Ophthalmic Instrument Testing Equipment and Methods

Abstract

This invention provides an ophthalmic instrument testing device and method, relating to the field of ophthalmic instrument testing technology. The ophthalmic instrument testing device includes: a focusing detection unit, an imaging detection unit, and a main unit; the focusing detection unit and the imaging detection unit are respectively connected to the main unit; the main unit has a beam splitter installed inside and a test interface for connecting to the ophthalmic instrument under test; the test interface, the beam splitter, and the focusing detection unit form a confocal detection optical path, and the imaging detection unit, the beam splitter, and the test interface form an imaging test optical path. Beam focusing is tested through the focusing detection unit, and fundus imaging is tested through the imaging detection unit. After confocal adjustment is completed in the focusing detection unit, imaging adjustment can be performed through the imaging detection unit, replacing human eye adjustment and alleviating the technical problems of time-consuming, labor-intensive, and inconsistent human eye adjustment.

Description

Technical Field

[0001] This invention relates to the field of ophthalmic instrument testing technology, and in particular to an ophthalmic instrument testing device and a method for testing ophthalmic instruments. Background Technology

[0002] For OCT (Optical Coherence Tomography) systems integrating confocal fundus imaging, it is necessary to debug and test whether the three beams of light—fundus image, OTC image, and fixation target—are confocal. If human eye detection and debugging are used, after confocal adjustment, the resolution is tested to confirm the instrument's performance. If the resolution does not meet the standard, the confocal adjustment needs to be readjusted, and this process is repeated until the resolution test result meets the standard. This debugging method increases debugging time, reduces debugging efficiency, is very taxing on the human eye, and the judgment method is relatively subjective, resulting in large differences in results, ultimately leading to reduced instrument consistency. Summary of the Invention

[0003] The purpose of this invention is to provide an ophthalmic instrument testing device and a method for testing ophthalmic instruments, which can replace the human eye in performing confocal and imaging adjustments on ophthalmic instruments.

[0004] In a first aspect, the ophthalmic instrument testing equipment provided by the present invention includes: a focusing detection unit, an imaging detection unit, a main unit, and a beam splitter; The focusing detection unit and the imaging detection unit are respectively connected to the main unit; The main unit is equipped with a beam splitter and has a test interface for connecting to the ophthalmic instrument being tested. The test interface, the beam splitter, and the focusing detection unit form a confocal detection optical path, and the imaging detection unit, the beam splitter, and the test interface form an imaging test optical path.

[0005] In conjunction with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein the focusing detection unit includes: a lens holder, a lens assembly, an adjustment ring, and an area array camera; The lens bracket is mounted on the main unit, the lens assembly is located in the optical path of the area array camera, and the lens assembly is mounted on the lens bracket; The adjustment ring is connected to the area array camera, and the adjustment ring is slidably connected to the lens support along the optical axis of the lens assembly.

[0006] In conjunction with the first possible implementation of the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the lens assembly includes: a lens barrel, a cemented doublet lens, and a lens retainer, the cemented doublet lens being mounted inside the lens barrel, and the lens retainer being connected inside the lens barrel to limit the position of the cemented doublet lens; The lens barrel has threads on its exterior and fits into the lens holder.

[0007] In conjunction with the first possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the optical axis of the lens assembly extends along the x-axis, and the lens support is connected to the main unit via a dual-axis adjustment frame; The dual-axis adjustment frame includes: a movable bracket, a first screw, and a second screw; The movable bracket is slidably connected to the main unit along the y-axis, and the first screw is installed on the main unit and is engaged with the movable bracket; The lens bracket is slidably connected to the movable bracket along the z-axis, and the second screw is installed on the movable bracket and cooperates with the lens bracket.

[0008] In conjunction with the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein the imaging detection unit includes: a resolution plate assembly, an imaging frame, and a light source; The light source is connected to the imaging frame, and the resolution plate assembly is slidably connected to the imaging frame to adjust the distance between the resolution plate assembly and the light source.

