JP7344055B2 - Ophthalmological equipment and method for controlling ophthalmological equipment - Google Patents

Description

The present invention relates to an ophthalmological apparatus that acquires ocular characteristics of an eye to be examined, and a method for controlling the ophthalmological apparatus.

In ophthalmology, ophthalmology equipment is used to acquire various ocular characteristics (measurement, photography, observation, etc.) of the eye to be examined, such as refractive power, intraocular pressure, number of corneal endothelial cells, corneal shape, fundus observation image, and fundus tomographic image. This is done by In this case, positioning of the optical system of the ophthalmological apparatus with respect to the eye to be examined, that is, alignment, is extremely important from the viewpoint of accuracy, accuracy, image quality, etc. of the acquired eye characteristics. For this reason, ophthalmological equipment uses so-called full-auto alignment, which automatically performs alignment by detecting the relative positional relationship between the eye to be examined and the optical system and moving the optical system relative to the eye to be examined based on this detection result. (hereinafter simply referred to as auto-alignment) is usually performed.

For example, in Patent Document 1 and Patent Document 2, two cameras constituting a stereo camera simultaneously photograph the anterior segment of the subject's eye from different directions, and the images obtained by each camera are analyzed. An ophthalmological apparatus is described that performs automatic alignment of an optical system with respect to the eye to be examined based on the three-dimensional position of the eye. Furthermore, in Patent Document 3, three images of the eye to be examined are obtained by photographing the eye to be examined with a camera at a plurality of different locations while changing the imaging position of the monocular camera, and analyzing the captured images of the eye at each location. An ophthalmological apparatus is described that performs automatic alignment of an optical system with respect to an eye to be examined based on dimensional position.

Japanese Patent Application Publication No. 2013-248376 Japanese Patent Application Publication No. 2014-200678 Japanese Patent Application Publication No. 2016-221075

By the way, when auto-alignment is performed in the ophthalmological apparatus described in Patent Document 1 and Patent Document 2, three images of the same subject's eye (one eye) to be measured are determined based on images simultaneously captured by each camera. Get dimensional position. In this case, images of the same eye to be examined must be included in the images taken by each camera. At this time, if the position of the optical system is significantly shifted from the eye to be examined (the face of the patient), there is a risk that at least one of the images taken by each camera will not contain an image of the same eye to be examined. There is. As a result, acquisition of the three-dimensional position of the eye to be examined fails, and the examiner is required to perform alignment manually.

On the other hand, when the monocular camera is moved and the subject's eye is photographed at multiple locations, as in the ophthalmological apparatus described in Patent Document 3, rotation of the subject's eye and slight facial movements that occur while the monocular camera is moving The three-dimensional position of the eye to be examined cannot be accurately measured. As a result, in the ophthalmological apparatus described in Patent Document 3, it is difficult to perform highly accurate autoalignment.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an ophthalmologic apparatus and a control method for an ophthalmologic apparatus that can both improve alignment workability and increase accuracy.

An ophthalmological apparatus for achieving the object of the present invention includes an optical system for acquiring eye characteristics of an eye to be examined of a subject, and a relative movement mechanism for moving the other relative to one of the eye to be examined and the optical system. A drive control unit that controls driving, a plurality of imaging units that photograph the face of the subject from different directions, and a photography range control unit that controls a photography range in which the plurality of photography units photograph the face, and a photographing range control section that includes both eyes of a face within the photographing range of two or more photographing sections; a binocular photographing control section that causes each photographing section to perform photographing of both eyes including both eyes within the photographing range; A binocular detection unit detects both eyes from each binocular image based on the binocular images taken for each binocular image, and a drive control unit controls the drive control unit based on the detection results of the binocular detection unit. and a coarse alignment control section that performs rough alignment of the optical system with respect to the eye to be examined by driving the relative movement mechanism through the eye.

According to this ophthalmological apparatus, since both eyes can be included in the imaging range of at least two or more imaging units, both eyes are detected from the captured images of each of at least two or more imaging units and rough alignment is automatically performed. can be executed. As a result, even if a positional deviation occurs between the eye to be examined and the optical system, precise alignment can be performed after rough alignment.

In the ophthalmological apparatus according to another aspect of the present invention, there is provided a pre-photographing control unit that performs pre-photographing of a face for each photographing unit, and a pre-photographing image for each pre-photographing image based on the pre-photographing image of the pre-photographing for each photographing unit. a pre-examined eye detection unit that detects the examinee's eye from the target eye, and the imaging range control unit determines that the number of pre-exposed images including the same examinee's eye is one or less based on the detection result of the pre-examined eye detection unit. In this case, both eyes are included in the photographing range of two or more photographing units. As a result, both eyes can be included in the imaging range of at least two or more imaging units, so it is possible to detect both eyes from the captured images of at least two or more imaging units and automatically perform rough alignment. can.

In the ophthalmological apparatus according to another aspect of the present invention, there is provided an eye imaging control unit that causes each imaging unit to perform imaging of the eye to be examined when the rough alignment is completed; and an eye imaging control unit that causes each imaging unit to perform imaging of the eye to be examined; an eye detection unit that detects the eye to be examined from each image of the eye to be examined based on the image taken by the eye to be examined, and a relative position detection unit that detects the relative position of the eye to be examined with respect to the optical system based on the detection results of the eye detection unit. Based on the detection result of the part and the relative position detection part, the relative movement mechanism is driven via the drive control part to perform precise alignment of the optical system with respect to the eye to be examined, which is more accurate than coarse alignment. A precision alignment control section. Thereby, alignment of the optical system with respect to the eye to be examined can be performed with high precision.

In the ophthalmological apparatus according to another aspect of the present invention, there is provided a pre-photographing control unit that performs pre-photographing of a face for each photographing unit, and a pre-photographing image for each pre-photographing image based on the pre-photographing image of the pre-photographing for each photographing unit. a pre-test eye detection unit that detects the test eye from the pre-test eye detection unit, and if the number of pre-shot images including the same test eye is two or more based on the detection result of the pre-test eye detection unit, shooting range control is provided. The relative position detection section detects the relative position of the eye to be examined based on the detection result of the preliminary eye detection section. In this case, coarse alignment can be omitted and precise alignment can be performed, so alignment workability can be improved.

In an ophthalmological apparatus according to another aspect of the present invention, the imaging range control section is a wide-angle control section that controls the angle of view for each imaging section, and the imaging range control section is a wide-angle control section that controls the angle of view for each imaging section, and This is a wide-angle control section that changes the angle of view of the photographing section to the wide-angle side until both eyes are included within the photographing range. This makes it possible to include both eyes of the subject's eye within the imaging range of at least two or more imaging units, so both eyes are detected from the captured images of at least two or more imaging units and rough alignment is automatically performed. can do.

In the ophthalmological apparatus according to another aspect of the present invention, when coarse alignment is completed, the eye to be examined control unit causes each imaging unit to perform imaging of the eye to be examined; an eye-to-be-examined detection unit that detects the eye to be examined from each eye-to-be-examined image, and a relative position detection unit that detects the relative position of the eye to the optical system based on the detection results of the eye-to-be-examined detection unit. and, based on the detection result of the relative position detection section, the relative movement mechanism is driven via the drive control section to perform precision alignment of the optical system with respect to the eye to be examined, which is more precise than coarse alignment. The apparatus includes an alignment control section and a narrow-angle control section that changes the angle of view of each imaging section to the narrow-angle side between the completion of rough alignment and the start of imaging of the eye to be examined. Thereby, alignment of the optical system with respect to the eye to be examined can be performed with high precision.

An ophthalmological apparatus according to another aspect of the present invention, which includes a plurality of multi-lens cameras each having a plurality of photographing sections, each of which has a different angle of view of the photographing section; The range control unit selects a multi-eye camera that includes both eyes within the shooting range of two or more of the shooting units from among the plurality of multi-eye cameras, and the binocular shooting control unit is selected by the shooting range control unit. Perform binocular photography using a multi-lens camera. Thereby, it is possible to detect both eyes from images taken by at least two or more imaging units and automatically perform rough alignment.

In the ophthalmological apparatus according to another aspect of the present invention, the imaging range control unit drives the relative movement mechanism via the drive control unit to move one side to the other within the imaging range of two or more imaging units. Move it relative to the position that includes the eyes. Thereby, it is possible to detect both eyes from images taken by at least two or more imaging units and automatically perform rough alignment.

In the ophthalmological apparatus according to another aspect of the present invention, the photographing range control section drives the relative movement mechanism via the drive control section, so that one of the relative movement mechanisms moves at least a working distance between the eye to be examined and the optical system. relative movement in the direction that increases. Thereby, both eyes of the subject's eyes can be included within the photographing range of at least two or more photographing units.

In the ophthalmological apparatus according to another aspect of the present invention, faces are simultaneously photographed by each photographing section.

An ophthalmologic apparatus according to another aspect of the present invention includes an interpupillary distance calculation section that calculates the interpupillary distance of both eyes based on the detection results of the binocular detection sections. Thereby, the eye to be measured to be measured by the optical system can be switched using the calculation result of the interpupillary distance.

The ophthalmological apparatus according to another aspect of the present invention includes a display control unit that displays binocular images on a display unit when the binocular detection unit fails to detect both eyes; an operation reception unit that accepts a designation operation for specifying at least both eyes for each binocular image on the display surface of the display unit when the binocular image is displayed on the display unit, the coarse alignment control unit When the specified operation is accepted by the operation receiving section, the relative movement mechanism is driven via the drive control section based on the specified operation to perform rough alignment. Thereby, even if the subject's eye detection unit fails to detect both eyes in the first repetitive control, coarse alignment can be performed.

In the ophthalmological apparatus according to another aspect of the present invention, the drive control unit includes at least one of, as the relative movement mechanism, a subject movement mechanism that moves the subject or the face, and an optical system movement mechanism that moves the optical system. Controls one drive.

