阅读说明：本技术 光学组件和视网膜成像装置 (Optical assembly and retinal imaging device ) 是由 何益 王清扬 于 2018-09-12 设计创作，主要内容包括：本发明提供一种用于视网膜成像装置的光学组件,所述光学组件包括分光镜、扫描振镜和扫描模块,其中,所述分光镜用于将射向该分光镜的光束的外围部分的光引导至所述扫描振镜并防止将所述光束中部的光到达所述扫描振镜；所述扫描振镜用于将所述分光镜引导至该扫描振镜的光反射至所述扫描模块,并接收所述扫描模块发出的检测光,且所述扫描振镜还用于将所述扫描模块发出的检测光反射至所述分光镜；所述分光镜还用于将所述扫描振镜反射至该分光镜的光引导至用于设置成像模块的成像位置。本发明还提供一种视网膜成像装置。所述视网膜成像装置获得的视网膜图像清晰明显。(The invention provides an optical component for a retina imaging device, which comprises a spectroscope, a scanning galvanometer and a scanning module, wherein the spectroscope is used for guiding light at the peripheral part of a light beam emitted to the spectroscope to the scanning galvanometer and preventing light in the middle of the light beam from reaching the scanning galvanometer; the scanning galvanometer is used for reflecting the light guided to the scanning galvanometer by the spectroscope to the scanning module and receiving the detection light emitted by the scanning module, and the scanning galvanometer is also used for reflecting the detection light emitted by the scanning module to the spectroscope; the spectroscope is also used for guiding the light reflected to the spectroscope by the scanning galvanometer to an imaging position for arranging an imaging module. The invention also provides a retina imaging device. The retina image obtained by the retina imaging device is clear and obvious.)

1. An optical assembly for a retinal imaging device, the optical assembly comprising a beamsplitter, a scanning galvanometer, and a scanning module,

the beam splitter is used for guiding the light of the peripheral part of the light beam emitted to the beam splitter to the scanning galvanometer and preventing the light in the middle of the light beam from reaching the scanning galvanometer;

the scanning galvanometer is used for reflecting the light guided to the scanning galvanometer by the spectroscope to the scanning module and receiving the detection light emitted by the scanning module, and the scanning galvanometer is also used for reflecting the detection light emitted by the scanning module to the spectroscope;

the spectroscope is also used for guiding the light reflected to the spectroscope by the scanning galvanometer to an imaging position for arranging an imaging module.

2. The optical assembly of claim 1, wherein the beam splitter comprises a light reflecting portion and a light transmitting portion, the light reflecting portion is disposed around the light transmitting portion, and a light reflecting surface of the light reflecting portion faces the light reflecting surface of the scanning galvanometer so as to reflect the light irradiated by the light source module on the light reflecting surface of the light reflecting portion to the light reflecting surface of the scanning galvanometer.

3. The optical assembly as claimed in claim 2, wherein the beam splitter includes a first beam splitter body and a first reflective layer, a light-transmitting hole penetrating through the reflective layer in a thickness direction is formed in a middle portion of the first reflective layer, the first beam splitter body includes a first functional surface facing the reflective surface of the scanning galvanometer, the first reflective layer is disposed on the first functional surface, a portion of the first beam splitter body corresponding to the light-transmitting hole is formed as the light-transmitting portion, and the imaging position and the scanning galvanometer are respectively located on two sides of the beam splitter.

4. The optical assembly according to claim 3, wherein a portion of the first spectroscope body corresponding to the light-transmitting hole is formed as a through-hole.

5. The optical assembly of claim 1, wherein the beam splitter includes a light reflecting portion and a light transmitting portion, the light transmitting portion is disposed around the light reflecting portion, the imaging position and the scanning galvanometer are located on a same side of the beam splitter, the scanning galvanometer is capable of reflecting light emitted from the scanning module to the light reflecting portion, and the light reflecting portion of the beam splitter is capable of reflecting light reflected by the scanning galvanometer to the light reflecting portion to the imaging position.

6. The optical assembly according to claim 5, wherein the beam splitter includes a second beam splitter body and a second reflective layer, the second beam splitter body includes a second functional surface facing the reflective surface of the scanning galvanometer, the second reflective layer is disposed on the second functional surface and located in a middle of the second functional surface, a portion of the second beam splitter body surrounding the reflective layer is light-transmissive and is formed as the light-transmissive portion, and the second reflective layer and a portion of the second beam splitter body attached to the second reflective layer are formed as the reflective portion.

7. A retinal imaging device comprising an optical assembly, wherein the optical assembly is as claimed in any one of claims 1 to 6.

