JP2017055976A - Ophthalmic apparatus and control method therefor, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanism which, when photographing an anterior ocular segment, enables correct focusing without changing the illumination state of the subject eye, thereby achieving proper photographing of the anterior ocular segment.SOLUTION: The present invention relates to an ophthalmic apparatus comprising: an anterior ocular segment illumination light source 615 for illuminating an anterior ocular segment of a subject eye E with light; a focus lens 612 for bringing the subject eye E into focus; an imaging element 613 for receiving reflected light of the light from the subject eye E through the focus lens 612 and imaging the subject eye E; a movable part 3 for driving an optometry unit 6 relative to the subject eye E, the optometry unit being a housing which includes the anterior ocular segment illumination light source 615, focus lens 612, and imaging element 613; and control means which, during focusing for photographing of the anterior ocular segment of the subject eye E, adjusts the position of the focus lens 612 along the optical axis with the optometry unit 6 fixed, without the driving being performed by the movable part 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an ophthalmologic apparatus for photographing an eye to be examined, a control method thereof, and a program for causing a computer to execute the control method.

  As a conventional ophthalmologic apparatus, an apparatus capable of photographing an anterior segment of an eye to be examined has been developed. As a technique related to such an ophthalmologic apparatus, Patent Document 1 discloses an anterior eye unit that automatically inserts an auxiliary lens into an optical axis and moves a focus lens to a predetermined position when switching from a fundus photographing mode to an anterior eye photographing mode. An auxiliary function for photographing is disclosed.

JP 2012-50592 A

  Here, in a conventional ophthalmologic apparatus, focus adjustment (focus adjustment) at the time of anterior segment imaging is generally performed by moving the entire imaging unit with respect to the eye to be examined. At this time, since the state of illumination on the eye to be examined changes with the state of focus, it is difficult to perform proper focus adjustment.

  The present invention has been made in view of such problems, and it is possible to perform appropriate focus adjustment without changing the illumination state of the subject's eye at the time of photographing the anterior segment so that an appropriate anterior segment is obtained. The purpose of this is to provide a mechanism for realizing department shooting.

The ophthalmologic apparatus of the present invention includes an anterior ocular segment illumination means for illuminating the anterior ocular segment of the eye to be examined with light, a focusing means for focusing the eye to be examined, and reflection of the light from the eye to be examined. Light is received through the focusing means, and an imaging means for imaging the eye to be examined, and a housing including the anterior ocular segment illumination means, the focusing means, and the imaging means are driven with respect to the eye to be examined. A drive unit, an operation unit for instructing driving by the drive unit, and the housing by the drive unit according to an instruction from the operation unit during focus adjustment in anterior segment imaging for imaging the anterior segment. Control means for performing control to adjust the position of the focusing means along the optical axis without driving the body.
According to another aspect of the ophthalmologic apparatus of the present invention, an anterior ocular segment illumination unit that illuminates the anterior ocular segment of the subject eye with light, a focusing unit that focuses the subject eye, and An imaging unit that receives the reflected light of the light through the focusing unit and images the eye to be inspected, and a housing that includes the anterior ocular segment illumination unit, the focusing unit, and the imaging unit to the eye to be inspected The focusing means in a state in which the housing is fixed without being driven by the driving means at the time of focus adjustment in anterior eye part photographing for photographing the anterior eye part. And control means for performing control to adjust the angle along the optical axis.
The present invention also includes a method for controlling the above-described ophthalmologic apparatus and a program for causing a computer to execute the control method.

  According to the present invention, it is possible to perform proper focus adjustment without changing the illumination state of the eye to be inspected at the time of photographing the anterior segment. This makes it possible to realize appropriate anterior segment imaging.

It is a figure which shows an example of the whole structure centering on the optical system of the ophthalmologic apparatus which concerns on embodiment of this invention. It is a perspective view of the alignment operation member shown in FIG. It is a figure which shows an example of the whole structure centering on the electrical system of the ophthalmologic apparatus which concerns on embodiment of this invention. It is a schematic diagram in the cross section of the eye E to be examined shown in FIG. It is a flowchart which shows an example of the process sequence in the control method of the ophthalmologic apparatus which concerns on embodiment of this invention. It is a flowchart which shows an example of the process sequence in the control method of the ophthalmologic apparatus which concerns on embodiment of this invention. It is a flowchart which shows an example of the process sequence in the control method of the ophthalmologic apparatus which concerns on embodiment of this invention. It is a flowchart which shows an example of the process sequence in the control method of the ophthalmologic apparatus which concerns on embodiment of this invention.

  Hereinafter, embodiments (embodiments) for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating an example of an overall configuration centering on an optical system of an ophthalmologic apparatus 100 according to an embodiment of the present invention. Here, the ophthalmologic apparatus 100 according to the present embodiment assumes a fundus camera.

  As shown in FIG. 1, the ophthalmologic apparatus 100 includes a fixed portion 1 having a chin receiving portion 2 that supports a subject's jaw, a movable portion 3, an alignment operation member 4, a focus operation member 5, an optometry portion 6, and a display. The main part 7 and the anterior ocular segment photographing mode changeover switch 8 are provided as main components. In addition, the movable unit 3, the alignment operation member 4, the focus operation member 5, and the anterior segment imaging mode changeover switch 8 are provided in contact with the fixed unit 1.

  The optometry unit 6 is provided in contact with the movable unit 3, and the display unit 7 is provided in contact with the optometry unit 6. The optometry unit 6 is provided with various optical systems and the like used for irradiating the eye E with observation light and the like, and for observing and photographing the eye E.

[Optical system]
The optical system of the optometry unit 6 is roughly divided into a light source unit O1, an illumination optical system O2, an imaging / illumination optical system O3, and an imaging optical system O4. The light beam irradiated by the light source unit O1 illuminates the eye E through the illumination optical system O2 and the photographing / illumination optical system O3, and part of the reflected light passes through the photographing / illumination optical system O3 and the photographing optical system O4. Then, an image is formed on the image sensor 613.

First, the light source unit O1 will be described.
The light source unit O1 mainly includes a light source 601, a condenser lens 602, a ring slit 603, and a crystalline lens baffle 604.

