CN106175661A - Fundus camera and optical system thereof - Google Patents
Fundus camera and optical system thereof Download PDFInfo
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- CN106175661A CN106175661A CN201610545834.XA CN201610545834A CN106175661A CN 106175661 A CN106175661 A CN 106175661A CN 201610545834 A CN201610545834 A CN 201610545834A CN 106175661 A CN106175661 A CN 106175661A
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- lens
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- sighting target
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/14—Arrangements specially adapted for eye photography
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Ophthalmology & Optometry (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Eye Examination Apparatus (AREA)
Abstract
The present invention provides a kind of fundus camera and optical system thereof.Optical system includes that set gradually meets mesh object lens L1, image-forming objective lens L2And for gathering the imageing sensor of eye fundus image, described optical system also includes for the sighting target for eye-observation；Described sighting target meets mesh object lens L described in being arranged on1With image-forming objective lens L2Between；Or, described optical system also include being arranged on described in meet mesh object lens L1With described image-forming objective lens L2Between the semi-transparent semi-reflecting lens for light splitting, described image-forming objective lens L2, imageing sensor is successively set in the transmitted light path of described semi-transparent semi-reflecting lens and described imageing sensor is positioned at position mutually conjugate with optical fundus, described sighting target is arranged in the reflected light path of described semi-transparent semi-reflecting lens and is positioned at position mutually conjugate with optical fundus, and described sighting target is consistent with the conjugate distance of described imageing sensor.During shooting optical fundus, human eye watches sighting target naturally attentively, it is not necessary to fixing eyeball, easy to operate.
Description
Technical field
The present invention relates to medical instruments field, be specifically designed a kind of fundus camera and optical system thereof.
Background technology
Eye ground blood vessel network be human body uniquely can directly observe small artery, venule blood vessel network, it
Can directly reflect the diseases such as coronary heart disease, hypertension, diabetes.Wherein the modal chronic complicating diseases of diabetics is sugar
Urine characteristic of disease retinopathy (Diabetic Retinopathy, DR), blind rate is 25 times of general population.By checking optical fundus
Whether produce vascular lesions, be the Main Basis of these diseases of early diagnosis, it is achieved early check, morning diagnoses, early prevention, is regarding
Patient is effectively treated before producing by the irreversible damage of nethike embrane, thus optical fundus examination has very important clinical meaning.Just
Often retina and the amphiblestroid contrast of pathological changes are referring to the drawings shown in 1A, 1B, and wherein accompanying drawing 1A is normal retina image, accompanying drawing 1B
For diabetic retinopathy image.
At present, typically obtain optical fundus picture by fundus camera the retina etc. on optical fundus is observed and analyzed.Often
Rule fundus camera has goggle structure, need to be observed by eyepiece and focus optical fundus to find pathological area, then pass through photographic system
Gather optical fundus picture.When gathering eye fundus image, should prevent Rotation of eyeball, prior art generally uses fixing eyeball angles as far as possible
Mode prevent Rotation of eyeball, and fundus camera based on this mode is mostly desk-top product, and operation specialty, to operator
Requirement higher.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of fundus camera and optical system thereof, it is easy to operate.
A kind of technical scheme that the present invention uses is:
The optical system of a kind of fundus camera, meets mesh object lens L including set gradually1, image-forming objective lens L2And be used for gathering eye
The imageing sensor of base map picture, it is characterised in that: described optical system also includes for the sighting target for eye-observation, described sighting target
Mesh object lens L is met described in being arranged on1With image-forming objective lens L2Between.
Preferably, this optical system includes that setting meets mesh object lens L described in being arranged on1And between described sighting target can be along optical axis
The focusing lens L of movement1’。
The another kind of technical scheme that the present invention uses is:
The optical system of a kind of fundus camera, meets mesh object lens L including set gradually1, image-forming objective lens L2And be used for gathering eye
The imageing sensor of base map picture, described optical system also include being arranged on described in meet mesh object lens L1With described image-forming objective lens L2Between
The semi-transparent semi-reflecting lens for light splitting, for for the sighting target of eye-observation, described image-forming objective lens L2, imageing sensor sets gradually
In the transmitted light path of described semi-transparent semi-reflecting lens and described imageing sensor is positioned at position mutually conjugate with optical fundus, described sighting target
It is arranged in the reflected light path of described semi-transparent semi-reflecting lens and is positioned at position mutually conjugate with optical fundus, described sighting target and described image
The conjugate distance of sensor is consistent.
