Eye model for observation by an oct instrument and an eye model positioning and adjusting device

Abstract

This invention relates to an eye model for OCT instrument observation, comprising a supporting shell, a supporting shell rear cover, a fixing pin, and an eye model; the supporting shell is rectangular in shape, with a circular observation window on the front and a rectangular opening on the rear; the front of the supporting shell rear cover has a groove that conforms to the shape of the eye model, and the supporting shell rear cover is assembled from back to front into the rectangular opening, with the groove partially enclosing the eye model; the front part of the eye model extends out of the observation window and is limited by the supporting shell; the upper and lower lens receiving slots are combined to form a lens mounting slot; the upper and lower image receiving slots of the optical eye model are combined to form an image mounting slot for displaying fundus patterns; the top and bottom of the supporting shell have rear fixing holes, so the corresponding part of the supporting shell rear cover has a through hole, and the supporting shell and the supporting shell rear cover are positioned and fixed by inserting the fixing pin from top to bottom into the rear fixing hole and the through hole.

Description

Technical Field

[0001] This invention relates to an eye model for OCT instrument observation and an eye model positioning and adjustment device, belonging to the field of eye model teaching technology. Background Technology

[0002] Optical coherence tomography (OCT) technology has been widely used in ophthalmic clinical diagnosis and scientific research due to its advantages such as non-invasiveness and high resolution. In the process of OCT instrument development, factory calibration, and routine maintenance testing, it is usually necessary to conduct repeated tests using a standard optical human eye model in order to objectively evaluate the instrument's imaging quality, field of view, and optical path alignment accuracy.

[0003] Currently, when testing eye models with OCT equipment and teaching with human eye models, the lack of dedicated, adaptable clamping and adjustment fixtures means that testers often have to simply place or barely fix the physical eye model (or along with the face model) onto the chin rest, forehead support, or moving platform of the OCT instrument. This method has significant drawbacks:

[0004] Firstly, the lenses and images of the eye model cannot be replaced, which causes inconvenience in ophthalmology teaching when using OCT instruments to observe the eye model due to the need to replace the entire eye model.

[0005] Secondly, the fixation is extremely unstable; even a slight vibration can cause the optical path to shift, severely affecting the accuracy of OCT interferometric imaging.

[0006] Third, when OCT instruments are used clinically, scanning tests are required for the patient's left and right eyes separately. When teaching human eye models, it is also often necessary to simulate scanning tests for the left and right eyes separately. However, the existing fixation method requires the tester to manually disassemble the eye model and find a new focus on the other side when simulating "binocular switching". The operation is extremely cumbersome, the positioning accuracy is poor, resulting in low testing efficiency, which greatly increases the time cost of research and development and calibration. It also affects the convenience of teaching eye models observed by OCT instruments. Summary of the Invention

[0007] The purpose of this invention is to provide an eye model for OCT instrument observation and its positioning and adjustment device, so as to solve the problem of teaching inconvenience caused by the inability to change lenses and images in the existing technology; as well as the technical problems of unstable fixation on the OCT instrument, cumbersome left and right eye switching adjustment, and low positioning accuracy.

[0008] The present invention adopts the following technical solution:

[0009] An eye model for OCT instrument observation includes a supporting shell 3, a supporting shell rear cover 1, a fixing pin 2, and an eye model. The supporting shell 3 is rectangular in shape, with a circular observation window 303 on the front and a rectangular opening on the rear. The supporting shell rear cover 1 has a groove 102 on its front side that conforms to the shape of the eye model. The supporting shell rear cover 1 is assembled from back to front into the rectangular opening, and the groove 102 partially encloses the eye model. The front part of the eye model extends out of the observation window 303 and is limited by the supporting shell 3. The eye model can rotate spherically within the groove 102. The eye model includes an upper hemisphere 10 and a lower hemisphere 11. The upper hemisphere 10 has an upper lens receiving groove 1002 at its front. The lower hemisphere 11 of the optical eye model is provided with a lower lens receiving groove 1003 at a corresponding position; the upper lens receiving groove 1002 and the lower lens receiving groove 1003 are combined to form a lens mounting groove; the upper hemisphere 10 of the optical eye model is provided with an upper image receiving groove 1003 at the rear, and the lower hemisphere 11 of the optical eye model is provided with a lower image receiving groove 1103 at a corresponding position; the upper image receiving groove 1003 and the lower image receiving groove 1103 are combined to form an image mounting groove for displaying the fundus pattern; the top and bottom of the supporting shell 3 are provided with rear fixing holes 301, so the corresponding part of the rear cover 1 of the supporting shell is provided with a long through hole, and the fixing pin 2 is inserted from top to bottom into the rear fixing hole 301 and the long through hole to position and fix the supporting shell 3 and the rear cover 1 of the supporting shell.