  The light source 601 is a set of visible light LEDs and IR-EDs arranged substantially concentrically on the optical axis. Specifically, at the time of fundus observation, an infrared light source 601a including a base on which IR-EDs that irradiate infrared light are arranged substantially concentrically is disposed on the optical axis. Further, at the time of photographing, a visible light source 601b comprising a base on which visible light LEDs for irradiating visible light are arranged substantially concentrically is disposed on the optical axis. The arrangement of the infrared light source 601a and the visible light source 601b on the optical axis can be switched by a motor and a drive system (not shown). The light source 601 constitutes fundus illumination means for irradiating the fundus of the eye E to be examined. The condenser lens 602 is a general spherical lens. The ring slit 603 is a flat plate having an annular opening. The crystalline lens baffle 604 is also a flat plate having an annular opening.

  The light beam emitted from the light source 601 is condensed toward the fundus of the eye E by the condenser lens 602, and is shaped by the ring slit 603 so that the shape of the light beam when passing through the anterior eye portion of the eye E is annular. The Further, the lens baffle 604 restricts the light beam projected onto the lens of the eye E to prevent reflection of reflected light from the lens onto the fundus image.

Next, the illumination optical system O2 will be described.
The illumination optical system O2 mainly includes a first illumination relay lens 605, a second illumination relay lens 606, a split unit 607, and a corneal baffle 608.

  The illumination optical system O2 relays the light beam generated by the light source unit O1 and creates an index image for focusing the fundus image. The ring-shaped illumination light is focused on the eye E by the first illumination relay lens 605 and the second illumination relay lens 606.

  The split unit 607 includes a focus index light source 607a, a prism 607b, a focus index mask 607c, an advance / retreat mechanism described later, and a move mechanism described later. The focus index light source 607a is used to project a focus index. The prism 607b is used to divide the light source. The focus index mask 607c is used to indicate the outline of the focus index.

  The advance / retreat mechanism has a split advance / retreat drive motor M1. The split advance / retreat drive motor M1 causes the split unit 607 to enter the illumination optical system O2 during fundus observation, and projects a split index in the observation image. Further, the split advance / retreat drive motor M1 is controlled so that the split unit 607 is retracted from the illumination optical system O2 at the time of photographing so that the focus index does not move into the photographed image.

  The moving mechanism includes a split shift drive motor M2 and a split position sensor S01. The split shift drive motor M2 is used to shift the focus index light source 607a, the prism 607b, and the focus index mask 607c in the optical axis direction (arrow direction in FIG. 1) to focus the focus index during fundus observation. The split position sensor S01 detects the stop position.

  The corneal baffle 608 is for preventing unnecessary reflected light from being reflected in the fundus image from the cornea of the eye E to be examined.

Next, the photographing / illumination optical system O3 will be described.
The photographing / illumination optical system O3 projects an illumination light beam onto the eye E and derives a reflected light beam from the eye E. This photographing / illumination optical system O3 mainly includes a perforated mirror 609 and an objective lens 610.

  The perforated mirror 609 has a mirror at the outer periphery and a hole at the center. The perforated mirror 609 illuminates the eye E through the objective lens 610 by reflecting the light beam guided from the illumination optical system O2 at the mirror portion. A part of the reflected light beam from the illuminated eye E to be examined returns to the objective lens 610, and is led to the photographing optical system O4 through the hole in the center of the holed mirror 609.

Next, the photographing optical system O4 will be described.
The imaging optical system O4 forms an image on the image sensor 613 after performing focus adjustment (focus adjustment) of the fundus image of the eye E to be examined. The photographing optical system O4 mainly includes a diopter correction lens 611, a focus lens (focusing lens) 612, a focus lens position sensor S02, a focus lens drive motor M4, an image sensor 613, and an image processing unit 614. ing.

  The diopter correction lens 611 is a convex lens that is installed in the photographing optical system O4 so as to be able to advance and retreat in order to focus on the fundus of the subject eye E of near-sighted / far-sighted eye E that is difficult to adjust with the focus lens 612 for focus adjustment. And concave lenses. Diopter correction lens advancing / retreating motor M3 allows diopter correction-lens 611b when the subject is high myopia and diopter correction + lens 611a when the subject is hyperopic. The photographic optical system O4 is advanced and retracted. The focus lens 612 is a lens for adjusting the focus of the photographing light beam that has passed through the center hole of the perforated mirror 609, and performs focus adjustment by moving in the direction of the arrow in FIG. The focus lens drive motor M4 drives the focus lens 612 for focus adjustment, and the focus lens position sensor S02 detects the stop position of the focus lens 612. The image sensor 613 photoelectrically converts the photographing light of the eye E to generate an image signal. The image processing unit 614 performs a process of A / D converting the image signal obtained by the image sensor 613 into digital image data. The image data obtained by the image processing unit 614 is displayed on the display unit 7 during infrared observation, and is recorded on a recording medium (not shown) after photographing.

  An anterior ocular segment illumination light source 615 (illustrating 615a and 615b in FIG. 1) illuminates the anterior segment of the eye E by irradiating the anterior segment of the eye E with light. Are arranged). The anterior segment illumination light source 615 is a set of IR-EDs arranged in a plurality of substantially concentricity with the objective lens 610. The anterior segment illumination light source 615 illuminates the anterior segment of the eye E during imaging and observation of the anterior segment.

[XYZ movable part]
The movable unit 3 is an optometric unit with respect to the fixed unit 1 by a known drive mechanism represented by a combination of a drive source (motor), a speed reduction mechanism, a rotation / linear motion conversion mechanism (rack and pinion), and a sliding mechanism. 6 in the left-right (X) direction (direction perpendicular to the paper surface, which is the eye width direction of the eye E), and the front-rear (Z) direction (left-right direction in FIG. 1, which is a direction toward and away from the eye E). It is configured to be movable. In addition, the movable part 3 is connected to the fixed part 1 by a known drive mechanism represented by a combination of a drive source (motor), a speed reduction mechanism, a rotation linear motion conversion mechanism (feed screw and nut), and a sliding mechanism. The optometry unit 6 is configured to be movable in the vertical (Y) direction (vertical direction in the figure). Through the movable part 3, the optometry part 6 can move in the three-dimensional (XYZ) direction with respect to the fixed part 1, and alignment with the eye E to be examined is possible.

