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

Abstract

The utility model discloses a non-contact fundus imaging wide-angle lens adapter for an operating microscope, and the adapter comprises a connecting 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 provided by the utility model is strong 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 adjust the imaging focal length more smoothly in the operation process.

Description

Technical Field

[0001] This utility model belongs to the field of microscope technology, specifically relating to a non-contact fundus imaging wide-angle lens adapter for surgical microscopes. Background Technology

[0002] In ophthalmic surgery, fundus imaging is a crucial auxiliary technology for surgical microscopy. Surgeons require clear images of the retina, vitreous body, and macula to precisely perform complex procedures such as vitrectomy and retinal detachment repair. The earliest fundus imaging methods primarily employed contact fundus imaging systems, which involved placing an ophthalmoscope directly on the surface of the patient's eyeball to obtain a stable, high-resolution field of view. While contact fundus imaging systems offered good image quality at the time, their limitations became increasingly apparent with technological advancements. The following are the main drawbacks and shortcomings of contact fundus imaging systems:

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

[0004] 11) Mechanical pressure causing corneal damage: Because the ophthalmoscope needs to directly contact the cornea or sclera, a certain amount of pressure will be applied to the eyeball during the operation. For patients with already high intraocular pressure (such as glaucoma patients), this pressure may increase intraocular pressure and increase the risk of postoperative complications; at the same time, continuous contact may lead to corneal epithelial edema or damage, prolong the postoperative recovery time, and may cause postoperative corneal inflammation;

[0005] 12) Requires a surgical incision, increasing the risk of trauma: Traditional contact retinal imaging requires a small incision at the limbus (usually used in vitrectomy) to insert a corneal trephine to stabilize the fundus camera. This process causes additional trauma to the ocular tissues, which may result in: slow postoperative wound healing and increased risk of infection; and intraoperative bleeding risk, especially for patients with hypertension, diabetes, etc.

[0006] 13) Increased discomfort during surgery: Because the ophthalmoscope comes into direct contact with the eyeball, patients may experience temporary foreign body sensation, corneal irritation symptoms, or even short-term vision loss after surgery. Furthermore, if the patient's eyeball moves during surgery, it may cause additional discomfort or affect the precision of the surgery.

[0007] 2) The surgical procedure is complex and difficult, requiring a high level of skill from the surgeon:

[0008] 21) Because the fundus scope needs to be placed stably on the eyeball, the doctor must carefully adjust the angle during the operation to avoid the fundus scope from sliding or shifting, otherwise it may cause image distortion and affect the accuracy of the operation.

[0009] Furthermore, additional assistants are needed during the procedure to fix the fundus camera, which increases the burden on the surgical team.

[0010] 22) Because the ophthalmoscope directly covers the surface of the eyeball, some models may affect the surgeon's field of view during surgery, resulting in limited operating space for certain complex surgeries (such as retinal reattachment surgery and vitrectomy).

[0011] The fixation method of traditional contact systems requires doctors to spend extra time adjusting the microscope's focus or field of view, which affects surgical efficiency.

[0012] 3) Limited intraoperative imaging affects image quality:

[0013] 31) Limited field of view: The field of view of contact fundus imaging is usually between 30° and 90°, which is a small range of observation. Doctors need to frequently adjust the angle to view the complete fundus structure, which increases the difficulty of the operation.

[0014] Limited field of vision may make it difficult for doctors to observe the peripheral areas of the fundus during surgery, especially lesions in the peripheral retinal region (such as peripheral tears);

[0015] 32) It is susceptible to the condition of the eyeball during surgery. If corneal edema or vitreous opacity occurs during surgery, it will affect light transmission and reduce image clarity. If the eyeball is subjected to pressure changes during surgery (such as changes in internal pressure during vitrectomy), it may cause fluctuations in image quality and affect the doctor's judgment.

[0016] 33) Optical reflection and astigmatism interference: Since the fundus lens is in direct contact with the cornea, it is easy to generate reflection on the corneal surface when the light source is shone, resulting in local overexposure or blurred imaging in the field of vision. Corneal astigmatism may affect the contrast of the image, which may interfere with the doctor's observation of subtle lesions (such as macular degeneration).