A method for controlling an ophthalmological apparatus to achieve the object of the present invention includes an optical system for acquiring eye characteristics of an eye to be examined of a subject, and a relative movement for moving one of the eye to be examined and the optical system relative to the other. In a method for controlling an ophthalmological apparatus, the method includes a drive control unit that controls driving of a moving mechanism, and a plurality of photographing units that photograph a subject's face from different directions, wherein the photographing range in which the plurality of photographing units photograph the face. a photographing range control step for controlling the photographing range of the two or more photographing units, including both eyes of the face within the photographing range of the two or more photographing units; A binocular photography control step for executing photography, and a binocular photography control step for detecting both eyes from the binocular photography image for each binocular photography image based on the binocular photography images taken by each photography unit in the binocular photography control step. The method includes a detection step and a coarse alignment control step of driving a relative movement mechanism via a drive control section based on the detection results of the binocular detection step to perform rough alignment of the optical system with respect to the subject's eyes.

In the method for controlling an ophthalmological apparatus according to another aspect of the present invention, when rough alignment is completed, a subject eye photography control step of performing photography of the subject's eye for each imaging unit; An eye to be examined step detects the eye to be examined from each eye to be examined image based on the photographed image, and a relative position of the eye to be examined relative to the optical system is detected based on the detection result of the eye to be examined step. Based on the detection results of the position detection step and the relative position detection step, the relative movement mechanism is driven via the drive control unit to achieve precise alignment of the optical system with respect to the eye to be examined, which is more accurate than coarse alignment. and a precision alignment control step.

The present invention can both improve alignment workability and increase precision.

FIG. 1 is a schematic diagram of an ophthalmologic apparatus according to a first embodiment. It is a schematic diagram of a stereo camera. FIG. 3 is an explanatory diagram for explaining control of the angle of view of a camera by a zoom lens optical system. FIG. 2 is a functional block diagram of a control device according to a first embodiment. FIG. 6 is an explanatory diagram showing an example of captured images for each camera before and after the viewing angle is switched by the wide-angle control unit. FIG. 6 is an explanatory diagram for explaining changes in the angle of view of the camera before and after switching the angle of view by the wide-angle control unit. FIG. 7 is an explanatory diagram for explaining a modification of the wide angle of view of the camera. FIG. 4 is an explanatory diagram for explaining the positional relationship between the eye to be examined and the measurement optical system 28 before and after rough alignment by the rough alignment control unit. Reference numeral 9A is an explanatory diagram showing an example of a binocular photographed image for each camera after rough alignment, and reference numeral 9B is an explanatory diagram showing an example of a binocular photographed image for each camera after rough alignment. It is a figure showing an example of an image. FIG. 3 is an explanatory diagram for explaining calculation of an interpupillary distance by an interpupillary distance calculation section. FIG. 3 is an explanatory diagram for explaining switching of the eye to be examined by the measurement optical system. It is a flowchart which shows the flow of the measurement process of the eye refractive power of the eye to be examined by the ophthalmological apparatus of 1st Embodiment, especially the auto alignment process. It is an explanatory view for explaining a pair of stereo cameras corresponding to a first modification. It is an explanatory view for explaining a pair of stereo cameras corresponding to a second modification. It is an explanatory view for explaining two types of stereo cameras corresponding to a third modification. FIG. 2 is a functional block diagram of a control device for an ophthalmologic apparatus according to a second embodiment. FIG. 6 is an explanatory diagram for explaining reception of an operation for specifying both eyes of the subject's eyes, etc., by the operation reception unit. It is a flowchart which shows the flow of the measurement process of the eye refractive power of the eye to be examined by the ophthalmological apparatus of 2nd Embodiment, especially the rough alignment process. It is a functional block diagram of a control device of an ophthalmologic apparatus of a third embodiment. FIG. 3 is an explanatory diagram for explaining drive control of an XYZ drive mechanism by a photographing range control section. It is a flowchart which shows the flow of the measurement process of the eye refractive power of the eye to be examined by the ophthalmological apparatus of 3rd Embodiment, especially the rough alignment process. It is an explanatory view for explaining a modification of an ophthalmologic apparatus of a third embodiment. It is an explanatory view for explaining an effect of a modification of a 3rd embodiment.

[First embodiment]
<Configuration of ophthalmological device>
FIG. 1 is a schematic diagram of an ophthalmologic apparatus 10 according to a first embodiment of the present invention. The ophthalmologic apparatus 10 measures, observes, and photographs various eye characteristics of the eye E of the subject H (see FIG. 2) (hereinafter simply referred to as "measurement"). The ophthalmologic apparatus 10 includes a fundus camera, an OCT (Optical Coherence Tomography), an SLO (Scanning Laser Ophthalmoscope), an axial length meter, a slit lamp, a refractometer, a keratometer, an autokeratorefractometer, a tonometer, a specular microscope, and Examples include these multifunction devices. In addition, in this embodiment, the ophthalmological apparatus 10 which measures the eye refractive power of the eye E to be examined as an eye characteristic of the eye E to be examined will be described as an example.

The X-axis direction in the figure is the left-right direction (interpupillary direction of the subject's eye E) with respect to the subject H (see Figure 2), the Y-axis direction is the up-down direction, and the Z-axis direction is the direction of the subject's eye E. This is the front-rear direction (also referred to as the working distance direction) parallel to the front direction approaching H and the rear direction moving away from the subject H.

As shown in FIG. 1, the ophthalmologic apparatus 10 includes a base 12, a face support 14, a pedestal 16, and a measurement head 18.

The base 12 is placed on the table 20. The position of this table 20 is adjustable in the Y-axis direction under the control of a control device 30, which will be described later. Further, a chair (not shown) is arranged on the front side of the table 20 in the Z-axis direction, and the height of the seat of this chair is also adjusted in the Y-axis direction under the control of the control device 30. It is possible. Thereby, by adjusting the heights of the table 20 and the seat surfaces of the chair according to the physique of the subject H, it is possible to adjust the height position of the subject's eye E and the ophthalmological apparatus 10 in the Y-axis direction. Note that the table 20 constitutes a part of the optical system moving mechanism of the present invention, and the chair constitutes a part of the subject moving mechanism of the present invention.

The face support part 14 constitutes a part of the subject moving mechanism of the present invention, and is provided integrally with the base 12 at a position on the front side of the measurement head 18 in the Z-axis direction. This face support part 14 has a chin rest 14a and a forehead rest 14b whose position can be adjusted in the Y-axis direction, and supports the face Hf of the subject H shown in FIG. 2, which will be described later.

Further, inside the face support section 14, a face support section drive mechanism 14c is provided. The face support drive mechanism 14c is a known actuator such as a motor drive mechanism. The face support drive mechanism 14c adjusts the position of the eye E in the Y-axis direction by moving the chin rest 14a and the forehead rest 14b in the Y-axis direction under the control of a control device 30, which will be described later.

The pedestal 16 is provided on the base 12 and is supported by the base 12 so as to be movable in the X-axis direction and the Z-axis direction (front, rear, left and right directions). A measuring head 18 and an operating lever 22 are provided on this pedestal 16. Inside the pedestal 16, there is an XYZ drive mechanism 24 including a horizontal movement mechanism that moves the pedestal 16 in the X-axis direction and the Z-axis direction on the base 12, and a vertical movement mechanism that moves the measurement head 18 in the Y-axis direction. is provided. The XYZ drive mechanism 24 is a known actuator such as a motor drive mechanism, and constitutes a part of the optical system moving mechanism of the present invention.

The operating lever 22 is provided on the pedestal 16 at a position on the rear side of the measuring head 18 in the Z-axis direction, and is operated when moving the measuring head 18 in the XYZ-axis directions. For example, when the operating lever 22 is tilted in the Z-axis direction or the X-axis direction, the measurement head 18 is moved in the Z-axis direction or the X-axis direction by the XYZ drive mechanism 24. Furthermore, when the operating lever 22 is rotated about its longitudinal axis, the measuring head 18 is moved in the Y-axis direction by the XYZ drive mechanism 24 in accordance with the direction of the rotational operation. Note that a measurement button for starting the measurement of the eye refractive power of the eye E to be examined by the measurement head 18 is provided at the top of the operation lever 22.

The measurement head 18 is used to measure the eye refractive power of the eye E to be examined. A display section 26 is provided on the rear surface of the measurement head 18 in the Z-axis direction. Further, in the measurement head 18, a measurement optical system 28 (including an image sensor, various light sources, and various drive units) corresponding to the measurement of the eye refractive power of the eye E to be examined, and a control device 30 are provided. There is. Furthermore, an objective lens 28a that constitutes a part of the measurement optical system 28 and a stereo camera 32 are provided on the front surface of the measurement head 18 in the Z-axis direction.

The display unit 26 is, for example, a touch panel type liquid crystal display. This display unit 26 displays photographed images 34 (see FIG. 2) acquired by each stereo camera 32 (described later), measurement results of the eye characteristics of the eye E, and an input screen for performing operations (settings) related to the measurement. Display.

The measurement optical system 28 corresponds to the optical system of the present invention, and irradiates measurement light onto the eye E through the objective lens 28a and receives the return light of the measurement light from the eye E to be examined. The light reception signal is output to the control device 30. Note that the configuration of the measurement optical system 28 is a well-known technique, so a detailed explanation will be omitted here.

The control device 30 centrally controls the operation of each part of the ophthalmological apparatus 10. For example, the control device 30 controls auto-alignment of the measurement optical system 28 (measurement head 18) with respect to the eye E to be examined, controls measurement by the measurement head 18, and calculates the eye refractive power of the eye E to be examined.

