阅读说明：本技术 一种眼科测量设备用的参考臂装置 (Reference arm device for ophthalmologic measuring apparatus ) 是由 易永忠 杨里珍 于 2020-06-10 设计创作，主要内容包括：本发明涉及一种眼科测量设备用的参考臂装置,包括旋转支座、若干个角反射器和若干个反射镜,所述角反射器分别安装在所述旋转支座上,所有所述反射镜距离所述旋转支座的距离均不相同；所述反射镜的数量与所述角反射器的数量相同,每一所述角反射器分别各自对应一个所述反射镜,射入光线射向所述角反射器后,经过所述角反射器反射后反射出与射入光线方向相反的射出光线,所述射出光线再射向与该角反射器对应的反射镜上,所有所述反射镜均与所述射入光线垂直。用以解决现有技术的参考臂光程改变量短、不能连续、实时地改变光程等技术问题。(The invention relates to a reference arm device for ophthalmologic measuring equipment, which comprises a rotating support, a plurality of corner reflectors and a plurality of reflectors, wherein the corner reflectors are respectively arranged on the rotating support, and the distances from the reflectors to the rotating support are different; the quantity of the reflectors is the same as that of the corner reflectors, each corner reflector corresponds to one reflector, incident light rays are emitted to the corner reflectors and reflected by the corner reflectors to emit emergent light rays in the direction opposite to that of the incident light rays, the emergent light rays are emitted to the reflectors corresponding to the corner reflectors, and all the reflectors are perpendicular to the incident light rays. The method is used for solving the technical problems that the reference arm in the prior art is short in optical path change quantity and cannot continuously change the optical path in real time.)

1. A reference arm device for an ophthalmologic measuring apparatus, characterized in that: the device comprises a rotating support, a plurality of corner reflectors and a plurality of reflectors, wherein the corner reflectors are respectively arranged on the rotating support, and the distances from the reflectors to the rotating support are different; the quantity of the reflectors is the same as that of the corner reflectors, each corner reflector corresponds to one reflector, incident light rays are emitted to the corner reflectors and reflected by the corner reflectors to emit emergent light rays in the direction opposite to that of the incident light rays, the emergent light rays are emitted to the reflectors corresponding to the corner reflectors, and all the reflectors are perpendicular to the incident light rays.

2. A reference arm arrangement for an ophthalmic measuring device according to claim 1, characterized in that: all the corner reflectors are obliquely arranged on the rotating support respectively, included angles between the bottom surfaces of all the corner reflectors and the upper surface of the rotating support are different, and the installation heights of all the reflectors are different, so that the same incident light can be incident on different corner reflectors, and the reflected emergent light can be incident on the reflectors corresponding to the corner reflectors.

3. A reference arm arrangement for an ophthalmic measuring device according to claim 2, characterized in that: the corner reflectors and the reflectors are respectively arranged, and the two corner reflectors are respectively arranged on the left side and the right side of the rotating support.

4. A reference arm arrangement for an ophthalmic measuring device according to claim 3, characterized in that: the two corner reflectors are respectively a first corner reflector and a second corner reflector, and the two reflectors are respectively a first reflector and a second reflector; the included angle between the bottom surface of the first corner reflector and the upper surface of the rotating support is 50 degrees, and the included angle between the bottom surface of the second corner reflector and the upper surface of the rotating support is 20 degrees; the incident light rays are reflected by the first corner reflector and then vertically emitted to the first reflector, and the incident light rays are reflected by the second corner reflector and then vertically emitted to the second reflector.

5. A reference arm arrangement for an ophthalmic measuring device according to claim 2, characterized in that: the corner reflector comprises a lens support, three reflection lenses which are mutually perpendicular in pairs are mounted on the lens support, and the three reflection lenses are arranged in opposite directions.

6. The reference arm apparatus for an ophthalmic measuring device of claim 5, wherein: the rotary support is provided with mounting seats for mounting the corner reflectors, each mounting seat is provided with one corner reflector, the top surface of each mounting seat and the upper surface of the rotary support have a certain included angle, and the bottom surfaces of the corner reflectors are parallel to the top surfaces of the mounting seats after mounting.