[Alignment operation member]
FIG. 2 is a perspective view of the alignment operation member 4 shown in FIG.
The alignment operation member 4 is an operation means for instructing driving by the movable portion 3. Specifically, the alignment operation member 4 includes an operating rod 41, a rotary dial 42, and a photographing switch 43 for operating the drive mechanism described above. Further, the alignment operation member 4 includes a Y alignment operation amount detection sensor S03. When the examiner turns the rotary dial 42, the Y alignment operation amount detection sensor S03 detects the Y alignment operation amount. Further, the alignment operation member 4 includes a Z alignment operation amount detection sensor S04 that detects the tilt of the operation rod 41 in the front-rear direction (the FB direction in FIG. 2), and the left-right direction (in FIG. 2). An X-alignment operation amount detection sensor S05 for detecting a tilt in the (LR direction) is attached.

  When the operating rod 41 tilts in the FB direction of FIG. 2, the Z alignment operation amount detection sensor S04 moves, and the Z alignment operating amount corresponding to the tilting amount of the operating rod 41 is detected. The system control unit (101 in FIG. 3 described later) drives the Z motor M6 in accordance with the Z alignment operation amount, and moves the optometry unit 6 in the Z direction. When the operation rod 41 is tilted in the LR direction of FIG. 2, the X alignment operation amount detection sensor S05 is moved, and the X alignment operation amount corresponding to the tilt amount of the operation rod 41 is detected. The system control unit (101 in FIG. 3 described later) drives the X motor M5 in accordance with the X alignment operation amount and moves the optometry unit 6 in the X direction.

  The rotary dial 42 is arranged coaxially with the operation rod 41, and a Y alignment operation amount detection sensor S03 is formed inside. When the examiner rotates the rotary dial 42 in the UD direction in FIG. 2, the Y alignment operation amount detection sensor S03 detects the Y alignment operation amount based on the rotation direction and the rotation angle per unit time. The system control unit (101 in FIG. 3 described later) drives the Y motor M7 in accordance with the Y alignment operation amount and moves the optometry unit 6 in the Y direction.

  The imaging switch 43 is a switch that performs imaging when pressed by the examiner.

[Focus operation member]
The focus operation member 5 includes a focus dial disposed coaxially with the alignment operation member 4 and a focus operation amount detection sensor S06 disposed inside the focus dial. When the examiner rotates the focus dial of the focus operation member 5, the focus operation amount detection sensor S06 detects the focus operation amount based on the rotation direction and the rotation angle per unit time. The system control unit 101 moves the focus lens 612 by driving the focus lens driving motor M4 according to the focus operation amount.

[Control system]
FIG. 3 is a diagram illustrating an example of the overall configuration centered on the electrical system of the ophthalmologic apparatus 100 according to the embodiment of the present invention. In FIG. 3, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals.

  The system control unit 101 comprehensively controls operations in the ophthalmic apparatus 100.

The power switch 102 is a switch for selecting the power state of the ophthalmic apparatus 100.
The XZ motor drive circuit 103 drives the Z motor M6 according to the output of the Z alignment operation amount detection sensor S04, and drives the X motor M5 according to the output of the X alignment operation amount detection sensor S05. Further, the XZ motor driving circuit 103 drives the Z motor M6 when the anterior ocular segment photographing mode switching switch 8 is pressed by an operator's manual operation based on the control of the system control unit 101, and the optometric unit 6 Is driven to a predetermined position, and movement in the Z direction is prohibited. Thereby, anterior ocular segment imaging in which the illumination state of the anterior segment of the eye E is not changed is possible.
The Y motor drive circuit 104 drives the Y motor M7 according to the output of the Y alignment operation amount detection sensor S03.

The M1 drive circuit 105 drives the split advance / retreat drive motor M1 so that the split unit 607 is retracted from the illumination optical system O3 when the photographing switch 43 is pressed by an operator's manual operation.
The M2 drive circuit 106 drives the split shift drive motor M2 according to the output of the focus operation amount detection sensor S06.
The M3 drive circuit 107 drives a diopter correction lens advance / retreat drive motor M3 in accordance with an operation of a diopter correction switch (not shown). Further, the M3 driving circuit 107 drives the diopter correction lens advance / retreat drive motor M3 when the anterior ocular segment shooting mode changeover switch 8 is pressed by the examiner's manual operation, and sets the diopter correction + lens 611a to the imaging light. Insert into the shaft.
The M4 drive circuit 108 drives the focus lens drive motor M4 according to the output of the focus operation amount detection sensor S06. The M4 drive circuit 108 also detects a Z alignment operation amount detection sensor corresponding to the amount of inclination of the operation rod 41 in the FB direction when the anterior ocular segment imaging mode changeover switch 8 is pressed by an operator's manual operation. The focus lens drive motor M4 is driven according to the output of S04.

  The photographing light source control circuit 109 charges the energy for emitting the visible light source 601b before photographing, and discharges the electric energy charged during photographing to cause the visible light source 601b to emit light.

[Anterior segment imaging region]
FIG. 4 is a schematic diagram of a cross section of the eye E shown in FIG. FIG. 4 shows each part of the lens E1, the iris E2, the cornea E3, and the eyelid E4.

  As shown in FIG. 4, various tissues such as eyelids E4 and iris E2 exist in the anterior eye region of the eye E to be examined. Since these parts have different positions in the Z direction, the distance between the movable part 3 suitable for imaging and the eye E to be examined is different. In particular, the meibomian gland on the back side of the eyelid E4 is close to the ophthalmologic apparatus 100 because it is necessary to turn the eyelid E4 over when photographing. For this reason, it is preferable to move the movable portion 3 (more specifically, the optometry unit 6) away from the eye E during photographing of the eyelid E4. In addition, since the iris E2 exists in a position deep with respect to the ophthalmologic apparatus 100, it is better to bring the movable part 3 (more specifically, the optometry part 6) closer to the eye E when photographing the iris E2. preferable.