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

[0018] 41) Corneal injury leads to delayed recovery: The cornea is compressed during surgery and may take several days to several weeks to recover. Some patients may experience transient corneal edema or decreased vision.

[0019] For patients with corneal diseases (such as corneal degeneration or corneal ulcers), contact fundus imaging may worsen the condition and prolong postoperative recovery time.

[0020] 42) Higher risk of postoperative infection: Since contact ophthalmoscopes come into direct contact with the eyeball during surgery, any bacterial contamination may increase the risk of postoperative infection, especially in long surgeries (such as vitrectomy), where the chance of infection is even higher.

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

[0022] To address these challenges, the Resight non-contact wide-angle lens from Carl Zeiss of Germany was developed, but it still has many limitations:

[0023] (1) It is only applicable to Zeiss’s own high-end surgical microscopes. It has poor compatibility and is not compatible with other brands or low-end models of surgical microscopes. It requires the purchase of Zeiss brand microscope systems, and the cost of a single system is as high as tens of thousands of US dollars. Many grassroots hospitals, mobile medical units and medical institutions in developing countries cannot afford the expensive equipment purchase costs, which limits the promotion of fundus vitrectomy.

[0024] Due to the high cost, many hospitals, even those with surgical microscopes, are unable to perform vitrectomy, forcing patients to be referred to higher-level medical institutions and delaying treatment.

[0025] (2) Many hospitals still have surgical microscopes that can be used normally, but due to the lack of fundus imaging capabilities, they cannot perform vitrectomy.

[0026] In order to use the Resight non-contact wide-angle microscope, the hospital must purchase a brand new Zeiss high-end microscope system, resulting in duplicate investment in equipment and increased medical costs. Utility Model Content

[0027] To address the technical problems existing in the prior art, the purpose of this utility model is to provide a non-contact fundus imaging wide-angle lens adapter for surgical microscopes.

[0028] To achieve the above objectives and technical effects, the technical solution adopted by this utility model 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] Mobile components;

[0032] Focus adjustment component;

[0033] Wide-angle lens mounting kit for mounting different models of wide-angle lenses;

[0034] The moving component is disposed on the connecting 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 can rotate synchronously with the focal length adjustment component and / or adjust its height. It can also move synchronously with the moving component to adjust its horizontal position.

[0035] Furthermore, the movable component is located below the connecting component, and the movable component can drive the focus adjustment component and the wide-angle lens to slide in or out below the connecting component.

[0036] Furthermore, the connecting component includes a connecting plate with several slots and connecting holes for detachably mounting the adapter to the surgical microscope. A track and a slider are provided below the connecting plate. The moving component is connected to the slider, which is mounted on the track and can reciprocate along the track, driving the moving component to move synchronously.

[0037] Furthermore, magnetic blocks are respectively provided at both ends of the track, and the magnetic properties of the slider are opposite to those of the magnetic blocks.

[0038] Furthermore, the slider has a groove, and positioning holes are respectively provided on opposite sides of the groove. The moving component includes a sliding plate. One side of the sliding plate has a mounting groove for accommodating the lens, and the other side of the sliding plate has a protrusion that matches the groove. Positioning grooves that match the positioning holes are respectively provided on opposite sides of the protrusion. By inserting the protrusion into the groove and simultaneously inserting the connector through the positioning groove into the positioning hole, the sliding plate and the slider can be connected together. When the slider moves along the track, it can drive the sliding plate and its focal length adjustment component and wide-angle lens to move synchronously.

[0039] Furthermore, the focal length adjustment assembly includes a support, an adjustment base, a focal length adjustment rod, and an adjustment knob. The focal length adjustment rod passes vertically through the support and is fixed on the adjustment base. By rotating the adjustment knob, the focal length adjustment rod can be controlled to move vertically back and forth under the guidance of the support, which simultaneously drives the adjustment base and the wide-angle lens to move vertically back and forth, thereby adjusting the height of the wide-angle lens and thus adjusting the focal length of the fundus imaging.

[0040] Furthermore, the focal length adjustment rod includes a driving rod and a driven rod arranged in parallel. The driving rod is provided with a plurality of teeth. The driving rod and the driven rod are connected together by an intermediate plate. The driving rod and the driven rod pass vertically through the support and are fixed on the adjustment 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, and the upper end of the second mounting support is detachably connected to the movable component.

