CN213309634U - Hand-held type eye ground camera of leading-in illumination light source of optic fibre - Google Patents

Abstract

The utility model discloses a hand-held type eye ground camera of leading-in illuminating light source of optic fibre, including fuselage optical assembly and ophthalmoscope optical assembly, wherein fuselage optical assembly includes near infrared luminescence unit, visible light luminescence unit and light sensing element, and ophthalmoscope optical assembly includes polarizing plate group, formation of image battery of lens, first battery of lens, second battery of lens, third lens and light guide fiber, and wherein light guide fiber includes near infrared luminescence unit light guide fiber, visible light luminescence unit light guide fiber. This hand-held type eye ground camera of leading-in light source of optic fibre has both practiced thrift the cost, has also increased the reliability of equipment, also makes the volume controllable to be littleer simultaneously, in addition, because white light LED packaging technology's reason, there is the poor problem of light beam colour temperature homogeneity, color rendering index homogeneity, and light beam light intensity homogeneity, colour temperature homogeneity through the leading-in of optic fibre are better, and color rendering index is more unified, improvement imaging quality that can be better.

Description

Hand-held type eye ground camera of leading-in illumination light source of optic fibre

Technical Field

The utility model relates to a camera field specifically is a hand-held type eye ground camera of leading-in light source of optic fibre.

Background

Fundus photography is a diagnosis item widely used in ophthalmology, the blood vessels of the fundus are the only blood vessels which can be directly observed by the human body through the body surface, a fundus camera is adopted, a doctor can check whether pathological changes exist in optic nerves, retina, choroid and refraction medium of the fundus, and diagnosis and disease condition judgment can be carried out on other system diseases such as cerebral infarction, cerebral hemorrhage, cerebral arteriosclerosis, brain tumor, diabetes, nephropathy, hypertension and the like with the assistance of the fundus camera.

The traditional desktop fundus camera comprises a complex illuminating system and a complex observing system, and has huge volume and complex system structure; some instruments can be used only by installing specific software on a computer, and the machine does not have an image storage function, and even some instruments cannot work independently without the computer. If pictures are needed, the patients need to take fundus pictures before the apparatus, which is very inconvenient for special patients, such as bedridden patients in hospitals or patients in marginal mountain areas.

The handheld eye fundus camera is small in size and convenient to carry, does not need to carry out mydriasis on a person to be inspected, can be used for simply, quickly and accurately inspecting, and particularly provides convenience for eye fundus inspection of bedridden patients and remote mountain patients.

Handheld fundus cameras are generally divided into two parts: the ophthalmoscope and the body.

The LED light source is a highly integrated illuminating light source which appears in recent years, compared with the traditional light source, the LED has the advantages of long service life, energy conservation, high brightness and the like, but because of the packaging process, the LED light source has the inevitable problems of better light intensity distribution uniformity, color temperature uniformity and color rendering index uniformity in the middle part of the light source and poorer edge part, a photo which is folded and shot by the light source can be different from a real fundus image, and the optical fiber is a light guide fiber with low cost and excellent performance.

In order to solve the problems, a common LED is integrated into the body of the eye fundus camera, and a light source is LED into the eye fundus mirror through an optical fiber, so that the problems of poor color temperature uniformity and poor color rendering index uniformity are solved, and the volume of the eye fundus camera can be controlled to be smaller and more exquisite by utilizing the flexibility of the optical fiber.

