JP2021049277A - Ophthalmologic apparatus, ophthalmologic apparatus control method, and program - Google Patents

Abstract

To present a fixation target which guides the orientation of an eye with a simple constitution.SOLUTION: An ophthalmologic apparatus comprises: an optical element (29A) whose portion activated by irradiation with UV light, the light-emitting portion serving as a fixation target for guiding the orientation of a subject eye; and an energy source (29B) which supplies UV light so that the portion of the optical element serving as the fixation target may be activated.SELECTED DRAWING: Figure 5

Description

The present invention relates to an ophthalmic apparatus, a control method and a program of the ophthalmic apparatus.

Patent Document 1 discloses an ophthalmologic imaging apparatus in which a plurality of light sources are provided as fixation targets and the fixation targets are presented according to the left and right eyes.
However, the optical system for presenting the fixation target was complicated.

U.S. Pat. No. 7,347,553

The first aspect of the technique of the present disclosure is
An optical element in which a portion activated by energy emits visible light, and the portion that emits visible light functions as a fixation target that guides the direction of the eye to be inspected.
An energy source that supplies energy so that the portion of the optical element that functions as the fixation target is activated.
It is an ophthalmic device equipped with.

A second aspect of the technique of the present disclosure is
A method of controlling an ophthalmic device executed by a processor.
In contrast to an optical element in which an energy-activated portion emits visible light and the portion that emits visible light functions as a fixation target that guides the direction of the eye to be inspected. It is a control method of an ophthalmic apparatus including supplying energy so that a portion functioning as a fixation target is activated.

A third aspect of the technique of the present disclosure is
A program that is stored in a storage medium and causes a processor to control an ophthalmic apparatus.
The processor
The energy-activated portion emits visible light, and the portion that emits visible light functions as a fixation target that guides the direction of the eye to be inspected. When supplying energy so that the part that functions as
It is a program that executes a process including controlling so that energy is supplied to the portion of the optical element that functions as the fixation target, based on the information input as the direction for guiding the eye to be inspected.

It is a block diagram which shows an example of an ophthalmic system. It is a schematic block diagram which shows an example of the whole structure of an ophthalmic apparatus. It is a block diagram which shows an example of the structure of the electric system of a server. It is a block diagram which shows an example of the function of a server. It is a conceptual diagram which shows an example of the schematic structure of a wide-angle optical system. It is a conceptual diagram which shows an example of the schematic structure of the fixation part. It is explanatory drawing which shows an example of the guidance to the optical path of the main optical axis about the direction of the eye to be examined. It is explanatory drawing which shows an example of the guidance in an arbitrary direction about the direction of an eye to be examined. It is a conceptual diagram which shows the structural example which can change the position of the fixation target which presents a fixation target. It is a conceptual block diagram of the 1st modification. It is a conceptual diagram which includes the light transmission state and the light characteristic in the 1st modification. It is a conceptual block diagram of the 2nd modification. It is a conceptual block diagram of the 3rd modification. It is a conceptual block diagram of the 4th modification. It is a conceptual block diagram of the 5th modification. It is a conceptual block diagram of the 6th modification. It is a block diagram which shows an example of the imaging function of an ophthalmic apparatus. It is a flowchart which shows an example of the flow of a shooting process. It is an image diagram which shows an example of the diagnostic screen of a viewer. It is explanatory drawing of the composite image generated from the fundus image. It is a conceptual diagram which shows the structural example of the 7th modification. It is a schematic diagram which shows the structure of the 1st application example. It is a schematic diagram which shows the structure of the 2nd application example. It is a schematic diagram which shows the structure of the 2nd application example.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The configuration of the ophthalmic system 100 will be described with reference to FIG. As shown in FIG. 1, the ophthalmology system 100 includes an ophthalmology device 110, a server device (hereinafter referred to as “server”) 140, and an image display device (hereinafter referred to as “viewer”) 150. The ophthalmic apparatus 110 acquires a fundus image. The server 140 stores a plurality of fundus images obtained by photographing the fundus of a plurality of patients by the ophthalmologic apparatus 110, corresponding to the IDs of the patients. The viewer 150 displays the fundus image acquired from the server 140.

The ophthalmic device is an example of the "ophthalmic device" of the technique of the present disclosure.

The ophthalmic apparatus 110, the server 140, and the viewer 150 are connected to each other via the network 130.

Next, the configuration of the ophthalmic apparatus 110 will be described with reference to FIG.
For convenience of explanation, the scanning laser ophthalmoscope is referred to as "SLO". In addition, an optical coherence tomography is referred to as "OCT".

When the ophthalmic apparatus 110 is installed on a horizontal plane, the horizontal direction is the "X direction" and the direction perpendicular to the horizontal plane is the "Y direction", connecting the center of the pupil of the anterior segment of the eye 12 to the center of the eyeball. The direction is "Z direction". Therefore, the X, Y, and Z directions are perpendicular to each other.

The ophthalmic apparatus 110 includes an imaging apparatus 14 and a control apparatus 16. The photographing device 14 includes an SLO unit 18, an OCT unit 20, and a photographing optical system 19, and acquires a fundus image of the fundus of the eye to be inspected 12. Hereinafter, the two-dimensional fundus image acquired by the SLO unit 18 is referred to as an SLO image. Further, a tomographic image (for example, an en-face image) of the fundus (for example, the retina) created based on the OCT data acquired by the OCT unit 20 is referred to as an OCT image.

The control device is an example of a "control unit" of the technology of the present disclosure.

The control device 16 includes a CPU (Central Processing Unit) 16A, a RAM (Random Access Memory) 16B, a ROM (Read-Only memory) 16C, and an input / output (I / O) port 16D, which are examples of processors. It is equipped with a computer with.

The control device 16 includes an input / display device 16E connected to the CPU 16A via the I / O port 16D. The input / display device 16E has a graphic user interface for displaying an image of the eye 12 to be inspected and receiving various instructions from the user. The graphic user interface includes a touch panel display.

Further, the control device 16 includes an image processing device 17 connected to the I / O port 16D. The image processing device 17 generates an image of the eye to be inspected 12 based on the data obtained by the photographing device 14. The control device 16 also includes a communication I / F 16F connected to the I / O port 16D, and is connected to the network 130 via the communication I / F 16F.

As described above, in FIG. 2, the control device 16 of the ophthalmic device 110 includes the input / display device 16E, but the technique of the present disclosure is not limited to this. For example, the control device 16 of the ophthalmic apparatus 110 may not include the input / display device 16E, but may include an input / display device that is physically independent of the ophthalmic apparatus 110. In this case, the display device includes an image processing unit that operates under the control of the CPU 16A of the control device 16. The image processing unit may display an SLO image or the like based on the image signal output instructed by the CPU 16A.

The photographing device 14 operates under the control of the CPU 16A of the control device 16. The photographing apparatus 14 includes an SLO unit 18, a photographing optical system 19, and an OCT unit 20. The photographing optical system 19 includes a first optical scanner 22, a second optical scanner 24, and a wide-angle optical system 30.

The first optical scanner 22 two-dimensionally scans the light emitted from the SLO unit 18 in the X direction and the Y direction. The second optical scanner 24 two-dimensionally scans the light emitted from the OCT unit 20 in the X direction and the Y direction. The first optical scanner 22 and the second optical scanner 24 may be any optical element capable of deflecting a luminous flux, and for example, a polygon mirror, a galvano mirror, or the like can be used. Moreover, it may be a combination thereof.

The wide-angle optical system 30 functions as a fixation target that guides the orientation (line-of-sight direction) of the compositing unit 26, the objective optical system 28, and the eye to be inspected 12 that synthesize the light from the SLO unit 18 and the light from the OCT unit 20. Includes fixation 29. Details of the wide-angle optical system 30 including the fixation unit 29 will be described later.