8. The retinal imaging device of claim 7 further comprising an imaging module disposed at the imaging location to image light directed to the imaging module using the beam splitter.

9. The retinal imaging device according to claim 7 or 8, wherein the beam splitter is the beam splitter according to any one of claims 2 to 4, and the retinal imaging device further comprises a light source module, and the light source module and the scanning galvanometer are located on the same side of the beam splitter.

10. The retinal imaging device according to claim 7 or 8, wherein the beam splitter is the beam splitter according to claim 5 or 6, the retinal imaging device further comprises a light source module, and the light source module and the scanning galvanometer are respectively located at two sides of the beam splitter.

Technical Field

The present invention relates to the field of medical devices, in particular to an optical assembly for a retinal imaging device and a retinal imaging device comprising the optical assembly.

Background

The retina image of human eyes is indispensable important information in ophthalmologic diagnosis and treatment, and the real-time tracking of the shape change of the fundus retina is helpful for early diagnosis and prevention of body diseases.

Generally, a retinal imaging device includes an optical assembly and an imaging module, wherein the optical assembly includes a light source module, a beam splitter, a scanning galvanometer, and a scanning module. The light source module emits light towards the spectroscope, the spectroscope reflects the light emitted by the light source to the scanning galvanometer, the scanning galvanometer reflects the light to the scanning module, and the light passing through the scanning module is emitted to human eyes. The light reflected by human eyes is reflected to the spectroscope by the scanning galvanometer after passing through the scanning module, then passes through the spectroscope to reach the imaging module, and is imaged by the imaging module.

However, when imaging is performed using a retinal imaging device, a clear and distinct retinal image cannot be obtained.

Therefore, how to form clear and obvious retina images by using a retina imaging device becomes a technical problem to be solved in the field.

Disclosure of Invention

It is an object of the present invention to provide an optical assembly for a retinal imaging device and a retinal imaging device including the optical assembly, with which a clear and distinct retinal image can be obtained.

To achieve the above object, as one aspect of the present invention, there is provided an optical assembly for a retinal imaging device, the optical assembly including a beam splitter, a scanning galvanometer, and a scanning module, wherein,

the beam splitter is used for guiding the light of the peripheral part of the light beam emitted to the beam splitter to the scanning galvanometer and preventing the light in the middle of the light beam from reaching the scanning galvanometer;

the scanning galvanometer is used for reflecting the light guided to the scanning galvanometer by the spectroscope to the scanning module and receiving the detection light emitted by the scanning module, and the scanning galvanometer is also used for reflecting the detection light emitted by the scanning module to the spectroscope;

the spectroscope is also used for guiding the light reflected to the spectroscope by the scanning galvanometer to an imaging position for arranging an imaging module.

Preferably, the beam splitter includes a light reflecting portion and a light transmitting portion, the light reflecting portion is disposed around the light transmitting portion, and a light reflecting surface of the light reflecting portion faces the light reflecting surface of the scanning galvanometer, so as to reflect the light irradiated by the light source module on the light reflecting surface of the light reflecting portion to the light reflecting surface of the scanning galvanometer.

Preferably, the spectroscope includes first spectroscope body and first reflection of light layer, the middle part of first reflection of light layer is formed with and runs through the light trap of this reflection of light layer along thickness direction, first spectroscope body includes the orientation the first functional surface of the reflection of light face of scanning galvanometer, first reflection of light layer sets up on the first functional surface, just on the first spectroscope body with the part that the light trap corresponds forms the printing opacity portion, the imaging position with scanning galvanometer is located respectively the both sides of spectroscope.

Preferably, a portion of the first beam splitter body corresponding to the light transmission hole is formed as a through hole.

Preferably, the spectroscope includes a light reflecting portion and a light transmitting portion, the light transmitting portion is disposed around the light reflecting portion, the imaging position and the scanning galvanometer are located on the same side of the spectroscope, the scanning galvanometer can reflect the light emitted by the scanning module to the light reflecting portion, and the light reflecting portion of the spectroscope can reflect the light reflected by the scanning galvanometer to the light reflecting portion to the imaging position.

Preferably, the spectroscope includes second spectroscope body and second reflection of light layer, the second spectroscope body includes the orientation the second functional surface of the reflection of light face of scanning mirror that shakes, the second reflection of light layer sets up on the second functional surface, and is located the middle part of second functional surface, surround on the second spectroscope body the part of reflection of light layer can the printing opacity, and forms into the printing opacity portion, the second reflection of light layer with on the second spectroscope body with the part of second reflection of light layer laminating forms into reflection of light portion.