[0009] In conjunction with the fourth possible implementation of the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein the imaging machine is provided with a slot, the slot being opposite to the resolution plate assembly.

[0010] In conjunction with the fourth possible implementation of the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein a diffuser is mounted between the resolution plate assembly and the light source, and the diffuser is connected to the imaging frame.

[0011] In conjunction with the fourth possible implementation of the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein an imaging lens is mounted on the side of the resolution plate assembly facing away from the light source, and the imaging lens is connected to the main unit or the imaging frame.

[0012] In conjunction with the fourth possible implementation of the first aspect, the present invention provides an eighth possible implementation of the first aspect, wherein the resolution plate assembly includes: a resolution plate lens barrel, a resolution plate body, and a pressure ring; The resolution plate body is installed inside the resolution plate lens barrel, and the pressure ring is connected to the resolution plate lens barrel to limit the resolution plate body.

[0013] Secondly, the ophthalmic instrument testing method provided by the present invention uses the ophthalmic instrument testing equipment described in the first aspect, and includes the following steps: The ophthalmic instrument to be tested is installed on the main unit, and the ophthalmic instrument to be tested is facing the test interface; Adjust the focusing detection unit to achieve the minimum light spot size; The image is received by the ophthalmic instrument under test, and the imaging detection unit is adjusted until the resolution acquired by the ophthalmic instrument under test meets the preset standard.

[0014] The embodiments of the present invention bring the following beneficial effects: the focusing detection unit and the imaging detection unit are respectively connected to the main unit. The main unit is equipped with a beam splitter and has a test interface. The test interface is connected to the ophthalmic instrument under test. The test interface, the beam splitter and the focusing detection unit form a confocal detection optical path. The imaging detection unit, the beam splitter and the test interface form an imaging test optical path. After the confocal adjustment is completed by the focusing detection unit, the imaging adjustment can be performed by the imaging detection unit. This can replace the human eye for adjustment and alleviate the technical problems of time-consuming, labor-intensive and poor consistency of human eye adjustment.

[0015] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an ophthalmic instrument testing device provided in an embodiment of the present invention; Figure 2 Explosion of ophthalmic instrument testing equipment provided in the embodiments of the present invention Figure 1 ; Figure 3 Explosion of ophthalmic instrument testing equipment provided in the embodiments of the present invention Figure 2 ; Figure 4 An exploded view of the focusing detection unit of the ophthalmic instrument testing device provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the focusing detection unit of the ophthalmic instrument testing device provided in an embodiment of the present invention; Figure 6 An exploded view of the imaging detection unit of the ophthalmic instrument testing device provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the imaging detection unit of an ophthalmic instrument testing device provided in an embodiment of the present invention.

[0018] Icons: 100-Focusing detection unit; 110-Lens holder; 120-Lens assembly; 121-Lens barrel; 122-Cemented doublet lens; 123-Lens retaining ring; 130-Adjusting ring; 131-Second locking threaded hole; 140-Area array camera; 150-Dual-axis adjustment frame; 151-Moving bracket; 152-First screw; 153-Second screw; 154-First sliding shaft; 155-Second sliding shaft; 200- Imaging detection unit; 210-Resolution plate assembly; 211-Resolution plate lens barrel; 212-Resolution plate body; 213-Pressure ring; 214-Lens barrel adjustment hole; 220-Imaging frame; 221-Slot; 222-First locking threaded hole; 230-Light source; 240-Diffuser; 250-Imaging lens; 300-Main unit; 301-Test interface; 302-Third locking threaded hole; 310-Spectrometer. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities in the International System of Units (SI), or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, the ophthalmic instrument testing device provided in this embodiment of the invention includes: a focusing detection unit 100, an imaging detection unit 200, and a main unit 300; the focusing detection unit 100 and the imaging detection unit 200 are respectively connected to the main unit 300; a beam splitter 310 is installed inside the main unit 300, and the main unit 300 has a test interface 301, which is used to connect to the ophthalmic instrument under test; the test interface 301, the beam splitter 310, and the focusing detection unit 100 form a confocal detection optical path, and the imaging detection unit 200, the beam splitter 310, and the test interface 301 form an imaging test optical path.

