CN210810966U - Large-view-field fundus high-resolution imaging system - Google Patents
Large-view-field fundus high-resolution imaging system Download PDFInfo
- Publication number
- CN210810966U CN210810966U CN201921006373.4U CN201921006373U CN210810966U CN 210810966 U CN210810966 U CN 210810966U CN 201921006373 U CN201921006373 U CN 201921006373U CN 210810966 U CN210810966 U CN 210810966U
- Authority
- CN
- China
- Prior art keywords
- lens
- imaging
- radius
- curvature
- imaging system
- 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
- 238000003384 imaging method Methods 0.000 title claims abstract description 77
- 230000000007 visual effect Effects 0.000 claims abstract description 6
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 3
- 210000001525 retina Anatomy 0.000 claims description 8
- 230000005499 meniscus Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 210000001747 pupil Anatomy 0.000 abstract description 9
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 230000021615 conjugation Effects 0.000 abstract description 3
- 230000003071 parasitic effect Effects 0.000 abstract description 3
- 210000000695 crystalline len Anatomy 0.000 description 124
- 230000004075 alteration Effects 0.000 description 7
- 230000002207 retinal effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000005286 illumination Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 5
- 210000004220 fundus oculi Anatomy 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000002747 omentum Anatomy 0.000 description 2
- 208000014733 refractive error Diseases 0.000 description 2
- 206010020675 Hypermetropia Diseases 0.000 description 1
- 210000002159 anterior chamber Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 210000004087 cornea Anatomy 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 201000006318 hyperopia Diseases 0.000 description 1
- 230000004305 hyperopia Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- CNQCVBJFEGMYDW-UHFFFAOYSA-N lawrencium atom Chemical compound [Lr] CNQCVBJFEGMYDW-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 208000001491 myopia Diseases 0.000 description 1
- 230000004379 myopia Effects 0.000 description 1
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000004127 vitreous body Anatomy 0.000 description 1
Images
Abstract
The utility model discloses a high resolution imaging system of big visual field eye ground, including nethike embrane objective group, focusing lens, speculum, imaging lens group and imaging surface, the emergent light of people's eye sees through nethike embrane objective group, focusing lens, speculum and imaging lens group in proper order, and imaging lens group is in with the emergent light imaging of speculum on the imaging surface, the shape of speculum is cyclic annular cavity. The utility model discloses system architecture is comparatively simple, has realized high quality formation of image, speculum and human eye pupil conjugation only allow imaging light to pass through, have avoided during the reverberation entering imaging light path of nethike embrane objective group, effectively restrain the parasitic light.
Description
Technical Field
The utility model relates to an eye ground medical imaging technical field, more specifically say and relate to big visual field eye ground high resolution imaging system.
Background
The fundus camera is a medical instrument which illuminates the fundus oculi through an illumination system and images the fundus oculi onto a photosensitive chip of a CCD or CMOS camera through an imaging system so as to acquire fundus oculi images. The fundus camera is used for checking whether the fundus of the eye is abnormal such as retina observation, optic disc, blood vessel distribution and the like, and has important significance for diagnosing and preventing ophthalmic diseases and blood vessel related diseases. Large fundus camera equipment is expensive and has poor portability, and professional medical personnel who are needed operate the equipment, and in order to popularize fundus examination, a handheld fundus camera which is small in size, low in cost and easy to operate is needed.
Patent CN108309228A realizes a portable fundus camera with a full field angle of 30 ° and a total system length of not more than 250 mm. The fundus camera imaging system consists of an eye objective and an imaging objective, the optical path is simpler, but only a 30-degree fundus detection view field is provided, the obtained fundus information is less, and a doctor cannot accurately judge the state of an illness.
Patent CN104224109A realizes a fundus camera combined with OCT system, which can be used to obtain good OCT tomographic images of the fundus of human eyes with different dioptres, but its system is rather complex, has poor portability, and is not suitable for popularization of fundus examination.
The fundus camera optical system in the prior art has the advantages of small detection full field angle, less acquired fundus information, complex structure, poor portability and inapplicability to popularization of fundus examination, and meanwhile, a part of systems are added with the polarization beam splitter prism, so that the energy utilization rate is low.
SUMMERY OF THE UTILITY MODEL
The utility model provides a simple structure is applicable to the high resolution imaging system of big visual field eye ground of eye ground inspection.
