KR20190036261A - Fundus camera - Google Patents

Abstract

The present invention is capable of realizing a portable fundus camera with a very compact configuration such that a user can carry the same with one hand and acquire a fundus image of a subject, and realizing a non-mydriatic fundus camera with a very compact and portable configuration. The present invention is to provide a fundus camera capable of obtaining an image quality equal to or higher than that of the conventional fundus camera while greatly reducing the cost of a device by configuring the device compact and simple to operate.

Description

Fundus camera {FUNDUS CAMERA}

The present invention relates to a fundus camera, and more particularly, to a camera used for accurately recording the state of an eye fundus or a lesion as image data and tracking the progress of a disease, The present invention relates to an eye fundus camera which can be photographed with respect to the fundus state without being carried out, and which is portable.

Recently, as the aging of the population rapidly progresses, the prevalence of eye disease rapidly increases with the increase of the geriatric eye diseases such as cataract, glaucoma and macular degeneration and the increase of the diabetic population, and the interest in prevention and diagnosis of diabetic retinopathy The number of patients with blindness-induced eye diseases is rapidly increasing worldwide.

The four major retinal diseases that cause blindness can track and prevent or treat various ophthalmologic disease outbreaks and progresses with basic fundus examination by analyzing the images of the eye fundus.

However, since the conventional funduscopic camera, which is generally used, is very large and installed in a hospital, it is difficult to carry out early diagnosis and treatment of ophthalmic diseases through the fundus camera, In addition, the conventional funduscopic camera is a large-sized funduscopic camera and has a very complicated structure. If it is not an expert of the device, it is not easy to control the device and it is very expensive. Therefore, And thus it is impossible to properly receive the early diagnosis and treatment using the fundus camera.

Recently, there has been a need to construct a fundus camera compactly and to develop it in a portable form, and prior arts have been filed for a patent.

Conventional prior art documents include Japanese Patent Application No. 2003-89352, Japanese Patent Application No. 1996-307181, Korean Patent Application No. 10-2014-0175741, and Korean Patent Application No. 10-2015-0143891.

The fundus camera radiates light through the pupil of the eyeball and receives light reflected from the fundus to acquire an image. Particularly, the fundus camera of the non-ablation mode is a device for providing illumination A complicated optical configuration such as an illumination optical system, a photographing optical system for transmitting the light reflected from the fundus as imaging light, an index projection optical system for projecting an index for fixing the subject's gaze, and an observation optical system using infrared light, It is very difficult to actually implement the portable type eye-candy camera, and the control of the device is complicated and difficult as in the case of the conventional interfit type fundus camera.

Here, the non-acidic funduscopic camera is a device that can acquire the image of the fundus without administering the shunt agent to the eyeball separately, unlike the shunt method of transmitting light by forcibly expanding the pupil by administering the shunt agent to the eye of the subject As a matter of course, the configuration of the apparatus becomes more complicated and the control becomes more difficult than the shandong method.

The present invention can realize a portable fundus camera with a very compact structure such that a user can take a fundus image with a single hand and can acquire a fundus image of the subject, and it is possible to construct a portable fundus camera with a very compact portable type, The present invention is to provide an eye fundus camera capable of achieving an image quality equal to or higher than that of a conventional fundus camera while significantly reducing the cost of the apparatus by simplifying and simplifying operation and being extremely compact.

An eye fundus camera according to an embodiment of the present invention includes: a main lens barrel; An objective lens assembly coupled to the front end of the main barrel and configured to focus light reflected from the fundus into the main barrel; The illumination optical system, the observation optical system, the photographing optical system, and the aiming optical system are integrated into a single optical system assembly by irradiating light to the objective lens module and transmitting the light focused by the objective lens module. An integrated optical system assembly; And a light processing assembly coupled to a rear end of the main barrel and configured to process light transmitted from the integrated optical system assembly.

Preferably, the integrated optical system assembly further comprises: an optical lens barrel coupled to the rear end of the main barrel section; and a plurality of different optical lenses arranged at predetermined intervals on the optical lens barrel, And an objective lens module coupled to a front end of the optical lens barrel to selectively provide either infrared light or white light, or to provide both of the objective lens module and the objective lens module, And a light source-optical filter socket configured to receive the light focused from the lens module and filter the light before entering the optical lens module.

Preferably, the light source-optical filter socket further comprises: a socket housing coupled to the front end of the optical lens barrel; and a light source disposed in the socket housing and arranged to form the same optical axis as the optical axis of light passing through the optical lens module, And a dual light source unit provided adjacent to the optical filter unit of the socket housing and providing the infrared light and the white light to the objective lens module, respectively.

Preferably, the light processing assembly is provided at the rear end of the integrated optical system assembly so that the aiming light for fixing the eye to the eye is transmitted to the eye through the integrated optical system assembly, A beam splitter which is disposed on a rear side of the beam splitter and receives the imaging light to generate image data for the fundus oculi, An image sensor and an aiming light generator provided on a side of the beam splitter to generate the aiming beam to be transmitted to the beam splitter and to be transmitted to the eye through the integrated optical system assembly.

Also, preferably, the light processing assembly is provided at the rear end of the integrated optical system assembly, receives the imaging light as reflected light reflected from the fundus and transmitted through the integrated optical system assembly, and generates image data And a focusing adjuster for adjusting the focus of the image on the image sensor by operating the sensor so that the image sensor linearly moves in a direction parallel to the optical axis.

According to another aspect of the present invention, there is provided an eye fundus camera comprising: an objective lens module configured to face an eyeball and configured to focus light reflected from a fundus; An optical lens assembly including a plurality of different optical lenses for receiving light reflected from the objective lens module at a front end thereof and transmitting the light to a rear end thereof; And an objective lens module coupled to a front end of the optical lens assembly for selectively providing either infrared light or white light to the objective lens module or providing both of the infrared light and the white light to the objective lens module, A light source-optical filter socket configured to receive the light; And a light processing module for processing light transmitted from the optical lens assembly.