[0042] Furthermore, a gear rod is inserted into the first mounting bracket, and adjustment knobs are respectively installed at opposite ends of the gear rod. The teeth on the gear rod mesh with the teeth on the drive rod. By rotating the adjustment knob, the gear rod is driven to rotate synchronously, which in turn drives the drive rod to reciprocate vertically under the guidance of the bracket, thereby driving the adjustment seat and the wide-angle lens to reciprocate vertically.

[0043] Furthermore, the upper end of the second mounting bracket is connected to the slide plate of the moving component via an intermediate connecting seat and a rotating seat. The intermediate connecting seat has a third through hole on its side and a fixing groove on its top surface. A protruding post that matches the fixing groove is provided below the slide plate. Both the surface of the fixing groove that contacts the protruding post and the protruding post are magnetically treated, and their magnetic properties are opposite. The moving component and the focus adjustment component are connected by inserting the protruding post into the fixing groove. The rotating seat has a second fixing groove. The connection is achieved by inserting the rotating seat into the third through hole and embedding the upper end of the second mounting bracket into the second fixing groove. The second mounting bracket 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 this utility model are as follows:

[0045] (1) It has strong adaptability and is compatible with almost all brands and models of surgical microscopes, such as Zeiss, Leica, Moeller-Weide, Topcon, etc., which greatly expands the scope of application of the equipment and has a greater market demand; it is suitable for older models of microscopes, enabling them to perform fundus vitrectomy surgery and avoiding hospitals being unable to carry out related surgeries due to equipment incompatibility.

[0046] (2) It can modify old equipment. By simply replacing or adding an adapter, old or ordinary microscopes can be equipped with non-contact fundus imaging capabilities, thus enabling fundus vitrectomy surgery. There is no need to purchase a brand new microscope, saving hospitals a lot of equipment upgrade costs and reducing long-term investment costs. It is suitable for hospitals of different levels to purchase. All lenses in this utility model use high-transmittance optical lenses, which can achieve high-definition fundus imaging, close to the imaging quality of Resight lenses, but the price is much lower than Zeiss Resight lenses, making it more cost-effective and easier to promote and popularize.

[0047] (3) All lenses in this utility model use high-resolution aspherical lenses, which can provide a larger field of view, up to 120°-130°, which is wider than traditional contact imaging systems and close to the field of view of high-end systems. Combined with anti-reflective coating technology, transparent dielectric films are coated on the lenses. The refractive index of these films is different from that of glass. Through interference, they effectively reduce the reflected light in a specific wavelength range, thereby improving the light transmittance and reducing reflection loss. The lenses can pass through more light, improving image clarity, reducing ghosting and glare, improving image contrast, enhancing visual comfort, and making the image more natural and sharp for the viewer. It also improves imaging performance in nighttime or backlight environments, reduces glare and scattering of surgical light sources, improves image contrast, makes the retinal structure clearer, and helps the surgeon to operate accurately in the microscopic field of view.

[0048] (4) It has automatic focusing and image stabilization technology, which can maintain clear imaging even when the eye moves, thus improving the accuracy of the surgery.

[0049] (5) The adapter is easy to install, requires no complicated debugging, and has stepless focusing function, which can improve the efficiency of doctors' surgery.

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

[0051] (7) Applicable to medical institutions at all levels:

[0052] High-end hospitals: Providing low-cost upgrade solutions for hospitals that already have surgical microscopes, avoiding redundant investment in equipment;

[0053] Primary care hospitals and clinics: Help hospitals with limited funds to perform vitrectomy surgery and improve their medical service capabilities;

[0054] Mobile medical units: suitable for scenarios such as mobile medical vehicles, field hospitals, and disaster relief medical care, enabling medical teams to perform ophthalmic surgery in non-standard operating room environments;

[0055] Developing countries and regions with limited medical resources: Provide more economical surgical microscope upgrade solutions to improve accessibility for retinal disease surgery. Attached Figure Description

[0056] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0057] Figure 2 This is a three-dimensional structural diagram of the connecting component of this utility model;

[0058] Figure 3 This is a three-dimensional structural diagram of the mobile component of this utility model;

[0059] Figure 4 This is a schematic diagram of the installation of the connecting component and the moving component of this utility model;

[0060] Figure 5 This is an exploded view of the focus adjustment component of this utility model.