The objective optical system 28 may be a catadioptric system using a concave mirror such as an elliptical mirror, a catadioptric system using a wide-angle lens or the like, or a catadioptric system combining a concave mirror or a lens. By using a wide-angle optical system using an elliptical mirror, a wide-angle lens, or the like, it is possible to photograph the retina not only in the central part of the fundus but also in the peripheral part of the fundus.

When a system including an elliptical mirror is used, the system using the elliptical mirror described in International Publication WO2016 / 103484 or International Publication WO2016 / 103489 may be used. Each of the disclosures of WO2016 / 103484 and the disclosures of WO2016 / 103489 are incorporated herein by reference in their entirety.

The wide-angle optical system 30 enables observation in the fundus with a wide field of view (FOV: Field of View) 12A. The FOV 12A indicates a range that can be photographed by the photographing device 14. FOV12A can be expressed as a viewing angle. The viewing angle can be defined by an internal irradiation angle and an external irradiation angle in the present embodiment. The external irradiation angle is an irradiation angle in which the irradiation angle of the luminous flux emitted from the ophthalmic apparatus 110 to the eye 12 to be inspected is defined with reference to the pupil 27. The internal irradiation angle is an irradiation angle in which the irradiation angle of the luminous flux irradiated to the fundus of the eye is defined with reference to the center O of the eyeball. The external irradiation angle and the internal irradiation angle have a corresponding relationship. For example, when the external irradiation angle is 120 degrees, the internal irradiation angle corresponds to about 160 degrees. In this embodiment, the internal irradiation angle is 200 degrees. With such a wide-angle optical system 30, the viewing angle (FOV: Field of View) of the fundus is set to an ultra-wide angle, and the range of the fundus with an internal irradiation angle of 200 degrees can be photographed starting from the center of the eyeball. That is, it is possible to photograph a region beyond the equator from the posterior pole of the fundus of the eye 12 to be inspected.

Here, the SLO fundus image obtained by taking a picture with an internal irradiation angle of 160 degrees or more is referred to as a UWF-SLO fundus image. UWF is an abbreviation for UltraWide Field (ultra-wide-angle).

The SLO system is realized by the control device 16, the SLO unit 18, and the photographing optical system 19 shown in FIG. Since the SLO system includes a wide-angle optical system 30, it enables fundus photography with a wide FOV12A.

The SLO unit 18 includes a B (blue light) light source 40, a G light (green light) light source 42, an R light (red light) light source 44, and an IR light (infrared light (for example, near infrared light)) light source. It includes 46 and optical systems 48, 50, 52, 54, 56 that reflect or transmit light from light sources 40, 42, 44, 46 and guide them into one optical path. The optical systems 48, 50 and 56 are mirrors, and the optical systems 52 and 54 are beam splitters. B light is reflected by the optical system 48, is transmitted through the optical system 50, is reflected by the optical system 54, G light is reflected by the optical systems 50 and 54, and R light is transmitted through the optical systems 52 and 54. , IR light is reflected by the optical systems 56 and 52 and guided to one optical path, respectively.

The SLO unit 18 is configured to be able to switch a combination of a light source that emits laser light having different wavelengths or a light source that emits light, such as a mode that emits G light, R light, and B light, and a mode that emits infrared light. The example shown in FIG. 2 includes four light sources: a light source 40 for B light (blue light), a light source 42 for G light, a light source 44 for R light, and a light source 46 for IR light. Not limited to. For example, the SLO unit 18 may further include a light source for white light and emit light in various modes such as a mode in which only white light is emitted.

The light incident on the photographing optical system 19 from the SLO unit 18 is scanned in the X direction and the Y direction by the first optical scanner 22. The scanning light is applied to the back eye portion of the eye to be inspected 12 via the wide-angle optical system 30 and the pupil 27. The reflected light reflected by the fundus is incident on the SLO unit 18 via the wide-angle optical system 30 and the first optical scanner 22.

The SLO unit 18 is a beam splitter 64 that reflects B light and transmits other than B light among the light from the rear eye portion (for example, the fundus of the eye) of the eye 12 to be examined, and G of the light that has passed through the beam splitter 64. A beam splitter 58 that reflects light and transmits light other than G light is provided. The SLO unit 18 includes a beam splitter 60 that reflects R light and transmits other than R light among the light transmitted through the beam splitter 58. The SLO unit 18 includes a beam splitter 62 that reflects IR light among the light transmitted through the beam splitter 60. The SLO unit 18 detects the B light detection element 70 that detects the B light reflected by the beam splitter 64, the G light detection element 72 that detects the G light reflected by the beam splitter 58, and the R light reflected by the beam splitter 60. It includes an R light detection element 74 and an IR light detection element 76 that detects the IR light reflected by the beam splitter 62.

In the case of B light, the light incident on the SLO unit 18 via the wide-angle optical system 30 and the first optical scanner 22 (reflected light reflected by the fundus of the eye) is reflected by the beam splitter 64 and is reflected by the B light detection element 70. In the case of G light, it is transmitted through the beam splitter 64, reflected by the beam splitter 58, and received by the G light detection element 72. In the case of R light, the incident light passes through the beam splitters 64 and 58, is reflected by the beam splitter 60, and is received by the R light detection element 74. In the case of IR light, the incident light passes through the beam splitters 64, 58, and 60, is reflected by the beam splitter 62, and is received by the IR photodetector 76. The image processing device 17 operating under the control of the CPU 16A uses the signals detected by the B photodetector 70, the G photodetector 72, the R photodetector 74, and the IR photodetector 76 to produce a UWF-SLO image. Generate.

The UWF-SLO images include a UWF-SLO image (G color fundus image) obtained by photographing the fundus in G color and a UWF-SLO image (R color fundus image) obtained by photographing the fundus in R color. ). The UWF-SLO images include a UWF-SLO image (B color fundus image) obtained by photographing the fundus in B color and a UWF-SLO image (IR fundus image) obtained by photographing the fundus in IR. There is.

Further, the control device 16 controls the light sources 40, 42, and 44 so as to emit light at the same time. By simultaneously photographing the fundus of the eye 12 to be inspected with B light, G light, and R light, a G color fundus image, an R color fundus image, and a B color fundus image in which the positions correspond to each other can be obtained. An RGB color fundus image can be obtained from the G color fundus image, the R color fundus image, and the B color fundus image. The control device 16 controls the light sources 42 and 44 so as to emit light at the same time, and the fundus of the eye to be inspected 12 is simultaneously photographed by the G light and the R light. A fundus image can be obtained. An RG color fundus image can be obtained from the G color fundus image and the R color fundus image.

As described above, as the UWF-SLO image, specifically, there are a B color fundus image, a G color fundus image, an R color fundus image, an IR fundus image, an RGB color fundus image, and an RG color fundus image. Each image data of the UWF-SLO image is transmitted from the ophthalmologic device 110 to the server 140 via a communication IF (not shown) together with the patient information input via the input / display device 16E. Each image data of the UWF-SLO image and the patient information are stored in the storage device 254 correspondingly. The patient information includes, for example, the patient's ID, name, age, visual acuity, right eye / left eye distinction, axial length, and the like.

The OCT system is realized by the control device 16, the OCT unit 20, and the photographing optical system 19 shown in FIG. Since the OCT system includes the wide-angle optical system 30, it enables fundus photography with a wide FOV12A in the same manner as the above-mentioned SLO fundus image acquisition. The OCT unit 20 includes a light source 20A, a sensor (detection element) 20B, a first optical coupler 20C, a reference optical system 20D, a collimating lens 20E, and a second optical coupler 20F.