[Anterior Eye Shooting Mode]
In the present embodiment, the imaging region of the eye E can be changed each time the operator presses the anterior segment imaging mode switch 8. That is, the anterior ocular segment imaging mode switching switch 8 constitutes an imaging region designating unit for designating an imaging region of the eye E. Then, before the focus adjustment, the system control unit 101 drives the housing of the optometry unit 6 to a position corresponding to the imaging region designated by the anterior ocular segment imaging mode switch 8 to bring the casing into the position. When the focus is fixed and the focus is adjusted thereafter, control is performed to adjust the position of the focus lens 612 along the optical axis. Here, whether or not the focus adjustment is optimal may be determined based on, for example, whether or not the image is clear by looking at the image displayed on the display unit 7 by the examiner, For example, the system control unit 101 may make a determination based on image contrast or the like.

  In the present embodiment, once the anterior segment imaging mode changeover switch 8 is operated, the camera shifts to the eyelid photographing mode for performing photographing related to eyelid E4. When shifting to the eyelid photographing mode, the XZ motor driving circuit 103 drives the Z motor M6 until the movable portion 3 (more specifically, the optometry portion 6) is in a position suitable for eyelid photographing. And the subsequent drive of the Z motor M6 is prohibited. Thereafter, when the system control unit 101 detects the signal of the Z alignment operation amount detection sensor S04, the system control unit 101 outputs a drive signal of the focus lens drive motor M4 to the M4 drive circuit 108. As a result, the movable portion 3 (more specifically, the optometry unit 6) is prohibited from moving back and forth, the focus lens 612 moves on the optical axis, and proper focus adjustment is performed on the eye E4 of the eye E. It becomes possible. Specifically, in the present embodiment, when the imaging region designated by the anterior ocular segment imaging mode changeover switch 8 is 瞼 E4, the system control unit 101 performs the anterior ocular segment imaging mode changeover switch 8 before the focus adjustment. In this case, the housing of the optometry unit 6 is driven to a position farther from the eye E than the position when an iris E2 (described later) is designated as the imaging region, and the casing is fixed at the position, and then the focus is adjusted. In addition, control for adjusting the position of the focus lens 612 along the optical axis is performed. When the eyelid E4 is designated as the imaging region, the reason for fixing the rod of the optometry unit 6 at a position farther from the eye E than the position when the iris E2 described later is designated as the imaging region is shown in FIG. This is because the eyelid E4 exists on the near side with respect to the ophthalmologic apparatus 100 with respect to the iris E2, as described above with reference to FIG.

  When the anterior segment imaging mode changeover switch 8 is operated again, the operation shifts to an iris imaging mode in which imaging related to the iris E2 is performed. When shifting to the iris photographing mode, the XZ motor driving circuit 103 drives the Z motor M6, and the Z motor M6 until the movable part 3 (more specifically, the optometry part 6) comes to a position suitable for iris photographing. And the subsequent drive of the Z motor M6 is prohibited. Thereafter, when the system control unit 101 detects the signal of the Z alignment operation amount detection sensor S04, the system control unit 101 outputs a drive signal of the focus lens drive motor M4 to the M4 drive circuit 108. As a result, the movable portion 3 (more specifically, the optometry unit 6) is prohibited from moving back and forth, the focus lens 612 moves on the optical axis, and proper focus adjustment is performed on the iris E2 of the eye E. It becomes possible. Specifically, in the present embodiment, when the imaging region designated by the anterior segment imaging mode switching switch 8 is the iris E2, the system control unit 101 performs the anterior segment imaging mode switching switch 8 before the focus adjustment. Then, the housing of the optometry unit 6 is driven to a position closer to the eye E than the position when the above-described eyelid E4 is designated as the imaging region, and the housing is fixed at the position, and then the focus is adjusted. In addition, control for adjusting the position of the focus lens 612 along the optical axis is performed. When the iris E2 is designated as the imaging region, the reason why the rod of the optometry unit 6 is fixed at a position closer to the eye E than the position when the eyelid E4 is specified as the imaging region is shown in FIG. This is because the iris E2 exists on the back side with respect to the ophthalmologic apparatus 100 with respect to the eyelid E4 as described above.

  When the anterior ocular segment imaging mode switching switch 8 is operated again, the fundus imaging mode for imaging the fundus of the eye E is returned. Specifically, in the present embodiment, when the imaging region designated by the anterior ocular segment imaging mode switch 8 is the fundus, the system control unit 101 responds to a predetermined fundus before focus adjustment. The housing of the optometry unit 6 is driven to a position to fix the casing to the position, and control for adjusting the position of the focus lens 612 along the optical axis is performed during subsequent focus adjustment.

[Release shooting position lock]
Depending on the subject, there may be an eye E to be examined which is far away from the eyeball or an eye E to which the eyeball protrudes extremely. When such an anterior imaging of the subject is performed, the focus lens 612 may not be able to adjust the focus. In such a case, in this embodiment, when the operating rod 41 is tilted to the end in the front-rear direction, the Z alignment position can be released.

  When the operation rod 41 is tilted and the signal of the Z alignment operation amount detection sensor S04 becomes an output that is tilted to the maximum, the system control unit 101 shifts to the stage drive rod shooting mode or the stage drive iris shooting mode, and the Z alignment is performed. The Z motor M6 is driven according to the output of the operation amount detection sensor S04.

  When the anterior ocular photographing mode changeover switch 8 is operated again, the system control unit 101 drives the Z motor M6 until the movable unit 3 comes to a position suitable for eyelid photographing or iris photographing, and the subsequent Z motor. The driving of M6 is prohibited.

[flowchart]
FIGS. 5-8 is a flowchart which shows an example of the process sequence in the control method of the ophthalmic apparatus 100 which concerns on embodiment of this invention.

  First, the flowchart of FIG. 5 will be described. Specifically, FIG. 5 is a flowchart of the eyelid photographing mode.

  In step S101, the system control unit 101 starts the process of the flowchart of FIG.

  In step S102, the system control unit 101 performs control to turn on the anterior segment illumination light source 615 (in FIG. 1, 615a and 615b are illustrated).

  Subsequently, in step S103, the system control unit 101 determines whether or not the anterior segment imaging mode changeover switch 8 has been operated. If the result of this determination is that the anterior segment imaging mode changeover switch 8 has not been operated (S103 / N), the process waits at step S103 until it is determined that the eyepiece imaging mode changeover switch 8 has been operated.

