Fundus imaging apparatus

Abstract

The invention provides fundus imaging equipment, and relates to the technical field of medical instruments, and the fundus imaging equipment provided by the invention comprises a movement mechanism, an eyepiece and a fundus imaging unit; the optical axis of the eyepiece inclines upwards by a preset angle relative to the horizontal plane; the movement mechanism is used for driving the eyepiece to move relative to the detected eye; the fundus imaging unit is used for carrying out fundus imaging on the examined eye, and the imaging optical axis of the fundus imaging unit coincides with the optical axis of the eyepiece. The fundus imaging equipment provided by the invention has the advantages of enlarging the applicable crowd of products, being clear in imaging, reducing the production and maintenance cost of instruments and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a fundus imaging device. Background Art

[0002] The size of the fundus image shooting range is the core indicator of the clinical evaluation of fundus cameras. The larger the fundus image captured, the larger the eyepiece size required, and the larger the eyepiece size, the smaller the corresponding working distance. However, the working distance and the size of the fundus image range are in a contradictory relationship. When the working distance is small to a certain value, the eyepiece lens will touch the patient's brow bone.

[0003] like Figure 1 and Figure 2 As shown in the figure, when the eyepiece lens is tilted upward within a certain range, the working distance can be further reduced on the basis of the limit working distance, so that the captured fundus image can be larger. Therefore, in order to obtain a larger fundus image range, some fundus camera manufacturers design the optical part of the product to have a freely adjustable tilt angle. Users can freely adjust the angle of the optical part according to shooting needs, thereby solving the contradiction between the working distance and the fundus image range within a certain range. However, since the product has an additional degree of adjustment freedom, the user's operation will become more complicated and the alignment will be more difficult. At the same time, a rotating shaft is added to the instrument, which increases the production and maintenance costs of the instrument and the failure rate. Summary of the invention

[0004] The object of the present invention is to provide a fundus imaging device and an ophthalmic instrument, which have the advantages of increasing the applicable population of the product, clear imaging, and reducing the production and maintenance costs of the instrument.

[0005] To achieve the above object, the present invention provides the following technical solutions: The present invention provides a fundus imaging device, comprising a motion mechanism, an eyepiece and a fundus imaging unit; The optical axis of the eyepiece is tilted upward at a preset angle relative to a horizontal plane, and the motion mechanism is used to drive the eyepiece to move relative to the eye to be examined; The fundus imaging unit is used to perform fundus imaging on the eye to be inspected, and the imaging optical axis of the fundus imaging unit coincides with the optical axis of the eyepiece.

[0006] Furthermore, when the motion mechanism drives the eyepiece to move along the extending direction of the eyepiece optical axis, the fundus imaging unit follows the eyepiece to move along the extending direction of the eyepiece optical axis.

[0007] Furthermore, it also includes a detection component and a control component, the detection component is connected to the motion mechanism, the detection component is used to obtain displacement change information of the motion mechanism when it moves horizontally forward and backward relative to the eye of the subject and convert it into a first electrical signal, the motion mechanism and the detection component are both electrically connected to the control component, and the control component is used to control the motion mechanism to drive the eyepiece and the fundus imaging unit to move together in the vertical direction according to the first electrical signal.

[0008] Furthermore, the motion mechanism includes a first motion platform, the first motion platform includes a sliding shaft for realizing the front and rear horizontal movement of the eyepiece relative to the eye to be inspected, and the detection component is connected to the sliding shaft.

[0009] Furthermore, the detection assembly includes a support seat, a grating ruler, a sliding seat and a reading head; The sliding shaft is connected to the sliding seat, the sliding seat is slidably matched with the supporting seat, and the sliding direction is parallel to the direction in which the sliding shaft drives the eyepiece to move relative to the eye to be inspected; The grating ruler is installed on the support seat, and the extension direction of the grating ruler is parallel to the sliding direction of the sliding seat; The reading head is installed on the sliding seat and is electrically connected to the control component. The reading head is used to obtain the displacement change information and convert it into a first electrical signal.

[0010] Furthermore, when the sliding shaft drives the eyepiece to move horizontally back and forth relative to the eye under examination and has rotational freedom relative to the support seat, the sliding seat and the sliding shaft are rotationally connected via a bearing.

[0011] Furthermore, the motion mechanism also includes a lifting unit for driving the eyepiece to rise and fall, the lifting unit is electrically connected to the control component, and the control component is used to control the lifting and falling of the lifting unit according to the first electrical signal.

