Fundus imaging device

Abstract

The utility model discloses a fundus imaging device, and relates to the technical field of medical instruments, the fundus imaging device comprises a light source module, a guide rail assembly and two imaging modules, the light source module is used for emitting two laser beams; the guide rail assembly and the light source module are arranged in a spaced mode and extend in the first direction. The two imaging modules are both connected to the guide rail assembly in a sliding mode, each imaging module comprises an illumination light path and an imaging light path, the two illumination light paths receive the two laser beams emitted by the light source module and are used for emitting light and illuminating the two fundus, and the two imaging light paths are used for collecting images reflected by the two fundus. According to the scheme of the utility model, two fundus images can be imaged at one time, and the imaging efficiency is obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, especially a kind of fundus imaging device. BACKGROUND

[0002] Fundus imaging device can photograph the fundus of user, and it is one of commonly used ophthalmic medical instruments.

[0003] For example, for diabetic patients, by photographing the fundus of two eyes of patient, the condition of patient can be judged, which can achieve effective diagnosis.

[0004] However, the fundus imaging device can only photograph the fundus of one eye at a time, and cannot photograph the fundus of both eyes at the same time, resulting in low imaging efficiency. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to provide a kind of fundus imaging device, to realize imaging to two fundus at a time, to improve imaging efficiency.

[0006] To achieve the above purpose, the fundus imaging device provided by the utility model, the fundus imaging device includes light source module, guide rail assembly and two imaging modules, the light source module is used to emit two laser beams;The guide rail assembly and the light source module are spaced apart and extend along the first direction;Two imaging modules are slidably connected to the guide rail assembly, and two imaging modules each include an illumination light path and an imaging light path, two illumination light paths receive two laser beams emitted by the light source module, for light illumination to two fundus, two imaging light paths are used to collect the image reflected by two fundus.

[0007] In an embodiment, the fundus imaging device further includes a driving assembly, the driving assembly and the guide rail assembly are spaced apart and drivingly connected to two imaging modules to drive two imaging modules to slide along the guide rail assembly respectively.

[0008] In an embodiment, the driving assembly includes a driving motor and a screw rod, the driving motor and the guide rail assembly are spaced apart and have a driving shaft rotating around the first direction, the screw rod is connected to the driving shaft to rotate the driving shaft, and two imaging modules are threadedly connected to the screw rod to reciprocate in the direction of approaching or moving away from each other.

[0009] In one embodiment, the fundus imaging device further includes a detection component and a controller, the detection component including a signal transmitter and a signal receiver, the signal receiver being connected to the guide rail component, the signal transmitter being connected to the drive shaft so as to rotate with the drive shaft and transmit a sensing signal to the signal receiver, the controller determining the distance between the two imaging modules based on the sensing signal received by the signal receiver, and controlling the driving action of the drive component based on the distance.

[0010] In one embodiment, the fundus imaging device further includes a limiting member, which is connected to the guide rail assembly and is located between the two imaging modules to limit the movement of the two imaging modules.

[0011] In one embodiment, the imaging module extends perpendicular to the first direction and has multiple sliding parts. There are multiple guide rail assemblies, and the multiple guide rail assemblies are spaced apart perpendicular to the first direction. One sliding part is slidably connected to one guide rail assembly.

[0012] In one embodiment, the light source module includes a laser and a beam splitter, the beam splitter has an input end and two output ends, the input end is coupled to the laser output by the laser, and the two output ends transmit the laser to the receiving ends of the two imaging modules.

[0013] In one embodiment, the light source module further includes two optical fibers, one of the optical fibers is connected between the output end and the receiving end.

[0014] In one embodiment, each of the imaging modules includes a shell, a semi-transparent and semi-reflective mirror, and a camera element. The shell is slidably connected to the guide rail assembly. The shell forms a light-guiding space. The semi-transparent and semi-reflective mirror is arranged in the light-guiding space and on the side facing the light source module to receive the laser of the light source module, so that the laser is irradiated to the fundus along a first path, and the laser reflected by the fundus is irradiated to the camera element along a second path.

[0015] In one embodiment, the imaging module further includes an aperture, disposed on a side of the semi-transparent mirror facing the light source module. The aperture comprises a light-blocking region and a light-transmitting region. The light-blocking region is located in the center of the aperture to block laser light on the optical axis, and the light-transmitting region is disposed around the light-blocking region to allow laser light to pass through and propagate toward the semi-transparent mirror. And / or, each imaging module further includes a scanning assembly, disposed between the semi-transparent mirror and the fundus, to enable the laser light irradiating the fundus to move along a predetermined path.

