CN208573723U - A kind of model eye for eyeground detection - Google Patents
A kind of model eye for eyeground detection Download PDFInfo
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- CN208573723U CN208573723U CN201721411973.XU CN201721411973U CN208573723U CN 208573723 U CN208573723 U CN 208573723U CN 201721411973 U CN201721411973 U CN 201721411973U CN 208573723 U CN208573723 U CN 208573723U
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- eyeglass
- model eye
- egative film
- eyeground
- resolution ratio
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Abstract
The utility model devises a kind of model eye for eyeground detection.The model glasses head is made of three pieces optical lens, a piece of egative film with visual field scale and resolution ratio line pair, model eye is followed successively by the first eyeglass, the second eyeglass, third eyeglass, egative film from the object side to the image side, the mutual adjacent surface of first eyeglass, the second eyeglass, third eyeglass, egative film is close to, and the visual field angle staff and resolution ratio line are to being arranged in the cambered surface of egative film front.Refringence between optical texture and optical mirror slip or lens set in the utility model simulates practical human eye dioptric system, the visual field scale and resolution ratio line delineated on egative film substitute the method in ISO10940 for detecting the field angle and resolution ratio that check class medical instrument using fundus camera as the fundus imaging of representative to the index request in foundation ISO10940.
Description
Technical field
This application involves a kind of model eye for eyeground detection, being suitable as the detection of model eye with fundus camera is
The fundus imaging of representative checks the performance indicator of class medical instrument.
Background technique
Fundus imaging checks that the medical instrument of class mainly includes fundus camera, eyeground contrast machine, retinal tomography etc..Its
In, fundus camera is Typical Representative, and eyeground is recorded and preserved in the form of black and white or photochrome, for eye
Bottom medical diagnosis on disease.Its major optical performance includes resolution ratio, field angle etc., and the accuracy of these performance indicators, which is directly related to, examines
Disconnected validity, and then it is related to the safety of patient's eye.International standard IS010940 " the ophthalmological instrument of fundus camera product
Fundus camera " it has released, the measurement methods such as resolution ratio, field angle in fundus camera international standard are apart from eye at present
Bottom camera is measured at 1 meter of position using different sighting targets.This method measures in air, does not account for actual persons eye shape
State is a kind of method of theory.
Utility model content
The technical issues of the application solves is in view of the deficiencies of the prior art, to provide a kind of model for eyeground detection
Eye.
The application devises a kind of model eye for eyeground detection.The model eye by three pieces optical lens, a piece of have
The egative film of visual field scale and resolution ratio line pair composition, entire camera lens are followed successively by the first eyeglass, the second eyeglass, the from the object side to the image side
Three eyeglasses, egative film, the mutual adjacent surface of the first eyeglass, the second eyeglass, third eyeglass, egative film are close to, the visual field footmark
Ruler and resolution ratio line are to being arranged in the cambered surface of egative film front.
The relative fefractive index difference of first eyeglass and the second eyeglass is 2.9%, the relative index of refraction of the second eyeglass and third eyeglass
Difference is 2.9%, and relative fefractive index difference, the relative fefractive index difference of the second eyeglass and third eyeglass of the first eyeglass and the second eyeglass are equal
It is knitted between two layers (cornea and aqueous humor, aqueous humor and crystalline lens, crystalline lens and vitreum) of arbitrary neighborhood with practical human eye dioptric system
Relative fefractive index difference deviation be not more than 1%.
Ametropia characteristic is simulated practical human eye dioptric system and is knitted, and equivalent air mid-focal length is 17mm, and focus is bent after third eyeglass
On face.
The disc of confusion radius and Gullstrand classical model eye deviation of paraxial light and the outer light of axis are not more than 15%, outgoing
The angle and Gullstrand classical model eye deviation of chief ray and eyeground tangent line are not more than 1 °.
In the case where incident diaphragm is 3mm, the MTF numerical value and Gullstrand classical model eye deviation of paraxial light are not
Greater than 0.1.
Visual field angle staff lattice value is 0.5 °, and maximum field of view's angle reading is 60 °.
Resolution ratio line is to including following specification: 25lp/mm, 40lp/mm, 60lp/mm, 80lp/mm, 100lp/mm.
The beneficial effect of the application is: the application devises a kind of model eye for eyeground detection, simple for structure, leads to
It is good with property, suitable for substituting the theoretical method international standard ISO10940 for detecting the eyeground using fundus camera as representative
The field angle and resolution ratio of imaging inspection class medical instrument.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present application.
In Fig. 1: the 1-the first eyeglass；2-the second eyeglass；3-third eyeglasses；4-have visual field angle staff and resolution ratio line
Pair egative film.
Fig. 2 is the planar development schematic diagram of the egative film with visual field angle staff and resolution ratio line pair.
Fig. 3 is center visual field resolution ratio line to schematic diagram.
Fig. 4 is non-central visual field resolution ratio line to schematic diagram.
Specific embodiment
The application is described further below in conjunction with attached drawing.Zuo Weiqian in Fig. 1, after the right side is.
