Simulated eye device and biometer

Abstract

The simulated eye device provided in the present application includes: an eye cover, a glass column and a simulated eye bracket, wherein the eye cover is provided with a light-transmitting hole, the eye cover is connected to the simulated eye bracket, a glass column mounting hole is provided in the simulated eye bracket, the glass column is mounted in the glass column mounting hole, and a reflective inclined surface is provided on the end of the glass column mounting hole away from the eye cover. After the light beam enters through the light-transmitting hole and passes through the glass column and illuminates the reflective inclined surface, under the action of the reflective inclined surface, the light beam will form light reflection in the glass column and will not return along the original path, and will not generate unnecessary interference peaks. At the same time, it will not change the reflective characteristics of the bottom surface of the glass column, which can improve the measurement accuracy of the simulated eye device.

Description

Technical Field

[0001] The present application relates to the technical fields of mechanical manufacturing and biometric detection equipment, and in particular to a simulated eye device and a biometric instrument. Background Art

[0002] The biometer is a device that measures parameters such as the corneal curvature and axial length of the eye. The simulated eye is a measuring instrument for calibrating the biometer. During calibration, the biometer is used to measure the corneal curvature and axial length of the standard simulated eye. The measured values ​​of the biometer are compared with the standard values ​​of the simulated eye to determine the accuracy of the biometer.

[0003] During calibration, the light beam is projected onto the simulated eye before measurement. However, after the light beam enters the glass column in the simulated eye, it is easy to return along the original path, affecting the measurement results. To avoid such results, the simulated eyes on the market are generally processed as follows: 1. Paint the bottom of the glass column. This solution is more likely to change the reflective properties of the bottom of the glass column, resulting in inaccurate measurement results; 2. Spray light-absorbing paint on the surface of the bracket at the bottom of the glass column. This solution has poor reliability and is prone to produce unnecessary interference peaks, affecting measurement accuracy. Summary of the Invention

[0004] The present application provides a simulated eye device and a biometer, which are intended to solve the problem in the prior art that painting the bottom surface of a glass column easily changes the reflective properties of the bottom surface of the glass column, or spraying light-absorbing paint on the surface of the bracket at the bottom of the glass column easily generates unnecessary interference peaks and affects the measurement accuracy.

[0005] In order to solve the above problems, in the first aspect, the present application provides a simulated eye device, including: an eye cover, a glass column and a simulated eye bracket, the eye cover is provided with a light-transmitting hole, the eye cover is connected to the simulated eye bracket, a glass column mounting hole is provided in the simulated eye bracket, the glass column is installed in the glass column mounting hole, and a reflective inclined surface is provided on the end of the glass column mounting hole away from the eye cover, and a light beam is emitted through the light-transmitting hole and passes through the glass column and then illuminates the reflective inclined surface to form light reflection without returning along the original path.

[0006] Preferably, the hole wall of the glass column mounting hole is evenly provided with first tightening ribs protruding toward the axial direction of the glass column mounting hole, and the first tightening ribs are used to clamp and fix the glass column.

[0007] Preferably, the length of the glass column mounting hole is smaller than the length of the glass column.

[0008] Preferably, the glass column is cylindrical, and both ends of the glass column are configured to be spherical surfaces.

[0009] Preferably, the eye cover includes a cover plate and a fastening part, the cover plate is connected to the fastening part, and an assembly hole matching the fastening part is provided in the simulated eye bracket, and the fastening part and the assembly hole cooperate with each other to fix the eye cover on the simulated eye bracket.

[0010] Preferably, second tightening ribs are evenly arranged on the surface of the fastening portion or the hole wall of the assembly hole, and the fastening portion is tightly connected to the assembly hole through the second tightening ribs.

[0011] Preferably, the simulated eye further comprises a support rod and a base, wherein the first end of the support rod is connected to the simulated eye bracket, and the second end of the support rod is connected to the base.

[0012] Preferably, a mounting slot is provided on the base, and the simulated eye is mounted on the biometric instrument through the mounting slot.

