Ultra-wide-angle fundus imaging system and imaging equipment

Abstract

The invention provides an ultra-wide-angle fundus imaging system and imaging device.The ultra-wide-angle fundus imaging system and imaging device.The ultra-wide-angle fundus imaging system comprises light source equipment, a light splitting unit, a detector, a first focus scanning mirror, a compensating mirror and a primary mirror; the light source device, the light splitting unit, the first focus scanning mirror, the compensating mirror and the primary mirror are sequentially arranged along the light propagation path, light can reach the pupil from the first focus, and structures such as a rotating mirror and a slow-axis rotating mirror do not need to be arranged. The possibility that a paraxial view field is used due to the fact that a slow-axis reflector shields meridian light rays, and consequently eyeground picture distortion is caused is avoided, the problems of picture distortion and distortion caused by a later algorithm or strict time sequence control are effectively solved, the eyeground imaging effect can be improved, meanwhile, the number of rotating mirrors or galvanometers used is reduced, and the cost is reduced. And the development cost is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fundus imaging, and in particular to an ultra-wide-angle fundus imaging system and an imaging device. Background Art

[0002] In recent years, the imaging technology of ultra-wide-angle fundus cameras has made great progress. For example, fundus large-field imaging, fundus angiography, fundus OCT (Optical Coherence Tomography, hereinafter referred to as OCT, optical coherence tomography), etc. are all developing towards the combination of multiple technologies such as large field of view, ultra-high definition, fluorescence angiography, and OCT.

[0003] Currently, the ultra-wide-angle retinal imaging system can reach 200° or even higher. The rest of the solutions are transmissive solutions, and the field of view angle can reach 180°. However, compared with the reflective solution, the transmissive solution obviously has problems such as blurred images and signal attenuation. The existing reflective solutions have disadvantages such as numerous components and complex assembly, and there is a certain deformation in the final image reconstruction, resulting in poor fundus imaging effects. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an ultra-wide-angle fundus imaging system and an imaging device to improve and solve the technical problems of poor fundus imaging effects and complex deformation in related technologies.

[0005] In a first aspect, an embodiment of the present invention provides an ultra-wide-angle fundus imaging system, which includes: a light source device, a beam splitting unit, a detector, a first focal scanning mirror, a compensating mirror, and a main mirror; wherein, the light source device, the beam splitting unit, the first focal scanning mirror, the compensating mirror, and the main mirror are sequentially arranged along the light propagation path; the light source device is used to generate emitted light, and the light of the emitted light is directed to the beam splitting unit and then to the first focal scanning mirror after passing through the beam splitting unit; the first focal scanning mirror is disposed at the first focal point, and the first focal scanning mirror is used to diverge the light of the emitted light and direct it to the compensating mirror; the compensating mirror is used to modulate the incident light onto the image plane required by the main mirror and propagate it to the main mirror; the main mirror is a parabolic main mirror, which is used to modulate the incident light and converge the modulated light to the second focal point to obtain converged light; the converged light is used to be directed to the target pupil, and after being reflected by the fundus of the target pupil, signal light is obtained; the signal light reaches the beam splitting unit after passing through the main mirror, the compensating mirror, and the first focal scanning mirror, and is separated by the beam splitting unit and directed to the detector, so that the detector performs conversion processing on the signal light to obtain a target signal.

[0006] In combination with the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect. Among them, the above-mentioned ultra-wide-angle fundus imaging system further includes a first reflector; in the light propagation path, the first reflector is disposed between the first focus scanner and the compensating mirror; after the first focus scanner diverges the light rays of the emitted light, the light rays are directed to the first reflector; the first reflector is used to reflect the incident light rays to the compensating mirror.

[0007] In combination with the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect. Among them, the above-mentioned first reflector is one of the following reflectors: a plane mirror, an off-axis paraboloid mirror, a spherical mirror, or an aspherical mirror.

[0008] In combination with the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect. Among them, the above-mentioned compensating mirror is an off-axis paraboloid compensating mirror.

[0009] In combination with the third possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect. Among them, the above-mentioned first focus and the second focus are disposed on the same side of the compensating mirror and the main mirror.

[0010] In combination with the third possible implementation manner of the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect. Among them, the above-mentioned compensating mirror and the main mirror are disposed relatively and reversely eccentrically, and the first focus and the second focus are disposed on both sides of the compensating mirror and the main mirror.