Preferably, the optical lens assembly further comprises: an optical lens barrel coupled to the rear end of the main barrel section; and a plurality of different optical lenses arranged at predetermined intervals on the optical barrel section, And an optical lens module for refracting and transmitting the light to the rear end of the optical lens barrel.

Preferably, the light source-light filter socket includes a socket housing coupled to a front end portion of the optical lens assembly, the socket housing having a first housing portion and a second housing portion, An optical filter unit arranged to form an optical axis identical to an optical axis of light passing through the optical lens assembly, a dual light source unit provided in the second housing unit of the socket housing and providing the infrared light and the white light to the objective lens module, And a control unit.

Also, preferably, the socket housing is formed to form a through hole through which light passes, and the first accommodation portion is formed at one side of the through hole, and the optical filter portion is provided in the first accommodation portion, And a polarizing filter and an AR filter for removing peripheral reflected light with respect to the passing light.

Preferably, the dual light source unit further comprises: a light source control unit provided in the second accommodation unit; and an infrared light source module provided on one side of the light source control unit and including at least one infrared light source for emitting infrared light; A white light source module provided on the other side of the light source control unit and including at least one white light source element for emitting white light; and a white light source module provided in a portion corresponding to the white light source module of the light source control unit, And a filter cover for filtering light from the light source.

Preferably, the filter cover includes an AR cover for preventing reflection of light generated by the white light source module to the surroundings, and a polarizing cover for polarizing light generated from the white light source module .

According to another aspect of the present invention, there is provided an eye fundus camera comprising: an optical lens including a plurality of different optical lenses for receiving reflected light reflected from a fundus and transmitting the light to an eyeball from a predetermined light source, Wherein the optical lens assembly is provided at a rear end of the optical lens assembly so that the aiming light for fixing the eye to the eye is transmitted to the eye through the optical lens assembly, A beam splitter for passing the imaging light as reflected light transmitted through the objective lens and separating the focused light from the imaging light; An image sensor provided at a rear side of the beam splitter to receive the imaging light and generate image data for the fundus; And an aiming light generator provided on a side of the beam splitter to generate the aiming beam and transmit it to the beam splitter to be transmitted to the eye through the optical lens assembly.

Also, preferably, the aiming beam generating portion includes an aiming beam portion provided on a side of the beam splitter to provide a beam of the aiming beam, and an aiming beam portion provided between the aiming beam portion and the side face of the beam splitter, And an etching mask which etches and transmits the light of the aiming light source to form the aiming light.

Preferably, the image sensor further includes a focusing adjuster for adjusting the focus of the image on the image sensor by operating the image sensor so as to linearly move in a direction parallel to the optical axis.

Preferably, the focusing control unit includes a sensor holder on which the image sensor is mounted, and a rotation operation unit rotatably coupled to the sensor holder, so that the rotation operation unit is rotated by the drive motor, So that focus adjustment of the image on the image sensor is performed.

Preferably, the apparatus further includes a user input unit for allowing the user to input or select predetermined data, and a control unit for controlling the operation of the focusing control unit. The control unit controls the operation of the focusing unit based on the diopter value of the eyeball input through the user input unit. Is configured to automatically control the focusing control unit so that the image sensor is positioned at a focal distance corresponding to the input diopter value.

According to another aspect of the present invention, there is provided a fundus camera comprising: a main body having a coupling groove formed at one side thereof; A main lens barrel portion having an optical configuration in which one end portion is coupled to an engagement groove of the main body and is optically connected to a component inside the main body; An eye protection cap provided at the other end of the main barrel to protect the subject's eyeball; And a display unit which is provided on an opposite surface of the main body to the coupling groove and is connected to a component inside the main body and displays an image according to optical information, wherein the optical configuration of the main lens barrel selectively transmits infrared light and white light, An optical lens assembly including a plurality of different optical lenses for simultaneously receiving reflected light reflected from the fundus and transmitting the light to the components inside the main body, And an image sensor for receiving imaging light reflected from the fundus and transmitted through the optical lens assembly to generate image data for the fundus, The provision of the infrared light and the white light by the light generating means is respectively controlled It said a controller for controlling image data for a fundus produced by the image sensor is to be output through the display unit.

Preferably, the main body includes a sensor holder in which the image sensor is installed, an operation groove formed in the sensor holder and rotatably coupled to the sensor holder, the operation groove being elongated in an oblique direction, A light processing main body portion coupled to the sensor holder so as to be positioned in the operation groove and having a rotary operation portion having an actuator body portion on one side thereof; And a grip portion provided with a fisher and a drive motor for providing a driving force to rotate the driver fisher.

Also, preferably, a component inside the main body is provided between the image sensor and the optical lens assembly so that the aiming light for fixing the eye to the eye is transmitted to the eye through the optical lens assembly, And a beam splitter for separating the imaging beam from the imaging beam by passing the imaging beam as reflected light transmitted through the optical lens assembly to the image sensor, and a beam splitter provided on a side of the beam splitter, And an aiming mask provided between the side faces of the aiming light source and the beam splitter to etch the aiming pattern so that the light of the aiming light source passes to form the aiming light .

Preferably, the optical lens assembly further comprises: an optical lens barrel coupled to a rear end of the main barrel section; and a plurality of different optical lenses arranged at predetermined intervals on the optical barrel section, Wherein the light generating means comprises a socket housing coupled to a front end of the optical lens assembly and having a first housing portion and a second housing portion, An optical filter unit provided in the receiving portion and arranged to form an optical axis identical to the optical axis of the light passing through the optical lens module; and an optical filter unit provided in the second housing unit of the socket housing, And is a light source-optical filter socket including a dual light source part.

The fundus camera according to the present invention can realize a portable fundus camera with a very compact structure such that a user can take a fundus image with a single hand and acquire a fundoscopic image with respect to the subject, It is possible to realize an image quality equal to or higher than that of the fundus camera while greatly reducing the cost of the apparatus.

