Optical adapter and surgical microscope

Abstract

The present application relates to a kind of optical adaptation device and surgical microscope with the optical adaptation device, including main body shell, optical lens group, the two ends of main body shell are used to connect surgical microscope and digital camera equipment, main body shell includes first shell section, second shell section and third shell section, first shell section at least partially extends in first axis direction;Second shell section one end is connected with the other end of first shell section, and second shell section at least extends in second axis direction;Third shell section one end is connected with the other end of second shell section, and third shell section at least extends in third axis direction, first axis, third axis respectively with second axis intersect.The optical adaptation device of the present application is adapted to different structures of beam splitter, is suitable for more extensive microscope body;It is suitable for various digital equipment, and observation and record image are clearer, flexible simultaneously operation, to improve diagnostic efficiency;Modular production, assembly, simple structure, good expansibility, low cost.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to an optical adapter and a surgical microscope equipped with such an optical adapter. Background Technology

[0002] A microscope is a precision optical instrument suitable for observing microscopic substances, and it has a wide range of applications in scientific research, medicine, and other fields. In microsurgery, the surgical microscope is an indispensable tool for doctors. Given the needs of clinical research, teaching, consultation, and dispute resolution, clear image records of the surgical process and results are required. Currently, most solutions involve adding a beam splitter between the microscope body and the binocular tube, and connecting digital devices by adding optical adapters to the beam splitter branches, such as... Figure 1 and Figure 2 As shown. By Figure 1 and Figure 2 It is known that most optical adapters on existing surgical microscopes are L-shaped overall and are located on one or both sides of the microscope head, such as... Figure 1 , 2 As shown, when the beam splitter is connected to a digital camera, the optical adapter can only adjust the angle in the vertical direction and cannot rotate in the horizontal direction. This is not conducive to the assistant recording image data during the operation, which greatly affects the efficiency of the operation and cannot meet the application needs of multiple scenarios.

[0003] In practice, users often need to observe the images captured by the digital device in real time and operate the device to take photos or videos. However, in most cases, due to the limitations of the operating position, users need to turn their heads or even leave their working position to observe the status of the digital device, making it difficult to operate it conveniently and quickly.

[0004] See patent CN211123465U for a surgical microscope. This design integrates an existing beam splitter into the microscope body, with the binoculars connected to the front and the optical adapter to the rear. This improves overall lens balance and allows the operator to easily observe the status of digital devices. However, from a practical production perspective, while this structure superficially simplifies the overall structure of the surgical microscope, it fundamentally alters the coaxial optical path characteristic of traditional microscope bodies, exhibiting significant uniqueness. This greatly increases the complexity of the optical and mechanical structures and the difficulty of optomechanical assembly, raising manufacturing costs. Furthermore, it severely restricts the microscope's scalability, preventing modular connection.

[0005] Since the adapter not only serves as a mechanical connector but also plays a decisive role in optical imaging quality, the specific configuration of its imaging lens group has a significant impact on the compensation and correction of optical aberrations such as spherical aberration, coma, chromatic aberration, field curvature, and distortion. Furthermore, optical magnification, aperture, entrance / exit pupil matching, and edge vignetting all require comprehensive consideration for different types of digital devices. Only through proper configuration of the imaging lens group can the digital device ultimately achieve better image quality.

[0006] Therefore, considering the aforementioned 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.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] An optical adapter for connecting a surgical microscope and a digital camera includes a main housing and an optical lens assembly disposed inside the main housing. One end of the main housing forms a first connection end for connecting to a beam splitter of the surgical microscope, and the other end of the main housing forms a second connection end for connecting to the digital camera. The main housing comprises a first housing segment, a second housing segment, and a third housing segment. One end of the first housing segment forms the first connection end, and the first housing segment extends at least partially in a first axial direction. One end of the second housing segment is connected to the other end of the first housing segment, and the second housing segment extends at least in a second axial direction. One end of the third housing segment is connected to the other end of the second housing segment, and the other end of the third housing segment forms the second connection end. The third housing segment extends at least in a third axial direction, and the first axis and the third axis intersect the second axis.

