Optical coherence system and biological measuring instrument

Abstract

The utility model discloses an optical coherent system and a biological measuring instrument. The optical coherent system comprises a base, an optical fiber coupling module, an optical fiber collimation module, a light guide assembly, a lens assembly and a light splitting assembly. The optical fiber coupling module is arranged on the base; the optical fiber collimation module is arranged on the base and is connected with the optical fiber coupling module; the light guide assembly is arranged on the light emitting side of the optical fiber collimation module; the lens assembly is arranged on the front side of the base; the light splitting assembly is arranged on the base and located between the light guide assembly and the lens assembly; light emitted from the optical fiber coupling module can be collimated by the optical fiber collimation module, then irradiates the light guide assembly, is transmitted to the light splitting assembly after being conducted by the light guide assembly, and is transmitted to the lens assembly through the light splitting assembly to be emitted. According to the technical scheme provided by the utility model, the occupied space of the optical coherent system is smaller, and the overall size of the biological measuring instrument can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of eye detection equipment, in particular to an optical coherence system and a biometric meter. Background Art

[0002] Scope of application of ophthalmic optical biometer This product is used by hospital ophthalmology departments to measure the axial length, corneal curvature and anterior chamber depth of patients' eyes, as well as the corneal diameter (white to white, WTW) of human eyes and the degree calculation of the required intraocular lens to be implanted in the eye. In the traditional optical coherent system, the coherent light output by the coherent light source is output to the fiber coupler by optical fiber, and its output end is connected to the fiber collimator to make the output light parallel light. The light output by the fiber collimator is the detection light. In the traditional optical coherent system, the light output by the fiber collimator will be transmitted to the human eye after being transmitted through multiple lenses. The lenses occupy a large space and are complicated to install, making the overall volume of the biometer large. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is that the light output by the fiber collimator in the traditional optical coherence system is transmitted to the human eye after being conducted through multiple lenses. The lenses occupy a large space and are complicated to install, making the overall volume of the biometer large.

[0004] In order to solve the above technical problems, the utility model provides an optical coherence system, comprising:

[0005] Pedestal;

[0006] An optical fiber coupling module is arranged on the base;

[0007] An optical fiber alignment module, disposed on the base and connected to the optical fiber coupling module;

[0008] A light guide assembly, arranged on the light output side of the optical fiber collimation module;

[0009] A lens assembly is arranged on the front side of the base;

[0010] A light splitting component, disposed on the base and located between the light guide component and the lens component;

[0011] The light emitted from the fiber coupling module can be collimated by the fiber collimating module and then irradiated onto the light guide component, and then transmitted to the light splitting component after being conducted by the light guide component, and then transmitted to the lens component through the light splitting component for emission.

[0012] Optionally, the fiber optic collimation module is arranged on the rear side of the base, the light guide component is located in front of the fiber optic collimation module, and the light guide component includes a light guide column, which extends along the front and rear directions of the base, and the front end of the light guide column is arranged close to the splitter component.

[0013] Optionally, the light guide assembly further includes a light guide pressure plate, and a rubber member located between the light guide pressure plate and the light guide column, the light guide pressure plate is connected to the base, and the light guide pressure plate and the base are clamped together on the peripheral side of the light guide column.

[0014] Optionally, a boss is protruding from the bottom of the base, and a mounting groove is formed on the boss. The light guide column is arranged in the mounting groove and fits with a side wall of the mounting groove. The light guide pressure plate is arranged in the mounting groove and has a first crimping wall and a second crimping wall connected to each other. The first crimping wall is clamped on the other side of the light guide column and connected to the boss, and the second crimping wall is crimped on the top of the light guide column.

[0015] Optionally, the light splitting component includes:

[0016] A first lens, which is opposite to the front end of the light guide column, and a reflective surface of the first lens is arranged obliquely to the light guide column;

[0017] A second lens is arranged parallel to and spaced from the first lens, and a reflective surface of the second lens is arranged obliquely to the lens assembly;

[0018] Wherein, the reflective surface of the first lens and the reflective surface of the second lens are arranged opposite to each other.