1 is a rear perspective view of a fundus camera according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the fundus camera shown in FIG. 1; FIG.
3 is a front perspective view of the fundus camera shown in Fig. 1. Fig.
FIG. 4 is a side sectional view showing the inside of the main body of the fundus camera and the internal structure of the main barrel according to an embodiment of the present invention.
5 to 7 are views for explaining a specific configuration of the optical lens assembly and the light source-optical filter socket in the fundus camera shown in FIG.
8 is a block diagram showing a control system of a fundus camera according to an embodiment of the present invention.
FIGS. 9 and 10 are views for explaining the functional implementation and operation of the fundus camera shown in FIG.
11 is a view for explaining focus control by a focusing controller and a driving motor of a fundus camera according to an embodiment of the present invention.

The details of the fundus camera according to the present invention will be described with reference to the drawings.

First, an external configuration of a fundus camera according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG.

FIG. 1 is an exploded perspective view of a fundus camera according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a fundus camera shown in FIG. 1, FIG. 3 is an exploded perspective view of the fundus camera shown in FIG. It is a perspective view from the front.

1 to 3, an eye fundus camera FC according to an embodiment of the present invention includes a main body 100, a main barrel 200, an eye protection cap 302, and a display unit 700 And the main body 100 includes a light processing main body 101 and a handle 102 extending from the light processing main body 101, a support 103 and a base 104 .

1 and 3, an eye fundus camera according to an exemplary embodiment of the present invention may be detachably coupled to a cradle (RC) (104) is engaged with the charging terminal (40) while being engaged by the guide of the guide portion (30).

In this way, the fundus camera can be charged by being inserted in the cradle (RC), and can be used separately from the cradle (RC) or can be used in a state of being inserted in the cradle (RC).

Since the fundus camera according to an embodiment of the present invention includes the handle 102, the user can easily carry out fundus examination by holding the handle 102 and placing the eye protection cap 302 on the eye of the subject There is one feature in the configuration.

The optical configuration is integrated in the main barrel section 200 by simplifying the complicated configuration of the illumination optical system, the observation optical system, theamming optical system, and the photographing optical system constituting the conventional fundus camera, and the processing of the optical information is performed by the main body 100 And the display unit 700 is provided behind the main body 100 to easily perform fundus examination.

The MD in Fig. 1 shows a fine adjustment unit that allows the user to manually adjust the focal point.

2 and 3, an eye fundus camera according to an embodiment of the present invention includes a main body 100 having a coupling groove 107 formed at one side of a light processing main body 101 of the main body 100, And the components inside the main body 100 and the components inside the main body 200 are optically connected to each other by engaging the engaging portions 201 provided on the main body 100 with each other.

A plurality of engaging guide portions 108 and engaging guide grooves 202 are formed in the engaging portions 107 of the main body 100 and the engaging portions 201 of the main barrel portion 200, The engaging portion 108 of the main barrel 200 is engaged with the engaging groove 107 of the main body 100 so that the engaging portion 201 of the main barrel 200 can be accurately and easily engaged.

The user holds the grip 102 and adjusts the focus while the eye protection cap 302 is positioned on the subject's eye and then presses the shot button 105 provided on the grip 102 to adjust the focus of the eye fundus You can easily shoot images. The specific configuration and operation will be described later. In FIG. 2, reference numeral 300 at the end of the main barrel 200 refers to an objective lens assembly including an objective lens module, which will be described later.

The external configuration of the fundus camera according to one embodiment of the present invention as described above can be simply constructed by providing a complicated optical system integrally in the main barrel 200 and allowing complicated components for the light processing, 4 to 11, the internal configuration of the fundus camera according to an embodiment of the present invention will be described in detail.

First, referring to FIG. 4, an overall configuration of an internal configuration of a fundus camera according to an embodiment of the present invention will be described.

4 is a side sectional view showing the interior of the fundus camera and the internal structure of the main barrel according to an embodiment of the present invention.

As shown in FIG. 4, the main configuration of a fundus camera according to an embodiment of the present invention includes an objective lens assembly 300, an integrated optical system assembly 400, and a light processing assembly 600.

2 and 3, the objective lens assembly 300 and the integrated optical system assembly 400 are provided in the main lens barrel 200 The light processing assembly 600 and the driving motor 660 are provided in the body 100. The light processing assembly 600 is provided in the light processing body 101 and the driving motor 660 and the like are attached to the handle 660 . The display unit 700 provided at the rear end of the light processing main body 101 is not shown in FIG.

A specific configuration of the objective lens assembly 300, the integrated optical system assembly 400, and the light processing assembly 600 will be described with reference to FIG.

The fundus camera according to an exemplary embodiment of the present invention may include an objective lens assembly 300, an integrated optical system assembly 400, and a light processing assembly 600 horizontally coupled to each other, And is arranged to be arranged in a straight line.

The objective lens assembly 300 includes an objective lens holder 301 coupled to the front end of the main barrel 200 and a plurality of lenses 311 and 311 provided at predetermined intervals in the objective lens holder 301, 312, and 313. The objective lens module 310 includes an objective lens 310,

The light source unit for irradiating the infrared light or the white light to the objective lens module 310 of the objective lens assembly 300 is provided in the main barrel 200 and the reflected light reflected by the fundus of the eye is finally imaged The configuration of a complex optical system to be transmitted to the sensor is integrally configured within the main barrel section 200. [

The objective lens module 310 of the objective lens assembly 300 refracts the light provided from the light source unit inside the main barrel 200, that is, the dual light source unit 510 of the light source-optical filter socket 500 to be described later, To the pupil of the eye of the eye and to reach the entire fundus region through the pupil. The objective lens module 310 focuses the light reflected from the fundus and transmits the focused light to the integrated optical system assembly 400 inside the main barrel 200.

