CN212521733U

CN212521733U - Fundus photographic lens and fundus photographic assembly based on smart phone and single-lens reflex camera

Info

Publication number: CN212521733U
Application number: CN202020475322.2U
Authority: CN
Inventors: 蔡国灵
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2021-02-12
Anticipated expiration: 2030-04-03

Abstract

The utility model discloses an fundus photography lens, which comprises an aspheric convex lens, wherein the diopter of the aspheric convex lens is +14D to +20D, the front surface is plated with a polarizing film or/and an antireflection film, and the convex lens is positioned at the front side of the photographed eye of a patient; the fundus photographing component comprises a camera mobile phone additional lens special for fundus photographing, a fixed mobile phone shell and the like. Adopt above-mentioned technical scheme, the utility model discloses divide into two parts on the whole, some is the eye ground photographic lens that is used for the patient to wear in front of the eye, uses intelligent camera phone and the improvement of the cell-phone auxiliary lens common on the market, such as telephoto lens or range lens, or use the single opposition machine, an additional polarizer before the camera lens, an additional light on the camera lens, can accomplish the eye ground formation of image and shoot under the natural pupil under medicine expanding pupil or dim light promptly, and the low price is fit for promoting.

Description

Fundus photographic lens and fundus photographic assembly based on smart phone and single-lens reflex camera

Technical Field

The utility model relates to a fundus photography lens, fundus photography component based on smart mobile phone and fundus photography component based on single opposition machine belong to fundus imaging technology field.

Background

The fundus refers to the posterior tissue within the eyeball, including the retina, choroid, and optic nerve, and is an important component of the human eye. The retina is an important component of the sensory organ of the eye, most lesions of which are derived from the fundus, and a large number of arteriovenous vessels are distributed in the fundus. The observation and analysis of the choroid and retina of the eyeground have important significance for the early diagnosis and prevention of a plurality of diseases of a human body. Diseases such as diabetes can be diagnosed and prevented at an early stage based on the symptoms of changes in the fundus oculi. The generation and development of fundus imaging technology play a great role in the field of ophthalmic theoretical research and clinical application. The medical internet of things refers to a platform that connects medical devices to each other using a network. The platform is connected with doctors, patients and medical equipment, and simultaneously combines various engineering technologies such as medical big data calculation, information mining, communication technology and the like. For the aging problem faced by China at present, the medical Internet of things becomes an effective means for solving the problem. Fundus images can be widely used for screening retinal diseases and for early diagnosis of various diseases such as diabetes. The adolescence of diseases and the lagging medical level in remote areas make the early discovery and treatment of medical platforms of the internet of things and diseases more important. Due to the development of mobile communication technology in recent years, the development of medical information industry is promoted by the upgrade of smart phones and the improvement of medical standards. The fundus camera consists of an imaging system and an illumination system. The imaging system functions to acquire an image of the retina from the patient and the illumination system is used to illuminate the fundus of the eye to obtain a sharp image. As shown in fig. 1, a fundus imaging optical path diagram of a typical smart phone, light from an LED point light source 101 is formed into parallel rays by a lens 102, then the parallel rays are redirected by a diffusion sheet 103, a first polarizing sheet 104, a reflective mirror 105 and a beam splitter 106 and enter a human eye 108 through an ophthalmic lens 107, and light reflected by a retina is imaged on a camera 111 of the smart phone 100 through the ophthalmic lens 107, the beam splitter 106, a second polarizing sheet 109 and a relay lens 110. In the whole optical system, specular reflection light is eliminated by two linear polarizers whose polarization directions are perpendicular to each other. Further, as disclosed in chinese patent document CN207613785U, a fundus imaging apparatus based on a mobile device of a similar principle is disclosed. The existing fundus imaging system is expensive, a corresponding smart phone is required to be equipped, and the cost is often tens of thousands of yuan, so that a plurality of patients cannot bear the system. In addition, the eyeground images are acquired through the smart phone, and for some patients with visual disorder, such as myopia patients, glasses need to be taken off during shooting, so that shooting and recording cannot be completed automatically.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims to provide an eyeground photographic lens, because the eyeground photographic assembly of smart mobile phone and based on single opposition machine's eyeground photographic assembly.