[0016] In the technical solution of this utility model, the light source module emits two laser beams, each used to illuminate the fundus region of the user's two eyeballs. Two imaging modules are slidably connected to the guide rail assembly, each imaging module comprising an illumination optical path and an imaging optical path. The illumination optical path receives the laser light emitted by the light source module and guides it to the corresponding fundus for illumination; the imaging optical path is responsible for capturing the light reflected from the fundus and converting it into digital images for storage. The fundus images collected by the imaging module are further processed and analyzed for diagnosis by the doctor.

[0017] Therefore, the two imaging modules of the present invention can be quickly adjusted as needed to accommodate different eye distances, allowing for imaging of both fundi in a shorter timeframe, significantly improving imaging efficiency. Furthermore, the light source module is independently positioned and does not slide with the imaging module, reducing vibration and interference caused by mechanical movement, helping to maintain the stability and consistency of the light source, and ultimately improving the imaging quality of the fundus imaging device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of an embodiment of a fundus imaging device provided by the present invention;

[0020] Figure 2 for Figure 1 An imaging optical path structure diagram of an embodiment of the imaging module;

[0021] Figure 3 for Figure 2 Schematic diagram of the structure of the middle aperture.

[0022] Explanation of the accompanying reference numerals: 10. Fundus imaging device; 1. Light source module; 11. Laser; 13. Beam splitter; 15. Optical fiber; 3. Guide rail assembly; 5. Imaging module; 51. Shell; 511. Light guiding space; 52. Collimator; 521. Receiving end; 53. Lens group; 54. Aperture; 541. Light blocking area; 543. Light passing area; 55. Semi-transparent and semi-reflective mirror; 56. Camera; 57. Scanning assembly; 571. First reflector; 572. Rotating mirror; 573. Second reflector; 574. Fourth reflector; 58. Eyepiece; 6. Driving assembly; 61. Driving motor; 611. Driving shaft; 63. Screw; 7. Detection assembly; 71. Signal transmitting element; 73. Signal receiving element; 81. Limiting element; 90. Eyeball; 91. Fundus.

[0023] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0025] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] Fundus imaging devices are commonly used in ophthalmology, taking photos of the user's fundus. For example, for diabetic patients, taking photos of both fundus can help determine their condition and provide an effective diagnosis.

[0028] However, current fundus imaging devices can only take fundus photos of one eye at a time, but cannot take fundus photos of both eyes at the same time, resulting in low imaging efficiency.

[0029] In order to solve the above problems, the present invention proposes a fundus imaging device 10, which aims to image two fundi at a time to improve imaging efficiency.

[0030] Reference Figures 1 to 3 In one embodiment of the present utility model, the fundus imaging device 10 includes a light source module 1, a guide rail assembly 3 and two imaging modules 5. The light source module 1 is used to emit two laser beams; the guide rail assembly 3 and the light source module 1 are arranged at intervals and extend along a first direction; the two imaging modules 5 are both slidably connected to the guide rail assembly 3, and the two imaging modules 5 include an illumination optical path and an imaging optical path. The two illumination optical paths receive the two laser beams emitted by the light source module 1 and are used to illuminate the two fundi 91. The two imaging optical paths are used to collect images reflected by the two fundi 91.

[0031] The light source module 1 is a key component of the fundus imaging device 10, primarily used to generate and emit laser light, providing the necessary light source for imaging the fundus 91. The guide rail assembly 3 is used to support and guide the imaging module 5 in a predetermined direction, allowing for adjustment of its position to accommodate patients with varying interpupillary distances. Specifically, the guide rail assembly 3 typically includes a guide rail body and a slider. The guide rail body is the fixed portion, while the slider is connected to the imaging module 5 and can slide on the rail.

[0032] The main function of the illumination optical path is to guide the laser to the fundus 91, ensuring that the fundus 91 is evenly illuminated so that the imaging module 5 can clearly capture the image of the fundus 91. The main function of the imaging optical path is to transmit the image reflected by the fundus 91 to the camera 56, ensuring that the image can be accurately captured.

[0033] In the technical solution of the present invention, the light source module 1 emits two laser beams, each used to illuminate the fundus 91 of the user's two eyeballs 90. Two imaging modules 5 are slidably connected to the guide rail assembly 3, each of which includes an illumination optical path and an imaging optical path. The illumination optical path receives the laser light emitted by the light source module 1 and guides it to the corresponding fundus 91 for illumination; the imaging optical path is responsible for capturing the light reflected from the fundus 91 and converting it into a digital image for storage. The fundus 91 images collected by the imaging module 5 are further processed and analyzed for diagnosis by the doctor.