The integrated optical system assembly 400 integrates various complicated and various optical systems such as an illumination optical system, an observation optical system, a photographing optical system, an aiming optical system, and the like into a single optical system assembly.

Here, the illumination optical system refers to an optical configuration that allows white light (visible light) to be refracted to reach the fundus through the pupil of the eye, and the observation optical system can appropriately refract the infrared light to reach the eye fundus through the eye pupil And the optical system that allows the light reflected from the fundus to be appropriately refracted to reach the image sensor. The photographic optical system is an optical configuration in which the white light appropriately refracts the light reflected from the fundus to reach the image sensor , And the aiming optical system refers to an optical configuration that appropriately transmits the aiming light of a specific pattern to the eyeball that can fix the subject's gaze.

Conventionally, various optical systems as described above are provided separately or only some optical systems are integrated. Therefore, when the optical systems are all provided, the apparatus becomes complicated and the size of the apparatus becomes considerably large.

The fundus camera according to the present invention is characterized in that the various optical systems as described above are integrated to simplify the configuration of a single optical system assembly so that the size of the apparatus can be greatly miniaturized to realize a portable fundus camera.

The integrated optical system assembly 400 includes an optical lens module

4, the integrated optical system assembly 400 is constructed by combining the optical lens assembly 410 and the light source-optical filter socket 500, so that the configuration of various optical systems as described above can be realized by a single optical system Assembly and assembly.

4, the optical lens assembly 410 of the integrated optical system assembly 400 includes an optical lens barrel 401 coupled to the rear end of the main barrel section, and a plurality of different optical lenses And an optical lens module 412 that receives the light converged from the objective lens module 310 and refracts the light and transmits the light to the rear end of the optical lens barrel 401.

The light source-optical filter socket 500 is coupled to the front end of the optical lens barrel 401 to selectively provide either the infrared light or the white light to the objective lens module 310, (Light reflected from the fundus and passing through the objective lens module) from the objective lens module 310 and filter the light before entering the optical lens module 412.

The light source-light filter socket 500 is configured to provide various functions such as means for appropriately providing infrared light as one socket, means for appropriately providing white light, and filtering for light directed to the image sensor to be. That is, the light source-optical filter socket 500 may include a dual light source unit 510 having an infrared light source module 520 and a white light source module 530, and an optical filter unit 550.

In order to acquire an image of the fundus in the fundus camera, white light must reach the fundus and receive reflected light from the fundus. In order to perform the fundus examination in the non-ablative mode, it is necessary to transmit the infrared light to the fundus , A configuration in which white light is sent to the fundus and a configuration in which infrared light is sent to the fundus are all required, which makes the configuration of the apparatus more complicated. In the fundus camera according to the embodiment of the present invention, The optical filter socket 500 selectively provides the infrared light and the white light, or both, so that the apparatus can be configured in a very compact manner, and it is possible to perform the fundus examination in a non-oxidizing manner.

Specific configurations of the optical lens assembly 410 and the light source-optical filter socket 500 are shown in FIGS. 5 to 7, which will be described later.

2) of the main body 100 (see FIG. 2) is provided at the rear end of the integrated optical system assembly 400, that is, at the rear end of the optical lens assembly 410. [ As shown in FIG. 4, includes a beam splitter 610, an image sensor 630, and aged light generating units 621 and 622, and the like.

The light control assembly 600 operates to move the image sensor 630 linearly in a direction parallel to the optical axis so as to adjust the focus of the image on the image sensor (unspecified) And the like).

As described above, the image sensor 630, the aiming light generating units 621 and 622, the beam splitter 610, and the focusing adjusting unit are all configured as the light processing assembly 600 inside the main body 100 (see FIG. 2) It is possible to simplify the overall configuration and to simplify the configuration of the optical system.

4, the beam splitter 610 is provided at the rear end of the optical lens assembly 410 so that the aiming beam for fixing the eye to the eye is transmitted to the eye through the optical lens assembly 410 A function of separating the imaging light from the imaging light by passing the imaging light (light for forming an image in the image sensor, that is, imaging light) as reflected light reflected from the fundus and transmitted through the optical lens assembly 410, .

That is, the beam splitter 610 reflects the specific mode of the aiming beam to the optical lens module 412 and allows the infrared beam and the white beam to pass through the image sensor 630.

The image sensor 630 is disposed on the rear side of the beam splitter 610 and is configured to receive imaging light passing through the beam splitter 610 to generate image data for the fundus, It is preferable that the light guide plate 610 is provided on the side surface of the splitter 610.

4, the aiming light generating unit includes an aiming light source unit 621 provided on a side of the beam splitter 610 to provide a light source of aiming light, and a beam splitter 620, 610), and an etching mask 622 is formed to etch the etching pattern to form the aiming light while allowing the light of the aiming light source 621 to pass therethrough.

The focusing control unit operates to move the image sensor 630 in a direction parallel to the optical axis (the optical axis for the imaging light) (i.e., in the longitudinal direction of the main barrel) The sensor holder includes a rotation operation unit, and the rotation drive unit is configured to linearly move the sensor holder in a direction parallel to the optical axis while the drive motor 660 rotates, as will be described later .

As described above, the fundus camera according to an embodiment of the present invention includes the objective lens assembly 300, the integrated optical system assembly 400, and the light processing assembly 600 in a straight line with respect to the eye, And the path of the beam traveling toward the image sensor of the white light and the path of the aiming light) are formed on the same optical axis, thereby integrally implementing various optical configurations such as the illumination optical system, the observation optical system, the photographing optical system, and the Aamming optical system as the integrated optical system assembly 400 And a beam splitter 610 for light processing, an image sensor 630, an aging light generator, a focusing controller, and the like are provided on the rear end side of the integrated optical system assembly 400, so that a very compact portable Device.

In the fundus camera according to an embodiment of the present invention, it is preferable that a control unit for controlling various components as described above is provided inside the main body 100 (refer to FIG. 2) as a component of the light processing assembly. And the operation of acquiring the fundus image according to the control of each of the components through the operation will be described later with reference to FIG. 8 to FIG.

A specific configuration of the integrated optical system assembly 400 shown in FIG. 4 will be described with reference to FIGS. 5 to 7. FIG.

5 is an exploded perspective view showing a specific configuration of the optical lens assembly 410. FIG. 6 is an exploded perspective view showing the configuration of the optical lens assembly 410 and the light source-optical filter socket 500, 7 is an exploded perspective view showing a specific configuration of the light source-light filter socket 500 described above.

5, the optical lens assembly 410 provided at the rear end of the main barrel of the fundus camera according to an embodiment of the present invention includes optical lens assemblies 410, And a rear end cover 405 for fixing the optical lens module 412 to the inside of the optical lens barrel 401. The optical lens module 412 includes an optical lens module 412,

And a light transmission hole 403 is formed in the front end of the optical lens barrel 401 so that light can pass therethrough.

6, a light source-optical filter socket 500 may be provided at the front end of the optical lens barrel 401 where the optical transmission hole 403 is formed.

As shown in FIG. 6, the light source-optical filter socket 500 includes a socket housing 501, a dual light source unit 510 provided at one side of the socket housing 501, And the fixing bolt BT penetrates the mounting hole 502 formed in the side surface of the socket housing 501 and is fixed to the side surface of the optical lens barrel 401, The light source-optical filter socket 500 may be installed at the front end of the optical lens barrel 401 by being fastened to the optical lens barrel 404. It is of course possible to provide the light source-optical filter socket 500 at the front end of the optical lens barrel 401 by any other fastening method.

The dual light source unit 510 of the light source-optical filter socket 500 includes an infrared light source module 520 and a white light source module 530. An example of a specific configuration thereof is shown in FIG.

7, a through hole 505 is formed in the socket housing 501, and a first accommodating portion 506 is formed around the through hole 505. As shown in FIG. A second receiving portion 504 for forming a dual light source portion is formed on one side of the first receiving portion 506 of the socket housing 501.

6, the light transmission hole 403 at the front end of the optical lens barrel 401 is formed as shown in FIG. 7, as shown in FIG. 7, as the light source-optical filter socket 500 is coupled to the front end of the optical lens barrel 401, And communicates with the through hole 505 of the socket housing 501 as well.

The optical transmission hole 403 at the front end of the optical lens barrel 401 and the through hole 505 of the socket housing 501 are communicated with each other to be a path through which light is transmitted. The optical axis of the light passing through the optical filter unit 550 and the optical axis of the light passing through the optical lens module 412 coincide with each other as the transmission hole 403 is communicated with each other.

A polarizing filter 554 and an AR filter 556 may be provided in the first accommodating portion 506 to remove peripheral reflected light with respect to light passing through the through hole 505. Reference numeral 558 denotes a polarizing filter And a filter fixing portion 558 that fixes the filter 554 and the AR filter 556 in a state accommodated in the first accommodating portion 506. [

Since the AR filter 556 is an anti-reflection filter and the dual light source unit 510 is adjacent to the AR filter 556, the light provided from the dual light source unit 510 is directly reflected to the optical filter unit 550 And prevents a diffused reflection when light that is focused from the objective lens module 310 (see Fig. 4) enters.

The polarizing filter 554 filters out the wave of the light wave in one direction when the light focused from the objective lens module 310 (see FIG. 4) enters, And unnecessary reflected light that occurs).

That is, the polarizing filter 554 and the AR filter 556 are filters for further improving the quality of the image-forming light that enters the optical filter 550 and is transmitted to the optical lens module.

The light source control unit 512 is installed on the second housing 504 of the socket housing 501 by an adhesive member TP such as a double-sided tape. The light source control unit 512 may be implemented in the form of a circuit board on which predetermined components for controlling infrared light and white light are mounted.

As shown in FIG. 7, the light source control unit 512 includes at least one infrared light source module and an infrared light source module that emits infrared light according to the control of the light source control unit 512 And a white light source which emits a white light (visible light) according to the control of the light source control unit 512. The light source control unit 512 includes at least one white light source element which is spaced apart from the infrared light source module 520 by a predetermined distance, Module 530 is provided.

The light source control unit 512 controls the infrared light source module 520 and the white light source module 530 according to a control signal of a control unit for controlling the entire device to be described later to perform the light supply blocking and the like.

The white light source module 530 of the light source control unit 512 is connected to the second storage unit 504, and the white light source unit 504 is provided with the light source control unit 512, 7, the filter cover is configured to filter light emitted from the white light source module 530, and the filter cover is configured to filter light emitted from the white light source module 530, An AR cover 536 for preventing reflection to the periphery and a polarizing cover 534 for polarizing light generated from the white light source module 530. [

7, reference numeral 528 denotes a light source cover for housing the light source control unit 512, the polarizing cover 534, and the AR cover 536 in the second accommodating unit 504 and then covering and fixing them, The light source cover 528 covers the portion of the infrared light source module 520 while allowing the opening 529 to be located in the portion corresponding to the white light source module 530 (the white light source module 530 already has the filter covers 534, 536) covers the opening 529).

The combined structure of the optical lens assembly 410 and the light source-optical filter socket 500 as described above, that is, the integrated optical system assembly 400 is provided inside the main barrel unit 200, It is possible to effectively exhibit the optical characteristics necessary for realizing the function of the fundus camera.

8 to 10, a configuration of a control system of a fundus camera according to an embodiment of the present invention, an operation of the fundus camera through the apparatus, and an optical function implementation will be described.

FIG. 8 is a block diagram illustrating a control system of a fundus camera according to an embodiment of the present invention. FIG. 9 (a) is a block diagram of a control system of the fundus camera according to an embodiment of the present invention, FIG. 9B is a diagram illustrating the optical function of the fundus camera shown in FIG. 9A by simulating the progress of the light. FIG.