The lenses of the handheld fundus cameras sold in the market at present are generally replaceable, the light sources and the light source driving circuit board are generally integrated in the fundus oculi, the infrared LED is used as an observation light source, meanwhile, the white light LED is generally selected as a direct flash lamp light source, when the infrared LED light source is started to serve as an illumination light source, the most clear position is found by focusing, the infrared LED light source is turned off, meanwhile, the flash lamp light source visible light LED is immediately started, and when the eyes of people do not contract as much as the pupils, the photosensitive element obtains images of the fundus oculi through the imaging light path.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a hand-held type eye ground camera of leading-in light source of optic fibre, this hand-held type eye ground camera of leading-in light source of optic fibre, the cost has both been practiced thrift, the reliability of equipment has also been increased, it is littleer also to make the volume controllable simultaneously, in addition, because white light LED packaging technology's reason, there is light beam colour temperature homogeneity, the poor problem of color rendering index homogeneity, via the leading-in light beam light intensity homogeneity of optic fibre, colour temperature homogeneity is better, color rendering index is more unified, improvement imaging quality that can be better.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a handheld fundus camera with an optical fiber leading-in illumination light source comprises a body optical assembly and a fundus lens optical assembly, wherein the body optical assembly comprises a near-infrared light-emitting unit, a visible light-emitting unit and a photosensitive element, the fundus lens optical assembly comprises a polarizer group, an imaging lens group, a first lens group, a second lens group, a third lens and a light guide fiber, the light guide fiber comprises a near-infrared light-emitting unit light guide fiber and a visible light-emitting unit light guide fiber, the near-infrared light-emitting unit light guide fiber is used for leading light beams of the near-infrared light-emitting unit into the imaging lens group of the fundus camera, the light beams close to one side of the second lens group are linearly polarized light after passing through an emergent polarizer of the polarizer group in a mode of deviating from an optical axis, the linearly polarized light is incident to the first lens group and then sequentially passes through the first lens group, a cornea, after the vitreous body, the light is irradiated to the fundus of the eye, the light guide fiber of the visible light emitting unit is used for guiding the light beam of the visible light emitting unit into the imaging lens group of the fundus camera, the emergent end of the light beam deviates from the optical axis, the emergent light beam is emitted to the first lens group of the imaging lens group and finally emitted to the fundus through the lens, the near infrared illumination light source converged to the fundus can become a diffuse reflection light source and become partially depolarized light, then the partially depolarized light sequentially passes through the vitreous body, crystalline lens, pupil, aqueous humor, cornea and the first lens group and is emitted to the polarizer of the polarizer group, only the completely depolarized light or the partially depolarized light can pass through the polarizer of the polarizer group and then sequentially pass through the second lens group and the third lens group to finally reach the photosensitive element, and the polarizer of the polarizer group is used for acquiring the polarized light of the near infrared light emitting, and the reflected polarized light is blocked outside the imaging light path, the imaging lens group comprises a plurality of lens groups for imaging the fundus image to a photosensitive element, and the photosensitive element is used for acquiring the image of the fundus.

Preferably, the near-infrared light emitting unit may be 1 or more LEDs or LDs, or other light emitting devices, and the visible light emitting unit may be 1 or more LEDs or LDs, or other light emitting devices.

Preferably, the near-infrared light-emitting unit light-guiding fiber or the visible light-emitting unit light-guiding fiber may be a fiber bundle composed of 1 or more optical fibers, and the optical fiber may be a plastic optical fiber or a quartz optical fiber or any other medium capable of guiding light.

Preferably, the near-infrared light-emitting unit and the visible light-emitting unit are respectively and closely attached to the infrared light-emitting unit light-guiding fiber and the visible light-emitting unit light-guiding fiber, or the light beams are respectively focused and incident into the near-infrared light-emitting unit light-guiding fiber and the visible light-emitting unit light-guiding fiber through the converging lens.

Preferably, the near-infrared light emitting unit may be incident to 1 near-infrared light emitting unit optical fiber or a near-infrared light emitting unit optical fiber bundle composed of a plurality of near-infrared light emitting unit optical fibers, and the visible light emitting unit may be incident to 1 visible light emitting unit optical fiber or a visible light emitting unit optical fiber bundle composed of a plurality of visible light emitting unit optical fibers.

Preferably, the polarizer set is composed of two or more emergent polarizers and incident polarizers with different polarization directions, and the polarizer set is formed by splicing or separating.

Preferably, the photosensitive element is moved in the optical axis direction of the imaging lens group in a manual or automatic manner to perform focusing.

(III) advantageous effects

The utility model provides a hand-held type eye ground camera of leading-in light source of optic fibre possesses following beneficial effect: the light source and the light source driving circuit board are designed in the machine body and integrated with the machine body circuit board, the light source is guided into the eyeground lens through the plastic optical fiber or other types of optical fibers, the cost is saved, the reliability of equipment is improved, meanwhile, the size can be controlled to be smaller, in addition, due to the white light LED packaging process, the problems of poor uniformity of color temperature and color rendering index of light beams exist, the uniformity of light intensity and color temperature of the light beams guided through the optical fibers are better, the color rendering index is more uniform, and the imaging quality can be better improved.

