Fundus camera imaging system and fundus image screening system

Abstract

The utility model provides a fundus camera imaging system and a fundus image screening system, and belongs to the technical field of fundus cameras and medical treatment. The fundus camera imaging system comprises a shell, a communication module contained in the shell, an eye objective lens, a focusing objective lens, a first 1 / 4 wave plate, a CMOS sensor and a clamping structure arranged on the shell. The eye objective lens, the focusing objective lens, the first 1 / 4 wave plate, the CMOS sensor and the clamping structure are sequentially arranged along the light beam transmission direction; when the fundus images collected by the fundus camera imaging system need to be screened, the mobile terminal with the screening function is clamped in the clamping structure and electrically connected with the communication module of the fundus camera imaging system, the collected fundus images can be directly displayed on the display screen of the mobile terminal, and the fundus images and screening results thereof can be conveniently checked in real time; eye fundus images do not need to be exported. The clamping structure can also serve as a handheld part, so that the fundus imaging system can be held by a hand to shoot the fundus of the patient, and the structure of the fundus camera is effectively simplified.

Description

Technical Field

[0001] The present invention belongs to the field of fundus cameras and medical technology, and in particular relates to a fundus camera imaging system and a fundus image screening system. Background Art

[0002] At present, most of my country's ophthalmic technical forces are concentrated in large and medium-sized cities. The technical forces in rural areas and old, minority, border and poor areas with backward economy and technology are weak, and the diagnosis and treatment capabilities of major eye diseases that cause irreversible blindness, such as diabetic retinopathy, macular degeneration, and glaucoma, are weak. Moreover, in the current medical system, most of the treatments for diabetic retinopathy tend to be manual detection, which relies on previous knowledge and requires experienced ophthalmologists. In addition, the retinal image itself has a complex structure and is easily affected by various lesions. Therefore, in the process of diagnosing diabetic retinopathy, it is easy to consume a lot of manpower, material and financial resources, and the efficiency is low. It is very difficult to achieve early diagnosis of diabetic retinopathy or discover suspected cases. Many non-specialized medical institutions such as primary hospitals are even less experienced in this regard, resulting in misdiagnosis or missed diagnosis. Therefore, the necessity of using artificial intelligence for disease screening is becoming increasingly prominent.

[0003] However, the fundus camera included in the current screening system is installed on a support frame, which cannot be used for handheld shooting and is not convenient to carry. Moreover, after shooting, the fundus image needs to be exported to a computer terminal for analysis and screening on the computer terminal, which is cumbersome and inconvenient to view the fundus image and its screening results in real time. Utility Model Content

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art and provide a fundus camera imaging system and a fundus image screening system.

[0005] In one aspect of the present disclosure, a fundus camera imaging system is provided, comprising: a housing, a communication module, an eyepiece objective lens, a focusing objective lens, a first 1 / 4 wave plate, a CMOS sensor, and a clamping structure arranged on the housing; wherein:

[0006] The eyepiece objective lens, the focusing objective lens, the first 1 / 4 wave plate, the CMOS sensor, and the clamping structure are arranged in sequence along the light beam transmission direction;

[0007] When the fundus image collected by the fundus camera imaging system needs to be screened, the mobile terminal with the screening function is clamped in the clamping structure and electrically connected to the communication module of the fundus camera imaging system.

[0008] Optionally, the clamping structure includes a clamping body and a clamping portion arranged around the clamping body;

[0009] The clamping body is arranged perpendicular to the light beam transmission direction.

[0010] Optionally, a take-in and put-out opening is provided on the clamping portion.

[0011] Optionally, the communication module is a WIFI module.

[0012] Optionally, a USB interface is also provided on the shell.

[0013] Optionally, the eyepiece objective lens includes a first lens, a second lens, and a third lens, and a second 1 / 4 wave plate is arranged between the first lens and the second lens.

[0014] Optionally, the second quarter wave plate is arranged at an angle.

[0015] Optionally, the first quarter wave plate is arranged vertically along the light beam transmission direction.

[0016] Optionally, the entrance pupil diameter of the fundus camera imaging system is 3 mm.

