Refraction compensation device for ophthalmology imaging equipment and ophthalmology imaging equipment

Abstract

The invention provides a refraction compensation device for ophthalmology imaging equipment and the ophthalmology imaging equipment, and the refraction compensation device for the ophthalmology imaging equipment comprises a refraction compensation assembly and a focusing assembly. The focusing assembly comprises a driving part, a transmission assembly and a follow-up assembly; the refraction compensation assembly is connected with the follow-up assembly; the refraction compensation assembly comprises a compensation lens, a compensation lens barrel, a compensation linear lens barrel, a sliding block and a compensation cam lens barrel, the compensation lens is connected with the compensation lens barrel, the compensation lens and the compensation lens barrel are jointly installed in the compensation linear lens barrel, and the compensation linear lens barrel is installed in the compensation cam lens barrel; the compensation cam lens cone is provided with a curved first groove, and the compensation linear lens cone is provided with a linear second groove. And the sliding block is arranged on the compensating lens cone and is connected with the first groove and the second groove respectively. According to the invention, refraction compensation is adjusted in real time, automatic focusing is carried out, and the position precision of the compensation lens in the movement process is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical devices, and in particular, to a refractive compensation device for ophthalmic imaging equipment and the ophthalmic imaging equipment. Background Art

[0002] The refractive compensation device is an indispensable mechanism in ophthalmic equipment. When performing eye examinations on patients with different refractive powers, in order to achieve the best focal position, a refractive compensation device can be used for refractive correction to obtain accurate eye examination data. In the optical system, for different patients with different refractive powers, a compensation lens group will be used to compensate for the aberration, and the position of the compensation lens group corresponds to the focal length one by one.

[0003] In the current ophthalmic examination process, manual focusing is usually used for focusing. However, if the manual focusing is inaccurate or the focusing is done frequently, the examination time will be prolonged, the work efficiency will be low, and the patient experience will be affected. Therefore, there is an urgent need for a refractive compensation device that can adapt to different refractive powers. Summary of the invention

[0004] In view of the defects in the prior art, the purpose of the present disclosure is to provide a refractive compensation device for an ophthalmic imaging device and an ophthalmic imaging device.

[0005] To achieve the above-mentioned object, according to a first aspect of the present disclosure, a refractive compensation device for an ophthalmic imaging device is provided, comprising: a refractive compensation component and a focusing component;

[0006] The focusing assembly comprises a driving component, a transmission component and a follower component, wherein the driving component is connected to the transmission component, and the transmission component is connected to the follower component;

[0007] The refractive compensation component is connected to the follower component;

[0008] The refractive compensation assembly comprises a compensation lens, a compensation lens barrel, a compensation linear lens barrel, a slider and a compensation cam lens barrel, wherein the compensation lens is connected to the compensation lens barrel, the compensation lens and the compensation lens barrel are installed together inside the compensation linear lens barrel, and the compensation linear lens barrel is installed inside the compensation cam lens barrel;

[0009] The compensation cam lens barrel is provided with a first curved groove, and the compensation linear lens barrel is provided with a second linear groove;

[0010] The slider is arranged on the compensation lens barrel, and the slider is connected to the first groove and the second groove respectively.

[0011] Optionally, the driving component includes a motor, which is connected to the transmission assembly and is used to drive the transmission assembly to perform linear motion;

[0012] The follower assembly includes a gear and a first rack. The gear is connected to the transmission assembly. The gear cooperates with the first rack to convert the linear motion of the transmission assembly into rotational motion.

[0013] Optionally, a second rack is provided on the outer wall of the compensation cam barrel, and the second rack cooperates with the gear to cause the compensation cam barrel to rotate.

[0014] Optionally, the transmission assembly includes a screw rod, a nut, and a movable bottom plate;

[0015] One end of the lead screw is connected to the motor, the nut passes through the lead screw and is arranged on the lead screw, and the nut is used to drive the movable base plate to perform linear motion.

[0016] Optionally, the refractive compensation component is arranged on the movable base plate.

[0017] Optionally, it further includes a fixed base plate, on which a guide component is arranged, and the movable base plate is arranged on the guide component of the fixed base plate, and the movable base plate performs linear motion on the guide component.

