Non-contact fundus imaging wide-angle lens adapter of operating microscope

Abstract

The invention discloses a non-contact fundus imaging wide-angle lens adapter for an operating microscope, and the adapter comprises a connection assembly which is used for detachably installing the adapter on the operating microscope; a moving assembly; a focal length adjusting assembly; a wide-angle lens mounting assembly; the moving assembly is arranged on the connecting assembly, the moving assembly is connected with the focal length adjusting assembly, the focal length adjusting assembly is connected with the wide-angle lens mounting assembly, and the wide-angle lens can synchronously rotate and / or perform height adjustment along with the focal length adjusting assembly and can also synchronously move along with the moving assembly. The adapter is high in adaptability and can be compatible with operation microscopes of almost all brands and models; the non-contact fundus imaging function can be achieved by adding the adapter for an old microscope and a common operating microscope, so that fundus vitrectomy can be performed, a brand-new microscope does not need to be purchased, and a large amount of cost can be saved for hospitals; the focusing and dynamic visual field adjusting functions are achieved, and a doctor can more smoothly adjust the imaging focal length in the operation process.

Description

Technical Field

[0001] The present invention belongs to the technical field of microscopes, and particularly relates to a non-contact fundus imaging wide-angle lens adapter for a surgical microscope. Background Art

[0002] In the field of ophthalmic surgery, fundus imaging is an important auxiliary technology for surgical microscopes. Doctors need clear images of the retina, vitreous body, and macula to precisely complete complex operations such as vitrectomy and retinal detachment repair. The earliest fundus imaging methods mainly used contact fundus imaging systems, that is, directly placing a fundoscope on the surface of the patient's eyeball to obtain a stable high-resolution field of view. Although the contact fundus imaging system provided relatively good imaging quality at that time, with the development of technology, its limitations gradually emerged. The following are the main defects and deficiencies of the contact fundus imaging system:

[0003] 1) Cause physical damage to the eyeball:

[0004] 11) Corneal damage caused by mechanical compression: Since the fundoscope needs to directly contact the cornea or sclera, a certain pressure will be exerted on the eyeball during the operation. For patients with high intraocular pressure (such as glaucoma patients), this pressure may increase the intraocular pressure and the risk of postoperative complications; at the same time, continuous contact may cause corneal epithelial edema or damage, prolong the postoperative recovery time, and may trigger postoperative corneal inflammation;

[0005] 12) Require a surgical incision, increasing the risk of trauma: Traditional contact fundus imaging requires making a small hole at the limbus corneae (usually for vitrectomy) and placing a corneal trephine to stabilize the fundoscope. This process will cause additional trauma to the eyeball tissue, which may lead to: slow postoperative wound healing, increasing the risk of infection; the risk of intraoperative bleeding, especially for patients with hypertension, diabetes, etc.;

[0006] 13) Increase the discomfort of patients during the operation: Since the fundoscope directly contacts the eyeball, patients may experience transient foreign body sensation, corneal irritation symptoms, and even short-term vision loss after the operation. Moreover, if the patient's eyeball moves during the operation, it may cause additional discomfort or affect the surgical precision.

[0007] 2) The surgical operation is complex, the surgical difficulty is high, and the requirements for doctors' operations are high:

[0008] 21) Since the fundoscope needs to be stably placed on the eyeball, the doctor must carefully adjust the angle during the operation to avoid the fundoscope sliding or shifting, otherwise it may lead to image distortion and affect the surgical precision;

[0009] And an additional assistant is required during the operation to fix the fundoscope, increasing the burden on the surgical team;

[0010] 22) Since the ophthalmoscope directly covers the surface of the eyeball, some models may affect the doctor's surgical operation perspective, resulting in limited operable space for certain complex surgeries (such as retinal reattachment surgery and vitrectomy);

[0011] The fixation method of the traditional contact system requires additional time for the doctor to adjust the microscope focal length or field of view, affecting the surgical efficiency.

[0012] 3) Intraoperative imaging is limited, affecting the image quality:

[0013] 31) The field of view is limited. The field of view of contact fundus imaging is usually between 30° - 90°, and the observable range is small. Doctors need to frequently adjust the angle to view the complete fundus structure, increasing the surgical difficulty;

[0014] The limited field of view may make it difficult for doctors to observe the peripheral parts of the fundus during the operation, especially the lesions in the peripheral retina (such as peripheral holes);

[0015] 32) Prone to be affected by the intraoperative eye state. If corneal edema or vitreous turbidity occurs during the operation, it will affect the light penetration, thus reducing the image clarity; if the eye is under pressure changes during the operation (such as the internal pressure change during vitrectomy), it may cause fluctuations in the imaging quality, affecting the doctor's judgment;

[0016] 33) Optical reflection and astigmatism interference: Since the ophthalmoscope is in direct contact with the cornea, light reflection is likely to occur on the corneal surface when the light source irradiates, resulting in local overexposure or blurred imaging in the field of view. Corneal astigmatism may affect the contrast of the image, interfering with the doctor's observation of subtle lesions (such as macular lesions).