10 (a) is a view for explaining the principle of realizing the functions of the illumination optical system and the photographing optical system using the fundus camera according to Figs. 4 and 8. Fig. 10 (b) FIG. 4A is a diagram showing the optical function of the fundus camera shown in FIG.

8, a fundus camera according to an embodiment of the present invention includes a control unit 601 that implements the optical function of the fundus camera through the control of all the components, a light source control unit 512, an aiming light source unit 621, a driving motor 660, a data storage unit 602, an image sensor 630, an image processing unit 603, and a display unit 700.

The infrared light source module 520 and the white light source module 530 are connected to the light source control unit 512 and the infrared light source module 520 and the white light source module 530 are connected by the light source control unit 512 And the control of the light source control unit 512 is performed under the control of the control unit 601. [

The control unit 601 controls the aiming light source unit 621 to generate or turn off the aiming light and controls the driving motor 660 to control the focusing of the image sensor 630. [

The control unit 601 transmits data on the image formed by the image sensor 630 to the image processing unit 603 so that the image processing unit 603 can read the image generated by the image sensor 630 For adjusting the size of the image, adjusting the brightness of the image, and the like, so that the image data can be displayed on the display unit 700.

The control unit 601 transmits the funduscopic image processed by the image processing unit 603 to the display unit 700 so that the funduscopic image can be displayed for the user to view.

The control unit 601 stores the captured fundus image data in the data storage unit 602 and may transmit the fundus image data to a PC or a server connected to the network, if necessary.

The fundus camera according to an embodiment of the present invention having the above-described control system may be configured such that the objective lens assembly 300 is positioned at an appropriate position with respect to the eyeball EB as shown in FIG. 9 (a) (As shown in FIGS. 1 to 3), the objective lens assembly 300 can be properly positioned with respect to the eye EB by appropriately positioning the eye protection cap 302 around the eye of the subject The infrared light source module 520 controls the light source control unit 512 (see FIG. 8) of the dual light source unit 510 of the light source-optical filter socket 500 in order to prevent the pupil PL from shrinking, .

The infrared light Lr of the infrared light source module 520 is converged into the pupil PL of the eye EB through the objective lens module 310 to reach the fundus part of the eye EB, The optical distribution is shown in Fig. 9 (b).

Since the eyepiece EB of the subject moves when the eyes are not fixed, it is necessary to provide the eyeball EB with the aiming light La for stable funduscopic imaging. And the generated light passes through the aiming mask 622 and becomes an aiming light La having a predetermined pattern and is reflected by the beam splitter 610 to be incident on the optical lens module 410 of the optical lens assembly 410 412 and the optical filter unit 550 of the optical-air filter socket 500 and is transmitted through the objective lens module 310 to the eye EB.

As the subject looks at the specific pattern of the aiming light, the eye is fixed, the infrared light reaches the fundus (FD) through the pupil (PL), and the light reflected from the fundus (FD) And transmitted to the objective lens module 310. The transmitted light passes through the optical filter unit 550, the optical lens module 412 and the beam splitter 610 and arrives at the image sensor 630 to be imaged .

When the image is formed, the image of the fundus part by the infrared light is displayed on the display unit (not shown), and the user can adjust the resolution and focus of the funduscopic image while viewing the displayed image.

Since the infrared light is transmitted through the pupil (PL), it is possible to acquire a stable fundus image without reducing the pupil (PL) without administering a separate shading agent to the subject's eyeball As described above).

However, the image of the fundus (FD) portion by the infrared light is not suitable image data to be used as a basis of fundus examination. This is an image for the user to observe for resolution adjustment, focus adjustment, Is to acquire image data of a part of the image.

When the white light is transmitted through the pupil of the eyeball, the pupil is reduced, so the infrared light is transmitted through the pupil of the eyeball. In a very short time, the infrared light is blocked and the white light is transmitted through the pupil of the eyeball to the fundus. Should be obtained.

As shown in FIG. 9, in a state in which infrared light is transmitted to the fundus part (FD) through the pupil (PL) of the eyeball (EB) 10 (a) and 10 (b), the generation of infrared light by the infrared light source module 520 is instantaneously interrupted by the user by pressing the button 105, The white light source module 530 generates the white light Lw while the generation of the aiming light is blocked so that the image of the fundus part can be acquired before the pupil PL is reduced.

That is, when the user presses the shot button, the control unit 601 (see FIG. 8) controls the light source control unit 512 (see FIG. 8) so that the infrared light source module 520 The white light source module 530 is driven by the light source control unit to provide the white light Lw while turning off the infrared light and controlling the aiming light source unit 621 to turn off the generation of the aiming light.

The white light Lw of the white light source module 530 is converged into the pupil PL of the eye EB through the objective lens module 310 to reach the fundus part of the eye EB, The distribution is as shown in Fig. 10 (b).

The white light Lw arrives at the fundus FD through the pupil PL and the light reflected at the fundus FD is transmitted to the objective lens module 310 through the pupil PL again, Passes through the optical filter unit 550, the optical lens module 412 and the beam splitter 610 as image forming light Lf and arrives at the image sensor 630 to be imaged.

When the image is formed, the funduscopic image of the white light is displayed on the display unit (not shown) and is stored in the data storage unit, and may be transferred to another PC or server if necessary.

The structure and operation of the focusing control by the focusing controller and the driving motor will be described with reference to FIGS. 4 and 11. FIG.

4, the light processing assembly 600 may include a focusing adjuster to cause the image sensor 630 to move in a linear direction in a direction parallel to the optical axis so that the focus of the image on the image sensor 630 is adjusted I have explained.

The focusing controller may include a sensor holder 632 and a rotary actuator 650 as shown in FIGS. 11 (a) and 11 (b).