[0018] Optionally, the gear is arranged on the movable base plate, and the first rack is fixed on the fixed base plate.

[0019] Optionally, the follower assembly further includes a gear mounting seat, and the gear is arranged on the movable base plate through the gear mounting seat.

[0020] According to a second aspect of the present disclosure, an ophthalmic imaging device is provided, comprising the refractive compensation device and controller for the ophthalmic imaging device provided in the first aspect of the present disclosure,

[0021] The refractive compensation device for ophthalmic imaging equipment is used to correct the image quality of an image captured of an eye to be inspected, and the controller is used to adjust the motion information of a driving component of the refractive compensation device for ophthalmic imaging equipment according to the image quality of the image.

[0022] Optionally, the refractive compensation device for ophthalmic imaging equipment also includes a first encoder and a second encoder, the first encoder is installed on the driving component, and the second encoder is installed on the follow-up component, the first encoder is used to feedback the motion information and / or position information of the driving component to the controller, and the second encoder is used to feedback the motion information and / or position information of the follow-up component to the controller.

[0023] Compared with the prior art, the embodiments of the present disclosure have at least one of the following beneficial effects:

[0024] Through the above technical scheme, under the action of the focusing assembly, a compensation cam barrel and a slider are used, and the curvilinear motion of the slider on the first groove can be converted into the linear motion of the compensation lens and the compensation barrel through the rotational motion of the compensation cam barrel, thereby completing a complex curve transfer process. The structure is relatively compact, and the supporting strength of the barrel can be improved. The position accuracy of the compensation lens during the movement process can also be improved, thereby realizing real-time adjustment of refractive compensation and quickly completing automatic focusing.

[0025] The focusing assembly of the embodiment of the present disclosure adopts a single driving component, which transmits the driving force generated by the driving component to the refractive compensation component through a transmission component and a follower component. The driving component realizes motion control of the refractive compensation component in two dimensions, reducing the complexity of using dual motors. In addition, the mechanical transmission method is stable and reliable, and has good repeatability.

[0026] The embodiments of the present disclosure use a refractive compensation device of an ophthalmic imaging device, and a controller determines the optimal focus position through image information and received motion information of the refractive compensation device, thereby achieving fast automatic focus, simple operation, and time saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present disclosure will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0028] Figure 1 The figure is a schematic diagram of the overall structure of a refractive compensation device for an ophthalmic imaging device according to an exemplary embodiment.

[0029] Figure 2 is a cross-sectional view of a refractive compensation assembly according to an exemplary embodiment.

[0030] Figure 3 It is a schematic structural diagram of a refractive compensation component according to an exemplary embodiment.

[0031] Figure 4 The diagram is a schematic diagram showing the relationship between the moving position of a slider on a curve and the focal position during the movement of a compensation lens according to an exemplary embodiment.

[0032] Figure 5 It is a schematic diagram showing the relationship between the movement distance and the focal position of a motor-driven transmission component according to an exemplary embodiment.

[0033] Figure 6 The figure is a schematic diagram of a light path for collecting light reflected from an eye to be inspected according to an exemplary embodiment.

[0034] Description of Reference Numerals

[0035] 1000 diopter compensation device

[0036] 110 Refractive compensation component

[0037] 111 Compensation lens

[0038] 112 Compensating tube

[0039] 113 Compensation Cam Barrel

[0040] 114 Compensating Linear Tube

[0041] 115 Slider

[0042] 116 First Groove

[0043] 117 Second rack

[0044] 121 Motor

[0045] 122 Motor base

[0046] 123 Fixed base plate

[0047] 124 Guide components

[0048] 130 Transmission components

[0049] 131 Screw

[0050] 132 Bearing seat

[0051] 133 Nut

[0052] 134 Nut-removable base plate connection block

[0053] 135 Removable base plate

[0054] 141 First rack

[0055] 142 Gear

[0056] 143 Gear Mounting Seat

[0057] 150 Eyepiece Assembly

[0058] 151 Eyepiece

[0059] 152 Eyepiece Base

[0060] 153 Front Panel

[0061] 160 Eyes examined

[0062] 170 Reflector assembly

[0063] 180 Convex lens assembly

[0064] 190 High-speed scanning galvanometer

[0065] 200 signal acquisition camera DETAILED DESCRIPTION

[0066] The present disclosure is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present disclosure, but are not intended to limit the present disclosure in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present disclosure. These all fall within the scope of protection of the present disclosure.