[0023] Specifically, the beam splitter 310 uses components such as a beam splitter prism. The beam splitter 310 is secured by screws installed in the third locking threaded hole 302, thus fixing its position within the main unit 300. The ophthalmic instrument under test interfaces with the test interface 301 of the main unit 300. By adjusting the focusing detection unit 100, the OCT (Optical Coherence Tomography), LSO (Laser Scanning Ophthalmoscopy), and the spot size of the fixation target of the acquisition instrument can be adjusted until the spot size is minimized, achieving beam confocality. After confocal adjustment, the imaging detection unit 200 is adjusted until the resolution acquired by the ophthalmic instrument under test meets the preset standard, thus continuously achieving the confocal and imaging system adjustment goals. It can replace the human eye, combining beam focusing testing and fundus imaging testing functions, helping to improve the consistency of the ophthalmic instrument under test.

[0024] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, in this embodiment of the invention, the focusing detection unit 100 includes: a lens holder 110, a lens assembly 120, an adjustment ring 130, and an area array camera 140; the lens holder 110 is mounted on the main unit 300, the lens assembly 120 is located in the optical path of the area array camera 140, and the lens assembly 120 is mounted on the lens holder 110; the adjustment ring 130 is connected to the area array camera 140, and the adjustment ring 130 is slidably connected to the lens holder 110 along the optical axis of the lens assembly 120.

[0025] The adjusting ring 130 can slide relative to the lens holder 110 along the x-axis. It can be locked in place by a screw fastened in the second locking threaded hole 131. The adjusting ring 130 is threaded into the area array camera 140. The distance between the area array camera 140 and the lens assembly 120 can be adjusted via the sliding joint ring 130. The area array camera 140 measures the spot size of the OCT, LSO, and fixed target. When the spot size of all three beams is minimized at the same position, it can be determined that the three beams are confocal.

[0026] Furthermore, the lens assembly 120 includes: a lens barrel 121, a cemented doublet lens 122, and a lens retainer 123. The cemented doublet lens 122 is installed inside the lens barrel 121, and the lens retainer 123 is connected inside the lens barrel 121 to limit the cemented doublet lens 122. The lens barrel 121 has threads on its exterior and is fitted to the lens holder 110.

[0027] The lens barrel 121 and the lens holder 110 are designed with tolerances to ensure that the lens barrel 121 can slide relative to the lens holder 110 without significant wobble, thereby ensuring the radially stable positioning of the cemented doublet lens 122. The lens barrel 121 and the lens holder 110 are threaded together, and the installation position of the lens assembly 120 in the lens holder 110 can be adjusted by rotating the lens barrel 121.

[0028] Furthermore, the optical axis of the lens assembly 120 extends along the x-axis, and the lens holder 110 is connected to the main unit 300 via a dual-axis adjustment frame 150. The dual-axis adjustment frame 150 includes a movable bracket 151, a first screw 152, and a second screw 153. The movable bracket 151 is slidably connected to the main unit 300 along the y-axis, the first screw 152 is mounted on the main unit 300, and the first screw 152 cooperates with the movable bracket 151. The lens holder 110 is slidably connected to the movable bracket 151 along the z-axis, the second screw 153 is mounted on the movable bracket 151, and the second screw 153 cooperates with the lens holder 110.

