CN108514402B - Self-timer fundus camera - Google Patents
Self-timer fundus camera Download PDFInfo
- Publication number
- CN108514402B CN108514402B CN201810207586.7A CN201810207586A CN108514402B CN 108514402 B CN108514402 B CN 108514402B CN 201810207586 A CN201810207586 A CN 201810207586A CN 108514402 B CN108514402 B CN 108514402B
- Authority
- CN
- China
- Prior art keywords
- correction
- fundus
- light
- sighting target
- pupil position
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 210000001747 pupil Anatomy 0.000 claims abstract description 37
- 238000005286 illumination Methods 0.000 claims abstract description 14
- 238000003384 imaging method Methods 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims description 14
- 230000000007 visual effect Effects 0.000 claims description 7
- 239000007787 solid Substances 0.000 abstract description 2
- 210000001525 retina Anatomy 0.000 description 4
- 206010012689 Diabetic retinopathy Diseases 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000013399 early diagnosis Methods 0.000 description 2
- 230000002792 vascular Effects 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 206010020772 Hypertension Diseases 0.000 description 1
- 206010057430 Retinal injury Diseases 0.000 description 1
- 210000002565 arteriole Anatomy 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 208000029078 coronary artery disease Diseases 0.000 description 1
- 206010012601 diabetes mellitus Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 231100000216 vascular lesion Toxicity 0.000 description 1
- 210000000264 venule 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
Landscapes
- 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 invention discloses a self-photographing fundus camera, which is shot after a user subjectively judges that the fundus camera is aligned to a needed fundus area. The eye lens comprises an eye lens group, a hollow reflecting mirror, an imaging lens group and an image acquisition device which are sequentially arranged, and further comprises an illumination system and a correction system for judging whether the eye lens group is right against the fundus, wherein the correction system comprises a second light source, a diaphragm and a sighting target plate which are sequentially arranged, a central refraction correction sighting target and a plurality of eye pupil position correction sighting targets which are arranged around the central sighting target are arranged on the sighting target plate, and a second light beam emitted by the second light source is incident to the fundus through the sighting target plate so that the eye can observe the central refraction correction sighting target and/or an image of the eye pupil position correction sighting target. The distance (focusing) from the eyepiece group to the imaging lens group is adjusted so that the bottom eye image is photographed when the central refractive correction optotype seen by the human eye reaches the minimum solid circle and when a given number of pupil position correction optotypes are seen by the user's own moving eye positions.
Description
Technical Field
The invention belongs to ophthalmic equipment, and particularly relates to a self-timer fundus camera.
Background
The fundus retina vascular network is the only arteriole and venule vascular network which can be directly observed by human body, and can directly reflect diseases such as coronary heart disease, hypertension, diabetes and the like. The most common chronic complication in diabetics is diabetic retinopathy (Diabetic Retinopathy, DR), with a blindness rate of 25 times that of the general population. Whether vascular lesions are generated on the eyeground is checked, which is a main basis for early diagnosis of the diseases, realizes early examination, early diagnosis and early prevention, and effectively treats patients before irreversible retinal damage occurs, so that eyeground screening has very important clinical significance.
Currently, fundus images are generally acquired by fundus cameras to observe and analyze the retina and the like of the fundus. The conventional fundus camera has an eyepiece structure, and the fundus needs to be focused through the eyepiece observation, and then fundus pictures are acquired through a photographing system. When acquiring fundus images, the fundus should be facing to acquire an image of the complete desired fundus area. However, in actual use, it is difficult to ensure that an image of the entire desired fundus area is acquired due to operation inaccuracy or individual differences.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a self-photographing fundus camera, which is convenient to operate, and has better accuracy, and a user can photograph the fundus camera by himself without the assistance of other people after subjectively judging that the fundus camera is aligned to a needed fundus area.