Fig. 11A is an exploded perspective view showing the configuration of the sensor holder, the rotary operation portion and the drive motor, and Fig. 11B is a view showing the operation of the sensor holder, the rotary operation portion, Fig.

11 (a) and 11 (b), an image sensor 630 is installed in the sensor holder 632, and the inner surface 652 of the rotation operation portion 650 is connected to the sensor holder 632, A plurality of operating grooves 654 are formed in the rotating operation portion 650 and are elongated in an oblique direction and a fastening hole h is formed in the sensor holder 632, The fixing protrusion fb may be fixed to the fixing hole h while being positioned in the actuating groove 654 while the rotary operation portion 650 is fitted in the fixing hole 632. [

When the rotation operation portion 650 is rotated with respect to the sensor holder 632 as described above, the fixing protrusion fb moves along the operation groove 654, The sensor holder 632 can be linearly moved.

At this time, an actuator unit 656 is formed at one side of the rotation operation unit 650 and a drive unit 662 engaged with the actuator unit 656 is provided at the drive shaft of the drive motor 660, When the motor 660 is driven to rotate the actuator unit 662, the actuator unit 656 engaged with the actuator unit 660 rotates the rotary actuator 650 so that the fixing protrusion fb moves along the actuator groove 654 The sensor holder 632 is operated to move the image sensor 630 in a straight line.

That is, the control unit 601 (see FIG. 8) controls the drive motor 660 to properly drive the image sensor 630, thereby moving the image plane of the image sensor 630 and thereby adjusting the focus.

The driving control of the driving motor 660 can be performed by a control according to a preset program by the control unit 601 and a control by the user (user using the fundus camera) finely adjusting manually (such fine adjustment The driving motor can be controlled manually by operating the fine adjustment unit MD provided on the rear surface of the handle 102 as shown in FIG.

As an example of the control according to the preset program by the control unit 601, the user may touch the examinee to find out the diopter value of the eye in advance and input the user's input unit Or may be constituted such that the display unit 700 is constituted by a touch panel so that the user may input predetermined information through a touch input to the display unit 700) The driving motor 660 can be controlled such that the image sensor 630 is positioned at a focal distance corresponding to the input diopter value.

As described above, the diopter value of the subject is inputted in advance, the image sensor is appropriately positioned in advance, and the fine focus adjustment is performed through the fine adjustment unit (MD), thereby making it easier to photograph the funduscopic image using the fundus camera And the effect of shortening the shooting time can be obtained.

As described above, the fundus camera according to the present invention is not only capable of realizing a funduscopic camera of a non-anamorphic type while constituting a very compact portable type, but also has various functions for obtaining a high quality fundus image And so on.

100: main body, 101: light processing main body part
102: handle portion, 105: shot button
200: main barrel, 300: objective lens assembly
310: objective lens module, 400: integrated optical system assembly
410: Optical lens assembly, 412: Optical lens module
500: light source-optical filter socket, 510: dual light source
520: infrared light source module, 530: white light source module
550: optical filter unit, 600: light processing assembly
610: beam splitter, 630: image sensor
632: sensor holder, 650: rotation operation part
660: drive motor, 601: control unit

Claims (20)