[0012] Furthermore, the lifting unit includes a rotating assembly, a rotating collection assembly, a driving mechanism and a lifting platform; The rotating component is in transmission connection with the rotating collection component, and the rotating collection component is used to receive parameter information of the rotating component during the rotating process and convert it into a second electrical signal; The driving mechanism is in transmission connection with the lifting platform, the driving mechanism is used to drive the lifting platform to move in a vertical direction, and the eyepiece is connected to the lifting platform; The rotating collection component and the driving mechanism are both electrically connected to the control component, and the control component is used to control the action of the driving mechanism according to the first electrical signal and the second electrical signal.

[0013] Furthermore, the motion mechanism also includes a second motion platform connected between the first motion platform and the lifting unit, and the second motion platform is used to drive the lifting unit to move horizontally left and right relative to the eye to be inspected.

[0014] Furthermore, the optical axis of the eyepiece is inclined upward by 5-15° relative to the horizontal plane.

[0015] The fundus imaging device provided by the present invention can produce the following beneficial effects: Compared with the prior art, in the fundus imaging device provided by the present invention, firstly, the optical axis of the eyepiece is tilted upward at a preset angle relative to the horizontal plane, so that the range of the captured fundus image becomes larger, while reducing the possibility and risk of the eyepiece lens hitting the patient's brow bone, thereby increasing the number of people suitable for the product; secondly, the optical axis of the eyepiece is tilted upward at a fixed preset angle relative to the horizontal plane, which can reduce the production and maintenance costs of the instrument; finally, the imaging optical axis of the fundus imaging unit coincides with the optical axis of the eyepiece, so that the fundus imaging unit can capture fundus imaging pictures with clearer imaging pictures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a schematic diagram of the eyepiece relative to the eye under examination when the optical axis of the eyepiece is parallel to the horizontal plane; Figure 2 is a schematic diagram of the eyepiece relative to the eye to be examined when the optical axis of the eyepiece has an angle with the horizontal plane; Figure 3 A side view of a fundus imaging device provided by an embodiment of the present invention; Figure 4 A schematic diagram of a partial three-dimensional structure of a fundus imaging device provided by an embodiment of the present invention; Figure 5 for Figure 4 A local enlarged schematic diagram of point A; Figure 6 A partial side view of a fundus imaging device provided by an embodiment of the present invention; Figure 7 for Figure 6 BB cross-section diagram; Figure 8 for Figure 7 A partial enlarged schematic diagram of point C.

[0018] Icons: 1-detection component; 11-support seat; 12-grating ruler; 13-sliding seat; 131-slider; 132-mounting block; 14-reading head; 15-bearing; 2-motion mechanism; 21-first motion platform; 211-sliding shaft; 212-main base plate; 213-rack groove; 22-lifting unit; 221-rotating component; 222-rotating acquisition component; 223-driving mechanism; 224-lifting platform; 23-second motion platform; 3-eyepiece. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0023] This embodiment provides a fundus imaging device, such as Figures 3 to 5 As shown, it includes a motion mechanism 2, an eyepiece 3 and a fundus imaging unit; The optical axis of the eyepiece 3 is tilted upward at a preset angle relative to the horizontal plane, and the motion mechanism 2 is used to drive the eyepiece 3 to move relative to the eye to be examined; The fundus imaging unit is used to perform fundus imaging on the eye to be inspected, and the imaging optical axis of the fundus imaging unit coincides with the optical axis of the eyepiece.

[0024] In the above fundus imaging device, the user can drive the eyepiece 3 to move relative to the eye to be examined through the motion mechanism 2, align the eyepiece 3 with the center of the patient's pupil so that the patient's pupil is within the working distance, and the fundus imaging unit performs fundus imaging.

[0025] The fundus imaging device provided by the above embodiment has the following advantages: 1. If Figure 3 As shown, the optical axis of the eyepiece 3 is tilted upward relative to the horizontal plane, so that the range of the fundus image captured becomes larger, while reducing the possibility and risk of the eyepiece 3 lens hitting the patient's brow bone, and increasing the number of people applicable to the product; 2. During use, the optical axis of the eyepiece 3 is tilted upward at a fixed preset angle relative to the horizontal plane, and there is no need to add an additional rotating shaft or a locking structure to lock the angle of the eyepiece 3 on the instrument, which can reduce the complexity of user operation and the production and maintenance costs of the instrument; 3. The imaging optical axis of the fundus imaging unit coincides with the optical axis of the eyepiece, so that the fundus imaging unit can obtain clearer fundus imaging images.