The utility model provides a solution of its technical problem is:
big visual field eye ground high resolution imaging system, including omentum objective lens group, focusing lens, speculum, formation of image lens group and imaging surface, the emergent light of people's eye sees through omentum objective lens group, focusing lens, speculum and formation of image lens group in proper order, and formation of image lens group is in the emergent light of speculum is imaged on the imaging surface, and the shape of speculum is cyclic annular cavity.
As a further improvement of the above technical solution, the retina objective lens group includes a first lens element, a second lens element and a third lens element.
As a further improvement of the above technical solution, the first lens and the second lens form a first cemented doublet, and the third lens is an aspheric single lens.
As a further improvement of the above technical solution, the curvature radius of the first lens is-124.337 mm;
the curvature radius of the front surface of the second lens is-24.123 mm, and the curvature radius of the rear surface of the second lens is-71.562 mm;
the radius of curvature of the front surface of the third lens is 40.025mm, and the radius of curvature of the rear surface of the third lens is-95.331 mm.
As a further improvement of the above technical solution, the imaging lens group includes a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens.
As a further improvement of the above technical solution, the fourth lens and the fifth lens form a double-split lens, the seventh lens and the eighth lens form a second double-cemented lens, and the sixth lens is a single lens.
As a further improvement of the above technical solution, the front surface curvature radius of the fourth lens is 91.324mm, and the rear surface curvature radius is 52.348 mm;
the curvature radius of the front surface of the fifth lens is-245.924 mm, and the curvature radius of the rear surface of the fifth lens is 48.468 mm;
the curvature radius of the front surface of the sixth lens is 85.364mm, and the curvature radius of the rear surface of the sixth lens is-114.672 mm;
the curvature radius of the seventh lens is 29.068 mm;
the radius of curvature of the front surface of the eighth lens is-15.637 mm, and the radius of curvature of the rear surface of the eighth lens is 31.268 mm.
As a further improvement of the above technical solution, the inner radius of the reflector is 5mm, and the outer radius of the reflector is 12 mm.
As a further improvement of the technical scheme, the focusing lens is a meniscus thick lens.
As a further improvement of the above technical solution, the imaging surface is a photosensitive chip of a CCD camera or a CMOS camera.
The utility model has the advantages that: the utility model discloses system architecture is comparatively simple, has realized high quality formation of image, speculum and human eye pupil conjugation only allow imaging light to pass through, have avoided during the reverberation entering imaging light path of nethike embrane objective group, effectively restrain the parasitic light.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.
FIG. 1 is a schematic diagram of an embodiment imaging system;
FIG. 2 is a graph of MTF for an imaging system of an embodiment;
FIG. 3 is a dot diagram of an embodiment imaging system;
FIG. 4 is a light fan diagram of an imaging system of an embodiment.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below with reference to the embodiments and the accompanying drawings, so as to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
In this embodiment, a human eye model 600 is provided, the human eye model 600 is provided in front of the retina objective lens group 100, and the human eye model 600 is a gullsland-Le Grand standard human eye model and can simulate human eye aberrations.
The retinal objective lens group 100 is used for receiving light rays emitted by a fundus of a human eye illuminated by the illumination system, the focusing lens 200 is used for compensating the situation of myopia or hyperopia caused by refractive error of the human eye, an included angle between the reflector 300 and a main optical axis is 45 degrees, and the imaging lens group 400 is used for imaging a fundus image on the imaging surface 500.
The illumination system is a conventional illumination system, and is mainly used for illuminating the fundus of a human eye.
The illumination system illuminates the fundus of the human eye, the fundus serves as a secondary light source to emit emergent light, and the emergent light is emitted out close to parallel light after passing through human eye structures with different refractive indexes and thicknesses such as a vitreous body, a crystalline lens, a pupil, an anterior chamber and a cornea. The pupil is used as an aperture diaphragm of the fundus imaging optical system, the diameter phi of imaging light beams passing through the pupil is limited to 2mm, and the pupil and annular light spots formed by the illumination system at the pupil of the eye are not interfered with each other.
The included angle between the maximum field angle of the emergent light of the human eye model 600 and the main optical axis is close to +/-30 degrees, the emergent light reaches the retina objective lens group 100 after passing through a section of working distance of about 24mm, the diameter of the lens of the retina objective lens group 100 is larger than 40mm, the emergent light passes through the retina objective lens group 100 to be imaged for the first time, and the imaging quality is not optimized at this time.