The light emitted from the light source 20A is branched by the first optical coupler 20C. One of the branched lights is made into parallel light by the collimated lens 20E as measurement light, and then is incident on the photographing optical system 19. The measurement light is scanned in the X and Y directions by the second optical scanner 24. The scanning light is applied to the fundus through the wide-angle optical system 30 and the pupil 27. The measurement light reflected by the fundus is incident on the OCT unit 20 via the wide-angle optical system 30 and the second optical scanner 24, and passes through the collimating lens 20E and the first optical coupler 20C to the second optical coupler 20F. Incident in.

The other light emitted from the light source 20A and branched by the first optical coupler 20C is incident on the reference optical system 20D as reference light, and is incident on the second optical coupler 20F via the reference optical system 20D. To do.

These lights incident on the second optical coupler 20F, that is, the measurement light reflected by the fundus and the reference light are interfered with by the second optical coupler 20F to generate interference light. The interference light is received by the sensor 20B. The image processing device 17 that operates under the control of the CPU 16A generates an OCT image such as a tomographic image or an en-face image based on the OCT data detected by the sensor 20B.

Here, an OCT fundus image obtained by taking an image at an internal irradiation angle of 160 degrees or more is referred to as a UWF-OCT image.

The image data of the UWF-OCT image is transmitted from the ophthalmologic apparatus 110 to the server 140 via a communication IF (not shown) together with the patient information. The image data of the UWF-OCT image and the patient information are stored in the storage device 254 in correspondence with each other.

In the present embodiment, the light source 20A exemplifies a wavelength sweep type SS-OCT (Swept-Source OCT), such as SD-OCT (Spectral-Domain OCT) and TD-OCT (Time-Domain OCT). It may be an OCT system of various types.

Next, the configuration of the electrical system of the server 140 will be described with reference to FIG. As shown in FIG. 3, the server 140 includes a computer main body 252. The computer body 252 has a CPU 262, a RAM 266, a ROM 264, and an input / output (I / O) port 268 connected to each other by a bus 270. A storage device 254, a display 256, a mouse 255M, a keyboard 255K, and a communication interface (I / F) 258 are connected to the input / output (I / O) port 268. The storage device 254 is composed of, for example, a non-volatile memory. The input / output (I / O) port 268 is connected to the network 130 via the communication interface (I / F) 258. Therefore, the server 140 can communicate with the ophthalmic apparatus 110 and the viewer 150. The storage device 254 stores a shooting processing program described later. The shooting processing program may be stored in the ROM 264.

The processing unit 208, which will be described later, of the server 140 stores each data received from the ophthalmic device 110 in the storage device 254.

Since the configuration of the electrical system of the viewer 150 is the same as the configuration of the electrical system of the server 140, the description thereof will be omitted.

Next, with reference to FIG. 4, the function realized by the CPU 262 of the server 140 executing the image processing program will be described. The image processing program includes a predetermined display control function, a predetermined image processing function, and a predetermined processing function for generating a display screen on the viewer 150. When the CPU 262 executes an image processing program having each of these functions, the CPU 262 functions as a display control unit 204, an image processing unit 206, and a processing unit 208, as shown in FIG.

Next, the configuration of the wide-angle optical system 30 including the fixation unit 29 will be described with reference to FIG. In the following, the light emitted from the SLO unit 18 and incident on the photographing optical system 19 is referred to as “SLO light”, and the light emitted from the OCT unit 20 and incident on the photographing optical system 19 is referred to as “OCT light”. In the present embodiment, the SLO light and the OCT light incident on the photographing optical system 19 are configured to be substantially parallel light.

FIG. 5 is a conceptual diagram showing an example of a schematic configuration of the wide-angle optical system 30 included in the photographing optical system 19. As shown in FIG. 5, the wide-angle optical system 30 functions as a fixation target that guides the orientation (line-of-sight direction) of the compositing unit 26 that synthesizes the SLO light and the OCT unit light, the objective optical system 28, and the eye 12 to be inspected. Includes fixation 29. In FIG. 5, the objective optical system 28 shows an optical system composed of a refraction optical system using a wide-angle lens or the like.

The objective optical system 28 is composed of a first lens group G1 on the 12 side of the eye to be inspected and a second lens group G2 on the synthesis unit 26 side. The objective optical system 28 has an optical path that passes through the synthesis unit 26, and emits SLO light and OCT light to the eye 12 to be inspected via the first lens group G1 and the second lens group G2.

In the present embodiment, a dichroic mirror having a wavelength dependence can be used as the synthesis unit 26, and the synthesis unit 26 sets the optical path of the SLO light toward the eye to be inspected and the optical path of the OCT toward the eye to be inspected. It has a function to synthesize. Further, the synthesis unit 26 separates the light path of the reflected light based on the SLO light and the optical path of the reflected light based on the OCT light for the light reflected by the eye 12 to be examined, and the synthesis unit 26 separates the light path of the reflected light based on the OCT light. It also has a function of guiding the reflected light based on the light to the SLO unit 18 and guiding the reflected light based on the OCT light to the OCT unit 20.

Further, the objective optical system 28 including the first lens group G1 and the second lens group G2 is an afocal optical system, and is covered with the position of the first optical scanner 22 (the position of the scanning center of the first optical scanner 22). It is configured to have a conjugate relationship with the position of the pupil 27 of the eye examination 12 (pupil position Pp). In the present specification, the “conjugate relationship” is not limited to a perfect conjugate relationship, but means a conjugate relationship including an error allowed in advance as a manufacturing error and an error due to a change with time. Further, in the present specification, the "afocal optical system" is not limited to a complete afocal optical system, and includes an error allowed in advance as a manufacturing error and an error due to aging. Means.

The outline of the operation of the photographing optical system 19 having the above configuration will be described. The parallel light SLO light or OCT light incident on the photographing optical system 19 is angularly scanned by a first optical scanner 22 such as a polygon mirror. The angle-scanned parallel light SLO light or OCT light passes through the compositing unit 26, the second lens group G2, and the first lens group G1 in order, and remains parallel light on the pupil surface of the eye 12 at a predetermined magnification. It is projected and angular scanning is performed with the pupil of the eye 12 to be inspected as the scanning center. This parallel light is focused by the eye 12 to be inspected, and the focused spot of the SLO light or the OCT light scans the fundus of the eye as the irradiation light in the fundus of the eye 12 to be inspected. The reflected light obtained by reflecting this irradiation light on the fundus passes through the pupil of the eye 12 to be inspected, passes through the first lens group G1, the second lens group G2, and the synthesis unit 26 in this order, and passes through the first optical scanner. It enters the SLO unit 18 or the OCT unit 20 via the 22 or the second optical scanner 24. The operation after each reflected light is incident on the SLO unit 18 or the OCT unit 20 is as described above.

A fixation unit 29 is arranged between the first lens group G1 and the second lens group G2 constituting the objective optical system 28. The fixation unit 29 has an energy source 29B and an optical element 29A that functions as a fixation lamp, and the position of the optical element 29A (fundus conjugate position Fcj) on the main optical axis AX of the objective optical system 28 and the eye to be inspected. It is configured to have a conjugate relationship with the positions of the fundus 12 (fundus position Fu). The energy source 29B is configured to supply energy to the optical element 29A. The optical element 29A is formed in a plate shape (for example, a flat plate shape), and the plate shape surface is configured to intersect (for example, orthogonal to) the main optical axis AX.

The optical element 29A is an example of the "optical element" of the technique of the present disclosure, and the energy source 29B is an example of the "energy source" of the technique of the present disclosure.