[0067] In the above description of the present disclosure, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of description and simplified description, and do not indicate or imply 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 a limitation of the present disclosure. Similarly, the use of the words first, second, and third, etc. does not indicate any order, and these words can be interpreted as names.

[0068] Figure 1 The figure is a schematic diagram of the overall structure of a refractive compensation device for an ophthalmic imaging device according to an exemplary embodiment. Figure 2 is a cross-sectional view of a refractive compensation assembly according to an exemplary embodiment. Figure 3 It is a schematic structural diagram of a refractive compensation component according to an exemplary embodiment.

[0069] like Figures 1 to 3 As shown, the present disclosure provides a refractive compensation device 1000 for ophthalmic imaging equipment, including: a refractive compensation component 110 and a focusing component. The focusing component is used for focusing, and the refractive compensation component 110 is used to adjust the focal length, find the best focus position, and improve the image quality of the image of the subject's eye collected.

[0070] The focusing assembly includes a driving assembly, a transmission assembly 130 and a follower assembly, wherein the driving assembly is connected to the transmission assembly 130, and the transmission assembly 130 is connected to the follower assembly. The driving assembly is used to generate driving force, the transmission assembly 130 is used to transmit driving force, and the follower assembly is used for motion conversion.

[0071] The refractive compensation assembly 110 is connected to the follower assembly.

[0072] like Figure 2As shown, the refractive compensation assembly 110 includes a compensation lens 111, a compensation lens barrel 112, a compensation linear lens barrel 114, a slider 115 and a compensation cam lens barrel 113. The compensation lens 111 is connected to the compensation lens barrel 112. The compensation lens 111 and the compensation lens barrel 112 are jointly installed inside the compensation linear lens barrel 114. The compensation linear lens barrel 114 is installed inside the compensation cam lens barrel 113.

[0073] The compensating lens barrel 112 can move up and down along the inner wall of the compensating linear lens barrel 114, and the compensating cam lens barrel 113 can rotate on the compensating linear lens barrel 114, so that the rotational movement of the compensating cam lens barrel 113 is converted into the linear movement of the compensating lens barrel 112 through the coordinated movement of the slider 115 with the compensating cam lens barrel and the compensating linear lens barrel 114, thereby realizing the linear movement of the compensating lens barrel 111 driven by the compensating lens barrel 112.

[0074] The compensation linear lens barrel 114 is used to fix and guide the compensation lens barrel 112 to prevent the compensation lens 111 from rotating during movement and to prevent the compensation lens barrel 112 from getting stuck during movement, so that the compensation lens 111 can perform smooth linear movement.

[0075] like Figure 3 As shown, the compensation cam lens barrel 113 is provided with a first groove 116 in a curved shape, and the compensation linear lens barrel 114 is provided with a second groove (not shown) in a linear shape.

[0076] The axial direction of the eye is usually the direction of a specific line from the cornea to the retina, such as the direction of a line from the corneal vertex to the fovea. In the present disclosure, the axial direction of the eye being examined is along the horizontal direction, and the axial direction of the eye being examined can be adjusted according to the actual inspection posture of the eye being examined.

[0077] Specifically, the first groove 116 is arranged on the side wall of the compensation cam lens barrel 113, and the second groove is arranged on the side wall of the compensation linear lens barrel 114 along the direction perpendicular to the axial direction of the eye to be inspected, that is, in the present disclosure, the second groove is arranged on the side wall of the compensation linear lens barrel 114 along the vertical direction.

[0078] The slider 115 is disposed on the compensation lens barrel 112 , and the slider 115 is connected to the first groove 116 and the second groove respectively.

[0079] The first groove 116 is used as a guide groove for the slider 115 to perform curved motion relative to the compensating cam lens barrel 113 , and the second groove is used as a guide groove for the slider 115 to perform linear motion relative to the compensating linear lens barrel 114 .