The exit light from the retinal objective lens assembly 100 passes through the focusing lens 200, and the focusing lens 200 is used to compensate for myopic or hyperopic conditions of refractive error of the human eye. The variable is set by the focusing mirror 200 and the mesh objective lens group 100 together, the height of the light rays of different view fields in the reflector 300 is controlled, the rear working distance of the focusing mirror 200 is larger than 30mm, and the requirement of placing the reflector 300 is met.
Light rays are focused by the focusing lens 200 and then emitted to the reflecting mirror 300, the light rays pass through the hollow part of the reflecting mirror 300 and are emitted into the imaging lens group 400 as imaging light rays, and after the imaging light rays pass through the imaging lens group 400, the imaging lens group 400 images the imaging light rays carrying fundus information on an imaging surface 500. Imaging light passes through reflector 300 and passes through a section of back working distance about 15mm to imaging lens group 400, and imaging lens group 400 maximum lens diameter is about 11mm, and the biggest air interval is about 7mm, and back working distance is about 23 mm.
The shape of the reflector 300 is a ring-shaped hollow, and the reflector is conjugated with the human eye model 600, so that the reflected light of the retina objective lens group 100 is prevented from entering an imaging light path by the reflecting part, and stray light is effectively inhibited.
The utility model discloses system architecture is comparatively simple, has realized high quality formation of image, speculum 300 and human eye pupil conjugation only allow imaging light to pass through, have avoided nethike embrane objective group 100's reverberation to get into the formation of image light path, effectively restrain the parasitic light.
In a preferred embodiment, the retinal objective lens group 100 includes a first lens element 101, a second lens element 102, and a third lens element 103.
In a preferred embodiment, the first lens 101 and the second lens 102 form a first cemented doublet, and the third lens 103 is an aspheric single lens.
The retinal objective lens assembly 100 is composed of a first cemented doublet for eliminating chromatic aberration and an aspheric single lens for eliminating partial human eye aberration.
In a preferred embodiment, the radius of curvature of the first lens 101 is-124.337 mm;
the curvature radius of the front surface of the second lens 102 is-24.123 mm, and the curvature radius of the rear surface is-71.562 mm;
the radius of curvature of the front surface of the third lens 103 is 40.025mm, and the radius of curvature of the rear surface is-95.331 mm.
As a preferred embodiment, the imaging lens group 400 includes a fourth lens 401, a fifth lens 402, a sixth lens 403, a seventh lens 404, and an eighth lens 405.
In a preferred embodiment, the fourth lens 401 and the fifth lens 402 constitute a double-split lens, the seventh lens 404 and the eighth lens 405 constitute a second double-cemented lens, and the sixth lens 403 is a single lens.
The imaging lens assembly 400 adopts a typical wide-angle eyepiece-a combined lens assembly of a double cemented lens, a single lens and a double cemented lens as an initial structure, wherein the first double cemented lens is mainly used for balancing aberration, and the field curvature of the large field system is considered to be larger, the utility model discloses a positive and negative focal power separation is carried out on the first double cemented lens used for balancing aberration to correct the field curvature, obtain the double-separation lens, therefore the utility model discloses well imaging lens assembly 400 includes the double-separation lens, the single lens and the double-cemented lens of second, wherein the single lens and the double-cemented lens of second constitute the eyepiece.
In a preferred embodiment, the radius of curvature of the front surface of the fourth lens 401 is 91.324mm, and the radius of curvature of the rear surface is 52.348 mm;
the front surface curvature radius of the fifth lens 402 is-245.924 mm, and the rear surface curvature radius is 48.468 mm;
the curvature radius of the front surface of the sixth lens 403 is 85.364mm, and the curvature radius of the rear surface of the sixth lens is-114.672 mm;
the curvature radius of the seventh lens 404 is 29.068 mm;
the eighth lens 405 has a front surface curvature radius of-15.637 mm and a rear surface curvature radius of 31.268 mm.
In a preferred embodiment, the inner radius of the reflector 300 is 5mm, and the outer radius of the reflector 300 is 12 mm.
The hollow part of the reflector 300 allows imaging light to pass through, and the hollow part of the reflector 300 is conjugated with the pupil of the human eye and plays a role in eliminating system stray light together.
In a preferred embodiment, the imaging surface 500 is a photosensitive chip of a CCD camera or a CMOS camera.
The imaging surface 500 is used for absorbing the imaging light transmitted through the reflector 300 and forming a clear image.
In a preferred embodiment, the focusing lens 200 is a meniscus thick lens.