[0013] Preferably, the support rod is a curved structure, and the middle portion of the support rod extends toward the direction in which the light beam enters the glass column to form the curved structure.

[0014] In a second aspect, the present application further provides a biometric instrument, which is equipped with a simulated eye device as described in any one of the above items.

[0015] The simulated eye device provided in the present application includes: an eye cover, a glass column and a simulated eye bracket, wherein the eye cover is provided with a light-transmitting hole, the eye cover is connected to the simulated eye bracket, a glass column mounting hole is provided in the simulated eye bracket, the glass column is mounted in the glass column mounting hole, and a reflective inclined surface is provided on the end of the glass column mounting hole away from the eye cover. After the light beam enters through the light-transmitting hole and passes through the glass column and illuminates the reflective inclined surface, under the action of the reflective inclined surface, the light beam will form light reflection in the glass column and will not return along the original path, and will not generate unnecessary interference peaks. At the same time, it will not change the reflective characteristics of the bottom surface of the glass column, which can improve the measurement accuracy of the simulated eye device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 An exploded view of a simulated eye device according to an embodiment;

[0017] Figure 2 is a cross-sectional view of a simulated eye device according to one embodiment;

[0018] Figure 3 is a top view of a simulated eye device according to an embodiment;

[0019] Figure 4 A front view of a simulated eye device according to an embodiment;

[0020] Among them, 1. Eye cover; 11. Light-transmitting hole; 12. Cover plate; 13. Fastening part; 14. Second tight-fitting rib; 2. Glass column; 3. Simulated eye bracket; 31. Glass column mounting hole; 32. Reflective slope; 33. First tight-fitting rib; 34. Assembly hole; 4. Support rod; 5. Base; 51. Mounting slot.

[0021] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0022] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0024] Reference Figure 1 - Figure 4 , is a simulated eye device provided by the present application, comprising: an eye cover 1, a glass column 2 and a simulated eye bracket 3, wherein the eye cover 1 is provided with a light-transmitting hole 11, the eye cover 1 is connected to the simulated eye bracket 3, a glass column mounting hole 31 is provided in the simulated eye bracket 3, the glass column 2 is mounted in the glass column mounting hole 31, and a reflective inclined surface 32 is provided on the end of the glass column mounting hole 31 away from the eye cover 1. After the light beam enters through the light-transmitting hole 11 and passes through the glass column 2, it is irradiated on the reflective inclined surface 32 to form light reflection and will not return along the original path.

[0025] As described above, the simulated eye device provided by the present invention comprises: an eye cover 1, a glass column 2 and a simulated eye bracket 3, wherein the eye cover 1 and the simulated eye bracket 3 are detachably connected, and the eye cover 1 and the simulated eye bracket 3 work together to fix the glass column 2 in the simulated eye bracket 3. Furthermore, the eye cover 1 and the simulated eye bracket 3 can also be integrally thermoplastic-molded as a whole, and the outer contours of the simulated eye bracket 3 and the eye cover 1 can be cylindrical, square or other shapes, which are not specifically limited here; as a preferred embodiment In the embodiment, the outer contours of the simulated eye bracket 3 and the eye cover 1 are cylindrical, and a glass column mounting hole 31 is provided in the simulated eye bracket 3, wherein the axis of the glass column mounting hole 31 coincides with the axis of the simulated eye bracket 3, that is, the glass column mounting hole 31 is provided at the axis of the glass column mounting hole 31, and the glass column 2 is fixedly installed in the glass column mounting hole 31. A light-transmitting hole 11 that runs through the entire eye cover 1 is also provided at the axis of the eye cover 1, and an external light beam can be irradiated into the glass column 2 from the light-transmitting hole 11. The glass column 2 is a kind of glass column that can be The optical device is made of a light-transmitting optical material (such as quartz, borax, boric acid, barite, barium carbonate, etc.), which is cylindrical in shape, and both ends of the glass column 2 are set to be curved surfaces, similar to the lens in the animal eye, which is a bidirectional convex spherical curved surface structure. The spherical curved surface is conducive to converging light beams from different directions. When the external light beam enters the glass column 2 from the first end through the light-transmitting hole 11, the light beam propagates along the glass column 2 and is emitted from the second end of the glass column 2, and then irradiates the reflecting inclined surface 32, and the reflection The reflecting bevel 32 forms a certain angle with the axis of the glass column 2 (not 90 degrees, preferably in the range of 30 degrees to 60 degrees). The reflecting bevel 32 is a smooth plane mirror. When the light beam exits the glass column 2 and hits the reflecting bevel 32, light reflection occurs. The light beam does not return along the original path. Therefore, it does not overlap with the light beam incident on the glass column 2 and produce unnecessary interference peaks. At the same time, unlike painting the bottom surface of the glass column 2, it does not change the reflective properties of the bottom surface of the glass column 2, thereby ensuring that the measurement accuracy is not affected.