[0080] When the compensation cam lens barrel 113 performs rotational motion, the slider 115 performs curved motion along the first groove 116 on the compensation cam lens barrel 113 under the action of the first groove 116, and simultaneously performs linear motion along the second groove on the compensation linear lens barrel 114 under the action of the second groove. The compensation lens barrel 112 arranged inside the compensation linear lens barrel 114 is connected to the slider 115, and the compensation lens barrel 112 performs linear motion along the second groove through the connected slider 115, thereby realizing the linear motion of the compensation lens 111 on the second groove in a direction perpendicular to the axial direction of the eye to be inspected.

[0081] The curve of the first groove 116 is determined by curve fitting according to the focus position and the position of the compensation lens.

[0082] Figure 4 The diagram is a schematic diagram showing the relationship between the moving position of a slider on a curve and the focal position during the movement of a compensation lens according to an exemplary embodiment.

[0083] like Figure 4 As shown, the horizontal axis represents the moving position of the slider 115 on the curve where the first groove 116 is located, and the vertical axis represents the focal position. When the compensating lens 111 is moving, the moving position of the slider 115 on the curve where the first groove 116 is located corresponds to the focal position one by one. The position of the compensating lens 111 is adjusted by adjusting the position of the slider 115, and the focal position can be adjusted in real time to meet the imaging requirements of patients with different refractive powers.

[0084] Through the above technical scheme, under the action of the focusing assembly, the compensation cam barrel 113 and the slider 115 are used, and the first groove 116 can act on the slider 115 through the rotational movement of the compensation cam barrel 113, thereby realizing the linear motion of the compensation lens 111 and the compensation barrel 112 in a direction perpendicular to the eye axis, completing a complex curve transfer process, and the structure is relatively compact, and the supporting strength of the barrel can be improved. It can also improve the position accuracy of the compensation lens 111 during the movement process, realize real-time adjustment of refractive compensation, and quickly complete automatic focusing.

[0085] like Figure 1 As shown, in a possible embodiment, the driving component includes a motor 121, and the motor 121 is connected to the transmission assembly 130 to drive the transmission assembly 130 to perform linear motion.

[0086] The motor 121 is used to generate driving force.

[0087] The driving component further includes a motor base 122 , which is used to install and support the motor 121 , and the motor 121 is fixed on the motor base 122 .

[0088] Figure 5 It is a schematic diagram showing the relationship between the movement distance and the focal position of a motor-driven transmission component according to an exemplary embodiment.

[0089] like Figure 5 As shown, the horizontal axis represents the movement distance of the transmission component 130, and the vertical axis represents the focal position. The movement distance of the transmission component 130 corresponds to the focal position one by one. When the motor 121 is used to provide driving force, the focal position can be adjusted in real time according to the movement distance of the transmission component 130 to meet the imaging requirements of patients with different refractive powers.

[0090] Each focal position corresponds to a movement position of a transmission component 130 and a moving position of a slider 115 on the curve. The driving force provided by the motor 121 drives the transmission component 130 to move, adjusts the moving position of the slider 115 on the curve of the first groove 116, and then adjusts the moving position of the compensation lens 111 on the second groove. The focal position can be adjusted in real time to meet the imaging requirements of patients with different refractive powers.

[0091] like Figure 1 As shown, in a possible embodiment, the transmission assembly 130 includes a screw rod 131 , a nut 133 , and a movable base plate 135 .

[0092] One end of the screw rod 131 is connected to the motor 121 , and the nut 133 passes through the screw rod 131 and is disposed on the screw rod 131 . The nut 133 is used to drive the movable base plate 135 to perform linear motion.

[0093] One end of the screw rod 131 is coaxially connected to the motor shaft of the motor 121 .

[0094] The transmission assembly 130 further includes a bearing seat 132 . The other end of the screw rod 131 is fixed to the bearing seat 132 . The bearing seat 132 is used to support the screw rod 131 .

[0095] The transmission assembly 130 also includes a nut-movable base plate connecting block 134, which passes through the screw rod 131 and is arranged on the screw rod 131, and one end of the nut-movable base plate connecting block 134 is connected to the nut 133, and the other end of the nut-movable base plate connecting block 134 is connected to the movable base plate 135. The nut-movable base plate connecting block 134 is used for power transmission to drive the movable base plate 135 to perform linear motion.