In the present embodiment, the optical element 29A is composed of fluorescent glass 290, and the energy source 29B is configured to supply energy to the fluorescent glass 290 by irradiating ultraviolet light (hereinafter referred to as UV light). As a result, the energy (UV light) from the energy source 29B is irradiated to the fluorescent glass 290 (optical element 29A), and in the fluorescent glass 290, the irradiated portion of the UV light emits fluorescence having a wavelength different from that of the UV light. That is, the energy irradiated from the energy source 29B is converted into fluorescence by the fluorescent glass 290.

The energy source 29B irradiates the fluorescent glass 290 with UV light from the outside of the main optical axis AX, that is, from an oblique direction with respect to the main optical axis AX so as not to obstruct the optical path in the objective optical system 28. It is composed of. The energy source 29B irradiates the fluorescent glass 290 with a luminous flux of UV light having a predetermined width. Further, the energy source 29B can change the irradiation position of the UV light on the fluorescent glass 290, and can change the irradiation direction of the UV light to irradiate the fluorescent glass 290. The control device 16 controls to change the irradiation direction of the UV light irradiating the fluorescent glass 290 (details will be described later).

FIG. 6 is a conceptual diagram showing an example of a schematic configuration of the fixation unit 29 configured so that the irradiation direction of UV light can be changed. As shown in FIG. 6, the fixation unit 29 has, as an energy source 29B, a mirror having a UV lamp 291 that irradiates UV light and a reflecting surface 292M that deflects UV light emitted from the UV lamp 291 by reflection. Includes the deflection element 292 of. The deflection element 292 is configured so that the reflection surface 292M can be rotated in the rotation direction Rm around the axis AXa intersecting the main optical axis AX, and the reflection surface 292M can be tilted in the inclination direction Rn with respect to the axis AXa. .. By rotating or inclining the reflecting surface 292M of the deflection element 292 in this way, the UV light from the UV ramp 291 is deflected by the deflection element 292 and is two-dimensional on the surface of the optical element 29A (fluorescent glass). The position can be changed to.

The deflection element 292 is an example of a "changed portion" of the technology of the present disclosure, and a UV lamp is an example of a "light source" of the technology of the present disclosure.

Specifically, as shown in FIG. 7, when UV light is irradiated to the intersection position of the fluorescent glass 290 and the main optical axis AX by the energy source 29B (UV ramp 291 and deflection element 292), the principal optical axis AX It emits fluorescent light on the optical path. The portion Arc emitted by this fluorescence serves as a fixation target, and the direction (line-of-sight direction) of the eye to be inspected 12 can be guided to the optical path of the main optical axis AX. The surface of the fluorescent glass 290 on the side to be inspected and the retina of the eye to be inspected 12 are in a conjugate relationship.
On the other hand, as shown in FIG. 8, when UV light is irradiated to an arbitrary position other than the intersection position between the fluorescent glass 290 and the main optical axis AX by the energy source 29B (UV ramp 291 and deflection element 292), the fluorescent glass 290 It emits fluorescence at any position above. The site Are where this fluorescence is emitted serves as a fixation target. By changing the emission position of fluorescence (that is, the position of the optical element 29A irradiated with UV light), the direction of the eye 12 to be inspected (line-of-sight direction) can be guided in an arbitrary direction.

The energy source 29B may be configured to irradiate UV light with a beam having a predetermined size (size of the light flux cross section) corresponding to the size on the fluorescent glass 290 that functions as a fixation target. Further, the technique of the present disclosure is not limited to the configuration of irradiating UV light by a beam, and the size is such that the fluorescent glass 290 functions as a fixation target using an imaging optical system using a UV lamp 291 as a point light source. It may be configured to form an image. That is, the UV light emitted from the energy source 29B to the fluorescent glass 290 may be formed to have a predetermined size that functions as a fixation target on the fluorescent glass 290.

Further, as described above, when UV light is irradiated toward the fluorescent glass 290 from an oblique direction with respect to the main optical axis AX, the size and shape of the light emitting region (light spot) depending on the irradiated position on the fluorescent glass 290 are determined. It is possible to consider. For example, by making the size and shape of the light emitting region (light spot) that functions as the fixation target regardless of the position on the fluorescent glass 290 the same, it is as if the common fixation target has moved in the eye 12 to be inspected. It is possible to recognize it. In this case, the size and shape of the light emitting region (light spot) that fluctuates according to the irradiation position on the fluorescent glass 290 are changed in advance, and the amount of fluctuation obtained in advance is the shape of the UV light according to the irradiation position. Should be adjusted. Further, the size and shape of the light emitting region (light spot) may be positively changed according to the irradiation position on the fluorescent glass 290.

In this way, by forming the fixation target by the fluorescence excited by the ultraviolet light from the outside on the fluorescent glass 290, the fixation target is presented as compared with the case where a plurality of light sources are provided as the fixation target and the fixation target is presented. It becomes possible to form an optical system for presenting an optotype with a simple configuration.

Further, even if the fluorescent glass 290 is inserted into the optical path of the objective optical system 28, the fluorescent glass 290 transmits visible light and light having an infrared wavelength. Therefore, a process using SLO light and a process using OCT light. Does not affect.

In the above-mentioned fixation unit 29, the energy source 29B is formed by the UV ramp 291 and the deflection element 292, and the irradiation position on the fluorescent glass 290 is changed by deflecting the propagation direction of the UV light toward the fluorescent glass 290. The position of the fixation target was changed (Fig. 7). However, the technique of the present disclosure is not limited to changing the irradiation position by the deflection of UV light by the deflection element 292. Here, with reference to FIG. 9, a configuration example in which the position of the fixation target that presents the fixation target can be changed without using the deflection element 292 will be described.

FIG. 9 is a conceptual diagram showing a configuration example in which the position of the fixation target can be changed to present the fixation target at different positions on the fluorescent glass 290. As shown in FIG. 9, the fixation unit 29X includes a UV ramp 291 and a reflecting member 292A that reflects UV light instead of the deflection element 292 as the energy source 29B. The UV ramp 291 is connected to a moving portion 299 that moves the UV ramp 291 in each direction orthogonal to the plane intersecting the axis after irradiation with UV light. By moving the UV ramp 291 in this way, the direction in which the UV light from the UV ramp 291 is directed toward the optical element 29A can be changed, and the position of the UV light applied to the optical element 29A can be changed.

It should be noted that the configuration for deflecting the UV light described above and the configuration for moving the UV ramp 291 may be combined.

By the way, it is not preferable that the UV light for exciting the fluorescence is applied to the eye 12 to be inspected. In the present embodiment, since the UV light is irradiated from the oblique direction to the fluorescent glass 290 with respect to the main light axis AX, the UV light is not guided in the direction along the main light axis AX and goes out of the main light axis AX. Be ejected. Therefore, it is possible to suppress the irradiation of the eye 12 to be inspected with UV light. Further, it is preferable that the light emitted to the eye 12 to be inspected positively removes or suppresses UV light including stray light caused by the configuration of the optical system.

Next, a modified example of suppressing the UV light directed to the eye 12 to be inspected will be described.
First, with reference to FIGS. 10 and 11, a first modification that suppresses UV light from the light emitted to the eye 12 to be inspected will be described.

FIG. 10 is a conceptual configuration diagram of the first modified example, and FIG. 11 is a conceptual diagram including a UV light transmission state and optical characteristics of the fluorescent glass in the first modified example. As shown in FIG. 10, in the first modification, as the fluorescent glass 290, fluorescent glass (UV non-transmissive fluorescent glass) 293 containing a material that does not transmit UV light is used. As shown in FIG. 11, in the UV opaque fluorescent glass 293, fluorescence is emitted at the site Ar by irradiation with UV light, and the UV light incident on the UV opaque fluorescent glass 293 is attenuated from the UV opaque fluorescent glass 293. UV light emission is suppressed. In this way, since the emission of UV light is suppressed by the UV opaque fluorescent glass 293, the UV light irradiated to the UV opaque fluorescent glass 293 is prevented from reaching the eye 12 to be inspected, or at least suppressed.

