CN109288494A - A kind of binocular fundus camera - Google Patents
A kind of binocular fundus camera Download PDFInfo
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- CN109288494A CN109288494A CN201811507919.4A CN201811507919A CN109288494A CN 109288494 A CN109288494 A CN 109288494A CN 201811507919 A CN201811507919 A CN 201811507919A CN 109288494 A CN109288494 A CN 109288494A
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- object lens
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- reflective mirror
- ocular lens
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- 230000003287 optical effect Effects 0.000 claims abstract description 36
- 238000003384 imaging method Methods 0.000 claims abstract description 11
- 230000011514 reflex Effects 0.000 claims abstract description 6
- 230000010287 polarization Effects 0.000 claims description 62
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 206010012601 diabetes mellitus Diseases 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 210000000162 simple eye Anatomy 0.000 description 1
Classifications
-
- 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
-
- 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
Abstract
The present invention discloses a kind of binocular fundus camera, including left ocular lens, right ocular lens, lighting system and the camera chain being set in the camera body of the fundus camera, lighting system is set between the light source of fundus camera and left ocular lens and right ocular lens, and lighting system enters eyes through left ocular lens and right ocular lens respectively for the light that light source issues to be divided into two-way；Camera chain includes optical module and photomoduel, and optical module is set between photomoduel and two ocular lens, and the light that tested eye fundus reflex returns is transferred to photomoduel imaging through optical module again through left ocular lens and right ocular lens.Binocular fundus camera in the present invention, can be by once positioning, once-through operation, realizes while the effect for two eyes that shoot same people or so.
Description
Technical field
The present invention relates to ophthalmic optical-instruments technical fields, more particularly to a kind of binocular fundus camera.
Background technique
Fundus camera is important ophthalmic optical-instruments, has become one of the requisite instrumentation of ophthalmology at present.Modern people
Suffer from diabetes etc. be related to eyeground occur lesion related disease it is more, and require early discovery, early treatment.Existing eye-ground photography
Machine simple eye can only be shot, cannot be by once-through operation, while shoot two eyes.
Summary of the invention
The object of the present invention is to provide a kind of binocular fundus cameras, to solve the above-mentioned problems of the prior art, lead to
Primary positioning is crossed, once-through operation can shoot the fundus camera of two eyes of same people or so.
To achieve the above object, the present invention provides following schemes: the present invention provides a kind of binocular fundus camera, including
Left ocular lens, right ocular lens, lighting system and the camera chain being set in the camera body of the fundus camera, the illumination
System is set between the light source of the fundus camera and the left ocular lens and right ocular lens, and the lighting system is used for
The light that light source issues is divided into two-way and enters eyes through the left ocular lens and right ocular lens respectively；The camera chain includes
Optical module and photomoduel, the optical module are set between the photomoduel and two ocular lens, and it is anti-to be detected eye eyeground
The light being emitted back towards is transferred to photomoduel imaging through the optical module again through the left ocular lens and right ocular lens.
Preferably, the optical module includes the first reflective mirror A, the second reflective mirror A, third reflective mirror A, the first polarization point
Light prism, the second polarization splitting prism, the first object lens A, the second object lens A and third object lens A, the photomoduel include left camera
With right camera, the interior lateral edge optical axis direction of the right ocular lens sets gradually the first reflective mirror A, the first polarization spectro rib
It is the right camera on rear side of mirror, the first object lens A, the second polarization splitting prism and third object lens A, the third object lens A；The left side
The interior lateral edge light reflection direction of ocular lens sets gradually the second reflective mirror A, third reflective mirror A, the first polarization spectro rib
It is the left camera on rear side of mirror, the first object lens A, the second polarization splitting prism and the second object lens A, the second object lens A；Two flank
First polarization splitting prism, the first object lens A and the second polarization splitting prism of the inside setting of eyepiece are intersection；Institute
It states the first polarization splitting prism and the second polarization splitting prism is used to carry out polarization spectro to the light of two sides.
Preferably, the optical module include the first polarizing plate, it is the second polarizing plate, the first reflective mirror B, second reflective
Mirror B, the first spectroscope, the second spectroscope, the first object lens B, the second object lens B, third object lens B, the first analyser plate and the second inspection
Polarizing film, the photomoduel include left camera and right camera, and the interior lateral edge light reflection direction of the right ocular lens is successively set
Set first polarizing plate, the first reflective mirror B, the first spectroscope, the first object lens B, the second spectroscope, the second analyser plate and
It is the right camera on rear side of third object lens B, the third object lens B；The interior lateral edge optical axis direction of the left ocular lens is set gradually
Second polarizing plate, two the second reflective mirror B, the first spectroscope, the first object lens B, the second spectroscopes, the first analyser plate
With the second object lens B, the second object lens B rear side is the left camera；First light splitting of the inside setting of two sides ocular lens
Mirror, the first object lens B and the second spectroscope are intersection；First spectroscope and the second spectroscope are used for two sides polarizing
The polarization light of piece is transmitted；The polarization direction of first polarizing plate and second polarizing plate is orthogonal, institute
It is consistent with the polarization direction of second analyser plate to state the first polarizing plate, second polarizing plate and first analyzing
The polarization direction of vibration piece is consistent.