In order to achieve the above object, the utility model discloses a fundus photography lens, its characterized in that: the front surface of the aspheric convex lens is plated with a polarizing film or/and an antireflection film, and the convex lens is positioned on the front side of the photographed eye of a patient.

The fundus photographic lens comprises a lens clamp and is used for fixing the lens in a position 3 cm-5 cm in front of the lens of a patient wearing the glasses.

The eye ground photographic lens comprises a plurality of lens frames with different pupil distances, and the lens frames are provided with clamping grooves and used for fixing the positions of the aspheric convex lenses and 3 cm-5 cm in front of eyes of a patient.

The fundus photographing lens comprises a shading cylinder with the depth of 5 cm-8 cm and a head-mounted elastic metal fixing piece of the shading cylinder, and a lighting spotlight powered by a button type power supply battery is attached to the side of the shading cylinder.

An eyeground camera component based on a smart phone comprises the eyeground camera lens, a range-increasing lens or a telephoto lens with 3-5 times magnification, and a polarized lens connected to the surface in a rotating mode.

The clamping part is used for being fixed on the camera hole of the smart phone.

The mobile phone shell is characterized by further comprising a mobile phone shell clamping groove used for being fixed on the position of the camera hole of the smart phone and a reflector on the residual area.

The camera lens, the flash lamp and the screen of the smart phone are arranged on the same side and used for self-shooting, or the screen of the smart phone is arranged on the other side of the camera lens and the flash lamp and used for other shooting.

A fundus camera component based on a single lens reflex comprises the fundus camera lens, an illumination spotlight and a button type power supply battery, wherein the illumination spotlight is attached to and fixed on a telephoto lens; a rotary contact polarizer is added in front of the telephoto lens.

Adopt above-mentioned technical scheme, compared with the prior art, the utility model, following beneficial effect has:

1. the whole body is divided into two parts, one part is a shooting device, the other part is an eyeground photographing lens used for a patient to wear in front of eyes, a common smart phone and a common mobile phone auxiliary lens in the market can be used, such as a telephoto lens or a range-increasing lens, or a single lens reflex can be used, and then the single lens reflex is matched with an aspheric convex lens of the eyeground photographing lens for use, so that eyeground imaging and shooting can be completed, early detection and remote diagnosis (coupleable AI eyeground disease diagnosis) of eyeground diseases can be realized, the price is low, and the eyeground photographing device is suitable for popularization;

2. because the independent fundus photographing lens is arranged, besides the convex lens is arranged in front of the photographed eye of the patient, the correcting lens can be arranged in front of the other eye, so that the patient with vision disorder can be assisted to complete photographing by himself;

3. the fundus imaging lens can be a telephoto lens or a range-increasing lens, and the smart phone has a certain distance with the eyes of the patient during shooting so as to facilitate the observation of the patient through a mobile phone screen or an auxiliary reflector, so that the telephoto lens or the range-increasing lens is arranged to achieve a better shooting effect;

4. the lens, the flash lamp and the screen of the smart phone are arranged on the same side, for example, a double-sided screen mobile phone in the market is used, the rear camera has higher pixels, and the flash lamp is arranged beside the smart phone, so that a patient can conveniently observe the smart phone through the screen on the same side when a better shooting effect is realized, and self-shooting is finished;

5. set up first polarisation layer at eye ground imaging lens, set up second polarisation layer on convex lens, can effectively get rid of most external mixed and disorderly light through two polarisation layers to reach the shooting effect of preferred.

Drawings

Fig. 1 is a fundus imaging optical path diagram of a conventional smartphone in the prior art.

Fig. 2 is a schematic view of a fundus camera lens according to a first embodiment.