Drawings

FIG. 1 is a 3D sectional view of an eye fundus camera according to an embodiment of the present invention;

FIG. 2 is a 3D view of an eye fundus camera according to an embodiment of the present invention;

fig. 3 is a schematic diagram of one of the polarizer splicing manners in an embodiment of the present invention;

FIG. 4 is a schematic diagram of one arrangement of light emitting units according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of one of the fiber arrangements in an embodiment of the present invention;

FIG. 6 is a schematic diagram of one arrangement of the light emitting units and the optical fibers according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of an asymmetric arrangement of light emitting units according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of an asymmetrical arrangement of optical fibers according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of an asymmetrical arrangement of light emitting units and optical fibers according to an embodiment of the present invention;

FIG. 10 is a 3D cross-sectional view of an fundus camera with another fiber arrangement according to an embodiment of the present invention (a light emitting unit is attached to a fiber bundle);

FIG. 11 is a 3D view of an fundus camera with another fiber arrangement according to an embodiment of the present invention (a light emitting unit is attached to a fiber bundle);

FIG. 12 is a schematic view of another arrangement of light emitting units according to an embodiment of the present invention;

FIG. 13 is a schematic view of one of another fiber bundle arrangement in an embodiment of the present invention (toward one end of the light source, multiple fibers are bundled together, and the other end is arranged around the optical axis);

fig. 14 is a schematic view of another arrangement of the light-emitting units and the optical fiber bundles according to the embodiment of the present invention (one light-emitting unit is tightly attached to one optical fiber bundle, facing one end of the light source, a plurality of optical fibers are bound together, and the other end is arranged around the optical axis);

in the figure: 1. a body optical assembly; 11a, a near-infrared light emitting unit; 11b, a visible light emitting unit; 12. a photosensitive element; 2. a funduscopic optical component; 21. a first lens group; 22. a second lens group; 23. a third lens group; 24. a set of polarizers; 241. an emergent polarizing plate; 242. an incident polarizing plate; 25. a light guide fiber; 25a, near-infrared light-emitting unit light-guiding fibers; 25b, a visible light emitting unit light guide fiber; 25A, a near-infrared light-emitting unit light-guide fiber bundle; 25B, a visible light emitting unit light guide fiber bundle; 3. an eye; 31. a cornea; 32. aqueous humor; 33. a pupil; 34. a lens; 35. a glass body; 36. fundus oculi; l1, illumination source; l2, diffuse reflection light source; OA, optical axis.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-14, the present invention provides a technical solution: a hand-held fundus camera with an optical fiber led-in illumination light source comprises a body optical assembly 1, a fundus oculi optical assembly 2 and eyes 3, wherein the body optical assembly 1 comprises a near infrared light emitting unit 11a, a visible light emitting unit 11b and a photosensitive element 12, the fundus oculi optical assembly 2 comprises a polarizer group 24, an imaging lens group, a first lens group 21, a second lens group 22, a third lens group 23 and a light guide fiber 25, wherein the light guide fiber 25 comprises a near infrared light emitting unit light guide fiber 25a and a visible light emitting unit light guide fiber 25b, the near infrared light emitting unit light guide fiber 25a is used for leading the light beam of the near infrared light emitting unit 11a into the imaging lens group of the fundus camera, is close to one side of the second lens group 22, becomes linearly polarized light after being emitted 241 through a polarizer in a mode of deviating from an optical axis OA, is incident to the first lens group 21, and then sequentially passes through the first lens group 21, After the cornea 31, the aqueous humor 32, the pupil 33, the crystalline lens 34 and the vitreous body 35 are irradiated to the fundus 36 of the eye 3, the visible light emitting unit light guide fiber 25b is used for guiding the light beam of the visible light emitting unit 11b into the imaging lens group of the fundus camera lens, the light beam exit end deviates from the optical axis OA, the exit light beam is irradiated to the first lens group 21 of the imaging lens group and finally enters the fundus 36 through the lens, the near infrared illumination light source L1 converged on the fundus 36 becomes a diffuse reflection light source L2 and becomes partially depolarized light, then the partially depolarized light sequentially passes through the vitreous body 35, the crystalline lens 34, the pupil 33, the aqueous humor 32, the cornea 31 and the first lens group 21 and enters the incident polaroid 242, only the completely depolarized light or the partially depolarized light can pass through the incident polaroid 242 and then sequentially passes through the second lens group 22 and the third lens group 23 and finally reaches the photosensitive element, the polarizer is used for acquiring the polarized light part of the near infrared light emitting unit 11a or the visible light emitting unit 11b and blocking the reflected polarized light out of the imaging light path, the imaging lens group comprises a plurality of lens groups for imaging the fundus image to the photosensitive element 12, the photosensitive element 12 is used for acquiring the image of the fundus 36, the near infrared light emitting unit 11a can be 1 or more LEDs or LDs or other light emitting devices, the LEDs are light emitting diodes, the LDs are laser diodes, the visible light emitting unit 11b can be 1 or more LEDs or LDs or other light emitting devices, the near infrared light emitting unit light guide fiber 25a or the visible light emitting unit light guide fiber 25b can be a fiber bundle consisting of 1 or more fibers, the fibers can be plastic fibers or quartz fibers or any other light guide medium, the near infrared light emitting unit 11a and the visible light emitting unit 11b are respectively closely attached to the near infrared light emitting unit light guide fiber 25a, the near infrared light emitting unit light guide fiber 25a, The visible light emitting unit light guide fiber 25b, or the light beams focused by the condensing lens to enter the near-infrared light emitting unit light guide fiber 25A and the visible light emitting unit light guide fiber 25b, respectively, the near-infrared light emitting unit 11a can enter 1 near-infrared light emitting unit light guide fiber 25A or a near-infrared light emitting unit light guide fiber bundle 25A composed of a plurality of near-infrared light emitting unit light guide fibers 25A, the visible light emitting unit 11B can enter 1 visible light emitting unit light guide fiber 25B or a visible light emitting unit light guide fiber bundle 25B composed of a plurality of visible light emitting unit light guide fibers 25B, the polarizer group 24 is composed of two or more exit polarizers 241 and entrance polarizers 242 with different polarization directions, the polarizer group 24 is formed by splicing or separating, and the photosensitive element 12 is moved in the optical axis OA direction of the imaging lens group manually or automatically to perform focusing.