[0061] Figure 6 This is a schematic diagram of the focal length adjustment assembly of this utility model when the first mounting support is not installed. Detailed Implementation

[0062] The present invention will now be described in detail so that its advantages and features can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0063] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0064] like Figure 1-6 As 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] Mobile components;

[0067] Focus adjustment component;

[0068] Wide-angle lens mounting kit for mounting different models of wide-angle lenses;

[0069] The movable component is located below the connecting component. The movable component is detachably connected to the focal length adjustment component, and 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 adjust its height. The movable component can drive the focal length adjustment component and the wide-angle lens 1 to slide in or out below the connecting component to adjust their horizontal position.

[0070] In some embodiments, the connecting assembly includes a connecting plate 2 and several slots 3 and connecting holes 4 disposed thereon, which can be adapted to almost all brands and models of microscopes on the market, such as Zeiss, Leica, Olympus, Moeller-Weider, Topcon, and domestic surgical microscopes, greatly expanding the applicability of the equipment. It should also be noted that the size and position of the reserved slots 3 and connecting holes 4 may not be the same for different brands and models of surgical microscopes. It is necessary to select appropriate screws, bolts, etc. according to different brands and models of surgical microscopes to ensure that the adapter fits the surgical microscope perfectly.

[0071] In some embodiments, the moving component includes a sliding plate 5. One side of the sliding plate 5 has a mounting groove 6 for accommodating a lens. A protrusion 7 of a certain length is provided at the middle of the other side of the sliding plate 5. Positioning grooves 8 are provided on opposite sides of the protrusion 7. Side holes 81, which are adapted to the positioning grooves 8, are provided on the sides of the sliding plate 5 and communicate with the positioning grooves 8. A track 9 and a slider 10 are provided below the connecting plate 2. The slider 10 is mounted on the track 9 and can reciprocate along the track 9. A groove 11, adapted to the protrusion 7, is provided at the middle of the slider 10. The length of the groove 11 can penetrate the slider 10. The dimensions of the protrusion 7 and the groove 11 can be flexibly designed according to actual needs. Positioning holes 12, adapted to the positioning grooves 8, are provided on opposite sides of the groove 11. The protrusion 7 is inserted into the groove 11, and simultaneously, a connector 13 (screw, bolt, etc.) is inserted through the positioning groove 8 into the positioning hole 12, thus connecting the sliding plate 5 and the slider 10 together. When the slider 10 moves along the track 9, it can drive the sliding plate 5 to move synchronously. When needed by the doctor, the slide plate 5 can be pulled by hand to slide directly below the large objective lens of the surgical microscope for surgery. At this time, the lens installed in the mounting slot 6 is coaxial with the large objective lens of the surgical microscope. When not in use, the slide plate 5 can be pushed by hand to slide back to the starting position for standby, without affecting the operation.

[0072] In some embodiments, the lens installed in the mounting slot 6 can be selected as f175mm or f200mm according to the size of the large objective lens of the surgical microscope, so as to make a correct fit and be compatible with f175mm microscope objectives and f200mm objectives available on the market.

[0073] In some embodiments, the beginning and end ends of the track 9 are subjected to weak magnetic treatment, so that the slider 10 can be magnetically attracted to the beginning and end ends of the track 9, ensuring that the slider 10 does not sway in other places in the middle of the track 9.

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

[0075] In some embodiments, a protruding post 14 is provided below the slide plate 5 to enable the connection between the moving component and the focus adjustment component.