Fig. 3 is a schematic view of a fundus camera lens according to the second embodiment.

Fig. 4 is a schematic view of a first embodiment of the frame.

Fig. 5 is a schematic view of a second embodiment of the frame.

Fig. 6 is a schematic view of a third embodiment of the frame.

Fig. 7 is another angle view of fig. 6.

Fig. 8 is a schematic view of a fourth embodiment of the frame.

Fig. 9 is a schematic view of a fifth embodiment of the frame.

Fig. 10 is a schematic view of a sixth embodiment of the frame.

Fig. 11 is a schematic view of a head-mounted elastic metal fixture.

Fig. 12 is a schematic view of a fundus camera lens according to the third embodiment.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The utility model discloses a fundus camera component based on a smart phone, which comprises a fundus imaging lens 1 and a fundus camera lens 2 which are separately arranged; the fundus imaging lens 1 is used for being installed on the front side of a lens of a smart phone 100, the fundus photographing lens 2 comprises a head-mounted part and a lens 22, the lens 22 at least comprises a convex lens 221, and the head-mounted part is used for a patient to wear on the head so as to arrange the convex lens 221 on the front side of an eye part of the patient to be photographed. Through the structure, the fundus imaging system is integrally divided into two parts, one part is the fundus imaging lens 1 arranged on the smart phone 100, the other part is the fundus camera lens 2 used for a patient to wear in front of eyes, the fundus imaging lens 1 is installed on the smart phone 100 to serve as a mobile phone auxiliary lens during use, the patient wears the fundus camera lens 2, the convex lens 221 is located in front of the shot eyes, and the bottom of the eye is shot through the smart phone 100. The smartphone 100 may use a common smartphone 100, and meanwhile, the fundus imaging lens may also be a common auxiliary lens of a mobile phone in the market, such as a telephoto lens or a range-increasing lens, which is low in cost and suitable for popularization compared to the smartphone 100 fundus imaging system in the prior art.

The fundus camera lens 2 is provided for the purpose of providing the convex lens plate 221 in front of the eye portion of the patient to be photographed, and also for the purpose of providing the corrective lens 222 in front of the other eye of the patient, and when the patient has a visual disorder, it can be used for performing a visual correction on the other eye of the patient for observation, so that the patient who has the visual disorder can be assisted to complete the photographing by himself.

In addition, fundus imaging lens 1 includes first polarisation layer be provided with second polarisation layer on the convex lens piece 221, as the preferred mode of the utility model, first polarisation layer is the polarizer, and second polarisation layer is polarizing film. When the eye fundus imaging lens is used, a patient uses the flash lamp of the smart phone 100 to perform auxiliary lighting, emergent light of the flash lamp enters the eye of the patient after passing through the second polarizing layer, and enters the eye fundus imaging lens 1 through the first polarizing layer after being reflected, so that mixed and disorderly light is filtered, and a better shooting effect is achieved.

As shown in fig. 2, in the first embodiment of the fundus imaging lens 1, the fundus imaging lens 1 includes a lens body 11, a holding portion 12 fixed to the lens body 11, and a polarizer 13 mounted on the lens body 11, and the entire fundus imaging lens 1 can be fixed to the front side of the lens of the smart phone 100 through the holding portion 12, so that the lens body 11 serves as an auxiliary lens of the smart phone 100. The lens body 11 can be a telephoto lens or an extended range lens, and the smartphone 100 has a certain distance from the eyes of the patient during shooting so that the patient can observe the lens conveniently through a mobile phone screen or an auxiliary reflector, and therefore the telephoto lens or the extended range lens is arranged to achieve a better shooting effect.

As shown in fig. 3, in the second embodiment of the fundus imaging lens 1, the fundus imaging lens 1 includes a first engaging member 14 provided on a mobile phone casing 903 and a second engaging member 15 detachably fitted to the first engaging member 14, and the lens body 11 is fixed to the second engaging member 15.