[0011] In combination with the third possible implementation manner of the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect. Among them, the shapes of the above-mentioned compensating mirror and the main mirror match, and the compensating mirror and the main mirror are arranged in a similar centrosymmetric manner.

[0012] In combination with the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect. Among them, the above-mentioned beam splitting unit is a semi-transparent and semi-reflective mirror, or a dichroic mirror.

[0013] In combination with the first aspect, an embodiment of the present invention provides an eighth possible implementation manner of the first aspect. Among them, the above-mentioned first focus scanner is a two-dimensional MEMS galvanometer, or a two-dimensional scanning galvanometer.

[0014] In the second aspect, an embodiment of the present invention further provides an imaging device, and the imaging device is configured with the ultra-wide-angle fundus imaging system described in the first aspect.

[0015] The embodiments of the present invention bring the following beneficial effects: The ultra-wide-angle fundus imaging system and imaging device provided by the embodiments of the present invention include a light source device, a beam splitting unit, a detector, a first focal scanning mirror, a compensating mirror, and a main mirror in the ultra-wide-angle fundus imaging system. Among them, the light source device, the beam splitting unit, the first focal scanning mirror, the compensating mirror, and the main mirror are arranged in sequence along the light propagation path, which can make the light travel from the first focal point to the pupil without setting structures such as a rotating mirror and a slow-axis rotating mirror. Therefore, there is no possibility of distortion of the fundus image caused by using the paraxial field of view due to the slow-axis reflecting mirror blocking the meridional light, effectively alleviating the problems of image distortion and warping caused by subsequent algorithms or strict timing control, helping to improve the imaging effect of the fundus. At the same time, the number of rotating mirrors or galvanometers used is also reduced, further reducing the development cost.

[0016] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the structures specifically pointed out in the specification, the claims, and the drawings.

[0017] To make the above objectives, features, and advantages of the present invention more obvious and understandable, the following specific preferred embodiments are given, and in conjunction with the accompanying drawings, the detailed description is as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a structural block diagram of an ultra-wide-angle fundus imaging system provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the light propagation of an ultra-wide-angle fundus imaging system provided by an embodiment of the present invention; Figure 3 It is a schematic diagram of the light propagation of another ultra-wide-angle fundus imaging system provided by an embodiment of the present invention; Figure 4 It is a schematic diagram of the light propagation of another ultra-wide-angle fundus imaging system provided by an embodiment of the present invention; Figure 5 It is a schematic diagram of the light propagation of another ultra-wide-angle fundus imaging system provided by an embodiment of the present invention.

[0020] Reference numerals: 10 - light source device; 20 - beam splitting unit; 30 - detector; 40 - first focal point scanning mirror; 50 - compensating mirror; 60 - primary mirror; 70 - second focal point; 80 - pupil; 501 - first reflecting mirror. Detailed implementation manners

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Currently, in the ultra-wide-angle fundus imaging technology in the related art, due to limitations in data acquisition and analysis, it has the following defects: (1) Existing reflective solutions have problems such as many components, many lenses, and complex assembly.

[0023] The components mainly involve fast rotating mirrors and other galvanometric mirrors, etc. At least two or more are required to complete the scanning in the sagittal and meridional directions of the fundus. The rotating mirror and other galvanometric mirrors are all core components in the system and are expensive. Moreover, the commonly used reflective ultra-wide-angle on the current market mainly uses long ellipsoidal surfaces and ellipsoidal systems, and their lens apertures are huge, making processing and detection difficult.

[0024] (2) In the existing reflective wide-angle fundus camera, due to the addition of a double galvanometric mirror scanning system, there are too many rotation nodes in the optical path, making the installation and debugging complex.

[0025] Based on this, an ultra-wide-angle fundus imaging system and imaging device provided by the embodiments of the present invention can be designed with two paraboloids. The optical configuration is completely different from that of the existing technology, making the structure simpler and achieving a better imaging effect.

[0026] To facilitate the understanding of this embodiment, first, a detailed introduction to an ultra-wide-angle fundus imaging system disclosed by the embodiments of the present invention will be given.

[0027] In a possible implementation manner, the embodiments of the present invention provide an ultra-wide-angle fundus imaging system.