[0076] In some implementations, the focus adjustment component and the moving component are magnetically attached together, making them very convenient to use. The focus adjustment component and the moving component can be attached when brought close together, and can be separated by applying force, eliminating the hassle 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. The focal length adjustment rod 17 includes a parallel active rod 171 and a driven rod 172. The active rod 171 has several teeth 173. The active rod 171 and the driven rod 172 are connected together by an intermediate plate 174. The intermediate plate 174 has holes for the active rod 171 and the driven rod 172 to pass vertically through. The active rod 171 and the driven rod 172 pass vertically through 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 reciprocate vertically under the guidance of the support 15, which simultaneously drives the adjustment seat 16 and the wide-angle lens 1 to reciprocate vertically, thereby adjusting the height of the wide-angle lens 1 and thus adjusting the focal length of the fundus imaging, achieving a clear and sharp imaging effect, allowing ophthalmologists to see every detail without pressure during surgery.

[0078] In some specific embodiments, the support 15 includes a first mounting support 151 and a second mounting support 152. 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. The top surface of the first mounting support 151 has two first through holes 153 for vertically inserting the driving rod 171 and the driven rod 172, respectively. The side of the first mounting support 151 has openings for inserting a gear rod. The second through hole 154 of 21 has a first fixing groove 155 on the side of the first mounting bracket 151 facing the second mounting bracket 152. The lower end of the second mounting bracket 152 is embedded in the first fixing groove 155 and connected together by conventional mechanical means such as screws and bolts. The two opposite ends of the gear rod 21 are respectively equipped with adjustment knobs 18 through shims 181. The teeth on the gear rod 21 mesh with the teeth 173 on the drive rod 171. By rotating the adjustment knobs 18, the gear rod 21 can be driven to rotate synchronously, thereby driving the drive rod 171 to move vertically back and forth under the guidance of the bracket 15.

[0079] More specifically, a third through hole 191 is opened on the side of the intermediate connecting seat 19, and a fixing groove 192 is provided on the top surface of the intermediate connecting seat 19. The surface of the fixing groove 192 that contacts the protruding column 14 and the protruding column 14 are both magnetically treated, and their magnetic properties are opposite. The protruding column 14 is inserted into the fixing groove 192, and the connection between the moving component and the focus adjustment component can be realized simultaneously through magnetic adsorption and mechanical connection, making the connection between the moving component and the focus adjustment component more reliable. A second fixing groove 201 is provided at one end of the rotating seat 20, and a flange 202 is provided at the other end of the rotating seat 20. 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 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 others connected to it to rotate synchronously.

[0080] In some embodiments, the wide-angle lens mounting assembly includes a wide-angle lens temple 22 and a mounting slot 23 for mounting the wide-angle lens 1, wherein the wide-angle lens temple 22 is vertically mounted in a vertical through hole 161 on the adjustment seat 16.

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

[0082] In some embodiments, this invention is based on anti-reflective coating technology, preferably by coating one or more layers of transparent dielectric film on the lens. The refractive index of the film is different from that of glass, and through interference, it can effectively reduce reflected light in a specific wavelength range, thereby achieving the following effects: increasing light transmittance, reducing reflection loss, and allowing more light to pass through the lens; improving image clarity, reducing ghosting and glare, and improving image contrast; enhancing visual comfort, making the image more natural and sharp for the viewer; improving imaging performance in nighttime or backlit environments; reducing glare and scattering from surgical light sources, improving image contrast, making the retinal structure clearer, and helping the surgeon to operate precisely in a microscopic field of vision.

[0083] Example 1

[0084] like Figure 1-6 As 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] Mobile components;

[0087] Focus adjustment component;

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

[0089] The movable component is located below the connecting component. The movable component is detachably connected to the focal length adjustment component, and 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 adjust its height. The movable component can drive the focal length adjustment component and the wide-angle lens 1 to slide in or out below the connecting component to adjust their horizontal position.

[0090] In this embodiment, the connecting assembly includes a connecting plate 2 and two slots 3 and multiple connecting holes 4 disposed thereon. The slots 3 and connecting holes 4 are designed by the applicant for matching with different microscopes on the market, thus enabling compatibility with almost all brands and models of microscopes on the market, such as Zeiss, Leica, Olympus, Moeller-Weider, Topcon, and domestically produced surgical microscopes, significantly expanding the applicability of the equipment. It should also be noted that the size and position of the slots 3 and connecting holes 4 may differ for different brands and models of surgical microscopes. Appropriate screws need to be selected according to the brand and model of the surgical microscope to ensure a tight fit between the adapter and the microscope. In practical applications, the applicant can provide screws compatible with different brands and models of microscopes.