Preferably, the optical module include the first reflective mirror C, the second reflective mirror C, rotating mirror, the first object lens C and
Second object lens C, the photomoduel are camera, and it is anti-that described first is respectively set on the inside of the right ocular lens and left ocular lens
Light microscopic C and the second reflective mirror C, is provided with the rotating mirror between the first reflective mirror C and the second reflective mirror C, described
The light end that goes out of rotating mirror sets gradually the first object lens C and the second object lens C, and the rear side of the second object lens C is described
Camera.
The present invention achieves following technical effect compared with the existing technology:
Compared with existing fundus camera, there are two ocular lens for the binocular fundus camera tool in the present invention, wherein one
A to be used to shoot left eye, another is for shooting right eye.The binocular fundus camera shares for two eyes shot
One lighting system and a camera chain.The light that this fundus camera light source issues after lighting system, and does not reach
Before ocular lens, it is divided into two-way light beam, all the way through left ocular lens, another way is illuminated through right ocular lens subsequently into eyes respectively
The eyeground of right and left eyes；The eyeground of right and left eyes to be illuminated, the light being reflected back, respectively after the ocular lens of left and right, through same path
Into camera chain；Realize the function that can simultaneously eyes be carried out with eye-ground photography on a fundus camera.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is that the light of embodiment one transmits schematic diagram；
Fig. 2 is that the light of embodiment two transmits schematic diagram；
Fig. 3 is that the light of embodiment three transmits schematic diagram；
Fig. 4 is that the light of polarization splitting prism is divided path profile；
Wherein, 1 right ocular lens；2 left ocular lens；3 first reflective mirror A；4 second reflective mirror A；5 third reflective mirror A；6 first
Polarization splitting prism；7 first object lens A；8 second polarization splitting prisms；9 third object lens A；10 second object lens A；11 left cameras；12
Right camera；13 first polarizing plates；14 second polarizing plates；15 first reflective mirror B；16 second reflective mirror B；17 first light splitting
Mirror；18 first object lens B；19 second spectroscopes；20 first analyser plates；21 second analyser plates；22 second object lens B；23 thirds
Object lens B；24 first reflective mirror C；25 second reflective mirror C；26 rotating mirrors；27 first object lens C；28 second object lens C；29 photograph
Machine.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of binocular fundus cameras, to solve the above-mentioned problems of the prior art, lead to
Primary positioning is crossed, once-through operation can shoot the fundus camera of two eyes of same people or so.
Based on this, binocular fundus camera provided by the invention, including being set in the camera body of the fundus camera
Left ocular lens, right ocular lens, lighting system and camera chain, lighting system is set to the light source of fundus camera and a left side connects mesh
Between mirror and right ocular lens, and lighting system connects mesh through left ocular lens and the right side respectively for the light that light source issues to be divided into two-way
Mirror enters eyes；Camera chain includes optical module and photomoduel, optical module be set to photomoduel and two ocular lens it
Between, the light that tested eye fundus reflex returns is transferred to photomoduel imaging through optical module again through left ocular lens and right ocular lens.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Please refer to Fig. 1-4, wherein Fig. 1 is that the light of embodiment one transmits schematic diagram；Fig. 2 is that the light of embodiment two passes
Pass schematic diagram；Fig. 3 is that the light of embodiment three transmits schematic diagram；Fig. 4 is that the light of polarization splitting prism is divided path profile.
General fundus camera is all mainly to be made of lighting system and camera chain two parts.The mirror of instrument foremost
Head, that is, it is directed at the camera lens of eye shot, referred to as ocular lens.
Different from existing fundus camera, the binocular fundus camera in the present invention has there are two ocular lens, one of them
For shooting left eye, another, can also two photoelectric devices (CCD, CMOS) or general of corresponding setting for shooting right eye
Logical single-lens reflex camera machine fuselage.