The two modes of fixing the fundus imaging lens 1 on the smart phone 100 are simple in structure, convenient to install and free of using obstacles for users. Simultaneously, except above-mentioned two kinds of modes, can also fix fundus imaging lens 1 through other modes, as long as can realize the fixed to fundus imaging lens 1, all be in the utility model discloses an within the scope of protection.

The lens, the flash lamp 101 and the screen of the smart phone 100 are arranged on the same side, for example, a rear camera of a double-screen mobile phone (e.g., a double-screen mobile phone such as a knoop Z or vox) on the market has a higher pixel, and the flash lamp is arranged beside the smart phone, so that a patient can conveniently observe the smart phone through the screen on the same side when a better shooting effect is achieved, and self-shooting is completed, as shown in fig. 3, a window is arranged on the mobile phone shell 903 and used for exposing the rear screen 100 a.

The head-mounted part may be a frame 21. As shown in fig. 4, in the first embodiment, the fundus camera lens 2 includes a frame 21 and a lens 22 attached to the frame 21, and when a certain eye of a patient needs to take a fundus image, a convex lens 221 is attached to the frame 21 in front of the eye portion, a polarizing film 223 is provided on the convex lens 221, and when another eye of the patient has a visual impairment, a corrective lens 222 may be attached to the other eye.

As shown in fig. 5, in the second embodiment of the frame 21, the fundus camera lens 2 includes a frame 21, a lens 22, and a lens holder 23. In this embodiment, the lens holder 23 is held in the middle of the lens frame 21, the lenticular lens sheet 221 and the corrective lens sheet 222 may be held on both sides of the lens holder 23, and the polarizing film 223 may be provided on the lenticular lens sheet 221. When vision correction is not required, the corrective lenses 222 can be replaced with ordinary glass sheets.

As shown in fig. 6 and 7, in the third embodiment of the frame 21, the lens clips 23 may be provided in two, one of which is used for clipping and fixing the convex lens sheet 221 and the polarizing film 223, and the other is used for clipping and fixing the corrective lens 222 when the vision correction is required. In this structure, the lens clamp 23 for clamping and fixing the convex lens 221 can properly extend the length of the connecting rod, so that the distance from the convex lens 221 to the eye is greater than the focal length of the convex lens 221, thereby achieving the effect of reverse imaging. Meanwhile, a single lens clamp 23 can be selectively clamped on the left side or the right side, so that the patient can conveniently shoot two eyes.

As shown in fig. 8, in the fourth embodiment of the frame 21, the lens holder 23 is fixed to the frame 21, and the lens holder 23 can hold the lens 22.

As shown in fig. 9, in the fifth embodiment of the frame 21, the lens holder 23 may be configured as a double-holding structure, i.e., one side holds the frame 21 and the other side holds the lens 22.

As shown in fig. 10, in the sixth embodiment of the frame 21, the frame 21 is provided with an insertion groove 211 for inserting the lens 22, and the lens 22 is detachably inserted into the insertion groove 211. Further, the plurality of insertion grooves 211 are arranged along the direction away from the eyes of the patient, so that the distance from the eyes is different when the lenses 22 are inserted into different insertion grooves 211, when the lenses 22 are required to be far away from the glasses, the lenses can be inserted into the far insertion grooves 211, and otherwise, the lenses can be inserted into the near insertion grooves 211.

Of course, the present invention also includes other embodiments, for example, when the patient's vision does not need to be corrected, the frame 21 and the lenses 22 need to be equipped in a kit, when the patient's vision needs to be corrected and has self-contained glasses, the frame 21 can be the patient's self-contained glasses, and the fundus camera lens 2 is formed by clamping the convex lens sheet 221 on the glasses.

It is emphasized that the convex lens sheet of the present invention is an aspheric convex lens to avoid barrel distortion of the image. The diopter of the aspheric convex lens ranges from +14D to +20D, the front surface can be plated with a polarizing film or/and an antireflection film, and the aspheric convex lens is arranged at the position of 3-5cm in front of the eye of a patient through the head-wearing part.