[0028] Specifically, Figure 1 shows a structural block diagram of an ultra-wide-angle fundus imaging system. As Figure 1 shown, the ultra-wide-angle fundus imaging system provided by the embodiments of the present invention includes: a light source device 10, a beam splitting unit 20, a detector 30, a first focal point scanning mirror 40, a compensating mirror 50, and a primary mirror 60.

[0029] Among them, the above light source device 10, beam splitting unit 20, first focal scanning mirror 40, compensating mirror 50 and primary mirror 60 are arranged in sequence along the light propagation path, and the first focal scanning mirror 40, compensating mirror 50 and primary mirror 60 constitute the light propagation system of the ultra-wide-angle fundus imaging system.

[0030] Specifically, the light source device 10 in the embodiment of the present invention is used to generate emitted light, and the light rays of the emitted light are directed to the beam splitting unit 20 and then to the first focal scanning mirror after passing through the beam splitting unit.

[0031] In actual use, the light source device in the embodiment of the present invention refers to a laser device, which may include one laser or a combination of multiple lasers. Moreover, the wavelength of the light rays emitted by the light source device in the embodiment of the present invention is usually between 400 nm and 1700 nm, and the diameter of the light beam is between 0.5 mm and 8 mm, which can effectively meet the light requirements for ultra-wide-angle fundus imaging.

[0032] Furthermore, the above first focal scanning mirror 40 is disposed at the first focal point, and the first focal scanning mirror 40 is used to diverge the light rays of the emitted light and direct them to the compensating mirror 50.

[0033] The compensating mirror 50 is used to modulate the incident light rays onto the image plane required by the primary mirror 60 and propagate them to the primary mirror 60.

[0034] The primary mirror 60 is a parabolic primary mirror, which is used to modulate the incident light rays and converge the modulated light rays to the second focal point to obtain converging light.

[0035] Furthermore, the converging light in the embodiment of the present invention is used to be directed to the target pupil, such as Figure 1 the pupil shown by the dotted line. After being reflected by the fundus of the target pupil, signal light is obtained; the signal light passes through the above primary mirror 60, compensating mirror 50, and first focal scanning mirror 40, then reaches the beam splitting unit 20, and is separated by the beam splitting unit 20 and directed to the detector 30, so that the detector 30 performs conversion processing on the signal light to obtain the target signal.

[0036] In actual use, the above detector in the embodiment of the present invention is actually a photoelectric converter. Usually, the detector in the embodiment of the present invention can be a photomultiplier tube PMT detector, an avalanche photodiode APD detector, or a photodiode PD detector, or a balanced detector, etc. It mainly performs photoelectric conversion and digital signal conversion on the returned signal light, and finally transmits the signal back to the processor through devices such as a data acquisition card for subsequent processing.

[0037] The specific implementation manner of the detector can be set according to the actual use situation, and the embodiment of the present invention does not limit this.

[0038] Further, the beam splitting unit in the embodiment of the present invention is a semi-transmissive and semi-reflective mirror, or a dichroic mirror, which is used to separate the signal light and the emission light returned from the pupil (fundus).

[0039] Further, the first focal point scanning mirror in the embodiment of the present invention is a two-dimensional MEMS (Micro-Electro-Mechanical System mirror) galvanometer, or a two-dimensional scanning galvanometer. Moreover, the position of the first focal point scanning mirror is the first focal point. In the embodiment of the present invention, the method of arranging a two-dimensional MEMS galvanometer, or a two-dimensional scanning galvanometer at the first focal point can be different from the polygon rotating mirror in the related art. By arranging a two-dimensional MEMS galvanometer, or a two-dimensional scanning galvanometer at the first focal point, the light rays in different fields of view can be converged and finally projected onto the pupil. In addition, by combining lasers with different wavelengths, illumination stimulation of the fundus can be achieved.

[0040] Moreover, in order to enable the first focal point scanning mirror to diverge the light rays, generally, the first focal point scanning mirror can be configured to rotate at a preset angle, so that the incident parallel emission light diverges at a preset angle and is projected onto the compensating mirror.

[0041] Specifically, for the sake of easy understanding, based on Figure 1 , Figure 2 shows a schematic diagram of the light propagation of an ultra-wide-angle fundus imaging system. As Figure 2 shown, Figure 2 shows the light source device 10, the beam splitting unit 20, the detector 30, the first focal point scanning mirror 40, the compensating mirror 50, the main mirror 60, and the second focal point 70.

[0042] Based on Figure 2 it can be seen that the first focal point scanning mirror 40, the compensating mirror 50, and the main mirror 60 constitute the light propagation system of the ultra-wide-angle fundus imaging system. Moreover, under the action of the first focal point scanning mirror 40, the emission light diverges at a preset angle and is projected onto the compensating mirror.

[0043] In actual use, the ultra-wide-angle fundus imaging system in the embodiment of the present invention can be applied to an imaging device. Therefore, in the imaging device, a support structure for each setting can be provided, so that the first focal point scanning mirror 40, the compensating mirror 50, and the main mirror 60 constitute the light propagation system shown in Figure 2 . Figure 2

[0044] Moreover, Figure 2 in, based on the function of the beam splitting unit, the positions of the light source device 10 and the detector 30 can be interchanged, that is, the positions of the light source device 10 and the detector 30 can be set according to the actual function of the beam splitting unit. The embodiment of the present invention does not limit this. ​

[0045] In addition, based on Figure 2 It can be seen that the above-mentioned first focal scanning mirror 40, compensating mirror 50, and primary mirror 60 all have a reflecting function, thereby enabling the incident light to propagate in the light propagation system.

[0046] Furthermore, the ultra-wide-angle fundus imaging system in the embodiment of the present invention further includes a first reflecting mirror; in the above-mentioned light propagation path, the first reflecting mirror is disposed between the first focal scanning mirror and the compensating mirror; after the first focal scanning mirror diverges the light of the emitted light, it is directed towards the first reflecting mirror; the first reflecting mirror is used to reflect the incident light to the compensating mirror.

[0047] Specifically, for the sake of convenience of description, on the basis of Figure 2 a schematic diagram of the light propagation of another ultra-wide-angle fundus imaging system is further shown. In addition to the structure shown in Figure 3 it further includes a first reflecting mirror 501, as well as a second focal point 70 and a pupil 80. Figure 2 In the structure shown in Figure 3 it further includes a first reflecting mirror 501, as well as a second focal point 70 and a pupil 80.

[0048] Specifically, Figure 3 in it, the compensating mirror 50 is an off-axis parabolic compensating mirror, which is used to modulate the light reflected by the first reflecting mirror 501 onto the image plane required by the above-mentioned primary mirror 60, and then the primary mirror 60 converges the light to the second focal point.

[0049] Furthermore, the above-mentioned Figure 2 the first reflecting mirror is one of the following reflecting mirrors: a plane reflecting mirror, an off-axis parabolic mirror, a spherical mirror, or an aspherical mirror, where the aspherical mirror can be an ellipsoidal surface, a bi-conical surface, a hyperbolic surface, a free-form surface, etc.

[0050] Specifically, if the first reflecting mirror is a plane reflecting mirror, then the first reflecting mirror can shorten the working distance so as to leave enough working space for the person being photographed during work. At this time, the entire ultra-wide-angle fundus imaging system does not include the first reflecting mirror.

[0051] And since the above-mentioned compensating mirror 50 is usually an off-axis parabolic compensating mirror, at this time, the entire ultra-wide-angle fundus imaging system is a double-parabolic system, that is, it includes two parabolic mirrors, namely the primary mirror and the compensating mirror.

[0052] Furthermore, if Figure 2 the first reflecting mirror 501 in it is a spherical mirror or an aspherical mirror, then the entire ultra-wide-angle fundus imaging system is converted into a three-aspherical system, that is, it includes the primary mirror, the compensating mirror, and the first reflecting mirror. Setting the first reflecting mirror as an aspherical mirror is more beneficial to the correction of fundus aberration compared with the embodiment of the plane reflecting mirror.

[0053] The specific implementation of the first mirror can be set according to the actual usage, and the embodiments of the present invention do not limit this.

[0054] Furthermore, the above-mentioned compensating mirror 50 can be a hyperboloid mirror in addition to an off-axis paraboloid compensating mirror. The main purpose is to modulate the light beam incident parallel to this compensating mirror to an intermediate image plane that can adapt to the main mirror 60, and then converge the parallel light to the pupil at the second focus through the paraboloid of the main mirror 60.

[0055] Furthermore, the above Figure 2 and Figure 3 In, the first focus and the second focus are arranged on the same side of the compensating mirror 50 and the main mirror 60. That is, the above-mentioned first focus scanning mirror 40 and the second focus 70 are arranged on the same side, and are on the same side as the position of the pupil 80.

[0056] And, in Figure 2 In the shown implementation, the first mirror 501 is reduced. At this time, the ultra-wide-angle fundus imaging system is an aspherical system, that is, it has fewer structures.

[0057] When actually in use, considering Figure 2 and 3 In the shown implementation, when the first focus and the second focus are arranged on the same side, it will cause devices such as the light source device 10, the beam splitting unit 20, the detector 30, and the first focus scanning mirror 40 to be on the same side as the person to be photographed, that is, on the same side as the position of the pupil 80 at the second focus position, which will result in a smaller working space left for the person to be photographed. Therefore, in the embodiments of the present invention, the above-mentioned compensating mirror and the main mirror can also be relatively reversely eccentrically arranged. At this time, the first focus and the second focus are arranged on both sides of the compensating mirror and the main mirror.

[0058] For the convenience of understanding, Figure 4 shows a schematic diagram of the light propagation of another ultra-wide-angle fundus imaging system. Among them, Figure 4 shows that the compensating mirror 50 and the main mirror 60 are relatively reversely eccentrically arranged. In this implementation, the laser beam emitted by the above-mentioned light source device 10 and the second focus at the pupil position are arranged on both sides of the compensating mirror and the main mirror, which is more convenient for diagnosis and treatment and the overall design of the instrument.

[0059] Among them, the above-mentioned reverse eccentric arrangement means that the working surfaces of the compensating mirror 50 and the main mirror 60 are symmetrically arranged with respect to the center of the entire ultra-wide-angle fundus imaging system.

[0060] Furthermore, in the embodiments of the present invention, the above-mentioned compensating mirror 50 and the main mirror 60 are shape-matched, and the compensating mirror and the main mirror are arranged in a similar central symmetry.

[0061] Among them, in the embodiments of the present invention, the shape matching between the compensation mirror 50 and the main mirror 60 means that the radius curvatures of the compensation mirror 50 and the main mirror 60 are relatively consistent, making the shape of the compensation mirror 50 closer to that of the main mirror 60. At this time, the compensation mirror 50 and the main mirror 60 can form a structure similar to central symmetry. For the sake of easy understanding, based on Figure 4 , Figure 5 FIG. shows a schematic diagram of the light propagation of another ultra-wide-angle fundus imaging system. It can be seen from Figure 5 that the above-mentioned compensation mirror 50 and the main mirror 60 are close in shape, and the compensation mirror and the main mirror are arranged in a structure similar to central symmetry. This structure can better control the density of different fields of view in the meridian plane.

[0062] Moreover, in the embodiments of the present invention, the structure of the above-mentioned light propagation system is based on the principle that a paraboloid or a hyperboloid has a focus. Through the double paraboloid compensation scheme, it can achieve direct two-dimensional scanning imaging from the first focus (the position of the two-dimensional MEMS galvanometer or the two-dimensional scanning galvanometer) to the pupil position of the second focus, without an intermediate image point, reducing the complexity of assembly. And by using two paraboloid mirrors, the processing technology is simpler than that of traditional convex spherical mirrors, reducing costs.

[0063] In summary, the ultra-wide-angle fundus imaging system provided by the embodiments of the present invention has the following beneficial effects: (1) Reducing the number of galvanometers used: That is, two paraboloid mirrors can be used. By placing a two-dimensional MEMS galvanometer or a two-dimensional scanning galvanometer at the first focus, scanning in two directions of the eye can be achieved, and the number of rotating mirrors or galvanometers used can be reduced.

[0064] (2) Reducing the development difficulty: Compared with controlling a rotating mirror and a slow-axis rotating mirror, in the embodiments of the present invention, only one traditional two-dimensional MEMS galvanometer or a two-dimensional scanning galvanometer is needed, further improving the integration of the entire ultra-wide-angle fundus imaging system.

[0065] (3) Reducing the bending deformation of the image plane: In a traditional reflection system, the slow-axis rotating mirror needs to deflect the light incident on the slow-axis mirror in the Y direction to add a rotation axis to the slow-axis mirror. In this process, the fundus scanning image loses symmetry, and post-processing of the image or strict timing control of the control is required to obtain an undistorted image. In the embodiments of the present invention, directly from the first focus to the pupil of the second focus of the human eye, there is no risk of tilting and distorting the fundus image due to deflecting the slow-axis reflecting mirror, effectively alleviating the problems of image distortion and distortion caused by subsequent algorithms or strict timing control.