[0096] A nut 133 is used in the transmission assembly 130. Preferably, the nut 133 is an anti-backlash nut to eliminate the gap caused by the mechanical connection between the screw rod 131 and the movable base plate 135, eliminate the return gap, and improve the accuracy of motion control.

[0097] In a possible embodiment, a refractive compensation device 1000 for an ophthalmic imaging device further includes a fixed base plate 123, a guide component 124 is arranged on the fixed base plate 123, a movable base plate 135 is arranged on the guide component 124 of the fixed base plate 123, and the movable base plate 135 performs linear motion on the guide component 124.

[0098] In a possible embodiment, the refractive compensation component 110 is disposed on the movable base plate 135 .

[0099] As an example, the guide component 124 can be a guide rail, two guide rails are set on the fixed base plate 123, the bottom of the movable base plate 135 is installed on the guide rails, and the movable base plate 135 moves linearly along the guide rails. The direction of the linear motion is the axial direction of the eye to be inspected 160, thereby realizing the linear motion of the refractive compensation component 110 set on the movable base plate 135 along the axial direction of the eye to be inspected 160.

[0100] The bearing seat 132 of the transmission assembly 130 of the present disclosure is fixed on the fixed base plate 123 .

[0101] like Figure 1 As shown, in a possible embodiment, the follower assembly includes a gear 142 and a first rack 141, the gear 142 is connected to the transmission assembly 130, and the gear 142 cooperates with the first rack 141 to convert the linear motion of the transmission assembly 130 into rotational motion.

[0102] The gear 142 is disposed on the movable bottom plate 135 , and the first rack 141 is fixed on the fixed bottom plate 123 .

[0103] like Figure 1 As shown, in a possible embodiment, the follower assembly further includes a gear mounting seat 143 , and the gear 142 is disposed on the movable base plate 135 via the gear mounting seat 143 .

[0104] A second rack 117 is disposed on the outer wall of the compensation cam barrel 113 . The second rack 117 cooperates with the gear 142 to cause the compensation cam barrel 113 to rotate.

[0105] Specifically, the second rack 117 is disposed at the bottom of the outer wall of the compensation cam barrel 113 .

[0106] One side of the gear 142 cooperates with the first rack 141 , and the other side of the gear 142 cooperates with the second rack 117 .

[0107] As an example, when the movable base plate 135 performs linear motion on the guide component 124 of the fixed base plate 123, the gear 142 rotates, and the gear 142 cooperates with the first rack 141, and the gear 142 also cooperates with the second rack 117 to compensate for the rotational motion of the cam barrel 113.

[0108] The focusing assembly disclosed in the present invention adopts a single driving component, which transmits the driving force generated by the driving component to the refractive compensation component 110 through the transmission component 130 and the follower component. The driving component realizes the motion control of the refractive compensation component 110 in two dimensions, reducing the complexity of using dual motors. In addition, the mechanical transmission method is stable and reliable, and has good repeatability.

[0109] In a possible embodiment, the present disclosure further provides an ophthalmic imaging device, including the above-mentioned refractive compensation device 1000 for an ophthalmic imaging device and a controller.

[0110] The refractive compensation device 1000 for an ophthalmic imaging device is used to correct the image quality of an image captured of an eye to be inspected 160 , and the controller is used to adjust the motion information of the driving components of the refractive compensation device 1000 for an ophthalmic imaging device according to the image quality of the image.

[0111] The refractive compensation device 1000 for an ophthalmic imaging device also includes a first encoder and a second encoder. The first encoder is installed on a driving component, and the second encoder is installed on a follower component. The first encoder is used to feed back motion information and / or position information of the driving component to a controller, and the second encoder is used to feed back motion information and / or position information of the follower component to the controller.

[0112] like Figure 1 As shown, in a possible embodiment, an ophthalmic imaging device further includes an eyepiece assembly 150, which is mounted on a fixed base plate 123 of a refractive compensation device 1000 for an ophthalmic imaging device, and the eyepiece assembly 150 is used to magnify a real image to generate a virtual image.