[0017] 4) Long postoperative recovery time and increased infection risk:

[0018] 41) Corneal injury leads to delayed recovery: The cornea is under pressure during the operation and may take several days to several weeks to recover. Some patients may experience transient corneal edema or vision decline;

[0019] For patients with corneal diseases (such as corneal degeneration and corneal ulcer), contact fundus imaging may exacerbate the lesions and prolong the postoperative recovery time;

[0020] 42) Higher postoperative infection risk: Since the contact ophthalmoscope directly contacts the eyeball during the operation, any bacterial contamination may increase the postoperative infection risk, especially in long surgeries (such as vitrectomy), where the infection probability is higher;

[0021] Postoperative corneal edema or small wounds may become the invasion route of bacteria, increasing the risk of postoperative inflammation (such as postoperative endophthalmitis).

[0022] To solve the above problems, the resight non-contact wide-angle lens of Carl Zeiss in Germany came into being, but there are still many limitations:

[0023] (1) It is only applicable to Zeiss' own high-end surgical microscopes, with poor compatibility and cannot be compatible with other brands or mid- to low-end models of surgical microscopes. It is necessary to purchase an additional Zeiss brand microscope system, and the cost of a single system is as high as tens of thousands of dollars. Many grass-roots hospitals, mobile medical units, and medical institutions in developing countries cannot afford the expensive equipment procurement costs, which limits the popularization of vitrectomy for fundus diseases;

[0024] Due to the high price, many hospitals cannot perform vitrectomy for fundus diseases even if they have surgical microscopes, resulting in patients having to be referred to higher-level medical institutions, delaying treatment;

[0025] (2) Many existing surgical microscopes in hospitals can still be used normally, but due to the lack of fundus imaging ability, they cannot perform vitrectomy;

[0026] In order to use the resight non-contact wide-angle lens, hospitals must purchase a new Zeiss high-end microscope system, resulting in duplicate investment in equipment and increasing medical costs. Summary of the Invention

[0027] To solve the technical problems existing in the prior art, the purpose of the present invention is to provide a non-contact fundus imaging wide-angle lens adapter for a surgical microscope.

[0028] To achieve the above purpose and reach the above technical effects, the technical solution adopted by the present invention is as follows:

[0029] A non-contact fundus imaging wide-angle lens adapter for a surgical microscope, comprising:

[0030] A connection component for detachably mounting the adapter to the surgical microscope;

[0031] A moving component;

[0032] A focal length adjustment component;

[0033] A wide-angle lens mounting component for mounting wide-angle lenses of different models;

[0034] The moving component is arranged on the connection component, the moving component is detachably connected to the focal length adjustment component, the focal length adjustment component is detachably connected to the wide-angle lens mounting component, and the wide-angle lens can rotate synchronously with the focal length adjustment component and / or perform height adjustment, and can also move synchronously with the moving component to adjust the horizontal position.

[0035] Furthermore, the moving component is arranged below the connecting component, and the moving component can drive the focal length adjusting component and the wide-angle lens to slide in or out below the connecting component.

[0036] Furthermore, the connecting component includes a connecting plate, and a plurality of holes and connecting holes are formed in the connecting plate for detachably mounting the adapter to the operating microscope. A track and a slider are arranged below the connecting plate. The moving component is connected to the slider. The slider is mounted on the track and can reciprocate along the track to drive the moving component to move synchronously.

[0037] Furthermore, magnetic blocks are respectively arranged at the head and tail ends of the track, and the magnetism of the slider is opposite to that of the magnetic blocks.

[0038] Furthermore, a groove is formed in the slider, and positioning holes are respectively arranged on opposite sides of the groove. The moving component includes a sliding plate. An installation groove for accommodating the lens is formed on one side of the sliding plate. A convex block adapted to the groove is arranged on the other side of the sliding plate. Positioning grooves adapted to the positioning holes are respectively arranged on opposite sides of the convex block. By inserting the convex block into the groove and simultaneously inserting a connecting piece through the positioning groove into the positioning hole, the sliding plate can be connected to the slider. When the slider moves along the track, it can drive the sliding plate and the focal length adjusting component and the wide-angle lens thereon to move synchronously.

[0039] Furthermore, the focal length adjusting component includes a support, an adjusting seat, a focal length adjusting rod and an adjusting knob. The focal length adjusting rod vertically passes through the support and is fixed to the adjusting seat. By rotating the adjusting knob, the focal length adjusting rod can be controlled to reciprocate vertically under the guiding action of the support, synchronously driving the adjusting seat and the wide-angle lens to reciprocate vertically, so as to adjust the height of the wide-angle lens and thus adjust the fundus imaging focal length.

[0040] Furthermore, the focal length adjusting rod includes a driving rod and a driven rod arranged in parallel. A plurality of teeth are arranged on the driving rod. The driving rod and the driven rod are connected together through an intermediate plate. The driving rod and the driven rod vertically pass through the support and are fixed to the adjusting seat.