A main barrel;
An objective lens assembly coupled to the front end of the main barrel and configured to focus light reflected from the fundus into the main barrel;
The illumination optical system, the observation optical system, the photographing optical system, and the aiming optical system are integrated into a single optical system assembly by irradiating light to the objective lens module and transmitting the light focused by the objective lens module. An integrated optical system assembly; And
A light processing assembly coupled to a rear end of the main barrel and configured to process light transmitted from the integrated optical system assembly;
. 2. The integrated optical system assembly of claim 1,
An optical lens barrel coupled to a rear end of the main barrel,
A plurality of different optical lenses arranged at predetermined intervals on the optical lens barrel to refract the light focused from the objective lens module and transmit the light to the rear end of the optical lens barrel;
And an objective lens module coupled to the front end of the optical lens barrel to selectively provide either infrared light or white light to the objective lens module or to provide both of the infrared light and the white light, Wherein the optical filter comprises a light source-optical filter socket. The light source-optical filter socket according to claim 2,
A socket housing coupled to a front end of the optical lens barrel,
An optical filter unit disposed in the socket housing and arranged to form an optical axis identical to an optical axis of light passing through the optical lens module;
And a dual light source unit provided adjacent to the optical filter unit of the socket housing and providing the infrared light and the white light to the objective lens module, respectively. 2. The light source assembly of claim 1,
And an illumination optical system that is provided at a rear end of the integrated optical system assembly to transmit the aiming light for fixing the eye to the eye to the eye through the integrated optical system assembly, A beam splitter that separates the aiming beam and the imaging beam,
An image sensor provided on a rear side of the beam splitter to receive the imaging light and generate image data for the fundus,
And an aiming light generating unit provided on a side of the beam splitter to generate the aiming beam to be transmitted to the beam splitter and transmitted to the eye through the integrated optical system assembly. 2. The light source assembly of claim 1,
An image sensor which is provided at a rear end of the integrated optical system assembly and receives imaging light as reflection light reflected from the fundus and transmitted through the integrated optical system assembly to generate image data for the fundus,
And a focusing adjuster for adjusting the focus of the image on the image sensor by operating the image sensor so as to linearly move in a direction parallel to the optical axis. An objective lens module configured to confront the eyeball and focusing the light reflected from the fundus;
An optical lens assembly including a plurality of different optical lenses for receiving light reflected from the objective lens module at a front end thereof and transmitting the light to a rear end thereof;
And an objective lens module coupled to a front end of the optical lens assembly for selectively providing either infrared light or white light to the objective lens module or providing both of the infrared light and the white light to the objective lens module, A light source-optical filter socket configured to receive the light; And
A light processing module for processing light transmitted from the optical lens assembly;
. The optical lens assembly according to claim 6,
An optical lens barrel coupled to a rear end of the main barrel,
And an optical lens module disposed on the optical lens barrel and arranged to have a plurality of different optical lenses arranged at predetermined intervals to refract the light focused from the objective lens module and transmit the light to the rear end of the optical lens barrel. . The light source-optical filter socket according to claim 6,
A socket housing coupled to a front end of the optical lens assembly, the socket housing having a first housing portion and a second housing portion,
An optical filter unit disposed in the first housing portion of the socket housing and arranged to form an optical axis identical to an optical axis of light passing through the optical lens assembly,
And a dual light source unit provided in the second housing unit of the socket housing and providing the infrared light and the white light to the objective lens module, respectively. 9. The method of claim 8,
Wherein the socket housing is configured to form a through hole through which light passes and form the first accommodating portion on one side of the through hole,
The optical filter unit includes:
And a polarizing filter and an AR filter provided in the first accommodating portion to remove peripheral reflected light with respect to light passing through the through hole. The apparatus of claim 8, wherein the dual light source comprises:
A light source control unit provided in the second accommodating unit,
An infrared light source module provided on one side of the light source control unit and including at least one infrared light element for emitting infrared light;
A white light source module including at least one white light element disposed on the other side of the light source control unit and emitting white light;
And a filter cover provided at a portion of the second accommodating portion corresponding to the white light source module of the light source control unit for filtering light from the white light source module. 11. The filter according to claim 10,
An AR cover for preventing reflection of light generated by the white light source module to the periphery, and a polarizing cover for polarizing light generated from the white light source module. An optical fundus camera comprising: an optical lens assembly including a plurality of different optical lenses for receiving light reflected from a fundus to transmit light from a predetermined light source to the eyeball,
The optical lens assembly is provided at the rear end thereof so that the aiming light for fixing the eye to the eyeball is transmitted to the eye through the optical lens assembly, and the reflected light, which is reflected from the fundus and transmitted through the optical lens assembly, A beam splitter for separating the focusing beam from the focusing beam;
An image sensor provided at a rear side of the beam splitter to receive the imaging light and generate image data for the fundus; And
An aiming light generator provided on a side of the beam splitter to generate the aiming beam to be transmitted to the beam splitter and transmitted to the eye through the optical lens assembly;
. 13. The apparatus according to claim 12, wherein the aiming-
An aiming light source unit provided on a side of the beam splitter to provide a light source of the aiming beam;
And an aiming mask provided between the aamming light source and the side face of the beam splitter to etch the aiming pattern to form the aiming light while allowing light from the aiming light source to pass therethrough. 13. The method of claim 12,
Further comprising a focusing adjuster for adjusting the focus of the image on the image sensor by operating the image sensor so as to linearly move in a direction parallel to the optical axis. 15. The image pickup apparatus according to claim 14,
A sensor holder in which the image sensor is installed, and a rotation operation portion rotatably coupled to the sensor holder,
And the sensor holder is moved in a direction parallel to the optical axis while the rotation operation unit is rotated by the drive motor so that focus adjustment of the image on the image sensor is performed. 15. The method of claim 14,
A user input unit allowing a user to input or select predetermined data;
And a control unit for controlling the operation of the focusing control unit,
Wherein the control unit is configured to automatically control the focusing unit to position the image sensor at a focal length corresponding to the input diopter value according to a diopter value of an eye input through the user input unit. A body forming an engaging groove on one side;
A main lens barrel portion having an optical configuration in which one end portion is coupled to an engagement groove of the main body and is optically connected to a component inside the main body;
An eye protection cap provided at the other end of the main barrel to protect the subject's eyeball; And
And a display unit provided on an opposite surface of the main body to the coupling groove and connected to a component inside the main body to display an image according to optical information,
The optical structure of the main barrel section is,
A plurality of different optics for selectively receiving or simultaneously providing infrared light and white light, and for refracting the light transmitted from the light generating means to the eyeball by reflecting light reflected from the fundus and transmitting the refracted light to a component inside the body, An optical lens assembly including a lens,
The component inside the main body,
An image sensor for receiving imaging light reflected from the fundus and transmitted through the optical lens assembly to generate image data for the fundus,
And a control unit for controlling the provision of the infrared light and the white light by the light generating unit according to a user's operation and controlling the image data on the fundus generated by the image sensor to be output through the display unit. 18. The apparatus of claim 17,
A sensor holder to which the image sensor is installed; and an operation groove coupled to the sensor holder in a rotatable manner and having an elongated working groove formed in an oblique direction, wherein a fixing protrusion provided on one side of the sensor holder is disposed in the operating groove, A light processing main body part coupled to the holder and provided with a rotation operation part having an actuator part on one side,
And a grip portion formed to extend from the light processing main body portion and having a drive unit for interlocking with the actuator unit and a drive motor for providing a driving force to rotate the actuator unit. 18. The device of claim 17,
Wherein the optical lens assembly is provided between the image sensor and the optical lens assembly so that the aiming light for fixing the eye to the eye is transmitted to the eye through the optical lens assembly and reflected light reflected from the fundus and transmitted through the optical lens assembly A beam splitter for passing the imaging light through the image sensor so as to separate the imaging light and the imaging light,
An aiming light source unit provided on a side of the beam splitter to provide a light source of the aiming beam;
And an aiming mask provided between the aamming light source and the side face of the beam splitter to etch the aiming pattern to form the aiming light while allowing light from the aiming light source to pass therethrough. 18. The method of claim 17,
The optical lens assembly includes:
And an optical lens module that is disposed at a predetermined distance from the optical lens barrel so as to refract light and transmit the light to the rear end of the optical lens barrel,
The light-
A socket housing coupled to a front end of the optical lens assembly, the socket housing having a first accommodating portion and a second accommodating portion, respectively; and a second accommodating portion provided in the first accommodating portion of the socket housing, And a dual light source unit provided in the second housing unit of the socket housing to provide the infrared light and the white light toward the eyeball, respectively, wherein the optical filter unit comprises: .

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