In order to solve the technical problems, the invention adopts the following technical scheme:
The self-photographing fundus camera comprises an ocular lens group, a hollow reflecting mirror, an imaging mirror group and an image acquisition device which are sequentially arranged, wherein the self-photographing fundus camera further comprises an illumination system for illuminating the fundus, the illumination system comprises a first light source for emitting a first light beam for illumination, and the hollow reflecting mirror is used for reflecting the first light beam to illuminate the fundus; the self-timer fundus camera further comprises a correction system for subjectively judging whether eyes of a user are right against the fundus, the correction system comprises a second light source, an aperture diaphragm and a vision target plate, the second light source, the aperture diaphragm and the vision target plate are sequentially arranged, a central refraction correction vision target and a plurality of pupil position correction vision targets which surround the central vision target are arranged on the vision target plate, and second light beams emitted by the second light source are incident to the fundus through the vision target plate so that eyes can observe the central refraction correction vision target and/or images of the pupil position correction vision target. The distance (focusing) from the eyepiece group to the imaging lens group is adjusted so that the central refraction correction optotype seen by the human eye is minimized, and the image acquisition device is in a photographing state to photograph and store the fundus image when the user himself moves the eye position to see a predetermined number of pupil position correction optotypes.
In some embodiments, the plurality of correction targets are equally spaced and annular around the center target.
In some embodiments, the number of correction targets is a positive integer N, and the given number is N.
In some embodiments, the central refractive correction target and/or the pupil position correction target are light holes open on the target plate. The aperture diaphragm shields different pupil positions of different view field points (a central light-transmitting hole and an edge light-transmitting hole) of the sighting target plate so as to enable the central light-transmitting hole to be a refraction correction sighting target and the edge light-transmitting hole to be an eye pupil correction sighting target.
In some embodiments, the central refraction correction optotype is a first light hole formed in the middle of the optotype plate, and a first optical filter is arranged on the first light hole; the eye pupil position correction optotype is respectively located in second light holes formed in the edge of the optotype plate, and second optical filters are respectively arranged on the second light holes.
In some embodiments, the first filter and the second filter are different from each other in color.
In some embodiments, the second light source is a visible light source, preferably a visible light LED.
In some embodiments, the aperture stop is provided with a central light hole corresponding to the first light hole and edge light holes corresponding to the second light holes respectively.
In some embodiments, the illumination system further comprises a half mirror disposed between the first light source and the hollow mirror for reflecting a first light beam to the hollow mirror, and the correction system is disposed in an incident light path of the half mirror for transmitting the second light beam to the hollow mirror.
In some embodiments, a second mirror is also disposed between the eyepiece group and the hollow mirror.
In some embodiments, the image acquisition device is a camera or video camera. By adopting the technical scheme, the invention has the following advantages compared with the prior art:
According to the self-photographing fundus camera provided by the invention, the central refraction correction optotype and the plurality of pupil position correction optotypes are arranged, the distance from the ocular lens group to the imaging lens group is automatically adjusted by a user, so that the image of the central refraction correction optotype seen by eyes of the user is minimized, then the eyes of the user can see all the edge optotypes by moving the positions of the eyes relative to the ocular lens group up and down and left and right, finally, the fundus image is photographed and stored, the operation is convenient, the assistance of other people is not needed, and the user can realize fundus image acquisition by self-photographing.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of an optical system of a self-photographing fundus camera according to the present invention;
FIG. 2 is a schematic diagram of a correction system according to the present invention;
Fig. 3 is a view of a fundus image before focusing;
fig. 4 is a view of the fundus image after focusing.
Wherein, 1, human eyes; 2. an eyepiece group; 3. a reflecting mirror; 4. a hollow mirror; 5. an imaging lens group; 6. an image acquisition device; 7. a first light source; 70. a first light beam; 8. a reflecting mirror; 9. a half-mirror; 10. a visual target board; 11. an aperture stop; 12. a second light source; 120. a second light beam;
101. A first light hole; 102. a second light hole; 121. a green light beam; 122. a red light beam;
201. A central refraction correction optotype; 202. correcting the visual target image by the pupil position;