[0041] Furthermore, the support includes a first mounting support and a second mounting support. The lower ends of the first mounting support and the second mounting support are detachably connected together. The upper end of the second mounting support is detachably connected to the moving component.

[0042] Furthermore, a gear rod passes through the first mounting support. Adjusting knobs are respectively mounted at opposite ends of the gear rod. The teeth on the gear rod are meshed with the teeth on the driving rod. By rotating the adjusting knob to drive the gear rod to rotate synchronously, the driving rod is driven to reciprocate vertically under the guiding action of the support, thereby driving the adjusting seat and the wide-angle lens to reciprocate vertically.

[0043] Furthermore, the upper end of the second mounting seat is connected to the slide plate of the moving assembly through an intermediate connecting seat and a rotating seat. A third through hole is provided on the side surface of the intermediate connecting seat, and a fixing groove is arranged on the top surface of the intermediate connecting seat. A convex column adapted to the fixing groove is provided below the slide plate. The surfaces of the fixing groove in contact with the convex column and the convex column are both magnetically treated and have opposite magnetic properties. The connection between the moving assembly and the focal length adjustment assembly is realized by inserting the convex column into the fixing groove. A second fixing groove is provided on the rotating seat, and the connection is realized by passing the rotating seat through the third through hole and embedding the upper end of the second mounting seat into the second fixing groove. The second mounting seat and the rotating seat can rotate left and right, thereby driving the wide-angle lens to rotate synchronously.

[0044] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0045] (1) It has strong adaptability and can be compatible with almost all brands and models of operating microscopes, such as Zeiss, Leica, Moller-Wedel, Topcon, etc., greatly expanding the scope of equipment application and having a greater market demand; it is applicable to old model microscopes, enabling them to perform vitrectomy surgeries on the fundus of the eye, avoiding the situation where hospitals are unable to carry out relevant surgeries due to equipment incompatibility.

[0046] (2) It can transform old equipment. By simply replacing or adding an adapter, old or ordinary microscopes can be equipped with non-contact fundus imaging capabilities, thereby being able to perform vitrectomy surgeries on the fundus of the eye without the need to purchase a brand-new microscope, saving a large amount of equipment update costs for hospitals, reducing long-term investment costs, and being suitable for procurement by hospitals at different levels; all lenses in the present invention adopt high-transmission optical lenses, which can achieve high-definition fundus imaging, approaching the imaging quality of the Resight mirror, but the price is much lower than that of the Zeiss Resight mirror, being more cost-effective and easier to promote and popularize.

[0047] (3) All lenses in the present invention adopt high-resolution aspherical lenses, which can provide a larger field of view angle, up to 120° - 130°, wider than traditional contact imaging systems and approaching the field of view of high-end systems; combined with anti-reflection coating technology, a transparent dielectric film is coated on the lens. The refractive index of these films is different from that of glass, and through interference, the reflected light in a specific wavelength range can be effectively reduced, thereby improving the light transmittance, reducing reflection loss, enabling the lens to pass more light, enhancing imaging clarity, reducing ghost images and glare, improving image contrast, enhancing visual comfort, making the image more natural and sharp for the viewer, improving the imaging performance in night or backlight environments, reducing the glare and scattering of the surgical light source, increasing the image contrast, making the retinal structure clearer, and helping the surgeon to operate precisely in the microscopic field of view.

[0048] (4) It has autofocus and image stabilization technologies, and can still maintain clear imaging when the eyeball moves, improving the surgical accuracy.

[0049] (5) The adapter is easy to install, without complex debugging, and has a stepless focusing function, which can improve the surgical efficiency of doctors.

[0050] (6) It supports remote image recording and video transmission, can expand the remote medical function, can be used for surgical live broadcast, teaching demonstration or remote medical guidance, and is suitable for the development trend of modern digital medicine.

[0051] (7) It is applicable to medical institutions at all levels:

[0052] High-end hospitals: Provide a low-cost upgrade solution for hospitals with existing surgical microscopes to avoid duplicate equipment investment;

[0053] Primary hospitals and clinics: Help hospitals with limited funds to carry out vitrectomy for fundus diseases and improve the medical service capacity;

[0054] Mobile medical units: Applicable to scenarios such as mobile medical vehicles, field hospitals, and disaster relief medical treatment, enabling the medical team to complete ophthalmic surgeries in non-standard operating room environments;

[0055] Developing countries and regions with scarce medical resources: Provide a more economical surgical microscope upgrade solution to improve the accessibility of fundus disease surgeries. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0057] Figure 2 It is a schematic diagram of the three-dimensional structure of the connection component of the present invention;

[0058] Figure 3 It is a schematic diagram of the three-dimensional structure of the moving component of the present invention;

[0059] Figure 4 It is an installation schematic diagram of the connection component and the moving component of the present invention;

[0060] Figure 5 It is an exploded view of the focal length adjustment component of the present invention;

[0061] Figure 6 It is a schematic diagram of the structure of the focal length adjustment component of the present invention when the first mounting seat is not installed. DETAILED DESCRIPTION OF THE INVENTION

[0062] The present invention will be described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0063] A brief overview of one or more aspects is given below to provide a basic understanding of these aspects. This overview is not an exhaustive survey of all contemplated aspects and is neither intended to identify key or decisive elements of all aspects nor to delimit the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to a more detailed description given later.