[0010] Preferably, different lenses are installed and replaced through the lens mounting slot, and different fundus pattern images are installed and replaced through the image mounting slot.

[0011] Preferably, the eye model is spherical in shape.

[0012] A positioning and adjustment device for an eye model used in OCT instrument observation, as described above, further includes a slide rail mating seat 12 and a clamping assembly. The clamping assembly includes a pair of guide rail clamping devices, each including an integral main crossbeam 4 and a clamping structure. The main crossbeam 4 is provided with a guide groove 401 that can slide and engage with the slide rail mating seat 12. The clamping structure includes a pair of annular fixed parts and annular movable parts 6. The annular fixed parts are fixedly connected to the main crossbeam 4, and the annular movable parts 6 are connected to the annular fixed parts at one end by a hinge and at the other end by a fixed buckle. An adjusting bolt 8 is axially screwed into the annular movable part 6, and an annular pressure block 7 is connected to the end of the adjusting bolt. The clamping structure is used to fit the support rod of the OCT instrument, and the clamping structure and the support rod of the OCT instrument are positioned and fixed by rotating the adjusting bolt 8. After the pair of guide rail clamping devices and the support rod of the OCT instrument are positioned and fixed, the distance between adjacent ends of the pair of main crossbeams 4 is less than the length of the slide rail mating seat 12.

[0013] Preferably, the annular fixed part and the annular movable part 6 are hinged together by a fixing screw 5.

[0014] Preferably, the arc-shaped pressure block 7 is connected to a limiting guide post 701, which is parallel to the adjusting bolt 8 and passes through the annular movable part 6, for preventing rotation and guiding.

[0015] Furthermore, the outer layer of the arc-shaped pressure block 7 is also provided with an arc-shaped clamping pad 702 to prevent scratching the surface of the OTC instrument support rod.

[0016] Furthermore, the annular movable part 6 and the annular fixed part are detachably connected by a hinge mechanism, wherein the hinge structure 9 includes an upper movable section 901 and a lower movable section 902, which together form the fixing buckle.

[0017] Furthermore, different lengths of the slide rail mating seat 12 are selected to adapt to the lateral sliding range of the bearing housing 3. The shorter the length of the slide rail mating seat 12, the longer the lateral sliding range.

[0018] The beneficial effects of this invention are as follows:

[0019] 1) The lenses and images of the eye model can be replaced (especially in ophthalmology teaching). By using OCT instruments to observe the eye model and changing its position (simulating another eye), different specifications of eye models can be achieved by changing the lenses or images, avoiding the inconvenience and inaccurate positioning caused by replacing the entire eye model.

[0020] 2) The eye model is accurately positioned and reliably fixed, which can completely avoid the problem that even slight vibrations can cause optical path deviations that affect the accuracy of OCT interferometric imaging;

[0021] 3) When simulating “binocular switching”, the tester does not need to manually disassemble the eye model and find a new focus on the other side, which greatly simplifies the operation and improves the testing efficiency. This also reduces the time cost of research and development and calibration, and improves the convenience of teaching eye models observed by OCT instruments.

[0022] 4) Stable clamping and strong adaptability: The ring-shaped clamping components at both ends can securely lock the entire device onto the standard vertical support of the OCT instrument (such as the jaw support lifting rod); the knob locking mechanism with the arc-shaped pressure block and adjusting bolt is easy to operate and can adapt to a certain range of support rod diameter tolerances.

[0023] 5) Highly efficient and accurate switching between left and right eyes: The main beam design with guide rails allows testers to complete the OCT scan of one eye model without disassembling any fixing devices. They can simply push the central eye model component to move it along the rail to the other side, instantly simulating the difference in pupil distance between normal human eyes and quickly completing the scan alignment of the other eye, greatly improving testing and calibration efficiency.