103. a central light hole; 104. and an edge light hole.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The embodiment provides a fundus camera, in particular to a self-photographing fundus camera which is not assisted by others. Referring to fig. 1, the self-photographing fundus camera includes an eyepiece group 2, a hollow mirror 4, an imaging mirror group 5 and an image acquisition device 6 which are sequentially arranged near an eye 1, and further includes an illumination system for illuminating the fundus, the illumination system includes a first light source 7 for emitting a first light beam 70 for illumination, the hollow mirror 4 is used for reflecting the first light beam 70 to illuminate the fundus of the eye 1 and passing light reflected from the retina of the fundus to be imaged by the imaging mirror group 5 and then to be acquired by the image acquisition device 6. The image capturing device user captures and stores the image in a capturing state after the observed image is the desired complete image, and may be stored on the image capturing device 6 with a memory or an external memory electrically connected to the image capturing device 6. The dashed line in fig. 1 represents the optical axis of the optical system. The image acquisition device 6 is a device such as a camera or a video camera for acquiring an image or further storing and transmitting the acquired image. The fundus camera also includes a correction system for determining whether the fundus is facing. The correction system comprises a second light source 12, an aperture diaphragm 11 and a sighting target plate 10 which are sequentially arranged, as shown in fig. 2, a central refraction correction sighting target for eyes to observe and watch and a plurality of pupil position correction sighting targets arranged around the central sighting target are arranged on the sighting target plate 10, a central light hole 103 and a plurality of edge light holes 104 are formed in the aperture diaphragm 11, different pupil positions of different view points of the sighting target plate 12 are shielded, so that the central light hole 103 corresponds to the refraction correction sighting target, and the edge light holes 104 correspond to the pupil correction sighting target. The second light beam 120 emitted from the second light source 12 is incident to the fundus through the central light hole 103, the edge light hole 104 and the optotype plate 10 of the aperture diaphragm 11 to form a central refraction correction optotype image 201 and/or an eye pupil position correction optotype image 202, and when the image acquisition device observes that the central refraction correction optotype image 201 and the eye pupil position correction optotype images 202 with a preset number are observed by the human eye, the fundus image is photographed and stored. When the number of correction targets is N and the number of pupil position correction target images 202 is N, as in fig. 3 and 4, N is 4, and 4 pupil position correction target images 202 are displayed in the collected fundus image, the collected fundus image is a complete image, and then photographing is performed to save the fundus image. When a user shoots a fundus image of himself, the distance from the ocular lens group 2 to the imaging lens group 5 is adjusted so that the central refraction correction sighting target image 201 seen by human eyes is minimum, and then when the user moves the eye positions to see a set number of pupil position correction sighting target images 202, the fundus image at that time is shot and stored by a camera or a video camera.
In this embodiment, the central refraction correction optotype is arranged at the central position of the optotype board 10 and corresponds to the central light hole 103 of the aperture diaphragm 11, and is in a circular shape or a ring shape; the pupil position correction optotypes are arranged at equal intervals and distributed annularly around the central refraction correction optotype, and respectively correspond to the light holes 104 on the edges of the aperture optical cable 11, and the pupil position correction optotype is circular. As shown in fig. 2, the central refraction correction optotype is a first light hole 101 formed in the middle of the optotype plate 10 and opposite to the central light hole 103, the first light hole 101 is a circular hole or a circular ring-shaped hole, and a first optical filter is arranged on the first light hole 101; the pupil position correction optotype is respectively provided with second light holes 102 at the edge of the optotype board 10, the second light holes 102 are round holes, and each second light hole 102 is respectively provided with a second optical filter. In order to easily distinguish the central refraction correction target image 201 and the pupil position correction target image 202 on the fundus image, the first filter and the second filter are different in color from each other, for example, the first filter is a green filter and the second filter is a red filter. The second light source 12 is a visible light source, such as a visible light LED, and visible light rays emitted by the visible light source are formed into a second light beam 120 after passing through the aperture optical cable diaphragm 11, the second light beam 120 includes an annular pupil cone-shaped green light beam 121, the principal ray formed by the visible light rays passing through the first light holes 101 and the first optical filters is parallel to the optical axis, and the visible light rays passing through the 4 second light holes 102 and the second optical filters thereon respectively form 4 red linear light beams 122. The green light beam 121 is reflected by the hollow reflecting mirror to enter human eyes, and is converged into a green light point if the focusing of the system is completed, and a green light ring is formed if defocusing exists. The 4 red light beams 122 are reflected by the hollow reflecting mirror and enter the human eye along four edges of the pupil of the human eye, four pupil position correction light spots are formed around the central refraction correction optotype, if the refractive adjustment of the human eye of the image acquisition device is correct, the green central refraction correction optotype 201 is seen to become the smallest light spot, if the upper, lower, left and right positions of the human eye are aligned, the four pupil correction light beams can all enter the fundus, the human eye can see the 4 red pupil position correction optotypes, and otherwise, part of the points disappear.
