KR102263830B1 - Fundus image photography apparatus using auto focusing function - Google Patents

Abstract

The present invention relates to a fundus image photographing device using an auto focus function that allows a high-quality fundus image to be easily photographed by automatically focusing a pupil image wherein by controlling a photographing focusing adjustment part for which the pupil image photographed by a photographing part is controlled to automatically focus, the present invention has an effect of allowing the photographing part to photograph the best fundus image. The fundus image photographing device comprises: a main body; and a photographing member.

Description

Fundus imaging device using autofocus function {FUNDUS IMAGE PHOTOGRAPHY APPARATUS USING AUTO FOCUSING FUNCTION}

The present invention relates to an apparatus for photographing a fundus image using an autofocus function, and more particularly, to an apparatus for photographing a fundus image using an autofocus function to easily capture a high-quality fundus image by automatically focusing a pupil image. it's about

In general, devices used for diagnosing the eyes include an ophthalmoscope, an ophthalmoscope, a slit lamp, an intraocular pressure device, and a fundus imaging device. Among them, the fundus camera is configured to detect common eye diseases by observing the retina, and connect the retinal state to the image sensor to photograph, observe, record, or store.

These fundus imaging devices are mainly installed and used in hospitals, and examples include a slit lamp microscope, a fundus camera, and a meibomian line measuring device. It examines the anterior segment of the eye, the lens, the retina, and the inside of the eyelid for cataract, glaucoma, diabetes. It can diagnose eye diseases such as retinopathy, age-related macular degeneration, and obstructive meibomian gland dysfunction. Briefly describing the fundus imaging method using this fundus imaging machine, the subject is positioned in front of the fundus imaging device, the distance between the imaging device and the cornea and the pupil are aligned, and then the distance to the cornea and the alignment with the pupil are maintained. while observing the retina, adjusting the focus on the retina, and then taking a picture of the retina.

However, the conventional fundus photographing apparatus includes an illumination optical system that provides illumination, an imaging optical system that transmits light reflected from the fundus as imaging light, a surface projection optical system that projects an index for fixing the subject's gaze, and an observation optical system using infrared light. There is a problem in that only a skilled expert of the device can take a high-quality fundus image because it has to be provided with the etc., and various complex electronic components related thereto. In addition, in the case of many subjects, since they do not go to a specialized ophthalmologist before the disease worsens, there is a problem that often misses an important opportunity for early treatment.

Domestic Registered Patent Publication No. 10-1992016 Drama Registration Patent Publication No. 10-1817037

It is an object of the present invention to solve the problems of the prior art as described above to provide an apparatus for photographing an fundus image using an autofocus function that allows a pupil image to be automatically focused to easily take a high-quality fundus image. .

In order to achieve the above object, the present invention provides a body having a housing; and a photographing member positioned on one side inside the housing, wherein the photographing member includes: an optical body in which an optical passage is formed along an inner longitudinal direction; a first lens module located on the front inside of the optical path exposed to the outside of the housing and guiding the eyes of the subject; an internal light source part mounted on the inner rear side of the optical path and irradiating light in the direction of the subject's eyes; a photographing unit positioned on the other side of the housing to be spaced apart from the rear of the optical body and photographing a pupil image or fundus image of light reflected from the eye of the subject; a photographing focusing control unit for moving the shunyeong unit so that the separation distance between the rear of the optical body and the photographing unit is closer or farther away; and a control unit for controlling the photographing focusing control unit to adjust the focus of the pupil image received from the photographing unit, and controlling the photographing unit to photograph the fundus image when the focus on the pupil image is adjusted To provide a fundus image photographing apparatus using an auto-focus function.

In addition, the internal light source unit is configured to have a first light source mounted on one rear side of the optical passage and emitting an infrared light source and a second light source mounted on the other rear side of the optical passage and emitting a white light source, and the photographing unit In the process of photographing the pupil image, the control unit turns on the first light source to control the infrared light source to be irradiated in the direction of the subject's eyes, and in the process of the photographing unit photographing the fundus image, the control unit turns on the second light source Provided is a fundus imaging apparatus using an autofocus function, characterized in that the white light source is controlled to be irradiated in the direction of the eye of a subject.