The utility model provides a fundus camera lens can use with the fundus imaging lens is supporting, through installing fundus imaging lens and carrying out the eye ground on the smart mobile phone and shoot, fundus camera lens also can cooperate other devices of making video recording to use, for example single lens reflex. When used with other recording devices such as a telephoto single lens reflex camera, a separate lighting device may be provided to assist in illuminating the eye, such as a light pen, spotlight or spotlight and a button-type power supply battery for powering the light, and the auxiliary lighting device should be placed in close proximity to the lens of the telephoto single lens reflex camera to achieve near-to-coaxial illumination as possible. When shooting the fundus, the smart phone can be 1 chi to 1 meter distance away from the eyes of a patient, and when the single lens reflex camera is used, the distance can be more than 1 meter, so that the effect that auxiliary lighting is close to coaxiality is achieved.

As shown in fig. 11, the head-mounted part may also include a light-shielding tube 900 with a depth of 5cm to 8cm and a head-mounted elastic metal fixture 901, and a lighting spot lamp 902 powered by a button-type power supply battery 909 is attached near the light-shielding tube 900 and can be tightly clamped on the head of the patient. As shown in fig. 12, a reflective mirror 904 is disposed on at least a part of the back side of the mobile phone casing 903 of the smart phone, and the reflective mirror 904 may cover the remaining area of the card slot on the mobile phone casing 903. Emergent light of the illuminating spotlight 902 is reflected by the reflector 904 to illuminate the eyes of the patient, and the patient can use the other eye to observe the eye through the reflector, so that self-shooting is realized.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A fundus camera lens, comprising: the front surface of the aspheric convex lens is plated with a polarizing film or/and an antireflection film, and the convex lens is positioned on the front side of the photographed eye of a patient.

2. The fundus camera lens of claim 1, wherein: the fundus photographic lens comprises a lens clamp and is used for fixing the lens in a position 3 cm-5 cm in front of the lens of a patient wearing the glasses.

3. The fundus camera lens of claim 1, wherein: the eye ground photographic lens comprises a plurality of lens frames with different pupil distances, and the lens frames are provided with clamping grooves and used for fixing the positions of the aspheric convex lenses and 3 cm-5 cm in front of eyes of a patient.

4. The fundus camera lens of claim 1, wherein: the fundus photographing lens comprises a shading cylinder with the depth of 5 cm-8 cm and a head-mounted elastic metal fixing piece of the shading cylinder, and a lighting spotlight powered by a button type power supply battery is attached to the side of the shading cylinder.

5. The utility model provides an eye ground camera subassembly based on smart mobile phone which characterized in that: the fundus camera lens according to any one of claims 1 to 4, further comprising a 3 to 5 magnification range-increasing lens or telephoto lens, a surface-spin polarized lens.

6. A smartphone-based fundus camera assembly according to claim 5 and wherein: the smart phone camera also comprises a clamping part used for fixing the extended-range lens or the telephoto lens on the position of the camera hole of the smart phone.

7. A smartphone-based fundus camera assembly according to claim 5 and wherein: still include the cell-phone shell, lie in smart mobile phone camera hole position on the cell-phone shell and be provided with the draw-in groove and be used for installing increase range camera lens or telephoto lens, be provided with the reflector on the residual area of draw-in groove.

8. A smartphone-based fundus camera assembly according to claim 5 and wherein: the camera lens, the flash lamp and the screen of the smart phone are arranged on the same side and used for self-shooting, or the screen of the smart phone is arranged on the other side of the camera lens and the flash lamp and used for other shooting.

9. An eyeground photographic unit based on a single lens reflex camera, characterized in that: comprises the fundus camera lens of any one of claims 1-4, and further comprises an illumination spot lamp and a button-type power supply battery thereof, which are attached and fixed on the telephoto lens; a rotary contact polarizer is added in front of the telephoto lens.