[0017] In one aspect of the present disclosure, a fundus image screening system is provided, comprising: a fundus camera imaging system, a mobile terminal and a connector; wherein the fundus camera imaging system adopts the fundus camera imaging system described above, and the mobile terminal is provided with a processor;

[0018] When the fundus image of the patient needs to be screened, the mobile terminal is snapped into the snap-in structure of the fundus camera imaging system and connected to the fundus camera imaging system through the connector;

[0019] The fundus camera imaging system is used to obtain the fundus image to be screened;

[0020] The processor is used to compare the fundus image to be screened with the preset fundus image to obtain a screening result of the fundus image.

[0021] The present disclosure proposes a fundus camera imaging system and a fundus image screening system, wherein the fundus camera imaging system includes: a shell, a communication module accommodated in the shell, an eyepiece objective lens, a focusing objective lens, a first 1 / 4 wave plate, and a CMOS sensor sequentially arranged along the light beam transmission direction, and a snap-in structure arranged on the shell and away from the eyepiece objective lens; when it is necessary to screen the fundus image collected by the fundus camera imaging system, a mobile terminal with a screening function is snapped into the snap-in structure and electrically connected to the communication module of the fundus camera imaging system. The present disclosure can snap the mobile terminal into the fundus camera imaging system based on the snap-in structure, and can communicate with the mobile terminal based on the communication module, so that the fundus image collected by the fundus camera imaging system can be directly displayed on the display screen of the mobile terminal, which is convenient for medical staff to view the fundus image and its screening results in real time, without exporting the fundus image, and is simple to operate, effectively improving the screening efficiency; and

[0022] The snap-on structure can also be used as a handheld component, making it convenient for the handheld fundus imaging system to photograph the patient's fundus, without the need for traditional support frames and other structures, effectively simplifying the structure of the fundus camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a fundus camera imaging system according to an embodiment of the present disclosure;

[0024] Figure 2 This is a light path diagram of a fundus camera imaging system according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0026] In some descriptions of the present disclosure, unless otherwise clearly specified and limited, the terms "install", "connect", "connected" or "fixed" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect through an intermediate medium, and may be internal connections between two elements or mutual interactions between two elements. Also, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, are only used to indicate relative positional relationships, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] like Figure 1 and Figure 2 As shown, in one aspect of the present disclosure, a fundus camera imaging system 100 is proposed, comprising: a shell 110, a communication module accommodated in the shell 110, an eyepiece objective lens 111, a first 1 / 4 wave plate 112, a focusing objective lens 113, a CMOS sensor 114, and a snap-on structure 120 arranged on the shell 110; wherein the eyepiece objective lens 111, the first 1 / 4 wave plate 112, the focusing objective lens 113, the CMOS sensor 114, and the snap-on structure 120 are arranged in sequence along the light beam transmission direction, that is, the snap-on structure 120 is arranged on the shell 110 on the side of the CMOS sensor 114 away from the focusing objective lens 113, and when it is necessary to screen the fundus image collected by the fundus camera imaging system, the mobile terminal with the screening function is snapped into the snap-on structure 120 and electrically connected to the communication module of the fundus camera imaging system 100.

[0028] In this embodiment, by setting a communication module and a card-connecting structure in the fundus camera imaging system, on the one hand, the mobile terminal can be card-connected to the fundus camera imaging system based on the card-connecting structure, and the communication module can be used to communicate with the mobile terminal. In this way, the fundus image collected by the fundus camera imaging system can be directly displayed on the display screen of the mobile terminal, which is convenient for medical staff to view the fundus image and its screening results in real time without the need to export the fundus image, which is simple to operate and effectively improves the screening efficiency. On the other hand, since the card-connecting structure is arranged on the side away from the lens, the card-connecting structure can also be used as a handheld component, which is convenient for the handheld fundus imaging system to shoot the patient's fundus without the need for traditional support frames and other structures, effectively simplifying the structure of the fundus camera.