In addition, the photographing focusing control unit includes a connection guide connected to the photographing unit, a movement guide formed on one side of the connection guide to be parallel to one side of the optical body, and fixed to one side of the inner side of the housing. A sliding guide portion for guiding the sliding movement of the movement guide portion, a rack gear formed along a longitudinal direction of one surface of the movement guide portion, a pinion gear meshing with the rack gear, and a thin pinion gear fixed to the other side of the inner side of the housing and a driving motor for rotating the rack, wherein when the driving motor rotates the pinion gear under the control of the control unit, the pinion gear rotates and linearly moves the rack gear, and the movement guide unit provides for linear motion of the rack gear. It provides a fundus image photographing apparatus using an autofocus function, characterized in that the connection guide part is moved in a straight line, and the photographing part is configured to adjust the separation distance from the rear of the optical body while moving along the connection guide part.

In addition, the control unit compares and analyzes the fundus image received from the photographing unit and pre-stored retinal-related disease data, reads the risk, and controls to output the reading result to the outside. A photographing device is provided.

In addition, the main body includes a base, a housing mounted on one side of the base, and a three-axis motor positioned between the base and the housing to move the housing in an X-axis, Y-axis or Z-axis, and The photographing member is mounted in front of the optical body positioned in front of the first lens module and further includes an external light source for irradiating an infrared light source in the direction of the examinee's eyes, The photographing unit captures the pupil image of the light reflected from the eye and transmits it to the control unit, and the control unit controls the three-axis motor so that the pupil image of the subject received from the photographing unit is located at a preset fixation point To provide a fundus image photographing apparatus using an auto-focus function, characterized in that the housing is moved.

In addition, after generating a binarized image obtained by binarizing the pupil image of the subject received from the photographing unit, the control unit extracts the coordinates of the contour point of the binarized image, and then controls the three-axis motor to control the coordinates of the contour point. It provides a fundus imaging apparatus using an autofocus function, characterized in that the housing is moved so that the fixed point is located in the center.

In addition, the external light source unit, autofocus, characterized in that it comprises a support portion formed in a ring shape having a diameter greater than that of the subject's eye, and a plurality of external light sources formed along the circumference of the support to face the subject's eye. Provided is a fundus imaging apparatus using a function.

In addition, the main body further includes an input unit that transmits an input signal to the control unit, and the internal light source unit is mounted on one rear side of the optical path and emits an infrared light source and the other rear side of the first light source and the optical path. It is mounted and configured to have a second light source emitting a white light source, and the control unit, upon receiving a first input signal from the input unit, performs a first focus adjustment mode to control the three-axis motor, and performs two Upon receiving the th input signal, a second focus adjustment mode for controlling the photographing focusing adjustment unit and a photographing mode for photographing the fundus image of the light reflected by the subject's eye are sequentially performed by the photographing unit, and the second focusing mode is, The control unit turns on the first light source to control the infrared light source to be irradiated in the direction of the subject's eyes, controls the photographing unit to photograph the pupil image of the light reflected by the subject's eye, and inputs the pupil image photographed by the photographing unit The received control unit is configured to control the photographing focusing adjustment unit so that the photographing unit is moved so that the pupil image is focused, and the photographing mode is, when the pupil image is focused, the control unit controls the first light source An autofocus function, characterized in that it is configured to control the white light source to be irradiated in the direction of the subject's eyes by turning on the second light source, and to control the photographing unit to photograph the fundus image of the light reflected by the subject's eye Provided is a fundus imaging apparatus using the

The present invention controls the photographing focusing control unit to automatically focus the pupil image photographed by the photographing unit, so that the photographing unit can photograph the best fundus image.

In addition, since the photographing focusing adjustment unit moves the photographing unit, not the lens module, there is an effect that the pupil image is precisely focused.

In addition, the present invention has the effect of early recognition of retinal-related diseases because non-specialists can easily take an image of the fundus of themselves or of those around them, and analyze retinal-related diseases using the captured fundus image.

In addition, since the present invention can easily take retina images even for non-specialists, it is not an ophthalmology hospital where an ophthalmologist resides, but general hospitals such as internal medicine and psychiatry, as well as public health centers, nursing homes, silver towns, welfare centers, community centers It has the effect of being used as an auxiliary device for medical examination based on non-face-to-face remote treatment.