[0010] Preferably, in the above technical solution, the first outer shell segment and the second outer shell segment can rotate relative to each other using the first shaft as the rotation axis, and / or

[0011] The second and third outer shell sections can rotate relative to each other using the second axis as the rotation axis. This allows the optical adapter to rotate not only horizontally but also selectively vertically, while enabling 360° rotation for observation at any angle.

[0012] Preferably, in the above technical solution, the first axis and the third axis are both perpendicular to the second axis.

[0013] Preferably, in at least one state, the first shell segment and the third shell segment are located on the same side of the second shell segment and present a C-shape.

[0014] Preferably, in the above technical solution, the optical lens assembly includes:

[0015] The lens group is located on at least one of the first axis, the second axis, and the third axis;

[0016] A reflector assembly, comprising a first reflector and a second reflector, wherein the first reflector is located at the intersection of the first axis and the second axis, and the second reflector is located at the intersection of the second axis and the third axis.

[0017] 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.

[0018] In one embodiment of this application, some parameters and selections of the first lens group, the second lens group, and the third lens group are as follows:

[0019] The focal length f of the first lens group G1 Satisfy: 150mm < f G1 <300mm,

[0020] The focal length f of the second lens group G2 Satisfy 0.5 < f G2 / f G1 <2,

[0021] The focal length f of the third lens group G3 Satisfy 10 < f G1 / f G3 <30.

[0022] The first lens group is a cemented doublet with positive optical power, and Where R1 is the radius of curvature of the cemented surface of the first lens group. The effective pore size of the adhesive surface;

[0023] The second lens group is a cemented doublet with positive optical power, and Where R2 is the radius of curvature of the cemented surface of the first lens group. The effective pore size of the adhesive surface;

[0024] The third lens group includes a cemented doublet with positive optical power and a single lens, and Where R3 is the radius of curvature of the cemented surface of the doublet lens group in the third lens group. This refers to the effective pore size of the adhesive surface.

[0025] More preferably, the first lens group is disposed within the first housing segment; the first reflector and the second lens group are disposed within the second housing segment; and the second reflector and the third lens group are disposed within the third housing segment.

[0026] In one embodiment of this application, some parameters and selections of the first lens group, the second lens group, and the third lens group are as follows:

[0027] The focal length f of the first lens group G1 Satisfy: 150mm < f G1 <300mm,

[0028] The focal length f of the second lens group G2 Satisfy 0.5 < f G2 / f G1 <2,

[0029] The focal length f of the third lens group G3 Satisfy 10 < f G1 / f G3 <30.

[0030] The first lens group is a cemented doublet with positive optical power, and Where R1 is the radius of curvature of the cemented surface of the first lens group. The effective pore size of the adhesive surface;

[0031] The second lens group is a cemented doublet with positive optical power, and Where R2 is the radius of curvature of the cemented surface of the first lens group. The effective pore size of the adhesive surface;

[0032] The third lens group includes a cemented doublet with positive optical power and a single lens, and Where R3 is the radius of curvature of the cemented surface of the doublet lens group in the third lens group. This refers to the effective pore size of the adhesive surface.

[0033] More preferably, the first lens group is disposed within the first housing segment; the second lens group, the first reflector group, and the third lens group are disposed within the second housing segment; and the second reflector group is disposed within the third housing segment.

[0034] Preferably, in the above technical solution, the optical lens group includes an image steering lens group, which is located on the second axis and can rotate with the second axis as the pivot. The direction of the optical image imaged on the photosensitive unit of the digital camera device can be adjusted by the image steering lens group to meet different observation requirements.

[0035] The image steering mirror assembly can be selected from Dowell prisms, Behavioral prisms, right-angle prisms, etc.