The focusing lens 200 is a meniscus thick lens and is used for adjusting the abnormal diopter of human eyes, so that the light rays of the eye ground can be clearly imaged on a photosensitive chip of a CCD (charge coupled device) camera or a CMOS (complementary metal oxide semiconductor) camera to obtain an eye ground image, and meanwhile, the focusing lens plays a certain role in correcting field curvature.
Referring to fig. 2, fig. 2 is a MTF curve graph of the system, the MTF curve is greater than 0.3 at the nyquist frequency of 145lp/mm, the structure of the fundus can be resolved at 6 μm, and the mean diameter of retinal capillaries is 6-9 μm, which illustrates that the system has high fundus resolution.
Referring to FIG. 3, FIG. 3 is a dot diagram of the present system showing that the RMS radius of each field is less than 4.278 μm, comparable to the diffraction limited airy disk size, illustrating the high image quality of the present system.
Referring to fig. 4, fig. 4 is a light fan diagram of the system, the maximum scale of the light fan diagram is ± 20 μm, which illustrates that the aberration of each field at the image plane is small, and the aberration correction capability of the system is strong.
The system realizes the fundus imaging with 55 degrees of large visual field, obtains fundus information and increases the fundus information, and is beneficial to doctors to judge the illness state of patients more accurately.
The system realizes the resolution of the fundus 6 μm structure, has high imaging quality, the MTF is more than 0.6 at the position of 70lp/mm, the MTF is more than 0.3 at the position of 145lp/mm, and the maximum RMS radius is 4.278 μm.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.
Claims (10)
1. Big visual field eye ground high resolution imaging system, its characterized in that, including nethike embrane objective lens group, focusing lens, speculum, imaging lens group and imaging surface, the emergent light of people's eye sees through nethike embrane objective lens group, focusing lens, speculum and imaging lens group in proper order, and imaging lens group is in the emergent light of speculum is imaged on the imaging surface, and the shape of speculum is cyclic annular cavity.
2. The large field of view fundus high resolution imaging system of claim 1, wherein: the retina objective lens group comprises a first lens, a second lens and a third lens.
3. The large field of view fundus high resolution imaging system of claim 2, wherein: the first lens and the second lens form a first doublet lens, and the third lens is an aspheric single lens.
4. The large field of view fundus high resolution imaging system of claim 2, wherein:
the curvature radius of the first lens is-124.337 mm;
the curvature radius of the front surface of the second lens is-24.123 mm, and the curvature radius of the rear surface of the second lens is-71.562 mm;
the radius of curvature of the front surface of the third lens is 40.025mm, and the radius of curvature of the rear surface of the third lens is-95.331 mm.
5. The large field of view fundus high resolution imaging system of claim 1, wherein: the imaging lens group includes a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens.
6. The large field of view fundus high resolution imaging system of claim 5, wherein: the fourth lens and the fifth lens form a double-separation lens, the seventh lens and the eighth lens form a second double-cemented lens, and the sixth lens is a single lens.
7. The large field of view fundus high resolution imaging system of claim 5, wherein: the radius of curvature of the front surface of the fourth lens is 91.324mm, and the radius of curvature of the rear surface of the fourth lens is 52.348 mm;
the curvature radius of the front surface of the fifth lens is-245.924 mm, and the curvature radius of the rear surface of the fifth lens is 48.468 mm;
the curvature radius of the front surface of the sixth lens is 85.364mm, and the curvature radius of the rear surface of the sixth lens is-114.672 mm;
the curvature radius of the seventh lens is 29.068 mm;
the radius of curvature of the front surface of the eighth lens is-15.637 mm, and the radius of curvature of the rear surface of the eighth lens is 31.268 mm.
8. The large field of view fundus high resolution imaging system of claim 1, wherein: the inner radius of the reflector is 5mm, and the outer radius of the reflector is 12 mm.
9. The large field of view fundus high resolution imaging system of claim 1, wherein: the focusing lens is a meniscus thick lens.