[0024] 6) Good structural protection: The eye model is encapsulated inside a square supporting shell, with only the necessary corneal observation window exposed. This not only ensures unobstructed entry of the OCT beam, but also effectively prevents the fragile high-precision optical eye model from being damaged or contaminated by dust during daily operation or bumps. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the positioning and adjustment device for the eye model used in OCT instrument observation according to the present invention.

[0026] Figure 2 This is a schematic diagram of the clamping assembly.

[0027] Figure 3 This is a schematic diagram showing the housing and slide rail assembly integrated into one unit.

[0028] Figure 4 This is a structural diagram of the back cover supporting the outer shell.

[0029] Figure 5 This is a cross-sectional view of the eye model (together with the sliding mating seat) used in OCT instrument observation according to the present invention.

[0030] Figure 6 This is a cross-sectional view of the fixed connection part on the side of the load-bearing shell.

[0031] Figure 7 This is a schematic diagram of the frontal view of an optical eye model.

[0032] Figure 8 This is a schematic diagram of the cross-sectional structure of an optical eye model.

[0033] Explanation of the labels in the diagram:

[0034] 1-Back cover supporting the outer casing; 101-Front cover fixing hole; 102-Optical eye model groove;

[0035] 2-Fixing pin;

[0036] 3-Front part of the supporting shell; 301-Rear fixing hole; 303-Observation window;

[0037] 4-Main crossbeam; 401-Guide groove;

[0038] 5-Fixing screws;

[0039] 6-Circular movable part;

[0040] 7-Arc-shaped pressure block; 701-Limiting guide post; 702-Arc-shaped clamping pad;

[0041] 8-Adjusting bolt;

[0042] 9-Hinge mechanism; 901-Upper movable joint of the hinge; 902-Lower fixed joint of the hinge;

[0043] 10 - Upper hemisphere of the eye model; 1001 - Upper half locking hole; 1002 - Upper half lens receiving slot; 1003 - Upper half image receiving slot;

[0044] 11-Lower hemisphere of the eye model; 1101-Lower half locking hole; 1102-Lower half lens receiving groove; 1103-Lower half image receiving groove.

[0045] 12-Slide rail mating seat. Detailed Implementation

[0046] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0047] See Figure 1 , 5 An eye model for observation by an OCT instrument includes a support shell 3, a support shell rear cover 1, a fixing pin 2, and an eye model.

[0048] See Figure 3 The supporting outer shell 3 is rectangular in shape, with a circular observation window 303 on the front and a rectangular opening on the rear.

[0049] See Figure 4-5 The front side of the rear cover 1 of the supporting shell has a groove 102 that is similar in shape to the eye model. The rear cover 1 of the supporting shell is assembled into the rectangular opening from back to front and the groove 102 partially encloses the eye model.

[0050] See Figure 3 The front portion of the eye model extends beyond the observation window 303 and is limited by the supporting shell 3; the eye model can achieve spherical rotation within the groove 102 (e.g., Figure 1 and 5 );

[0051] Combination Figure 1 , 5 7, 8, The eye model includes an upper hemisphere 10 and a lower hemisphere 11 of an optical eye model; the upper hemisphere 10 has an upper lens receiving groove 1002 at its front, and the lower hemisphere 11 has a corresponding lower lens receiving groove 1003; the upper lens receiving groove 1002 and the lower lens receiving groove 1003 are combined to form a lens mounting groove; the upper hemisphere 10 has an upper image receiving groove 1003 at its rear, and the lower hemisphere 11 has a corresponding lower image receiving groove 1103; the upper image receiving groove 1003 and the lower image receiving groove 1103 are combined to form an image mounting groove for displaying fundus patterns;

[0052] See Figure 3 , 4 6. The top and bottom of the supporting shell 3 are provided with rear fixing holes 301, so the corresponding part of the supporting shell rear cover 1 is provided with a long through hole. The fixing pin 2 is inserted from top to bottom into the rear fixing hole 301 and the long through hole to position and fix the supporting shell 3 and the supporting shell rear cover 1.

[0053] See Figure 5 , 8 Different lenses can be installed and replaced through the lens mounting slot, and different fundus pattern images can be installed and replaced through the image mounting slot.