[0066] Furthermore, based on the above embodiments, an imaging device is further provided in an embodiment of the present invention. The imaging device is configured with the above-mentioned ultra-wide-angle fundus imaging system.

[0067] Specifically, the imaging device in the embodiment of the present invention may be an ultra-wide-angle fundus imaging camera, or an ultra-wide-angle fundus imaging instrument, etc., which is subject to the actual usage situation, and the embodiment of the present invention does not limit this.

[0068] The imaging device provided in the embodiment of the present invention has the same technical features as the ultra-wide-angle fundus imaging system provided in the above embodiment, so it can also solve the same technical problems and achieve the same technical effects.

[0069] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the imaging device described above can refer to the corresponding process in the foregoing embodiments, and will not be elaborated herein.

[0070] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0071] If the above function is implemented in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The foregoing storage medium includes: USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical disks, etc., which can store program codes.

[0072] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0073] Finally, it should be noted that the above embodiments are only specific embodiments of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit it. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions recorded in the foregoing embodiments or can easily conceive of changes, or perform equivalent replacements for some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An ultra-wide-angle fundus imaging system, characterized in that: The ultra-wide-angle fundus imaging system comprises: a light source device, a light splitting unit, a detector, a first focus scanning mirror, a compensation mirror and a main mirror; Wherein, the light source device, the light splitting unit, the first focus scanning mirror, the compensation mirror and the main mirror are sequentially arranged along the light propagation path; The light source device is used to generate emission light, and the emission light is emitted to the light splitting unit, and then emitted to the first focus scanning mirror through the light splitting unit; The first focus scanning mirror is arranged at the first focus, and the first focus scanning mirror is used to diverge the emitted light and emit it toward the compensation mirror; The compensating mirror is used to modulate the captured light onto the image plane required by the primary mirror and transmit it to the primary mirror; The primary mirror is a parabolic primary mirror, which is used to modulate the incident light and converge the modulated light to a second focus to obtain converged light; The converged light is used to irradiate the target pupil, and the signal light is obtained after being reflected by the fundus of the target pupil; The signal light reaches the spectroscopic unit after passing through the main mirror, the compensation mirror, and the first focus scanning mirror, and is separated by the spectroscopic unit and directed to the detector, so that the detector converts and processes the signal light to obtain a target signal.

2. The ultra-wide-angle fundus imaging system according to claim 1, characterized in that: The ultra-wide-angle fundus imaging system also includes a first reflecting mirror; In the light propagation path, the first reflector is arranged between the first focus scanning mirror and the compensation mirror; The first focus scanning mirror diverges the emitted light and then emits it toward the first reflecting mirror; The first reflector is used to reflect the incoming light to the compensation mirror.

3. The ultra-wide-angle fundus imaging system according to claim 2, characterized in that: The first reflector is one of the following reflectors: a plane reflector, an off-axis parabolic mirror, a spherical mirror, or an aspherical mirror.

4. The ultra-wide-angle fundus imaging system according to claim 1, characterized in that: The compensating mirror is an off-axis parabolic compensating mirror.

5. The ultra-wide-angle fundus imaging system according to claim 4, characterized in that: The first focal point and the second focal point are arranged on the same side of the compensation mirror and the primary mirror.

6. The ultra-wide-angle fundus imaging system according to claim 4, characterized in that: The compensation mirror and the main mirror are arranged eccentrically in opposite directions, and the first focus and the second focus are arranged on both sides of the compensation mirror and the main mirror.

7. The ultra-wide-angle fundus imaging system according to claim 4, characterized in that: The shapes of the compensation mirror and the main mirror match, and the compensation mirror and the main mirror are arranged in a similar central symmetry.

8. The ultra-wide-angle fundus imaging system according to claim 1, characterized in that: The light splitting unit is a semi-transparent and semi-reflective mirror, or a dichroic mirror.

9. The ultra-wide-angle fundus imaging system according to claim 1, characterized in that: The first focal scanning mirror is a two-dimensional MEMS galvanometer mirror, or a two-dimensional scanning galvanometer mirror.

10. An imaging device, characterized in that: The imaging device is equipped with the ultra-wide-angle fundus imaging system according to any one of claims 1 to 9.

Images