[0026] Specifically, when the motion mechanism 2 drives the eyepiece 3 to move along the extension direction of the optical axis of the eyepiece 3, the fundus imaging unit follows the eyepiece 3 to move along the extension direction of the optical axis of the eyepiece 3 to ensure the stability and clarity of the imaging of the fundus imaging unit.

[0027] In an optional embodiment, the fundus imaging device also includes a detection component 1 and a control component. The detection component 1 is connected to the motion mechanism 2. The detection component 1 is used to obtain displacement change information of the motion mechanism 2 when it moves horizontally forward and backward relative to the eye of the subject and convert it into a first electrical signal. The motion mechanism 2 and the detection component 1 are both electrically connected to the control component. The control component is used to control the motion mechanism 2 to drive the eyepiece 3 and the fundus imaging unit to move in the vertical direction together according to the first electrical signal.

[0028] During use, after the user aligns the eyepiece 3 with the patient's pupil center, the motion mechanism 2 can be used to drive the eyepiece 3 to move horizontally forward toward the eye to be examined, so that the patient's pupil is gradually within the working distance. Since the optical axis of the eyepiece 3 is tilted upward at a preset angle relative to the horizontal plane, in the above process, the detection component 1 obtains the displacement change information of the motion mechanism 2 when it moves forward horizontally and converts it into a first electrical signal. The control component controls the motion mechanism 2 to drive the eyepiece 3 to move upward in the vertical direction according to the first electrical signal, so that the eyepiece 3 moves horizontally forward and automatically moves upward according to the forward distance, keeping the optical axis of the eyepiece 3 always coaxial with the pupil center of the patient's eye to be examined.

[0029] The above-mentioned setting ensures that when the moving mechanism 2 moves horizontally forward and backward relative to the eye of the subject, the device will automatically compensate in the vertical direction according to the distance of the forward and backward movement, ensuring that the optical axis of the eyepiece 3 and the imaging optical axis of the fundus imaging unit are always coaxial with the center of the pupil, reducing the difficulty of alignment during user operation and making user operation easier.

[0030] In an optional embodiment, if Figure 4 As shown, the motion mechanism 2 includes a first motion platform 21 , and the first motion platform 21 includes a sliding shaft 211 for realizing the horizontal forward and backward movement of the eyepiece 3 relative to the eye under examination, and the detection component 1 is connected to the sliding shaft 211 .

[0031] In the above embodiment, since the sliding shaft 211 can realize the horizontal movement of the eyepiece 3 relative to the eye of the subject, the displacement change information of the horizontal movement of the sliding shaft 211 relative to the eye of the subject can be replaced by detecting the displacement change information of the horizontal movement of the eyepiece 3 relative to the eye of the subject, which is more convenient for the setting of the detection component 1.

[0032] For ease of understanding, the direction of horizontal movement back and forth relative to the eye to be examined is set as the X direction, the direction of horizontal movement left and right relative to the eye to be examined is set as the Y direction, and the vertical direction is set as the Z direction. In the following text, X, Y and Z directions are used to replace the description of the above directions.

[0033] In an optional embodiment, if Figures 4 to 6 As shown, the detection assembly 1 includes a support seat 11, a grating ruler 12, a sliding seat 13 and a reading head 14, wherein: The sliding shaft 211 is connected to the sliding seat 13, and the sliding seat 13 is slidably matched with the support seat 11, and the sliding direction is parallel to the direction in which the sliding shaft 211 drives the eyepiece 3 to move relative to the eye to be inspected, so that when the sliding shaft 211 moves along the X direction, it can synchronously drive the sliding seat 13 to slide relative to the support seat 11 along the X direction; The grating ruler 12 is installed on the support seat 11, and the extension direction of the grating ruler 12 is parallel to the sliding direction of the sliding seat 13; The reading head 14 is mounted on the sliding seat 13 and is electrically connected to the control assembly.

[0034] When in use, the sliding shaft 211 drives the eyepiece 3 to move along the X direction, and the eyepiece 3 gradually approaches the eye to be inspected. At the same time, the sliding shaft 211 drives the sliding seat 13 to slide along the X direction relative to the support seat 11. Since the grating ruler 12 is installed on the support seat 11, the reading head 14 can obtain the displacement change information of the sliding shaft 211 and convert it into a first electrical signal. The control component controls the motion mechanism 2 according to the first electrical signal to drive the eyepiece 3 to move in the vertical direction, along the extension direction of the optical axis of the eyepiece 3, to compensate for the height difference in the Z direction when the eyepiece 3 moves along the X direction.