[0026] In one embodiment, the hole wall of the glass column mounting hole 31 is evenly provided with first tightening ribs 33 protruding toward the axial direction of the glass column mounting hole 31 , and the first tightening ribs 33 are used to clamp and fix the glass column 2 .

[0027] As described above, the installation method of the glass column 2 to the glass column mounting hole 31 can be: the diameter of the glass column 2 is set to be consistent with the diameter of the glass column mounting hole 31, so that the glass column 2 can be directly embedded in the glass column mounting hole 31 to fix the glass column 2. As a preferred method, a first tightening rib 33 protruding toward the axial direction of the glass column mounting hole 31 can be evenly provided on the hole wall of the glass column mounting hole 31. Preferably, three first tightening ribs 33 are provided. When the glass column 2 is embedded in the glass column mounting hole 31, the outer surface of the glass column 2 will contact the first tightening rib 33 to fix the glass column 2. At the same time, the raised first tightening rib 33 can prevent the glass column 2 from directly fitting with the glass column mounting hole 31, but will make a gap between the glass column 2 and the hole wall of the glass column mounting hole 31 that is consistent with the protrusion height of the first tightening rib 33, so that when the glass column 2 is disassembled, it is easy to grab the glass column 2 for easy disassembly.

[0028] In one embodiment, the length of the glass column mounting hole 31 is smaller than the length of the glass column 2 .

[0029] As mentioned above, the length of the glass column mounting hole 31 is smaller than the length of the glass column 2, that is, most of the glass column 2 is embedded in the glass column mounting hole 31, while a part of it is exposed outside the glass column mounting hole 31. Therefore, when disassembling, the operator can hold the part that is exposed outside the glass column mounting hole 31, so as to easily pull the glass column 2 out of the glass column mounting hole 31.

[0030] In one embodiment, the glass column 2 is cylindrical, and both ends of the glass column 2 are configured to be spherical surfaces.

[0031] As mentioned above, both ends of the glass column 2 are configured as curved surfaces, similar to the lens in an animal's eye, which is a bidirectional convex spherical curved surface structure. The spherical curved surface is conducive to converging light beams irradiated from different directions.

[0032] Reference Figure 2 In one embodiment, the eye cover 1 includes a cover plate 12 and a fastening portion 13, the cover plate 12 is connected to the fastening portion 13, and the simulated eye bracket 3 is provided with an assembly hole 34 matching the fastening portion 13, and the fastening portion 13 and the assembly hole 34 cooperate with each other to fix the eye cover 1 on the simulated eye bracket 3.

[0033] As described above, the eye cover 1 includes a cover plate 12 and a fastening portion 13, wherein, in order to facilitate the external light beam to enter the glass column 2 from the light-transmitting hole 11 and to match the spherical surface at the end of the glass column 2, the cover plate 12 is configured as a bidirectionally recessed spherical surface structure, wherein a receiving hole for accommodating the glass column 2 is also provided at the center of the fastening portion 13, and the receiving hole may or may not be provided with the first tight-fitting rib 33 for stabilizing the glass column 2 as mentioned in the above embodiment, and an assembly hole 34 matching the fastening portion 13 is provided at the end of the simulated eye bracket 3 in contact with the cover plate 12, wherein the diameter of the assembly hole 34 is the same as the outer diameter of the fastening portion 13, and the diameter of the assembly hole 34 is larger than the diameter of the glass column mounting hole 31. If the glass The length of the glass column mounting hole 31 is smaller than the length of the glass column 2, so most of the glass column 2 is embedded in the glass column mounting hole 31, and a part of it leaks out of the assembly hole 34. When the eye cover 1 is assembled to the simulated eye bracket 3, the fastening part 13 is embedded in the assembly hole 34, and the fastening part 13 is tightly matched with the assembly hole 34, and the cover plate 12 is fitted with the end of the simulated eye bracket 3. Furthermore, a pry hole (not shown) can be provided at the end of the cover plate 12 close to the simulated eye bracket 3 or at the end of the simulated eye bracket 3 close to the cover plate 12 (that is, the assembly surface when the two are assembled). When disassembly is required, a thin flat-blade screwdriver can be used to slowly pry the pry hole provided on their assembly surfaces to separate the eye cover 1 and the simulated eye bracket 3.

[0034] In one embodiment, second tightening ribs 14 are evenly provided on the surface of the fastening portion 13 or the wall of the assembly hole 34 , and the fastening portion 13 is tightly connected to the assembly hole 34 through the second tightening ribs 14 .

[0035] As described above, the second tightening ribs 14 are evenly arranged on the surface of the fastening portion 13 or the wall of the assembly hole 34. When the eye cover 1 and the simulated eye bracket 3 are assembled, the fastening portion 13 and the assembly hole 34 are kept in close contact through the second tightening ribs 14, thereby ensuring the firmness of the installation of the eye cover 1 and the simulated eye bracket 3.

[0036] Reference Figure 3 and Figure 4 In one embodiment, the simulated eye further includes a support rod 4 and a base 5 , wherein a first end of the support rod 4 is connected to the simulated eye bracket 3 , and a second end of the support rod 4 is connected to the base 5 .

[0037] As described above, the simulated eye further includes a support rod 4 and a base 5. The two ends of the support rod 4 are connected to the simulated eye bracket 3 and the base 5 respectively. The base 5 can be fixed to the biometer. The support rod 4 is used to support the simulated eye bracket 3. Furthermore, the support rod 4 is a retractable rod, that is, the user can adjust the length of the support rod 4 to adapt to different scene requirements;

[0038] Furthermore, a rotating assembly (not shown) can be set between the support rod 4 and the simulated eye bracket 3, and the first end of the rotating assembly is connected to the simulated eye bracket 3, and the second end of the rotating assembly is connected to the support rod 4, so that the simulated eye and the support rod 4 can achieve relative rotation between the two through the rotating assembly, which is convenient for adjusting the upper and lower angles of the simulated eye bracket 3.

[0039] In one embodiment, a mounting slot 51 is provided on the base 5 , and the simulated eye is mounted on the biometric instrument through the mounting slot 51 .

[0040] As described above, the base 5 can be configured to have an arched structure adapted to the biometer. The support rod 4 is connected to the middle arch of the base 5. A mounting groove 51 is provided at each end of the base 5. Furthermore, the mounting groove 51 has a U-shaped structure when viewed from above, and a concave structure when viewed from the front. The simulated eye can be fixed to a limiting structure (T-shaped limiting column, not shown) provided on the surface of the biometer through the mounting groove 51.

[0041] In one embodiment, the support rod 4 is a curved structure, and the middle portion of the support rod 4 extends toward the direction in which the light beam enters the glass column 2 to form the curved structure.

[0042] As described above, the support rod 4 is a curved structure, and the middle portion of the support rod 4 extends toward the direction in which the light beam enters the glass column 2 to form the curved structure, so that a certain space is left in the middle portion of the support rod 4 for easy use.