1 is a diagram schematically illustrating an external appearance of a fundus image photographing apparatus using an auto-focus function according to a preferred embodiment of the present invention.
2 is a diagram schematically illustrating a photographing member of the fundus image photographing apparatus using an auto-focus function according to a preferred embodiment of the present invention.
3 is a view showing an external light source of the fundus image photographing apparatus using an auto-focus function according to a preferred embodiment of the present invention.
4 is a view for explaining a control means of the fundus image photographing apparatus using the auto-focus function according to a preferred embodiment of the present invention.
5 is a diagram illustrating a movement path of light irradiated by an external light source of the fundus imaging apparatus using an auto-focus function according to a preferred embodiment of the present invention.
6 is a diagram schematically illustrating a state in which a pupil image is positioned at a fixed point of an apparatus for capturing an fundus image using an auto-focus function according to a preferred embodiment of the present invention.
7 is a diagram illustrating a movement path of light irradiated by an external light source of the fundus image photographing apparatus using an auto-focus function according to a preferred embodiment of the present invention.
FIG. 8 is a diagram illustrating an algorithm in which a controller of a fundus image capturing apparatus using an autofocus function detects a pupil using a pupil image according to a preferred embodiment of the present invention.
9 is a diagram illustrating a movement path of light emitted by a first light source and a second light source of an apparatus for capturing an fundus image using an auto-focus function according to a preferred embodiment of the present invention.
10 is a diagram illustrating an algorithm for correcting the focus of the pupil image of the fundus imaging apparatus using the auto-focus function according to a preferred embodiment of the present invention.

Hereinafter, a fundus image photographing apparatus using an autofocus function according to a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a diagram schematically illustrating an external appearance of a fundus image photographing apparatus using an auto-focus function according to a preferred embodiment of the present invention.

Referring to Figure 1, the fundus image photographing apparatus using the auto-focus function according to a preferred embodiment of the present invention includes a body 100, a photographing member (200: illustrated in FIG. 2) and a control means (300: illustrated in FIG. 4). do. The main body 100 forms an external shape, and includes a base 110 that is seated on the ground, a desk, etc., a housing 120 that is located on the upper portion of the base 110 and has a space so that various parts are disposed therein, and the base; A three-axis motor 130 (shown in FIG. 4 ) positioned between the 110 and the housing 120 , the display unit 114 positioned above the housing 120 , the manipulation unit 113 , and the input unit 112 . includes A seating part 140 is provided on the front side of the base 110 so that the chin of the subject is seated.

The three-axis motor 130 may move the housing 120 in the three-axis direction, that is, the X-axis, the Y-axis, and the Z-axis in a state supported by the base 110 . Here, the Z axis refers to a front-back direction moving away from or closer to the receiving unit 140 with respect to the receiving unit 140 , the X axis refers to a vertical direction in the front-rear direction, that is, a left-right direction, and the Y axis refers to an up-and-down direction. Hereinafter, unless otherwise specified, the front or front or front end refers to a direction closer to the seating portion 140 , and the rear or rear or rear end refers to a direction away from the seating portion 140 .

The display unit 114 is composed of a conventional touch panel, LCD, etc. capable of outputting various images to the outside, and may be rotatably coupled to the rear side of the housing 120 . The display unit 114 may show a current progress image and an examiner interface UI screen for performing a function. In addition, the display unit 114 is designed to be rotated upward so that the examiner can easily operate it.

The input unit 112 allows the examiner to input various modes, for example, the examiner inputs the first focus adjustment mode, the second focus adjustment mode, and the photographing mode through the input unit 112 , and the input unit 112 inputs the input unit 112 . mode is transmitted to the control unit 302 (shown in FIG. 4). The manipulation unit 113 is operated by an examiner to manually control the 3-axis motor 130 , and may be composed of, for example, a joystick, a button, and the like. In addition, the display unit 114 may be located at the rear of the other side of the base 110 , and the manipulation unit 113 and the input unit 112 may be located at the front of the other side of the base 110 . On the other hand, in the present invention, it is natural that the positions of the display unit 114 , the operation unit 113 , and the input unit 112 are not particularly limited.

The photographing member 200 and the control means 300 are positioned inside the housing 120 and will be described later.

2 is a view schematically showing a photographing member of the fundus image photographing apparatus using an autofocus function according to a preferred embodiment of the present invention, and FIG. 3 is a fundus image photographing using an autofocus function according to a preferred embodiment of the present invention. It is a diagram showing the external light source of the device.