[0036] More preferably, the second outer shell section is provided with a rotating part for rotating the image rotating lens group. The image rotating lens group is connected to the rotating part. The rotating part facilitates the rotation operation of the image rotating lens group by operating the rotating part. The rotating part can be a rotating joint on the main outer shell, etc.

[0037] Preferably, the main shell of the above technical solution is composed of the first shell segment, the second shell segment and the third shell segment, so that the optical adapter can meet the structural requirements while making the structure as simple as possible.

[0038] Another object of the present invention is to provide a surgical microscope, particularly a surgical microscope with an optical adapter.

[0039] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0040] A surgical microscope includes a microscope body and an optical adapter. The microscope body includes a microscope shaft, a beam splitter, and an eyepiece. The beam splitter is connected to the microscope shaft. The eyepiece and the optical adapter are respectively connected to the beam splitter. The optical adapter is the aforementioned optical adapter.

[0041] Preferably, the surgical microscope described above further includes a digital camera, which is selected from mobile phones, cameras, and tablet computers.

[0042] More preferably, in at least one state, the eyepiece and the digital camera are facing the same side of the microscope body.

[0043] Preferably, in the above technical solution, the optical adapter is detachably connected to the beam splitter, and can be selectively connected to the optical adapter and the digital camera device.

[0044] Preferably, in the above technical solution, the beam splitter includes a beam splitter housing and a beam splitter lens assembly disposed inside the beam splitter housing. The beam splitter housing has a body connection end, an eyepiece connection end, and an adapter connection end. The eyepiece connection end faces the front side of the microscope body, and the adapter connection end faces the rear side of the microscope body. The microscope body is connected to the body connection end, the eyepiece is connected to the eyepiece connection end, and the optical adapter is connected to the adapter connection end.

[0045] More preferably, the beam splitter assembly includes a combination of a pentaprism and a Schmidt prism, or a combination of a cubic prism and a pentaprism.

[0046] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0047] 1. It can be adapted to spectrometers of different structures, making it suitable for a wider range of microscope bodies;

[0048] 2. Applicable to various digital devices, providing clearer image observation and recording, while offering flexible operation, thereby improving diagnostic efficiency; 3. Modular production and assembly, simple structure, good expandability, and low cost. Attached Figure Description

[0049] Appendix Figure 1 , 2 This is a schematic diagram of an existing surgical microscope connected to an optical adapter.

[0050] Appendix Figure 3 This is a cross-sectional schematic diagram of the surgical microscope in this embodiment;

[0051] Appendix Figure 4 This is a schematic diagram showing the relative rotation of the first outer shell and the second outer shell in this embodiment;

[0052] Appendix Figure 5 This is a schematic diagram showing the relative rotation of the second and third outer shells in this embodiment;

[0053] Appendix Figure 6-8 This is a schematic diagram showing the optical image direction of the rotating image steering mirror group on the photosensitive unit of the digital camera device in this embodiment;

[0054] Appendix Figure 9 This is a three-dimensional schematic diagram of Example 1 of the surgical microscope;

[0055] Appendix Figure 10 This is a cross-sectional schematic diagram of the first embodiment of the surgical microscope;

[0056] Appendix Figure 11 This is an optical principle diagram of the first embodiment of the surgical microscope;

[0057] Appendix Figure 12 This is a three-dimensional schematic diagram of the second embodiment of the surgical microscope;

[0058] Appendix Figure 13 This is a cross-sectional schematic diagram of the second embodiment of the surgical microscope;

[0059] Appendix Figure 14 This is a schematic diagram of the optical principle of the surgical microscope in Example 2.

[0060] Appendix Figure 15 This is a schematic diagram of the beam splitter assembly in this embodiment;

[0061] Appendix Figure 16 This is a schematic diagram of the radius and thickness in the optical structure parameters of Examples 1 and 2.