<Stereo camera configuration>
FIG. 2 is a schematic diagram of the stereo camera 32. Note that the symbol O1 in the figure is the optical axis of the objective lens 28a (measurement optical system 28), and the symbol O2 is the optical axis of the stereo camera 32 (cameras 32a, 32b). Further, the symbol WD in the figure is the working distance in the Z-axis direction between the objective lens 28a and the eye E to be examined.

As shown in FIG. 2, the stereo camera 32 is used for automatic alignment of the measurement optical system 28 with respect to the eye E to be examined. Since the stereo camera 32 is provided on the measurement head 18, it moves together with the measurement optical system 28 of the measurement head 18. That is, the stereo camera 32 and the measurement optical system 28 are movable together.

The stereo camera 32 includes a pair of left and right cameras 32a and 32b, which correspond to a plurality of photographing units of the present invention. Each camera 32a, 32b is arranged on the front surface of the measurement head 18 in the Z-axis direction so as to sandwich the objective lens 28a from the left and right sides thereof. The cameras 32a and 32b simultaneously photograph the face Hf of the subject H from different directions, in this embodiment from the left and right directions (including substantially simultaneous photographing). Note that the positions of the cameras 32a and 32b can be changed as appropriate.

Each camera 32a, 32b includes a zoom lens optical system 35 and a CMOS (Complementary Metal Oxide Semiconductor) or CCD (Charge Coupled Device) type image pickup element 36.

FIG. 3 is an explanatory diagram for explaining the control of the angle of view of the cameras 32a and 32b by the zoom lens optical system 35. Note that in FIG. 3, the face Hf (object point) is simplified.

As shown in FIG. 3 and already mentioned FIG. move along. As a result, the focal length f between the zoom lens optical system 35 and the image sensor 36 is changed, and the angle of view of each camera 32a, 32b (the angle of view of the photographed image 34 taken by the cameras 32a, 32b, respectively) is changed. It can be changed. As a result, the photographing range (also referred to as photographing area) in which each camera 32a, 32b photographs the face Hf, in other words, the photographing range in which each camera 32a, 32b photographs the face Hf can be changed.

In this embodiment, the angle of view of the cameras 32a and 32b is switched between a narrow angle of view 40A shown by reference numeral 3A in FIG. 3 and a wide angle of view 40B shown by reference numeral 3B in FIG. 3, depending on the type of autoalignment described later.

The narrow angle of view 40A is set to be narrower than the wide angle of view 40B. When the face Hf is photographed by the cameras 32a and 32b with the narrow angle of view 40A, a high-definition photographed image 34 of a narrow range of the face Hf is obtained. On the other hand, the wide angle of view 40B is set to the wider angle side than the narrow angle of view 40A. When the face Hf is photographed by the cameras 32a and 32b with the wide angle of view 40B, a low-definition photographed image 34 of the face Hf and a wide range of its surroundings is obtained.

The image sensor 36 captures the light incident through the zoom lens optical system 35 and outputs a captured image 34 to the control device 30 . As a result, the captured images 34 of each of the cameras 32a and 32b are input to the control device 30. The control device 30 detects the relative position (three-dimensional position) of the eye E to be examined with respect to the measurement optical system 28 for each eye of the eye E based on the images 34 taken by the cameras 32a and 32b, and detects the relative position (three-dimensional position) of the eye E to be examined with respect to the measurement optical system 28 based on the detection result. Auto-alignment between the eye E to be examined and the measurement optical system 28 is performed for each eye of the eye E.

When performing auto-alignment based on images 34 taken by cameras 32a and 32b, both images 34 taken by cameras 32a and 32b must include an image of the same eye E (one eye) to be measured. There is. At this time, the cameras 32a and 32b are respectively photographing the face Hf from the left and right diagonal directions. Therefore, for example, if the positions of the cameras 32a and 32b with respect to the eye E to be examined deviate greatly from the design value (reference value) in the X-axis direction or the Y-axis direction, there will be a difference in the captured image 34 of at least one of the cameras 32a and 32b. There is a possibility that the image of the eye E to be examined is not included. Furthermore, even when the working distance WD is short, there is a possibility that the image of the eye E to be examined is not included in the captured image 34 of at least one of the cameras 32a and 32b.

Therefore, in this embodiment, the face Hf is pre-photographed by the cameras 32a, 32b, and if the image of the eye E to be examined is not included in the image 34 taken by at least one of the cameras 32a, 32b, in other words, the image of the eye E to be measured is When the number of photographed images 34 including the image of the optometry E is one or less, coarse alignment and fine alignment are performed in order as automatic alignment. Further, in this embodiment, when the image of the eye E to be examined is included in the images 34 taken by all the cameras 32a and 32b, that is, when the number of the images 34 including the image of the eye E to be measured is 2. In this case, only precision alignment is performed as auto alignment.

Pre-photography is performed with the angle of view of the cameras 32a and 32b set to the narrow angle of view 40A described above, similar to the precision alignment described later. Based on images 34 taken by the cameras 32a and 32b (hereinafter referred to as pre-photographed images 34a) obtained through preliminary photographing (narrow angle of view 40A), it is determined whether or not to perform rough alignment. Note that the image including the image of the eye E in the pre-photographed image 34a corresponds to a photographed image 34c of the eye to be examined that is photographed by the cameras 32a and 32b in precision alignment, which will be described later.

In the coarse alignment, the face Hf ( Both eyes) are photographed. In the rough alignment, the eye E to be examined and the measurement optical system 28 are roughly aligned based on the images 34 taken by both eyes by the cameras 32a and 32b (hereinafter referred to as the images 34b taken by both eyes). Due to this rough alignment, the eye E to be examined is included within the narrow angle of view 40A of each camera 32a, 32b.

Fine alignment is alignment that is more accurate than coarse alignment. In the precise alignment, the eye E to be measured is photographed with the angle of view of the cameras 32a and 32b set to the narrow angle of view 40A described above. In the precision alignment, the reference position of the eye E (for example, In addition to aligning the corneal apex, etc.) and the optical axis O1 of the measurement optical system 28 in the X-axis direction and the Y-axis direction, the working distance WD is adjusted.

<Configuration of control device of first embodiment>
FIG. 4 is a functional block diagram of the control device 30 of the first embodiment. As shown in FIG. 4, the control device 30 includes an arithmetic circuit including various processors, memories, and the like. Various processors include CPU (Central Processing Unit), GPU (Graphics Processing Unit), ASIC (Application Specific Integrated Circuit), and programmable logic devices [for example, SPLD (Simple Programmable Logic Devices), CPLD (Complex Programmable Logic Device), and FPGA (Field Programmable Gate Arrays)]. Note that the various functions of the control device 30 may be realized by one processor, or may be realized by a plurality of processors of the same type or different types.

The control device 30 also includes a table drive mechanism 44, a chair drive mechanism 46, in addition to the face support drive mechanism 14c, the XYZ drive mechanism 24, the display unit 26, the measurement optical system 28, the stereo camera 32, etc. , an operating section 48, etc. are connected thereto.

The table drive mechanism 44 and chair drive mechanism 46 are various known actuators. The table drive mechanism 44 moves the table 20 in the Y-axis direction, that is, adjusts the position of the table 20 in the Y-axis direction, under the control of the control device 30. The chair drive mechanism 46 adjusts the position in the Y-axis direction of the seat surface of a chair (not shown) on which the subject H sits under the control of the control device 30 .

The operation unit 48 includes the previously described operation lever 22 and the screen of the touch panel display unit 26, and accepts various input operations by the examiner. Note that the operation unit 48 may include a controller, a keyboard, a mouse, etc. (not shown).

The control device 30 reads and executes a program stored in a storage circuit or storage device (not shown), thereby controlling the display control section 50, optical system control section 52, stereo camera control section 54, drive control section 55, and pre-photography. It functions as a control section 56, a preliminary eye detection section 57, a coarse alignment execution section 60, a fine alignment execution section 62, an eye characteristic calculation section 64, and an interpupillary distance calculation section 66. It should be noted that what is described as "unit" of the control device 30 may also be "circuit", "apparatus", or "equipment". That is, what is described as "unit" may be composed of firmware, software, hardware, or a combination thereof.

<Display control section>
The display control unit 50 controls the display by the display unit 26. The display control section 50 causes the display section 26 to display the photographed image 34 inputted from the stereo camera 32, and causes the display section 26 to display the calculation result of the eye refractive power of the eye E to be examined by the eye characteristic calculation section 64, which will be described later. Alternatively, the display section 26 displays an input screen that accepts various operations by the examiner.

<Optical system control section>
The optical system control section 52 controls the measurement optical system 28. The optical system control unit 52 controls the measurement optical system 28 when the above-described precision alignment is completed, or when a measurement start operation is input at the operation unit 48, so that the measurement optical system 28 adjusts the measurement of the eye E to be examined. The acquisition operation of the eye refractive power (eye characteristics) is executed. Specifically, the optical system control unit 52 irradiates the measurement light from the measurement optical system 28 to the eye E to be examined and returns the measurement light from the eye E to the measurement optical system 28 as an operation for acquiring the eye refractive power. receiving light and outputting a light receiving signal.

<Stereo camera control section>
The stereo camera control unit 54 controls the operations of the cameras 32a and 32b of the stereo camera 32, such as photographing and controlling the angle of view. When the stereo camera control unit 54 receives commands from a pre-photography control unit 56, a binocular photography control unit 71, and a subject eye photography control unit 77, which will be described later, the stereo camera 32 captures the face Hf (eyes E, both eyes). (eyes).