The illumination system further comprises a half mirror 9 arranged between the first light source 7 and the hollow mirror 4, the correction system being arranged in the incident light path of the half mirror 9, the half mirror 9 reflecting the first light beam 70 to the hollow mirror 4 allowing the second light beam to be transmitted to the hollow mirror 4. The illumination system further comprises a mirror 8, the mirror 8 being arranged between the first light source 7 and the half mirror 9 for reflecting the first light beam 70 onto the half mirror 9.
A further mirror 3 is arranged between the ocular lens set 2 and the hollow mirror 4 for re-reflecting the first light beam 70 and the second light beam 120 reflected by the hollow mirror 4 to the fundus and for reflecting the light reflected from the retina to pass through the aperture of the hollow mirror 4 and to be imaged by the imaging lens set 5 and then collected by the image acquisition device 6. The focal length of the imaging system is adjustable, such as a central optotype 201 and a correction optotype 202 in an unfocused fundus image shown in fig. 3, and a central optotype 201 and a correction optotype 202 in an adjusted fundus image shown in fig. 4. The method for making the central optotype clear after focusing is to make the central green ring become a solid circle after adjusting.
In the self-photographing fundus camera provided by the invention, the central refraction correction optotype and the plurality of pupil position correction optotypes are arranged, the images of the plurality of correction optotypes surrounding the central optotype are overlapped on the images formed by the fundus, whether the images of the complete required fundus area meeting the requirements are acquired or not is judged by the number of the correction optotypes displayed on the acquired fundus images, only the fundus images with the number of the correction optotypes reaching the set number are selected for photographing and storing, whether the fundus camera is aligned or not can be more intuitively judged, the operation is convenient, the assistance of other people is not needed, and the user can realize the fundus image acquisition by self-photographing.
The above-described embodiments are provided for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, not to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (6)
1. The self-photographing fundus camera comprises an ocular lens group, a hollow reflecting mirror, an imaging mirror group and an image acquisition device which are sequentially arranged, wherein the self-photographing fundus camera further comprises an illumination system for illuminating the fundus, the illumination system comprises a first light source for emitting a first light beam for illumination, and the hollow reflecting mirror is used for reflecting the first light beam to illuminate the fundus; the self-timer fundus camera is characterized by further comprising a correction system for subjective judgment of a user whether the image acquisition device is right opposite to the fundus, wherein the correction system comprises a second light source, an aperture diaphragm and a sighting target plate which are sequentially arranged, the second light source is a visible light source, a central refraction correction sighting target and a plurality of pupil position correction sighting targets which are arranged around the central refraction correction sighting target are arranged on the sighting target plate, a second light beam emitted by the second light source is incident to the fundus through the sighting target plate so that the central refraction correction sighting target and/or an image of the pupil position correction sighting target can be observed by the human eye, and when the distance from the ocular lens group to the imaging lens group is adjusted so that the image of the central refraction correction sighting target seen by the human eye is minimum and a set number of pupil position correction sighting targets are seen through the movement of the user, the image acquisition device is in a shooting state so as to shoot the fundus image; the central refraction correction visual target and/or the pupil position correction visual target are/is light holes formed in the visual target plate, the central refraction correction visual target is a first light hole formed in the middle of the visual target plate, and a first optical filter is arranged on the first light hole; the eye pupil position correction optotype is respectively positioned in second light holes formed in the edge of the optotype plate, and second optical filters are respectively arranged on the second light holes; the aperture diaphragm is provided with a center light hole corresponding to the first light hole and edge light holes corresponding to the second light holes respectively.
2. A self-photographing fundus camera according to claim 1, wherein said plurality of pupil position correction optotypes are equally spaced and annular around said central refractive correction optotype.
3. The self-timer fundus camera according to claim 1, wherein the number of the pupil position correction subjects is a positive integer N, and the predetermined number is N.
4. The self-timer fundus camera according to claim 1, wherein the first filter and the second filter are different in color from each other.
5. The self-photographing fundus camera according to claim 1, wherein said illumination system further comprises a half mirror provided between said first light source and said hollow mirror for reflecting a first light beam to said hollow mirror, said correction system being provided in an incident light path of said half mirror for transmitting said second light beam to said hollow mirror; and/or a second reflecting mirror is arranged between the ocular lens group and the hollow reflecting mirror.