Preferably, described optical system also includes image-forming objective lens L2', described image-forming objective lens L2', sighting target be successively set on institute
State in the reflected light path of semi-transparent semi-reflecting lens.
It is highly preferred that described optical system includes reflecting mirror, described reflecting mirror, image-forming objective lens L2', sighting target is successively set on
In the reflected light path of described semi-transparent semi-reflecting lens.
It is highly preferred that described image-forming objective lens L2With described image-forming objective lens L2' optical parametric consistent.
Preferably, described optical system also includes the focusing lens L that can move along optical axis1', described focusing lens L1' it is arranged on institute
State and connect between mesh object lens and described semi-transparent semi-reflecting lens.
Another technical scheme that the present invention uses is:
A kind of fundus camera with described optical system.
Preferably, described imageing sensor is connected with display screen, for being shown on a display screen by the eye fundus image collected
Show；
And/or, described imageing sensor and a data sending device are connected, and send to service for the eye fundus image that will collect
On device end or terminal.
Preferably, described focusing lens L1' be arranged in lens barrel, described lens barrel is provided with corresponding to facing, myopia and
The scale of hypermetropia.
The present invention uses technique scheme, has the advantage that compared to existing technology and arranges sighting target in the optical path, human eye
When observing sighting target, eyeball keeps the most motionless naturally, it is not necessary to fixing eyeball；According to light path principle of reversibility, human eye can see sighting target clearly
Time, eye fundus image be able to imaging on the image sensor so that easy to operate, fundus camera simple in construction, can be portable.
Accompanying drawing explanation
Accompanying drawing 1A is normal retinal images；
Accompanying drawing 1B is the retinal images of diabetic pathological changes；
Accompanying drawing 2 is the optical system of the embodiment of the present invention 1；
Accompanying drawing 3 is the lens barrel scale schematic diagram of the fundus camera of the present invention；
Accompanying drawing 4 is the optical system of the embodiment of the present invention 2.
Wherein, 1, optical fundus；2, eye pupil；L1, connect mesh object lens；L1', focusing lens；3, semi-transparent semi-reflecting lens；L2, image-forming objective lens；4、
Imageing sensor；5, reflecting mirror；L2', image-forming objective lens；6, sighting target.
Detailed description of the invention
Below in conjunction with the accompanying drawings presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention energy
It is easier to be understood by the person skilled in the art.
Embodiment 1
Accompanying drawing 2 shows a kind of specific embodiment of the optical system of the fundus camera of the present invention.Referring to the drawings shown in 2, this light
System includes meeting mesh object lens L1, image-forming objective lens L2And imageing sensor 4, optical fundus 1 is via meeting mesh object lens L1One is produced real at R
As (intermediary image), this real image is via image-forming objective lens L2Being imaged on imageing sensor 4, imageing sensor 4 realizes eye fundus image
Gather.The light path of this optical system is additionally provided with the sighting target 6 for eye-observation.Specific in the present embodiment, the position of sighting target 6
At the R connect between mesh object lens and image-forming objective lens.Sighting target 6 should be not large enough to block optical fundus 1 completely, so that imageing sensor
4 can collect optical fundus 1 image, and sighting target 6 can be the figures such as cross.
In practice, owing to the diopter of human eye exists individual variation, and difference is the biggest.Emmetropia is directional light
(being equivalent to thing in infinity)；Myopia is converged light (being equivalent to thing limited remote)；Hypermetropia is that diverging light (is equivalent to void
Thing).Optical fundus 1 is to distance l of pupil0Different because human eye diopter is different, therefore to what compensation was the most just being caused by diopter
Object plane moves, and fundus camera can use machinery or optical compensation mode to realize optical fundus 1 blur-free imaging of abnormal eyes and normal eyes.
In order to be suitable for different dioptric person under inspection (such as ametropia situations such as myopia, hypermetropias), the optical system of the present embodiment is connecing
Between mesh object lens L1 and sighting target 6, focusing lens L is set1', focusing lens L1' can move along optical axis, there is bigger range of accommodation.
Imageing sensor 4 is connected with display screen (not shown) and can enter collecting optical fundus 1 image transmission to display screen
Row display, for Real Time Observation and shooting；Imageing sensor 4 also can be connected with data sending device (such as wifi dispensing device), logical
Cross data sending device the server end of the optical fundus 1 image transmission collected to Telemedicine System is stored and analyzed,
Or send and store to the terminals such as the PC of person under inspection, smart mobile phone and show.