[0064] As Figure 1-6 shown, a non-contact fundus imaging wide-angle lens adapter for a surgical microscope includes:

[0065] A connection component for detachably mounting the adapter to the surgical microscope;

[0066] A moving component;

[0067] A focal length adjustment component;

[0068] A wide-angle lens mounting component for mounting different models of wide-angle lens 1;

[0069] Wherein, the moving component is arranged below the connection component, the moving component is detachably connected to the focal length adjustment component, the focal length adjustment component is detachably connected to the wide-angle lens mounting component, the wide-angle lens 1 can rotate synchronously with the focal length adjustment component and / or perform height adjustment, and the focal length adjustment component and the wide-angle lens 1 can be driven by the moving component to slide in or out below the connection component to adjust the horizontal position.

[0070] In some embodiments, the connection component includes a connection plate 2 and a plurality of hole slots 3 and connection holes 4 provided thereon, which can be adapted to almost all brands and models of microscopes on the market, such as Zeiss, Leica, Olympus, Möller-Wedel, Topcon, and domestic surgical microscopes, etc., greatly expanding the scope of application of the device. It should also be noted that for different brands and models of surgical microscopes, the sizes, positions, etc. of the reserved hole slots 3 and connection holes 4 are not necessarily the same, and screws, bolts, etc. suitable for the adapter and the surgical microscope need to be selected according to different brands and models to ensure a perfect fit between the adapter and the surgical microscope.

[0071] In some embodiments, the moving component includes a sliding plate 5. An installation groove 6 for accommodating a lens is formed on one side of the sliding plate 5. A raised block 7 of a certain length is provided at the middle position on the other side of the sliding plate 5. Positioning grooves 8 are respectively provided on the two opposite sides of the raised block 7. Side holes 81 adapted to the positioning grooves 8 are respectively provided on the side surface of the sliding plate 5, and the side holes 81 communicate with the positioning grooves 8. A track 9 and a slider 10 are provided below the connecting plate 2. The slider 10 is installed on the track 9 and can reciprocate along the track 9. A groove 11 adapted to the raised block 7 is formed at the middle position of the slider 10, and the length of the groove 11 can penetrate through the slider 10. The sizes of the raised block 7 and the groove 11 can be flexibly designed according to actual requirements. Positioning holes 12 adapted to the positioning grooves 8 are respectively provided on the two opposite sides of the groove 11. The raised block 7 is inserted into the groove 11, and at the same time, a connecting member 13 (such as a screw or a bolt) passes through the positioning groove 8 and is inserted into the positioning hole 12, so that the sliding plate 5 can be connected to the slider 10. When the slider 10 moves along the track 9, it can drive the sliding plate 5 to move synchronously. When the doctor needs to use it, the sliding plate 5 can be slid by hand to the directly below the large objective lens of the surgical microscope for surgery. At this time, the lens installed in the installation groove 6 is coaxial with the large objective lens of the surgical microscope. When not in use, the sliding plate 5 can be slid back to the starting position by hand to standby, without affecting the surgery.

[0072] In some embodiments, the lens installed in the installation groove 6 can be f175mm or f200mm according to the size of the large objective lens of the surgical microscope for correct adaptation, and is compatible with the f175mm microscope objective lens and the f200mm objective lens existing in the market.

[0073] In some embodiments, the head and tail ends of the track 9 are respectively subjected to weak magnetic treatment, and the slider 10 can be magnetically attracted to the head and tail ends of the track 9 to ensure that the slider 10 does not swing elsewhere in the middle of the track 9.

[0074] In some specific embodiments, magnetic blocks are respectively provided at the head and tail ends of the track 9, and the magnetism of the slider 10 is opposite to that of the magnetic blocks.

[0075] In some embodiments, in order to realize the connection between the moving component and the focal length adjusting component, a raised column 14 is provided below the sliding plate 5.

[0076] In some embodiments, the focal length adjusting component and the moving component are magnetically adsorbed together, which is very convenient to use. The focal length adjusting component and the moving component can be adsorbed when they are close to each other, and can be disconnected by applying force by hand, eliminating the trouble of installation.