On the other hand, if the result of determination in step S103 is that the anterior segment imaging mode switch 8 has been operated (S103 / Y), processing proceeds to step S104.
In step S104, the system control unit 101 performs control to insert the diopter correction + lens 611a into the optical axis by the diopter correction lens advance / retreat drive motor M3.

  Subsequently, in step S105, the system control unit 101 determines whether or not the anterior segment imaging mode switching switch 8 has been operated. If the result of this determination is that the anterior segment imaging mode changeover switch 8 has been operated (S105 / Y), the routine proceeds to step S106. That is, in this case, the process shifts to step S201 in FIG. 6 in order to shift to the iris photographing mode. This FIG. 6 will be described later.

On the other hand, if the result of determination in step S105 is that the anterior segment imaging mode switch 8 has not been operated (S105 / N), processing proceeds to step S107.
In step S107, the system control unit 101 determines whether the position of the movable unit 3 in the Z direction is a predetermined position in the eyelid photographing mode.

If the result of determination in step S107 is that the position in the Z direction of the movable portion 3 is not a predetermined position in the eyelid shooting mode (S107 / N), the process proceeds to step S108.
In step S108, the system control unit 101 performs control for driving the Z motor M6. Thereafter, the process returns to step S105.

On the other hand, if the result of determination in step S107 is that the position of the movable part 3 in the Z direction is a predetermined position in the eyelid shooting mode (S107 / Y), the process proceeds to step S109.
In step S109, the system control unit 101 determines whether there is a change in the output of the X alignment operation amount detection sensor S05.

As a result of the determination in step S109, when there is a change in the output of the X alignment operation amount detection sensor S05 (S109 / Y), the process proceeds to step S110.
In step S110, the system control unit 101 performs control to drive the X motor M5. Thereafter, the process returns to step S105.

On the other hand, as a result of the determination in step S109, if there is no change in the output of the X alignment operation amount detection sensor S05 (S109 / N), the process proceeds to step S111.
In step S111, the system control unit 101 determines whether there is a change in the output of the Y alignment operation amount detection sensor S03.

As a result of the determination in step S111, when there is a change in the output of the Y alignment operation amount detection sensor S03 (S111 / Y), the process proceeds to step S112.
In step S112, the system control unit 101 performs control to drive the Y motor M7. Thereafter, the process returns to step S105.

On the other hand, as a result of the determination in step S111, if there is no change in the output of the Y alignment operation amount detection sensor S03 (S111 / N), the process proceeds to step S113.
In step S113, the system control unit 101 determines whether there is a change in the output of the Z alignment operation amount detection sensor S04.

As a result of the determination in step S113, if there is a change in the output of the Z alignment operation amount detection sensor S04 (S113 / Y), the process proceeds to step S114.
In step S114, the system control unit 101 performs control to drive the focus lens drive motor M4, and performs control to adjust the position of the focus lens 612 that is a focusing unit along the optical axis. This step S114 is a case where focus adjustment is performed in anterior segment imaging for imaging the anterior segment of the eye E. At this time, the system control unit 101 does not drive the movable unit 3 and performs the optometry unit. In a state where 6 is fixed, control for adjusting the position of the focus lens 612 along the optical axis is performed. Thereafter, the process returns to step S105.

On the other hand, as a result of the determination in step S113, if there is no change in the output of the Z alignment operation amount detection sensor S04 (S113 / N), the process proceeds to step S115.
In step S115, the system control unit 101 determines whether the output of the Z alignment operation amount detection sensor S04 is maximum.

  As a result of the determination in step S115, when the output of the Z alignment operation amount detection sensor S04 is maximum (S115 / Y), the process proceeds to step S116. That is, in this case, the process proceeds to step S301 in FIG. FIG. 7 will be described later.

On the other hand, as a result of the determination in step S115, if the output of the Z alignment manipulated variable detection sensor S04 is not maximum (S115 / N), the process proceeds to step S117.
In step S117, the system control unit 101 determines whether the photographing switch 43 has been operated. If the result of this determination is that the shooting switch 43 has not been operated (S117 / N), processing returns to step S105.

On the other hand, if the result of determination in step S117 is that the shooting switch 43 has been operated (S117 / Y), processing proceeds to step S118.
In step S118, the system control unit 101 performs control to record an image related to the eyelid E4 obtained by the image sensor 613 on a recording medium (not shown).

  Thereafter, in step S119, the system control unit 101 ends the process of the flowchart of FIG.

  Next, the flowchart of FIG. 6 will be described. Specifically, FIG. 6 is a flowchart of the iris shooting mode.

  In step S201, the system control unit 101 starts the processing of the flowchart of FIG.

  In step S202, the system control unit 101 determines whether or not the anterior ocular segment imaging mode changeover switch 8 has been operated.

If the result of determination in step S202 is that the anterior ocular segment imaging mode changeover switch 8 has been operated (S202 / Y), processing proceeds to step S203.
In step S203, the system control unit 101 performs control for removing the diopter correction + lens 611a from the optical axis by the diopter correction lens advance / retreat drive motor M3. When the process of step S203 ends, the process proceeds to step S204. That is, in this case, the process proceeds to step S101 in FIG.

On the other hand, if the result of determination in step S202 is that the anterior segment imaging mode changeover switch 8 has not been operated (S202 / N), the process proceeds to step S205.
In step S205, it is determined whether or not the position of the movable unit 3 in the Z direction is a predetermined position in the iris photographing mode.

As a result of the determination in step S205, when the position of the movable unit 3 in the Z direction is not a predetermined position in the iris photographing mode (S205 / N), the process proceeds to step S206.
In step S206, the system control unit 101 performs control to drive the Z motor M6. Thereafter, the process returns to step S202.

On the other hand, as a result of the determination in step S205, when the position of the movable unit 3 in the Z direction is a predetermined position in the iris photographing mode (S205 / Y), the process proceeds to step S207.
In step S207, the system control unit 101 determines whether there is a change in the output of the X alignment operation amount detection sensor S05.

As a result of the determination in step S207, if there is a change in the output of the X alignment operation amount detection sensor S05 (S207 / Y), the process proceeds to step S208.
In step S208, the system control unit 101 performs control to drive the X motor M5. Thereafter, the process returns to step S202.

