CN216876330U - Fundus topography optical system - Google Patents
Fundus topography optical system Download PDFInfo
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- CN216876330U CN216876330U CN202123421361.8U CN202123421361U CN216876330U CN 216876330 U CN216876330 U CN 216876330U CN 202123421361 U CN202123421361 U CN 202123421361U CN 216876330 U CN216876330 U CN 216876330U
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Abstract
The utility model provides an optical system for fundus topography, which comprises a large objective lens group, a semi-transparent semi-reflecting lens, a liquid lens I, a fundus imaging lens group, a high-speed camera, a compact porous signal plate, a signal delivery lens group and a liquid lens II, wherein the large objective lens group is arranged on the large objective lens group; the light source irradiates on the eyeground after sequentially passing through a compact porous signal plate, a signal delivery lens group, a liquid lens II, a semi-transparent semi-reflective lens and a large objective lens group to form a light source light path; the pattern on the fundus is collected by a high-speed camera after sequentially passing through a large objective lens group, a semi-transparent semi-reflective lens, a liquid lens I and a fundus imaging lens group to form an image collecting light path. The utility model can be convenient for observers to clearly observe the condition of the eyeground and can also store the observed clear eyeground.
Description
Technical Field
The utility model relates to the technical field of soles of eyes, in particular to an optical system for a sole topographic map.
Background
The fundus picture has a limited small range of the clearest spot, or only one location, the remaining locations being referred to as defocus. For complicated landforms of the eyeground, the visual unevenness of the eyeground in the detected area range leads to the overlapping and mixing of dispersed light spots on the CCD after the division of the compound eye. The optical aberration caused by defocusing is considered to be ideally uniformly distributed on the physical surface of the fundus, and is accumulated in a measured result, so that the error is large.
SUMMERY OF THE UTILITY MODEL
The utility model aims to at least solve the technical problems in the prior art, and particularly innovatively provides a fundus topography optical system.
In order to achieve the above object, the present invention provides a fundus topography optical system, comprising a large objective lens group, a semi-transparent semi-reflecting mirror (spectroscope), a liquid lens I, a fundus imaging lens group, a high-speed camera, a compact multi-aperture signal plate, a signal delivery lens group and a liquid lens II;
the light source irradiates on the eyeground after sequentially passing through a compact porous signal plate, a signal delivery lens group, a liquid lens II, a semi-transparent semi-reflective lens and a large objective lens group to form a light source light path.
The pattern on the fundus is collected by a high-speed camera after sequentially passing through the large objective lens group, the semi-transparent semi-reflective lens, the first liquid lens and the fundus imaging lens group to form an image collecting light path.
In a preferred embodiment of the utility model, the image acquisition optical paths formed by the large objective lens group, the semi-transparent semi-reflecting mirror, the first liquid lens group, the fundus imaging lens group and the high-speed camera are on the same straight line I;
the compact porous signal plate, the signal delivery lens group, the liquid lens II and the semi-transparent semi-reflecting mirror are positioned on the same straight line II;
the angle formed by the first straight line and the second straight line is alpha, and alpha belongs to (0, pi);
the angle between the half-transmitting half-reflecting mirror and the straight line I or the straight line II is beta, and beta belongs to (0, pi/2).
In a preferred embodiment of the utility model, α ═ pi/2 and β ═ pi/4.
In a preferred embodiment of the present invention, the dense aperture signal plate includes a shielding plate, M through-holes penetrating the shielding plate for passing the light source are provided in the shielding plate, and M is a positive integer greater than or equal to 1.
In a preferred embodiment of the present invention, the shape of the through-hole is one of a rectangle, a diamond, a circle, an ellipse, a parallelogram, or any combination thereof.
In a preferred embodiment of the utility model, the diameter of the through-holes is between 0.1mm and 2.5 mm.
In a preferred embodiment of the utility model, the light source is visible light with adjustable light intensity.
In a preferred embodiment of the utility model, the light source is white light.
In a preferred embodiment of the present invention, the first liquid lens and the second liquid lens are liquid lenses capable of manually or automatically adjusting focal lengths.
In a preferred embodiment of the utility model, the high-speed camera further comprises a display screen, wherein a display data end of the display screen is connected with a display data end of the high-speed camera, and images acquired by the high-speed camera are displayed on the display screen, so that an observer can observe the fundus conveniently.
In conclusion, due to the adoption of the technical scheme, the eyeground condition can be observed clearly by an observer conveniently, and the observed clear eyeground can be stored.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is an optical schematic of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The utility model provides an optical system for fundus topography, which comprises a large objective lens group 1, a semi-transparent semi-reflecting mirror 2 (a spectroscope), a liquid lens I5, a fundus imaging lens group 3, a high-speed camera 4, a compact porous signal plate 8, a signal delivery lens group 7 and a liquid lens II 6, as shown in figure 1;
the light source irradiates on the eyeground 9 through a compact porous signal plate 8, a signal delivery lens group 7, a liquid lens II 6, a semi-transparent semi-reflecting mirror 2 and a large objective lens group 1 in sequence to form a light source light path.