[0062] In the attached diagrams above:

[0063] 1. Microscope body; 10. Microscope body; 110. Beam splitter housing; 110a. Body connection end; 110b. Eyepiece connection end; 110c. Adapter connection end; 111a. Pentagonal prism; 111b. Schmidt prism; 111c. Cubic prism; 111d. Pentagonal prism; 12. Eyepiece;

[0064] 2. Optical adapter; 20. Main body shell; 20a. First connecting end; 20b. Second connecting end; 200. First shell segment; 201. Second shell segment; 202. Third shell 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 turning mirror group;

[0065] 3. Digital video recording equipment; 30. Mobile phones; 31. Cameras;

[0066] a) First axis; b) Second axis; c) Third axis;

[0067] 1' Microscope body; 11' Spectrometer; 2' L-shaped optical adapter; 3' Digital camera equipment. Detailed Implementation

[0068] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0070] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0071] like Figure 3 , 10 A surgical microscope, as shown in Figure 13, includes a microscope body 1, an optical adapter 2, and a digital camera 3. The optical adapter 2 and the digital camera 3 are detachable accessories to the surgical microscope body 1 and can be used selectively as needed. The microscope body 1, the optical adapter 2, and the digital camera 3 are described in detail below.

[0072] Part 1 of the microscope body:

[0073] The microscope body 1 includes a microscope body 10, a beam splitter, and an eyepiece 12. The beam splitter is connected to the microscope body 10, and the eyepiece 12 and the optical adapter 2 are respectively connected to the beam splitter. The eyepiece 12 is a conventional binocular tube.

[0074] In this embodiment: the beam splitter is not integrated into the microscope body 10; it includes a beam splitter housing 110 and a beam splitter assembly disposed inside the beam splitter housing 110. Wherein:

[0075] The beam splitter housing 110 has a body connection end 110a, an eyepiece connection end 110b, and an adapter connection end 110c. The body connection end 110a is located at the bottom of the beam splitter housing 110. The eyepiece connection end 110b faces the front of the microscope body 10, i.e., it is located at the front of the beam splitter housing 110. The adapter connection end 110c faces the rear of the microscope body 10, i.e., it is located at the rear of the beam splitter housing 110. The microscope body 10 is connected to the body connection end 110a, the eyepiece 12 is connected to the eyepiece connection end 110b, and the optical adapter 2 is connected to the adapter connection end 110c. In a preferred embodiment, the optical adapter 2 is detachably connected to the adapter connection end 110c. The eyepiece 12 and the optical adapter 2 are located on opposite front and rear sides of the microscope body 10, respectively, ensuring structural balance.

[0076] One implementation of the beam splitter assembly in this embodiment is as follows: Figure 11 , 14As shown, the beam splitter assembly includes a pentaprism 111a and two Schmidt prisms 111b. Specifically, it consists of one pentaprism 111a and two Schmidt prisms 111b. Rays carrying the real image of the object enter the microscope body 10 through the large objective lens assembly. After passing through optical elements within the microscope body 10, such as the zoom system, they reach the pentaprism 111a. Using one reflective surface of the pentaprism 111a as the beam splitter, a portion of the light is directly reflected into the eyepiece 12, while the other portion is refracted to the Schmidt prism 111b. Finally, after being deflected by the Schmidt prism 111b, the light enters the optical adapter 2. In this embodiment, the rays split by the beam splitter assembly are at the same height.

[0077] One implementation of the beam splitter assembly in this embodiment is as follows: Figure 15 As shown: The beam splitter assembly includes a cubic prism 111c and a pentaprism 111d. In the height direction, the pentaprism 111d is located above the cubic prism 111c. The cubic prism 111c is composed of two right-angle prisms, and the inclined surfaces of the two right-angle prisms are joined to form a beam splitting surface. Part of the light enters the optical adapter 2, and the other part of the light enters the eyepiece 12 after being reflected by the pentaprism 111d. In this embodiment: the light rays split by the beam splitter assembly will form a height difference, and the height of the light entering the eyepiece 12 will be higher than the height of the light entering the optical adapter 2.

