Diopter illumination compensation structure and fundus camera

Abstract

The utility model discloses a diopter illumination compensation structure and a fundus camera, and relates to the technical field of medical equipment.The diopter illumination compensation structure comprises a base, a diaphragm assembly and a driving assembly; a movable sliding groove is concavely formed in one end surface of the base; the diaphragm assembly is accommodated in the movable chute; the driving assembly is fixedly arranged on the base; the driving assembly comprises a driving part which is in driving connection with the diaphragm assembly and used for driving the diaphragm assembly to have a movement stroke in the movable sliding groove in the first direction. According to the technical scheme, the diaphragm assembly is contained in the movable sliding groove, meanwhile, the driving part is in driving connection with the diaphragm assembly and used for driving the diaphragm assembly to have the movable stroke in the movable sliding groove in the first direction, in this way, the illumination range can be adjusted to be matched with the imaging position, and then fundus photos with even illumination are obtained; in other words, displacement adjustment of the illumination diaphragm hole can be achieved structurally, so that complete and uniform illumination can be achieved for imaging under different diopters.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to a refractive power illumination compensation structure and a fundus camera. Background Technology

[0002] An ophthalmic camera is an examination device that uses images of the fundus of the eye to determine if there are any lesions in the optic nerve, retina, choroid, and refractive media. Generally, because each person's eye has different refractive power, the optical system of a fundus camera must have focusing capabilities during the shooting process to ensure that the fundus image is in the clearest state when it is imaged by the CCD camera after passing through the optical path system. However, in a typical fundus camera, if the illumination optical path is adjusted synchronously during focusing, the structure becomes complex. If the illumination optical path does not adjust with the focusing system, uneven illumination will occur in the fundus image, such as one side being bright and the other dark. In severe cases, local features of the fundus may be unclear, thus affecting the professional's diagnosis. Utility Model Content

[0003] The main purpose of this invention is to propose a refractive power illumination compensation structure and a fundus camera, aiming to provide a refractive power illumination compensation structure and a fundus camera that can make fundus photographs uniformly illuminated.

[0004] To achieve the above objectives, the refractive power illumination compensation structure proposed in this utility model is applied to a fundus camera and includes:

[0005] The base has a movable groove recessed on one end face;

[0006] The aperture assembly is housed within the movable slide; and,

[0007] A drive assembly is fixed on the base; the drive assembly includes a drive part that drives the aperture assembly to have a movable stroke in the movable slide along a first direction.

[0008] In one embodiment, the driving assembly includes a first motor, which is fixed on the base and whose main shaft is connected to the aperture assembly to drive the aperture assembly to reciprocate along a first direction.

[0009] The drive unit includes the main shaft of the first motor.

[0010] In one embodiment, the aperture assembly includes:

[0011] The seat body is movably mounted on the base and has a travel relative to the base along a first direction;

[0012] A nut block, fixedly mounted on the base; and,

[0013] The lead screw extends along a first direction, with one end driving and connecting to the spindle of the first motor, and the other end driving and connecting to the nut block.

[0014] In one embodiment, the aperture assembly further includes a pressure plate, which is disposed on the base and fixedly connected to the base.

[0015] In one embodiment, the aperture assembly further includes:

[0016] Mounting base, fixedly mounted on the base body;

[0017] A second motor, mounted on the mounting base, has its main shaft passing through the mounting base into the movable slide groove; and...

[0018] The aperture turntable is driven by the main shaft of the second motor.

[0019] In one embodiment, the aperture assembly further includes a first fixing plate and a second fixing plate, which are respectively disposed on the two end faces of the aperture turntable along the extension direction of the second motor spindle.

[0020] In one embodiment, the diopter illumination compensation structure further includes a limiting component disposed on the base and between the aperture assembly to limit the travel of the aperture assembly along a first direction.

[0021] In one embodiment, the limiting component includes a limiting sensor and a limiting detection piece, wherein one of the limiting sensor and the limiting detection piece is disposed on the base along a first direction, and the other is disposed on the aperture assembly.

[0022] In one embodiment, the diopter illumination compensation structure further includes a cover plate disposed on the base relative to the movable slide groove to close the movable slide groove.

[0023] This utility model also proposes a fundus camera, which includes the refractive power illumination compensation structure as described above;

[0024] The diopter illumination compensation structure includes:

[0025] The base has a movable groove recessed on one end face;

[0026] The aperture assembly is housed within the movable slide; and,

[0027] A drive assembly is fixed on the base; the drive assembly includes a drive part that drives the aperture assembly to have a movable stroke in the movable slide along a first direction.

