Biological eye measuring light path layout and eye measuring instrument

Abstract

The utility model relates to a biological eye measuring light path layout and an eye measuring instrument. The biological eye measuring light path layout comprises a light source assembly; the light path switching assembly is arranged on a light path of the light source assembly, the light source assembly emits a light beam, the light beam reaches the light path switching assembly, and the light beam is transmitted or reflected at the light path switching assembly so as to switch the light path direction; the first light module is arranged on a light path of the light source assembly; the second light module is arranged on a light path of the light source assembly; the light path switching assembly is arranged, and the driving motor in the light path switching assembly is used for driving the reflector assembly and the transmitting mirror assembly to rotate, so that one of the reflector assembly and the transmitting mirror assembly is selected to be in contact with a light beam emitted by the light source assembly and is reflected or transmitted, and then the light beam is respectively shot into the first light module and the second light module; and the anterior segment and the posterior segment are subjected to irradiation measurement, so that the convenience of switching measurement optical paths of the anterior segment and the posterior segment is improved.

Description

Technical Field

[0001] This application relates to the field of eye measurement technology, and in particular to a biological eye measurement optical path layout and eye measurement instrument. Background Technology

[0002] Cataract surgery, corneal refractive surgery, and effective prevention and treatment of myopia in adolescents all require precise measurement of multiple eye parameters, such as the curvature of the anterior and posterior surfaces of the cornea, corneal thickness, anterior chamber depth, lens thickness, curvature of the anterior and posterior surfaces of the lens, axial length, white-to-white distance, and pupil diameter.

[0003] Currently, the above-mentioned eye parameters are generally measured using optical coherence tomography (OCT). OCT is a non-invasive imaging technique that uses the interference phenomenon of low-coherence light sources to obtain high-resolution cross-sectional images of biological tissues. It plays an important role in the diagnosis and monitoring of various eye diseases, such as macular degeneration, glaucoma, and diabetic retinopathy.

[0004] In ophthalmology, OCT technology can be used for imaging of the anterior segment (cornea, anterior chamber angle, lens, etc.) and the posterior segment (retina and choroid). Existing spectral OCT can switch between scanning the anterior and posterior segments of the examined eye to determine the eye parameters, but this requires the use of multiple switching structures, making the operation relatively complex and increasing maintenance costs for the equipment later. Utility Model Content

[0005] This application provides a biological eye measurement optical path layout and an eye measurement instrument, which can solve the problems of complex switching structure and high maintenance cost of existing measurement equipment based on OCT technology.

[0006] The technical solution of this application is as follows: a biological eye measurement optical path layout, comprising:

[0007] Light source components;

[0008] An optical path switching component is disposed in the optical path of the light source component. A light beam emitted from the light source component reaches the optical path switching component, and the light beam undergoes transmission or reflection at the optical path switching component to switch the direction of the optical path. The optical path switching component includes:

[0009] The mirror assembly, the transmission mirror assembly, and the drive motor are provided, wherein the mirror assembly and the transmission mirror assembly are both mounted on the drive shaft of the drive motor.

[0010] The first optical module is disposed in the optical path of the light source assembly. When the light beam is reflected, it receives and conducts the light beam so that the light beam enters the posterior segment of the eye.

[0011] The second optical module is disposed in the optical path of the light source assembly. When the light beam is transmitted, it receives and conducts the light beam, so that the light beam enters the anterior segment of the eye.

[0012] A receiving module is disposed in the optical path of the light source assembly and is used to receive and transmit the light beam emitted from the first optical module or the second optical module.

[0013] The light source component emits a light beam, which is transmitted or reflected at the optical path switching component and either enters the first optical module or the second optical module and is then transmitted out. The receiving module receives the light beam and transmits it out to measure the posterior or anterior segment of the eye.

[0014] By adopting the above scheme, and by setting up an optical path switching component, the internal drive motor drives the reflector component and the transmission mirror component to rotate, so that one of the reflector component and the transmission mirror component contacts the light beam emitted by the light source component and reflects or transmits it. Then, the light beam is respectively taken into the first optical module and the second optical module to illuminate and measure the anterior segment and posterior segment of the eye, which improves the convenience of switching the optical path for measuring the anterior segment and posterior segment of the eye.

[0015] In one embodiment of this application, the light source assembly includes a light source disposed along the optical path direction, the light source being disposed above the optical path switching assembly for directing a light beam into the optical path switching assembly.

[0016] In one embodiment of this application, the reflector assembly includes two reflectors arranged circumferentially along the drive shaft of the drive motor and symmetrically mounted thereon. Two mounting gaps are formed between the two reflectors. The light beam undergoes a first reflection at one of the reflectors, is transmitted through the first optical module, undergoes a second reflection at the other reflector, and enters the receiving module.

[0017] The transmission mirror assembly includes two transmission mirrors. The two reflectors are respectively assembled in the two assembly gaps and are connected and fixed to the drive shaft of the drive motor. The light beam is transmitted once at one of the transmission mirrors, transmitted through the second optical module, and then transmitted a second time at the other transmission mirror before entering the receiving module.

[0018] By adopting the above scheme, when the light beam emitted by the light source is switched using the optical path switching component, the drive motor drives the reflector assembly and the transmission mirror assembly set on its drive shaft to rotate, so that one of them contacts the light beam. Since both the reflector assembly and the transmission mirror assembly are equipped with two symmetrical reflectors and transmission mirrors, the light beam is incident on one side of the drive shaft and is emitted or transmitted. When it is emitted from the other side, it can also be reflected or transmitted. This ensures that the optical path can be switched conveniently, and that there is no interference between the two optical paths.

[0019] In one embodiment of this application, the first optical module includes a second reflector module, an optical path adjustment reflector, and a diopter adjustment lens arranged along the optical path direction. The second reflector module, the optical path adjustment reflector, and the diopter adjustment lens are all disposed above the optical path switching component. The diopter adjustment lens can adjust and compensate according to the refractive state of the human eye by moving back and forth along the optical path direction.

[0020] By adopting the above technical solution, after the light beam is reflected and enters the first optical module, the optical path adjustment reflector can move back and forth in the optical path direction according to the actual specific position of the posterior segment of the eye as needed, so as to image different positions of the posterior segment of the eye. At the same time, the refractive adjustment lens is used to move and adjust the focus, and adjust and compensate according to the refractive state of different human eyes, so that after the device adjusts and compensates the focus of the light beam, it can accurately measure the specific position of the posterior segment of the eye.

[0021] In one embodiment of this application, the second optical module includes a second and a third optical path adjustment mirror module arranged along the optical path direction. The second and third optical path adjustment mirror modules are disposed below the optical path switching component and can guide the light beam entering one side of the optical path switching component to the other side of the optical path switching component after optical path adjustment.

[0022] By adopting the above scheme, after the light beam passes through the transmission and enters the second optical module, the optical path adjustment mirror 2 can move back and forth in the optical path direction according to the actual specific position of the anterior segment imaging as needed, so as to image the display cornea, anterior chamber and lens of the anterior segment, thereby enabling the device to accurately measure the specific position of the anterior segment.

[0023] In one embodiment of this application, the receiving module includes an objective lens disposed along the optical path direction. The objective lens is disposed above the optical path switching component and can receive and focus the light beam emitted from the first optical module or the second optical module, and transmit it to the anterior segment or posterior segment of the eye for imaging.

[0024] By adopting the above scheme, the device can reflect or transmit the light beam and converge the adjusted light beam so that it can enter the corresponding position of the human eye through the objective lens, which facilitates clear imaging.

[0025] In one embodiment of this application, both the optical path adjustment mirror one and the optical path adjustment mirror two are connected to a linear drive assembly for driving the optical path adjustment mirror one and the optical path adjustment mirror two to move, so as to adjust the optical path.

[0026] In one embodiment of this application, the linear drive assembly includes a stepper motor and a transmission component, wherein the drive shaft of the stepper motor is connected to the optical path adjustment mirror one and the optical path adjustment mirror two via the transmission component.

[0027] In one embodiment of this application, the transmission component is a lead screw moving module, the drive shaft of the stepper motor is connected and assembled with the lead screw in the lead screw moving module, and the drive optical path adjustment reflector one and the optical path adjustment reflector two are disposed on the slide table in the lead screw moving module.

[0028] By adopting the above scheme, when it is necessary to move and adjust the optical path adjustment mirror one and the optical path adjustment mirror two, a stepper motor is used to precisely control the rotation of the lead screw, thereby precisely controlling the movement of the slide table, which drives the optical path adjustment mirror one and the optical path adjustment mirror two to reciprocate along the optical path direction, thus improving the imaging accuracy of the device.

[0029] The second objective of this utility model is to provide an eye measurement instrument.

[0030] To achieve the above objectives, the technical solution of this application is as follows:

[0031] An eye measurement instrument, including a biological eye measurement optical path layout.

[0032] By adopting the above technical solution, the optical path setting that allows for easy switching between measurements of the anterior and posterior segments of the eye is incorporated into the eye measurement instrument, making it easier for users to operate and use.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. By employing a motor-driven rotating optical path switching component, and utilizing rotating reflector and transmissive mirror components, the incident light beam can be easily switched between reflection and transmission, thereby improving the ease of switching between the two optical paths and reducing subsequent maintenance costs.

[0035] 2. By setting optical path adjustment mirror one and optical path adjustment mirror two in the first optical module and the second optical module respectively, the optical path of the beam is adjusted by the two to adjust the final imaging position of the beam in the anterior segment or posterior segment of the eye, so that the device can accurately image different positions of the eye.

[0036] 3. By setting a refractive adjustment lens in the first optical module and adjusting its position in the optical path, the focal length of the emitted beam can be changed. This allows for adjustment and compensation based on the different refractive states of the posterior segment of the eye in different individuals, enabling the device to achieve accurate and clear imaging of different posterior segments. Attached Figure Description

[0037] Figure 1 This is a diagram showing the optical path layout of a biological eye measurement optical path provided in the embodiments of this application during emission;

[0038] Figure 2 This is a diagram showing the optical path layout of a biological eye measurement optical path provided in the embodiments of this application when transmission occurs.

[0039] Explanation of reference numerals in the attached drawings: 1. Light source assembly; 10. Light source; 11. First reflector module; 2. Optical path switching assembly; 21. Reflector assembly; 22. Transmission mirror assembly; 23. Drive motor; 3. First optical module; 31. Second reflector module; 32. Optical path adjustment reflector one; 33. Diopter adjustment lens; 4. Second optical module; 41. Lens assembly; 42. Optical path adjustment reflector two; 43. Third reflector module; 5. Receiving module; 51. Fourth reflector module; 52. Objective lens. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1-2 This application provides a more detailed description of a biological eye measurement optical path layout.

[0041] Please see Figure 1-2 The present application provides a biological eye measurement optical path layout, including: a light source component 1, an optical path switching component 2, a first optical module 3, a second optical module 4, and a receiving module 5.

[0042] The light source assembly 1 directs the light beam into the optical path switching assembly 2 at an incident angle of 30°~60°.

[0043] The optical path switching component 2 is disposed on the optical path of the light source component 1. The light source component 1 emits a light beam, which reaches the optical path switching component 2. The light beam is transmitted or reflected at the optical path switching component 2 to switch the direction of the light path.

[0044] The optical path switching component 2 includes a reflector component 21, a transmissive mirror component 22, and a drive motor 23. The reflector component 21 and the transmissive mirror component 22 are both mounted on the drive shaft of the drive motor 23. The drive motor 23 can be a servo motor or a stepper motor, or a speed gearbox can be mounted on its drive shaft. Correspondingly, the reflector component 21 and the transmissive mirror component 22 are mounted on the output shaft of the speed gearbox.

[0045] It also includes a power supply module and a control module that are electrically connected to the drive motor 23. The power supply module is used to provide power to the drive motor 23, and the control module is used to control the speed of the drive motor 23. The specific structure of both and the connection method with the drive motor 23 are existing conventional technologies, so they will not be described in detail here.

[0046] The first optical module 3 is set in the optical path of the light source component 1. When the light beam is reflected, it receives and transmits the light beam, so that the light beam enters the posterior segment of the eye. When the drive motor 23 drives the optical path switching component 2 to rotate until the light beam enters the reflector component 21, the light beam is reflected on the reflector component 21 and enters the first optical module 3. After passing through the first optical film block 3 to guide the beam transmission, adjust the optical path and focus, the light beam is emitted and enters the posterior segment of the eye to measure parameters such as the axial length of the posterior segment of the eye.

[0047] The second optical module 4 is located in the optical path of the light source assembly 1. When the light beam is transmitted, it receives and conducts the light beam, allowing the light beam to enter the anterior segment. When the drive motor 23 drives the optical path switching assembly 2 to rotate until the light beam enters the transmission mirror assembly 22, the light beam is transmitted on the transmission mirror assembly 22 and enters the second optical module 4. After the process of guiding the bundle transmission and adjusting the optical path by the second optical film block 4, the light beam is emitted and enters the anterior segment to measure the parameters of the position of the cornea, anterior chamber and lens in the anterior segment.

[0048] The receiving module 5 is set in the optical path of the light source assembly 1 to receive and transmit the light beam emitted from the first optical module 3 or the second optical module 4. After the light beam passes through the first optical film block 3 or the second optical module 4, the light beam enters the receiving module 5. After further focusing, the light beam is focused into the human eye to achieve the purpose of accurate measurement.

[0049] The light source assembly 1 emits a light beam, which is transmitted or reflected at the optical path switching assembly 2, and then either enters the first optical module 3 or the second optical module 4 and is transmitted out. The receiving module 5 receives the light beam and transmits it out to measure the posterior or anterior segment of the eye.

[0050] The light source assembly 1 includes a light source 10 arranged along the optical path direction. The light source 10 is positioned above the optical path switching assembly 2 and is used to direct the light beam into the optical path switching assembly 2.

[0051] In this embodiment, the light source assembly 1 may further include a first reflector module 11, wherein the first reflector module 11 includes one or more reflectors. Depending on the position of the light source and the angle at which the light beam needs to be incident, one or more reflectors are arranged in the light output direction to change the direction of light beam propagation.

[0052] The reflector assembly 21 includes two reflectors, which are arranged circumferentially along the drive shaft of the drive motor 23 and symmetrically mounted thereon. Two mounting gaps are formed between the two reflectors. The light beam is reflected once at one of the reflectors, transmitted through the first optical module 3, and reflected a second time at the other reflector before entering the receiving module 5.

[0053] The transmissive mirror assembly 22 includes two transmissive mirrors and two reflective mirrors, which are respectively assembled in two assembly gaps and connected and fixed to the drive shaft of the drive motor 23. The light beam undergoes a first transmission at one of the transmissive mirrors, is conducted through the second optical module 4, undergoes a second transmission at the other transmissive mirror, and enters the receiving module 5. The drive motor 23 drives the reflective mirror and the transmissive mirror to rotate, thereby selecting one of them and performing reflection or transmission so that it enters the subsequent first optical module 3 or second optical module 4.

[0054] In this embodiment, the two reflecting mirrors and the two transmitting mirrors can be fan-shaped mirrors of equal area, forming a planar dichroic mirror to reflect or transmit the light beam.

[0055] The first optical module 3 includes a second reflector module 31, an optical path adjustment reflector 32, and a diopter adjustment lens 33, all arranged along the optical path direction. The second reflector module 31, the optical path adjustment reflector 32, and the diopter adjustment lens 33 are all positioned above the optical path switching assembly 2. The diopter adjustment lens 33 can adjust and compensate according to the refractive state of the human eye by reciprocating along the optical path direction. After receiving the light beam, the first optical module 3 first passes through the second reflector module 31, changing its propagation direction. The light beam then passes through one of the reflections of the transmission mirror assembly 22. After being reflected by the mirror, the light beam enters the optical path adjustment mirror 32. The optical path adjustment mirror 32 can adjust the optical path so that the light beam illuminates different positions of the posterior segment of the human eye. The light beam after adjusting the optical path passes through the refractive adjustment lens 33 and can be adjusted and compensated according to the refractive state of different human eyes. Finally, the adjusted light beam is reflected by the second mirror module 31 to another mirror. After reflection, the light beam is finally received by the receiving module 5. The refractive adjustment lens 33 is connected to the drive shaft of the external drive component, which can be an electric actuator assembly or a linear movement module.

[0056] In this embodiment, the second reflector module 31 includes one or more reflectors. According to the actual optical path layout requirements, one or more reflectors are selected and assembled in the optical path direction of the first module 3 so that the beam can change the propagation direction to achieve the required angle of the beam direction.

[0057] The second optical module 4 includes an optical path adjustment mirror 42 and a third mirror module 43 arranged along the optical path direction. The optical path adjustment mirror 42 and the third mirror module 43 are located below the optical path switching component 2. After receiving the light beam, the second optical module 4 first passes through the third mirror module 43 and changes its propagation direction. After passing through one of the transmission mirrors of the transmission mirror component 22, the light beam enters the optical path adjustment mirror 42. The optical path adjustment mirror 42 can also adjust the optical path and make the light beam illuminate different positions of the anterior segment of the eye. The light beam after adjusting the optical path then passes through the third mirror module 43 and reflects the adjusted light beam into another transmission mirror. After transmission, the light beam is finally received by the receiving module 5.

[0058] In this embodiment, the third reflector module 43 includes one or more reflectors. According to the actual optical path layout requirements, one or more reflectors are selected and assembled in the optical path direction of the second module 4 so that the beam can change the propagation direction to achieve the required angle of the beam direction.

[0059] The receiving module 5 includes an objective lens 52 arranged along the optical path direction. The objective lens 52 is positioned above the optical path switching component 2 and can receive and focus the light beam emitted from the first optical module 3 or the second optical module 4, and transmit it to the anterior segment or posterior segment of the eye for imaging.

[0060] In this embodiment, the receiving module 5 may also be provided with a fourth reflector module 51. The fourth reflector module 51 includes one or more fourth reflectors. According to the actual optical path layout requirements, one or more fourth reflectors are selected and assembled in the optical path direction of the receiving module 5 so that the beam can change the propagation direction to achieve the angular requirements of the beam direction.

[0061] Both the optical path adjustment mirror 32 and the optical path adjustment mirror 42 are connected to the linear drive assembly to drive the optical path adjustment mirror 32 and the optical path adjustment mirror 42 to move, so as to adjust the optical path.

[0062] The linear drive assembly includes a stepper motor and a transmission component. The drive shaft of the stepper motor is connected to the optical path adjustment mirror 32 and the optical path adjustment mirror 42 via the transmission component.

[0063] The transmission component is a lead screw moving module. The drive shaft of the stepper motor is connected and assembled with the lead screw in the lead screw moving module. The optical path adjustment mirror 32 and the optical path adjustment mirror 42 are set on the slide table in the lead screw moving module. The rotation angle is precisely controlled by the stepper motor, thereby precisely controlling the angle of the lead screw to achieve the purpose of precisely controlling the moving distance of the optical path adjustment mirror 32 and the optical path adjustment mirror 42, thereby realizing the precise adjustment of the optical path and optical path inside the first optical module 3 and the second optical module 4.

[0064] The second objective of this utility model is to provide an eye measurement instrument.

[0065] To achieve the above objectives, the technical solution of this application is as follows:

[0066] An eye measurement instrument, including a biological eye measurement optical path layout.

[0067] By adopting the above technical solution, the optical path setting that allows for easy switching between measurements of the anterior and posterior segments of the eye is incorporated into the eye measurement instrument, making it easier for users to operate and use.

[0068] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A biological eye measurement optical path layout, characterized in that, include: Light source component (1); An optical path switching component (2) is disposed on the optical path of the light source component (1). The light source component (1) emits a light beam, which reaches the optical path switching component (2). The light beam is transmitted or reflected at the optical path switching component (2) to switch the direction of the optical path. The optical path switching component (2) includes: The mirror assembly (21), the transmission mirror assembly (22), and the drive motor (23) are provided, wherein the mirror assembly (21) and the transmission mirror assembly (22) are both mounted on the drive shaft of the drive motor (23); The first optical module (3) is disposed in the optical path of the light source assembly (1). When the light beam is reflected, it receives and conducts the light beam so that the light beam enters the posterior segment of the eye. The second optical module (4) is disposed in the optical path of the light source assembly (1). When the light beam is transmitted, it receives and conducts the light beam so that the light beam enters the anterior segment of the eye. The receiving module (5) is disposed in the optical path of the light source assembly (1) and is used to receive and transmit the light beam emitted from the first optical module (3) or the second optical module (4); The light source component (1) emits a light beam, which is transmitted or reflected at the optical path switching component (2) and enters either the first optical module (3) or the second optical module (4) and is transmitted out. The receiving module (5) receives the light beam and transmits it out to measure the posterior segment or anterior segment of the eye.

2. The optical path layout for biological eye measurement according to claim 1, characterized in that: The light source assembly (1) includes a light source (10) arranged along the optical path direction. The light source (10) is arranged above the optical path switching assembly (2) and is used to direct the light beam into the optical path switching assembly (2).

3. The optical path layout for biological eye measurement according to claim 1, characterized in that, The reflector assembly (21) includes two reflectors. The two reflectors are arranged circumferentially along the drive shaft of the drive motor (23) and symmetrically mounted thereon. Two mounting gaps are formed between the two reflectors. The light beam is reflected once at one of the reflectors, and after being transmitted through the first optical module (3), it is reflected twice at the other reflector and enters the receiving module (5). The transmission mirror assembly (22) includes two transmission mirrors. The two reflection mirrors are respectively assembled in the two assembly gaps and are connected and fixed to the drive shaft of the drive motor (23). The light beam is transmitted once at one of the transmission mirrors, and after being conducted by the second optical module (4), it is transmitted twice at the other transmission mirror and enters the receiving module (5).

4. The optical path layout for biological eye measurement according to claim 3, characterized in that: The first optical module (3) includes a second reflector module (31), an optical path adjustment reflector (32), and a diopter adjustment lens (33) arranged along the optical path direction. The second reflector module (31), the optical path adjustment reflector (32), and the diopter adjustment lens (33) are all arranged above the optical path switching component (2). The diopter adjustment lens (33) can adjust and compensate according to the refractive state of the human eye by moving back and forth along the optical path direction.

5. The optical path layout for biological eye measurement according to claim 4, characterized in that: The second optical module (4) includes an optical path adjustment mirror two (42) and a third mirror module (43) arranged along the optical path direction. The optical path adjustment mirror two (42) and the third mirror module (43) are arranged below the optical path switching component (2).

6. A biological eye measurement optical path layout according to claim 4 or 5, characterized in that: The receiving module (5) includes an objective lens (52) arranged along the optical path direction. The objective lens (52) is arranged above the optical path switching component (2) and can receive and focus the light beam emitted from the first optical module (3) or the second optical module (4) and transmit it to the anterior segment or posterior segment of the eye for imaging.

7. A biological eye measurement optical path layout according to claim 4 or 5, characterized in that: It also includes a linear drive assembly, wherein the optical path adjustment mirror one (32) and the optical path adjustment mirror two (42) are both connected to the linear drive assembly and are used to drive the optical path adjustment mirror one (32) and the optical path adjustment mirror two (42) to move in order to adjust the optical path.

8. The optical path layout for biological eye measurement according to claim 7, characterized in that: The linear drive assembly includes a stepper motor and a transmission component. The drive shaft of the stepper motor is connected to the optical path adjustment mirror one (32) and the optical path adjustment mirror two (42) through the transmission component.

9. The optical path layout for biological eye measurement according to claim 8, characterized in that: The transmission component is a lead screw moving module. The drive shaft of the stepper motor is connected and assembled with the lead screw in the lead screw moving module. The drive optical path adjustment reflector one (32) and the optical path adjustment reflector two (42) are set on the slide table in the lead screw moving module.

10. An eye measurement instrument, characterized in that: Including a biological eye measurement optical path layout as described in any one of claims 1-9.

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