first lens group Ｇ１ satisfies -300 mm < f Ｇ１ < -150 mm, and the first lens group is a doublet lens group having a negative power, and 【Number 22】 where R １ is the radius of curvature of the joint surface of the first lens group, φ １ is the effective aperture of the joint surface, The focal length f of the second lens group Ｇ２ satisfies -2 < f Ｇ２ / f Ｇ１ < -0.2, and the second lens group is a doublet lens group having positive power, and 【Number 23】 where R ２ is the radius of curvature of the joint surface of the first lens group, φ ２ is the effective aperture of the joint surface The focal length f of the third lens group Ｇ３ satisfies 2 < f Ｇ１ / f Ｇ３ < 20, and the third lens group is a doublet lens group having a negative power, and 【24 Points】 where R ３ is the radius of curvature of the joint surface of the doublet lens group in the third lens group, and φ ３ is the effective aperture of the joint surface, the lens group, It includes a first mirror located at the intersection of the first axis and the second axis, and a second mirror located at the intersection of the second axis and the third axis. It is a mirror group. It is an image direction conversion mirror group for adjusting the direction of the optical image formed on the light receiving unit of the digital imaging device. It is located on the second axis and is rotatable about the second axis as the rotation axis. It is the image direction conversion mirror group. including An optical adapter device characterized by the above.

20. In a surgical microscope including a microscope body and an optical adapter device, the microscope body includes a microscope body, a beam splitter, and an eyepiece. The beam splitter is connected to the microscope body, and the eyepiece and the optical adapter device are respectively connected to the beam splitter. In the surgical microscope, the optical adapter device is the optical adapter device according to any one of Claims 1 to 17.

21. The surgical microscope according to Claim 20, further including a digital imaging device selected from a mobile phone, a camera, and a tablet computer.

22. The surgical microscope according to Claim 20, characterized in that in at least one state, the eyepiece and the digital imaging device face the same side of the microscope body.

23. The surgical microscope according to Claim 20, characterized in that the optical adapter device is removably connected to the beam splitter.

24. The beam splitter includes a beam splitter housing having a lens body connection end, an eyepiece connection end, and an adapter connection end, and a beam splitter mirror group provided inside the beam splitter housing. The eyepiece connection end faces the front side of the microscope lens body, the adapter connection end faces the back side of the microscope lens body, the microscope lens body is connected to the lens body connection end, the eyepiece is connected to the eyepiece connection end, and the optical adapter device is connected to the adapter connection end. The surgical microscope according to claim 20, characterized in that.

25. The beam splitter mirror group includes a combination of a pentaprism and a Schmidt prism, or a combination of a cube prism and a pentaprism, or a combination of a cube prism, a pentaprism, and an oblique prism, or a combination of a cube prism, a pentaprism, and a right-angle prism, or a combination of a cube prism, a right-angle roof prism, and a right-angle prism. The surgical microscope according to claim 24, characterized in that.

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