[0091] The moving component includes a sliding plate 5. One side of the sliding plate 5 has a mounting groove 6 for accommodating a lens. A protrusion 7 of a certain length is located in the middle of the other side of the sliding plate 5. Positioning grooves 8 are symmetrically arranged on opposite sides of the protrusion 7. Side holes 81, which mate with the positioning grooves 8, are symmetrically arranged on the side of the sliding plate 5 and communicate with the positioning grooves 8. A track 9 and a slider 10 are arranged below the connecting plate 2. The slider 10 is mounted on the track 9 and can reciprocate along the track 9. A groove 11, which mates with the protrusion 7, is located in the middle of the slider 10. The length of the groove 11... A positioning hole 12, which matches the positioning groove 8, is symmetrically arranged on both sides of the groove 11 through the slider 10. The protrusion 7 is inserted into the groove 11, and the connector 13 (screw) is inserted into the positioning hole 12 through the positioning groove 8, thus connecting the slide plate 5 and the slider 10 together. A magnetic protrusion 14 is provided below the slide plate 5. When the slider 10 moves along the track 9, it can drive the slide plate 5 to move synchronously. The applicant's design ensures that when the slider 10 slides to the front end, the lens installed in the mounting groove 6 and the large objective lens of the surgical microscope are concentrically aligned. When the doctor needs to use it, the adapter of this embodiment is directly inserted into the slot 3 and connecting hole 4 using the matching screws to complete the installation of the adapter and the target microscope, such as Zeiss or Leica. After installation, when the slider 10 slides to the front end of the track 9, the lens on the adapter and the large objective lens of the target microscope are concentrically aligned, allowing surgery to be performed. When not in use, the slide plate 5 can be manually pushed back to the starting position for standby without affecting the surgery.

[0092] The lens installed in mounting slot 6 can be selected as either f175mm or f200mm according to the size of the large objective lens of the surgical microscope, so as to make a correct fit and be compatible with f175mm microscope objectives and f200mm objectives available on the market.

[0093] The first and last ends of track 9 are treated with weak magnetism. Magnetic blocks are set at the first and last ends of track 9. The magnetism of slider 10 is opposite to that of the magnetic blocks. When slider 10 slides to the front end (first end) of track 9, the two are magnetically attracted to each other. When slider 10 slides to the rear end (last end) of track 9, the two are magnetically attracted to each other, ensuring that slider 10 does not swing in other places in the middle of track 9.

[0094] The focus adjustment assembly includes a support 15, an adjustment seat 16, a focus adjustment rod 17, and an adjustment knob 18. The focus adjustment rod 17 includes a parallel active rod 171 and a driven rod 172. The active rod 171 has several teeth 173. The active rod 171 and the driven rod 172 are connected together by an intermediate plate 174. The intermediate plate 174 has holes for the active rod 171 and the driven rod 172 to pass vertically through. The active rod 171 and the driven rod 172 pass vertically through the support 15 and are fixed to the adjustment seat 16. By rotating the adjustment knob 18, the focus adjustment rod 17 can be controlled to reciprocate vertically under the guidance of the support 15, which simultaneously drives the adjustment seat 16 and the wide-angle lens 1 to reciprocate vertically. This achieves the purpose of adjusting the height of the wide-angle lens 1, thereby adjusting the focal length of the fundus imaging, achieving a clear and sharp imaging effect, allowing ophthalmologists to see every detail without pressure during surgery.

[0095] Specifically, the support 15 includes a first mounting support 151 and a second mounting support 152. 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. The top surface of the first mounting support 151 has two first through holes 153 for vertically inserting the driving rod 171 and the driven rod 172, respectively. The side of the first mounting support 151 has a second through hole 153 for inserting the gear rod 21. Two through holes 154, a first fixing groove 155 is opened on the side of the first mounting bracket 151 facing the second mounting bracket 152, the lower end of the second mounting bracket 152 is embedded in the first fixing groove 155 and connected together by screws, the two opposite ends of the gear rod 21 are respectively installed with adjusting knobs 18 through washers 181, the teeth on the gear rod 21 mesh with the teeth 173 on the drive rod 171, and the gear rod 21 can be driven to rotate synchronously by rotating the adjusting knobs 18, thereby driving the drive rod 171 to move vertically back and forth under the guidance of the bracket 15.