2 and 3, the photographing member 200 is provided inside the housing 120 to photograph the eye of the subject, and the optical body 210, the external light source unit 240, the inner body 220, the second 1 includes a lens module 230 , an inner body 220 , an internal light source unit 250 , a second lens module 232 , a third lens module 234 , a photographing unit 260 , and a photographing focusing adjustment unit 270 . do.

The optical body 210 is formed, for example, in a cylindrical shape. The front side of the optical body 210 is exposed to the outside through the front side of the housing 120 , and the eyes of the subject are positioned on the front side of the optical body 210 . And, the optical passage 212 is provided in the interior of the optical body 210 is long formed into an empty space so that light passes along the longitudinal direction. Both ends of the optical passage 212 are configured to be exposed to the outside through the front and rear sides of the optical body 210 . And the first lens module 230 is positioned on the front side of the optical passage 212 in the longitudinal direction, and the inner body 220 is positioned on the rear side of the optical passage 212 in the longitudinal direction.

The external light source unit 240 is mounted on the front side of the optical body 210 and is formed to face the eye of the subject along the circumference of the support 242 and the support 242 formed in a ring shape having a larger diameter than the eye of the subject. It includes a plurality of external light sources 244 that are. One or a plurality of external light sources 244 irradiate an infrared light source of about 900 nm in the direction of the eye of the subject, so that the pupil of the eye of the subject is photographed. Since the external light source unit 240 includes the support part 242 having a larger diameter than the subject's eye, the external light source 244 formed in the support part 242 can evenly light the entire eye of the subject, so that the photographing unit ( 260) has the effect of improving the sharpness of the image taken.

The first lens module 230 includes a plurality of objective lenses, and the objective lens is a conventional configuration for, for example, extending a light path, adjusting a size of light, or adjusting a focus. The first lens module 230 communicates with the outside of the housing 120 so that the eyes of the subject are guided to the first lens module 230 .

The inner body 220 is formed in a cylindrical shape smaller than the optical body 210, and the inner light source part 250 is mounted on the front side in the inner longitudinal direction, the second lens module 232 is mounted on the inner center, and the inner rear side. The third lens module 234 is mounted there.

The internal light source unit 250 is located in the inner body 220 of the optical passage 212 and irradiates light in the direction of the subject's eyes, and the first light source 252 is located on the front side and the other side of the inner body 220. and a second light source 254 . The first light source 252 is an illumination used when observing and tracking the eyeball, and irradiates an infrared light source of approximately 740 to 780 nm in the direction of the eye of the subject. When an infrared light source in a band of 740 to 780 nm is irradiated to the eye of the subject, the pupil of the subject is not enlarged, so that the pupil of the subject can be easily observed. The second light source 254 is an illumination used when photographing a fundus image, and irradiates a white light source in a band of approximately 450 to 780 nm in the direction of the eye of the subject. That is, a white light source is instantaneously emitted, visible light is incident on the fundus through the dilated pupil, and a fundus image is obtained from the light reflected from the fundus. The pupil image using the first light source 252 is not image data suitable as a basis for fundus examination, but it is an image for automatically adjusting the focus of the pupil. The fundus image using the second light source 254 is image data for fundus examination, and various fundus examinations are performed through it.

The second lens module 232 includes a plurality of correction lenses for transferring an image image to an image of a desired condition. The third lens module 234 is positioned at the rear of the second lens module 232 and forms an image.

The photographing unit 260 is located at the rear side of the inner body 220 so as to be spaced apart from the rear of the optical body 210 and is a camera that takes a pupil image or fundus image of light reflected from the eye of the subject, a near-infrared light source, an infrared light source and It may be configured of a charge coupled device (CCD) module or a complementary metal oxide semiconductor (CMOS) module capable of sensitively receiving a white light source, etc. The pupil image or fundus image photographed by the photographing unit 260 is described later. It is transmitted to the control unit 302, and the control unit 302 outputs the pupil image photographed by the photographing unit 260 to the display unit 114, so that the examiner can manually track and observe the position of the examinee's pupil from the outside. have.