The binocular fundus camera shares a lighting system and a photography system for two eyes shot
System.The light that this fundus camera light source issues is divided into two-way light beam after lighting system, and before not reaching ocular lens,
All the way through left ocular lens, another way is through right ocular lens, subsequently into eyes, illuminates the eyeground of right and left eyes respectively.A left side to be illuminated
The eyeground of right eye, the light being reflected back enter camera chain through same path respectively after the ocular lens of left and right.
About the above-mentioned scheme for separating light beam and merging optical path, the present invention uses two ways, and one kind is space separation side
Formula, another kind are time-division mode.
Space separates mode: after ocular lens, linear polarization element is arranged, right and left eyes imaging beam is made to become orthogonal
Linearly polarized light.Before the photoelectric element of corresponding left and right two be arranged line polarisation element, polarization direction with it is corresponding at
As beam direction is identical.
In this way, the imaging beam that left eye eyeground issues, can only reach photoelectronic imaging element (image planes) corresponding with left eye, together
The imaging beam that sample right eye eyeground issues arrives right photoelectronic imaging element.It realizes right and left eyes once to position, once-through operation.
Time-division mode: separate the imaging beam of right and left eyes, the plane by the way of quick swinging plane reflective mirror
Reflective mirror is two sides plating total reflection film.After ocular lens quick swinging plane reflective mirror is arranged, at the first time by left eye in the present invention
Optical path is got through, and the second time got through right eye optical path.It and is at the first time quick, moment the interval between the second time
, must not generally it be longer than 1/10 second.
Certainly, the method that binocular once positions, once-through operation shoots two eyes in left and right is realized, it can also be by two eyeground
Camera merges on a bottom plate or bracket.
In operation, the mode (finding a view) for being directed at human eye can use existing Eye Recognition to the present invention.
Embodiment one
As shown in Figure 1, the present embodiment provides a kind of binocular fundus cameras, the camera including being set to the fundus camera
Intrinsic left ocular lens 2, right ocular lens 1, lighting system and camera chain, lighting system are set to the light source of fundus camera
Between left ocular lens 2 and right ocular lens 1, and lighting system connects mesh through a left side respectively for the light that light source issues to be divided into two-way
Mirror 2 and right ocular lens 1 enter eyes；Camera chain includes optical module and photomoduel, and optical module is set to photomoduel
And two between ocular lens, the light that tested eye fundus reflex returns is transferred to through optical module again through left ocular lens 2 and right ocular lens 1
Photomoduel imaging.
Optical module include the first reflective mirror A3, the second reflective mirror A4, third reflective mirror A5, the first polarization splitting prism 6,
Second polarization splitting prism 8, the first object lens A7, the second object lens A10 and third object lens A9, photomoduel include left camera 11 and the right side
Camera 12, the interior lateral edge optical axis direction of right ocular lens 1 set gradually the first reflective mirror A3, the first polarization splitting prism 6, the first object
Mirror A7, the second polarization splitting prism 8 and third object lens A9, third object lens A9 rear side is right camera 12；The interior lateral edge of left ocular lens 2
Light reflection direction sets gradually the second reflective mirror A4, third reflective mirror A5, the first polarization splitting prism 6, the first object lens A7,
It is left camera 11 on rear side of two polarization splitting prisms 8 and the second object lens A10, the second object lens A10；The inside setting of two sides ocular lens
First polarization splitting prism 6, the first object lens A7 and the second polarization splitting prism 8 are intersection；First polarization splitting prism, 6 He
Second polarization splitting prism 8 is used to carry out polarization spectro to the light of two sides.
In use, the light reflected from right eye, through right ocular lens 1, the first reflective mirror A3 is arrived after eyeground is illuminated
Up to the first polarization splitting prism 6 (incident non-polarized light can be divided into the mutually perpendicular linearly polarized light of two beams by polarization splitting prism,
Such as Fig. 4), it is reflected through the first polarization splitting prism 6, at S polarized light, then reaches the second polarization splitting prism through the first object lens A7
8, it is reflected by the second polarization splitting prism 8 and reaches third object lens A9, then form right eye fundus image in the image planes of right camera.
As a same reason, the light that left eye reflects is arrived through left ocular lens 2, the second reflective mirror A4 and third reflective mirror A5
It up to the first polarization spectroscope 6, is transmitted through the first polarization spectroscope 6, at P-polarized light, then reaches second partially through the first object lens A7
Shake Amici prism 8, is transmitted by the second polarization splitting prism 8 and reaches the second object lens A10, then forms left eye in the image planes of left camera
Fundus image.