[0113] The eyepiece assembly 150 includes an eyepiece 151, an eyepiece base 152, and a front panel 153. The eyepiece 151 is fixed to the front panel 153 through the eyepiece base 152, and the front panel 153 is fixed to the fixed bottom plate 123 of the refractive compensation device 1000 for ophthalmic imaging equipment.

[0114] As an example, the eyepiece 151 can be installed on the eyepiece base 152 by a pressing ring or an adhesive method, and the eyepiece base 152 is fixed to the front panel 153 by screws. Finally, the assembled eyepiece 151, eyepiece base 152, and front panel 153 are installed as a whole on the fixed base plate 123.

[0115] Figure 6The figure is a schematic diagram of a light path for collecting light reflected by a human eye according to an exemplary embodiment.

[0116] like Figure 6 As shown, in a possible embodiment, an ophthalmic imaging device further includes a reflector assembly 170. The reflector assembly 170 is disposed above the refractive compensation assembly 110. The reflector assembly 170 is used to fold the light path to achieve reflection of the light.

[0117] In a possible embodiment, an ophthalmic imaging device further includes a convex lens assembly 180, which is disposed below the fixed base plate 123 and the refractive compensation assembly 110, and is used to converge light.

[0118] In a possible embodiment, an ophthalmic imaging device further includes a high-speed scanning galvanometer 190, which is arranged below the fixed base plate 123 and the refractive compensation component 110, and below the convex lens component 180. The high-speed scanning galvanometer 190 is used to transmit the reflected light of the inspected eye 160 to the signal acquisition camera 200.

[0119] In a possible embodiment, an ophthalmic imaging device further includes a signal acquisition camera 200 , and the signal acquisition camera 200 is used to collect reflected light from the eye to be inspected 160 and form an image.

[0120] like Figure 6 As shown, in a possible embodiment, the ophthalmic imaging device of the present invention is used to examine the eyes of the subject, collect light reflected by the eyes of the subject, and generate an image. When the compensating lens 111 moves, the reflector assembly 170, the convex lens assembly 180 and the high-speed scanning galvanometer 190 move synchronously, thereby changing the focal position.

[0121] How the compensation lens 111 affects the focal position during the movement is exemplified.

[0122] The light reflected by the eye to be inspected 160 is reflected at the fundus, propagates along the axial direction of the eye to be inspected 160, is magnified by the eyepiece 151, and is then reflected by the reflector assembly 170. The light reflected by the reflector assembly 170 propagates in a direction perpendicular to the axial direction of the eye to be inspected 160, passes through the compensation lens 111 of the refractive compensation assembly 110, and is then converged to the high-speed scanning galvanometer 190 through the convex lens assembly 180, and finally is reflected by the high-speed scanning galvanometer 190 to be reflected to the signal acquisition camera 200 to form an image.

[0123] Specifically, in a possible embodiment, the process of auto-focusing includes:

[0124] After receiving the automatic focusing start signal sent by the host computer, the controller starts the motor 121 of the refractive compensation device 1000. Driven by the motor 121, the driving force generated by the motor 121 is transmitted to the refractive compensation component 110 through the transmission component 130 and the follower component, and acts on the slider 115 through the first groove 116 and the second groove, thereby driving the compensation lens barrel 112 and the compensation lens 111 to move linearly in a direction perpendicular to the axial direction of the eye 160 to be inspected.

[0125] During the movement of the compensation lens 111, the first encoder feeds back the movement information and / or position information of the motor 121 to the controller in real time, and the second encoder feeds back the movement information and / or position information of the follow-up component to the controller in real time. At each movement position where the motor 121 drives the transmission component 130 to move, the light is refracted by the compensation lens 111 and converged on the convex lens component 180, and then converged to the high-speed scanning galvanometer 190 through the convergence effect of the convex lens component 180, and reflected by the high-speed scanning galvanometer 190 to form an image, that is, the ophthalmic imaging device collects the image corresponding to each movement position where the motor 121 drives the transmission component 130 to move, and the signal acquisition camera 200 sends the image to the controller or processor to calculate the fundus image quality of the eye to be inspected 160 corresponding to each movement position of the transmission component 130, and determine the image with the best image quality.