The photographing focusing adjustment unit 270 moves the shunyeong unit so that the separation distance between the rear of the optical body 210 and the photographing unit 260 is closer or farther away, so as to obtain a more accurate and clear pupil image and fundus image. That is, a connection guide 272 connected to the photographing unit 260, a movement guide 274 formed in parallel with one side of the optical body 210 on one side of the connection guide 272, and the housing 120 ) of a sliding guide portion (not shown) formed in a rail shape for guiding the sliding movement of the movement guide portion 274 in a state fixed to one side of the inside, and a rack formed along the longitudinal direction of one surface of the movement guide portion 274 . It includes a gear 276, a pinion gear 278 meshing with the rack gear 276, and a driving motor 279 fixed to the other inner side of the housing 120 to rotate the singe pinion gear 278. And when the driving motor 279 rotates the pinion gear 278 under the control of the controller 302, the pinion gear 278 rotates to linearly move the rack gear 276, and the movement guide unit 274 rotates the rack gear. The connection guide 272 is moved in a straight line by the linear motion of 276, and the distance from the rear of the optical body 210 is adjusted while the photographing unit 260 is moved along the connection guide 272, The photographing unit 260 focuses the pupil image photographed.

4 is a view for explaining a control means of the fundus image photographing apparatus using the auto-focus function according to a preferred embodiment of the present invention.

Referring to FIG. 4 , the control unit 300 includes a storage unit 301 , a control unit 302 , a communication unit 303 , an external light source driving unit 304 , a first light source driving unit 305 , and a second light source driving unit 306 . , a first motor driving unit 307 and a second motor driving unit 308 .

The storage unit 301 stores various images captured by the photographing unit 260 as image files. The communication unit 303 transmits various data such as an image file received from the control unit 302 to an external terminal through wireless communication. Wireless communication may include, for example, normal short-distance wireless communication such as Bluetooth, NFC, WiFi, or the like, or normal long-distance wireless communication such as 3G, 4G, and 5G.

The external light source driving unit 304 drives the external light source 244 under the control of the control unit 302, and the first light source driving unit 305 drives the first light source 252 under the control of the control unit 302, The second light source driver 306 drives the second light source 254 under the control of the controller 302 . The first motor driving unit 307 drives the three-axis motor 130 under the control of the control unit 302 , and the second motor driving unit 308 drives the driving motor 279 under the control of the control unit 302 . .

When receiving the first input signal from the input unit 112, the control unit 302 performs the first focus adjustment mode to control the three-axis motor 130, and receives the second input signal from the input unit 112, shooting A second focus adjustment mode for controlling the focusing adjustment unit 270, a photographing mode for controlling the photographing unit 260 to photograph the fundus image, and outputting the fundus image received from the photographing unit 260 to the outside and analyzing the fundus image Then, the reading mode is sequentially performed to read the risk. Hereinafter, the first focusing mode, the second focusing mode, the photographing mode, and the reading mode will be described.

5 is a view showing a movement path of light irradiated by an external light source of the fundus image photographing apparatus using the auto-focus function according to a preferred embodiment of the present invention, and FIG. 6 is an auto-focus function according to a preferred embodiment of the present invention. It is a view schematically showing a state in which a pupil image is positioned at a fixed point of the fundus imaging device using, and FIG. 7 is a view of the light irradiated by an external light source of the fundus imaging device using an autofocus function according to a preferred embodiment of the present invention. It is a diagram showing a movement path.

1 to 7 , the control unit 302 sequentially performs a first focus adjustment mode, a second focus adjustment mode, a photographing mode, and a reading mode.

First, the first focusing mode is for adjusting the position of the pupil. First, after the subject's chin is seated on the seating unit 140 , the subject's eyes are positioned to face the first lens module 230 . In this state, the control unit 302 receives the first input signal from the input unit 112 . However, the controller 302 controls the external light source 244 to emit light in the direction of the subject's eyes, as shown in FIG. 5 . The number and positions at which the external light sources 244 emit light may be separately selected using the input unit 112 or the like. Then, after being reflected from the eye, the external light source 244 passes through the first lens module 230 , the second lens module 232 , and the third lens module 234 in order and is transmitted to the photographing unit 260 . The photographing unit 260 photographs the pupil of the eye transmitted to the third lens module 234 , and transmits the photographed pupil image to the control unit 302 . Then, the controller 302 transmits the pupil image to the display unit 114 and controls the examiner to view the pupil image. In this state, the controller 302 generates a binarized image obtained by binarizing the pupil image of the subject received from the photographing unit 260 using an algorithm for detecting the pupil, and then extracts the coordinates of the outline point of the binarized image. Thereafter, the control unit 302 controls the three-axis motor 130 to drive the first motor driving unit 307 so that a preset fixed point is located at the center of the coordinates of the contour point, thereby driving the three-axis motor 130 . ) to control the housing 120 to move. Then, as shown in FIG. 6 , the pupil image of the subject received from the photographing unit 260 is controlled to come to a preset fixation point P, that is, a reference position. The fixed point P may be configured in a conventional “+” shape. At this time, since the pupil image and the preset fixed point P are formed together on the external display unit 114 , the examiner can check whether the pupil image is properly aligned to be positioned at the fixed point P. The fixed point P is a fixed position that serves as a reference value for photographing.