Further, the stereo camera control unit 54 sets the angle of view of the cameras 32a and 32b to the narrow angle of view 40A in pre-photography (first time photography) of the face Hf performed under the control of a pre-photography control unit 56, which will be described later. Furthermore, the stereo camera control unit 54 changes the angle of view of the cameras 32a and 32b into a wide image during binocular photography (second photography) of the face Hf (both eyes) performed under the control of the binocular photography control unit 72, which will be described later. Set to corner 40B. Furthermore, the stereo camera control unit 54 controls the angle of view of the cameras 32a and 32b during the subject's eye photography (third time photography) of the face Hf (the subject's eye E), which is performed under the control of the subject's eye photography control unit 78, which will be described later. Set the narrow angle of view to 40A.

The photographed images 34 (pre-photographed image 34a, binocular photographic image 34b, and subject eye photographic image 34c) photographed by the cameras 32a and 32b are sent to a pre-examined eye detection section 57, which will be described later, via a stereo camera control section 54. The signal is output to either the binocular detection section 73 or the subject's eye detection section 79.

<Drive control section>
The drive control unit 55 controls the movement of the measurement head 18 in the XYZ axis directions by the XYZ drive mechanism 24, the movement of the chin rest 14a etc. in the Y axis direction by the face support part drive mechanism 14c, and the movement of the table 20 in the Y axis direction by the table drive mechanism 44. It controls the movement in the axial direction and the movement in the Y-axis direction of a chair (seat surface) (not shown) by the chair drive mechanism 46.

<Pre-shooting control section>
The pre-imaging control section 56 is activated when a measurement start operation is input through the operation section 48 . This pre-shooting control unit 56 drives the zoom lens optical system 35 of the cameras 32a, 32b via the stereo camera control unit 54, and changes the angle of view of the cameras 32a, 32b to a narrow angle of view 40A (see reference numeral 3A in FIG. 3). ). Further, the pre-photography control section 56 causes the stereo camera control section 54 to execute pre-photography of the face Hf using the cameras 32a and 32b set to the narrow angle of view 40A.

Pre-imaging is an imaging performed to check whether the same eye E to be measured is included within the narrow angle of view 40A of the cameras 32a and 32b, that is, a rough imaging performed by the rough alignment execution unit 60, which will be described later. This is a photograph used to determine whether or not to perform alignment. Further, the preliminary photographing is performed under the same conditions (settings) as the photographing of the eye to be examined performed during precision alignment, which will be described later, except for the positional relationship between the cameras 32a, 32b and the eye to be examined E. A pre-photographed image 34a of the face Hf pre-photographed by the cameras 32a and 32b is outputted to the preliminary eye detection section 57 via the stereo camera control section 54.

<Pre-test eye detection section>
The pre-examined eye detection section 57 operates when the pre-photographed images 34a for each of the cameras 32a and 32b are input from the pre-photographing control section 56. The pre-test eye detection unit 57 performs image analysis based on the pre-photographed images 34a for each of the cameras 32a and 32b, and detects the test eye E to be measured from within the pre-photographed image 34a for each pre-photographed image 34a. Detection of presence/absence and position of E). Note that since the method of detecting the eye E from within the image by image analysis is a known technique, a detailed explanation thereof will be omitted here. Then, the pre-examined eye detection section 57 outputs the detection result of the examined eye E for each pre-photographed image 34a to the coarse alignment execution section 60 and the fine alignment execution section 62, respectively.

<Coarse alignment execution unit>
Based on the detection result of the pre-tested eye detection unit 57, the rough alignment execution unit 60 determines whether each of the pre-photographed images 34a of each of the cameras 32a and 32b is an image containing the subject eye E to be measured, that is, the test-eye photographed image 34c. If the number of photographed images 34c of the eye to be examined is 1 or less, it is activated to perform rough alignment. The coarse alignment execution section 60 functions as a wide-angle control section 70 , a binocular photography control section 72 , a binocular detection section 73 , and a coarse alignment control section 74 .

FIG. 5 is an explanatory diagram showing an example of images 34 taken by the cameras 32a and 32b before and after the viewing angle is switched by the wide-angle control unit 70. FIG. 6 is an explanatory diagram for explaining changes in the view angles of the cameras 32a and 32b before and after the view angles are switched by the wide-angle control unit 70. Here, reference numeral 5A in FIG. 5 and reference numeral 6A in FIG. 6 are examples of the captured image 34 and the angle of view for each of the cameras 32a and 32b before the angle of view is switched by the wide-angle control unit 70. Further, reference numeral 5B in FIG. 5 and reference numeral 6B in FIG. 6 are examples of the captured image 34 and the angle of view for each of the cameras 32a and 32b after the angle of view has been switched by the wide-angle control unit 70. In addition, in FIGS. 5 and 6, the right eye of the subject H (indicated by a dot in FIG. 6) is the subject's eye E.

As shown in FIGS. 5, 6, and the previously described FIG. 4, the wide-angle control section 70 corresponds to the photographing range control section of the present invention. The wide-angle control unit 70 drives the zoom lens optical system 35 of the cameras 32a, 32b via the stereo camera control unit 54 to change the angle of view of the cameras 32a, 32b to the narrow angle of view 40A (see FIG. 6). 6A) to the wide-angle side 40B (see 6B in FIG. 6).

Here, the wide angle of view 40B is a value that allows both eyes of the face Hf to be included within the angle of view of the cameras 32a and 32b even if the positional deviation between the eye E and the measurement optical system 28 is large in each direction of the XYZ axes. is set to . In addition, since the subject H sits on the front side of the ophthalmological apparatus 10 and his face Hf is supported by the face support part 14, the range where both eyes are present can be predicted. Therefore, the wide angle of view 40B is determined in advance by conducting experiments, simulations, or the like. Thereby, by switching the angle of view of the cameras 32a, 32b to the wide angle of view 40B, it is possible to include both eyes within the photographing range of the cameras 32a, 32b.

FIG. 7 is an explanatory diagram for explaining a modification of the wide angle of view 40B of the cameras 32a and 32b. Note that 7A in FIG. 7 is an example of an image 34 taken by each of the cameras 32a and 32b before the angle of view is switched by the wide-angle control unit 70, and 7B in FIG. This is an example of images 34 taken by the subsequent cameras 32a and 32b.

As shown in FIG. 7, the wide angle of view 40B may be set to a wider angle side than the states shown by reference numeral 5B in FIG. 5 and reference numeral 6B in FIG. 6, which have already been described. The wide angle of view 40B in this case is an angle of view in which both eyes of the face Hf, the chin of the face Hf, and the periphery thereof are included within the photographing range of each of the cameras 32a and 32b. This makes it possible to determine whether or not the face Hf is supported by the face support section 14 based on the photographed image 34 taken together with the cameras 32a and 32b in the first repetitive control.

When the wide-angle control unit 70 changes the angle of view of the cameras 32a and 32b, the binocular photography control unit 72 controls the stereo camera control unit 54 so that the cameras 32a and 32b can capture both eyes of the face Hf. Execute a certain binocular photography. As a result, binocular images 34b obtained by capturing both eyes with each of the cameras 32a and 32b are output to the binocular detection unit 73.

The binocular detection unit 73 performs image analysis based on the binocular captured images 34b input for each of the cameras 32a and 32b, in the same way as the pre-examined eye detection unit 57 described above, and analyzes the binocular captured images 34b for each binocular captured image 34b. Detection of both eyes of the face Hf (detection of the positions of both eyes, etc.) is performed from within the eye photographed image 34b. Then, the binocular detection section 73 outputs the detection results of both eyes for each binocular photographed image 34b to the coarse alignment control section 74.

Note that detection of both eyes by the binocular detection unit 73 is performed based on a low-definition binocular photographed image 34b of the periphery of both eyes of the face Hf photographed by the cameras 32a and 32b having a wide angle of view 40B. Further, each binocular photographed image 34b includes aberrations. Therefore, even if the above-mentioned aberration is corrected by image processing, the detection accuracy of both eyes by the binocular detection unit 73 is the same as the detection accuracy of the subject eye E by the subject eye detection unit 79 during precision alignment, which will be described later. inferior to

FIG. 8 is an explanatory diagram for explaining the positional relationship between the eye E to be examined and the measurement optical system 28 (measurement head 18) before and after rough alignment by the rough alignment control unit 74. Here, the reference numeral 8A in FIG. 8 indicates an example of the positional relationship between the eye E to be examined and the measurement optical system 28 before rough alignment, and the reference numeral 8B in FIG. An example of the positional relationship with the system 28 is shown.

As shown in FIG. 8 and FIG. By driving the XYZ drive mechanism 24 to roughly align the measurement optical system 28 with respect to the eye E, the eye E and the measurement optical system 28 are roughly aligned.

In this way, the rough alignment is performed based on the detection results of the binocular detection unit 73, that is, the binocular images 34b (wide-angle images) taken by each of the cameras 32a and 32b. Here, in each binocular photographed image 34b, the image of the eye to be examined E including the eye to be examined looks like a black dot with a rather large pupil. For this reason, coarse alignment is significantly different from conventional alignment techniques that detect the outline of the pupil and the bright spot within the pupil in a narrow-angle image.

Examples of the coarse alignment method include the following first method and second method.

As a first method, the coarse alignment control section 74 uses the known methods described in Patent Documents 1 and 2 above, for example, to determine the relative position (3 Detect the dimensional position). Next, the rough alignment control unit 74 drives the XYZ drive mechanism 24 to roughly align the measurement optical system 28 with respect to the eye E based on the detection results of the relative positions of both eyes.

As a second method, the rough alignment control section 74 controls the XYZ drive mechanism so that the image of the eye E to be examined moves to the vicinity of the center of the image for each binocular photographed image 34b based on the detection results of the binocular detection section 73. 24 to perform rough alignment in the X-axis direction and Y-axis direction. Further, the coarse alignment control unit 74 drives the XYZ drive mechanism 24 based on the detection results of the binocular detection unit 73 so that the image of the eye E in each binocular photographed image 34b is larger than a predetermined size. Then, rough alignment in the Z-axis direction is performed.