On the other hand, as a result of the determination in step S207, if there is no change in the output of the X alignment operation amount detection sensor S05 (S207 / N), the process proceeds to step S209.
In step S209, the system control unit 101 determines whether there is a change in the output of the Y alignment operation amount detection sensor S03.

As a result of the determination in step S209, if there is a change in the output of the Y alignment operation amount detection sensor S03 (S209 / Y), the process proceeds to step S210.
In step S210, the system control unit 101 performs control to drive the Y motor M7. Thereafter, the process returns to step S202.

On the other hand, as a result of the determination in step S209, if there is no change in the output of the Y alignment operation amount detection sensor S03 (S209 / N), the process proceeds to step S211.
In step S211, the system control unit 101 determines whether there is a change in the output of the Z alignment operation amount detection sensor S04.

As a result of the determination in step S211, when the output of the Z alignment operation amount detection sensor S04 has changed (S211 / Y), the process proceeds to step S212.
In step S212, the system control unit 101 performs control to drive the focus lens drive motor M4, and performs control to adjust the position of the focus lens 612 that is a focusing unit along the optical axis. This step S212 is a case where focus adjustment is performed in anterior segment imaging in which the anterior segment of the subject eye E is captured. At this time, the system control unit 101 does not drive the movable unit 3 to perform the optometry unit. In a state where 6 is fixed, control for adjusting the position of the focus lens 612 along the optical axis is performed. Thereafter, the process returns to step S202.

On the other hand, as a result of the determination in step S211, when there is no change in the output of the Z alignment operation amount detection sensor S04 (S211 / N), the process proceeds to step S213.
In step S213, the system control unit 101 determines whether the output of the Z alignment operation amount detection sensor S04 is maximum.

  As a result of the determination in step S213, when the output of the Z alignment operation amount detection sensor S04 is maximum (S213 / Y), the process proceeds to step S214. That is, in this case, in order to shift to the stage drive iris imaging mode, the process proceeds to step S401 in FIG. This FIG. 8 will be described later.

On the other hand, as a result of the determination in step S213, if the output of the Z alignment operation amount detection sensor S04 is not the maximum (S213 / N), the process proceeds to step S215.
In step S215, the system control unit 101 determines whether the photographing switch 43 has been operated. If the result of this determination is that the shooting switch 43 has not been operated (S215 / N), processing returns to step S202.

On the other hand, as a result of the determination in step S215, if the photographing switch 43 is operated (S215 / Y), the process proceeds to step S216.
In step S216, the system control unit 101 performs control to record an image related to the iris E2 obtained by the image sensor 613 on a recording medium (not shown).

  Thereafter, in step S217, the system control unit 101 ends the process of the flowchart of FIG.

  Next, the flowchart of FIG. 7 will be described. Specifically, FIG. 7 is a flowchart of the stage drive 瞼 shooting mode.

  In step S301, the system control unit 101 starts the processing of the flowchart of FIG.

  In step S <b> 302, the system control unit 101 determines whether or not the anterior segment imaging mode changeover switch 8 has been operated.

  If the result of determination in step S302 is that the anterior segment imaging mode switch 8 has been operated (S302 / Y), processing proceeds to step S303. That is, in this case, the process proceeds to step S105 in FIG.

On the other hand, if the result of determination in step S302 is that the anterior segment imaging mode changeover switch 8 has not been operated (S302 / N), the process proceeds to step S304.
In step S304, the system control unit 101 determines whether there is a change in the output of the Z alignment operation amount detection sensor S04.

As a result of the determination in step S304, when there is a change in the output of the Z alignment operation amount detection sensor S04 (S304 / Y), the process proceeds to step S305.
In step S305, the system control unit 101 performs control to drive the Z motor M6. Thereafter, the process returns to step S302.

On the other hand, as a result of the determination in step S304, if there is no change in the output of the Z alignment operation amount detection sensor S04 (S304 / N), the process proceeds to step S306.
In step S306, the system control unit 101 determines whether there is a change in the output of the X alignment operation amount detection sensor S05.

As a result of the determination in step S306, when there is a change in the output of the X alignment operation amount detection sensor S05 (S306 / Y), the process proceeds to step S307.
In step S307, the system control unit 101 performs control to drive the X motor M5. Thereafter, the process returns to step S302.

On the other hand, as a result of the determination in step S306, if there is no change in the output of the X alignment operation amount detection sensor S05 (S306 / N), the process proceeds to step S308.
In step S308, the system control unit 101 determines whether there is a change in the output of the Y alignment operation amount detection sensor S03.

As a result of the determination in step S308, if there is a change in the output of the Y alignment operation amount detection sensor S03 (S308 / Y), the process proceeds to step S309.
In step S309, the system control unit 101 performs control to drive the Y motor M7. Thereafter, the process returns to step S302.

On the other hand, as a result of the determination in step S308, if there is no change in the output of the Y alignment operation amount detection sensor S03 (S308 / N), the process proceeds to step S310.
In step S310, the system control unit 101 determines whether there is a change in the output of the focus operation amount detection sensor S06.

If the result of determination in step S310 is that there is a change in the output of the focus operation amount detection sensor S06 (S310 / Y), processing proceeds to step S311.
In step S311, the system control unit 101 performs control to drive the focus lens drive motor M4, and performs control to adjust the position of the focus lens 612 that is a focusing unit along the optical axis. This step S311 is a case where focus adjustment is performed in anterior segment imaging in which the anterior segment of the eye E is imaged. At this time, the system control unit 101 does not drive the movable unit 3 to perform the optometry unit. In a state where 6 is fixed, control for adjusting the position of the focus lens 612 along the optical axis is performed. Thereafter, the process returns to step S302.

On the other hand, if it is determined in step S310 that the output of the focus operation amount detection sensor S06 has not changed (S310 / N), the process proceeds to step S312.
In step S312, the system control unit 101 determines whether the photographing switch 43 has been operated. If the result of this determination is that the shooting switch 43 has not been operated (S312 / N), processing returns to step S302.

On the other hand, if the result of determination in step S312 is that the shooting switch 43 has been operated (S312 / Y), processing proceeds to step S313.
In step S313, the system control unit 101 performs control to record an image related to the eyelid E4 obtained by the image sensor 613 on a recording medium (not shown).