FIG. 8 is a diagram illustrating an algorithm in which a controller of a fundus image capturing apparatus using an autofocus function detects a pupil using a pupil image according to a preferred embodiment of the present invention.

First, as shown in FIG. 8A , the pupil image received by the controller 302 is largely divided into a pupil, an iris, a sclera, and an eyelid. Infrared IR features of the detected area are extracted, and the iris area and the reflected light area are detected as an image image.

Then, the control unit 302 performs binarization of the pupil image received from the photographing unit 260 and the pre-stored comparison image by applying an automatic photographing library application algorithm method, as shown in FIG. 8(b). In this, the boundary value is found and binarized using the distribution of the histogram so that the variance between the two large areas in the histogram of the two images is maximized.

Next, the controller 302 applies the following boundary line tracking algorithm to obtain boundary line information from the binarized image. The binarized image is sequentially searched from top to bottom, from left to right, and when a pixel with boundary information is encountered, the coordinates are queued. After obtaining the initial starting coordinates, the process searches for the moving direction in the tracking direction, and queues pixel coordinates with boundary line information. By repeating this process, boundary line information is extracted from the binarized iris and pupil images.

If the entire boundary line between the iris and pupil does not appear due to the influence of eyelids, eyebrows, or light, to solve this problem, it is assumed that the iris and pupil are circles, and first, the coordinates of the outline point of the object are obtained from the binarized image. Figure 8 (c) shows the iris (Iris), Figure 8 (d) shows the optimization of the reflector of the location center of the applied coordinates.

Meanwhile, the controller 302 may determine the position of the pupil by a known “Daugman” method or “Haro” method. The "Daugman" method is a model-based technique, which models the eyes in a two-dimensional (2D) or three-dimensional (3D) form in advance and receives an input using an appropriate equipment according to each modeling form. And the position of the pupil is estimated according to the modeling method. The “Haro” method is an appearance-based technique, in which the controller 302 extracts features of the pupil or iris from the pupil image received from the photographing unit 260 and estimates the pupil position using the extracted features. When the external light source 244 is irradiated parallel to the pupil center axis of the eye at a distance from the detection target eye, the light is reflected from the retina. When the center of the pupil becomes bright, it can be applied to the pre-modeled eye to estimate the center of the pupil.

9 is a view showing a movement path of the light irradiated by the first light source and the second light source of the fundus imaging apparatus using the auto-focus function according to the preferred embodiment of the present invention, and FIG. 10 is the preferred embodiment of the present invention. It is a diagram illustrating an algorithm for correcting the focus of the pupil image of the fundus imaging apparatus using the autofocus function according to the present invention.

1 to 10 , the control unit 302 that has shifted the first focus control mode sequentially shifts the second focus control mode, the photographing mode, and the read mode.

The second focusing mode is for controlling the focus of the pupil image of the subject received from the photographing unit 260 to be precisely focused. First, the control unit 302 turns on the first light source 252 in the direction of the subject's eyes. The infrared light source is controlled to be irradiated, and the photographing unit 260 is controlled to photograph the pupil image of the light reflected by the eye of the subject. After that, the control unit 302 receiving the pupil image photographed by the photographing unit 260 controls the second motor driving unit 308 so that the driving motor 279 of the photographing focusing adjustment unit 270 has the maximum focus value. The photographing unit 260 is controlled to move in the front-rear direction as much as possible, so that the focus of the pupil image, that is, the focusing is adjusted. That is, if the focus of the pupil image of the subject received from the photographing unit 260 is controlled to be focused, the photographing unit 260 to be described later can photograph the best fundus image more accurately and clearly, so that the photographing unit 260 is the fundus image It is to control to accurately focus the pupil image in advance before shooting. As such, the present invention controls the photographing focusing adjustment unit 270 to automatically focus the pupil image, so that the photographing unit 260 can photograph the best fundus image.