[0054] In this embodiment, the eye model is spherical.

[0055] See Figure 1-2A positioning and adjustment device for an eye model used in OCT instrument observation, further comprising a slide rail mating seat 12 and a clamping assembly; the clamping assembly includes a pair of guide rail clamping devices, each guide rail clamping device comprising a main crossbeam 4 integrally connected to a clamping structure; the main crossbeam 4 is provided with a guide groove 401 that can slide and engage with the slide rail mating seat 12; the clamping structure includes a pair of annular fixed parts and annular movable parts 6, the annular fixed parts being fixedly connected to the main crossbeam 4, the annular movable parts 6 being connected to the annular fixed parts at one end via a hinge, and the other end being detachably connected via a fixing buckle; an adjusting bolt 8 is axially screwed into the annular movable part 6, and an annular pressure block 7 is connected to the end of the adjusting bolt; the clamping structure is used to fit onto the support rod of the OCT instrument, and the clamping structure and the support rod of the OCT instrument are positioned and fixed by rotating the adjusting bolt 8; after the pair of guide rail clamping devices and the support rod of the OCT instrument are positioned and fixed respectively, the distance between adjacent ends of the pair of main crossbeams 4 is less than the length of the slide rail mating seat 12.

[0056] It should be noted that, in the appendix Figure 1 The support rods of the OCT instrument are not shown in the image. Therefore, the positioning and adjustment device of this eye model needs to be used in conjunction with an OCT instrument that has a pair of upright support rods. In fact, most OCT instruments have a pair of support rods on both sides.

[0057] In this embodiment, the annular fixed part and the annular movable part 6 are hinged together by a fixing screw 5.

[0058] In this embodiment, see Figure 2 The arc-shaped pressure block 7 is connected to a limiting guide post 701. The limiting guide post 701 is parallel to the adjusting bolt 8 and passes through the annular movable part 6, and is used to prevent rotation and guide.

[0059] In this embodiment, the outer layer of the arc-shaped pressure block 7 is also provided with an arc-shaped clamping pad 702 to prevent scratching the surface of the OTC instrument support rod.

[0060] In this embodiment, the annular movable part 6 and the annular fixed part are detachably connected by a hinge mechanism, wherein the hinge structure 9 includes an upper movable section 901 and a lower movable section 902, which together form the fixing buckle.

[0061] See Figure 1 Different lengths of the slide rail mating seat 12 are selected to adapt to the lateral sliding range of the bearing housing 3. The shorter the length of the slide rail mating seat 12, the longer the lateral sliding range.

[0062] In this embodiment, the guide groove 401 has precise straightness; the guide groove 401 and the slide rail mating seat 12 have perfectly matched cross-sectional shapes, providing precise guidance for the lateral movement of the eye model.

[0063] The slide rail mating seat 12 of the bearing housing 3 is adapted to the guide groove 401 on the main crossbeam 4 (for example, a dovetail groove or an I-shaped slide rail can be used), so that the bearing housing assembly is limited on the main crossbeam 4 and can only move horizontally along the guide groove 401 without moving up and down or rotating around the axis.

[0064] Inside the housing 3, the upper hemisphere 10 and lower hemisphere 11 of the optical eye model are securely encapsulated. The optical eye model recess 102 in the rear cover 1 of the housing accommodates the optical eye model. The rear cover 1, which accommodates the optical eye model, is internally housed within the housing 3. The housing 3 and the rear cover 1 are positioned by a front fixing hole 101 and a rear cover fixing hole 301, respectively. A fixing pin 2 connects the front fixing hole 101 and the rear cover fixing hole 301. A circular observation window 303 is provided at the center of the front face of the housing. The mounting holes of the internal optical eye model protrude outwards from this observation window 303 or are fully exposed. This design allows the detection interference beam of the OCT instrument to directly enter the optical eye model, while the square housing provides excellent physical protection for the delicate internal optical components.

[0065] The clamping assembly is used to clamp and fix the entire testing system to the support rod of the OCT instrument (such as the bilateral lifting rods commonly used to place the patient's chin). Each clamping assembly includes an annular fixed part and an annular movable part 6 rigidly connected to the main crossbeam. The annular fixed part 6 is integrally formed with the end of the main crossbeam 4, ensuring rigidity under force. One end of the annular movable part 6 is connected to the annular fixed part via a hinge mechanism 9, allowing it to open and close like a crab claw.