  Thereafter, in step S314, the system control unit 101 ends the process of the flowchart of FIG.

  Next, the flowchart of FIG. 8 will be described. Specifically, FIG. 8 is a flowchart of the stage drive iris imaging mode.

  In step S401, the system control unit 101 starts the process of the flowchart of FIG.

  In step S <b> 402, the system control unit 101 determines whether or not the anterior segment imaging mode changeover switch 8 has been operated.

  If the result of determination in step S402 is that the anterior segment imaging mode changeover switch 8 has been operated (S402 / Y), processing proceeds to step S403. That is, in this case, the process shifts to step S201 in FIG. 6 in order to shift to the iris photographing mode.

On the other hand, if the result of determination in step S402 is that the anterior segment imaging mode changeover switch 8 has not been operated (S402 / N), the process proceeds to step S404.
In step S404, the system control unit 101 determines whether there is a change in the output of the Z alignment operation amount detection sensor S04.

As a result of the determination in step S404, when there is a change in the output of the Z alignment operation amount detection sensor S04 (S404 / Y), the process proceeds to step S405.
In step S405, the system control unit 101 performs control to drive the Z motor M6. Then, it returns to step S402.

On the other hand, as a result of the determination in step S404, if there is no change in the output of the Z alignment operation amount detection sensor S04 (S404 / N), the process proceeds to step S406.
In step S406, the system control unit 101 determines whether there is a change in the output of the X alignment operation amount detection sensor S05.

As a result of the determination in step S406, if there is a change in the output of the X alignment operation amount detection sensor S05 (S406 / Y), the process proceeds to step S407.
In step S407, the system control unit 101 performs control to drive the X motor M5. Then, it returns to step S402.

On the other hand, as a result of the determination in step S406, if there is no change in the output of the X alignment operation amount detection sensor S05 (S406 / N), the process proceeds to step S408.
In step S408, the system control unit 101 determines whether there is a change in the output of the Y alignment operation amount detection sensor S03.

As a result of the determination in step S408, if there is a change in the output of the Y alignment operation amount detection sensor S03 (S408 / Y), the process proceeds to step S409.
In step S409, the system control unit 101 performs control to drive the Y motor M7. Then, it returns to step S402.

On the other hand, as a result of the determination in step S408, if there is no change in the output of the Y alignment operation amount detection sensor S03 (S408 / N), the process proceeds to step S410.
In step S410, the system control unit 101 determines whether there is a change in the output of the focus operation amount detection sensor S06.

As a result of the determination in step S410, if there is a change in the output of the focus operation amount detection sensor S06 (S410 / Y), the process proceeds to step S411.
In step S411, the system control unit 101 performs control to drive the focus lens drive motor M4, and performs control to adjust the position of the focus lens 612 that is a focusing unit along the optical axis. This step S411 is a case where focus adjustment is performed in anterior segment imaging for imaging the anterior segment of the eye E. At this time, the system control unit 101 does not drive the movable unit 3 to perform the optometry unit. In a state where 6 is fixed, control for adjusting the position of the focus lens 612 along the optical axis is performed. Then, it returns to step S402.

On the other hand, if the result of determination in step S410 is that there is no change in the output of the focus operation amount detection sensor S06 (S410 / N), processing proceeds to step S412.
In step S412, the system control unit 101 determines whether the photographing switch 43 has been operated. If the result of this determination is that the shooting switch 43 has not been operated (S412 / N), processing returns to step S402.

On the other hand, if the result of determination in step S412 is that the shooting switch 43 has been operated (S412 / Y), processing proceeds to step S413.
In step S413, the system control unit 101 performs control to record an image related to the iris E2 obtained by the image sensor 613 on a recording medium (not shown).

  Thereafter, in step S414, the system control unit 101 ends the process of the flowchart of FIG.

The ophthalmologic apparatus 100 according to the present embodiment includes an anterior ocular segment illumination light source 615 that illuminates the anterior segment of the eye E to be examined with light, and a focus lens 612 that is a focusing unit for focusing on the subject E. A housing including an image sensor 613 that receives the reflected light of the light from the eye E via the focus lens 612 and images the eye E, an anterior ocular segment illumination light source 615, the focus lens 612, and the image sensor 613. The movable unit 3 that drives the optometry unit 6 with respect to the eye E and the focus adjustment in the anterior segment imaging for imaging the anterior segment of the eye E without being driven by the movable unit 3 A system control unit 101 that performs control to adjust the position of the focus lens 612 along the optical axis while the optometry unit 6 is fixed is provided. Specifically, the system control unit 101 drives the housing (optometry unit 6) by the movable unit 3 in accordance with an instruction from the alignment operation member 4 that is an operation unit during focus adjustment in anterior segment imaging. Instead, control is performed to adjust the position of the focus lens 612 along the optical axis.
According to this configuration, since the control of adjusting the position of the focus lens 612 is performed with the optometry unit 6 fixed in the focus adjustment in the anterior segment imaging, the anterior segment imaging is performed. Appropriate focus adjustment can be performed without changing the illumination state of the eye to be examined. This makes it possible to realize appropriate anterior segment imaging.

(Other embodiments)
The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.
This program and a computer-readable storage medium storing the program are included in the present invention.

  Note that the above-described embodiments of the present invention are merely examples of implementation in practicing the present invention, and the technical scope of the present invention should not be construed as being limited thereto. It is. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features thereof.