Reference numeral 9A in FIG. 9 is an explanatory diagram showing an example of a binocular photographed image 34b for each camera 32a, 32b after rough alignment, and reference numeral 9B is an explanatory diagram showing an example of a binocular photographed image 34b for each camera 32a, 32b after rough alignment. FIG. 4 is a diagram showing an example of an image 34c of the eye to be inspected taken by each of the cameras 32a and 32b when the camera 32a and 32b are switched. In addition, in the reference numeral 9A in FIG. 9, the eye E within the dotted line frame is the eye E to be examined.

As shown by reference numeral 9A in FIG. 9, by performing the rough alignment, the positional deviation between the eye E and the measurement optical system 28 in the XYZ axis directions is corrected to some extent from the time of the first photographing. Thereby, the eye E to be examined is included within the narrow angle of view 40A of the cameras 32a and 32b. As a result, as shown by reference numeral 9B in FIG. 9, when the angle of view of the cameras 32a and 32b is switched from the wide angle of view 40B to the narrow angle of view 40A during precision alignment to be described later, each of the cameras 32a and 32b A photographed image 34c of the eye to be examined, which is an enlarged image of E, is obtained.

<Precision alignment execution unit>
Returning to FIG. 4, when the coarse alignment is completed or when the coarse alignment execution unit 60 does not operate (based on the detection result of the pre-examined eye detection unit 57 2) to perform fine alignment. When the rough alignment is completed, this fine alignment execution section 62 functions as a narrow angle control section 76, a subject eye imaging control section 78, a subject eye detection section 79, a relative position detection section 80, and a fine alignment control section 82. do.

The narrow-angle control section 76 drives the zoom lens optical systems 35 of the cameras 32a and 32b via the stereo camera control section 54, and switches the angle of view of the cameras 32a and 32b from the wide angle of view 40B to the narrow angle of view 40A. As a result, as shown by reference numeral 9B in FIG. 9, the cameras 32a and 32b produce a high-definition photographed image 34c of the subject's eye within a narrow area including the subject's eye E within the face Hf, that is, the subject's eye E. A high-definition enlarged image is taken.

When the narrow-angle control section 76 changes the angle of view (photographing range) of the cameras 32a, 32b, the subject's eye photography control section 78 controls the stereo camera control section 54 to change the angle of view of the face Hf by the cameras 32a, 32b. Photographing of the eye to be examined, which is photographing of the eye E to be examined, is executed. As a result, the eye to be examined image 34c captured by each of the cameras 32a and 32b is output to the eye to be examined detection unit 79.

The subject's eye detecting section 79 performs image analysis in the same way as the pre-examined eye detecting section 57 based on the subject's eye photographed images 34c inputted for each of the cameras 32a and 32b, and detects the subject's eye for each subject's eye photographed image 34c. The subject's eye E (detection of the position of the subject's eye E, etc.) is performed from within the optometry photographed image 34c. Then, the eye detection section 79 outputs the detection result of the eye E for each eye photographed image 34c to the relative position detection section 80.

Here, detection of the eye E to be examined by the eye detection unit 79 is performed based on a high-definition image 34c of the eye to be examined around the eye E taken by the cameras 32a and 32b having a narrow angle of view 40A. Therefore, the eye to be examined detection unit 79 can detect the eye to be examined E with higher accuracy than during the rough alignment described above.

The relative position detection unit 80 detects the relative position (three-dimensional position) of the eye E to be examined with respect to the measurement optical system 28 based on the detection result of the eye detection unit 79 using the known method described in Patent Documents 1 and 2 mentioned above. do. Since the detection accuracy of the eye E to be examined by the eye detection section 79 in the second repetition control is high, the relative position can also be detected with high accuracy by the relative position detection section 80.

The precision alignment control unit 82 drives the XYZ drive mechanism 24 via the drive control unit 55 based on the detection result of the relative position of the eye E by the relative position detection unit 80, and aligns the measurement optical system 28 with respect to the eye E to be examined. Perform precision alignment. Thereby, the measurement optical system 28 can be aligned with high precision with respect to the eye E to be examined.

Note that, when the coarse alignment execution section 60 does not operate (when the pre-photographed image 34a of each camera 32a, 32b is the photographed eye image 34c), the fine alignment execution section 62 performs the relative position detection section 80 and the fine alignment. It functions as a control section 82. Thereby, the relative position detection unit 80 detects the relative position of the eye E to be examined based on the pre-photographed image 34a obtained by pre-photographing by the cameras 32a and 32b, that is, the photographed image 34c of the eye to be examined. Further, the precision alignment control section 82 drives the XYZ drive mechanism 24 via the drive control section 55 based on the detection result by the relative position detection section 80 to execute precision alignment.

<Eye characteristic calculation section>
The eye characteristic calculation unit 64 calculates the eye refractive power of the eye E to be examined based on the light reception signal output from the measurement optical system 28 using a known method. Further, the eye characteristic calculation unit 64 causes the display unit 26 to display the calculation result of the eye refractive power via the display control unit 50, and stores the calculation result of the eye refractive power in a storage unit (not shown).

<Pupillary distance calculation section>
FIG. 10 is an explanatory diagram for explaining the calculation of the pupillary distance PD by the pupillary distance calculating section 66. FIG. 11 is an explanatory diagram for explaining switching of the eye E to be examined by the measurement optical system 28.

As shown in FIG. 10, the interpupillary distance calculation unit 66 calculates the distance between the pupils of both eyes based on the detection results of both eyes by the binocular detection unit 73 and the known imaging magnification and imaging direction of the cameras 32a and 32b. Calculate distance PD. This interpupillary distance PD can be used, for example, for precise alignment between the other eye E and the measurement optical system 28 when the measurement optical system 28 has completed the operation of acquiring the refractive power of one eye of the eye E. can.

As shown by reference numeral XIA in FIG. Based on the results, the XYZ drive mechanism 24 is driven to perform rough alignment of the measurement optical system 28 with respect to the other eye E, as shown by reference numeral XIB. Next, each part of the precision alignment execution section 62 operates to perform precision alignment of the measurement optical system 28 with respect to the other eye E to be examined.

<Action of the first embodiment>
FIG. 12 is a flowchart showing the process of measuring the eye refractive power of the eye E to be examined by the ophthalmologic apparatus 10 of the first embodiment, particularly the flow of the auto-alignment process according to the method of controlling the ophthalmologic apparatus of the present invention. Note that the angle of view of the cameras 32a and 32b is initially set to a narrow angle of view 40A.

As shown in FIG. 12, when the face Hf of the subject H is supported by the face support section 14, the examiner inputs a measurement start operation to the operation section 48. Upon receiving the input of this measurement start operation, the pre-imaging control section 56 controls the cameras 32a, 32b via the stereo camera control section 54 to cause the cameras 32a, 32b to perform pre-imaging (step S1). Thereby, the pre-examined eye detection section 57 acquires the pre-photographed image 34a from the cameras 32a and 32b via the stereo camera control section 54 (step S2).

The pre-examined eye detection unit 57 that has acquired the pre-photographed images 34a for each of the cameras 32a and 32b performs image analysis of each photographed image 34 individually, and starts detecting the examinee's eye E for each pre-photographed image 34a (step S3). When the number of eye-to-be-tested images 34c detected by the preliminary eye-to-be-examined detection unit 57 among the pre-photographed images 34a for each of the cameras 32a and 32b is "2", that is, all the pre-photographed images 34a include the eye to be examined is included, the process advances to step S12 (described later) (NO in step S4).

On the other hand, when the number of subject eye photographed images 34c detected by the preliminary subject eye detection unit 57 is one or less, each part of the coarse alignment execution unit 60 (wide-angle control unit 70, binocular photography control unit 72, binocular photography control unit 72, binocular photography control unit 72, The detection unit 73 and the rough alignment control unit 74) are activated (YES in step S4).

First, the wide-angle control unit 70 drives the zoom lens optical system 35 of the cameras 32a, 32b via the stereo camera control unit 54, and switches the angle of view of the cameras 32a, 32b from the narrow angle of view 40A to the wide angle of view 40B. (Step S5 corresponds to the photographing range control step of the present invention). This widens the photographing range of each of the cameras 32a and 32b, so that at least both eyes of the face Hf can be included in each photographing range (see FIGS. 5 to 7).

Next, the binocular photography control unit 72 controls the stereo camera control unit 54 to cause the cameras 32a and 32b to perform binocular photography (step S6, which corresponds to the binocular photography control step of the present invention). As a result, the acquisition of the binocular images 34b by the cameras 32a and 32b and the input of the binocular images 34b for each of the cameras 32a and 32b to the binocular detection unit 73 are executed.

The binocular detection unit 73, which receives the binocular images 34b from each of the cameras 32a and 32b, performs binocular detection for each binocular image 34b and detects the binocular detection results for each binocular image 34b. It is output to the coarse alignment control section 74 (step S7, corresponding to the binocular detection step of the present invention). Since binocular photography by the cameras 32a and 32b is performed with the angle of view set to the wide angle of view 40B, the binocular detection unit 73 detects the binocular images from all of the binocular images 34b for each of the cameras 32a and 32b. can be detected.

Then, the coarse alignment control unit 74 drives the XYZ drive mechanism 24 via the drive control unit 55 based on the binocular detection results for each binocular photographed image 34b input from the binocular detection unit 73, and As shown in FIG. 8, rough alignment of the measurement optical system 28 with respect to the eye E is performed (step S8, corresponding to the rough alignment control step of the present invention). Thereby, the positional deviation between the eye E and the measurement optical system 28 can be corrected (adjustment of the positional relationship).

When the rough alignment is completed, each part of the fine alignment execution section 62 (narrow angle control section 76, subject eye imaging control section 78, subject eye detection section 79, relative position detection section 80, and fine alignment control section 82) is activated.