Fundus camera includes above-mentioned optical system, wherein focusing lens L1' be arranged in lens barrel.Fast for the ease of person under inspection
Velocity modulation Jiao finds optimal focal plane, referring to the drawings shown in 3, lens barrel is provided with corresponding to facing, myopia and hypermetropia along light between centers
Scale every arrangement.By focusing lens L1' move at myopia scale, the diopter of myopia person under inspection can be compensated；To adjust
Burnt mirror L1' move at hypermetropia scale, the diopter of hypermetropia person under inspection can be compensated.
Focusing lens L1If ' it is the battery of lens being made up of dry lens, the adoptable lighting system of fundus camera does not limits.
The principle of the optical system of the present embodiment is as follows: be arranged at the R of light path by sighting target 6, and person under inspection bends according to self
Luminosity regulation focusing lens L1' until seeing sighting target 6 clearly, according to light path principle of reversibility, optical fundus 1 is inevitable produces a real image at R, and this is real
As via image-forming objective lens L2It is imaged on imageing sensor 4；Connecing, between mesh object lens L1 and sighting target 6, focusing lens L is set1', pass through
Regulation focusing lens L1' position make different dioptric person under inspection can see sighting target 6(clearly i.e., according to distance l on optical fundus 1 to eye pupil 20
Regulation l1And l2), it is ensured that image-forming objective lens L2Conjugate distance l3And l4Remain unchanged, thus the structure of fundus camera can be made the simplest
Change, make fundus camera civil nature, portability, universalness, make general public also optical fundus 1 be checked in time and be possibly realized, and
Obtain correct diagnosis by Telemedicine System, play early prevention, the good effect of early treatment.
Embodiment 2
Accompanying drawing 4 shows the another kind of specific embodiment of the optical system of fundus camera of the present invention, the present embodiment and embodiment 1
Difference is arranged on diverse location at sighting target 6.Referring to the drawings shown in 4, this optical system includes meeting mesh object lens L1, semi-transparent semi-reflecting lens 3,
Image-forming objective lens L2, imageing sensor 4 and reflecting mirror 5, image-forming objective lens L2' and sighting target 6.Semi-transparent semi-reflecting lens 3 is arranged on and connects mesh object lens
L1With image-forming objective lens L2And L2Light splitting, image-forming objective lens L is carried out between '2, imageing sensor 4 be successively set on semi-transparent semi-reflecting lens 3
In transmitted light path and imageing sensor 4 is positioned at position mutually conjugate with optical fundus 1, reflecting mirror 5, image-forming objective lens L2', sighting target 6 depends on
In the secondary reflected light path being arranged on semi-transparent semi-reflecting lens 3 and sighting target 6 is positioned at position mutually conjugate with optical fundus 1.
Human eye is by the reflective observing of semi-transparent semi-reflecting lens 3 to sighting target 6, and imageing sensor 4 is through semi-transparent semi-reflecting lens 3, imaging
Object lens L2Gather eye fundus image.Image-forming objective lens L2With image-forming objective lens L2' optical parametric completely the same, such as focal length etc..Image sensing
On two all mutually conjugate with optical fundus 1 positions that device 4, sighting target 6 are respectively in light path, optical fundus 1 is conjugated with imageing sensor 4
(the two becomes object-image relation), optical fundus 1 is conjugated (the two becomes object-image relation) with sighting target 6, and both imageing sensor 4 and sighting target 6
Conjugate distance is consistent, and i.e. imageing sensor 4 is to optical fundus 1 distance in the optical path and sighting target 6 to optical fundus 1 distance one in the optical path
Cause.When human eye sees sighting target 6 clearly, optical fundus 1 be able to be imaged on imageing sensor 4.
Focusing lens L in the present embodiment1' be arranged on and meet mesh object lens L1And between semi-transparent semi-reflecting lens 3, focusing lens L1' can be along light
Axle moves, and has bigger range of accommodation.
Above-described embodiment for technology design and the feature of the present invention are described, is only a kind of preferred embodiment, and its purpose exists
In allowing person skilled in the art will appreciate that present disclosure and to implement according to this, the guarantor of the present invention can not be limited with this
Protect scope.All equivalence changes made according to the spirit of the present invention or modification, all should contain in protection scope of the present invention
Within.
Claims (10)
1. an optical system for fundus camera, meets mesh object lens L including set gradually1, image-forming objective lens L2And be used for gathering eye
The imageing sensor of base map picture, it is characterised in that: described optical system also includes for the sighting target for eye-observation, described sighting target
Mesh object lens L is met described in being arranged on1With image-forming objective lens L2Between.