[0126] The processor may be integrated in the host computer or may be separately provided. The controller is preferably a miniature circuit breaker (MCB). The controller and the processor may be separately provided or may be integrated. The present disclosure does not limit the types of the processor and the controller. Any existing processor and controller that can achieve the purpose of the present disclosure is applicable.

[0127] The evaluation index of image quality may include at least one of a sharpness value, a signal-to-noise ratio, and a resolution of the image.

[0128] When calculating image quality, images within a preset range of the central field of view are preferred, such as images within a range of 20mm×20mm in the center of the field of view, which have less interference information and can reduce calculation errors caused by more interference information in the edge area, thereby improving the calculation accuracy of the image quality and thereby improving the control accuracy of the controller.

[0129] The optimal focus position is determined according to the position of the transmission component 130 corresponding to the image with the best image quality, for example, the image with the maximum sharpness value. The controller sends the position signal of the transmission component 130 corresponding to the optimal focus position to the motor 121. After receiving the position signal of the transmission component 130 corresponding to the optimal focus position, the motor 121 rotates and drives the transmission component 130 to move to the position of the transmission component 130 corresponding to the optimal focus position. At the same time, the first groove 116 acts on the slider 115, and the slider 115 moves on the first groove 116 to the position corresponding to the optimal focus position. The second groove also acts on the slider 115, and the slider 115 moves on the second groove at the same time. Under the movement of the slider 115, the compensation lens 111 also moves with the slider 115 to the position corresponding to the optimal focus, thereby realizing automatic focusing.

[0130] The prerequisite for the autofocus process is to calibrate the transmission assembly 130 and the refractive compensation assembly 110 to the initial zero position, that is, to stop the transmission assembly 130 and the refractive compensation assembly 110 at the optimal focus position corresponding to zero diopter.

[0131] According to the sharpness value of the fundus image of the eye to be inspected 160 obtained by the ophthalmic imaging device, the positions of the transmission component 130 and the refractive compensation component 110 are adjusted to achieve the positions of the transmission component 130 and the refractive compensation component 110 corresponding to the maximum sharpness value of the fundus image of the eye to be inspected 160, that is, the optimal positions of the transmission component 130 and the refractive compensation component 110 at zero diopter, that is, the optimal focus position, and automatic focusing is performed after calibrating the initial zero position.

[0132] In another possible embodiment, the movement direction of the transmission assembly 130 is adjusted and automatic focusing is performed according to the fundus image quality information of the eye to be inspected 160 .

[0133] When the motor 121 drives the transmission component 130 to move in a certain direction, such as the motor 121 drives the transmission component 130 to move in a certain direction according to a preset step distance ΔL, and at the same time, the slider 115 of the refractive compensation component 110 moves along the first groove 116 according to the preset compensation curve f(ΔL) under the action of the first groove 116, and the sharpness value of the fundus image of the examinee's eye 160 is calculated. According to the change of the sharpness value of the fundus image of the examinee's eye 160, it is judged whether the movement direction of the transmission component 130 is correct, and whether the optimal focal position is reached, and the controller of the ophthalmic imaging device controls the movement of the transmission component 130 according to the judgment information.

[0134] Among them, if the sharpness value of the fundus image of the eye to be inspected 160 decreases, the transmission component 130 is adjusted to move in the opposite direction, and at the same time, the slider 115 of the refractive compensation component 110 moves on the first groove 116 according to the preset compensation curve; if the sharpness value of the fundus image of the eye to be inspected 160 increases, the transmission component 130 continues to move in this direction, and at the same time, the slider 115 of the refractive compensation component 110 moves on the first groove 116 according to the preset compensation curve.

[0135] The preset compensation curve is the curve where the first groove 116 is located.

[0136] When the sharpness value of the fundus image of the eye to be inspected 160 reaches the maximum, the motor 121 and the refractive compensation assembly 110 reach the optimal focus position, that is, the best imaging position.

[0137] When the optimal focus position is reached, the current focus position is fed back through the rotation amount of the motor 121 detected by the first encoder and the rotation amount of the gear 142 detected by the second encoder.