On the other hand, if the focus of the pupil image is controlled by changing the position of the second lens module 232 rather than the photographing unit 260, the second lens module 232 is arbitrarily shaken, so the focus of the pupil image may be shaken. There may be problems with Since the present invention moves the photographing unit 260, there is an effect that the focus of the pupil image is precisely focused.

Subsequently, in the photographing mode, first, in a state in which the pupil image is controlled to be focused, the controller 302 controls the first light source driver 305 and the second light source driver 306 to turn off the first light source 252 . and the second light source 254 is controlled to be turned on for a short time. Then, the white light source of the second light source 254 is transmitted to the pupil of the examinee, and the pupil of the examinee is momentarily widened, and at this time, the fundus image, that is, the retina image from the light reflected back to the photographing unit 260 is captured by the photographing unit ( 260) to shoot.

Next, in the reading mode, first, the controller 302 acquiring the retina image stores the retina image in the storage unit 301 . Thereafter, the storage unit 301 reads the risk by comparing and analyzing the retinal image and the retinal-related disease data pre-stored in the storage unit 301 , and outputs the reading result to the outside. In this case, the control unit 302 may continuously develop the reading performance by repeatedly performing machine learning using a deep learning-based artificial intelligence technique. On the other hand, the control unit 302 may be configured to transmit a retinal image to an external company through the communication unit 303 to compare and analyze retinal-related disease data through the retinal image in the external company and inform the result.

As such, the present invention has the effect of early recognition of retinal-related diseases because non-specialists can easily take an image of the fundus of themselves or those around them, and analyze retinal-related diseases using the captured fundus image.

In addition, since the present invention can easily take retina images even for non-specialists, it is not an ophthalmology hospital where an ophthalmologist resides, but general hospitals such as internal medicine and psychiatry, as well as public health centers, nursing homes, silver towns, welfare centers, community centers It has the effect of being used as an auxiliary device for medical examination based on non-face-to-face remote treatment.

Although the present invention has been described in detail in the above embodiments, it is natural that the present invention is not limited thereto, and it is apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical spirit of the present invention. If it falls within the scope of the claims, the technical idea should also be regarded as belonging to the present invention.

100: body 110: base
112: input unit 113: operation unit
114: display unit 120: housing
130: 3-axis motor 140: seating part
200: shooting member
210: optical body 212: optical path
220: inner body 230: first lens module
232: second lens module 234: third lens module
240: external light source 242: support
244: external light source 250: internal light source unit
252: first light source 254: second light source
260: photographing unit 270: photographing focusing control unit
272: connection guide 274: movement guide
276: rack gear 278: pinion gear
279: drive motor
300: control means
301: storage unit 302: control unit
303: communication unit 304: external light source driving unit
305: first light source driving unit 306: second light source driving unit
307: first motor driving unit 308: second motor driving unit

Claims (8)