[0035] Among them, the reading head 14 is an absolute reading head.

[0036] In an optional embodiment, when the sliding shaft 211 drives the eyepiece 3 to move horizontally back and forth relative to the eye under examination, if the sliding shaft 211 does not rotate relative to the supporting seat 11, the sliding seat 13 and the sliding shaft 211 can be fixedly connected.

[0037] In other embodiments, when the sliding shaft 211 drives the eyepiece 3 to move horizontally back and forth relative to the eye under examination, and at the same time has a rotational freedom relative to the support base 11, as shown in FIG. Figure 7 and Figure 8 As shown, the sliding seat 13 and the sliding shaft 211 are rotatably connected via a bearing 15 .

[0038] The above embodiment can prevent the sliding seat 13 from rotating relative to the support seat 11 when the sliding shaft 211 rotates relative to the support seat 11 , thereby ensuring that the sliding seat 13 slides stably relative to the support seat 11 .

[0039] One of the sliding seat 13 and the supporting seat 11 may be provided with a sliding block, and the other may be provided with a sliding rail that slidably cooperates with the sliding block, thereby achieving sliding cooperation between the two.

[0040] In an optional embodiment, if Figure 5 As shown, the sliding seat 13 includes a slider 131 and a mounting block 132 fixed to the slider 131 by screws and other connecting parts. The slider 131 slides with the slide rail on the support seat 11, and the reading head 14 is installed on the mounting block 132, and the mounting block 132 is connected to the sliding shaft 211.

[0041] The sliding seat 13 has a simple structure and adopts a split structure, which is convenient for the installation of the reading head 14 and the sliding connection between the sliding seat 13 and the supporting seat 11.

[0042] Specifically, the first motion platform 21 can adopt the following structure, for example: Figure 4 As shown, the first motion platform 21 includes a main base plate 212, a rack groove 213 and a fourth gear; the rack groove 213 is connected to the main base plate 212, the fourth gear is connected to both ends of the sliding shaft 211, the sliding shaft 211 is transmission-connected to the rack groove 213 through the fourth gear, the extension direction of the rack groove 213 is perpendicular to the axial direction of the sliding shaft 211, and the sliding shaft 211 reciprocates along the extension direction of the rack groove 213 through the fourth gear.

[0043] In an optional embodiment, if Figure 5 As shown, in order to make the structure of the fundus imaging device more compact, the support seat 11 is buckled above the rack groove 213, and the relative surface shapes of the two are adapted, and the support seat 11 is connected to the main base plate 212 by connecting parts such as screws.

[0044] In an optional embodiment, if Figure 6 As shown, the motion mechanism 2 further includes a lifting unit 22 for driving the eyepiece 3 to move up and down, and the lifting unit 22 is electrically connected to the control component.

[0045] When in use, when the sliding shaft 211 drives the eyepiece 3 to move horizontally forward and backward relative to the eye of the subject, the reading head 14 obtains the displacement change information of the sliding shaft 211 and converts it into a first electrical signal. The control component can control the lifting and lowering of the lifting unit 22 according to the first electrical signal, thereby realizing automatic compensation of the eyepiece 3 in the Z direction. Compared with manually moving the eyepiece 3 upward, it can effectively reduce the user's alignment difficulty.

[0046] In an optional embodiment, if Figure 4 and Figure 6 As shown, the lifting unit 22 includes a rotating component 221, a rotating collection component 222, a driving mechanism 223 and a lifting platform 224; the rotating component 221 is connected to the rotating collection component 222 in a transmission connection, and the rotating collection component 222 is used to receive parameter information of the rotation process of the rotating component 221 and convert it into a second electrical signal; the driving mechanism 223 is connected to the lifting platform 224 in a transmission connection, and the driving mechanism 223 is used to drive the lifting platform 224 to move in a vertical direction; the rotating collection component 222 and the driving mechanism 223 are both electrically connected to the control component, and the control component is used to control the action of the driving mechanism 223 according to the first electrical signal and the second electrical signal.

[0047] In the above embodiment, on the one hand, the driving mechanism 223 is used to drive the lifting platform 224 to move up and down in the vertical direction. The doctor only needs to use a small force to rotate the rotating component 221, which reduces the doctor's operating difficulty, ensures the stability during the lifting process, and can also improve the real-time and follow-up performance of the lifting movement, while reducing the doctor's force when operating the handle and ensuring the doctor's operating experience.