[0029] Combined Figure 2It can be seen that in actual application, the fundus camera imaging system is used to collect fundus images of the patient's left and right eyes respectively. After the light emitted by the light source passes through the aperture 130, it passes through the first lens 111a, the second 1 / 4 wave plate 115, the second lens 111b, and the third lens 111c in the eyepiece objective lens 111 in sequence to guide the light into the fundus, collect the light reflected by the fundus, and form a high-quality, low-distortion intermediate image plane, and then pass through the first 1 / 4 wave plate 112 and the focusing objective lens 113 to transmit the light reflected by the fundus to the CMOS sensor 114.

[0030] In this embodiment, a first 1 / 4 wave plate is arranged between the eyepiece objective lens and the focusing objective lens. The first 1 / 4 wave plate is arranged vertically along the light transmission direction, so that the imaging scattered light can pass through and reach the CMOS sensor, ensuring that the CMOS sensor only receives scattered light from the fundus, further reducing the mirror reflected light of the eye.

[0031] Furthermore, the clamping structure of this embodiment includes a clamping body and a clamping portion arranged around the clamping body; the clamping body is arranged perpendicular to the light beam transmission direction. That is, the clamping structure is arranged at one end of the shell, and the other end of the shell is the side where the light source enters.

[0032] In some preferred examples, the clamping portion is an annular structure, that is, the clamping portion includes four elastic clamping walls, and the four elastic clamping walls are arranged in a ring shape around the clamping body to form a groove-shaped clamping structure. In this way, when the mobile terminal is clamped in the clamping structure, it can be directly pressed into the clamping structure.

[0033] In other preferred examples, when the clamping portion is a ring-shaped structure, the side of the clamping portion facing away from the clamping body is bent inward, that is, the edge area of ​​the clamping portion is bent inward, so that when the mobile terminal is placed in the clamping structure, the bent area is used to clamp the mobile terminal in the clamping structure to prevent the mobile terminal from slipping.

[0034] In other preferred examples, in order to facilitate the taking and placing of the mobile terminal, a taking and placing opening is provided on the clamping portion. When the clamping portion includes four clamping walls, a taking and placing opening is respectively provided on two of the clamping walls which are arranged opposite to each other. The taking and placing opening is recessed inward from the side of the clamping wall which is away from the clamping body to form the taking and placing opening, which facilitates placing the mobile terminal in the clamping structure and also facilitates taking the mobile terminal out of the clamping structure.

[0035] It should be noted that the shape of the snap-on portion of the annular structure should match the shape of the mobile terminal. When the mobile terminal is a mobile phone, its shape and size should match those of the mobile phone. When the mobile terminal is a tablet computer, its shape and size should match those of the tablet computer.

[0036] Of course, in this embodiment, the clip-on structure is not limited to the above structure. In other preferred examples, the clip-on portion may also include two clip-on walls, one of which is fixedly disposed at one end of the clip-on body, and the other clip-on wall is movably disposed at the other end of the clip-on body, and can be freely adjusted according to the size of the mobile terminal to clip the mobile terminal into the clip-on structure.

[0037] Furthermore, the communication module may be a WIFI module.

[0038] In other preferred examples, when the communication module adopts a WIFI module, the WIFI module includes a WIFI communication chip, a video front end and auxiliary circuits, etc. Correspondingly, a communication interface should also be provided on the shell, and the communication interface is a USB interface.

[0039] In this embodiment, by setting a communication module in the fundus camera imaging system and connecting it to the mobile terminal for communication, the user can view the imaging effect of the fundus camera in real time through the screen of the mobile terminal, and can move the image position by clicking on the screen to obtain clearer and standard fundus images, thereby realizing the convenience of instant monitoring and operation.

[0040] It should be understood that a circuit board is also provided in the fundus camera imaging system to realize electrical connection with the focusing lens, the eyepiece lens and other structures, such as Figure 1 As shown, a circuit board 116 is further disposed in the housing 110 . The circuit board 116 is located on a side of the CMOS sensor 114 away from the focusing lens 113 , and the circuit board 116 is connected to the focusing lens 113 , the communication module and the communication interface.

[0041] Furthermore, it should be noted that the eyepiece objective lens in the current fundus camera includes three lenses, which only play the role of observation and magnification. When taking pictures, it needs to be used under the condition of mydriasis. There is a certain amount of stray light and the imaging ability is poor.

[0042] In view of this, in this embodiment, if Figure 1 and Figure 2 As shown, the eyepiece objective lens 111 includes a first lens 111a, a second lens 111b, and a third lens 111c, and a second 1 / 4 wave plate 115 is disposed between the first lens 111a and the second lens 111b. That is, in this embodiment, the first lens in the eyepiece objective lens is moved forward, and a second 1 / 4 wave plate is added between the first lens and the second lens. In this way, the focusing objective lens is driven by a micro-stepping motor, and the distance between the eyepiece objective lens and the focusing objective lens and the distance between the CMOS sensor and the focusing objective lens are further optimized until the image is clear, so that the image can be captured without dilation of the pupil.

[0043] In this embodiment, by adding a second 1 / 4 wave plate to the eyepiece objective, it can also reflect the illumination light, allowing the illumination light to enter the fundus through a single lens, thereby significantly reducing the stray light of the system and effectively improving the imaging capability. At the same time, it can also ensure that the fundus camera imaging system has better imaging capabilities within the human eye diopter range from -10D to +10D (where 1D is equal to the reciprocal of 1 meter), and the full field distortion value of the fundus camera imaging system is strictly limited to within 3.5%, avoiding distortion of the acquired fundus image.

[0044] In some other preferred examples, the second quarter wave plate is tilted at an angle of 45°, which helps to reflect the illumination light.

[0045] Furthermore, the entrance pupil diameter of the imaging system of this embodiment is adjusted to 3mm, which matches the diameter of the pupil (2.5mm~4mm), so that the fundus image in a larger range can be observed as much as possible, meeting the requirement of a field of view angle of 50°, and the entrance pupil diameter can capture high-quality fundus images without mydriasis.

[0046] Furthermore, the fundus camera imaging system of this embodiment has good image stability and automatic focusing functions, which can ensure that clear images can be obtained under different ambient light conditions.

[0047] The fundus camera imaging system of the present invention is connected to the mobile terminal by a connecting line, and the mobile terminal is card-mounted in the card-connecting structure, so that the mobile terminal and the fundus camera imaging system form a whole, which is convenient for handheld shooting. The images obtained by the system are clear, and the captured fundus images can be directly uploaded to the mobile terminal, so that medical staff can view the fundus images and their screening results in real time. The operation is simple and fast and can meet the requirements of taking pictures.

[0048] Another aspect of the present disclosure provides a fundus image screening system, comprising: a fundus camera imaging system, a mobile terminal and a connector; wherein a processor is provided on the mobile terminal; when a fundus image of a patient needs to be screened, the mobile terminal is snapped into a snap-in structure of the fundus camera imaging system and connected to the fundus camera imaging system through the connector. wherein the fundus camera imaging system is used to obtain a fundus image to be screened; and the processor is used to compare the fundus image to be screened with a preset fundus image to obtain a screening result of the fundus image.

[0049] It should be noted that the current screening system is not easy to carry, can only screen the patient's fundus in fixed locations, and has low screening efficiency.

[0050] To this end, in this embodiment, the fundus camera imaging system and the mobile terminal can be connected together through a connector to form a whole, which is convenient for handholding and real-time screening results, greatly improving the flexibility and practicality of the screening work, allowing medical personnel to quickly and accurately perform disease screening in different environments, thereby effectively improving the overall diagnostic efficiency.

[0051] It should be noted that the connector may be a data cable, through which the fundus camera imaging system is connected to the mobile terminal, thus simplifying the screening process for diabetic retinopathy.

[0052] It should be further explained that the mobile terminal is a tablet computer or a mobile phone. In some preferred examples, the mobile terminal may preferably be a mobile phone.

[0053] In some preferred examples, the processor further includes an image processing accelerator and a neural network prediction model; wherein the image processing accelerator is used to rotate, crop, and filter the fundus image to be screened so that the fundus image can highlight the characteristics of the lesion area as much as possible. The neural network prediction model is used to predict the processed fundus image to obtain the screening result, that is, the processor can make a preliminary judgment on diabetic retinopathy and obtain the probability of the lesion.

[0054] In other preferred examples, the mobile terminal further includes a storage chip for storing preset fundus photographs and storing screening results of fundus images to be screened.

[0055] Of course, it should be understood that the screening results can be directly fed back to the patient or to the doctor, and the core doctor will give the final preliminary screening opinion based on the screening results to further improve the accuracy of the diagnosis.

[0056] It should be further explained that, in this embodiment, since the mobile terminal is connected to the card connection structure of the fundus camera imaging system, the fundus image situation can be reflected on the screen of the mobile terminal during shooting, and the fundus image position can be moved by clicking the screen to obtain a clearer and standard fundus image.

[0057] The present disclosure provides a fundus camera imaging system and a fundus image screening system, which have the following beneficial effects compared with the prior art:

[0058] First, the fundus camera imaging system disclosed in the present invention is connected to the mobile terminal through a connecting line, which makes the system convenient for handheld shooting, and at the same time enables the fundus images taken to be directly uploaded to the mobile terminal, which is easy and quick to operate. In addition, the user can view the imaging effect of the fundus camera in real time through the screen of the mobile terminal, thereby realizing the convenience of real-time monitoring and operation.

[0059] Second, the present invention can achieve use under non-mydriasis conditions by adjusting the entrance pupil diameter camera and synchronously optimizing the eyepiece objective and the focusing objective as a whole, thereby ensuring the acquisition of clear fundus images.

[0060] Third, the fundus camera imaging system disclosed in the present invention adopts an ergonomic design. By providing a clamping structure at the end of the housing, the system is easy for the operator to hold, reducing hand fatigue and improving operation accuracy.

[0061] Fourth, the present invention combines a fundus camera imaging system with a mobile terminal with a screening function, thereby achieving high standards for equipment portability in the process of photographing fundus diseases, simplifying the fundus disease screening process, and enabling medical personnel to quickly and accurately perform disease screening in different environments, thereby effectively improving the overall diagnostic efficiency, making the screening process more simple and efficient, and realizing telemedicine.

[0062] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A fundus camera imaging system, characterized in that: include: A housing, a communication module, an eyepiece lens, a focusing lens, a first 1 / 4 wave plate, a CMOS sensor, and a clamping structure arranged on the housing; wherein, The eyepiece objective lens, the focusing objective lens, the first 1 / 4 wave plate, the CMOS sensor, and the clamping structure are arranged in sequence along the light beam transmission direction; When the fundus image collected by the fundus camera imaging system needs to be screened, the mobile terminal with the screening function is clamped in the clamping structure and electrically connected to the communication module of the fundus camera imaging system.

2. The fundus camera imaging system according to claim 1, characterized in that: The clamping structure comprises a clamping body and a clamping portion arranged around the clamping body; The clamping body is arranged perpendicular to the light beam transmission direction.

3. The fundus camera imaging system according to claim 2, characterized in that: The clamping portion is provided with a taking-in and putting-out opening.

4. The fundus camera imaging system according to claim 1, characterized in that: The communication module is a WIFI module.

5. The fundus camera imaging system according to claim 4, characterized in that: The housing is also provided with a USB interface.

6. The fundus camera imaging system according to claim 1, characterized in that: The eyepiece objective lens comprises a first lens, a second lens and a third lens, and a second 1 / 4 wave plate is arranged between the first lens and the second lens.

7. The fundus camera imaging system according to claim 6, characterized in that: The second 1 / 4 wave plate is arranged tilted.

8. The fundus camera imaging system according to claim 1, characterized in that: The first 1 / 4 wave plate is arranged vertically along the light beam transmission direction.

9. The fundus camera imaging system according to claim 1, characterized in that: The entrance pupil diameter of the fundus camera imaging system is 3 mm.

10. A fundus image screening system, characterized in that: include: A fundus camera imaging system, a mobile terminal and a connector; wherein the fundus camera imaging system adopts the fundus camera imaging system according to any one of claims 1 to 9, and the mobile terminal is provided with a processor; When the fundus image of the patient needs to be screened, the mobile terminal is snapped into the snap-in structure of the fundus camera imaging system and connected to the fundus camera imaging system through the connector; The fundus camera imaging system is used to obtain the fundus image to be screened; The processor is used to compare the fundus image to be screened with the preset fundus image to obtain a screening result of the fundus image.

Images