Fluorescent glass 290 is an example of a material containing a "visible light emitting portion" of the technique of the present disclosure, and UV opaque fluorescent glass 263 is an example of a material containing a "ultraviolet light limiting portion" of the technique of the present disclosure. ..

Next, a second modification will be described with reference to FIG. In the above-mentioned example, the case where the fluorescent glass 290 or the UV non-transmissive fluorescent glass 293 is used as the optical element 29A has been described, but the technique of the present disclosure is not limited to using the fluorescent glass.

FIG. 12 is a conceptual diagram including a UV light transmission state and optical characteristics when the optical element 29A is configured without using the fluorescent glass in the second modification. As shown in FIG. 12, in the second modification, a fluorescent film 294M that emits fluorescence by irradiation with UV light is formed on one surface of glass (UV cut glass) 294G containing a material that does not transmit UV light as a base material. The optical element 29A is composed of the fluorescent film UV cut glass 294. As shown in FIG. 12, in the fluorescent film UV cut glass 294, fluorescence is emitted at the site Ar in the fluorescent film 294M by irradiation with UV light, and the UV light incident on the fluorescent film UV cut glass 294 is attenuated by the UV cut glass 294G. And the emission of UV light is suppressed. In this way, without using fluorescent glass, the fluorescent film 294M emits fluorescence, and the UV cut glass 294 suppresses the emission of UV light.

The fluorescent film 294M is an example of the "visible light emitting portion" of the technique of the present disclosure, and the UV cut glass 294 is an example of a material containing the "ultraviolet light limiting portion" of the technique of the present disclosure.

Next, a third modification will be described with reference to FIG. In the second modification, the case where the UV cut glass 294G is used has been described, but the technique of the present disclosure is not limited to the use of the UV cut glass.

FIG. 13 is a conceptual diagram including a transmission state of UV light and optical characteristics when the optical element 29A is configured without using the UV cut glass in the third modification. As shown in FIG. 13, in the third modification, a UV cut film in which a fluorescent film 295M is formed on one surface of glass 295G, which is generally used as a base material, and UV light is cut (at least suppressed) on the other surface. The optical element 29A is composed of the fluorescent UV cut film glass 295 on which 295U is formed. As shown in FIG. 13, in the fluorescent UV cut film glass 295, fluorescence is emitted at the site Ar in the fluorescent film 295M by irradiation with UV light, and the UV light incident on the fluorescent film UV cut glass 294 is attenuated by the UV cut film 295U. And the emission of UV light is suppressed. In this way, without using the UV cut glass, the fluorescence film 295M emits fluorescence, and the UV cut film 295U suppresses the emission of UV light.

The fluorescent film 295M is an example of the "visible light emitting portion" of the technique of the present disclosure, and the UV cut film 295U is an example of the "ultraviolet light limiting portion" of the technique of the present disclosure.

Next, a fourth modification will be described with reference to FIG. In the third modification, the case where the optical element 29A having the UV cut film formed is used has been described, but the technique of the present disclosure does not limit the portion that suppresses UV light to the optical element 29A.

FIG. 14 is a conceptual diagram including a UV light transmission state and optical characteristics due to the peripheral configuration of the optical element 29A in the fourth modification. As shown in FIG. 14, in the fourth modification, the optical element 29A is composed of the fluorescent film glass 296 in which the fluorescent film 296M is formed on one surface of the glass 296G which is generally used as a base material. As shown in FIG. 14, in the fluorescent film glass 296, fluorescence is emitted at the site Ar in the fluorescent film 296M by irradiation with UV light, and is emitted from the fluorescent film glass 296. Further, in the fourth modification, a UV cut film 296U that cuts (at least suppresses) UV light is formed on the surface of the first lens group G1 on the side of the eye to be inspected 12 on the incident side of UV light. As a result, the UV light toward the eye 12 side to be inspected is attenuated by the UV cut film 296U, and the emission of UV light from the first lens group G1 is suppressed.

Next, a fifth modification will be described with reference to FIG. The UV light directed toward the eye 12 to be inspected may be cut or at least suppressed before reaching the eye 12 to be inspected. Therefore, the technique of the present disclosure does not limit the portion that suppresses UV light to the surface of the optical element 29A or the first lens group G1 on the incident side of UV light.

FIG. 15 is a conceptual diagram of a configuration for cutting or at least suppressing UV light in the fifth modification. As shown in FIG. 15, in the fifth modification, at least one member of the members between the optical element 29A provided on the optical path of the objective optical system 28 and irradiated with UV light and the eye 12 to be inspected is UV. It is formed so as to contain a material that does not transmit light, or a UV cut film that cuts (at least suppresses) UV light is formed on the surface of at least one of the members. Alternatively, it is combined with forming a material that does not transmit UV light and forming a UV cut film. As a result, the UV light is suppressed on the way toward the eye 12 side to be inspected.

Next, a sixth modification will be described with reference to FIG. As described above, the UV light directed toward the eye 12 to be inspected may be cut or at least suppressed before reaching the eye 12 to be inspected. Therefore, the technique of the present disclosure is not limited to suppressing UV light by the optical member included in the objective optical system 28.

FIG. 16 is a conceptual diagram of a configuration for cutting or at least suppressing UV light in the sixth modification. As shown in FIG. 16, in the sixth modification, a member that does not transmit UV light on the optical path between the optical element 29A irradiated with UV light in the objective optical system 28 and the eye 12 to be inspected, for example, a UV cut filter. Is an example of providing. In the example shown in FIG. 16, a UV cut filter 298 is provided on the optical path between the optical element 29A and the first lens group G1. As a result, the UV light is suppressed on the way toward the eye 12 side to be inspected.

The UV cut filter 298 is an example of a material containing the "ultraviolet light limiting portion" of the technique of the present disclosure.
According to the modification of FIGS. 11 to 16, it is possible to prevent the UV light from the UV light source from being irradiated to the eye 12 to be inspected, and it is possible to achieve the effect of increasing the safety of the ophthalmic apparatus.

Next, with reference to FIG. 17, the imaging function realized by the CPU 16A in the control device 16 of the ophthalmic apparatus 110 executing the imaging processing program will be described. The shooting processing program includes a shooting mode setting processing function, a shooting processing function (fixation target processing function, actual processing function), and an image processing control function. When the CPU 16A executes a shooting processing program having each of these functions, the CPU 16A has a shooting mode setting processing unit 162 and a shooting processing unit 164 (fixation target processing unit 164A, actual processing unit 164B) as shown in FIG. , And functions as an image processing control unit 166.
The photographing processing program is an example of a "program" of the technique of the present disclosure.

Next, with reference to FIG. 18, the imaging process (fixation control method in the ophthalmic apparatus 110) by the ophthalmic apparatus 110 will be described in detail. When the CPU 16A of the control device 16 in the ophthalmic apparatus 110 executes the imaging processing program, the imaging process shown in the flowchart of FIG. 18 is realized. The imaging processing program starts when the operator is instructed to start the imaging processing of the eye to be inspected 12 by operating the input / display device 16E of the ophthalmic apparatus 110.
The imaging process shown in the flowchart of FIG. 18 is an example of a process for realizing the "control method of the ophthalmic apparatus" of the technique of the present disclosure.

When the shooting processing program starts, in step S102, the shooting mode setting processing unit 162 sets the shooting mode obtained by detecting the operation of the input / display device 16E. The photographing mode indicates an imaging site and an imaging method of the eye 12 to be inspected. For example, an SLO photographing mode in which the back eye portion (for example, the fundus) of the eye to be inspected 12 is photographed by the SLO unit 18 and an OCT photographing mode in which the back eye portion of the eye to be inspected 12 is photographed by the OCT unit 20 can be mentioned. The photographing mode is not limited to the photographing mode for photographing the posterior eye portion of the eye to be inspected 12, and includes a photographing mode for photographing the anterior eye portion and a photographing mode for photographing the eye portion 12 to be examined. The shooting mode is set by the process of step S102.