1: fixed part, 2: chin receiving part 2, 3: movable part, 4: alignment operation member, 5: focus operation member, 6: optometry part, 612: focus lens, 613: imaging element, 615a, 615b: front Ocular illumination light source, 7: display unit, 8: anterior ocular segment imaging mode switch, 100: ophthalmologic apparatus, E: eye to be examined

Claims (17)

An anterior segment illumination means for illuminating the anterior segment of the eye to be examined with light;
Focusing means for focusing on the eye to be examined;
Imaging means for receiving the reflected light of the light from the eye to be examined through the focusing means, and imaging the eye to be examined;
Driving means for driving a housing including the anterior ocular segment illumination means, the focusing means, and the imaging means with respect to the eye to be examined;
Operating means for instructing driving by the driving means;
When the focus adjustment is performed in the anterior segment imaging for imaging the anterior segment, the position of the focusing unit is set to the optical axis without driving the casing by the driving unit according to an instruction from the operation unit. Control means for performing control to adjust along,
An ophthalmologic apparatus comprising: Further comprising designation means for designating an imaging region of the eye to be examined;
Before the focus adjustment, the control means drives the housing to a position corresponding to the imaging region designated by the designation means to fix the housing to the position, and then performs the focus adjustment. The ophthalmic apparatus according to claim 1, further comprising a control for adjusting a position of the focusing unit along an optical axis. As the imaging region in the anterior eye portion of the eye to be examined, eyelids and irises are included,
When the imaging part designated by the designation means is a wrinkle, the control means is positioned farther from the eye to be examined than the position when the iris is designated as the imaging part by the designation means before the focus adjustment. The housing is driven to fix the housing to the position, and then the focus is adjusted by adjusting the position of the focusing means along the optical axis. Item 3. The ophthalmic apparatus according to Item 2. As the imaging region in the anterior eye portion of the eye to be examined, eyelids and irises are included,
When the imaging part specified by the specifying means is an iris, the control means is a position closer to the eye to be examined than the position when the eyelid is specified as the imaging part by the specifying means before the focus adjustment. The housing is driven to fix the housing to the position, and then the focus is adjusted by adjusting the position of the focusing means along the optical axis. Item 3. The ophthalmic apparatus according to Item 2.   When the imaging region designated by the designation unit is the fundus, the control unit drives the case to a position corresponding to the fundus determined in advance before focusing, and moves the case 3. The ophthalmologic apparatus according to claim 2, wherein control is performed to adjust the position of the focusing means along the optical axis when the focus is fixed and the focus is adjusted thereafter.   The control means adjusts the position of the focusing means according to the operation amount of the operation means without driving the housing by the drive means according to an instruction of the operation means during the focus adjustment. The ophthalmologic apparatus according to claim 1, wherein control for adjustment along the optical axis is performed. An anterior segment illumination means for illuminating the anterior segment of the eye to be examined with light;
Focusing means for focusing on the eye to be examined;
Imaging means for receiving the reflected light of the light from the eye to be examined through the focusing means, and imaging the eye to be examined;
Driving means for driving a housing including the anterior ocular segment illumination means, the focusing means, and the imaging means with respect to the eye to be examined;
During focus adjustment for anterior segment imaging for imaging the anterior segment, the position of the focusing unit is adjusted along the optical axis in a state where the casing is fixed without being driven by the driving unit. Control means for controlling;
An ophthalmologic apparatus comprising:   The ophthalmologic apparatus according to claim 1, wherein the housing further includes fundus illumination means for illuminating the fundus of the eye to be examined with light. An anterior ocular segment illumination means for illuminating the anterior ocular segment of the eye to be examined with light; a focusing means for focusing on the eye to be examined; and a focusing means for reflecting light reflected from the eye to be examined. Receiving means for imaging the eye to be examined, driving means for driving the anterior eye part illumination means, the focusing means and the imaging means with respect to the eye to be examined, and the driving means A control method for an ophthalmologic apparatus comprising an operation means for instructing driving by
When the focus adjustment is performed in the anterior segment imaging for imaging the anterior segment, the position of the focusing unit is set to the optical axis without driving the casing by the driving unit according to an instruction from the operation unit. A control method for an ophthalmologic apparatus, comprising: a control step for performing control to be adjusted along the line. The ophthalmologic apparatus further comprises designation means for designating an imaging region of the eye to be examined.
In the control step, before the focus adjustment, the housing is driven to a position corresponding to the imaging region designated by the designation means to fix the housing to the position, and then the focus adjustment is performed. The method for controlling an ophthalmologic apparatus according to claim 9, further comprising a control for adjusting a position of the focusing unit along an optical axis. As the imaging region in the anterior eye portion of the eye to be examined, eyelids and irises are included,
In the control step, when the imaging part designated by the designation unit is a wrinkle, a position farther from the eye to be examined than the position when the iris is designated as the imaging part by the designation unit before the focus adjustment. The housing is driven to fix the housing to the position, and then the focus is adjusted by adjusting the position of the focusing means along the optical axis. Item 15. A method for controlling an ophthalmic apparatus according to Item 10. As the imaging region in the anterior eye portion of the eye to be examined, eyelids and irises are included,
In the control step, when the imaging region designated by the designation unit is an iris, a position closer to the eye to be examined than the position when the eyelid is designated as the imaging region by the designation unit before the focus adjustment. The housing is driven to fix the housing to the position, and then the focus is adjusted by adjusting the position of the focusing means along the optical axis. Item 15. A method for controlling an ophthalmic apparatus according to Item 10.   In the control step, when the imaging region designated by the designation means is the fundus, the housing is driven to a position corresponding to the fundus determined in advance before focus adjustment. The method for controlling an ophthalmologic apparatus according to claim 10, wherein the control is performed such that the position of the focusing unit is adjusted along the optical axis when the focus is fixed and the focus is adjusted thereafter.   In the control step, the focus unit is moved according to the operation amount of the operation unit without driving the housing by the drive unit according to the instruction of the operation unit during the focus adjustment. The method for controlling an ophthalmologic apparatus according to claim 9, wherein control for adjustment along the optical axis is performed. An anterior ocular segment illumination means for illuminating the anterior ocular segment of the eye to be examined with light; a focusing means for focusing on the eye to be examined; and a focusing means for reflecting light reflected from the eye to be examined. An ophthalmologic apparatus comprising: an imaging unit that receives light via the imaging unit and images the eye to be inspected; and a driving unit that drives a housing including the anterior eye part illumination unit, the focusing unit, and the imaging unit with respect to the eye to be examined Control method,
During focus adjustment for anterior segment imaging for imaging the anterior segment, the position of the focusing unit is adjusted along the optical axis in a state where the casing is fixed without being driven by the driving unit. A control method for an ophthalmologic apparatus, comprising a control step for performing control.   The method of controlling an ophthalmologic apparatus according to claim 9, wherein the housing further includes fundus illumination means for illuminating the fundus of the eye to be examined with light.   The program for making a computer perform the control method of the ophthalmologic apparatus of any one of Claims 9 thru | or 16.

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