[0028] The technical solution of this utility model adopts the method of accommodating the aperture assembly in the movable slide groove, and at the same time driving the drive unit to drive the aperture assembly to have a moving stroke in the movable slide groove along the first direction. With this configuration, the illumination range can be adjusted to match the imaging position, thereby obtaining a fundus photograph with uniform illumination. That is, the displacement adjustment of the illumination aperture can be realized structurally, so that the imaging under different refractive power conditions can obtain complete and uniform illumination. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 A schematic diagram of an embodiment of the refractive power illumination compensation structure provided by this utility model;

[0031] Figure 2 for Figure 1 Internal sectional view in the main view direction.

[0032] Explanation of icon numbers:

[0033] 100. Diopter illumination compensation structure; 1. Base; 11. Movable slide; 2. Aperture assembly; 21. Seat; 22. Nut block; 23. Lead screw; 24. Pressure plate; 25. Mounting seat; 26. Second motor; 27. Aperture turntable; 28. First fixing plate; 29. ​​Second fixing plate; 3. Drive assembly; 31. Drive unit; 32. First motor; 4. Limit assembly; 41. Limit sensor; 42. Limit detection plate; 5. Cover plate.

[0034] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0036] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0038] An ophthalmic camera is an examination device that uses images of the fundus of the eye to determine if there are any lesions in the optic nerve, retina, choroid, and refractive media. Generally, because each person's eye has different refractive power, the optical system of a fundus camera must have focusing capabilities during the shooting process to ensure that the fundus image is in the clearest state when it is imaged by the CCD camera after passing through the optical path system. However, in a typical fundus camera, if the illumination optical path is adjusted synchronously during focusing, the structure becomes complex. If the illumination optical path does not adjust with the focusing system, uneven illumination will occur in the fundus image, such as one side being bright and the other dark. In severe cases, local features of the fundus may be unclear, thus affecting the professional's diagnosis.

[0039] To address the aforementioned problems, this invention proposes a refractive power illumination compensation structure and a fundus camera, aiming to provide a refractive power illumination compensation structure and fundus camera that ensure uniform illumination in fundus photographs. Figures 1 to 2 This is a schematic diagram of one embodiment of the refractive power illumination compensation structure of this utility model.

[0040] Please refer to Figures 1 to 2In one embodiment of the present invention, the diopter illumination compensation structure 100 includes a base 1, an aperture assembly 2, and a drive assembly 3; a movable groove 11 is recessed on one end face of the base 1; the aperture assembly 2 is housed in the movable groove 11; the drive assembly 3 is fixed on the base 1; the drive assembly 3 includes a drive part 31, which is driven to connect to the aperture assembly 2, and is used to drive the aperture assembly 2 to have a movable stroke in the movable groove 11 along a first direction.

[0041] The technical solution of this utility model adopts the method of accommodating the aperture assembly 2 in the movable slide groove 11, and at the same time driving the drive unit 31 to drive the aperture assembly 2 to have a moving stroke in the movable slide groove 11 along the first direction. With this configuration, the illumination range can be adjusted to match the imaging position, thereby obtaining a fundus photograph with uniform illumination. That is, the displacement adjustment of the illumination aperture can be realized structurally, so that the imaging under different refractive power conditions can obtain complete and uniform illumination.

[0042] It is understood that the illumination aperture and the CCD camera are respectively positioned on opposite sides of the first direction and fixed to the base 1 relative to the aperture assembly 2. Thus, the imaging range of the CCD camera is fixed. However, due to the refractive power of the human eye, the image of the fundus is linearly offset along the first direction within the imaging range of the CCD camera. Therefore, by moving the aperture assembly 2 along the first direction, the illumination range of the illumination aperture on the CCD camera can be offset accordingly with the offset of the fundus image. This ensures that the final fundus image always has uniform and full illumination, avoiding the uneven illumination phenomenon in fundus images in the prior art, such as one side of the image being bright and the other side being dark. In severe cases, local features of the fundus may not be visible, thus affecting the diagnosis of the image by professionals.

[0043] Specifically, due to the change in refractive power, the range of change in fundus imaging on the CCD camera is linear. Therefore, by means of testing, it can be determined how much the fundus imaging in a certain optical path system will deviate at a fixed refractive power. Thus, the forward and backward displacement distance of the aperture rotator 27 can be defined as several fixed values. For example, in one embodiment, when shooting myopia with a focusing refractive power of -700° or greater, the aperture rotator 27 moves to position -2; when shooting myopia with a focusing refractive power of -700° to -200°, the aperture rotator 27 moves to position -1; when shooting myopia with a focusing refractive power of -200° to 200° hyperopia, the aperture rotator 27 moves to position 0; when shooting myopia with a focusing refractive power of +200° to +700° hyperopia, the aperture rotator 27 moves to position +1; and when shooting hyperopia with a focusing refractive power of +700° or greater, the aperture rotator 27 moves to position +2.