[0048] On the other hand, the control component can control the action of the driving mechanism 223 according to the first electrical signal and the second electrical signal. For example, if the user pushes the sliding shaft 211 forward by a distance X1, the corresponding eyepiece 3 needs to move up by a distance Z1, and at the same time the user manually adjusts the distance upward to Z2, then the control component controls the driving mechanism 223 to drive the lifting platform 224 to move up by a distance Z1+Z2; if the user pushes the sliding shaft 211 forward by a distance X1, the corresponding eyepiece 3 needs to move up by a distance Z1, and at the same time the user manually adjusts the distance downward to Z2, then the control component controls the driving mechanism 223 to drive the lifting platform 224 to move up by a distance Z1-Z2.

[0049] The control component can perform superposition operation on the two electrical signals and then send the calculated parameter command to drive the driving mechanism 223 to operate, thereby realizing height compensation and lifting movement of the eyepiece 3 in the vertical direction, which is more convenient for users to operate.

[0050] Among them, the control component can be of various types, such as MCU (Micro Controller Unit, single-chip microcomputer), control chip or PLC controller, etc.; preferably, the control component can be MCU; preferably, the control component can adopt STM32F103C8T6 single-chip microcomputer, which will not be repeated here.

[0051] In addition, the rotating component 221, the rotating collection component 222, the driving mechanism 223 and the lifting platform 224 can all adopt the following structure, for example, the rotating component 221 includes a rotating handle and a first gear connected to the rotating handle; the rotating collection component 222 includes an encoder and a fifth gear, the first gear and the fifth gear are meshed for transmission, and the fifth gear can drive the main shaft of the encoder to rotate, thereby generating a pulse signal, that is, collecting the parameter information of the rotating handle in real time; the driving mechanism may include a driving motor, a second gear, a third gear, a lead screw and a lead screw nut, the output shaft of the driving motor is connected to the second gear, the lead screw is connected to the third gear, the second gear is meshed with the third gear, the lead screw nut is fixedly connected to the lifting platform 224, and the lead screw nut is threadedly connected to the lead screw, the driving motor drives the lead screw to rotate through the second gear and the third gear, so as to drive the lifting platform to reciprocate along the axial direction of the lead screw through the lead screw nut.

[0052] Based on the above embodiments, the eyepiece 3 and the fundus imaging unit can be directly mounted on the lifting platform 224, or connected to the lifting platform 224 through other structures, so that the lifting platform 224 can drive the eyepiece 3 and the fundus imaging unit to rise and fall.

[0053] In an optional embodiment, in order to further reduce the probability of the eyepiece 3 hitting the patient's brow bone, a notch can be designed at the top of the eyepiece 3 corresponding to the patient's brow bone. The notch can leave a certain space to accommodate the patient's brow bone, thereby allowing the eyepiece 3 to be closer to the patient's eye to be examined, and the fundus image captured by the fundus imaging unit is larger.

[0054] In an optional embodiment, the eyepiece 3 adopts a wide-angle lens.

[0055] The specific structure of the fundus imaging unit may also adopt the fundus imaging structure in existing ophthalmic instruments, such as the fundus imaging optical path of a fundus camera. To save space, its specific structure will not be described in detail.

[0056] In an optional embodiment, the motion mechanism 2 further includes a second motion platform 23 connected between the first motion platform 21 and the lifting unit 22, and the second motion platform 23 is used to drive the lifting unit 22 to move horizontally left and right relative to the eye to be inspected.

[0057] The motion mechanism 2 can realize the movement of the eyepiece 3 in three directions, namely, X, Y and Z, so as to facilitate the adjustment of the spatial position of the eyepiece 3.

[0058] Specifically, the second motion platform 23 can adopt the following motion platform structure, for example: the second motion platform 23 includes a sliding frame, a second linear bearing and a limit ring; the sliding frame is located on the main base plate 212, and the sliding frame is provided with a sliding channel, the sliding shaft 211 passes through the sliding channel, the sliding shaft 211 is connected to the sliding frame through the second linear bearing, the limit ring is located at the end of the sliding channel, and the sliding frame moves back and forth along the axial direction of the sliding shaft 211 through the second linear bearing.

[0059] In an optional embodiment, the optical axis of the eyepiece 3 is tilted upward by 5-15° relative to the horizontal plane.

[0060] Specifically, the optical axis of the eyepiece 3 may be tilted upward by 5°, 8°, 10°, 12°, or 15° relative to the horizontal plane.