[0029] Specifically, the first sliding shaft 154 is installed on the main unit 300 and extends along the y-axis. The movable bracket 151 can be adjusted to move along the y-axis by rotating the first screw 152. The second sliding shaft 155 is installed on the movable bracket 151. The lens bracket 110 can be adjusted to move along the z-axis by rotating the second screw 153, thereby adjusting the position of the lens assembly 120 on the xy plane, so that the lens assembly 120 is coaxial with the optical axis of the area array camera 140.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, the imaging detection unit 200 includes a resolution plate assembly 210, an imaging frame 220, and a light source 230. The light source 230 is connected to the imaging frame 220, and the resolution plate assembly 210 is slidably connected to the imaging frame 220 to adjust the distance between the resolution plate assembly 210 and the light source 230. By adjusting the movement of the resolution plate assembly 210 relative to the imaging frame 220 along the y-axis, and by locking the resolution plate assembly 210 in the first locking threaded hole 222, the position of the resolution plate assembly 210 located between the light source 230 and the imaging lens 250 can be adjusted, thereby achieving imaging resolution adjustment.

[0031] Furthermore, the imaging frame 220 is provided with a slot 221, which is opposite to the resolution board assembly 210.

[0032] Specifically, the resolution plate assembly 210 is provided with a lens barrel adjustment hole 214. A screwdriver or tweezers or other pointed tools are inserted into the lens barrel adjustment hole 214 through the slot 221, thereby adjusting the movement of the resolution plate assembly 210 relative to the imaging frame 220 along the y-axis.

[0033] Furthermore, a diffuser 240 is installed between the resolution plate assembly 210 and the light source 230. The diffuser 240 is connected to the imaging frame 220. The diffuser 240 ensures that the light from the light source 230 is evenly distributed on the resolution plate assembly 210.

[0034] Furthermore, an imaging lens 250 is mounted on the side of the resolution panel assembly 210 away from the light source 230, and the imaging lens 250 is connected to the main unit 300 or the imaging frame 220.

[0035] The imaging lens 250 can be mounted on the main unit 300 or the imaging frame 220. By adjusting the resolution plate assembly 210 to move relative to the imaging frame 220 along the y-axis, the distance between the resolution plate assembly 210 and the imaging lens 250 can be adjusted.

[0036] Furthermore, the resolution plate assembly 210 includes: a resolution plate lens barrel 211, a resolution plate body 212, and a retaining ring 213; the resolution plate body 212 is installed inside the resolution plate lens barrel 211, and the retaining ring 213 is connected to the resolution plate lens barrel 211 to limit the resolution plate body 212.

[0037] Specifically, the pressure ring 213 is threaded into the resolution plate lens barrel 211, thereby fixing the resolution plate body 212 along the axial direction of the resolution plate lens barrel 211. The screw installed in the first locking threaded hole 222 can abut against the resolution plate lens barrel 211, thereby locking the position of the resolution plate assembly 210.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the ophthalmic instrument testing method provided in this embodiment of the invention uses the ophthalmic instrument testing equipment described in the above embodiments and includes the following steps: Install the ophthalmic instrument to be tested on the main unit 300, and make the ophthalmic instrument to be tested face the test interface 301; Adjust the focusing detection unit 100 to achieve the minimum size of the light spot; The image is received by the ophthalmic instrument under test, and the imaging detection unit 200 is adjusted until the resolution acquired by the ophthalmic instrument under test meets the preset standard.