[0044] Further, please refer to Figures 1 to 2 The driving component 3 includes a first motor 32, which is fixed to the base 1. Its main shaft is connected to the aperture assembly 2 to drive the aperture assembly 2 to reciprocate along a first direction. The driving part 31 includes the main shaft of the first motor 32. It is understood that in order to drive the aperture assembly 2 to move along the first direction, thereby ensuring that the fundus image on the CCD camera is covered with a uniform illumination range, the driving component 3 specifically includes the first motor 32, which is fixed to the base 1. Its main shaft is connected to the aperture assembly 2 to drive the aperture assembly 2 to reciprocate along the first direction, thereby ensuring that the fundus image on the CCD camera is covered with a uniform illumination range, thus obtaining a uniformly illuminated fundus photograph, which helps professionals diagnose the photograph. The driving part 31 includes the main shaft of the first motor 32.

[0045] Further, please refer to Figures 1 to 2 The aperture assembly 2 includes a base 21, a nut block 22, and a lead screw 23; the base 21 is movably mounted on the base 1 and has a travel relative to the base 1 in a first direction; the nut block 22 is fixed on the base 21; the lead screw 23 extends in the first direction, with one end driving and connecting to the spindle of the first motor 32, and the other end driving and connecting to the nut block 22. It is understandable that, in order to help the aperture assembly 2 move along the first direction, in addition to the direct drive of the first motor 32, the aperture assembly 2 also needs to cooperate. Therefore, in order to cooperate with the drive of the first motor 32, the aperture assembly 2 specifically includes the base 21, the nut block 22, and the lead screw 23. The base 21 is movably mounted on the base 1 and has a travel relative to the base 1 along the first direction. The nut block 22 is fixed on the base 21. The lead screw 23 extends along the first direction, with one end driving and connecting to the main shaft of the first motor 32, and the other end driving and connecting to the nut block 22. Thus, by the first motor 32 driving the lead screw 23 to rotate, the nut block 22 causes the base 21 and the aperture assembly 2 to move together along the first direction.

[0046] Further, please refer to Figures 1 to 2The aperture assembly 2 further includes a pressure plate 24, which is placed on the base 21 and fixedly connected to the base 1. It is understood that, in order to prevent the aperture assembly 2 from falling off the base 1 in the vertical direction when moving along the first direction, the aperture assembly 2 also includes the pressure plate 24, which is placed on the base 21 and fixedly connected to the base 1. The pressure plate 24 limits the position of the base 21 in the vertical direction, thereby ensuring that the aperture assembly 2 will not fall off the base 1 in the vertical direction when moving along the first direction, thus ensuring the reliability of the fundus camera during use.

[0047] In addition, please refer to Figures 1 to 2 The aperture assembly 2 further includes a mounting base 25, a second motor 26, and an aperture turntable 27; the mounting base 25 is fixed on the base body 21; the second motor 26 is mounted on the mounting base 25, and its main shaft passes through the mounting base 25 into the movable slide groove 11; the aperture turntable 27 is driven and connected to the main shaft of the second motor 26. It is understood that the aperture assembly 2 also includes the aperture turntable 27. The aperture turntable 27 is generally adjusted by rotation. Therefore, specifically, the aperture assembly 2 also includes the mounting base 25, the second motor 26, and the aperture turntable 27. The mounting base 25 is fixed on the base 21, and the second motor 26 is mounted on the mounting base 25, with its main shaft passing through the mounting base 25 into the movable slide groove 11. The aperture turntable 27 is driven and connected to the main shaft of the second motor 26. Thus, the aperture turntable 27 can rotate under the drive of the second motor 26, thereby ensuring the normal use of the diopter illumination compensation structure 100.

[0048] Further, please refer to Figures 1 to 2 The aperture assembly 2 further includes a first fixing piece 28 and a second fixing piece 29, which are respectively disposed on the two end faces of the aperture turntable 27 along the extension direction of the main shaft of the second motor 26. It is understood that the aperture turntable 27 is a relatively fragile component, and it is easily damaged during the reciprocating sliding process within the movable groove 11 in the first direction. Therefore, the aperture assembly 2 further includes the first fixing piece 28 and the second fixing piece 29, which are respectively disposed on the two end faces of the aperture turntable 27 along the extension direction of the main shaft of the second motor 26, thereby providing protection for the aperture turntable 27.