As described above, in the handheld fundus camera with an illumination light source introduced by an optical fiber, the plurality of near-infrared light emitting units 11a are first turned on, the illumination light source L1 is introduced into the ophthalmoscope optical assembly 2 through the plurality of near-infrared light emitting unit optical fibers 25a, and is made linearly polarized light by the exit polarizer 241 on the side close to the second lens group 22 so as to deviate from the optical axis OA, and is made incident on the first lens group 21, and is then irradiated to the fundus 36 of the eye 3 after sequentially passing through the first lens group 21, the cornea 31, the aqueous humor 32, the pupil 33, the crystalline lens 34, and the vitreous body 35, and the near-infrared illumination light source L1 converged on the fundus 36 becomes the diffuse reflection light source L2 and becomes partially depolarized light, and then is made incident on the polarizer 242 after sequentially passing through the vitreous body 35, the crystalline lens 34, the pupil 33, the aqueous humor 32, the cornea 31, and the first lens group 21, and only the completely depolarized light or the partially depolarized light can, then, the light passes through the second lens group 22 and the third lens group 23 in sequence, and finally reaches the light sensing element 12, so that most of stray light can be stopped outside the incident polarizer 242, thereby greatly improving the signal-to-noise ratio of the light sensing element 12, when the light sensing element 121 acquires an image from the fundus 36, which may be unclear, and the light sensing element 12 can be manually or automatically focused until a relatively clear image is obtained, the visible light emitting unit 11b is immediately started, the visible LED light guide fiber 25b closely attached to the visible light emitting unit 11b guides the illumination light source L1 into the ophthalmoscope optical assembly 2, the visible illumination light source L1 converged to the fundus 36 becomes a diffuse reflection light source L2 close to one side of the second lens group 22 and passes through the first lens group 21, the cornea 31, the aqueous humor 32, the pupil 33, the crystalline lens 34 and the vitreous body 35 in sequence, and finally reaches the fundus 36 of the eye 3, the partially depolarized light then sequentially passes through the glass body 35, the lens 34, the pupil 33, the aqueous humor 32, the cornea 31 and the first lens group 21, and then enters the incident polarizer 242, and only the completely depolarized light can pass through the incident polarizer 242, and then sequentially passes through the second lens group 22 and the third lens group 23, and finally reaches the photosensitive element 12 to form the required image information, so that most of the stray light can be blocked outside the incident polarizer 242, and thus the signal-to-noise ratio of the photosensitive element 12 is greatly improved, in this embodiment, the plurality of near-infrared light emitting units 11a and the plurality of visible light emitting units 11b can be one or more respectively, the arrangement mode can be the ring arrangement of fig. 4, fig. 5 and fig. 6, or the single-side arrangement of fig. 7, fig. 8 and fig. 9, but not limited thereto, the similar arrangement mode of entering the first lens group 21 at a position deviated from the optical axis OA is within the scope of the present invention, FIG. 10 is a 3D cross-sectional view of an fundus camera with another fiber arrangement according to an embodiment of the present invention, in which one light emitting unit is attached to 1 or more fibers, fig. 12 is a schematic diagram showing the arrangement of 1 near-infrared light-emitting unit 11a and 1 visible light-emitting unit 11b, or 1 or more near-infrared light-emitting units 11a and 1 or more visible light-emitting units 11b, FIG. 13 is a schematic diagram showing the arrangement of 1 near-infrared light-emitting unit light-guiding fiber bundle 25A and 1 visible light-emitting unit light-guiding fiber bundle 25B, wherein the near-infrared light-emitting unit light-guiding fiber bundle 25A and the visible light-emitting unit light-guiding fiber bundle 25B are respectively composed of at least 1 near-infrared light-emitting unit light-guiding fiber 25A and 1 visible light-emitting unit light-guiding fiber 25B, FIG. 14 shows one of the arrangements of the light-emitting units and the optical fiber bundles, in which one light-emitting unit is tightly attached to one optical fiber bundle.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a hand-held type eye ground camera of leading-in light source of optic fibre, includes fuselage optical assembly and ophthalmoscope optical assembly, and wherein fuselage optical assembly includes near infrared luminescence unit, visible light luminescence unit and photosensitive element, and ophthalmoscope optical assembly includes polarizing plate group, first lens group, second lens group, third lens and light guide fiber, and wherein the light guide fiber includes near infrared luminescence unit light guide fiber, visible light luminescence unit light guide fiber, its characterized in that: the near-infrared light-emitting unit light guide fiber is used for guiding light beams of the near-infrared light-emitting unit into an imaging lens group of a fundus camera lens, enabling the light beams to be linearly polarized after passing through an emergent polaroid in a mode of deviating from an optical axis and being incident into a first lens group, then sequentially passing through the first lens group, a cornea, aqueous humor, a pupil, a crystalline lens and a vitreous body and irradiating the fundus oculi of an eye, the visible light-emitting unit light guide fiber is used for guiding the light beams of the visible light-emitting unit into the imaging lens group of the fundus camera lens, the emergent end of the light beams deviates from the optical axis, the emergent light beams are emitted into the first lens group of the imaging lens group and finally enter the fundus oculi through the lens, a near-infrared illumination light source converged on the fundus oculi can be a diffuse reflection light source and become partially depolarized light, and then sequentially, The imaging lens group comprises a plurality of lens groups and is used for imaging fundus images to the photosensitive element, and the photosensitive element is used for acquiring images of the fundus.