[0066] To achieve clamping and locking functions, the clamping assembly is equipped with an adjustment mechanism. This mechanism includes an arc-shaped pressure block 7 and an adjusting bolt 8. The arc-shaped pressure block 7 passes laterally through the annular movable part 6. The adjusting bolt 8 is fixed at the outer end of the annular movable part 6, allowing the tester to rotate it manually. The top of the adjusting bolt 8 rests on the top of the arc-shaped clamping pad 702 of the arc-shaped pressure block 7, forming a mechanical limit and creating a sufficiently large notch to engage the vertical support rod of the OCT instrument. After engagement, the tester tightens the adjusting bolt 8 clockwise, causing the arc-shaped pressure block 7, which is limited in the annular movable part 6, to retract inward, thus tightly gripping the support rod together with the annular fixing part.

[0067] Usage process and working principle:

[0068] When calibrating the OCT instrument, the tester first loosens the knobs of the adjusting bolts 8 on both sides to open the clamping components on both sides. Then, the system is placed horizontally between the two support rods on both sides of the chin support of the OCT instrument, so that the support rods enter the clamping holes. Subsequently, the adjusting bolts 8 are tightened, and the system is then stably suspended and fixed in front of the OCT probe.

[0069] When aligning with the "right eye," the tester simply pushes the supporting shell of the eye model assembly by hand, sliding it to the right along the main beam 4 to the designated position. At this point, the OCT scanning beam can pass through the observation window 303 and align with the optical eye model for imaging testing. After completing the "right eye" test, without touching the clamping components on both sides, simply slide the supporting shell to the left by the corresponding physiological interpupillary distance to quickly complete the simulation test of the "left eye" position (at this time, the image of the fundus pattern in the lens mounting slot can be changed). This system simplifies the originally complex disassembly and realignment process into a single one-dimensional linear slide, significantly reducing adjustment time. During observation, the eye rotation angle can be controlled by controlling the locking holes to observe different perspectives.

[0070] The lenses and images in the eye model of this invention are replaceable (especially in ophthalmology teaching). When observing the eye model using an OCT instrument, after changing the position of the eye model (simulating another eye), different specifications of eye models can be achieved by changing the lenses or images, avoiding the inconvenience and inaccurate positioning problems caused by replacing the entire eye model. The eye model is accurately positioned and reliably fixed, completely avoiding the problem of light path shift caused by minor vibrations affecting the accuracy of OCT interferometric imaging. When simulating "binocular switching," the tester does not need to manually disassemble the eye model and find a new focus on the other side, greatly simplifying the operation and significantly improving testing efficiency. This also reduces the time cost of research and development and calibration, and improves the convenience of teaching eye models observed with OCT instruments. The clamping is stable and highly adaptable: the annular clamping components at both ends provide a very secure grip. The entire device is securely locked onto the standard vertical support (such as the chin support lifting rod) of the OCT instrument; the knob locking mechanism, which combines the arc-shaped pressure block with the adjusting bolt, is easy to operate and can accommodate a certain range of support rod diameter tolerances; efficient and precise switching between left and right eyes: adopting a main crossbeam design with guide rails, after completing the OCT scan of one eye model, the tester does not need to disassemble any fixing device, but only needs to push the central eye model component to move it along the slide rail to the other side, which can instantly simulate the difference in pupillary distance between normal human eyes and quickly complete the scanning and alignment of the other eye, greatly improving the efficiency of testing and calibration; good structural protection: the eye model is encapsulated inside a square carrier shell, with only the necessary corneal observation window exposed, which not only ensures unobstructed entry of the OCT beam, but also effectively avoids damage or dust contamination to the fragile high-precision optical eye model during daily operation and impacts.

[0071] The above are preferred embodiments of the present invention. Those skilled in the art can make various modifications or improvements based on these embodiments. Without departing from the overall concept of the present invention, such modifications or improvements should fall within the scope of protection claimed by the present invention.