[0019] Optionally, the fiber coupling module includes a light source module and a fiber coupler corresponding to the light source module, the light source module is extended along the front-to-back direction of the base, and the fiber coupler is connected to the fiber collimation module via a fiber guide wire.

[0020] Optionally, the light source module is arranged in parallel with the light guide column, and the optical fiber collimation module is arranged at a relative interval to the rear end of the light guide column.

[0021] Optionally, the optical fiber collimation module includes a support seat and a collimator disposed on the support seat, and the support seat is movably disposed on the base and has a movable stroke approaching and moving away from the light guide component.

[0022] Optionally, one of the support seat and the base is provided with a long hole, and the other is provided with a matching hole matching the long hole; the optical coherence system also includes a connecting member, which is passed through the long hole and the matching hole to fix the support seat at different positions of the base.

[0023] The utility model also provides a biometric measuring instrument, comprising the above optical coherence system.

[0024] The technical solution provided by the utility model has the following advantages:

[0025] The optical coherence system provided by the utility model comprises a base, an optical fiber coupling module, an optical fiber collimation module, a lens assembly and a light splitting assembly. The optical fiber coupling module can emit coherent light to transmit to the optical fiber collimation module. After the light is collimated by the optical fiber collimation module, it is emitted to the light guide assembly. The light path is increased by the light guide assembly, so that the distance between the optical fiber coupling module and the lens assembly can be shortened, so that the space occupied by the optical coherence system is smaller, and the overall volume of the biometer can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 A schematic structural diagram of an embodiment of an optical coherence system provided by the utility model;

[0028] Figure 2 for Figure 1 A schematic structural diagram of the optical coherence system from another perspective;

[0029] Figure 3 for Figure 1 A structural schematic diagram of the optical coherence system from another perspective;

[0030] Figure 4 for Figure 1 A schematic diagram of the decomposed structure of the optical coherence system described in .

[0031] Description of Figure Numbers:

[0032] 100-optical coherence system; 1-base; 11-boss; 12-mounting groove; 13-matching hole; 2-fiber coupling module; 21-light source module; 22-fiber coupler; 3-fiber collimation module; 31-support seat; 311-long hole; 32-collimator; 4-light guide assembly; 41-light guide column; 42-light guide pressure plate; 421-first crimping wall; 422-second crimping wall; 43-rubber part; 5-lens assembly; 6-spectrometer assembly; 61-first lens; 62-second lens.

[0033] The realization of the purpose, functional characteristics and excellent effects of the utility model will be further explained below in conjunction with specific embodiments and drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] It should be noted that if a directional indication is involved in the embodiments of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0037] The utility model provides an optical coherence system 100, which can form a detection light, which is reflected back after passing through the human eye, and the reference light reflected back by the reference light of the optical coherence system of the biometer, and its differential output signal is I=2cos(φ), where φ is the phase difference between the reference light and the detection light. When the reference light and the detection light are equal in optical path, the signal has a maximum value, so according to the position of the signal maximum value and the optical path value of the variable optical path system, the depth position of the eye reflection surface can be known. The detection light can be focused on the retina, lens and cornea of ​​the eye respectively, so that the thickness of the retina, lens and cornea can be detected.