[0096] A third through hole 191 is opened on the side of the intermediate connecting seat 19, and a fixing groove 192 is provided on the top surface of the intermediate connecting seat 19. The surface of the fixing groove 192 that contacts the protruding post 14 and the protruding post 14 are both magnetically treated, and their magnetic properties are opposite. The protruding post 14 is inserted into the fixing groove 192, and the moving component and the focus adjustment component can be connected simultaneously through magnetic adsorption and mechanical connection, making the connection between the moving component and the focus adjustment component more reliable and very convenient to use. The focus adjustment component and the moving component can be attracted when they are close together, and can be disconnected by hand, eliminating the trouble of installation.

[0097] 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 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 others connected to it to rotate synchronously, thereby folding up the adapter, saving space, and not affecting other ophthalmic surgeries.

[0098] The wide-angle lens mounting assembly includes a wide-angle lens temple 22 and a mounting slot 23 for mounting the wide-angle lens 1. The wide-angle lens temple 22 is vertically mounted in a vertical through hole 161 on the adjustment base 16. When installing the wide-angle lens 1, the temple 22 is held directly and inserted into the vertical through hole 161 without touching or contaminating the wide-angle lens 1.

[0099] Since the focal length of ophthalmic surgical microscopes is generally between 175mm and 200mm, this embodiment sets the focal length base at 170mm. By rotating the adjustment knob 18, a mechanical adjustment range of ±30mm can be achieved, ensuring that ophthalmic surgery can be performed with a focal length between 175mm and 200mm.

[0100] All lenses in this embodiment, including the wide-angle lens 1 and the lens mounted in the mounting slot 6, employ high-transmittance, high-resolution aspherical lenses. This enables high-definition fundus imaging, approaching the image quality of Zeiss lenses, but at a significantly lower price, making them more cost-effective, easier to promote and popularize. They also provide a wider field of view, reaching 120°-130°, wider than traditional contact imaging systems and approaching the field of view of high-end systems. Furthermore, based on anti-reflective coating technology, the lenses in this embodiment are coated with a transparent dielectric film with a different refractive index than glass. Through interference, this effectively reduces reflected light within a specific wavelength range, thereby increasing transmittance and reducing reflection loss. The lenses allow more light to pass through, improving image clarity, reducing ghosting and glare, enhancing image contrast, and improving visual comfort. For the viewer, the image appears more natural and sharper, improving imaging performance in nighttime or backlit environments, reducing glare and scattering from surgical light sources, increasing image contrast, and making the retinal structure clearer, thus helping surgeons operate precisely in a microscopic field of vision.

[0101] The adapter in this embodiment can be used with or without an imaging system involving surgery, such as a camera optical imaging interface device, camera imaging interface, or adapter image interface, depending on actual needs. A clear image or video of the patient's fundus can be viewed on a monitor, television, or computer. If the image is unclear, the adjustment knob 18 can be rotated for micro-focus adjustment until a clear image appears. Note that because it is posterior segment imaging, the image of the patient's fundus observed through the pupil is inverted. Therefore, it needs to be used in conjunction with an image inversion switcher and a surgical microscope (publication number ZL202322071670X).

[0102] The parts or structures not specifically described in this utility model can be made using existing technology or existing products, and will not be elaborated here.

[0103] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A surgical microscope non-contact fundus imaging widefield lens adapter, characterized by, The utility model relates to a surgical microscope adapter, which comprises: a connecting assembly for detachably mounting the adapter to a surgical microscope; a moving assembly; a focal length adjusting assembly; a wide-angle lens mounting assembly for mounting different types of wide-angle lenses; the moving assembly is arranged on the connecting assembly, the moving assembly is detachably connected with the focal length adjusting assembly, the focal length adjusting assembly is detachably connected with the wide-angle lens mounting assembly, the wide-angle lens can rotate and / or be adjusted in height synchronously with the focal length adjusting assembly, and can move synchronously with the moving assembly to adjust the horizontal position.

2. A non-contact fundus imaging wide-field adapter for surgical microscopes according to claim 1, characterized in that the moving assembly is arranged below the connecting assembly, and the focal length adjusting assembly and the wide-angle lens can be slid in or out below the connecting assembly through the moving assembly.

3. The non-contact fundus imaging wide-field adapter for surgical microscopes according to claim 1, characterized in that the connecting assembly comprises a connecting plate, a plurality of holes and connecting holes are formed in the connecting plate, and the adapter is detachably mounted to the surgical microscope, a track and a sliding block are arranged below the connecting plate, the moving assembly is connected with the sliding block, the sliding block is mounted on the track and can reciprocate along the track to drive the moving assembly to move synchronously.

4. The non-contact fundus imaging wide-field adapter for surgical microscopes according to claim 3, characterized in that magnetic blocks are arranged at the two ends of the track respectively, and the magnetic properties of the sliding block and the magnetic blocks are opposite.

5. The non-contact fundus imaging wide-field adapter for surgical microscopes according to claim 3, characterized in that a groove is formed in the sliding block, positioning holes are arranged on the opposite sides of the groove respectively, the moving assembly comprises a sliding plate, a mounting groove for accommodating a lens is formed in one side of the sliding plate, a protruding block matched with the groove is arranged on the other side of the sliding plate, positioning grooves matched with the positioning holes are arranged on the opposite sides of the protruding block, the sliding plate and the sliding block are connected together by inserting the protruding block into the groove and inserting the connecting piece through the positioning grooves into the positioning holes, and when the sliding block moves along the track, the sliding plate, the focal length adjusting assembly and the wide-angle lens thereon can move synchronously.

6. A non-contact fundus imaging wide angle lens adapter for surgical microscopes according to claim 1, characterized in that the focal length adjusting assembly comprises a support, an adjusting seat, a focal length adjusting rod and an adjusting knob, the focal length adjusting rod vertically penetrates through the support and is fixed on the adjusting seat, the focal length adjusting rod can vertically reciprocate under the guidance of the support by rotating the adjusting knob, the adjusting seat and the wide-angle lens are synchronously driven to vertically reciprocate, so that the height of the wide-angle lens is adjusted, and the focal length of the fundus imaging is adjusted.

7. A non-contact fundus imaging wide-field adapter for surgical microscopes according to claim 6, characterized in that the focal length adjusting rod comprises 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, and the driving rod and the driven rod vertically penetrate through the support and are fixed on the adjusting seat.

8. The non-contact fundus imaging wide-field adapter for surgical microscopes according to claim 6, characterized in that the support comprises a first mounting support and a second mounting support, the first mounting support and the second mounting support are detachably connected together at the lower ends, and the second mounting support is detachably connected with the moving assembly at the upper end.

9. A non-contact fundus imaging wide-field adapter for surgical microscopes according to claim 8, characterized in that a gear rod is inserted into the first mounting support, adjusting knobs are arranged at the opposite ends of the gear rod respectively, the teeth on the gear rod are engaged with the teeth on the driving rod, the gear rod is synchronously driven to rotate by rotating the adjusting knob, the driving rod vertically reciprocates under the guidance of the support, and the adjusting seat and the wide-angle lens are synchronously driven to vertically reciprocate.

10. The non-contact fundus imaging wide-field adapter for surgical microscopes according to claim 8, characterized in that The upper end of the second mounting support is connected with the sliding plate of the moving assembly through an intermediate connecting seat and a rotating seat, a third through hole is formed in the side surface of the intermediate connecting seat, a fixed recess is arranged on the top surface of the intermediate connecting seat, a protruding column which is matched with the fixed recess is arranged below the sliding plate, the surface of the fixed recess which is in contact with the protruding column and the protruding column are both subjected to magnetic treatment and the magnetism of the two is opposite, the connection between the moving assembly and the focal length adjusting assembly is realized by inserting the protruding column into the fixed recess, a second fixing groove is arranged on the rotating seat, the connection is realized by inserting the rotating seat into the third through hole and embedding the upper end of the second mounting support into the second fixing groove, the second mounting support and the rotating seat can rotate left and right, thereby driving the wide-angle mirror to rotate synchronously.

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