[0034] Therefore, the two imaging modules 5 of the present invention can be quickly adjusted as needed to accommodate different eye distances, allowing for imaging of both fundi in a shorter timeframe, significantly improving imaging efficiency. Furthermore, the light source module 1 is independently positioned and does not slide with the imaging module 5, reducing vibration and interference caused by mechanical movement, helping to maintain the stability and consistency of the light source, and thereby improving the imaging quality of the fundus imaging device 10.

[0035] Reference Figure 1 In one embodiment of the present invention, the fundus imaging device 10 further includes a driving component 6, which is spaced apart from the guide rail component 3 and is driven and connected to the two imaging modules 5 to drive the two imaging modules 5 to slide along the guide rail component 3 respectively.

[0036] In this embodiment, the presence of the drive assembly 6 allows the imaging module 5 to automatically adjust to the appropriate position without manual adjustment, simplifying the operation process and reducing human error. The automated adjustment mechanism can significantly shorten preparation time and improve overall examination efficiency, which is particularly important when rapidly screening a large number of patients.

[0037] Reference Figure 1 In one embodiment of the present invention, the driving assembly 6 includes a driving motor 61 and a screw 63. The driving motor 61 and the guide rail assembly 3 are spaced apart and have a driving shaft 611 that rotates around a first direction. The screw 63 is connected to the driving shaft 611 to rotate the driving shaft 611. The two imaging modules 5 are respectively threadedly connected to the screw 63 to reciprocate in directions of approaching or moving away from each other.

[0038] In this embodiment, the linkage design of the screw 63 and the drive shaft 611 can easily achieve the mutual approach or distance of the imaging modules 5 by changing the rotation direction of the drive motor 61, which is suitable for patients with different pupil distances.

[0039] Specifically, the two imaging modules 5 have two thread transmission blocks with different thread rotation directions. The rotation of the screw 63 is driven by the same drive motor 61, and the relative movement of the two thread transmission blocks is driven by the same screw 63, which is beneficial to further ensure the movement synchronization of the two imaging modules 5.

[0040] Reference Figure 1 In one embodiment of the present invention, the fundus imaging device 10 further includes a detection component 7 and a controller. The detection component 7 includes a signal transmitter 71 and a signal receiver 73. The signal receiver 73 is connected to the guide rail component 3. The signal transmitter 71 is connected to the drive shaft 611 to rotate with the drive shaft 611 and transmits a sensing signal to the signal receiver 73. The controller determines the distance between the two imaging modules 5 based on the sensing signal received by the signal receiver 73, and controls the driving action of the drive component 6 based on the distance.

[0041] In this embodiment, the detection component 7 can monitor the position changes of the imaging module 5 in real time. The controller adjusts the action of the driving component 6 according to the position information provided by the detection component 7 to ensure that the imaging module 5 is always in the correct relative position, thereby improving the stability and accuracy of the system.

[0042] Reference Figure 1 In one embodiment of the present invention, the fundus imaging device 10 further includes a limiting member 81 , which is connected to the guide rail assembly 3 and is located between the two imaging modules 5 to limit the movement of the two imaging modules 5 .

[0043] In this embodiment, the position limiter 81 prevents the imaging module 5 from moving beyond a predetermined range, thereby preventing damage to the device or imaging failure caused by excessive movement. The position limiter 81 also ensures that each adjustment of the imaging module 5's position remains within a reasonable range, ensuring imaging consistency and repeatability.

[0044] Optionally, there are multiple limiting members 81 , which are slidably connected to the guide rail assembly 3 respectively, so that the sliding range of the imaging module 5 can be further flexibly limited by adjusting the position of the limiting member 81 on the guide rail assembly 3 .

[0045] Reference Figure 1 In one embodiment of the present invention, the imaging module 5 extends perpendicular to the first direction and has multiple sliding parts. The number of the guide rail assemblies 3 is multiple, and the multiple guide rail assemblies 3 are arranged at intervals perpendicular to the first direction. One of the sliding parts is slidably connected to one of the guide rail assemblies 3.

[0046] In this embodiment, the cooperation between the multiple sliding parts and the multiple guide rail assemblies 3 can provide multiple stable support points for the imaging module 5, thereby reducing the imaging deviation caused by mechanical vibration or external interference.

[0047] Specifically, the guide rail assembly 3 is recessed with a slide groove extending along the first direction, the sliding portion is inserted into and limited to the slide groove, and slides along the slide groove, thereby realizing automatic sliding of the imaging module 5 on the guide rail assembly 3.