6. A self-photographing fundus camera according to claim 1, wherein the image acquisition means is a camera or video camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810207586.7A CN108514402B (en) | 2018-03-14 | 2018-03-14 | Self-timer fundus camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810207586.7A CN108514402B (en) | 2018-03-14 | 2018-03-14 | Self-timer fundus camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108514402A CN108514402A (en) | 2018-09-11 |
| CN108514402B true CN108514402B (en) | 2024-05-28 |
Family
ID=63433670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810207586.7A Active CN108514402B (en) | 2018-03-14 | 2018-03-14 | Self-timer fundus camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108514402B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109758115B (en) * | 2019-02-26 | 2024-04-12 | 上海鹰瞳医疗科技有限公司 | Guide assembly and fundus camera |
| CN111035358B (en) * | 2019-12-28 | 2022-03-11 | 重庆贝奥新视野医疗设备有限公司 | Stray light eliminating system of fundus camera and working method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05154112A (en) * | 1991-11-30 | 1993-06-22 | Nidek Co Ltd | Ophthalmologic device |
| JPH08317905A (en) * | 1995-05-26 | 1996-12-03 | Canon Inc | Eyeground camera |
| JPH1033480A (en) * | 1996-07-22 | 1998-02-10 | Canon Inc | Optometry apparatus |
| CN104042185A (en) * | 2014-06-23 | 2014-09-17 | 屠军 | Fundus digital imaging system |
| CN105011898A (en) * | 2015-08-04 | 2015-11-04 | 深圳市斯尔顿科技有限公司 | Self-service type infrared eccentric photorefractor and self-service photorefraction method |
| CN208551764U (en) * | 2018-03-14 | 2019-03-01 | 苏州兆乘四海通科技有限公司 | A kind of self-timer fundus camera |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7258440B2 (en) * | 2003-04-15 | 2007-08-21 | Kowa Company Ltd. | Ophthalmic photographic apparatus |
| US7621636B2 (en) * | 2007-01-10 | 2009-11-24 | Clarity Medical Systems, Inc. | Working distance and alignment sensor for a fundus camera |
-
2018
- 2018-03-14 CN CN201810207586.7A patent/CN108514402B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05154112A (en) * | 1991-11-30 | 1993-06-22 | Nidek Co Ltd | Ophthalmologic device |
| JPH08317905A (en) * | 1995-05-26 | 1996-12-03 | Canon Inc | Eyeground camera |
| JPH1033480A (en) * | 1996-07-22 | 1998-02-10 | Canon Inc | Optometry apparatus |
| CN104042185A (en) * | 2014-06-23 | 2014-09-17 | 屠军 | Fundus digital imaging system |
| CN105011898A (en) * | 2015-08-04 | 2015-11-04 | 深圳市斯尔顿科技有限公司 | Self-service type infrared eccentric photorefractor and self-service photorefraction method |
| CN208551764U (en) * | 2018-03-14 | 2019-03-01 | 苏州兆乘四海通科技有限公司 | A kind of self-timer fundus camera |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108514402A (en) | 2018-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11813024B2 (en) | Hand-held portable fundus camera for screening photography | |
| CA2730720C (en) | Apparatus and method for imaging the eye | |
| US20230255480A1 (en) | Alignment improvements for ophthalmic diagnostic systems | |
| CN209611102U (en) | Adapter and Fundus Camera System comprising adapter | |
| US10542885B2 (en) | Retinal cellscope apparatus | |
| US6296358B1 (en) | Ocular fundus auto imager | |
| US7025459B2 (en) | Ocular fundus auto imager | |
| US10039450B2 (en) | Ophthalmologic apparatus | |
| JP2007513703A (en) | Retina imaging system | |
| US7360895B2 (en) | Simplified ocular fundus auto imager | |
| US9131837B2 (en) | Method and apparatus for imaging the choroid | |
| CN108514402B (en) | Self-timer fundus camera | |
| US11974809B2 (en) | Non-mydriatic, non-contact system and method for performing widefield fundus photographic imaging of the eye | |
| JP2014073205A (en) | Ophthalmographic device | |
| CN208551764U (en) | A kind of self-timer fundus camera | |
| CN109497943A (en) | A kind of lens module and the fundus camera with the lens module | |
| EP3440990A1 (en) | System for imaging a fundus of an eye | |
| CN213097815U (en) | Fundus camera with coaxial illumination light source and fixation light source | |
| CN116982927A (en) | Multi-lens ophthalmic examination equipment and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |