Therapeutic device for laser treatment of the fundus retina and system thereof

Abstract

The utility model discloses a kind of treatment device and system for laser treatment fundus retina, including slit light source module, imaging module, focusing module and control module, slit light source module, imaging module and focusing module are connected control module;Slit light source module includes illumination light source, and the illumination light of illumination light source is successively shot into human eye after passing through fixed slit device, illumination mirror group, illumination scanning component, objective lens group;After being reflected, the reflected light of the shot is passed through objective lens group and enters imaging module, imaging module and slit light source module are set to non-coaxial light path;Imaging module includes imaging mirror group and sensor, wherein fixed slit device and the retina of human eye are imaging conjugate relationship;Focusing module is independent of slit light source module.The device does not need to rely on other external image equipment, can directly on fundus retina clear imaging, can be conveniently positioned treatment point by doctor accurately, to carry out fast, accurate laser treatment.

Description

Technical Field

[0001] This utility model relates to the field of ophthalmic laser equipment technology, specifically to a treatment device and system for laser treatment of the fundus retina. Background Technology

[0002] Current laser treatment techniques for the fundus in patients with diabetic retinopathy (DR), macular degeneration, and other ophthalmic diseases primarily rely on visual observation by the physician under a slit lamp. Treatment sites are precisely targeted by manual laser manipulation or by using a two-dimensional galvanometer array for laser ablation. However, existing laser treatment devices often lack sufficient precision, mainly because they rely on the clinician's experience and judgment. This is particularly true for patients with central serous lesions, where lesion location requires images from angiography or OCTA ophthalmic imaging equipment; the precise location cannot be determined visually under a slit lamp. Utility Model Content

[0003] Therefore, this utility model provides a treatment device and system for laser treatment of the fundus retina to solve the problems of the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A treatment device for laser treatment of the retina includes a slit light source module, an imaging module, a focusing module, and a control module, wherein the slit light source module, the imaging module, and the focusing module are all connected to the control module.

[0006] The slit light source module includes an illumination source, and the illumination light emitted by the illumination source passes sequentially through a fixed slit device, an illumination lens group, an illumination scanning component, and an objective lens group before entering the human eye;

[0007] The reflected light emitted after being reflected by the human eye enters the imaging module through the objective lens group. The imaging module and the slit light source module are configured as non-coaxial optical paths. The imaging module includes an imaging lens group and a sensor, wherein the fixed slit device and the retina of the human eye have an imaging conjugate relationship.

[0008] The focusing module is independent of the slit light source module and is used to determine the imaging state of the imaging module.

[0009] Furthermore, the focusing module includes a focusing optical fiber. The focusing light first enters the focusing optical fiber, then passes through the collimating lens of the focusing light source, and then passes through a semi-transparent and semi-reflective lens before being split into two focusing beams. One focusing beam is transmitted through the semi-transparent and semi-reflective lens and then reflected by a mirror to the objective lens group. The other focusing beam is reflected by the semi-transparent and semi-reflective lens and then to the objective lens group. The objective lens group is used to form a focal point of the two focusing beams, and this focal point is conjugate to the focal plane of the imaging system.

[0010] Furthermore, the slit of the fixed slit device is a vertically or horizontally arranged rectangular narrow slit.

[0011] Furthermore, the lighting source includes a white light source and an infrared light source. The light emitted from the white light source and the infrared light source is collimated and then combined by a dichroic mirror. The combined light is then directed into the fixed slit device after passing through a light homogenizer.

[0012] Furthermore, the treatment device also includes a ZOOM component, which is used to adjust the spot size; the treatment light and / or aiming light are emitted from the ZOOM component and then pass through the scanning component and the objective lens group before entering the human eye.

[0013] Furthermore, the ZOOM component includes a light source optical fiber. The treatment light and / or aiming light enter the light source optical fiber and are emitted after passing through the ZOOM compensation lens group and the ZOOM zoom lens group. The air gap between the ZOOM compensation lens group and the ZOOM zoom lens group is used to adjust the spot diameter.

[0014] Furthermore, the therapeutic light includes multiple selectable wavelengths.

[0015] Furthermore, the therapeutic light and / or aiming light enter the light source optical fiber through a collimating lens, a dichroic mirror, and a coupling lens.

[0016] Furthermore, the control module includes a tracking submodule, which is connected to the sensor of the imaging module; the tracking submodule is used to track the movement of the eyeball in real time.

[0017] A treatment system for laser treatment of the retina includes a power supply system, a display and interaction system, and the treatment device described in any one of the above.

[0018] The power supply system includes a power filter, a power supply, and a power switch. The power supply is connected to the power filter, and the power filter is connected to the treatment device through the power switch.

[0019] The various modules in the treatment device are connected by transmission wires;

[0020] The display and interaction system is connected to the control module.

[0021] This utility model has the following advantages:

[0022] This invention provides a treatment device and system for laser treatment of the fundus retina. By employing slit light, a focusing module, and an imaging optical path design, the device can directly and clearly image the fundus retina without relying on other external imaging equipment. This allows doctors to accurately locate treatment points and perform rapid and precise laser treatment. Attached Figure Description

[0023] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0025] Figure 1 This is a hardware structure diagram of the treatment device provided in an embodiment of the present utility model, where the dashed lines represent optical paths;

[0026] Figure 2 A schematic diagram of the slit imaging principle in the treatment device provided in this embodiment of the utility model;

[0027] Figure 3 A coupling diagram of the treatment light source and the aiming light source in the treatment device provided in this embodiment of the utility model;

[0028] Figure 4 Comparison of focusing effects in the treatment device provided in this embodiment of the utility model;

[0029] Figure 5 A structural diagram of the treatment system provided in an embodiment of this utility model.

[0030] In the picture:

[0031] 1. Slit light source module; 2. Illumination light source; 3. Fixed slit device; 4. Illumination mirror assembly; 5. Illumination scanning component; 6. White light source; 7. Infrared light source; 8. Illumination collimating lens; 9. Illumination dichroic mirror; 10. Light homogenizer;

[0032] 11. Objective lens group; 12. Human eye;

[0033] 13. Imaging module; 14. Imaging lens group; 15. Sensor;

[0034] 16. Aiming module; 17. Aiming light source; 18. Aiming light control submodule; 19. Aiming light recognition submodule;

[0035] 20. Laser treatment module; 21. Light source fiber; 22. ZOOM module; 23. ZOOM compensation lens group; 24. ZOOM zoom lens group; 25. Scanning module; 26. Collimating lens; 27. Dichroic mirror; 28. Coupling lens; 29. ​​Treatment light source;

[0036] 30. Focusing module; 31. Focusing fiber; 32. Collimating lens for focusing light source; 33. Semi-transparent and semi-reflective lens; 34. Reflector;

[0037] 35. Control module;

[0038] 36. Real-time eye tracking submodule;

[0039] 37. Display and interaction systems. Detailed Implementation

[0040] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] Example 1

[0042] like Figure 1 , 5As shown, a treatment device for laser treatment of the retina includes a slit light source module 1, an imaging module 13, a focusing module 30, and a control module 35. The slit light source module 1, the focusing module 30, and the imaging module 13 are all connected to the control module 35. The slit light source module 1 includes an illumination source 2. The illumination light emitted from the illumination source 2 passes sequentially through a fixed slit device 3, an illumination lens group 4, an illumination scanning component 5, and an objective lens group 11 before entering the human eye 12. The reflected light, after being reflected by the human eye 12, passes through the objective lens group 11 and enters the imaging module 13. The imaging module 13 includes an imaging lens group 14 and a sensor 15. The reflected light passes through the imaging lens group 14 and enters the sensor 15. The fixed slit device 3 and the retina of the human eye 12 have an imaging conjugate relationship. The focusing module 30 is independent of the slit light source module 1 and is used to determine the imaging state of the imaging module 13.

[0043] 1. Slit Light Source Module

[0044] The slit light source module includes an illumination source 2, a fixed slit device 3, an illumination mirror group 4, and an illumination scanning component 5. The illumination source 2 and the illumination scanning component 5 are both connected to the control module 35.

[0045] The illumination source 2 includes a white light source 6 and an infrared light source 7, capable of performing color and near-infrared imaging of the fundus. The light emitted by the illumination source 2 includes white light and infrared light. The white light and infrared light are collimated by their respective illumination collimating lenses 8, and then combined by an illumination dichroic mirror 9. The combined light beam passes through a light homogenizer 10 and enters a fixed slit device 3, where the light path can be modified by a reflector to meet the requirements of the light path design. The light homogenizer 10 can use a compound eye, a light homogenizing rod, or directly use the Köhler illumination method.

[0046] In this embodiment, the fixed slit device 3 employs a fixed mechanical slit. The slit in the fixed slit device 3 is a vertically or horizontally arranged rectangular slit, where the length of the rectangle is significantly greater than its width, typically 10 to 30 times. The light from the source, after passing through the fixed slit device 3, passes through the illumination lens group 4, the illumination scanning assembly 5, the objective lens, and the eyepiece objective lens before being imaged onto the retina. The illumination scanning assembly 5, under the control of the control module, scans at a fixed frequency to achieve position scanning of the slit light on the fundus. The scanning direction is along the short side of the rectangular slit, so the illuminated area on the retina is a rectangle scanned at a fixed frequency. The illumination scanning assembly 5 can be a scanning galvanometer or other scanning device.

[0047] This embodiment uses slit light and makes the fixed slit device 3 and the retina have an imaging conjugate relationship, which can effectively eliminate stray light reflected by the optical lens and obtain a clearer retinal image for subsequent laser treatment.

[0048] 2. Imaging module

[0049] The imaging module includes an imaging lens group 14 and a sensor 15, which is connected to the control module 35. By configuring the imaging module and the slit light source module as a non-coaxial optical path, rapid slit scanning imaging can be achieved. In this embodiment, the sensor 15 is a CMOS camera.

[0050] The reflected light, after being reflected by the human eye 12, passes through the objective lens group 11 and enters the imaging module 13. Specifically, it first passes through the imaging lens group 14 and then enters the CMOS camera. The CMOS camera images the illuminated retinal area and then transmits the image to the control module 35. The CMOS camera's pixels are exposed line by line to ensure that the pixels corresponding to the retinal illumination area are active, while other positions are inactive. Figure 2 As shown in the figure, the double diagonal line area is the slit light area. The pixels of the CMOS camera are in an active state within the slit light area. The remaining area is the non-illuminated area, and the pixels of the CMOS camera 15 are in an inactive state within the non-illuminated area.

[0051] The pixel activation of the CMOS camera is controlled and triggered by the scanning signal of the illumination scanning component 5. Therefore, the scanning frequency of the illumination scanning component 5 and the imaging frame rate of the CMOS camera must be kept consistent to ensure image quality.

[0052] 3. Laser therapy module

[0053] The treatment device further includes a laser treatment module 20, which comprises a treatment light source 29, a zoom component 22, and a scanning component 25. The scanning component 25 is connected to the control module 35. In this embodiment, the scanning component 25 is an XY galvanometer or a device capable of adjusting the light beam in a two-dimensional direction, such as a two-dimensional MEMS galvanometer or a piezoelectric galvanometer, which is used to change the position of the laser on the retina.

[0054] The therapeutic light source 29 may include multiple selectable wavelengths, such as 532nm, 577nm, 810nm, etc., and the specific wavelength is selected according to the therapeutic purpose during application.

[0055] The therapeutic light emitted from the therapeutic light source 29 passes through the ZOOM component 22, then sequentially through the scanning component 25, a dichroic mirror, and the objective lens group 11 before entering the human eye 12 to treat lesions in the fundus. The ZOOM component 22 is used to adjust the spot size. The ZOOM component 22 contains a light source fiber 21. The therapeutic light emitted from the light source fiber 21 passes through the ZOOM compensation lens group 23 and the ZOOM zoom lens group 24 before exiting. The spot diameter of the therapeutic light is adjusted by changing the air gap between the ZOOM compensation lens group 23 and the ZOOM zoom lens group 24.

[0056] The control module 35 adjusts the scanning parameters of the scanning component 25 in real time based on the eye-tracking results to meet the needs of precision treatment.

[0057] 4. Aiming Module

[0058] The treatment device also includes an aiming module 16. The aiming module 16 includes an aiming light source 17, an aiming light control submodule 18, and an aiming light recognition submodule 19. Both the aiming light control submodule 18 and the aiming light recognition submodule 19 are connected to the control module 35.

[0059] The aiming light source 17 preferably uses the infrared band for aiming at the target position in front of the retina during laser treatment. The aiming light emitted by the aiming light source 17 passes through the ZOOM component 22, then sequentially through the scanning component 25, the dichroic mirror, and the objective lens group 11 before entering the human eye 12, in order to locate the target point before laser treatment.

[0060] The aiming light control submodule 18 is used to adjust the power and frequency of the aiming light source 17.

[0061] The aiming light recognition submodule 19 is used to identify the position of the aiming light spot, thereby guiding the treatment light. Through real-time image processing algorithms, it quickly and accurately locates the aiming light spot in dynamically changing fundus images and registers it with the target lesion, thus ensuring the precise treatment by the treatment light source 29. The control module constructs a closed-loop control logic for the aiming light recognition system through real-time feedback as follows: acquire fundus images → extract the aiming light spot → calculate the positional offset between the aiming light and the target point → dynamically correct the aiming light position.

[0062] like Figure 3 As shown, the aiming light source 17 and the treatment light source 29 are collimated by the collimating lens 26, and then pass through the dichroic mirror 27 and the coupling lens 28 before finally entering the light source fiber 21.

[0063] 5. Focusing module

[0064] The treatment device also includes a focusing module 30, whose optical path is independent of that of the slit light source module 1, and is used to determine the imaging status of the imaging module. The focusing module 30 is connected to the control module 35.

[0065] The focusing module 30 includes a focusing fiber 31, a focusing light source collimating lens 32, a semi-transparent and semi-reflective lens 33, and a reflecting mirror 34. The focusing light emitted from the focusing fiber 31 first enters the focusing fiber 31, then passes through the focusing light source collimating lens 32, and then passes through the semi-transparent and semi-reflective lens 33 before being split into two focusing beams. One focusing beam is transmitted through the semi-transparent and semi-reflective lens 33 and then reflected by the reflecting mirror 34 and directed towards the objective lens group 11. The other focusing beam is reflected by the semi-transparent and semi-reflective lens 33 and then directed towards the objective lens group 11. The objective lens group 11 is used to form a focal point between the two focusing beams, and this focal point is conjugate to the focal plane of the imaging system.

[0066] This embodiment uses a focusing module to determine the imaging state of the imaging module in order to obtain the best retinal image. For example... Figure 4 As shown, when the focal points of the two focusing beams in the image of the CMOS camera separate, it indicates that the image is in a defocused state. The control module 35 controls the objective lens group 11 to move back and forth along the optical axis for adjustment. When the two focusing beams in the image of the CMOS camera coincide, it indicates that the focusing state of the imaging module is good and imaging can be performed.

[0067] 6. Tracking Submodule

[0068] The control module includes a tracking submodule 36 for real-time tracking of eye movements. The tracking submodule 36 is connected to the sensors of the imaging module, and images or videos acquired by the sensors are sent to the tracking submodule 36 in real time. The tracking submodule 36 utilizes unique anatomical structures such as the retinal vascular network as natural and stable reference markers, comparing the feature patterns in the current fundus image with those in pre-stored reference images in real time. Through the tracking submodule, the target area (such as diseased retinal tissue or blood vessels) can be precisely located in real time during treatment, compensating for unavoidable minor eye movements (such as microsaccades, nystagmus, and drift), dynamically adjusting for deviations in the planned point caused by eye movements, and further controlling the movement of the scanning component 25 to ensure high-precision targeted laser treatment.

[0069] Example 2

[0070] A treatment system for laser treatment of the fundus retina includes a power supply system, a display and interaction system, and the treatment device described in Example 1.

[0071] The power supply system includes a power filter, a power supply, and a power switch. The power supply is connected to the power filter, and the power filter is connected to the treatment device through the power switch.

[0072] The various modules in the treatment device are connected by transmission wires.

[0073] The display and interaction system includes a monitor, mouse and keyboard, key lights, and a control module.

[0074] The working principle of the whole machine treatment system is as follows:

[0075] 1) The first step is to turn on the power switch to activate the treatment device and the display and interaction system.

[0076] 2) In the second step, the rift light source module and imaging module work, and the control module controls the white light source or near-infrared light source 7, the illumination scanning galvanometer 5, and the sensor 15 to work.

[0077] 3) In the third step, turn on the focusing light source, adjust the objective lens group 11 so that the two focusing beams of the focusing module overlap (focusing), then take a picture of the patient's retina, save the picture, and turn off the focusing light source after focusing is complete.

[0078] 4) The fourth step is to image the patient's retina, and then plan the treatment points and pre-set the treatment parameters at the lesion locations in the retinal image.

[0079] 5) In the fifth step, the slit light source module and imaging module are restarted to provide a high-speed real-time video stream. The control module controls the eye-tracking submodule, and the treatment planning points are superimposed on the retina. The tracking submodule compensates for eye movements in real time to ensure that the position of the treatment points remains unchanged.

[0080] 7) The sixth step is to activate the aiming module, and the aiming light control submodule and aiming light recognition submodule will work to ensure that the aiming light falls on the planned treatment point.

[0081] 8) The seventh step is that the laser treatment module starts working. The diameter of the treatment spot is adjusted by moving the ZOOM compensation lens 23 and the ZOOM zoom lens 24 to the preset spot diameter.

[0082] 9) Step 8: The treatment light source 29 automatically outputs power (including preset power and pulse time) according to the preset treatment position.

[0083] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A treatment device for laser treatment of the retina, characterized in that: The treatment device includes a slit light source module, an imaging module, a focusing module, and a control module, wherein the slit light source module, the imaging module, and the focusing module are all connected to the control module; The slit light source module includes an illumination source, and the illumination light emitted by the illumination source passes sequentially through a fixed slit device, an illumination lens group, an illumination scanning component, and an objective lens group before entering the human eye; The reflected light emitted after being reflected by the human eye enters the imaging module through the objective lens group. The imaging module and the slit light source module are configured as non-coaxial optical paths. The imaging module includes an imaging lens group and a sensor, wherein the fixed slit device and the retina of the human eye have an imaging conjugate relationship. The focusing module is independent of the slit light source module and is used to determine the imaging state of the imaging module.

2. The treatment device for laser treatment of the retina according to claim 1, characterized in that: The focusing module includes a focusing optical fiber. The focusing light first enters the focusing optical fiber, then passes through the collimating lens of the focusing light source, and then passes through a semi-transparent and semi-reflective lens before being split into two focusing beams. One focusing beam is transmitted through the semi-transparent and semi-reflective lens and then reflected by a mirror and directed towards the objective lens group. The other focusing beam is reflected by the semi-transparent and semi-reflective lens and then directed towards the objective lens group. The objective lens group is used to form a focal point of the two focusing beams, and this focal point is conjugate to the focal plane of the imaging system.

3. The treatment device for laser treatment of the retina according to claim 1, characterized in that: The slit of the fixed slit device is a rectangular narrow slit that is set vertically or horizontally.

4. The treatment device for laser treatment of the retina according to claim 1, characterized in that: The lighting source includes a white light source and an infrared light source. The light emitted from the white light source and the infrared light source is collimated and then combined by a dichroic mirror. The combined light is then directed into the fixed slit device after passing through a light homogenizer.

5. The treatment device for laser treatment of the retina according to claim 1, characterized in that: The treatment device also includes a ZOOM component, which is used to adjust the spot size; the treatment light and / or aiming light are emitted from the ZOOM component and then pass through the scanning component and the objective lens group before entering the human eye.

6. The treatment device for laser treatment of the retina according to claim 5, characterized in that: The ZOOM component contains a light source optical fiber. The treatment light and / or aiming light enter the light source optical fiber, pass through the ZOOM compensation lens group and the ZOOM zoom lens group, and are emitted. The air gap between the ZOOM compensation lens group and the ZOOM zoom lens group is used to adjust the spot diameter.

7. The treatment device for laser treatment of the retina according to claim 6, characterized in that: The therapeutic light includes multiple selectable wavelengths.

8. The treatment device for laser treatment of the retina according to claim 6, characterized in that: The therapeutic light and / or aiming light enter the light source optical fiber through a collimating lens, a dichroic mirror, and a coupling lens.

9. The treatment device for laser treatment of the retina according to claim 1, characterized in that: The control module includes a tracking submodule, which is connected to the sensor of the imaging module; the tracking submodule is used to track the movement of the eyeball in real time.

10. A treatment system for laser treatment of the retina, characterized in that: Includes a power supply system, a display and interaction system, and the treatment device according to any one of claims 1-9; The power supply system includes a power filter, a power supply, and a power switch. The power supply is connected to the power filter, and the power filter is connected to the treatment device through the power switch. The various modules in the treatment device are connected by transmission wires; The display and interaction system is connected to the control module.

Images