[0138] If the optimal focus position is not reached, the movement of the transmission component 130 is controlled according to the sharpness value of the fundus image of the eye to be inspected 160, and the positions of the transmission component 130 and the refractive compensation component 110 are adjusted until the sharpness value of the fundus image of the eye to be inspected 160 reaches the maximum, and the optimal focus position is determined to achieve automatic focusing.

[0139] Through the above technical solution, the ophthalmic imaging device disclosed in the present invention determines the optimal focus position through imaging information and received signal strength, thereby achieving fast automatic focus, simple operation, and time saving.

[0140] The above describes the specific embodiments of the present disclosure. It should be understood that the present disclosure is not limited to the above specific embodiments, and those skilled in the art can make various deformations or modifications within the scope of the claims, which does not affect the essence of the present disclosure. The above preferred features can be used in any combination without conflicting with each other.

Claims

1. A refractive compensation device for an ophthalmic imaging device, characterized in that: include: Refractive compensation components and focusing components; The focusing assembly comprises a driving component, a transmission component and a follower component, wherein the driving component is connected to the transmission component, and the transmission component is connected to the follower component; The refractive compensation component is connected to the follower component; The refractive compensation assembly comprises a compensation lens, a compensation lens barrel, a compensation linear lens barrel, a slider and a compensation cam lens barrel, wherein the compensation lens is connected to the compensation lens barrel, the compensation lens and the compensation lens barrel are installed together inside the compensation linear lens barrel, and the compensation linear lens barrel is installed inside the compensation cam lens barrel; The compensation cam lens barrel is provided with a first curved groove, and the compensation linear lens barrel is provided with a second linear groove; The slider is arranged on the compensation lens barrel, and the slider is connected to the first groove and the second groove respectively.

2. The refractive compensation device for ophthalmic imaging equipment according to claim 1, characterized in that: The driving component includes a motor, which is connected to the transmission assembly and is used to drive the transmission assembly to perform linear motion; The follower assembly includes a gear and a first rack. The gear is connected to the transmission assembly. The gear cooperates with the first rack to convert the linear motion of the transmission assembly into rotational motion.

3. The refractive compensation device for ophthalmic imaging equipment according to claim 2, characterized in that: A second rack is disposed on the outer wall of the compensation cam lens barrel, and the second rack cooperates with the gear to make the compensation cam lens barrel rotate.

4. The refractive compensation device for ophthalmic imaging equipment according to claim 2, characterized in that: The transmission assembly includes a screw rod, a nut, and a movable bottom plate; One end of the lead screw is connected to the motor, the nut passes through the lead screw and is arranged on the lead screw, and the nut is used to drive the movable base plate to perform linear motion.

5. The refractive compensation device according to claim 4, characterized in that: The refractive compensation component is arranged on the movable base plate.

6. The refractive compensation device for ophthalmic imaging equipment according to claim 4, characterized in that: It also includes a fixed base plate, on which a guide component is arranged, and the movable base plate is arranged on the guide component of the fixed base plate, and the movable base plate performs linear motion on the guide component.

7. The refractive compensation device for ophthalmic imaging according to claim 6, characterized in that: The gear is arranged on the movable bottom plate, and the first rack is fixed on the fixed bottom plate.

8. The refractive compensation device for ophthalmic imaging equipment according to claim 7, characterized in that: The follower assembly also includes a gear mounting seat, and the gear is arranged on the movable bottom plate through the gear mounting seat.

9. An ophthalmic imaging device, characterized in that: A refractive compensation device and a controller for an ophthalmic imaging device comprising any one of claims 1 to 8, The refractive compensation device for ophthalmic imaging equipment is used to correct the image quality of an image captured of an eye to be inspected, and the controller is used to adjust the motion information of a driving component of the refractive compensation device for ophthalmic imaging equipment according to the image quality of the image.

10. The ophthalmic imaging device according to claim 9, characterized in that: The refractive compensation device for ophthalmic imaging equipment also includes a first encoder and a second encoder, the first encoder is installed on the driving component, and the second encoder is installed on the follower component, the first encoder is used to feed back the motion information and / or position information of the driving component to the controller, and the second encoder is used to feed back the motion information and / or position information of the follower component to the controller.

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