First, the narrow-angle control unit 76 drives the zoom lens optical systems 35 of the cameras 32a and 32b via the stereo camera control unit 54 to change the angle of view of the cameras 32a and 32b from the wide angle of view 40B to the narrow angle of view 40A. (Step S9). Since the rough alignment is performed in advance, a high-definition photographed image 34c of the eye E can be captured by the cameras 32a and 32b.

Next, the eye photographing control unit 78 controls the stereo camera control unit 54 to cause the cameras 32a and 32b to perform photographing of the eye to be examined (step S10, which corresponds to the eye photographing control step of the present invention). As a result, acquisition of the image 34c of the eye to be examined by the cameras 32a and 32b and input of the image 34c of the eye to be examined for each camera 32a and 32b to the eye detection unit 79 are executed.

The eye to be examined detection unit 79, which receives the input of the eye to be examined image 34c for each of the cameras 32a and 32b, performs eye detection for each eye to be examined image 34c, and also detects the eye to be examined E for each eye to be examined image 34c. is output to the relative position detection section 80 (step S11, corresponding to the eye detection step of the present invention). Since rough alignment has been performed in advance, a high-definition enlarged image of the eye E can be detected from all of the eye images 34c taken by the cameras 32a and 32b with the narrow angle of view 40A. As a result, precise alignment can be performed.

Then, the relative position detection unit 80 detects the relative position of the eye E to be examined with respect to the measurement optical system 28 based on the detection result of the eye E to be examined for each eye photographed image 34c input from the eye detection unit 79 (step S12, which corresponds to the relative position detection step of the present invention). Next, based on the detection result of the relative position detection section 80, the precision alignment control section 82 drives the XYZ drive mechanism 24 via the drive control section 55 to precisely align the measurement optical system 28 with respect to the eye E ( Step S13 corresponds to the precision alignment control step of the present invention). Thereby, the measurement optical system 28 can be aligned with high precision with respect to the eye E to be examined.

Note that if the answer is NO in step S4 described above, step The processes of S12 and S13 are executed.

When the precise alignment is completed, the optical system control unit 52 controls the measurement optical system 28 to cause the measurement optical system 28 to perform an operation of acquiring the eye refractive power of the eye E to be examined (step S14). As a result, the measurement optical system 28 irradiates the measurement light onto the eye E, the measurement optical system 28 receives the return light from the eye E, and outputs the light reception signal to the eye characteristic calculation unit 64. Ru. Next, the eye characteristic calculation unit 64 calculates the eye refractive power of the eye E to be examined based on the light reception signal input from the measurement optical system 28 (step S15).

When the measurement of the refractive power of one eye of the eye E is completed, the interpupillary distance calculating section 66 calculates the interpupillary distance PD of both eyes based on the detection results of the binocular detecting section 73, etc. (NO in step S15). , step S16). Note that the timing of calculation of the pupillary distance PD by the pupillary distance calculating section 66 is not particularly limited as long as it is after step S7.

Next, the rough alignment control section 74 drives the XYZ drive mechanism 24 based on the calculation result of the interpupillary distance PD by the interpupillary distance calculation section 66 to roughly align the measurement optical system 28 with respect to the other eye E to be examined. (Step S17). Thereafter, the processes from step S10 to step S14 (precision alignment and calculation of eye refractive power) are repeatedly executed, and the measurement of the eye refractive power of both eyes of the subject's eye E is completed (YES at step S15).

[Effects of the first embodiment]
As described above, in the first embodiment, by photographing the face Hf with the cameras 32a and 32b having the wide angle of view 40B, it is possible to reliably identify both eyes, including the eye E, from the binocularly photographed images 34b of the cameras 32a and 32b. can be detected. Even when the eye E to be examined does not exist within the narrow angle of view 40A of at least one of the cameras 32a, 32b, fine alignment can be automatically performed after coarse alignment. This eliminates the need for the examiner to perform alignment manually. Furthermore, by simultaneously photographing the eye E and both eyes using the stereo camera 32, the relative position of the eye E can be detected without being affected by the rotation of the eye E and the slight movement of the face Hf. can. Further, since the precise alignment can be performed for each eye after grasping the positions of both eyes of the eye E based on the photographed image 34 taken when performing the rough alignment, the precise alignment can be performed efficiently. As a result, in the first embodiment, it is possible to achieve both improved alignment workability and higher precision.

Furthermore, in the first embodiment, after rough alignment, fine alignment is performed based on the photographed images 34 taken by the cameras 32a and 32b having the narrow angle of view 40A, so that alignment can be performed with higher precision.

[Modified example of the stereo camera of the first embodiment]
Next, a first modification, a second modification, and a third modification of the ophthalmologic apparatus 10 of the first embodiment will be described. Note that each modification has basically the same configuration as the ophthalmologic apparatus 10 of the first embodiment, except that the type of stereo camera 32 is different, so it is the same in function or configuration as the first embodiment. The same reference numerals are given to the same reference numerals, and the explanation thereof will be omitted.

<First modification example>
FIG. 13 is an explanatory diagram for explaining a pair of cameras 32a and 32b of the stereo camera 32 corresponding to the first modification. As shown in FIG. 13, the cameras 32a and 32b of the stereo camera 32 of the first modification include a lens system 92 and a liquid lens 94 instead of the zoom lens optical system 35 described above.

Although the lens system 92 is shown in a simplified manner in the figure, it is an optical system that combines a plurality of lenses including an objective lens.

The liquid lens 94 is a lens whose shape can be changed by applying voltage. Note that the details of the liquid lens 94 are a publicly known technique, and therefore a specific explanation will be omitted here. By changing the shape of the liquid lens 94, the focal length f (see FIG. 3) changes, and the angle of view of the cameras 32a and 32b can be changed in accordance with the change in the focal length f.

The stereo camera control unit 54 of the first modified example controls the shape of the liquid lens 94 in addition to controlling the photography of the cameras 32a and 32b as in the first embodiment. In pre-photography, the stereo camera control unit 54 controls the liquid lens 94 so that the angle of view of the cameras 32a and 32b becomes a narrow angle of view 40A under the control of the pre-photography control unit 56, as shown by reference numeral XIIIA in FIG. control the shape of the

In addition, the stereo camera control unit 54 controls the liquid lens so that the angle of view of the cameras 32a and 32b becomes a wide angle of view 40B under the control of the wide-angle control unit 70 in binocular photography, as shown by reference numeral XIIIB in FIG. 94 shape. Further, in photographing the subject's eye, the stereo camera control unit 54 controls the shape of the liquid lens 94 under the control of the narrow-angle control unit 76 so that the angle of view of the cameras 32a and 32b becomes the narrow angle of view 40A ( (See reference numeral XIIIA).

In this way, in the first modification, the angle of view of the cameras 32a, 32b can be switched between the narrow angle of view 40A and the wide angle of view 40B by changing the shape of the liquid lens 94, so that it is different from the first embodiment. A similar effect can be obtained.

<Second modification example>
FIG. 14 is an explanatory diagram for explaining a pair of cameras 32a and 32b of the stereo camera 32 corresponding to the second modification. As shown in FIG. 14, the cameras 32a and 32b of the stereo camera 32 of the second modification include a lens system 96, a moving lens 98, and a lens moving mechanism 100 instead of the zoom lens optical system 35.

Like the lens system 92 of the first modification, the lens system 96 is an optical system that combines a plurality of lenses including an objective lens.

The movable lens 98 is moved by the lens moving mechanism 100 into a set position located on the optical axis O2 and between the lens system 96 and the image sensor 36, and a retracted position where it is retracted from this set position in a direction perpendicular to the optical axis O2. It is held in position and movable.

The lens moving mechanism 100 is a known actuator, and selectively moves the moving lens 98 between a set position and a retracted position. The viewing angles of the cameras 32a and 32b can be switched by moving the movable lens 98 to a set position on the optical axis O2 or to a retracted position off the optical axis O2.

Specifically, in the second modification, when the movable lens 98 is moved to the retracted position, the angle of view of the cameras 32a and 32b is switched to the narrow angle of view 40A (see symbol XIVA in FIG. 14), and the movable lens 98 is moved to the set position. When the camera is moved to , the angle of view of the cameras 32a and 32b is switched to a wide angle of view 40B (see reference numeral XIVB in FIG. 14). Note that the narrow angle of view 40A and the wide angle of view 40B are determined by the types and arrangement of the lens system 92 and the moving lens 98.

The stereo camera control unit 54 of the second modified example controls the driving of the lens moving mechanism 100 in addition to controlling the shooting of the stereo camera 32 (cameras 32a, 32b) as in the first embodiment. When performing pre-photography, the stereo camera control section 54 drives the lens moving mechanism 100 to move the movable lens 98 to the retracted position under the control of the pre-photography control section 56, thereby controlling the cameras 32a, 32b. The viewing angle is switched to a narrow viewing angle of 40A (see code XIVA).

Furthermore, when performing binocular photography, the stereo camera control section 54 drives the lens movement mechanism 100 to move the movable lens 98 to the set position under the control of the wide-angle control section 70, thereby controlling the camera 32a, The viewing angle of 32b is switched to wide viewing angle 40B (see code XIVB). Furthermore, when photographing the subject's eye, the stereo camera control section 54 drives the lens movement mechanism 100 to move the movable lens 98 to the retracted position under the control of the narrow-angle control section 76, thereby controlling the camera 32a. , 32b is switched to a narrow angle of view 40A (see code XIVA).

In this way, in the second modification, by switching the position of the movable lens 98 between the retracted position and the set position, the angle of view of the cameras 32a and 32b can be switched between the narrow angle of view 40A and the wide angle of view 40B. , the same effects as in the first embodiment can be obtained.

<Third modification example>
FIG. 15 is an explanatory diagram for explaining two types of stereo cameras 32N and 32W corresponding to the third modification. As shown in FIG. 15, the third modification includes two types of stereo cameras 32N and 32W with mutually different angles of view.