In step S104, the fixation target processing unit 164A of the imaging processing unit 164 acquires the position of the fixation target predetermined for the set shooting mode from the table, thereby acquiring the position of the fixation target. To execute. The table is information in which the shooting mode and the position of the fixation target are associated with each other, and is stored in the ROM 16C in advance. The table may be acquired from an external device.

In step S106, the fixation target processing unit 164A controls to adjust the direction of the deflection element 292 so as to present the fixation target at the predetermined position acquired in step S104, and in step S108, the UV lamp 291 is turned on. .. As a result, the fixation target is presented at a predetermined position corresponding to the photographing mode, and the direction (line-of-sight direction) of the eye 12 to be inspected is guided.

In step S110, the actual processing unit 164B executes the shooting process in the shooting mode set in step S102.

In step S112, it is determined whether or not the process of presenting the fixation target and taking a picture is completed for each of the positions acquired in step S104.

In step S114, the fixation target processing unit 164A turns off the UV lamp. In the processing routine shown in FIG. 18, the UV lamp 291 is turned on before shooting, and the UV lamp 291 is turned off before shooting when the shooting is completed. The technique of the present disclosure is not limited to turning on the UV lamp 291 during photographing. For example, when the UV light from the UV lamp 291 affects the shooting, the UV lamp 291 may be turned off immediately before the shooting. Further, the lighting of the UV lamp 291 is not limited to the constant lighting, and includes a blinking state in which the UV lamp 291 is lit for a predetermined time and a state in which the UV lamp 291 is lit for a predetermined time is repeated.

In step S116, the image processing control unit 166 outputs image data. Specifically, the image data of the fundus image (for example, UWF-SLO image) obtained by photographing the fundus of the eye to be inspected 12 by the ophthalmologic apparatus 110 is transmitted from the ophthalmologic apparatus 110 to the server 140. That is, the image processing control unit 166 controls the image processing device 17, performs noise removal processing or the like from the image obtained by shooting, processes the image into a UWF-SLO image or a UWF-OCT image, and then sends the image to the server 140. Will be sent.

On the other hand, in the server 140, when the image data of the fundus image (for example, UWF-SLO image) in which the fundus of the eye to be inspected 12 is photographed by the ophthalmologic apparatus 110 is received from the ophthalmologic apparatus 110, the CPU 262 executes the image processing program. As a result, image processing is executed.

Specifically, the server 140 acquires the fundus image from the image data by the image processing control unit 206, performs predetermined image processing using the acquired fundus image, and obtains the processed image after the image processing. Generate. An example of a predetermined image processing is an image processing for generating a composite image (see FIGS. 19 and 20) in which a plurality of UWF-SLO images taken at fixed optotypes presented at different positions are combined.

For example, a composite image synthesized by using at least two of the fundus images IG1, IG2, and IG3 is generated. The fundus image IG1 is a UWF-SLO image taken by presenting a fixation target (see FIG. 7) at the fundus conjugate position Fcj on the main optical axis AX. The fundus images IG2 and IG3 are UWF-SLO images taken by presenting a fixation target (see FIG. 8) at the fundus conjugate position Fcj and at a position distant from the main optical axis AX. Specifically, the UWF-SLO image taken by presenting the fixation target at the fundus conjugate position Fcj above the main optical axis AX is referred to as the fundus image IG2, and the UWF-taken by presenting the fixation target below. Let the SLO image be the fundus image IG3.

The server 140 performs image processing such as pattern matching for matching blood vessel portions on the fundus images IG2 and IG3 with reference to the fundus image IG1, performs image processing for synthesizing the fundus images IG2 and IG3, and after the processing. Generate an image.

The processing unit 208, together with each of the fundus images, displays the processed image (composite image) together with the patient's information (patient ID, name, age, visual acuity, right eye / left eye distinction, axial length, etc.). It is stored in the storage device 254 (see FIG. 3).

The display control unit 204 may display the processed image on the display 256.

When the ophthalmologist diagnoses the patient's eye 12 to be inspected, the patient ID is input to the viewer 150. The viewer 150 in which the patient ID is input instructs the server 140 to transmit the image data of each image (IG1, IG4, etc.) together with the patient information corresponding to the patient ID. The viewer 150, which receives the image data of each image (IG1, IG4) together with the patient information, generates the diagnostic screen 400 of the patient's eye 12 to be inspected, which is shown in FIG. 19, and displays it on the display of the viewer 150.

FIG. 19 shows the diagnostic screen 400 of the viewer 150. As shown in FIG. 19, the diagnostic screen 400 has an information display area 402 and an image display area 404.

In the information display area 402, information about the patient such as the patient ID, the patient name, and the patient gender is displayed. Although not shown, the information display area 402 can also display various information such as the patient's age, visual acuity, information indicating whether the displayed image is the right eye or the left eye, and the axial length. The viewer 150 displays information about the corresponding patient in the information display area 402 based on the received patient information.

The image display area 404 includes a main image display area 404A and a composite image display area 404B. The viewer 150 displays images (fundus image IG1 as the main image and fundus image IG4 as the composite image) corresponding to each display area (404A, 404B) based on the received image data. Although not shown, the image display areas 404A and 404B can display the date when the image to be displayed was acquired.

As shown in FIG. 20, the fundus image IG4, which is a composite image, is a blood vessel portion of the fundus image IG2 when the upper part is fixed and the fundus image IG3 when the lower part is fixed, with the fundus image IG1 as a reference. It is an image synthesized by pattern matching or the like to match.

The image display area 404 can include a text display area for displaying text information related to the image. As an example of text information, for example, "In the left area, the fundus image when the fixation target is presented on the main optical axis AX is displayed. In the right area, the fixation targets are displayed vertically. Text information such as "A combined image of each fundus image when presented is displayed."

Further, although various information useful for diagnosis can be displayed on the diagnosis screen 400, it is omitted in the example shown in FIG.

The fixation unit 29 described above uses an optical element 29A that is excited by energy from UV light to emit fluorescence, but the technique of the present disclosure is not limited to this. For example, instead of fluorescent glass, a light emitting plate that emits light by supplying electric energy can be used. A fixation portion using a light emitting plate that emits light by supplying electric energy will be described as a seventh modification.

FIG. 21 is a conceptual diagram showing a configuration example of the seventh modification.
As shown in FIG. 21, in the seventh modification, as the fixation unit 29, a micro LED plate 500 is used instead of a fluorescent optical element such as fluorescent glass 290, and a power supply unit is used instead of the energy source 29B that emits UV light. It is configured to include 510 and. The micro LED plate 500 that functions as a fixation lamp is configured by incorporating a plurality of vertically and horizontally transparent LEDs 506 in a grid pattern in a transparent material 502 formed in a plate shape (for example, a flat plate shape). In the example shown in FIG. 21, a micro LED plate 500 incorporating a total of 36 transparent LEDs 506, 6 in length and 6 in width, is shown.

The micro LED plate 500 includes electrodes 504X and 504Y on the side edges. Each of the electrodes 504X and 504Y is connected to each of the plurality of transparent LEDs 506 incorporated in the transparent material 502, and is connected to the power supply unit 510. The power supply unit 510 supplies power as energy to the micro LED plate 500 so that power is supplied to any one of the transparent LEDs 506 via the electrodes 504X and 504Y. In the example shown in FIG. 21, the light emitting state of the transparent LED 506, which is the third from the top in the arrow Y direction and is supplied with power to the second transparent LED 506 from the leftmost in the direction opposite to the arrow X direction, is represented by a black circle. Shown. In this way, when the power supply unit 510 supplies power to the designated transparent LED 506 via the electrodes 504X and 504Y, the designated transparent LED 506 emits light, and the position where the designated transparent LED 506 emits light on the surface of the micro LED plate 500. Can be repositioned in two dimensions.