[0038] Specifically, combined Figures 1 to 3As shown, the optical coherence system 100 includes a base 1, a fiber coupling module 2, a fiber collimation module 3, a light guide component 4, a lens component 5 and a light splitting component 6; the fiber coupling module 2 is arranged on the base 1, and can be used to emit coherent light; the fiber collimation module 3 is arranged on the base 1 and connected to the fiber coupling module 2, and the coherent light emitted by the fiber coupling module 2 can be transmitted to the fiber collimation module 3, and is aligned by the fiber collimation module 3 to form parallel light; the light guide component 4 is arranged on the light output side of the fiber collimation module 3, and the parallel light emitted by the fiber collimation module 3 is transmitted by the light guide component 4 to be transmitted toward the direction of the lens component 5; The lens assembly 5 is arranged on the front side of the base 1, and the human eye is placed on the front side of the lens assembly 5 during detection to be opposite to the front end of the lens assembly 5; the spectroscopic assembly 6 is arranged on the base 1 and is located between the light guide assembly 4 and the lens assembly 5, and the light transmitted by the light guide assembly 4 can be redirected by the spectroscopic assembly 6; the light emitted from the optical fiber coupling module 2 can be collimated by the optical fiber collimation module 3 and irradiated onto the light guide assembly 4, and transmitted by the light guide assembly 4 to the spectroscopic assembly 6, and then transmitted to the lens assembly 5 through the spectroscopic assembly 6 to be emitted to irradiate the human eye, and the light reflected by the human eye can return to the optical fiber collimation module 3 again.

[0039] In the present invention, the optical fiber coupling module 2 can emit coherent light to be transmitted to the optical fiber collimation module 3. After the light is collimated by the optical fiber collimation module 3, it is emitted to the light guide component 4. The light path is increased by the light guide component 4, so that the distance between the optical fiber coupling module 2 and the lens component 5 can be shortened, so that the volume of the optical coherence system 100 can be reduced, thereby reducing the overall volume of the biometer.

[0040] It should be noted that when the optical coherence system 100 is working normally, the side of the lens assembly 5 facing the subject is the front side. Accordingly, the lens assembly 5 is located at the frontmost side of the base 1 to face the eyes of the subject. The description of the orientation in the present utility model is based on this unless otherwise specified.

[0041] Among them, combined Figure 1 and Figure 2As shown, the fiber optic collimation module 3 is arranged on the rear side of the base 1, and the light guide component 4 is located in front of the fiber optic collimation module 3. The light guide component 4 includes a light guide column 41, and the light guide column 41 is extended along the front and rear directions of the base 1. The front end of the light guide column 41 is arranged close to the light splitting component 6. The light is more focused through the light guide column 41 and the optical path can be increased. Compared with the traditional optical coherence system 100, there is no need to set too many lenses, which makes installation more convenient and smaller in size.

[0042] Furthermore, combined with Figure 3 and Figure 4 As shown, the light guide assembly 4 also includes a light guide pressure plate 42, and a rubber member 43 located between the light guide pressure plate 42 and the light guide column 41, the light guide pressure plate 42 is connected to the base 1, and the light guide pressure plate 42 and the base 1 are clamped together on the circumference of the light guide column 41, thereby fixing the light guide column 41 on the base 1 for easy installation.

[0043] Furthermore, a boss 11 is protruding from the bottom of the base 1, and the boss 11 is used to fix the light guide column 41 at a certain height, so that the light guide column 41 can be better aligned with the light outlet hole of the optical fiber collimation module 3, so that light can be better transmitted into the light guide column 41. Among them, a mounting groove 12 is formed on the boss 11, the light guide column 41 is arranged in the mounting groove 12 and fits with a side wall of the mounting groove 12, the light guide pressure plate 42 is arranged in the mounting groove 12, and has a first crimping wall 421 and a second crimping wall 422 connected to each other, the first crimping wall 421 is clamped on the other side of the light guide column 41 and is connected to the boss 11, the second crimping wall 422 is crimped on the top of the light guide column 41, the light guide column 41 is fixed by the mounting groove 12 and the light guide pressure plate 42, and the light of the light guide column 41 can be sealed by the mounting groove 12 to avoid light leakage and affect other optical modules.

[0044] Specifically, the light guide column 41 is roughly in the shape of a rectangular parallelepiped, and the length direction of the light guide column 41 extends along the front-to-back direction of the base 1 to better guide the light to the light splitting component 6 and then to the human eye.

[0045] The light splitting component 6 is used to change the transmission direction of the light so that the light can be better transmitted to the eyes of the person being tested. Figure 2 and Figure 3As shown, the light splitting component 6 includes a first lens 61 and a second lens 62, wherein the first lens 61 is opposite to the front end of the light guide column 41, and the reflective surface of the first lens 61 is inclined to the light guide column 41. Preferably, the angle between the first lens 61 and the center line of the light guide column 41 is 45°, so that the light transmitted in the direction from back to front is reflected by the first lens 61 to form a light transmitted in the direction from right to left, thereby irradiating the second lens 62 located on the left side of the first lens 61. The second lens 62 is arranged parallel to the first lens 61 and the reflective surface of the second lens 62 is inclined to the lens assembly 5; wherein the reflective surface of the first lens 61 and the reflective surface of the second lens 62 are arranged opposite to each other. Preferably, the angle between the second lens 62 and the central axis of the lens assembly 5 is 45°, and the light reflected from the first lens 61 is converted into light transmitted in the direction from back to front after being reflected by the second lens 62, thereby transmitting into the lens assembly 5 to irradiate the eyes of the person being tested. The light can reach the eyes of the person being tested after being reflected twice, the structure is simple, and the light guide column 41, the first lens 61 and the second lens 62 can be arranged more compactly, so that less space is occupied.

[0046] In this embodiment, combined with Figures 1 to 3 As shown, the optical fiber coupling module 2 includes a light source module 21 and an optical fiber coupler 22 corresponding to the light source module 21. The light source module 21 is extended along the front-to-back direction of the base 1. The optical fiber coupler 22 is connected to the optical fiber collimation module 3 through an optical fiber guide wire. A coherent light source can be formed through the light source module 21 and can be transmitted to the optical fiber collimation module 3 through the optical fiber coupler 22.

[0047] The light source module 21 is arranged in parallel with the light guide column 41, and the optical fiber collimation module 3 is arranged at a relative interval with the rear end of the light guide column 41. A support platform is also arranged on the right side of the mounting groove 12, and the support platform is protruding from the bottom of the base 1. The mounting module is installed on the support platform and is arranged in parallel with the light guide column 41. The mounting module and the light guide column 41 are isolated by the side wall of the mounting groove 12, so that there will be no crosstalk. The optical fiber collimation module 3 is arranged close to the rear end of the light source module 21 and opposite to the light guide column 41, so that the optical fiber collimation module 3 can be more conveniently connected to the optical fiber coupler 22, and is closer to the light guide column 41, so that the layout of the optical fiber coupling module 2, the light guide module and the optical fiber collimation module 3 is more compact, thereby occupying less space.

[0048] For the optical fiber collimation module 3, the optical fiber collimation module 3 includes a support seat 31 and a collimator 32 arranged on the support seat 31. The support seat 31 is movably arranged on the base 1 and has a movable stroke approaching and moving away from the light guide component 4. The movement of the support seat 31 can drive the collimator 32 to move together, so that the distance between the optical fiber collimation module 3 and the light guide column 41 can be adjusted, so that the light can better enter different types of light guide columns 41, thereby ensuring better light conductivity.

[0049] Preferably, combined Figure 2 and Figure 4 As shown, one of the support seat 31 and the base 1 is provided with a long hole 311, and the other is provided with a matching hole 13 matching with the long hole 311; the optical coherence system 100 also includes a connecting member, which is inserted into the long hole 311 and the matching hole 13 to fix the support seat 31 at different positions of the base 1. The connecting member can be set as a screw or a bolt, etc., which is inserted into the long hole 311 and the matching hole 13 to fix the support seat 31 on the base 1. When the support seat 31 is moved so that the screw is inserted into different positions of the long hole 311, the support seat 31 can be fixed at different positions of the base 1, so that the distance between the collimator 32 and the light guide column 41 can be adjusted, with a simple structure, low cost, and convenient adjustment.

[0050] Moreover, the matching holes 13 are arranged in plurality along the front-to-back direction of the base 1 and in plurality along the left-to-right direction of the base 1, so that the adjustment range of the optical fiber alignment module 3 in the front-to-back direction of the base 1 is larger, thereby making the adjustment more flexible.

[0051] The utility model also provides a biometer, which includes the above optical coherence system 100. The optical coherence system 100 makes the optical path of the light coming out of the collimator 32 longer and occupies less space, which is conducive to miniaturization of the biometer and more convenient to use.

[0052] 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 made using the contents of the specification and drawings of the present invention, or directly or indirectly used in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. An optical coherence system, characterized in that: include: Pedestal; An optical fiber coupling module is arranged on the base; An optical fiber alignment module, disposed on the base and connected to the optical fiber coupling module; A light guide assembly, arranged on the light output side of the optical fiber collimation module; A lens assembly is arranged on the front side of the base; A light splitting component, disposed on the base and located between the light guide component and the lens component; The light emitted from the fiber coupling module can be collimated by the fiber collimating module and then irradiated onto the light guide component, and then transmitted to the light splitting component after being conducted by the light guide component, and then transmitted to the lens component through the light splitting component for emission.

2. The optical coherence system according to claim 1, characterized in that: The fiber optic collimation module is arranged at the rear side of the base, the light guide component is located in front of the fiber optic collimation module, and the light guide component includes a light guide column, which is extended along the front and rear directions of the base, and the front end of the light guide column is arranged close to the splitter component.

3. The optical coherence system according to claim 2, characterized in that: The light guide assembly further includes a light guide pressure plate and a rubber member located between the light guide pressure plate and the light guide column. The light guide pressure plate is connected to the base, and the light guide pressure plate and the base are clamped together on the peripheral side of the light guide column.

4. The optical coherence system according to claim 3, characterized in that: A boss is protruding from the bottom of the base, and a mounting groove is formed on the boss. The light guide column is arranged in the mounting groove and fits with a side wall of the mounting groove. The light guide pressure plate is arranged in the mounting groove and has a first crimping wall and a second crimping wall connected to each other. The first crimping wall is clamped on the other side of the light guide column and connected to the boss, and the second crimping wall is crimped on the top of the light guide column.

5. The optical coherence system according to claim 2, characterized in that: The light splitting component comprises: A first lens, which is opposite to the front end of the light guide column, and a reflective surface of the first lens is arranged obliquely to the light guide column; A second lens is arranged parallel to and spaced from the first lens, and a reflective surface of the second lens is arranged obliquely to the lens assembly; Wherein, the reflective surface of the first lens and the reflective surface of the second lens are arranged opposite to each other.

6. The optical coherence system according to claim 2, characterized in that: The optical fiber coupling module includes a light source module and an optical fiber coupler corresponding to the light source module. The light source module is extended along the front-rear direction of the base. The optical fiber coupler is connected to the optical fiber alignment module through an optical fiber guide wire.

7. The optical coherence system according to claim 6, characterized in that: The light source module is arranged in parallel with the light guide column, and the optical fiber alignment module is arranged at a relative interval to the rear end of the light guide column.

8. The optical coherence system according to claim 1, wherein: The optical fiber collimation module comprises a support seat and a collimator arranged on the support seat. The support seat is movably arranged on the base and has a movable stroke approaching and moving away from the light guide component.

9. The optical coherence system according to claim 8, characterized in that: One of the support seat and the base is provided with a long hole, and the other is provided with a matching hole matching the long hole; the optical coherence system also includes a connecting piece, which is passed through the long hole and the matching hole to fix the support seat at different positions of the base.

10. A biometric measuring instrument, characterized in that: Comprising an optical coherence system as claimed in any one of claims 1 to 9.

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