Claims

1. An eye model for observation using OCT instruments, characterized in that: Includes a supporting shell (3), a supporting shell rear cover (1), a fixing pin (2), and an eye model; The supporting shell (3) is rectangular in shape, with a circular observation window (303) on the front and a rectangular opening on the rear. The front side of the rear cover (1) of the supporting shell has a groove (102) that is similar in shape to the eye model. The rear cover (1) of the supporting shell is assembled into the rectangular opening from back to front and the groove (102) partially encloses the eye model. The front part of the eye model extends out of the observation window (303) and is limited by the supporting shell (3). The eye model can rotate spherically within the groove (102). The eye model includes an upper hemisphere (10) of an optical eye model and a lower hemisphere (11) of an optical eye model. The upper hemisphere (10) of the optical eye model is provided with an upper lens receiving groove (1002) at the front, and the lower hemisphere (11) of the optical eye model is provided with a lower lens receiving groove (1003) at the corresponding position; the upper lens receiving groove (1002) and the lower lens receiving groove (1003) are combined to form a lens mounting groove; The upper hemisphere (10) of the optical eye model is provided with an upper half image receiving slot (1003) at the rear, and the lower hemisphere (11) of the optical eye model is provided with a lower half image receiving slot (1103) at the corresponding position; the upper half image receiving slot (1003) and the lower half image receiving slot (1103) are combined to form an image mounting slot for displaying the fundus pattern; The top and bottom of the supporting shell (3) are provided with rear fixing holes (301), so the corresponding part of the rear cover (1) of the supporting shell is provided with a long through hole. The fixing pin (2) is inserted from top to bottom into the rear fixing hole (301) and the long through hole to position and fix the supporting shell (3) and the rear cover (1).

2. The eye model for OCT instrument observation as described in claim 1, characterized in that: Different lenses are installed and replaced using the lens mounting slot, and different fundus pattern images are installed and replaced using the image mounting slot.

3. The eye model for OCT instrument observation as described in claim 1, characterized in that: The eye model is spherical in shape.

4. A positioning and adjustment device for an eye model used in OCT instrument observation, as described in any one of claims 1-3, characterized in that: It also includes a slide rail mating seat (12) and a clamping assembly; The clamping assembly includes a pair of guide rail clamping devices, and the guide rail clamping devices include a main crossbeam (4) and a clamping structure that are integrated together. The main crossbeam (4) is provided with a guide groove (401) that can slide with the slide rail mating seat (12). The clamping structure includes a pair of annular fixed parts and annular movable parts (6). The annular fixed parts are fixedly connected to the main crossbeam (4). The annular movable parts (6) are connected to the annular fixed parts at one end by a hinge and at the other end by a fixed buckle. An adjusting bolt (8) is axially screwed into the annular movable part (6), and an annular pressure block (7) is connected to the end of the adjusting bolt. The clamping structure is used to fit into the support rod of the OCT instrument. The clamping structure and the support rod of the OCT instrument are positioned and fixed by rotating the adjusting bolt (8). After the pair of guide rail clamping devices and the support rod of the OCT instrument are positioned and fixed, the distance between the adjacent ends of the pair of main crossbeams (4) is less than the length of the slide rail mating seat (12).

5. The positioning and adjustment device for an eye model used in OCT instrument observation as described in claim 4, characterized in that: The annular fixed part and the annular movable part (6) are hinged together by a fixing screw (5).

6. The positioning and adjustment device for an eye model used in OCT instrument observation as described in claim 4, characterized in that: The arc-shaped pressure block (7) is connected to a limiting guide post (701), which is parallel to the adjusting bolt (8) and passes through the annular movable part (6) for anti-rotation and guidance.

7. The positioning and adjustment device for an eye model used in OCT instrument observation as described in claim 5, characterized in that: The outer layer of the arc-shaped pressure block (7) is also provided with an arc-shaped clamping pad (702).

8. The positioning and adjustment device for an eye model used in OCT instrument observation as described in claim 5, characterized in that: The annular movable part (6) and the annular fixed part are detachably connected by a hinge mechanism, wherein the hinge structure (9) includes an upper movable section (901) and a lower movable section (902), which together form the fixed buckle.

9. The positioning and adjustment device for an eye model used in OCT instrument observation as described in claim 5, characterized in that: Different lengths of the slide rail mating seat (12) are selected to adapt to the lateral sliding range of the bearing shell (3). The shorter the length of the slide rail mating seat (12), the longer the lateral sliding range.

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