As a second aspect of the present invention, there is provided a retinal imaging device comprising an optical component, wherein the optical component is the above optical component provided by the present invention.

Preferably, the retina imaging apparatus further comprises an imaging module disposed at the imaging position to image light directed to the imaging module by the beam splitter.

Preferably, the retina imaging device further comprises a light source module, and the light source module and the scanning galvanometer are located on the same side of the spectroscope.

Preferably, the retina imaging device further comprises a light source module, and the light source module and the scanning galvanometer are respectively located at two sides of the spectroscope.

When the retina detection device comprising the optical assembly is used for retina detection, the light source module is used for emitting detection beams, the imaging module is arranged at the imaging position, and human eyes are located at the detected position. Under the action of the beam splitter, only the light in the peripheral portion of the detection beam is directed to the examined location, entering the retina from the edge of the cornea of the eye and illuminating the retina. Since the cornea is not illuminated, the light directed from the eye to the scanning module also does not include light reflected from the cornea, thereby reducing stray light in the imaging light.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of a first embodiment of an optical assembly provided by the present invention;

FIG. 2a is a schematic diagram of a beam splitter in the optical assembly shown in FIG. 1;

FIG. 2b is a cross-sectional view of the beamsplitter shown in FIG. 2 a;

FIG. 3 is a schematic structural diagram of a second embodiment of an optical assembly provided by the present invention;

FIG. 4a is a schematic view of a beam splitter in the optical assembly shown in FIG. 3;

fig. 4b is a cross-sectional view of the beamsplitter of fig. 4 a.

Description of the reference numerals

100: the light source module 200: spectroscope

210: light-transmitting portion 220: light reflecting part

300: scanning galvanometer 400: scanning module

500: human eye 600: imaging module

221: first light-reflecting layer 222: first spectroscope body

223: second light-reflecting layer 225: second spectroscope body

224: the part of the second spectroscope body, which is attached to the second reflecting layer

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

The inventor of the present invention has found that the reason why the existing retinal imaging device cannot obtain a clear and distinct retinal image is as follows:

the human retina has extremely low reflectivity to light, about 10 of the incident light intensity^-3To 10^-4Magnitude. The back reflection light of the optical element in the retina imaging device and the back reflection light of the cornea of the eye are about 10 of the incident light intensity^-1To 10^-2Magnitude. It can be seen that the light intensity of the light reflected back from the optical elements of the retinal imaging device and the light reflected from the cornea of the eye is much greater than the light intensity of the light reflected from the retina. The light received by the imaging module of the retinal imaging device includes light reflected by the retina, light reflected by the cornea of the eye, and retroreflection light of the optical element (the light reflected by the cornea of the eye and the retroreflection light of the optical element are collectively referred to as stray light here), which causes the imaging to be greatly affected by the stray light, and leads to the stray lightResulting in poor imaging results.

In view of the above, the present invention provides an optical assembly for a retinal imaging device, as shown in fig. 1 and 3, the optical assembly including a beam splitter 200, a scanning galvanometer 300, and a scanning module 400.

In the present invention, the beam splitter 200 serves to guide light of a peripheral portion of the light beam directed to the beam splitter 200 to the scanning galvanometer 300 and prevent light of a central portion of the light beam from reaching the scanning galvanometer 300. It is easily understood that the light beam is generated by the light source module 100.

The scanning galvanometer 300 is configured to reflect the light guided to the scanning galvanometer 300 by the beam splitter 200 to the scanning module 400, and receive the detection light emitted by the scanning module 400, and the scanning galvanometer 300 is further configured to reflect the detection light emitted by the scanning module 400 to the beam splitter 200. Accordingly, the beam splitter 200 is also used to guide the light reflected by the scanning galvanometer 300 to the beam splitter 200 to an imaging position for setting an imaging module.

The optical assembly is applied to a retina detection device, and an imaging module 600 is required to be arranged at the imaging position.

When the retina detection device comprising the optical assembly is used for retina detection, the light source module 100 is used for emitting a detection light beam, the imaging module 600 is arranged at an imaging position, and the human eye 500 is arranged at a detected position. Under the action of the beam splitter 200, only light in the peripheral portion of the detection beam is directed to the examined location, entering the retina from the edge of the cornea of the eye and illuminating the retina. Since the central region of the cornea is not illuminated, the light directed from the human eye 500 to the scanning module 400 also does not include light reflected from the cornea, thereby reducing stray light in the imaging light.