Embodiment two
As shown in Fig. 2, the present embodiment provides a kind of binocular fundus cameras, and on the basis of example 1, the present embodiment
Binocular fundus camera used by difference in optical module and embodiment one, specifically:
Optical module includes the first polarizing plate 13, the second polarizing plate 14, the first reflective mirror B15, the second reflective mirror
B16, the first spectroscope 17, the second spectroscope 19, the first object lens B18, the second object lens B22, third object lens B23, the first analyzing vibration
Piece 20 and the second analyser plate 21, photomoduel include left camera 11 and right camera 12, the interior lateral edge light reflection of right ocular lens 1
Direction sets gradually the first polarizing plate 13, the first reflective mirror B15, the first spectroscope 17, the first object lens B18, the second spectroscope
19, the second analyser plate 21 and third object lens B23, third object lens B23 rear side is right camera 12；The interior lateral edge light of left ocular lens 2
Line reflection direction set gradually 14, two the second reflective mirror B16 of the second polarizing plate, the first spectroscope 17, the first object lens B18,
It is left camera 11 on rear side of second spectroscope 19, the first analyser plate 20 and the second object lens B22, the second object lens B22；Two sides ocular lens
Inside setting the first spectroscope 17, the first object lens B18 and the second spectroscope 19 be intersection；First spectroscope 17 and
Two spectroscopes 19 are for transmiting the polarization light of two sides polarizing plate；First polarizing plate 13 and the second polarizing plate 14
Polarization direction it is orthogonal, the first polarizing plate 13 is consistent with the polarization direction of the second analyser plate 21, the second polarizing plate
14 is consistent with the polarization direction of the first analyser plate 20.
In use, after eyeground is illuminated, the light reflected from right eye, through right ocular lens 1, the first polarizing plate 13,
As linearly polarized light, then through the first reflective mirror B15, the first spectroscope 17 reflection, to the first object lens B18, then through the second spectroscope
19 reflections, pass through polarization direction and consistent second analyser plate 21 of above-mentioned the first polarised light 13, third object lens B23, on the right side
Camera 12 is imaged.
In the present embodiment, the polarization direction of the first polarizing plate 13 and the second polarizing plate 14 is mutually perpendicular.
Similarly, the light reflected from left eye, through left ocular lens 2, the second polarizing plate 14, two the second reflective mirrors
B16, the transmission of the first spectroscope 17 transmit to the first object lens B18, then the second spectroscope 19, pass through polarization direction and above-mentioned second
Consistent first analyser plate 20 of polarizing light 14, the second object lens B22 are imaged in left camera 11.
Embodiment three
As shown in figure 3, the present embodiment provides a kind of binocular fundus cameras, and on the basis of example 1, the present embodiment
Binocular fundus camera used by difference in optical module and embodiment one, specifically:
Optical module includes the first reflective mirror C24, the second reflective mirror C25, rotating mirror 26, the first object lens C27 and the
Two object lens C28, photomoduel are camera 29, and the first reflective mirror C24 is respectively set in the inside of right ocular lens 1 and left ocular lens 2
With the second reflective mirror C25, rotating mirror 26, rotating mirror are provided between the first reflective mirror C24 and the second reflective mirror C25
The 26 light end that goes out sets gradually the rear side of the first object lens C27 and the second object lens C28, the second object lens C28 as camera 29.
In use, after eyeground is illuminated, the light come out from right eye fundus reflex, through right ocular lens 1, the first reflective mirror
C24 reaches rotating mirror 26, this moment rotating mirror 26 be in 45 ° of angles of optical axis, and it is parallel with the first reflective mirror C24
State is imaged then through the first object lens C27, the second object lens C28 in camera 29.Then, rotating mirror 26 is clockwise immediately
Direction turns over 90 °, the light at this moment reflected from left eye, and through left ocular lens 2, the second reflective mirror C25 reaches rotating mirror
26, this moment rotating mirror 26 be in 45 ° of angles of optical axis, and with the second reflective mirror C25 parastate, then through the first object lens
In addition C27, the second object lens C28 are independently imaged again in camera 29.
Specific examples are applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to
According to thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (4)
1. a kind of binocular fundus camera, it is characterised in that: the left side including being set in the camera body of the fundus camera connects
Eyepiece, right ocular lens, lighting system and camera chain, the lighting system be set to the light source of the fundus camera with it is described
Between left ocular lens and right ocular lens, and the lighting system is used to the light that light source issues being divided into two-way respectively through the left side
Ocular lens and right ocular lens enter eyes；The camera chain includes optical module and photomoduel, the optical module setting
Between the photomoduel and two ocular lens, it is detected light that eye fundus reflex returns through the left ocular lens and right ocular lens again
Photomoduel imaging is transferred to through the optical module.