[0077] In some embodiments, the focal length adjustment assembly includes a support 15, an adjustment seat 16, a focal length adjustment rod 17, and an adjustment knob 18. Among them, the focal length adjustment rod 17 includes a driving rod 171 and a driven rod 172 arranged in parallel. A plurality of teeth 173 are provided on the driving rod 171. The driving rod 171 and the driven rod 172 are connected together by an intermediate plate 174. Hole structures for vertically penetrating the driving rod 171 and the driven rod 172 are respectively provided on the intermediate plate 174. The driving rod 171 and the driven rod 172 vertically pass through the support 15 and are fixed to the adjustment seat 16. By rotating the adjustment knob 18, it is possible to control the vertical reciprocating movement of the focal length adjustment rod 17 under the guiding action of the support 15, synchronously driving the adjustment seat 16 and the wide-angle lens 1 to vertically reciprocate, so as to achieve the purpose of adjusting the height of the wide-angle lens 1, thereby adjusting the focal length of fundus imaging and achieving a clear and sharp imaging effect, enabling the ophthalmologist to see every detail clearly during the operation without pressure.

[0078] In some specific embodiments, the support 15 includes a first mounting support 151 and a second mounting support 152. Among them, the lower ends of the first mounting support 151 and the second mounting support 152 are connected together by conventional mechanical means such as screws and bolts. The upper end of the second mounting support 152 is connected to the slide plate 5 through an intermediate connecting seat 19 and a rotating seat 20. First through holes 153 for vertically penetrating the driving rod 171 and the driven rod 172 are respectively provided on the top surface of the first mounting support 151. There are two first through holes 153 in total. A second through hole 154 for inserting a gear rod 21 is provided on the side surface of the first mounting support 151. A first fixing groove 155 is provided on one side of the first mounting support 151 facing the second mounting support 152. The lower end of the second mounting support 152 is embedded in the first fixing groove 155 and connected together by conventional mechanical means such as screws and bolts. The opposite ends of the gear rod 21 are respectively installed with the adjustment knob 18 through gaskets 181. The teeth on the gear rod 21 are meshed with the teeth 173 on the driving rod 171. By rotating the adjustment knob 18, the gear rod 21 can be driven to rotate synchronously, thereby driving the driving rod 171 to vertically reciprocate under the guiding action of the support 15.

[0079] More specifically, a third through hole 191 is formed in the side surface of the middle connection seat 19, and a fixing groove 192 is provided on the top surface of the middle connection seat 19. The surfaces of the fixing groove 192 in contact with the convex column 14 and the convex column 14 are both magnetically treated and have opposite magnetic polarities. The convex column 14 is inserted into the fixing groove 192, and the connection between the moving component and the focal length adjustment component can be realized through both magnetic adsorption and mechanical connection, making the connection between the moving component and the focal length adjustment component more reliable. One end of the rotating seat 20 is provided with a second fixing groove 201, and the other end of the rotating seat 20 is provided with a flange 202. The outer diameter of the flange 202 is larger than the inner diameter of the third through hole 191. When the rotating seat 20 passes through the third through hole 191, the flange 202 is blocked on the side of the middle connection seat 19 away from the support seat 15. The upper end of the second mounting support seat 152 is embedded in the second fixing groove 201 and connected together by conventional mechanical means such as screws and bolts. The second mounting support seat 152 can rotate left and right, thereby driving the first mounting support seat 151 and the like connected thereto to rotate synchronously.

[0080] In some embodiments, the wide-angle lens mounting assembly includes wide-angle lens legs 22 and a mounting groove seat 23 for mounting the wide-angle lens 1. The wide-angle lens legs 22 are vertically mounted in the vertical through holes 161 on the adjusting seat 16.

[0081] In some embodiments, all the lenses in the present invention, including the wide-angle lens 1 and the lenses installed in the mounting groove 6, are preferably high-transmission and high-resolution optical aspherical lenses to achieve high-definition fundus imaging and provide a larger field of view angle, reaching 120° - 130°.

[0082] In some embodiments, based on the anti-reflection coating technology, the present invention preferably coats one or more layers of transparent dielectric films on the lens. The refractive index of the film is different from that of the glass, and the reflected light in a specific wavelength range can be effectively reduced through interference, thereby achieving the following effects: improving the light transmittance, reducing the reflection loss, enabling the lens to transmit more light; enhancing the imaging clarity, reducing ghost images and glare, and improving the image contrast; enhancing the visual comfort, making the image more natural and sharp for the viewer; improving the imaging performance in night or backlight environments; reducing the glare and scattering of the surgical light source, improving the image contrast, making the retinal structure clearer, and helping the surgeon to operate precisely in the microscopic field of view.

[0083] Embodiment 1

[0084] As Figure 1-6 shown, a non-contact fundus imaging wide-angle lens adapter for a surgical microscope includes:

[0085] a connection component for detachably mounting the adapter to the surgical microscope;

[0086] a moving component;

[0087] Focus adjustment component;

[0088] Wide-angle lens mounting component for mounting wide-angle lenses 1 of different models;

[0089] Among them, the moving component is arranged below the connecting component. The moving component is detachably connected to the focus adjustment component, and the focus adjustment component is detachably connected to the wide-angle lens mounting component. The wide-angle lens 1 can rotate synchronously with the focus adjustment component and / or perform height adjustment. The moving component can drive the focus adjustment component and the wide-angle lens 1 to slide in or out below the connecting component to adjust the horizontal position.