[0078] Part of optical adapter 2:

[0079] The optical adapter 2 includes a main housing 20 and an optical lens assembly disposed inside the main housing 20. One end of the main housing 20 forms a first connection end 20a for connecting to the beam splitter of the microscope body 1, and the other end of the main housing 20 forms a second connection end 20b for connecting to the digital camera device 3.

[0080] To elaborate further: the main body shell 20 has:

[0081] First housing segment 200: One end of the first housing segment 200 forms a first connecting end 20a, and the first housing segment 200 extends at least partially in the direction of the first axis a;

[0082] The second housing segment 201 has one end connected to the other end of the first housing segment 200, and the second housing segment 201 extends at least in the direction of the second axis b.

[0083] The third housing segment 202 has one end connected to the other end of the second housing segment 201, and the other end of the third housing segment 202 forms a second connection end 20b. The third housing segment 202 extends at least in the direction of the third axis c.

[0084] In this embodiment, the main shell is composed of a first shell segment 200, a second shell segment 201 and a third shell segment 202, which is a three-segment structure. This allows the optical adapter to meet structural requirements while also making the structure as simple as possible.

[0085] The first axis a and the third axis c intersect the second axis b. In this embodiment: the first axis a and the third axis b are both perpendicular to the second axis c. The first axis a and the third axis b extend horizontally, and the second axis c extends vertically. Furthermore, in at least one state, the first outer shell segment 200 and the third outer shell segment 202 are located on the same side of the second outer shell segment 201 and form a C-shape, as shown below. Figure 3 As shown.

[0086] In this embodiment: the first outer shell segment 200 and the second outer shell segment 201 can rotate relative to each other with the first axis a as the rotation axis, and the second outer shell segment 201 and the third outer shell segment 202 can rotate relative to each other with the second axis b as the rotation axis, so that the optical adapter can rotate not only in the horizontal direction but also in the vertical direction, such as... Figure 4 , 5 As shown. To facilitate the rotation between the outer shells, the rotational positions of the first outer shell segment 200 and the second outer shell segment 201 are shown below. Figure 3 At point C, the rotational positions of the second outer shell section and the third outer shell section 202 are shown in [reference needed]. Figure 3 At point D.

[0087] Furthermore, in at least one state, the eyepiece 12 and the digital camera device 3 of the surgical microscope face the same side of the microscope body 10, so that while observing the eyepiece 12, the image on the digital camera device 3 can also be observed.

[0088] In this way, the digital camera device 3 can rotate around the horizontal and vertical directions (without interfering with the microscope body) through the optical adapter to observe intraoperative images 360°. The direction of the image in the digital camera device 3 can be adjusted by the rotating part 206, and the direction of the image can also be adjusted 360°.

[0089] The optical assembly includes a lens group, a mirror group, and an image-shifting mirror group 215. Specifically:

[0090] The lens group is located on at least one of the first axis a, the second axis b, and the third axis c.

[0091] The mirror assembly 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 mirror assemblies shown in the figure use right-angle prisms.

[0092] The image steering mirror assembly 215 is located on the second axis b and can rotate around the second axis b. The image steering mirror assembly 215 adjusts the direction of the optical image projected onto the photosensitive unit of the digital camera device 3 to meet different observation requirements, such as... Figure 6-8 As shown. The image steering mirror assembly 215 can be selected from Dowell prisms, Behavioral prisms, etc. The image steering mirror assembly 215 shown is a Behavioral prism.

[0093] This embodiment provides an implementation method for rotating image rotating mirror assembly 215: a rotating part 206 for rotating image rotating mirror assembly 215 is provided on the main body shell 20. The image rotating mirror assembly 215 is connected to the rotating part 206. The rotation operation of the image rotating mirror assembly 215 can be realized by operating the rotating part 206. The rotating part 206 can be a rotating joint on the main body shell 20, etc.

[0094] In addition, the optical lens assembly can be customized by adding one or more of the following: variable aperture, color filter, and polarizer.

[0095] Part 3 of the digital camera device:

[0096] The digital camera device 3 is selected from a mobile phone 30, a camera 31, or a tablet computer. The digital camera device 3 can be connected to the second connection end 20b of the main body housing 20 by tightening with a locking ring or by magnetic attraction.

[0097] Depending on the digital camera device 3, the optical lens group of the optical adapter may be implemented in different ways. Two specific embodiments are given below for illustration.

[0098] Example 1:

[0099] like Figure 9-11 As shown: In Example 1, the digital camera device 3 is a mobile phone 30, then:

[0100] The lens group consists of 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.

[0101] The optical lens group is configured as follows: the first lens group 210 is disposed within the first housing section 200; the first reflecting mirror 213 and the second lens group 211 are disposed within the second housing section 201; the second reflecting mirror 214 and the third lens group 212 are disposed within the third housing section 202.

[0102] The first lens group 210 is a cemented doublet with positive optical power, including two lenses L1 and L2 starting from the object side; the second lens group 211 is a cemented doublet with positive optical power, including two lenses L3 and L4 starting from the object side; the third lens group 212 includes a cemented doublet with positive optical power and a single lens, including three lenses L5, L6 and L7 starting from the object side.

[0103] The parameters and selections of the first lens group 210, the second lens group 211, and the third lens group 221 are as follows:

[0104] The focal length of the first lens group is f. G1 Satisfy: 150mm < f G1 <300mm,

[0105] The second lens group has a focal length f. G2 Satisfy 0.5 < f G2 / f G1 <2,

[0106] The third lens group has a focal length f. G3 Satisfy 10 < f G1 / f G3 <30,

[0107] Where R1 is the radius of curvature of the cemented surface of the first lens group. The effective pore size of the glued surface.

[0108] Where R2 is the radius of curvature of the cemented surface of the second lens group. The effective pore size of the glued surface.

[0109] Where R3 is the radius of curvature of the cemented surface of the doublet lens group in the third lens group. This refers to the effective pore size of the adhesive surface.

[0110] Table 1 provides examples of specific optical structure parameters:

[0111] 1 150 2 1.4338 94.996 2 -147.57 1.5 1.8467 23.78 3 -258.8 30 4 Infinity 17 1.5168 64.167 5 Infinity 13 6 Infinity 2 1.4338 94.996 7 -74.05 1.5 1.8467 23.78 8 -85 14 9 Infinity ---- 10 Infinity 24 11 Infinity 17 1.5168 64.167 12 Infinity 14 13 56.89 6 1.4338 94.996 14 -15.642 0.5 15 12.489 5.5 1.4338 94.996 16 -13.656 1.5 1.8467 23.78 17 -25.52 ---

[0112] The first reflector 213 in the reflector group is located at the intersection of the first axis a and the second axis b, and the second reflector 214 is located at the intersection of the second axis b and the third axis c.

[0113] The image steering mirror group 215 is located on the second axis b and can rotate with the second axis b as the axis of rotation. The second lens group 211 and the image steering mirror group 215 are arranged sequentially on the second axis b along the light direction.

[0114] Example 2:

[0115] like Figure 12-14 As shown: In Embodiment 2, the digital video recording device 3 uses camera 31, then:

[0116] The lens group consists of a first lens group 210 and a second lens group 211 located on the first axis a, and a third lens group 212 located on the second axis b. The first lens group 210 and the second lens group 211 are arranged sequentially along the light direction.

[0117] The optical lens group is configured as follows: the first lens group 210 is disposed within the first housing section 200; the second lens group 211, the first reflecting mirror group 213, and the third lens group 212 are disposed within the second housing section 201; and the second reflecting mirror group 214 is disposed within the third housing section 202.

[0118] The first lens group 210 is a cemented doublet with negative optical power, including two lenses L1 and L2 starting from the object side; the second lens group 211 is a cemented doublet with positive optical power, including two lenses L3 and L4 starting from the object side; the third lens group is a cemented doublet with negative optical power, including two lenses L5 and L6 starting from the object side.

[0119] The parameters and selections of the first lens group 210, the second lens group 211, and the third lens group 221 are as follows:

[0120] The focal length of the first lens group is f. G1 Satisfy: -300mm < f G1 <-150mm,

[0121] The second lens group has a focal length f. G2 Satisfy -2 < f G2 / f G1 <-0.2,

[0122] The third lens group has a focal length f. G3 -20 < f G1 / f G3 <-2,

[0123] Where R1 is the radius of curvature of the cemented surface of the first lens group. The effective pore size of the glued surface.

[0124] Where R2 is the radius of curvature of the cemented surface of the second lens group. The effective pore size of the glued surface.

[0125] Where R3 is the radius of curvature of the cemented surface of the doublet lens group in the third lens group. This refers to the effective pore size of the adhesive surface.

[0126] Table 2 provides examples of specific optical structure parameters:

[0127] 1 -166 2 1.516 64.2125 2 68 1.5 1.6486 55.4857 3 -258.8 30 4 100 4 1.6274 53.9285 5 -60 2 1.6131 60.5244 6 -170 15 7 Infinity 17 1.5168 64.167 8 Infinity 13 9 Infinity 2 1.4338 94.996 10 -74.05 1.5 1.8467 23.78 11 -85 14 12 Infinity ---- 13 Infinity 24 14 -88 2 1.6274 53.9285 15 69 3 1.6131 60.5244 16 -110 25 17 Infinity 17 1.5168 64.167 18 Infinity ---

[0128] The first mirror 213 in the mirror assembly 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.

[0129] The image steering mirror group 215 is located on the second axis b and can rotate with the second axis b as the axis of rotation. The image steering mirror group 215 and the second lens group 211 are arranged sequentially on the second axis b along the light direction.

[0130] like Figure 16 As shown in Tables 1 and 2:

[0131] The radius r is the radius of curvature of the lens surface.

[0132] Thickness d is the center thickness of the lens.

[0133] Nd is the refractive index of d-light (wavelength 589.3 nm) in optical glass.

[0134] Vd Explanation: Because the same transparent medium has different refractive indices for different wavelengths of light, and white light is composed of different wavelengths of light of various colors, a special phenomenon occurs when transparent materials refract white light. The Abbe number is an index used to represent the dispersion ability of a transparent medium. The reference base generally used is the middle dispersion, which is the difference between the refractive indices of cyan and red light.

[0135] Abbe number Vd=(nd-1) / (nF-nC),

[0136] nd, nF, and nC are the refractive indices of D-ray, F-ray, and C-ray, respectively.

[0137] D-ray—yellow light, 589.3 nm, the D line in the sodium spectrum.

[0138] F-ray—blue light, 486.1 nm, the F-line in the hydrogen spectrum.

[0139] C-light—red light, 656.3 nm, the C line in the hydrogen spectrum.

[0140] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An optical adapter for connecting a surgical microscope and a digital camera, comprising a main housing and an optical lens assembly disposed inside the main housing, wherein one end of the main housing forms a first connection end for connecting to a beam splitter of the surgical microscope, and the other end of the main housing forms a second connection end for connecting to the digital camera, characterized in that: The main outer shell includes a first outer shell segment, a second outer shell segment, and a third outer shell segment. One end of the first housing segment forms the first connecting end, and the first housing segment extends at least partially in the first axial direction; One end of the second housing segment is connected to the other end of the first housing segment, and the second housing segment extends at least in the second axial direction; One end of the third housing segment is connected to the other end of the second housing segment, the other end of the third housing segment forming the second connecting end, and the third housing segment extends at least in the third axial direction. The first axis and the third axis intersect the second axis respectively, and the first axis and the third axis are both perpendicular to the second axis. The first outer shell segment and the second outer shell segment can rotate relative to each other with the first axis as the rotation axis, and the second outer shell segment and the third outer shell segment can rotate relative to each other with the second axis as the rotation axis.