[0039] In this embodiment of the invention, the focusing detection unit 100 is adjusted first, followed by the imaging detection unit 200. This allows for the initial confocal calibration, followed by adjustment of the distance between the resolution plate assembly 210 and the imaging lens 250. The image is then reflected by the beam splitter 310 and received by the instrument's LSO camera. The resolution result is used to determine whether the resolution meets the requirements. Once the acquired resolution result meets the instrument's requirements, the goal of continuously calibrating the confocal and imaging system is achieved.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ophthalmic instrument testing device, characterized in that, include: Focusing detection unit (100), imaging detection unit (200) and main unit (300); The focusing detection unit (100) and the imaging detection unit (200) are respectively connected to the host unit (300); The host unit (300) is equipped with a beam splitter (310), and the host unit (300) has a test interface (301) for connecting to the ophthalmic instrument being tested. The test interface (301), the beam splitter (310), and the focusing detection unit (100) form a confocal detection optical path, and the imaging detection unit (200), the beam splitter (310), and the test interface (301) form an imaging test optical path. The focusing detection unit (100) includes: a lens bracket (110), a lens assembly (120), an adjustment ring (130), and an area array camera (140); the lens bracket (110) is mounted on the main unit (300), the lens assembly (120) is located in the optical path of the area array camera (140), and the lens assembly (120) is mounted on the lens bracket (110); the adjustment ring (130) is connected to the area array camera (140), and the adjustment ring (130) is slidably connected to the lens bracket (110) along the optical axis of the lens assembly (120); the area array camera (140) measures the spot size of the OCT, LSO, and fixation target of the ophthalmic instrument under test, and the three beams can be judged to be confocal when the spot size of the three beams is at the same position. The imaging detection unit (200) includes: a resolution plate assembly (210), an imaging frame (220), and a light source (230); the light source (230) is connected to the imaging frame (220), and the resolution plate assembly (210) is slidably connected to the imaging frame (220) to adjust the distance between the resolution plate assembly (210) and the light source (230); the image is received by the ophthalmic instrument under test, and the resolution is judged to meet the requirements based on the collected resolution results.

2. The ophthalmic instrument testing equipment according to claim 1, characterized in that, The lens assembly (120) includes: a lens barrel (121), a cemented doublet lens (122), and a lens retainer (123). The cemented doublet lens (122) is installed inside the lens barrel (121), and the lens retainer (123) is connected inside the lens barrel (121) to limit the position of the cemented doublet lens (122). The lens barrel (121) has threads on its outside and is fitted to the lens holder (110).

3. The ophthalmic instrument testing equipment according to claim 1, characterized in that, The optical axis of the lens assembly (120) extends along the x-axis, and the lens bracket (110) is connected to the main unit (300) via a dual-axis adjustment frame (150). The dual-axis adjustment frame (150) includes: a movable bracket (151), a first screw (152), and a second screw (153); The movable bracket (151) is slidably connected to the main unit (300) along the y-axis, the first screw (152) is installed on the main unit (300), and the first screw (152) is engaged with the movable bracket (151). The lens bracket (110) is slidably connected to the movable bracket (151) along the z-axis, the second screw (153) is installed on the movable bracket (151), and the second screw (153) is engaged with the lens bracket (110).

4. The ophthalmic instrument testing equipment according to claim 1, characterized in that, The imaging frame (220) is provided with a slot (221) which is opposite to the resolution panel assembly (210).

5. The ophthalmic instrument testing equipment according to claim 4, characterized in that, A diffuser (240) is installed between the resolution plate assembly (210) and the light source (230), and the diffuser (240) is connected to the imaging frame (220).

6. The ophthalmic instrument testing equipment according to claim 1, characterized in that, An imaging lens (250) is mounted on the side of the resolution panel assembly (210) away from the light source (230), and the imaging lens (250) is connected to the main unit (300) or the imaging frame (220).

7. The ophthalmic instrument testing equipment according to claim 1, characterized in that, The resolution plate assembly (210) includes: a resolution plate lens barrel (211), a resolution plate body (212), and a retaining ring (213). The resolution plate body (212) is installed inside the resolution plate lens barrel (211), and the pressure ring (213) is connected to the resolution plate lens barrel (211) to limit the resolution plate body (212).

8. A method for testing ophthalmic instruments, characterized in that, The ophthalmic instrument testing method uses the ophthalmic instrument testing equipment according to any one of claims 1-7, and includes the following steps: The ophthalmic instrument to be tested is installed on the main unit (300), and the ophthalmic instrument to be tested is facing the test interface (301). Adjust the focusing detection unit (100) to achieve the minimum light spot size; The image is received by the ophthalmic instrument under test, and the imaging detection unit (200) is adjusted until the resolution acquired by the ophthalmic instrument under test meets the preset standard.

Images