[0090] In this embodiment, the connecting component includes a connecting plate 2 and two slot holes 3 and a plurality of connecting holes 4 provided thereon. The designs of the above slot holes 3 and connecting holes 4 are reserved by the applicant when matching different microscopes on the market, so that it can be adapted to almost all brands and models of microscopes on the market, such as Zeiss, Leica, Olympus, Möller-Wedel, Topcon, and domestic surgical microscopes, etc., greatly expanding the applicable range of the equipment. It should also be noted that for different brands and models of surgical microscopes, the sizes, positions, etc. of the reserved slot holes 3 and connecting holes 4 are not necessarily the same, and screws suitable for different brands and models of surgical microscopes need to be selected to ensure that the adapter fits tightly with the surgical microscope. In practical applications, the applicant can provide screws adapted to different brands and models of microscopes.

[0091] The moving component includes a sliding plate 5. On one side of the sliding plate 5, there is a mounting groove 6 for accommodating a lens. In the middle position on the other side of the sliding plate 5, there is a protruding block 7 with a certain length. On the two opposite sides of the protruding block 7, positioning grooves 8 are symmetrically arranged. On the side surface of the sliding plate 5, side holes 81 adapted to the positioning grooves 8 are symmetrically arranged, and the side holes 81 communicate with the positioning grooves 8. Below the connecting plate 2, there are a track 9 and a slider 10. The slider 10 is installed on the track 9 and can reciprocate along the track 9. In the middle position of the slider 10, there is a groove 11 adapted to the protruding block 7, and the length of the groove 11 runs through the slider 10. On the two opposite sides of the groove 11, positioning holes 12 adapted to the positioning grooves 8 are symmetrically arranged. By inserting the protruding block 7 into the groove 11 and at the same time inserting a connecting member 13 (screw) through the positioning groove 8 into the positioning hole 12, the sliding plate 5 and the slider 10 can be connected together. Below the sliding plate 5, there is a protruding column 14 with magnetism. When the slider 10 moves along the track 9, it can drive the sliding plate 5 to move synchronously. The applicant designs that when the slider 10 slides to the front end, the lens installed in the mounting groove 6 exactly coincides with the concentric circle of the large objective lens of the surgical microscope. When the doctor needs to use it, first directly insert the adapter of this embodiment into the hole groove 3 and the connecting hole 4 by using the supporting screws to complete the installation of the adapter and the target microscope such as Zeiss, Leica, etc. After installation, when the slider 10 slides to the front end of the track 9, the lens on the adapter exactly coincides with the large objective lens of the target microscope, and then the operation can be carried out. When not in use, the sliding plate 5 can be slid back to the starting position for standby by hand pushing, which will not affect the operation.

[0092] The lens installed in the mounting groove 6 can be selected as f175mm or f200mm according to the size of the large objective lens of the surgical microscope for correct adaptation, and is compatible with the f175mm microscope objective lens and the f200mm objective lens existing in the market.

[0093] Both the head and the tail ends of the track 9 are subjected to weak magnetic treatment. Magnetic blocks are respectively arranged at the head and the tail ends of the track 9. The magnetism of the slider 10 is opposite to that of the magnetic blocks. When the slider 10 slides to the front end (head end) of the track 9, magnetic attraction occurs between them. When the slider 10 slides to the last end (tail end) of the track 9, magnetic attraction occurs between them, ensuring that the slider 10 does not swing at other places in the middle of the track 9.

[0094] The focal length adjustment assembly includes a support 15, an adjustment seat 16, a focal length adjustment rod 17, and an adjustment knob 18. Among them, the focal length adjustment rod 17 includes a driving rod 171 and a driven rod 172 arranged in parallel. A plurality of teeth 173 are provided on the driving rod 171. The driving rod 171 and the driven rod 172 are connected together by an intermediate plate 174. Hole structures for vertically penetrating the driving rod 171 and the driven rod 172 are respectively formed on the intermediate plate 174. The driving rod 171 and the driven rod 172 vertically penetrate the support 15 and are fixed to the adjustment seat 16. By rotating the adjustment knob 18, the focal length adjustment rod 17 can be controlled to move vertically back and forth under the guiding action of the support 15, synchronously driving the adjustment seat 16 and the wide-angle lens 1 to move vertically back and forth, so as to achieve the purpose of adjusting the height of the wide-angle lens 1, thereby adjusting the fundus imaging focal length and achieving a clear and sharp imaging effect, enabling the ophthalmologist to see every detail clearly during the operation without any pressure.