The stereo camera 32N includes a pair of left and right cameras 32a1 and 32b1. The cameras 32a1 and 32b1 include a lens system 102A having an optical axis O2A and an image sensor 36. The position of the lens system 102A is adjusted so that the angle of view of the cameras 32a1 and 32b1 becomes a narrow angle of view 40A (see reference numeral 3A in FIG. 3). Thereby, the cameras 32a1 and 32b1 photograph the face Hf at the narrow angle of view 40A.

The stereo camera 32W includes a pair of left and right cameras 32a2 and 32b2. The cameras 32a2 and 32b2 include a lens system 102B having an optical axis O2B and an image sensor 36. The position of the lens system 102B is adjusted so that the angle of view of the cameras 32a2 and 32b2 becomes a wide angle of view 40B (see reference numeral 3B in FIG. 3). Thereby, the cameras 32a2 and 32b2 photograph the face Hf at the wide angle of view 40B.

The stereo camera control unit 54 of the third modified example functions as a multi-lens camera control unit of the present invention, and controls photography by the two types of stereo cameras 32N and 32W, that is, selectively controls the two types of stereo cameras 32N and 32W. Activate. When performing pre-photography, the stereo camera control section 54 operates the stereo camera 32N under the control of the pre-photography control section 56, and executes the photographing of the face Hf using the cameras 32a1 and 32b1 with the narrow angle of view 40A. let

In addition, when performing binocular photography, the stereo camera control unit 54 operates the stereo camera 32W under the control of the wide-angle control unit 70, so that the binocular images of the face Hf are captured by the cameras 32a2 and 32b2 having the wide angle of view 40B. Execute the shooting. Further, when photographing the subject's eye, the stereo camera control unit 54 operates the stereo camera 32N under the control of the narrow-angle control unit 76, so that the face Hf is covered by the cameras 32a1 and 32b1 having the narrow angle of view 40A. Photographing of optometry E is executed.

In this way, in the third modification, by selectively operating the two types of stereo cameras 32N and 32W, it is possible to switch between stereo photography at the narrow angle of view 40A and stereo photography at the wide angle of view 40B. As a result, the same effects as in the first embodiment can be obtained. Moreover, optimal arrangement is possible for each of the stereo cameras 32N and 32W.

[Second embodiment]
FIG. 16 is a functional block diagram of the control device 30 of the ophthalmologic apparatus 10 of the second embodiment. In the ophthalmological apparatus 10 of the first embodiment (including each modification example), coarse alignment is performed based on the detection results by the binocular detection unit 73 described above, but due to some reason, the binocular detection unit 73 performs the coarse alignment. Eye detection may fail in some cases.

Therefore, the ophthalmologic apparatus 10 of the second embodiment has a function that allows coarse alignment to be performed even when binocular detection by the binocular detection unit 73 fails. The ophthalmologic apparatus 10 of the second embodiment has basically the same configuration as the ophthalmologic apparatus 10 of the first embodiment, so the same reference numerals are used for the same functions or configurations as those of the first embodiment. Therefore, the explanation will be omitted.

As shown in FIG. 16, the control device 30 of the second embodiment has basically the same configuration as the first embodiment described above, except that it functions as the operation receiving section 110.

Note that, when the binocular detection unit 73 fails in binocular detection, the display control unit 50 of the second embodiment causes the display unit 26 to display the binocular captured images 34b for each of the cameras 32a and 32b (see FIG. 17). ).

FIG. 17 is an explanatory diagram for explaining reception of a designation operation for both eyes of the eye E by the operation reception unit 110. As shown in FIG. 17 and FIG. 16 described above, the operation reception unit 110 displays binocular images 34b for each of the cameras 32a and 32b on the display unit 26 in response to a failure in binocular detection by the binocular detection unit 73. Activates when The operation reception unit 110 accepts a specified operation input by the examiner via the operation unit 48.

The designation operation is an operation in which the examiner designates at least both eyes for each binocular photographed image 34b within the display surface of the display unit 26 (see reference numeral XVIIA in FIG. 17). Note that in the designation operation of this embodiment, in addition to both eyes, the chin of the face Hf is also designated.

Specifically, the examiner specifies positions corresponding to both eyes and chin of the face Hf within the display surface of the display unit 26 by touch operation using the finger 115. Note that the examiner may specify both eyes using a controller, mouse, keyboard, or the like. The operation receiving unit 110 outputs the positional coordinates of each specified position 120 of both eyes and jaw specified for each captured image 34 by the specifying operation to the coarse alignment control unit 74 (see reference numeral XVIIB in FIG. 17).

If binocular detection by the binocular detection unit 73 fails, the coarse alignment control unit 74 of the second embodiment adjusts the XYZ drive mechanism 24 based on the position coordinates of each designated position 120 input from the operation reception unit 110. is driven to roughly align the measuring optical system 28 with respect to the eye E to be examined.

FIG. 18 is a flowchart showing the process of measuring the eye refractive power of the eye E, particularly the rough alignment process, performed by the ophthalmologic apparatus 10 of the second embodiment. Note that the processes from step S1 to step S7 are the same as those in the first embodiment shown in FIG. 12 described above, so a detailed description thereof will be omitted.

As shown in FIG. 18, when the binocular detection by the binocular detection unit 73 fails (YES in step S7A), the display control unit 50 detects the image taken by the camera 32a in step S6 as shown in FIG. , 32b are displayed on the display unit 26 (step S7B).

Next, the examiner performs a designation operation on the display surface of the display unit 26 to designate both eyes and chin of the eye E to be examined for each binocular photographed image 34b via the operation unit 48. As a result, the operation reception unit 110 receives the specifying operation inputted by the examiner into the operation unit 48, and adjusts the position coordinates of each specified position 120 of both eyes and jaw for each binocular photographed image 34b to the coarse alignment control unit 74. (step S7C).

Next, the rough alignment control unit 74 drives the XYZ drive mechanism 24 based on the position coordinates of each specified position 120 input from the operation reception unit 110, and performs rough alignment of the measurement optical system 28 with respect to the eye E ( Step S8). Note that the subsequent processing is the same as in the first embodiment (see FIG. 12), so a detailed description will be omitted.

As described above, in the second embodiment, even if binocular detection by the binocular detection unit 73 fails, the examiner can at least designate both eyes for each binocular photographed image 34b on the display screen of the display unit 26. Specified operations can be performed. As a result, since coarse alignment can be performed, precise alignment can also be performed, and alignment can be performed with higher precision.

[Third embodiment]
FIG. 19 is a functional block diagram of the control device 30 of the ophthalmologic apparatus 10 of the third embodiment. In the ophthalmological apparatus 10 of each of the above embodiments (including each modification example), when the number of eye-to-be-examined images 34c detected by the preliminary eye-to-be-examined detection unit 57 is one or less, the imaging range of the cameras 32a, 32b is The angles of view of the cameras 32a and 32b are changed to the wide-angle side so that both eyes are included in the (angle of view).

On the other hand, in the third embodiment, when the number of eye-to-be-tested images 34c detected by the preliminary eye-to-be-examined detection unit 57 is one or less, the relationship between the eye to be examined E and the measurement optical system 28 (measuring head 18) is By adjusting the positional relationship, both eyes are included within the photographing range of the cameras 32a and 32b.

As shown in FIG. 19, the ophthalmological apparatus 10 according to the third embodiment has the following features: the coarse alignment execution section 60 of the control device 30 functions as the imaging range control section 130 instead of the wide-angle control section 70, and the fine alignment execution section 62 The configuration is basically the same as the ophthalmologic apparatus 10 of each of the embodiments described above, except that the ophthalmologic apparatus 10 does not function as the narrow-angle control section 76 . For this reason, the same reference numerals are given to the same elements in terms of functions or configurations as in each of the above-described embodiments, and the explanation thereof will be omitted.

Based on the detection result of the pre-examined eye detection unit 57, the imaging range control unit 130 controls the imaging range of the face Hf by the cameras 32a and 32b in order to change the imaging range of the face Hf by the cameras 32a and 32b when the number of eye imaging images 34c is less than or equal to 1. , controls the drive of the XYZ drive mechanism 24 via the drive control section 55.

FIG. 20 is an explanatory diagram for explaining drive control of the XYZ drive mechanism 24 by the photographing range control section 130.

As shown in FIG. 20, the imaging range control unit 130 drives the XYZ drive mechanism 24 via the drive control unit 55 to move the measurement optical system 28 (measurement head 18) relative to the eye E to be examined. Specifically, the photographing range control unit 130 moves the measuring optical system 28 from an initial position (see symbol XXA in FIG. 20), which is the position at the time of first photographing, to a correction position (see symbol XXB in FIG. 20), which will be described later. Move relative.

The correction position is a position of the measurement optical system 28 such that both eyes of the eye E to be examined are included in the photographing range (narrow angle of view 40A) of the face Hf for each camera 32a, 32b, for example, from the initial position in the Z-axis direction. The position is shifted to the rear. When the angles of view of the cameras 32a and 32b are fixed, as the working distance WD increases, the photographing range of the face Hf photographed by the cameras 32a and 32b becomes wider. Therefore, the photographing range control section 130 drives the XYZ drive mechanism 24 via the drive control section 55 to move the measurement optical system 28 to the correction position, that is, at least in the direction in which the working distance WD increases (backward in the Z-axis direction). side), both eyes of the eye E to be examined can be included within the photographing range of the face Hf (within the narrow angle of view 40A) of each of the cameras 32a and 32b.

Further, the correction position may be determined by, for example, the following first to fifth methods. In the first method, the relative positions of both eyes with respect to the measurement optical system 28 are detected (predicted) based on the detection results of the preliminary eye detection unit 57, and the angles of view of the cameras 32a and 32b and the optical axis O2 are The correction position is determined based on the direction. In the second method, a correction position is determined based on the position and size of the eye E within the pre-photographed image 34a obtained by pre-photographing.