It is referring to Fig.1 a kind of model eye for eyeground detection.The model eye by three pieces optical lens, it is a piece of have visual field
The egative film 4 of angle staff and resolution ratio line pair composition.Entire camera lens be followed successively by from the object side to the image side the first eyeglass 1, the second eyeglass 2,
Third eyeglass 3, egative film 4, the mutual adjacent surface of the first eyeglass 1, the second eyeglass 2, third eyeglass 3, egative film 4 is close to, described
Visual field angle staff and resolution ratio line are to setting on egative film 4 and 3 adjacent surface of third eyeglass (cambered surface of 4 front of egative film).
First eyeglass 1 therein is convex lens, and the radius of front surface and rear surface is respectively 8 and -14.027, center thickness
It is 4.5, material is K9 glass；Second eyeglass 2 is concavees lens, the radius of front surface and rear surface be respectively -14.027 and
9.988, center thickness 1.5, material is H-BAK5 glass；Third eyeglass 3 is convex lens, the radius point of front surface and rear surface
Not Wei 9.988 and -11.476, center thickness 19.264, material be K9 glass.
Visual field angle staff lattice value is 0.5 °, and maximum field of view's angle reading is 60 °.
Resolution ratio line includes following specification: 25lp/mm, 40lp/mm, 60lp/mm, 80lp/mm, 100lp/ to (portraying line)
mm。
The application devises a kind of model eye for eyeground detection, the refraction between optical mirror slip therein or lens set
Rate differential mode intends practical human eye dioptric system, the visual field scale delineated on egative film and resolution ratio line to according to the index in ISO10940
It is required that and substituting the method in ISO10940 for detecting using fundus camera as the fundus imaging of representative inspection class Medical treatment device
The field angle and resolution ratio of tool.
Claims (8)
1. for eyeground detection model eye, it is characterised in that: the model eye by three pieces optical lens, it is a piece of have field angle
The egative film of scale and resolution ratio line pair composition, model eye are followed successively by the first eyeglass, the second eyeglass, third mirror from the object side to the image side
Piece, egative film, the mutual adjacent surface of the first eyeglass, the second eyeglass, third eyeglass, egative film are close to, the visual field angle staff and
Resolution ratio line is to being arranged in the cambered surface of egative film front.
2. the model eye according to claim 1 for eyeground detection, it is characterised in that: the first eyeglass and the second eyeglass
Relative fefractive index difference is 2.9%, and the relative fefractive index difference of the second eyeglass and third eyeglass is 2.9%, the first eyeglass and the second eyeglass
Relative fefractive index difference, the second eyeglass and third eyeglass relative fefractive index difference knit arbitrary neighborhood with practical human eye dioptric system
The deviation of relative fefractive index difference between two layers is not more than 1%.
3. the model eye according to claim 1 for eyeground detection, it is characterised in that: ametropia characteristic simulates practical human eye
Dioptric tissue, equivalent air mid-focal length are 17mm, and focus is on third eyeglass rear curved surface.
4. the model eye according to claim 1 for eyeground detection, it is characterised in that: the disperse of paraxial light and the outer light of axis
Spot radius and Gullstrand classical model eye deviation are not more than 15%, are emitted the angle and Gu Er of chief ray and eyeground tangent line
Lennart Strand classical model eye deviation is not more than 1 °.
5. the model eye according to claim 1 for eyeground detection, it is characterised in that: in the feelings that incident diaphragm is 3mm
Under condition, the MTF numerical value and Gullstrand classical model eye deviation of paraxial light are not more than 0.1.
6. the model eye according to claim 1 for eyeground detection, it is characterised in that: visual field angle staff lattice value is
0.5 °, maximum field of view's angle reading is 60 °.
7. the model eye according to claim 1 for eyeground detection, it is characterised in that: resolution ratio line is to including 25lp/
Five kinds of specifications of mm, 40lp/mm, 60lp/mm, 80lp/mm, 100lp/mm.
8. the model eye according to claim 1 for eyeground detection, it is characterised in that: the first eyeglass is convex lens, the
The front surface of one eyeglass and the radius of rear surface are respectively 8 and -14.027, and center thickness 4.5, material is K9 glass；Second
Eyeglass is concavees lens, and the front surface of the second eyeglass and the radius of rear surface are respectively -14.027 and 9.988, and center thickness is
1.5, material is H-BAK5 glass；Third eyeglass is convex lens, and the front surface of third eyeglass and the radius of rear surface are respectively
9.988 and -11.476, center thickness 19.264, material is K9 glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721411973.XU CN208573723U (en) | 2017-10-30 | 2017-10-30 | A kind of model eye for eyeground detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721411973.XU CN208573723U (en) | 2017-10-30 | 2017-10-30 | A kind of model eye for eyeground detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208573723U true CN208573723U (en) | 2019-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721411973.XU Active CN208573723U (en) | 2017-10-30 | 2017-10-30 | A kind of model eye for eyeground detection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107647845A (en) * | 2017-10-30 | 2018-02-02 | 浙江省医疗器械检验院 | A kind of model eye and its application method for eyeground detection |
-
2017
- 2017-10-30 CN CN201721411973.XU patent/CN208573723U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107647845A (en) * | 2017-10-30 | 2018-02-02 | 浙江省医疗器械检验院 | A kind of model eye and its application method for eyeground detection |
| CN107647845B (en) * | 2017-10-30 | 2024-02-23 | 浙江省医疗器械检验院 | Model eye for fundus detection and application method thereof |
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