[0049] Further, please refer to Figures 1 to 2The diopter illumination compensation structure 100 further includes a limiting component 4, disposed on the base 1 and between the aperture assembly 2, to limit the travel of the aperture assembly 2 along the first direction. It is understood that in this embodiment, the first motor 32 drives the lead screw 23 to rotate, thereby causing the nut block 22 to move along the first direction with the seat 21, and thus causing the aperture assembly 2 to move along the first direction. Simultaneously, since the extension direction of the lead screw 23 driven by the first motor 32 points towards the second motor 26, to avoid interference between the first motor 32 and the second motor 26, i.e., to prevent the aperture assembly 2 from over-positioning, the diopter illumination compensation structure 100 further includes the limiting component 4, disposed on the base 1 and between the aperture assembly 2, to limit the travel of the aperture assembly 2 along the first direction, thereby protecting the first motor 32 and the second motor 26 from interference, and thus ensuring the reliability of the diopter illumination compensation structure 100.

[0050] Further, please refer to Figures 1 to 2 The limiting component 4 includes a limiting sensor 41 and a limiting detection piece 42. One of the limiting sensor 41 and the limiting detection piece 42 is disposed on the base 1 along a first direction, and the other is disposed on the aperture assembly 2. It is understood that, to prevent the aperture assembly 2 from over-positioning and causing interference between the first motor 32 and the second motor 26, the limiting component 4 specifically includes the limiting sensor 41 and the limiting detection piece 42. One of the limiting sensor 41 and the limiting detection piece 42 is disposed on the base 1 along the first direction, and the other is disposed on the aperture assembly 2. The limiting sensor 41 senses the relative position of the limiting detection piece 42, thereby alerting the user whether the position has over-positioned.

[0051] In addition, please refer to Figures 1 to 2 The diopter illumination compensation structure 100 also includes a cover plate 5, which is disposed on the base 1 relative to the movable slide 11 to close the movable slide 11. It is understood that the aperture turntable 27 is a relatively important component of the aperture assembly 2. To prevent damage to the aperture turntable 27, the diopter illumination compensation structure 100 also includes the cover plate 5, which is disposed on the base 1 relative to the movable slide 11 to close the movable slide 11. This prevents debris from entering the movable slide 11 and affecting the rotation of the aperture turntable 27, and also prevents external forces from damaging the aperture turntable 27, thereby further ensuring the reliability of the diopter illumination compensation structure 100.

[0052] This utility model also proposes a fundus camera, which includes the refractive power illumination compensation structure 100. The specific structure of the refractive power illumination compensation structure 100 is as described in the above embodiments. Since the fundus camera adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0053] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A diopter illumination compensation structure, applied to a fundus camera, characterized in that, The diopter illumination compensation structure includes: The base has a movable groove recessed on one end face; The aperture assembly is housed within the movable slide; and, A drive assembly is fixed on the base; the drive assembly includes a drive part that drives the aperture assembly to have a movable stroke in the movable slide along a first direction.

2. The diopter illumination compensation structure as described in claim 1, characterized in that, The driving component includes a first motor, which is fixed on the base and its main shaft is connected to the aperture assembly to drive the aperture assembly to reciprocate along a first direction. The drive unit includes the main shaft of the first motor.

3. The diopter illumination compensation structure as described in claim 2, characterized in that, The aperture assembly includes: The seat body is movably mounted on the base and has a travel relative to the base along a first direction; A nut block, fixedly mounted on the base; and, The lead screw extends along a first direction, with one end driving and connecting to the spindle of the first motor, and the other end driving and connecting to the nut block.

4. The diopter illumination compensation structure as described in claim 3, characterized in that, The aperture assembly also includes a pressure plate, which is placed on the base and fixedly connected to the base.

5. The diopter illumination compensation structure as described in claim 3, characterized in that, The aperture assembly also includes: Mounting base, fixedly mounted on the base body; A second motor, mounted on the mounting base, has its main shaft passing through the mounting base into the movable slide groove; and... The aperture turntable is driven by the main shaft of the second motor.

6. The diopter illumination compensation structure as described in claim 5, characterized in that, The aperture assembly further includes a first fixing plate and a second fixing plate, which are respectively disposed on the two end faces of the aperture turntable along the extension direction of the second motor spindle.

7. The diopter illumination compensation structure as described in claim 2, characterized in that, The diopter illumination compensation structure also includes a limiting component disposed on the base and between the aperture assembly, for limiting the movement of the aperture assembly along the first direction.

8. The diopter illumination compensation structure as described in claim 7, characterized in that, The limiting component includes a limiting sensor and a limiting detection piece, wherein one of the limiting sensor and the limiting detection piece is disposed on the base along a first direction, and the other is disposed on the aperture component.

9. The diopter illumination compensation structure as described in claim 1, characterized in that, The diopter illumination compensation structure also includes a cover plate, which is disposed on the base relative to the movable slide groove to close the movable slide groove.

10. A fundus camera, characterized in that, The fundus camera includes the refractive illumination compensation structure as described in any one of claims 1-9.

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