The pattern on the fundus 9 is collected by the high-speed camera 4 after passing through the large objective lens group 1, the semi-transparent semi-reflective lens 2, the liquid lens I5 and the fundus imaging lens group 3 in sequence, and an image collecting light path is formed. When the eye of the observed person is under the large objective lens group 1 and the eye fundus image is not clear when the observer observes the eye fundus image, the observer observes the clear eye fundus image by adjusting the focal length of the first liquid lens 5 or/and the second liquid lens 6, and the high-speed camera 4 stores the eye fundus image by a storage button arranged on the operating handle.
In a preferred embodiment of the utility model, the image acquisition optical paths formed by the large objective lens group 1, the semi-transparent semi-reflecting mirror 2, the first liquid lens 5, the fundus imaging lens group 3 and the high-speed camera 4 are on the same straight line;
the compact porous signal plate 8, the signal delivery lens group 7, the liquid lens II 6 and the semi-transparent semi-reflective mirror 2 are positioned on the same straight line II;
the angle formed by the first straight line and the second straight line is alpha, and alpha belongs to (0, pi);
the angle between the half mirror 2 and the straight line I or the straight line II is beta, and beta belongs to (0, pi/2).
In a preferred embodiment of the utility model, α ═ pi/2 and β ═ pi/4.
In a preferred embodiment of the present invention, the dense aperture signal plate 8 includes a shielding plate having M number of through holes penetrating the shielding plate for passing the light source therethrough, where M is a positive integer equal to or greater than 1.
In a preferred embodiment of the present invention, the shape of the through-hole is one of a rectangle, a diamond, a circle, an ellipse, a parallelogram, or any combination thereof.
In a preferred embodiment of the utility model, the diameter of the through-hole is 0.1mm to 2.5 mm.
In a preferred embodiment of the utility model, the light source is visible light with adjustable light intensity.
In a preferred embodiment of the utility model, the light source is white light.
In a preferred embodiment of the present invention, the first liquid lens 5 and the second liquid lens 6 are liquid lenses capable of manual or automatic focal length adjustment.
In a preferred embodiment of the utility model, the high-speed camera further comprises a display screen, wherein a display data end of the display screen is connected with a display data end of the high-speed camera, and images acquired by the high-speed camera are displayed on the display screen, so that an observer can observe the fundus conveniently.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An optical system for fundus topography is characterized by comprising a large objective lens group, a semi-transparent semi-reflecting lens, a liquid lens I, a fundus imaging lens group, a high-speed camera, a compact porous signal plate, a signal delivery lens group and a liquid lens II;
the light source irradiates on the eyeground after sequentially passing through a compact porous signal plate, a signal delivery lens group, a liquid lens II, a semi-transparent semi-reflective lens and a large objective lens group to form a light source light path;
the pattern on the fundus is collected by a high-speed camera after sequentially passing through a large objective lens group, a semi-transparent semi-reflective lens, a liquid lens I and a fundus imaging lens group to form an image collecting light path;
an image acquisition light path formed by the large objective lens group, the semi-transparent semi-reflective lens, the first liquid lens, the fundus imaging lens group and the high-speed camera is on the same straight line I;
the compact porous signal plate, the signal delivery lens group, the liquid lens II and the semi-transparent semi-reflecting mirror are positioned on the same straight line II.
2. An fundus topography optical system according to claim 1, characterized in that the angle between the first and second straight lines is α, α e (0, π);
the angle between the half-transmitting half-reflecting mirror and the straight line I or the straight line II is beta, and beta belongs to (0, pi/2).
3. An fundus topography optical system according to claim 2, wherein α ═ pi/2 and β ═ pi/4.
4. An fundus topography optical system according to claim 1 wherein the dense multi-aperture signal plate comprises a shielding plate, M number of through holes penetrating the shielding plate for passing the light source are provided in the shielding plate, M is a positive integer equal to or greater than 1.
5. An fundus topography optical system according to claim 4, characterized in that the shape of the through hole is one of rectangular, diamond, circular, oval, parallelogram or any combination thereof.
6. An fundus topography optical system according to claim 4, wherein the aperture of the through hole is 0.1mm to 2.5 mm.
7. An fundus topography optical system according to claim 1, wherein the light source is visible light of adjustable light intensity.
8. An fundus topography optical system according to claim 7, wherein the light source is white light.
9. An fundus topography optical system according to claim 1 wherein the first and second liquid lenses are liquid lenses capable of manual or automatic focal length adjustment.
10. An optical system for fundus topography according to claim 1, further comprising a display screen, the display data side of the display screen being connected to the display data side of the high speed camera for displaying images acquired by the high speed camera on the display screen for facilitating the viewer's observation of the fundus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123421361.8U CN216876330U (en) | 2021-12-31 | 2021-12-31 | Fundus topography optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123421361.8U CN216876330U (en) | 2021-12-31 | 2021-12-31 | Fundus topography optical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216876330U true CN216876330U (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123421361.8U Active CN216876330U (en) | 2021-12-31 | 2021-12-31 | Fundus topography optical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216876330U (en) |
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2021
- 2021-12-31 CN CN202123421361.8U patent/CN216876330U/en active Active
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