Optical system the most according to claim 1, it is characterised in that: this optical system include being arranged on described in connect mesh object lens
L1And the focusing lens L that can move along optical axis between described sighting target1’。
3. an optical system for fundus camera, meets mesh object lens L including set gradually1, image-forming objective lens L2And be used for gathering eye
The imageing sensor of base map picture, it is characterised in that: described optical system also include being arranged on described in meet mesh object lens L1With described become
As object lens L2Between the semi-transparent semi-reflecting lens for light splitting, for for the sighting target of eye-observation, described image-forming objective lens L2, image pass
Sensor is successively set in the transmitted light path of described semi-transparent semi-reflecting lens and described imageing sensor is positioned at mutually conjugate with optical fundus
Position, described sighting target is arranged in the reflected light path of described semi-transparent semi-reflecting lens and is positioned at position mutually conjugate with optical fundus, described
Sighting target is consistent with the conjugate distance of described imageing sensor.
Optical system the most according to claim 3, it is characterised in that: described optical system also includes image-forming objective lens L2', institute
State image-forming objective lens L2', sighting target is successively set in the reflected light path of described semi-transparent semi-reflecting lens.
Optical system the most according to claim 4, it is characterised in that: described optical system includes reflecting mirror, described reflection
Mirror, image-forming objective lens L2', sighting target is successively set in the reflected light path of described semi-transparent semi-reflecting lens.
Optical system the most according to claim 4, it is characterised in that: described image-forming objective lens L2With described image-forming objective lens L2'
Optical parametric is consistent.
Optical system the most according to claim 3, it is characterised in that: described optical system also includes can moving along optical axis
Focusing lens L1', described focusing lens L1' be arranged on described in connect between mesh object lens and described semi-transparent semi-reflecting lens.
8. the fundus camera of the optical system having as described in any one of claim 1-7.
Fundus camera the most according to claim 8, it is characterised in that: described imageing sensor is connected with display screen, is used for
The eye fundus image collected is shown on a display screen；
And/or, described imageing sensor and a data sending device are connected, and send to service for the eye fundus image that will collect
On device end or terminal.
10. there is a fundus camera for optical system as described in claim 2 or 7, described focusing lens L1' it is arranged on lens barrel
In, described lens barrel is provided with corresponding to facing, myopia and the scale of hypermetropia.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610545834.XA CN106175661A (en) | 2016-07-12 | 2016-07-12 | Fundus camera and optical system thereof |
| PCT/CN2016/099646 WO2018010298A1 (en) | 2016-07-12 | 2016-09-21 | Fundus camera and optical system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610545834.XA CN106175661A (en) | 2016-07-12 | 2016-07-12 | Fundus camera and optical system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106175661A true CN106175661A (en) | 2016-12-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610545834.XA Pending CN106175661A (en) | 2016-07-12 | 2016-07-12 | Fundus camera and optical system thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106175661A (en) |
| WO (1) | WO2018010298A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018119583A1 (en) * | 2016-12-26 | 2018-07-05 | 深圳市柔宇科技有限公司 | Optical system and method for adjusting diopter |
| CN108309228A (en) * | 2017-01-16 | 2018-07-24 | 天津工业大学 | portable fundus camera optical system |
| CN109893086A (en) * | 2019-04-11 | 2019-06-18 | 北京悦琦创通科技有限公司 | A kind of fundus camera that lighting source is coaxial with fixation light source |
| CN113974552A (en) * | 2021-12-24 | 2022-01-28 | 深圳纳德光学有限公司 | Fundus feedback type optical system and equipment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109431457A (en) * | 2018-12-21 | 2019-03-08 | 合肥奥比斯科技有限公司 | Multispectral eyeground imaging system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018119583A1 (en) * | 2016-12-26 | 2018-07-05 | 深圳市柔宇科技有限公司 | Optical system and method for adjusting diopter |
| CN108309228A (en) * | 2017-01-16 | 2018-07-24 | 天津工业大学 | portable fundus camera optical system |
| CN109893086A (en) * | 2019-04-11 | 2019-06-18 | 北京悦琦创通科技有限公司 | A kind of fundus camera that lighting source is coaxial with fixation light source |
| CN113974552A (en) * | 2021-12-24 | 2022-01-28 | 深圳纳德光学有限公司 | Fundus feedback type optical system and equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018010298A1 (en) | 2018-01-18 |
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