In addition, since the middle portion of the light beam is not provided with light, when the light beam passes through the scanning module 400, the optical elements corresponding to the middle portion of the light beam in the scanning module 400 are not reflected backward, and stray light in the imaging light is further reduced. Because the stray light in the imaging light is reduced, the imaging module is not influenced any more during imaging, and a clear and obvious retina image can be obtained.

In the present invention, the specific structure of the spectroscope 200 is not particularly specified.

In the embodiment shown in fig. 2a, the beam splitter 200 includes a light reflecting portion 220 and a light transmitting portion 210, and the light reflecting portion 220 is disposed around the light transmitting portion 210. The beam splitter shown in fig. 2 is suitable for the retinal imaging device shown in fig. 1, and as shown in fig. 1, the light source module 100 and the scanning galvanometer 300 are located on the same side of the beam splitter 200, and the light reflecting surface of the light reflecting part faces the light reflecting surface of the scanning galvanometer 300, so as to reflect the light irradiated by the light source module 100 on the light reflecting surface of the light reflecting part to the light reflecting surface of the scanning galvanometer 300.

In fig. 1, a solid arrow indicates a detection light emitted from the light source module 100 and guided to the scanning module 400 by the beam splitter 200 and the scanning galvanometer 300, and a dashed arrow indicates an imaging light emitted from the scanning module 400 and guided to the imaging module 600 by the scanning galvanometer 300 and the beam splitter 200.

A part of the light emitted from the light source module 100 is irradiated on the light reflecting portion 220, and is reflected by the light reflecting portion 220 toward the scanning galvanometer 300, and another part of the light passes through the light transmitting portion 210 and does not reach the scanning galvanometer 300. In other words, in the light beam emitted by the light source module 100, the light at the center of the light beam is transmitted and lost, the light at the periphery of the light beam is reflected to the scanning galvanometer 300 through the light reflecting portion 220, the light beam reflected by the scanning galvanometer 300 to the scanning module 400 is absent in the central area, and the light beam transmitted by the scanning module 400 to reach the human eye 500 is also absent in the central area. Therefore, the optical lens at the center of the scanning module does not undergo back reflection. Because the central part of the light beam is lack of light, the cornea of the eye can not be irradiated, and the phenomenon of light reflection can not occur. Light is directed into the human eye from the edge of the cornea and illuminates the retina.

The imaging beam reflected from the retina returns to the beam splitter 200 along the original path, is transmitted through the light-transmitting portion of the beam splitter 200, and finally reaches the imaging module 600. The light received by the imaging module 600 includes light reflected by the retina, light reflected by the cornea of the eye, and backward reflected light generated by the lens at the central portion of the scanning module, that is, stray light is less in the light received by the imaging module 600, so that a clear and distinct retina image can be obtained by using the imaging module 600.

In the present invention, there is no particular requirement on how the beam splitter shown in figure 2a is formed. For example, as shown in fig. 2b, the beam splitter may include a first beam splitter body 222 and a first reflective layer 221, and a light transmission hole penetrating the first reflective layer 221 in a thickness direction is formed in a middle portion of the first reflective layer 221. The first beam splitter body 222 includes a first functional surface facing the reflective surface of the scanning galvanometer, the first reflective layer 221 is disposed on the first functional surface, and a portion of the first beam splitter body 222 corresponding to the light transmission hole is formed as a light transmission portion 210.

In the present invention, the specific structure of the light-transmitting portion 210 is not particularly limited, and for example, the light-transmitting portion may be a through hole, that is, a portion of the first beam splitter body 222 corresponding to the light-transmitting hole on the first light reflecting layer is formed as a through hole.

In the present invention, the cross section of the light-transmitting portion 210 may be any one of circular, square, and rectangular.

In the embodiment shown in FIG. 3, the imaging location and scanning galvanometer 300 are located on the same side of beamsplitter 200. And the light source module 100 and the scanning galvanometer 300 are respectively located at two sides of the beam splitter 200. Accordingly, as shown in fig. 4a, the beam splitter 200 includes a light reflecting portion 220 and a light transmitting portion 210, and the light transmitting portion 210 is disposed around the light reflecting portion 220, and the light reflecting surface of the light reflecting portion faces the light reflecting surface of the scanning galvanometer 300. As shown in fig. 3, the imaging position and the scanning galvanometer 300 are located on the same side of the beam splitter 200, and the light source module 100 and the scanning galvanometer 300 are respectively located on two sides of the beam splitter 200. The scanning galvanometer 300 can reflect the light emitted by the scanning module 400 to the light reflecting portion, and the light reflecting portion of the beam splitter 200 can reflect the light reflected by the scanning galvanometer 300 to the light reflecting portion to the imaging position.