2. binocular fundus camera according to claim 1, it is characterised in that: the optical module includes the first reflective mirror
A, the second reflective mirror A, third reflective mirror A, the first polarization splitting prism, the second polarization splitting prism, the first object lens A, the second object
Mirror A and third object lens A, the photomoduel include left camera and right camera, the interior lateral edge optical axis directions of the right ocular lens according to
It is secondary that the first reflective mirror A, the first polarization splitting prism, the first object lens A, the second polarization splitting prism and third object lens A are set,
It is the right camera on rear side of the third object lens A；The interior lateral edge light reflection direction of the left ocular lens sets gradually described
Two reflective mirror A, third reflective mirror A, the first polarization splitting prism, the first object lens A, the second polarization splitting prism and the second object lens A,
It is the left camera on rear side of the second object lens A；First polarization splitting prism of the inside setting of two sides ocular lens, first
Object lens A and the second polarization splitting prism are intersection；First polarization splitting prism and the second polarization splitting prism are used for
Polarization spectro is carried out to the light of two sides.
3. binocular fundus camera according to claim 1, it is characterised in that: the optical module includes the first polarizing
Piece, the second polarizing plate, the first reflective mirror B, the second reflective mirror B, the first spectroscope, the second spectroscope, the first object lens B, second
Object lens B, third object lens B, the first analyser plate and the second analyser plate, the photomoduel include left camera and right camera, institute
The interior lateral edge light reflection direction for stating right ocular lens sets gradually first polarizing plate, the first reflective mirror B, the first light splitting
It is the right phase on rear side of mirror, the first object lens B, the second spectroscope, the second analyser plate and third object lens B, the third object lens B
Machine；The interior lateral edge optical axis direction of the left ocular lens sets gradually second polarizing plate, two the second reflective mirror B, first
It is the left side on rear side of spectroscope, the first object lens B, the second spectroscope, the first analyser plate and the second object lens B, the second object lens B
Camera；First spectroscope, the first object lens B and the second spectroscope of the inside setting of two sides ocular lens are intersection；Institute
The first spectroscope and the second spectroscope are stated for transmiting to the polarization light of two sides polarizing plate；First polarizing plate
It is orthogonal with the polarization direction of second polarizing plate, the polarization of first polarizing plate and second analyser plate
Direction is consistent, and second polarizing plate is consistent with the polarization direction of first analyser plate.
4. binocular fundus camera according to claim 1, it is characterised in that: the optical module includes the first reflective mirror
C, the second reflective mirror C, rotating mirror, the first object lens C and the second object lens C, the photomoduel are camera, and the right side connects mesh
The first reflective mirror C and the second reflective mirror C, the first reflective mirror C and second are respectively set on the inside of mirror and left ocular lens
Be provided with the rotating mirror between reflective mirror C, the rotating mirror go out light end set gradually the first object lens C and
The rear side of second object lens C, the second object lens C is the camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811507919.4A CN109288494B (en) | 2018-12-11 | 2018-12-11 | Binocular fundus camera |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811507919.4A CN109288494B (en) | 2018-12-11 | 2018-12-11 | Binocular fundus camera |
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| CN109288494A true CN109288494A (en) | 2019-02-01 |
| CN109288494B CN109288494B (en) | 2023-12-01 |
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| CN201811507919.4A Active CN109288494B (en) | 2018-12-11 | 2018-12-11 | Binocular fundus camera |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111443411A (en) * | 2020-04-21 | 2020-07-24 | 南昌嘉研科技有限公司 | Two-way spectroscope |
| CN112472022A (en) * | 2020-12-10 | 2021-03-12 | 上海雄博精密仪器股份有限公司 | Optical structure of hand-held fundus camera |
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| CN105101868A (en) * | 2013-03-28 | 2015-11-25 | 耐克斯赛特公司 | Apparatus for ocular fundus inspection |
| CN106551675A (en) * | 2015-09-30 | 2017-04-05 | 苏州速迈医疗设备有限公司 | A kind of binocular indirect ophthalmoscope with polarization function |
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| JPH0788081A (en) * | 1993-09-21 | 1995-04-04 | Canon Inc | Device for optometry |
| US5543866A (en) * | 1994-01-07 | 1996-08-06 | Jozef F. Van de Velde | Scanning laser ophthalmoscope for binocular imaging and functional testing |
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| CN112472022A (en) * | 2020-12-10 | 2021-03-12 | 上海雄博精密仪器股份有限公司 | Optical structure of hand-held fundus camera |
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| Publication number | Publication date |
|---|---|
| CN109288494B (en) | 2023-12-01 |
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