2. The handheld fundus camera with an optical fiber leading-in illumination light source as claimed in claim 1, wherein: the near-infrared light emitting unit may be 1 or more LEDs or LDs, and the visible light emitting unit may be 1 or more LEDs or LDs.

3. The handheld fundus camera with an optical fiber leading-in illumination light source as claimed in claim 1, wherein: the near-infrared light-emitting unit light-guiding fiber or the visible light-emitting unit light-guiding fiber can be a fiber bundle consisting of 1 or more optical fibers, and the optical fiber can be a plastic optical fiber or a quartz optical fiber.

4. The handheld fundus camera with an optical fiber leading-in illumination light source as claimed in claim 1, wherein: the near-infrared light-emitting unit and the visible light-emitting unit are respectively and closely attached to the light-guiding fiber of the infrared light-emitting unit and the light-guiding fiber of the visible light-emitting unit, or light beams are respectively focused and incident into the light-guiding fiber of the near-infrared light-emitting unit and the light-guiding fiber of the visible light-emitting unit through the converging lens.

5. The handheld fundus camera with an optical fiber leading-in illumination light source as claimed in claim 1, wherein: the near-infrared light emitting unit can be incident to 1 near-infrared light emitting unit light guide fiber or a near-infrared light emitting unit light guide fiber bundle consisting of a plurality of near-infrared light emitting unit light guide fibers, and the visible light emitting unit can be incident to 1 visible light emitting unit light guide fiber or a visible light emitting unit light guide fiber bundle consisting of a plurality of visible light emitting unit light guide fibers.

6. The handheld fundus camera with an optical fiber leading-in illumination light source as claimed in claim 1, wherein: the polarizer group consists of two or more emergent polarizers and incident polarizers in different polarization directions, and can be spliced.

7. The handheld fundus camera with an optical fiber leading-in illumination light source as claimed in claim 1, wherein: the photosensitive element can be manually or automatically moved along the optical axis direction of the imaging lens group for focusing.

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