In fig. 3, a solid arrow indicates a detection light emitted from the light source module 100 and guided to the scanning module 400 by the beam splitter 200 and the scanning galvanometer 300, and a dashed arrow indicates an imaging light emitted from the scanning module 400 and guided to the imaging module 600 by the scanning galvanometer 300 and the beam splitter 200.

When the light source module 100 emits light toward the beam splitter 200, the light beam passes through the light-transmitting portion to reach the peripheral portion of the scanning galvanometer 300, and the light in the middle of the light beam is blocked by the light-reflecting portion 220 and does not irradiate onto the scanning galvanometer 300. Therefore, the light reflected by the scanning galvanometer 300 to the scanning module 300 is also a light beam without light in the middle. Because the central part of the light beam is lack of light, the cornea of the eye can not be irradiated, and the phenomenon of light reflection can not occur. Light is directed into the human eye from the edge of the cornea and illuminates the retina.

The imaging light beam reflected from the retina returns to the beam splitter 200 along the original path, is reflected by the light reflecting portion of the beam splitter 200, and finally reaches the imaging module 600. The light received by the imaging module 600 includes light reflected by the retina, light reflected by the cornea of the eye, and backward reflected light generated by the lens at the central portion of the scanning module, that is, stray light is less in the light received by the imaging module 600, so that a clear and distinct retina image can be obtained by using the imaging module 600.

In the present invention, no special requirements are made on the specific structure of the beam splitter in fig. 4 a. As shown in fig. 4b, the beam splitter includes a second beam splitter body 225 and a second reflective layer 223, the second beam splitter body 225 includes a second functional surface facing the reflective surface of the scanning galvanometer, the second reflective layer 223 is disposed on the second functional surface and located in the middle of the second functional surface, a portion of the second beam splitter body 225 surrounding the second reflective layer 223 is capable of transmitting light and is formed into a light transmitting portion 210, and the second reflective layer 223 and a portion 224 of the second beam splitter body attached to the second reflective layer are formed into a reflective portion 220.

As a second aspect of the present invention, there is provided a retinal imaging device, as shown in fig. 1 and 3, including an optical component, wherein the optical component is the above optical component provided by the present invention.

As described above, the light guided to the scanning galvanometer 300 by the beam splitter 200 is a light beam without light in the middle and with light on the periphery, and the light reflected by the scanning galvanometer 300 to the scanning module 400 is also a light beam without light in the middle. Because the central part of the light beam is lack of light, the cornea of the eye can not be irradiated, and the phenomenon of light reflection can not occur. Light is directed into the human eye from the edge of the cornea and illuminates the retina.

The imaging beam reflected from the retina returns to the beam splitter 200 along the original path, propagates through the central portion of the beam splitter 200, and finally reaches the imaging module 600. The light received by the imaging module 600 includes light reflected by the retina, light reflected by the cornea of the eye, and backward reflected light generated by the lens at the central portion of the scanning module, that is, stray light is less in the light received by the imaging module 600, so that a clear and distinct retina image can be obtained by using the imaging module 600.

Preferably, the retinal imaging apparatus further includes an imaging module 600, and the imaging module 600 is disposed at the imaging position to image the light guided to the imaging module 600 by the beam splitter 200.

In the present invention, the specific structure of the imaging module 600 is not particularly limited. For example, the imaging module 600 may include a condenser objective lens to focus an imaging beam guided to the imaging module 600 by the beam splitter 200, a photoelectric conversion unit to convert a received optical signal into an electrical signal, and an imaging unit to generate an image based on the electrical signal.

The retinal imaging device may include a light source module 100, and the relative positions of the light source module 100, the scanning galvanometer 300 and the spectroscope 200 are set according to the specific structure of the spectroscope 200.

Preferably, when the beam splitter is the beam splitter shown in fig. 2b, as shown in fig. 1, the light source module 100 and the scanning galvanometer 300 are located on the same side of the beam splitter 300.

When the beam splitter is the beam splitter shown in fig. 4a, the light source module 100 and the scanning galvanometer 300 are respectively located at two sides of the beam splitter 200.

The operation principle and the beneficial effects of the retinal imaging devices of the two embodiments have been described in detail above, and are not described in detail here.

In the present invention, the light source module 100 may generate a line beam. In the embodiment shown in fig. 1 and 3, the light reflecting surface of the light reflecting portion of the beam splitter 200 and the exit optical axis of the light source module 100 form an angle of 45 °, and the light reflecting surface of the scanning galvanometer 300 and the light reflecting surface of the light reflecting portion of the beam splitter 200 are parallel and opposite to each other.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.