2. The optical adapter according to claim 1, characterized in that: In at least one state, the first and third shell segments are located on the same side of the second shell segment and are C-shaped.

3. The optical adapter according to claim 1, characterized in that: The optical lens assembly includes: The lens group is located on at least one of the first axis, the second axis, and the third axis; A reflector assembly, comprising a first reflector and a second reflector, wherein the first reflector is located at the intersection of the first axis and the second axis, and the second reflector is located at the intersection of the second axis and the third axis.

4. The optical adapter according to claim 3, characterized in that: 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.

5. The optical adapter according to claim 4, characterized in that: The first lens group is a cemented doublet lens group with positive optical power, and the focal length of the first lens group is... f G1 Satisfy: 150mm < f G1 <300mm, The second lens group is a cemented doublet with positive optical power, and the focal length of the second lens group is... f G2 Satisfying 0.5 < f G2 / f G1 <2, The third lens group includes a cemented doublet with positive optical power and a single lens, wherein the focal length of the third lens group is... f G3 Satisfying 10 < f G1 / f G3 <30.

6. The optical adapter according to claim 4, characterized in that: The first lens group is a cemented doublet with positive optical power, and <20, of which R 1 Let be the radius of curvature of the cemented surface of the first lens group. The effective pore size of the adhesive surface; The second lens group is a cemented doublet with positive optical power, and <15, of which R 2 Let be the radius of curvature of the cemented surface of the first lens group. The effective pore size of the adhesive surface; The third lens group includes a cemented doublet with positive optical power and a single lens, and <10, of which R 3 Let be the radius of curvature of the cemented surface of the cemented doublet lens group in the third lens group. This refers to the effective pore size of the adhesive surface.

7. The optical adapter according to claim 4, characterized in that: The first lens group is disposed within the first housing segment; the first reflector and the second lens group are disposed within the second housing segment; the second reflector and the third lens group are disposed within the third housing segment.

8. The optical adapter according to claim 1, characterized in that: The optical lens group includes an image steering lens group, which is used to adjust the direction of the optical image image projected on the photosensitive unit of the digital camera device. The image steering lens group is located on the second axis and can rotate with the second axis as the pivot.

9. The optical adapter according to claim 8, characterized in that: The second outer shell section is provided with a rotating part for rotating the image rotating mirror assembly, and the image rotating mirror assembly is connected to the rotating part.

10. The optical adapter according to claim 1, characterized in that: The main body shell is composed of the first shell segment, the second shell segment, and the third shell segment.

11. A surgical microscope, comprising a microscope body and an optical adapter, wherein the microscope body includes a microscope shaft, a beam splitter, and an eyepiece, the beam splitter being connected to the microscope shaft, and the eyepiece and the optical adapter being respectively connected to the beam splitter, characterized in that: The optical adapter is the optical adapter as described in any one of claims 1 to 10.

12. The surgical microscope according to claim 11, characterized in that: The surgical microscope also includes a digital camera, which is selected from mobile phones, cameras, and tablet computers.

13. The surgical microscope according to claim 11, characterized in that: In at least one state, the surgical microscope has the eyepiece and the digital camera facing the same side of the microscope body.

14. The surgical microscope according to claim 11, characterized in that: The optical adapter is detachably connected to the beam splitter.

15. The surgical microscope according to claim 11, characterized in that: The beam splitter includes a beam splitter housing and a beam splitter lens assembly disposed inside the beam splitter housing. The beam splitter housing has a body connection end, an eyepiece connection end, and an adapter connection end. The eyepiece connection end faces the front side of the microscope body, and the adapter connection end faces the rear side of the microscope body. The microscope body is connected to the body connection end, the eyepiece is connected to the eyepiece connection end, and the optical adapter is connected to the adapter connection end.

16. The surgical microscope according to claim 15, characterized in that: The aforementioned beam splitter assembly includes a combination of a pentaprism and a Schmidt prism, or a combination of a cubic prism and a pentaprism.

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