[0095] Specifically, the support 15 includes a first mounting support 151 and a second mounting support 152. Among them, the lower ends of the first mounting support 151 and the second mounting support 152 are connected together by screws. The upper end of the second mounting support 152 is connected to the slide plate 5 through an intermediate connecting seat 19 and a rotating seat 20. First through holes 153 for vertically penetrating the driving rod 171 and the driven rod 172 are respectively formed on the top surface of the first mounting support 151. There are two first through holes 153 in total. A second through hole 154 for inserting a gear rod 21 is formed on the side surface of the first mounting support 151. A first fixing groove 155 is formed on one surface of the first mounting support 151 facing the second mounting support 152. The lower end of the second mounting support 152 is embedded in the first fixing groove 155 and connected together by screws. The opposite ends of the gear rod 21 are respectively installed with the adjustment knob 18 through washers 181. The teeth on the gear rod 21 are meshed with the teeth 173 on the driving rod 171. By rotating the adjustment knob 18, the gear rod 21 can be driven to rotate synchronously, thereby driving the driving rod 171 to move vertically back and forth under the guiding action of the support 15.

[0096] A third through hole 191 is formed on the side surface of the intermediate connecting seat 19. A fixing groove 192 is provided on the top surface of the intermediate connecting seat 19. The surfaces of the fixing groove 192 in contact with the protruding column 14 and the protruding column 14 are both magnetically treated and their magnetisms are opposite. The protruding column 14 is inserted into the fixing groove 192. The connection between the moving assembly and the focal length adjustment assembly can be realized through magnetic adsorption and mechanical connection at the same time, making the connection between the moving assembly and the focal length adjustment assembly more reliable and very convenient to use. The focal length adjustment assembly and the moving assembly can be adsorbed when they are close to each other and can be disconnected by hand, eliminating the trouble of installation.

[0097] One end of the rotating base 20 is provided with a second fixing groove 201, and the other end of the rotating base 20 is provided with a flange 202. The outer diameter of the flange 202 is greater than the inner diameter of the third through hole 191. When the rotating base 20 passes through the third through hole 191, the flange 202 is blocked on the side of the intermediate connecting seat 19 away from the support 15. The upper end of the second mounting support 152 is embedded in the second fixing groove 201 and connected together by conventional mechanical means such as screws and bolts. The second mounting support 152 can rotate left and right, thereby driving the first mounting support 151 and the like connected thereto to rotate synchronously, so as to fold up the adapter, save space and not affect other ophthalmic surgeries.

[0098] The wide-angle lens mounting assembly includes wide-angle lens legs 22 and a mounting groove seat 23 for mounting the wide-angle lens 1. The wide-angle lens legs 22 are vertically mounted in the vertical through hole 161 on the adjusting seat 16. When mounting the wide-angle lens 1, directly hold the wide-angle lens legs 22 and insert them into the vertical through hole 161, without touching the wide-angle lens 1 and without contaminating the wide-angle lens 1.

[0099] Since the focal length of the ophthalmic surgical microscope is generally between 175 mm and 200 mm, a focal length base number 170 is set in this embodiment. By rotating the adjustment knob 18, a mechanically adjustable space of plus or minus 30 mm can be achieved, ensuring that ophthalmic surgeries with a focal length of 175 mm to 200 mm can be performed.

[0100] All the lenses in this embodiment, including the wide-angle lens 1 and the lenses installed in the mounting groove 6, adopt high-transmission and high-resolution optical aspherical lenses, which can achieve high-definition fundus imaging, approaching the imaging quality of the resight lens. However, the price is much lower than that of the Zeiss resight lens, with higher cost performance, easier to promote and popularize. It can also provide a larger field of view angle, up to 120° - 130°, wider than the traditional contact imaging system, approaching the field of view range of high-end systems. At the same time, based on the anti-reflection coating technology, a transparent dielectric film is coated on the lenses in this embodiment. Its refractive index is different from that of glass. Through the interference effect, the reflected light in a specific wavelength range is effectively reduced, thereby improving the light transmittance, reducing the reflection loss, enabling the lenses to transmit more light, enhancing the imaging clarity, reducing ghost images and glare, improving the image contrast, enhancing the visual comfort, making the image more natural and sharp for the viewer, improving the imaging performance in night or backlight environments, reducing the glare and scattering of the surgical light source, improving the image contrast, making the retinal structure clearer, and helping the surgeon to operate precisely in the microscopic field of view.

[0101] The adapter in this embodiment can be used in conjunction with or without an imaging system for surgical procedures according to actual needs, such as a camera optical imaging interface device, a camera imaging interface, a camera optical imaging interface, an adapter imaging interface, etc. Clear fundus images or videos of the patient can be seen on a monitor, a television, or a computer. If the images are not clear, the rotation adjustment knob 18 can be rotated for fine focus adjustment until clear imaging appears. Note that since it is posterior segment imaging of the eye, the fundus part of the patient observed through the pupil is imaged in an inverted manner. At this time, it needs to be used in conjunction with an image inverter and a surgical microscope (publication number ZL202322071670X).

[0102] For parts or structures not specifically described in the present invention, existing technologies or existing products can be adopted, and no further elaboration will be made here.