10. The large field of view fundus high resolution imaging system of claim 1, wherein: the imaging surface is a photosensitive chip of a CCD camera or a CMOS camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921006373.4U CN210810966U (en) | 2019-06-28 | 2019-06-28 | Large-view-field fundus high-resolution imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921006373.4U CN210810966U (en) | 2019-06-28 | 2019-06-28 | Large-view-field fundus high-resolution imaging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210810966U true CN210810966U (en) | 2020-06-23 |
Family
ID=71268085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921006373.4U Active CN210810966U (en) | 2019-06-28 | 2019-06-28 | Large-view-field fundus high-resolution imaging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210810966U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110236484A (en) * | 2019-06-28 | 2019-09-17 | 佛山科学技术学院 | Big visual field eyeground high resolution imaging system |
| CN113208559A (en) * | 2021-05-18 | 2021-08-06 | 中国科学院长春光学精密机械与物理研究所 | Large-view-field non-mydriatic wide refraction compensation eye fundus imaging optical system |
| CN113261917A (en) * | 2021-05-18 | 2021-08-17 | 中国科学院长春光学精密机械与物理研究所 | Wide-field-of-view non-mydriatic wide-refraction compensation common-path infrared eye fundus imaging system |
-
2019
- 2019-06-28 CN CN201921006373.4U patent/CN210810966U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110236484A (en) * | 2019-06-28 | 2019-09-17 | 佛山科学技术学院 | Big visual field eyeground high resolution imaging system |
| CN110236484B (en) * | 2019-06-28 | 2024-02-13 | 佛山科学技术学院 | Large-view-field fundus high-resolution imaging system |
| CN113208559A (en) * | 2021-05-18 | 2021-08-06 | 中国科学院长春光学精密机械与物理研究所 | Large-view-field non-mydriatic wide refraction compensation eye fundus imaging optical system |
| CN113261917A (en) * | 2021-05-18 | 2021-08-17 | 中国科学院长春光学精密机械与物理研究所 | Wide-field-of-view non-mydriatic wide-refraction compensation common-path infrared eye fundus imaging system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110236484B (en) | Large-view-field fundus high-resolution imaging system | |
| US5479222A (en) | Indirect ophthalmoscopy lens system and adapter lenses | |
| CN104883954B (en) | For operating the apparatus and method of the biggest power range order Wavefront sensor | |
| CN210810966U (en) | Large-view-field fundus high-resolution imaging system | |
| US7255442B2 (en) | Device for measuring aberrations in an eye-type system | |
| WO2012176026A1 (en) | Retinal imaging device | |
| JPH09504119A (en) | Slit lamp Indirect ophthalmoscope lens for use in biomicroscopy | |
| JPH09294720A (en) | Ophthalmologic instrument | |
| CN101248981A (en) | Visual optics analysis system based on wave-front abberration | |
| CN101718542B (en) | Optical ranging device and portable refractometer thereof | |
| US20080218685A1 (en) | Goggles for Improved Ocular Vision | |
| JP6265984B2 (en) | Wide angle optics for ophthalmic implants | |
| CN210582453U (en) | Portable mydriasis-free eye fundus camera | |
| WO2023005252A1 (en) | Ophthalmic instrument for measuring optical quality of eyes | |
| CN110367925B (en) | Subjective and objective integrated diagnostic optometry device and optometry method | |
| CN113208559A (en) | Large-view-field non-mydriatic wide refraction compensation eye fundus imaging optical system | |
| CN103284688A (en) | Structural dark field adaptive optics retina imager | |
| CN103767675A (en) | Imaging corneal curvimeter optical system | |
| CN108514402A (en) | A kind of self-timer fundus camera | |
| CN101248982A (en) | Visual optics analysis system | |
| CN111308701B (en) | Optical system for OCT (optical coherence tomography) fundus large-field high-resolution imaging | |
| Parel et al. | The optics of the ophthalmoscope and related instruments | |
| US10327634B2 (en) | Ophthalmic lens doublet for ophthalmoscopy | |
| CN114732353B (en) | High-resolution fundus optical imaging system | |
| CN114711714B (en) | Large-view-field miniaturized fundus imaging optical system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: DONGGUAN LVBANG INTELLIGENT TECHNOLOGY Co.,Ltd. Assignor: FOSHAN University Contract record no.: X2022990000856 Denomination of utility model: Large field of view fundus high-resolution imaging system Granted publication date: 20200623 License type: Common License Record date: 20221031 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen shenghangte Technology Co.,Ltd. Assignor: FOSHAN University Contract record no.: X2022980026644 Denomination of utility model: High-resolution fundus imaging system with large field of view Granted publication date: 20200623 License type: Common License Record date: 20230110 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: DONGGUAN LVBANG INTELLIGENT TECHNOLOGY Co.,Ltd. Assignor: FOSHAN University Contract record no.: X2022990000856 Date of cancellation: 20240408 |