[0043] In a second aspect, the present application further provides a biometric instrument, which is equipped with a simulated eye device as described in any one of the above items.

[0044] In summary, the simulated eye device provided in the embodiment of the present application includes: an eye cover 1, a glass column 2 and a simulated eye bracket 3, the eye cover 1 is provided with a light-transmitting hole 11, the eye cover 1 is connected to the simulated eye bracket 3, a glass column mounting hole 31 is provided in the simulated eye bracket 3, the glass column 2 is mounted in the glass column mounting hole 31, and a reflective slope 32 is provided on the end of the glass column mounting hole 31 away from the eye cover 1. After the light beam is injected into and passes through the glass column 2 and irradiates the reflective slope 32, under the action of the reflective slope 32, the light beam will form a light reflection in the glass column 2 and will not return along the original path, and no unnecessary interference peaks will be generated. The reflective properties of the bottom surface of the glass column 2 will not be changed, and the measurement accuracy of the simulated eye device can be improved. In addition, a first tight-fitting rib 33 is evenly arranged in the glass column mounting hole 31, so that there is a gap between the glass column 2 and the glass column mounting hole 31, which is convenient for the disassembly of the glass column 2. A second tight-fitting rib 14 is evenly arranged on the surface of the fastening portion 13 or the hole wall of the assembly hole 34. The fastening portion 13 and the assembly hole 34 are kept in close contact through the second tight-fitting rib 14, which ensures the firmness of the installation of the eye cover 1 and the simulated eye bracket 3. At the same time, the design of the simulated eye bracket 3 not completely surrounding the simulated eye glass column 2 is adopted, so that there is a force point when disassembling the simulated eye glass column 2, which is convenient for disassembly.

[0045] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, and back) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0046] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A simulated eye device, characterized in that: include: An eye cover, a glass column, and a simulated eye bracket. The eye cover is provided with a light-transmitting hole, the eye cover is connected to the simulated eye bracket, a glass column mounting hole is provided in the simulated eye bracket, the glass column is mounted in the glass column mounting hole, and a reflective slope is provided on the end of the glass column mounting hole away from the eye cover. The reflective slope is arranged at an angle to the axis of the glass column. A light beam enters through the light-transmitting hole, passes through the glass column, and then strikes the reflective slope, causing light to be reflected from the reflective slope and not return along the original path. Among them, the hole wall of the glass column mounting hole is evenly provided with a first tightening rib protruding toward the axial direction of the glass column mounting hole, and the first tightening rib is used to clamp and fix the glass column; the glass column is cylindrical, and both ends of the glass column are set to spherical surfaces.

2. The simulated eye device according to claim 1, wherein The length of the glass column mounting hole is smaller than the length of the glass column.

3. The simulated eye device according to claim 1, wherein The eye cover includes a cover plate and a fastening part, the cover plate is connected to the fastening part, and an assembly hole matching the fastening part is provided in the simulated eye bracket. The fastening part and the assembly hole cooperate with each other to fix the eye cover on the simulated eye bracket.

4. The simulated eye device according to claim 3, wherein: Second tight-fitting ribs are evenly arranged on the surface of the fastening portion or the hole wall of the assembly hole, and the fastening portion is tightly connected to the assembly hole through the second tight-fitting ribs.

5. The simulated eye device according to claim 1, wherein: The simulated eye further comprises a support rod and a base, wherein a first end of the support rod is connected to the simulated eye bracket, and a second end of the support rod is connected to the base.

6. The simulated eye device according to claim 5, wherein: The base is provided with a mounting groove, and the simulated eye is mounted on the biometric instrument through the mounting groove.

7. The simulated eye device according to claim 6, wherein: The support rod is a curved structure, and the middle portion of the support rod extends toward the direction in which the light beam enters the glass column to form the curved structure.

8. A biometric measuring instrument, characterized in that: The biometric instrument is equipped with the simulated eye device according to any one of claims 1 to 7.

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