Therefore, the micro LED plate 500 of the seventh modification functions as an example of the "optical element" of the technique of the present disclosure, and the power supply unit 510 functions as an example of the "energy source" of the technique of the present disclosure.

The technology of the present disclosure is not limited to a micro LED plate incorporating a plurality of transparent LEDs as a light emitting plate to which electric power is supplied as energy. For example, it is possible to use a surface emitting element capable of designating a part of the light emitting surface and causing the designated part to emit surface light.

In the seventh modification, the following disclosed technique is proposed.
A portion of the imaging optical system for photographing the eye, which is arranged at a position conjugate with a predetermined portion of the eye and activated by electric power, emits visible light, and the portion that emits the visible light directs the direction of the eye. An optical element that functions as a guiding fixation target,
A power supply unit that supplies power so that the portion of the optical element that functions as the fixation target is activated.
Ophthalmic device equipped with.

Next, an application example of the technique of the present disclosure will be illustrated. An application example is to use an optical element that emits light by supplying energy to illuminate an ophthalmic apparatus. Since the following application example has the same configuration as that of the above embodiment, the same parts are designated by the same reference numerals and detailed description thereof will be omitted.

Generally, when illuminating the eye to be inspected, a complicated optical system for guiding the illumination light on the optical path of the main optical axis AX is required. On the other hand, as described above, the fluorescent glass 290 (optical element 29A) can emit fluorescence by excitation light (UV light) and can be formed into a simple plate-like structure. For example, a plate-shaped fluorescent glass 290 is provided on the optical path of the main optical axis AX, and the fluorescent glass 290 can be made to function as an illumination unit with a simple configuration in which the fluorescent glass 290 is irradiated with excitation light from the outside by a UV lamp 291. Is. That is, the fluorescent glass 290 and the UV lamp 291 can make the fluorescence emitted by the fluorescent glass 290 function as an illumination unit for illuminating the eye 12 to be inspected as illumination light.

Specifically, by arranging the fluorescent glass 290 at the fundus conjugate position Fcj (retinal conjugate position), it becomes possible to function as an illumination that illuminates an arbitrary area of the fundus. Further, by arranging the fluorescent glass 290 at the pupil conjugate position Pcj (pupil conjugate position) of the eye 12 to be inspected, the shape of the illumination light illuminating the eye 12 to be inspected 12 can be arbitrarily changed (for example, ring, crescent shape, upper and lower). , Left and right, ...) It becomes possible to function as lighting.

The first application example is an application example in which the fluorescent glass 290 formed in a plate shape is arranged at the fundus-conjugated position Fcj (retinal-conjugated position). The first application example functions effectively when illuminating an arbitrary position of the eye 12 to be examined with respect to the fundus (retina).

FIG. 22 schematically shows the configuration of the first application example. As shown in FIG. 22, the illumination unit 600 includes a fluorescent glass 290 arranged at the fundus conjugate position Fcj on the upstream side of the first lens group G1 on the eye 12 side to be inspected, and a UV lamp that irradiates the fluorescent glass 290 with UV light. Includes 291.

As shown in FIG. 22, when the fluorescent glass 290 is arranged at the fundus conjugate position Fcj (retinal conjugate position), the fluorescent glass 290 is in a state where the eye 12 to be inspected is directed in a predetermined direction (for example, the main optical axis AX). By selectively changing the portion that emits fluorescence in the above, it is possible to selectively illuminate only a specific region with respect to the fundus (retina) of the eye 12 to be inspected. For example, by deflecting the optical path of the UV light emitted from the UV Ramb 291 (for example, by the deflection element 292), the UV light from the UV Ramb 291 is selectively made to be two-dimensional on the surface of the fluorescent glass 290. The position can be changed. In this case, for example, a fixation portion may be provided separately so that the eye 12 to be inspected is directed in a predetermined direction (for example, the main optical axis AX).

In the example shown in FIG. 22, when UV light is irradiated to the intersection position of the fluorescent glass 290 and the main light axis AX by the UV ramp 291, it emits fluorescent light on the optical path of the main light axis AX. The portion Lc emitted by the fluorescence serves as a point light source for illumination provided on the main optical axis AX, and can illuminate the intersection portion Lcm between the fundus of the eye 12 to be inspected and the main optical axis AX. .. On the other hand, when UV light is irradiated to an arbitrary position other than the intersection position between the fluorescent glass 290 and the main optical axis AX, the fluorescent light is emitted at an arbitrary position on the fluorescent glass 290. The portion Ls emitted by the fluorescence serves as a point light source for illumination provided outside the main optical axis AX, and can illuminate a portion Lsm other than the intersection portion between the fundus of the eye 12 to be inspected and the main optical axis AX. It will be possible.

In the first application example, the following disclosed technique is proposed.
An optical element that is arranged at a position conjugate with the fundus of the eye in the photographing optical system for photographing the eye and that emits light at a portion activated by the supplied energy.
An energy source that supplies energy so that the portion corresponding to the set portion of the fundus of the eye is activated in a state where the direction of the eye is directed to a predetermined direction.
Ophthalmic lighting device equipped with.

The second application example is an application example in which the fluorescent glass 290 formed in a plate shape is arranged at the pupil-conjugated position Pcj (pupil-conjugated position) of the eye 12 to be inspected. The second application example functions effectively when the illumination light is illuminated with a predetermined shape for the eye 12 to be inspected.

FIG. 23 schematically shows the configuration of the second application example. As shown in FIG. 23, the illumination unit 610 is attached to the fluorescent glass 290 and the fluorescent glass 290 arranged at the fundus conjugate position Fcj on the upstream side of the objective optical system 28 (first lens group G1 and second lens group G2). Includes a UV lamp 291 that irradiates UV light.

As shown in FIG. 23, when the fluorescent glass 290 is arranged at the pupil conjugate position Pcj (pupil conjugate position), the eye 12 to be inspected 12 is oriented in a predetermined direction (for example, the main optical axis AX). It is possible to illuminate the pupil (pupil 27) of the optometry with a specific shape of illumination light. That is, the shape of the illumination light corresponding to the shape of the light emitted on the fluorescent glass 290 can be passed through the pupil of the eye 12 to be inspected. The illumination light that has passed through the pupil of the eye 12 to be inspected makes it possible to illuminate a predetermined area of the fundus (retina). For example, the shape of the UV light illuminating the pupil of the eye 12 to be inspected can be changed by deflecting the UV light emitted from the UV ramp 291 so as to have a predetermined shape on the fluorescent glass 290 (for example, by the deflection element 292). Is.

In the example shown in FIG. 23, the annular portion Lu that is fluorescently emitted by irradiating the annular UV light centered on the main optical axis AX with the UV ramp 291 is an illumination circle that functions as ring illumination. It serves as a ring light source, and the fluorescence from the ring light source illuminates the pupil (pupil 27) of the eye 12 to be inspected. In the pupil (pupil 27) of the eye 12 to be inspected, the portion Lpc through which fluorescence passes serves as a circular light source, and it becomes possible to illuminate the portion Luwf of the fundus of the eye to be inspected 12. That is, it is possible to illuminate the fundus region of UWF (ultra-wide angle) of 160 degrees or more by the objective optical system 28, for example, with an internal irradiation angle. By changing the size (for example, diameter) of the annular portion Lu, it is possible to adjust the size of the portion Luwf of the fundus of the eye 12 to be inspected.