a body having a housing; and
Including a photographing member located on one side inside the housing,
The photographing member is:
an optical body in which an optical passage is formed along the inner longitudinal direction;
a first lens module located on the front inside of the optical path exposed to the outside of the housing and guiding the eyes of the subject;
an internal light source unit mounted on the inner rear side of the optical path and irradiating light in the direction of the subject's eyes;
a photographing unit positioned on the other side of the housing to be spaced apart from the rear of the optical body and photographing a pupil image or fundus image of light reflected from the eye of the subject;
a photographing focusing control unit for moving the photographing unit so that the separation distance between the rear of the optical body and the photographing unit is closer or farther away; and
A control unit for controlling the photographing focusing control unit to adjust the focus of the pupil image received from the photographing unit, and controlling the photographing unit to photograph the fundus image when the focus for the pupil image is adjusted,
The photographing focusing control unit includes a connection guide connected to the photographing unit, a movement guide formed on one side of the connection guide to be parallel to one side of the optical body, and the movement while being fixed to one side of the inner side of the housing. A sliding guide portion for guiding the sliding movement of the guide portion, a rack gear formed along a longitudinal direction of one surface of the movement guide portion, a pinion gear meshing with the rack gear, and a singe pinion gear fixed to the other inner side of the housing to rotate including a drive motor that makes
When the driving motor rotates the pinion gear under the control of the control unit, the pinion gear rotates to linearly move the rack gear, and the movement guide unit linearly moves the connection guide unit by the linear motion of the rack gear, Fundus image photographing apparatus using an autofocus function, characterized in that the photographing unit is configured to adjust the separation distance from the rear of the optical body while moving along the connection guide.
The method of claim 1,
The internal light source unit is mounted on one rear side of the optical passage and is configured to have a first light source emitting an infrared light source and a second light source mounted on the other rear side of the optical passage and emitting a white light source,
In the process of the photographing unit taking the pupil image, the control unit turns on the first light source to control the infrared light source to be irradiated in the direction of the subject's eyes,
In the process of the photographing unit photographing the fundus image, the control unit turns on the second light source to control the white light source to be irradiated in the direction of the subject's eyes.
delete The method of claim 1,
The control unit compares and analyzes the fundus image received from the photographing unit with pre-stored retinal-related disease data, reads the risk, and controls to output the reading result to the outside. .
a body having a housing; and
Including a photographing member located on one side inside the housing,
The photographing member is:
an optical body in which an optical passage is formed along the inner longitudinal direction;
a first lens module located on the front inside of the optical path exposed to the outside of the housing and guiding the eyes of the subject;
an internal light source unit mounted on the inner rear side of the optical path and irradiating light in the direction of the subject's eyes;
a photographing unit located on the other side inside the housing so as to be spaced apart from the rear of the optical body and photographing a pupil image or a fundus image of light reflected from the eye of the subject;
a photographing focusing control unit for moving the photographing unit so that the separation distance between the rear of the optical body and the photographing unit is closer or farther away; and
A control unit for controlling the photographing focusing control unit to adjust the focus of the pupil image received from the photographing unit, and controlling the photographing unit to photograph the fundus image when the focus for the pupil image is adjusted,
The body includes a base, a housing mounted on one side of the base, and a 3-axis motor positioned between the base and the housing to move the housing along the X-axis, Y-axis or Z-axis,
The photographing member further includes an external light source part mounted in front of the optical body positioned in front of the first lens module and irradiating an infrared light source in the direction of the subject's eyes,
The photographing unit captures the pupil image of the light reflected from the eye of the subject by the infrared ray irradiated by the external light source unit and transmits it to the control unit,
The control unit controls the three-axis motor to move the housing so that the pupil image of the subject received from the photographing unit is located at a preset fixed point (fixation point) fundus image photographing apparatus using an autofocus function, characterized in that .
6. The method of claim 5,
After generating a binarized image obtained by binarizing the pupil image of the subject received from the photographing unit, the control unit extracts the coordinates of the contour point of the binarized image, and then controls the three-axis motor to the center of the coordinates of the contour point. Fundus image photographing apparatus using an autofocus function, characterized in that the housing is moved so that the fixed point is located.
6. The method of claim 5,
The external light source unit includes a support formed in a ring shape having a diameter larger than that of the subject's eye, and a plurality of external light sources formed along the circumference of the support to face the subject's eyes. Fundus imaging device used.
6. The method of claim 5,
The main body further includes an input unit for transmitting an input signal to the control unit,
The internal light source unit is mounted on one rear side of the optical passage and is configured to have a first light source emitting an infrared light source and a second light source mounted on the other rear side of the optical passage and emitting a white light source,
When receiving a first input signal from the input unit, the control unit performs a first focusing mode to control the three-axis motor, and when receiving a second input signal from the input unit, controls the photographing focusing control unit 2 The focus adjustment mode and the photographing mode in which the photographing unit captures the fundus image of the light reflected by the eye of the subject are sequentially performed,
In the second focus adjustment mode, the control unit turns on the first light source to control the infrared light source to be irradiated in the direction of the subject's eyes, and controls the photographing unit to photograph the pupil image of the light reflected by the subject's eyes, The control unit receiving the pupil image photographed by the photographing unit is configured to control the photographing focusing adjustment unit so that the photographing unit is moved to control the focusing of the pupil image,
In the photographing mode, when the pupil image is focused, the control unit turns off the first light source and turns on the second light source to control the white light source to be irradiated in the direction of the subject's eyes, Fundus image photographing apparatus using an autofocus function, characterized in that it is configured to control the photographing unit to photograph the fundus image of light.

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