[0103] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformations made by using the content of the specification of the present invention, directly or indirectly applied in other related technical fields, are similarly included in the patent protection scope of the present invention.

Claims

1. A non-contact fundus imaging wide-angle lens adapter for a surgical microscope, characterized in that: include: A connection assembly for detachably mounting the adapter to the surgical microscope; Mobile components; Focus adjustment assembly; Wide-angle lens mounting assembly, used to install wide-angle lenses of different models; The movable component is arranged on the connecting component, the movable component is detachably connected to the focal length adjustment component, the focal length adjustment component is detachably connected to the wide-angle lens mounting component, the wide-angle lens can rotate synchronously with the focal length adjustment component and / or adjust the height, and can also move synchronously with the movable component to adjust the horizontal position.

2. The non-contact fundus imaging wide-angle lens adapter for a surgical microscope according to claim 1, characterized in that: The moving component is arranged below the connecting component, and the focus adjustment component and the wide-angle lens can be driven to slide in or out below the connecting component through the moving component.

3. The non-contact fundus imaging wide-angle lens adapter for a surgical microscope according to claim 1, characterized in that: The connecting component includes a connecting plate, on which a plurality of slots and connecting holes are provided for detachably mounting the adapter on the surgical microscope. A track and a slider are provided below the connecting plate, and the moving component is connected to the slider. The slider is mounted on the track and can reciprocate along the track, driving the moving component to move synchronously.

4. The non-contact fundus imaging wide-angle lens adapter for a surgical microscope according to claim 3, characterized in that: Magnetic blocks are respectively arranged at the head and tail ends of the track, and the magnetism of the slider is opposite to that of the magnetic block.

5. The non-contact fundus imaging wide-angle lens adapter for a surgical microscope according to claim 3, characterized in that: The slider is provided with a groove, and positioning holes are respectively provided on opposite sides of the groove. The moving component includes a slider, and a mounting groove for accommodating a lens is provided on one side of the slider, and a protruding block matched with the groove is provided on the other side of the slider, and positioning grooves matched with the positioning holes are respectively provided on opposite sides of the protruding block. The slider can be connected to the slider by inserting the protruding block into the groove and inserting the connecting piece into the positioning hole through the positioning groove. When the slider moves along the track, it can drive the slider and the focal length adjustment component and the wide-angle lens thereon to move synchronously.

6. The non-contact fundus imaging wide-angle lens adapter for a surgical microscope according to claim 1, characterized in that: The focus adjustment assembly includes a support, an adjustment seat, a focus adjustment rod and an adjustment knob. The focus adjustment rod vertically passes through the support and is fixed on the adjustment seat. By rotating the adjustment knob, the focus adjustment rod can be controlled to move vertically back and forth under the guidance of the support, and the adjustment seat and the wide-angle lens can be synchronously driven to move vertically back and forth, thereby adjusting the height of the wide-angle lens, thereby adjusting the focal length of fundus imaging.

7. The non-contact fundus imaging wide-angle lens adapter for a surgical microscope according to claim 6, characterized in that: The focal length adjustment rod comprises an active rod and a driven rod arranged in parallel, a plurality of teeth are arranged on the active rod, the active rod and the driven rod are connected together through an intermediate plate, and the active rod and the driven rod vertically pass through a support and are fixed on an adjustment seat.

8. The non-contact fundus imaging wide-angle lens adapter for a surgical microscope according to claim 6, characterized in that: The support includes a first mounting support and a second mounting support, wherein the first mounting support is detachably connected to the lower ends of the second mounting support, and the upper end of the second mounting support is detachably connected to the moving component.

9. The non-contact fundus imaging wide-angle lens adapter for a surgical microscope according to claim 8, characterized in that: A gear rod is inserted into the first mounting support, and adjustment knobs are respectively installed at opposite ends of the gear rod. The teeth on the gear rod are meshed with the teeth on the active rod. By rotating the adjustment knob, the gear rod is driven to rotate synchronously, driving the active rod to reciprocate vertically under the guidance of the support, thereby driving the adjustment seat and the wide-angle lens to reciprocate vertically.

10. The non-contact fundus imaging wide-angle lens adapter for a surgical microscope according to claim 8, characterized in that: The upper end of the second mounting support is connected to the slide of the moving component through an intermediate connecting seat and a rotating seat. A third through hole is opened on the side of the intermediate connecting seat. A fixing groove is arranged on the top surface of the intermediate connecting seat. A raised column adapted to the fixing groove is arranged under the slide. The surface of the fixing groove in contact with the raised column and the raised column are both magnetically treated and have opposite magnetic properties. The connection between the moving component and the focal length adjustment component is achieved by inserting the raised column into the fixing groove. A second fixed groove is arranged on the rotating seat. The connection is achieved by inserting the rotating seat into the third through hole and embedding the upper end of the second mounting support into the second fixed groove. The second mounting support and the rotating seat can rotate left and right, thereby driving the wide-angle lens to rotate synchronously.

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