In the second application example, the following disclosed technique is proposed.
An optical element that is arranged at a position conjugate with the pupil of the eye in the photographing optical system for photographing the eye and that emits light at a portion activated by the supplied energy.
An energy source that supplies energy so that a portion of the optical element having a preset shape is activated in a state where the direction of the eye is directed to a predetermined direction.
Ophthalmic lighting device equipped with.

The third application example is an application example in which the fluorescent glass 290 formed in a plate shape is arranged at each of the pupil-conjugated position Pcj (pupil-conjugated position) and the fundus-funded position Fcj (retinal-conjugated position). The third application example functions effectively when illuminating an arbitrary position of the eye 12 to be examined with respect to the fundus (retina).

FIG. 24 schematically shows the configuration of the third application example. As shown in FIG. 24, the fluorescent glass 290A is arranged at the fundus conjugate position Fcj between the first lens group G1 and the second lens group G2, and the objective optical system 28 (first lens group G1 and second lens group G2) is arranged. ), The fluorescent glass 290A is arranged at the fundus conjugate position Fcj on the upstream side. Further, each of the fluorescent glass 290A and the fluorescent glass 290B is irradiated with UV light by the UV lamp 291C. The fluorescent glass 290A and the UV lamp 291C form a fixation unit 29 similar to the above embodiment, and the fluorescent glass 290B and the UV lamp 291C form an illumination unit 620. In FIG. 24, an example of irradiating each of the fluorescent glass 290A and the fluorescent glass 290B with UV light by the UV lamp 291C is shown, but the UV lamp is independent for each of the fluorescent glass 290A and the fluorescent glass 290B. May be provided.

It is preferable that the fluorescent glass 290A and the fluorescent glass 290B have different fluorescence wavelengths.

As shown in FIG. 24, fluorescent glasses 290A and 290B are arranged at the pupil-conjugated position Pcj and the fundus-conjugated position Fcj, respectively, and by irradiating each with UV light, the fundus of the eye 12 to be inspected 12 is presented while presenting the fixation target. It becomes possible to illuminate (retina).

In the example shown in FIG. 24, by irradiating UV light with UV Rambu 291, the portion Arc emitted by fluorescence becomes a fixation target, and the intersection portion Lfu between the fundus of the eye 12 to be inspected and the main optical axis AX is illuminated. .. Further, by irradiating UV light with UV Rambu 291, the portion Lu emitted by fluorescence becomes a ring light source for illumination functioning as ring illumination, and it becomes possible to illuminate the fundus region of UWF (ultra-wide angle).

In the third application example, the following disclosed technique is proposed.
The portion of the photographing optical system for photographing the eye, which is arranged at a position conjugate with the fundus of the eye and is activated by energy, emits visible light, and the portion emitting the visible light guides the direction of the eye. The first optical element that functions as a fixation target,
A second optical element located at a position conjugate with the pupil of the eye in the photographing optical system for photographing the eye, and a portion activated by the supplied energy emits light.
Energy is supplied so that the portion of the first optical element that functions as the fixation target is activated, and energy is supplied so that the portion of the second optical element having a preset shape is activated. Energy source and
Ophthalmic device equipped with.

In the above, the ophthalmic apparatus 110 defines, for example, a region where the internal irradiation angle is 200 degrees with the eyeball center O of the eye 12 to be inspected as a reference position (167 degrees in the external irradiation angle based on the pupil of the eyeball of the eye to be inspected 12). It has a function to shoot, but it is not limited to this angle of view. The internal irradiation angle may be 200 degrees or more (external irradiation angle is 167 degrees or more and 180 degrees or less).

Further, the specifications may be such that the internal irradiation angle is less than 200 degrees (external irradiation angle is less than 167 degrees). For example, the internal irradiation angle is about 180 degrees (external irradiation angle is about 140 degrees), the internal irradiation angle is about 156 degrees (external irradiation angle is about 120 degrees), and the internal irradiation angle is about 144 degrees (external irradiation angle is about 110 degrees). The angle of view such as degree) may be used. The numbers are just an example.

In each of the above-described examples, the case where the processing is realized by software using a computer has been illustrated, but the technique of the present disclosure is not limited to this. For example, instead of software using a computer, various processes may be executed only by hardware such as FPGA (Field-Programmable Gate Array) or ASIC (Application Specific Integrated Circuit). Some of the various processes may be executed by software, and the remaining processes may be executed by hardware.

Further, in each of the above-described examples, the processor refers to a processor in a broad sense, and is a general-purpose processor (for example, CPU: Central Processing Unit, etc.) or a dedicated processor (for example, GPU: Graphics Processing Unit, ASIC: Application Special). Integrated Circuit, FPGA: Field Programmable Gate Array, programmable logic device, etc.).

Further, the operation of the processor in each of the above embodiments may be performed not only by one processor but also by a plurality of processors existing at physically separated positions in cooperation with each other. Further, the order of each operation of the processor is not limited to the order described in each of the above examples, and may be changed as appropriate.

12 Optometry 14 Imaging device 16 Control device 28 Objective optical system 29 Fixed vision 29A Optical element 29B Energy source 30 Wide-angle optical system 100 Ophthalmology system 110 Ophthalmology system 110 Ophthalmology device 130 Network 140 Server 150 Viewer 290 Fluorescent glass

Claims (11)

An optical element in which a portion activated by energy emits visible light, and the portion that emits visible light functions as a fixation target that guides the direction of the eye to be inspected.
An energy source that supplies energy so that the portion of the optical element that functions as the fixation target is activated.
Ophthalmic device equipped with. The first aspect of the present invention includes a changing portion that changes the supply direction of the energy supplied from the energy source and changes the supply direction of the energy so that the portion of the optical element that functions as the fixation target is activated. Ophthalmic equipment. The energy source is a light source that emits light in a wavelength range different from the light in the wavelength range used when photographing the eye to be inspected.
The ophthalmic apparatus according to claim 1 or 2, wherein the optical element emits visible light by irradiating light in the different wavelength range. The light source is an ultraviolet light source that emits ultraviolet light.
The ophthalmic apparatus according to claim 3, wherein the visible light emitted by the optical element is fluorescent. The ophthalmic apparatus according to claim 4, wherein the optical element includes a visible light emitting portion that emits visible light and an ultraviolet light limiting portion that limits the transmission of ultraviolet light. The ophthalmic apparatus according to claim 1, wherein the optical element is arranged as a photographing optical system for photographing the eye to be inspected, and is arranged at a position conjugate with the portion of the eye to be inspected. The ophthalmic apparatus according to claim 6, wherein the site is the retina or the pupil. Claims 1 to 1 include a control unit that controls so that the energy is supplied to the portion of the optical element that functions as the fixation target based on the information input as the direction for guiding the eye to be inspected. 7. The ophthalmic apparatus according to any one of 7. The ophthalmic apparatus according to any one of claims 1 to 8, which includes an imaging unit for photographing the eye to be inspected. A method of controlling an ophthalmic device executed by a processor.
In contrast to an optical element in which an energy-activated portion emits visible light and the portion that emits visible light functions as a fixation target that guides the direction of the eye to be inspected. A method of controlling an ophthalmic device that involves supplying energy to activate a portion that functions as an optotype. A program that is stored in a storage medium and causes a processor to control an ophthalmic apparatus.
The processor
The portion activated by energy emits visible light, and the portion that emits visible light functions as a fixation target that guides the direction of the eye to be inspected, whereas the portion that emits the visible light serves as the fixation target of the optical element. When supplying energy so that the functioning part is activated
A program that executes processing including controlling so that energy is supplied to the portion of the optical element that functions as the fixation target, based on the information input as the direction for guiding the eye to be inspected.

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