7. The reference arm apparatus for an ophthalmic measuring device of claim 6, wherein: the lower end of the rotary support is connected with a shaft sleeve, and the rotary support is connected with a motor through the shaft sleeve.

8. The reference arm apparatus for an ophthalmic measuring device of claim 6, wherein: the reflector plate of the corner reflector is adhered to the lens support through glue, and the corner reflector is adhered to the mounting seat through glue.

Technical Field

The invention relates to the field of medical instruments, in particular to a reference arm device for an ophthalmologic measuring device.

Background

The length measuring instrument for the anterior ocular segment and the axial length of the eye is used for further calibrating the length according to the interference principle of two beams of light to obtain the length distance. The interference of the two beams is within the range of coherent length, and in order to influence factors such as resolution in ophthalmic products, low-coherence light sources are generally adopted, the coherent length is only in the order of micrometers, and the coherent length is very small relative to the eye axis length of twenty-few millimeters, so that a structure capable of continuously changing the optical path is needed to be used as a reference arm to match the optical path of the other beam of light so as to perform interference measurement on the anterior segment of the eye and the eye axis length, so that interference signals can be provided on the anterior segment of the eye and the retina. Most of the reference arms in the market at present are used for OCT, the optical path which can be continuously changed is short, the change amount of the optical path in the air is less than 30mm, the optical path can not be continuously and real-timely changed, and the requirements on machining tolerance and assembly tolerance are very high.

Disclosure of Invention

The present invention is directed to overcome the above-mentioned deficiencies of the prior art, and to provide a reference arm device for an ophthalmologic measuring apparatus, which is used to solve the technical problems of the prior art, such as short optical path change amount of the reference arm, and incapability of continuously and real-time changing the optical path.

The purpose of the invention is realized by the following technical scheme:

a reference arm device for an ophthalmologic measuring apparatus comprises a rotary support, a plurality of corner reflectors and a plurality of reflectors, wherein the corner reflectors are respectively mounted on the rotary support, and the distances from the reflectors to the rotary support are different; the quantity of the reflectors is the same as that of the corner reflectors, each corner reflector corresponds to one reflector, incident light rays are emitted to the corner reflectors and reflected by the corner reflectors to emit emergent light rays in the direction opposite to that of the incident light rays, the emergent light rays are emitted to the reflectors corresponding to the corner reflectors, and all the reflectors are perpendicular to the incident light rays.

Specifically, all the corner reflectors are obliquely installed on the rotating support respectively, included angles between the bottom surfaces of all the corner reflectors and the upper surface of the rotating support are different, and installation heights of all the reflectors are different, so that after the same incident light beam is incident on different corner reflectors, the reflected light beam can be incident on the reflector corresponding to the corner reflector.

The corner reflectors and the reflectors are respectively arranged, and the two corner reflectors are respectively arranged on the left side and the right side of the rotating support.

The two corner reflectors are respectively a first corner reflector and a second corner reflector, and the two reflectors are respectively a first reflector and a second reflector; the included angle between the bottom surface of the first corner reflector and the upper surface of the rotating support is 50 degrees, and the included angle between the bottom surface of the second corner reflector and the upper surface of the rotating support is 20 degrees; the incident light rays are reflected by the first corner reflector and then vertically emitted to the first reflector, and the incident light rays are reflected by the second corner reflector and then vertically emitted to the second reflector.

The corner reflector comprises a lens support, three reflection lenses which are mutually perpendicular in pairs are mounted on the lens support, and the three reflection lenses are arranged in opposite directions.

The rotary support is provided with mounting seats for mounting the corner reflectors, each mounting seat is provided with one corner reflector, the top surface of each mounting seat and the upper surface of the rotary support have a certain included angle, and the bottom surfaces of the corner reflectors are parallel to the top surfaces of the mounting seats after mounting.

The lower end of the rotary support is connected with a shaft sleeve, and the rotary support is connected with a motor through the shaft sleeve.

The reflector plate of the corner reflector is adhered to the lens support through glue, and the corner reflector is adhered to the mounting seat through glue.

The invention has the following beneficial effects: the invention discloses a reference arm device for ophthalmologic measuring equipment, which comprises a plurality of corner reflectors arranged on a rotating support, wherein each corner reflector is correspondingly provided with a reflector, and the distances between each reflector and the rotating support are different, so that after a light source emits incident light, the incident light is reflected by the corner reflectors and then emitted to the corresponding reflectors in the opposite direction to the incident light, and the reflectors are vertical to the incident light, namely the emitted light, so that the reflectors can reflect the light and the light can return to a light source end according to the original way. When the incident light rays irradiate into a corner reflector, the optical path can be adjusted within the adjusting range of the corner reflector by rotating the rotating support; the rotating support is rotated continuously, the incident light can be switched to enter the next corner reflector, and the optical path can be adjusted within the adjusting range of the corner reflector; because the distance between each reflector and the rotating support is different, the adjusting range of each corner reflector to the optical path is also different, and the adjusting range to the optical path can be effectively enlarged by overlapping the adjusting ranges of the plurality of corner reflectors. In the process of continuous rotation of the rotating support, the change of the optical path is continuous, and the optical path can be changed only by rotating the rotating support, so that the continuous and real-time change of the optical path is realized. In addition, the precision of the reference arm is the precision of the corner reflector, namely the parallelism of the incident light and the emergent light, the angle relation between the corner reflector and the rotating support is not strictly required, as long as the light reflected by the corner reflector can be hit on the corresponding reflector, and the shaking of the motor does not influence the result precision, so that the assembly precision requirement and the shaking balance requirement of the motor are greatly reduced.

Drawings

FIG. 1 is a schematic view of an overall structure of a reference arm device according to the present embodiment;

FIG. 2 is a second schematic view of the overall structure of the reference arm device of the present embodiment;

FIG. 3 is a schematic structural diagram of a rotating support according to the present embodiment;

FIG. 4a is a schematic structural diagram of the first corner reflector of this embodiment at a starting position;

FIG. 4b is a schematic structural diagram of the first corner reflector of this embodiment in the end position;

fig. 5a is a schematic structural diagram of the second corner reflector of this embodiment at a start position;

fig. 5b is a schematic structural diagram of the second corner reflector of this embodiment at the termination position.

The specific structure in the figure illustrates that: the device comprises a rotating support 1, an 11 shaft sleeve, a 12 mounting seat, a 2 first corner reflector, a 21 lens bracket, a 22 reflecting lens, a 3 second corner reflector, a 4 first reflector, a 5 second reflector and a 6 light source.

Detailed Description

The present invention will be described in further detail with reference to the following examples, which are given in the accompanying drawings.

Referring to fig. 1-3, a reference arm device for an ophthalmologic measuring apparatus includes a rotary support 1, a corner reflector and a reflector, wherein a shaft sleeve 11 is connected to a lower end of the rotary support 1, the rotary support 1 is connected with a motor through the shaft sleeve 11, and the rotary support 1 can be driven to rotate by the motor during operation. The rotary support 1 is provided with mounting seats 12 for mounting the corner reflectors, each mounting seat 12 is provided with one corner reflector, the top surface of each mounting seat 12 and the upper surface of the rotary support 1 have certain included angles, and the bottom surfaces of the corner reflectors are parallel to the top surfaces of the mounting seats 12 after mounting. The surface of the corner reflector connected with the mounting base 12 is a plane, so that the inclination angle of the corner reflector after being mounted is controlled by controlling the inclination angle of the upper surface of the mounting base 12 during production design. The corner reflector is glued to the mounting 12.

In this embodiment, the corner reflector includes a lens support 21, three mutually perpendicular two-by-two reflecting lenses 22 are mounted on the lens support 21, and the three reflecting lenses 22 are oppositely arranged. By utilizing the principle of a corner reflector, a beam of light is projected to three mirror surfaces which form right angles with each other, and the light can be emitted out in the direction opposite to the original light after three times of reflection. In particular, the mirror plate 22 of the corner reflector is glued to the mirror plate holder 21.

In this embodiment, a plurality of mounting seats 12 for mounting the corner reflectors are arranged on the rotating support 1, and included angles between the bottom surfaces of all the corner reflectors and the upper surface of the rotating support 1 are different; a plurality of reflectors are arranged outside the rotating support 1, and the distances from the reflectors to the rotating support 1 are different; the number of the reflectors is the same as that of the corner reflectors, each corner reflector corresponds to one reflector, incident light rays are emitted to the corner reflectors and reflected by the corner reflectors to emit emergent light rays in the direction opposite to that of the incident light rays, and the emergent light rays are emitted to the reflectors corresponding to the corner reflectors. In addition, all the reflectors are perpendicular to the incident light, i.e., perpendicular to the emergent light, so that the reflectors can reflect the light and the light is returned to the light source end as it is.

Specifically, in this embodiment, two corner reflectors and two reflecting mirrors are respectively provided, the two corner reflectors are respectively a first corner reflector 2 and a second corner reflector 3, and the two reflecting mirrors are respectively a first reflecting mirror 4 and a second reflecting mirror 5; the included angle between the bottom surface of the first corner reflector 3 and the upper surface of the rotating support 1 is 50 degrees, and the included angle between the bottom surface of the second corner reflector 3 and the upper surface of the rotating support 1 is 20 degrees; the first reflector 4 is higher than the second reflector 5, and the first reflector 4 is closer to the rotating support 1 than the second reflector 5. Referring to fig. 2, the incident light is reflected by the first corner reflector 2 and then vertically emitted to the first reflector 4; referring to fig. 3, the incident light is reflected by the second corner reflector 3 and then perpendicularly irradiated to the second reflecting mirror 5.

The working principle of the embodiment is as follows: referring to fig. 4a-4b, when the rotating support 1 rotates to the position shown in fig. 4a, it is assumed that the rotating support is at the initial position of the first corner reflector 2 (i.e. the shortest optical path value after being reflected by the first corner reflector), and at this time, the light emitted by the light source 6 is directed to the first corner reflector 2, and it is assumed that the optical path is Xmm after passing through the first corner reflector 2 and the first mirror reflection 4 (at this time, the position of the light source and the installation angle of the first corner reflector are fixed, and the specific optical path value is determined by the distance between the first mirror and the rotating support), when the first corner reflector 2 rotates clockwise 43 ° to the position shown in fig. 4b, it is at the end position of the first corner reflector 2 (i.e. the longest optical path value after being reflected by the first corner reflector), and it is calculated by measurement, and at this time, the optical path is (X +30) mm, that it is, the adjustable optical path adjustment amount is 30 mm.

Continuing to rotate the rotating holder 1, the light rays are projected onto the second corner reflector 3, which, with reference to figures 5a-5b, when the rotating holder 1 is rotated to the position shown in fig. 5a, which is at the starting position of the second corner reflector 3 (i.e. the shortest optical path length value after reflection by the second corner reflector), the light emitted by the light source is projected towards the second corner reflector 5, and after the light is assumed to be reflected by the second corner reflector 3 and the second reflector 5, the optical path is (X +30) mm (at the moment, the position of the light source and the installation angle of the second corner reflector are fixed, the specific optical path value is determined by the distance between the second reflector and the rotating support), the starting position of the second corner reflector 3 and the ending position of the first corner reflector 2 are adjusted and overlapped, when the first corner reflector 2 and the second corner reflector 3 are switched, the change of the optical path is continuous without overlapping and gaps. When the second corner reflector 3 rotates by 34 ° clockwise to the position shown in fig. 5b, the optical path at this time is at the termination position of the second corner reflector 3 (i.e. the longest optical path value after reflection by the second corner reflector), and is obtained through measurement and calculation, the optical path at this time is (X +50) mm, that is, through front-back comparison, after reflection by the second corner reflector 3 and the second reflecting mirror 5, the adjustable optical path adjustment amount is 20 mm.

Therefore, the variation of the optical path length from the starting position of the first corner reflector 2 to the ending position of the second corner reflector 3 is 50mm, that is, in the embodiment, the optical path length can be continuously adjusted within 0-50mm, and compared with the optical path length adjustment amount of the prior art which is less than 30mm, the optical path length adjustment amount of the embodiment is wider and can be continuously adjusted.

Of course, the adjustment amount of the optical path may be further changed by changing the number of corner reflectors provided on the rotary holder and the installation angles of the corner reflectors, and the scope of the present invention is not limited to the above-described installation number, angles and optical path adjustment amounts.

The above description is only a preferred embodiment of the present invention, but not intended to limit the scope of the invention, and all simple equivalent changes and modifications made in the claims and the description of the invention are within the scope of the invention.