[0061] In a preferred embodiment, the optical axis of the eyepiece 3 is tilted upward by 8° relative to the horizontal plane, at which point the collision ratio between the lens of the eyepiece 3 and the patient's head is minimal.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fundus imaging device, characterized in that: It comprises a motion mechanism (2), an eyepiece (3) and a fundus imaging unit; The optical axis of the eyepiece (3) is tilted upward at a preset angle relative to a horizontal plane, and the motion mechanism (2) is used to drive the eyepiece (3) to move relative to the eye to be examined; The fundus imaging unit is used to perform fundus imaging on the eye to be examined, and the imaging optical axis of the fundus imaging unit coincides with the optical axis of the eyepiece (3).

2. The fundus imaging device according to claim 1, characterized in that: When the motion mechanism (2) drives the eyepiece (3) to move along the extension direction of the optical axis of the eyepiece (3), the fundus imaging unit follows the eyepiece (3) to move along the extension direction of the optical axis of the eyepiece (3).

3. The fundus imaging device according to claim 1, characterized in that: The apparatus further comprises a detection component (1) and a control component, wherein the detection component (1) is connected to the motion mechanism (2), and the detection component (1) is used to obtain displacement change information of the motion mechanism (2) when the motion mechanism (2) moves horizontally forward and backward relative to the eye under examination, and convert the information into a first electrical signal, and the motion mechanism (2) and the detection component (1) are both electrically connected to the control component, and the control component is used to control the motion mechanism (2) according to the first electrical signal to drive the eyepiece (3) and the fundus imaging unit to move together in the vertical direction.

4. The fundus imaging device according to claim 3, characterized in that: The motion mechanism (2) comprises a first motion platform (21), the first motion platform (21) comprising a sliding shaft (211) for realizing the horizontal forward and backward movement of the eyepiece (3) relative to the eye under examination, and the detection component (1) is connected to the sliding shaft (211).

5. The fundus imaging device according to claim 4, characterized in that: The detection assembly (1) comprises a support seat (11), a grating ruler (12), a sliding seat (13) and a reading head (14); The sliding shaft (211) is connected to the sliding seat (13), the sliding seat (13) and the supporting seat (11) are slidably matched, and the sliding direction is parallel to the direction in which the sliding shaft (211) drives the eyepiece (3) to move relative to the eye to be inspected; The grating ruler (12) is mounted on the support seat (11), and the extension direction of the grating ruler (12) is parallel to the sliding direction of the sliding seat (13); The reading head (14) is mounted on the sliding seat (13) and is electrically connected to the control component, and the reading head (14) is used to obtain the displacement change information and convert it into a first electrical signal.

6. The fundus imaging device according to claim 5, characterized in that: When the sliding shaft (211) drives the eyepiece (3) to move horizontally back and forth relative to the eye under examination and has rotational freedom relative to the support seat (11), the sliding seat (13) and the sliding shaft (211) are rotationally connected via a bearing (15).

7. The fundus imaging device according to claim 4, characterized in that: The motion mechanism (2) further comprises a lifting unit (22) for driving the eyepiece (3) to move up and down, the lifting unit (22) being electrically connected to the control component, and the control component being used to control the lifting of the lifting unit (22) according to the first electrical signal.

8. The fundus imaging device according to claim 7, characterized in that: The lifting unit (22) comprises a rotating component (221), a rotating collection component (222), a driving mechanism (223) and a lifting platform (224); The rotating component (221) is drivingly connected to the rotating collection component (222), and the rotating collection component (222) is used to receive parameter information of the rotating component (221) during the rotating process and convert it into a second electrical signal; The driving mechanism (223) is in transmission connection with the lifting platform (224), the driving mechanism (223) is used to drive the lifting platform (224) to move in a vertical direction, and the eyepiece (3) is connected to the lifting platform (224); The rotating collection component (222) and the driving mechanism (223) are both electrically connected to the control component, and the control component is used to control the action of the driving mechanism (223) according to the first electrical signal and the second electrical signal.

9. The fundus imaging device according to claim 7, characterized in that: The motion mechanism (2) further comprises a second motion platform (23) connected between the first motion platform (21) and the lifting unit (22), the second motion platform (23) being used to drive the lifting unit (22) to move horizontally left and right relative to the eye to be examined.

10. The fundus imaging device according to any one of claims 1 to 9, characterized in that: The optical axis of the eyepiece (3) is inclined upward by 5-15° relative to the horizontal plane.

Images