[0048] Reference Figure 2 In one embodiment of the present invention, the light source module 1 includes a laser 11 and a beam splitter 13. The beam splitter 13 has an input end and two output ends. The input end is coupled to the laser output by the laser 11, and the two output ends transmit the laser to the receiving ends 521 of the two imaging modules 5.

[0049] In this embodiment, a single laser 11 is used and split into two beams via a beam splitter 13. This simplifies the design of the light source, reduces the overall complexity of the device, and lowers costs. Beam splitter 13 ensures uniform energy distribution between the two laser beams, ensuring consistent illumination intensity for both eyes, thereby improving the consistency of imaging quality. Furthermore, the design of beam splitter 13 allows the device to adjust the energy ratio of the two laser beams as needed to accommodate different examination requirements or the specific conditions of the patient's eyes.

[0050] Reference Figure 2 In one embodiment of the present invention, the light source module 1 further includes two optical fibers 15 , and one of the optical fibers 15 is connected between one of the output ends and one of the receiving ends 521 .

[0051] In this embodiment, the use of optical fiber 15 allows for greater spatial freedom in the layout between the laser source and imaging module 5, eliminating distance restrictions and allowing for flexible placement of various device components. Furthermore, compared to direct air transmission, optical fiber 15 transmission reduces energy loss and improves light transmission efficiency, ensuring sufficient laser intensity reaching the fundus 91.

[0052] Reference Figure 2 In one embodiment of the present utility model, each of the imaging modules 5 includes a shell 51, a semi-transparent and semi-reflective mirror 55 and a camera element 56. The shell 51 is slidably connected to the guide rail assembly 3. The shell 51 forms a light-guiding space 511. The semi-transparent and semi-reflective mirror 55 is arranged in the light-guiding space 511 and is arranged on the side facing the light source module 1 to receive the laser of the light source module 1, so that the laser is irradiated to the fundus 91 along a first path, and the laser reflected by the fundus 91 is irradiated to the camera element 56 along a second path.

[0053] In this embodiment, the shell 51 integrates the semi-transparent half-mirror 55 and the camera 56, making the entire imaging module 5 a compact unit, reducing the size of the device, and improving portability and installation flexibility. Through the design of the light guide space 511 in the shell 51, the laser can be irradiated from the light source module 1 to the fundus 91 through the semi-transparent half-mirror 55, and then the laser reflected by the fundus 91 is guided to the camera 56 again through the semi-transparent half-mirror 55, ensuring effective use of light and imaging quality. The design of the semi-transparent half-mirror 55 allows the laser and the reflected laser to travel along different paths, reducing mutual interference between light, and improving the clarity and contrast of the image.

[0054] In addition, each imaging module 5 has its own camera 56, which means that each camera 56 only needs to focus on the imaging of a single fundus 91, avoiding mutual interference between the images of the two fundus 91, thereby improving the clarity and resolution of the image. The independent camera 56 can better capture the details of each fundus 91, reducing the image distortion problems that may be introduced by double-channel imaging.

[0055] Optionally, the imaging module 5 further comprises a collimating element 52 and a lens group 53. The collimating element 52 has a receiving end 521 for receiving the laser conducted by the optical fiber 15 and emitting to the lens group 53 after shaping into a parallel light beam. The lens group 53 comprises a plurality of positive and negative lenses for adjusting the aberration of the laser, thereby ensuring the imaging quality.

[0056] Referring to Figure 2 and Figure 3 In an embodiment of the present application, the imaging module 5 further comprises a light barrier 54, which is arranged on the side of the semi-transparent half-mirror 55 facing the light source module 1. The light barrier 54 forms a light blocking area 541 and a light transmission area 543. The light blocking area 541 is located in the middle of the light barrier 54 to block the laser on the optical axis. The light transmission area 543 is annularly arranged on the side of the light blocking area 541 to allow the laser to pass through and propagate towards the semi-transparent half-mirror 55. And / or, each imaging module 5 further comprises a scanning assembly 57, which is arranged between the semi-transparent half-mirror 55 and the fundus 91, so that the laser irradiated to the fundus 91 can move according to a predetermined path.

[0057] In this embodiment, the eyeball 90 and the eyepiece 58 are easily reflected by the illumination light near the optical axis, thereby affecting the imaging of the fundus 91. Therefore, by providing an aperture 54 at the focal plane of the lens group 53, and configuring the aperture 54 as an annular aperture 54 that blocks light in the middle and allows light to pass around, the luminous flux of the illumination light can be controlled, and the illumination light originally directed to the surface of the eyeball 90 and the lens surface in the eyepiece 58 can be blocked, thereby preventing the surface of the eyeball 90 and the eyepiece 58 from reflecting the illumination light. In this way, most of the stray light sources in the imaging of the fundus 91 can be blocked, reducing the stray light interference with the imaging of the fundus 91 and improving the imaging effect of the fundus 91.

[0058] Optionally, the imaging module 5 further includes a scanning assembly 57, which can move the laser beam directed at the fundus 91 along a predetermined path, enabling the laser beam to scan different regions of the fundus 91, thereby obtaining a comprehensive image of the fundus 91 and further improving the imaging quality of the imaging module 5. Furthermore, the scanning assembly 57 can include, in sequence along the optical path, a first reflector 571, a rotating mirror 572, a second reflector 573, and a third reflector 574. The rotating mirror 572 can be rotatably arranged to reflect and output one-dimensional or two-dimensional scanning light. Each reflector is used to change the optical path to facilitate rotational reflection by the rotating mirror 572, thereby further miniaturizing the imaging module 5.

[0059] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fundus imaging device, characterized in that: The fundus imaging device comprises: A light source module, the light source module is used to emit two laser beams; a guide rail assembly, the guide rail assembly and the light source module are spaced apart and extend along a first direction; and Two imaging modules, both of which are slidably connected to the guide rail assembly, and both of which include an illumination light path and an imaging light path. The two illumination light paths receive two laser beams emitted by the light source module and are used to illuminate the two fundi. The two imaging light paths are used to collect images reflected by the two fundi.

2. The fundus imaging device according to claim 1, wherein The fundus imaging device further includes a driving component, which is spaced apart from the guide rail component and is drivingly connected to the two imaging modules to drive the two imaging modules to slide along the guide rail component respectively.

3. The fundus imaging device according to claim 2, wherein: The driving assembly includes a driving motor and a screw. The driving motor and the guide rail assembly are arranged at intervals and have a driving shaft that rotates around a first direction. The screw is connected to the driving shaft to rotate the driving shaft. The two imaging modules are respectively threadedly connected to the screw to reciprocate in directions of approaching or moving away from each other.

4. The fundus imaging device according to claim 3, wherein: The fundus imaging device also includes a detection component and a controller. The detection component includes a signal transmitter and a signal receiver. The signal receiver is connected to the guide rail component. The signal transmitter is connected to the drive shaft so as to rotate with the drive shaft and transmit an induction signal to the signal receiver. The controller determines the distance between the two imaging modules based on the induction signal received by the signal receiver, and controls the driving action of the drive component based on the distance.

5. The fundus imaging device according to any one of claims 1 to 4, characterized in that: The fundus imaging device further includes a limiting member connected to the guide rail assembly and located between the two imaging modules to limit the movement of the two imaging modules.

6. The fundus imaging device according to any one of claims 1 to 4, characterized in that: The imaging module extends perpendicular to the first direction and has a plurality of sliding parts. There are a plurality of guide rail assemblies, which are spaced apart perpendicular to the first direction. One sliding part is slidably connected to one guide rail assembly.

7. The fundus imaging device according to any one of claims 1 to 4, characterized in that: The light source module includes a laser and a beam splitter. The beam splitter has an input end and two output ends. The input end is coupled to the laser output by the laser, and the two output ends transmit the laser to the receiving ends of the two imaging modules.

8. The fundus imaging device according to claim 7, wherein: The light source module further includes two optical fibers, one of which is connected between the output end and the receiving end.

9. The fundus imaging device according to any one of claims 1 to 4, characterized in that: Each of the imaging modules includes a shell, a semi-transparent and semi-reflective mirror, and a camera element. The shell is slidably connected to the guide rail assembly. The shell forms a light-guiding space. The semi-transparent and semi-reflective mirror is arranged in the light-guiding space and on the side facing the light source module to receive the laser of the light source module, so that the laser is irradiated to the fundus along a first path, and the laser reflected by the fundus is irradiated to the camera element along a second path.

10. The fundus imaging device according to claim 9, wherein: The imaging module further includes an aperture, which is provided on a side of the semi-transparent and semi-reflective mirror facing the light source module. The aperture is formed with a light-blocking area and a light-transmitting area. The light-blocking area is located in the middle of the aperture to block the laser on the optical axis. The light-transmitting area is arranged around the light-blocking area to allow the laser to pass through and propagate toward the semi-transparent and semi-reflective mirror. And / or, each of the imaging modules further includes a scanning component, which is disposed between the semi-transparent and semi-reflective mirrors and the fundus, so that the laser irradiated to the fundus can move along a predetermined path.

Images