In the third method, a position where the working distance WD is large (for example, a position at which the measurement head 18 moves backward in the Z-axis direction) is determined as the correction position. In the fourth method, a predetermined appropriate position is determined as the correction position. In the fifth method, the correction position is determined based on the result of performing face recognition processing or the like to recognize the face Hf in the pre-photographed image 34a obtained by pre-photographing.

Note that when the positional deviation between the eye E and the measurement optical system 28 (measurement head 18) in the Y-axis direction is large, the imaging range control unit 130 controls the face support unit drive mechanism 14c via the drive control unit 55. , the table drive mechanism 44, and the chair drive mechanism 46. That is, the relative position of the eye E to be examined with respect to the measurement optical system 28 may be adjusted by adjusting the position in the Y-axis direction of at least one of the chin rest 14a, the table 20, and the seat of a chair (not shown). .

In this way, in the third embodiment, by moving the other one of the eye E and the measurement optical system 28 relative to the other, at least both eyes of the eye E are included in the photographing range of each of the cameras 32a and 32b. be able to. Thereby, coarse alignment and fine alignment can be performed similarly to each of the above embodiments.

Note that the relative movement mechanisms that relatively move one of the eye E and the measurement optical system 28 relative to the other are limited to the XYZ drive mechanism 24, the face support drive mechanism 14c, the table drive mechanism 44, and the chair drive mechanism 46. Instead, various known moving mechanisms can be used.

FIG. 21 is a flowchart showing the process of measuring the eye refractive power of the eye E to be examined, particularly the rough alignment process, performed by the ophthalmological apparatus 10 of the third embodiment. Note that the processes from step S1 to step S4 are the same as those in the first embodiment shown in FIG. 12 described above, so a detailed description thereof will be omitted.

When the number of eye-to-be-examined images 34c detected by the preliminary eye-to-be-examined detection unit 57 is one or less, the imaging range control unit 130 drives the XYZ drive mechanism 24 via the drive control unit 55 to capture the eye to be examined E. The measuring optical system 28 (measuring head 18) is moved relative to the correction position (YES in step S4, step S5A). Note that step S5A corresponds to the photographing range control step of the present invention. Thereby, as shown in FIG. 20 described above, at least both eyes can be included in the photographing range of each of the cameras 32a and 32b.

Thereafter, similarly to the first embodiment, the processes after step S6 are executed. However, in the third embodiment, since the viewing angles of the cameras 32a and 32b are fixed, step S9 (see FIG. 12) described in the first embodiment is omitted. Note that if the binocular detection unit 73 fails in binocular detection in step S7, the processes of steps S7A, S7B, and S7C of the second embodiment shown in FIG. 18 described above are executed.

As described above, in the third embodiment, the relative position of both eyes and the measuring optical system 28 (measuring head 18) to one side is set so that both eyes of the eye E to be examined are included in the photographing range of each camera 32a, 32b. The position can be adjusted. As a result, the binocular detection unit 73 can reliably detect both eyes from all the binocular images 34b. As a result, the same effects as in the first embodiment can be obtained. Furthermore, in the third embodiment, since there is no need to provide the zoom lens optical system 35 in the cameras 32a and 32b, the cost is lower than in the first embodiment.

[Modification of third embodiment]
FIG. 22 is an explanatory diagram for explaining a modification of the ophthalmologic apparatus 10 of the third embodiment. In the third embodiment, the correction position is not particularly limited, but as shown in FIG. 22, in a modified example of the third embodiment, the correction position is limited to a position along the reference axis 200.

The reference axis 200 is an axis parallel to the Z-axis direction, and is a central axis passing through the center position of the movement range of the measurement optical system 28 (measurement head 18) in the XY-axis directions. Note that the reference axis 200 may be an axis passing through the placement area of the face Hf determined based on the position of the chin rest 14a of the face support part 14, etc., instead of the central axis described above.

FIG. 23 is an explanatory diagram for explaining the effect of a modification of the third embodiment. As shown by reference symbol XXIIIA in FIG. 23, by limiting the correction position to a position along the reference axis 200, the working distance WD is Even if it is short, both eyes of the eye E to be examined can be included within the photographing range of the cameras 32a and 32b (narrow angle of view 40A). That is, the moving distance in the Z-axis direction (working distance direction) when moving the measurement optical system 28 from the initial position to the correction position can be shortened.

Furthermore, as shown by XXIIIB in FIG. 23, even if the narrow angle of view 40A of the cameras 32a, 32b is narrow, both eyes of the subject's eye E can be included within the photographing range of the cameras 32a, 32b. Thereby, alignment can be performed with higher precision.

[Fourth embodiment]
Next, the ophthalmologic apparatus 10 of the fourth embodiment will be explained. In the ophthalmological apparatus 10 of each of the embodiments described above, it is determined whether or not the coarse alignment execution part 60 operates based on the detection result of the preliminary eye detection part 57, but in the ophthalmic apparatus 10 of the fourth embodiment, the pre-imaging and The coarse alignment execution unit 60 is operated without analyzing the pre-photographed image 34a (detecting the eye E to be examined). Note that the ophthalmological apparatus 10 of the fourth embodiment has the following points: the control device 30 does not function as the pre-imaging control section 56 and the pre-examined eye detection section 57, and the above-described FIG. , FIG. 18, and FIG. 21 are basically the same as the ophthalmologic apparatus 10 of each embodiment in that the processes of steps S1 to S4 shown in FIG. 21 are omitted. Therefore, the same effects as the ophthalmological apparatus 10 of each of the embodiments described above can be obtained with the ophthalmological apparatus 10 of the fourth embodiment.

In the fourth embodiment, for example, when the subject H is detected by a detection sensor (not shown), when the detection sensor detects that the face Hf is supported by the face support section 14, or when the examiner starts measurement. When an operation is input to the operation unit 48, the coarse alignment execution unit 60 may be activated.

[others]
In each of the above embodiments, the cameras 32a and 32b take pictures at the same time (including substantially simultaneously), but the cameras 32a and 32b may take pictures with a time difference. In this case, the imaging timing of each of the cameras 32a and 32b is simply shifted, and imaging is not performed while moving the monocular camera relative to the eye E as described in Patent Document 3, so the camera The time difference between images 32a and 32b can be adjusted as appropriate. Therefore, even if a time difference is provided between the images taken by the cameras 32a and 32b, by shortening this time difference, the effects of rotation of the eye E to be examined and slight movement of the face Hf can be suppressed to a minimum.

In the first embodiment (including each modification example), the angle of view of the cameras 32a and 32b is switched between the narrow angle of view 40A and the wide angle of view 40B. It may be performed continuously. In this case, switching of the angle of view, binocular photography by the cameras 32a and 32b, and detection by the binocular detection unit 73 are performed until both eyes of the subject's eye E are included in the photography range of each camera 32a and 32b. , repeatedly.

In the third embodiment, the measurement optical system 28 (measuring head 18) is moved from the initial position to the correction position, but the relative movement of the eye E and the measurement optical system 28 may be performed stepwise or continuously. good. In this case, the relative movement of the eye E and the measurement optical system 28, the binocular photography by the cameras 32a and 32b, and the relative movement of the eye E to be examined and the measurement optical system 28 until both eyes of the eye E are included in the photographing range of each camera 32a and 32b. The detection by the eye detection unit 73 is repeatedly performed.

In each of the above embodiments (excluding the third modification of the first embodiment), the face Hf is photographed by the stereo camera 32 composed of the two cameras 32a and 32b, but three or more various cameras are used. The face Hf may also be photographed. In this case, if the number of eye-to-be-examined images 34c is one or less based on the detection result of the preliminary eye-to-be-examined detection unit 57, it is assumed that both eyes of the eye to be examined E are included within the photographing range of at least two or more cameras. Next, the photographing range of the face Hf by each camera is changed.

In the third modification of the first embodiment, the face Hf is selectively photographed using two types of stereo cameras 32N and 32W with different angles of view, but three or more types of stereo cameras with different angles of view are used. The face Hf may be selectively photographed using a (multi-lens camera). In this case, the stereo cameras may be switched step by step in the order of gradually widening the angle of view until the number of eye-to-be-examined images 34c reaches at least 2 based on the detection result of the preliminary eye-to-be-examined detection unit 57. good.

In each of the above embodiments, the explanation has been given by taking as an example the ophthalmological apparatus 10 that measures the ocular refractive power of the eye to be examined E as the measurement of the ocular characteristics of the eye to be examined. The present invention can also be applied to various ophthalmological apparatuses that measure various ocular characteristics such as shape, fundus observation image, and fundus tomographic image.

10... Ophthalmic apparatus 14... Face support section 14c... Face support section drive mechanism 18... Measurement head 24... Cameras 32a1, 32b1...Cameras 32a2, 32b2...Camera 34...Photographed image 35...Zoom lens optical system 36...Image sensor 40A...Narrow angle of view 40B...Wide angle of view 44...Table drive mechanism 46...Chair drive mechanism 48...Operation unit 50 ...Display control section 52...Optical system control section 54...Stereo camera control section 55...Drive control section 56...Pre-imaging control section 57...Pre-examined eye detection section 60...Coarse alignment execution section 62...Fine alignment execution section 64...Eye characteristics Calculating unit 66...pupillary distance calculating unit 70...wide-angle control unit 72...binocular photography control unit 73...binocular detection unit 74...coarse alignment control unit 76...narrow-angle control unit 78...eye to be examined photography control unit 79...eye to be examined Detection unit 80...Relative position detection unit 82...Precision alignment control unit 94...Liquid lens 98...Movement lens 100...Lens movement mechanism 110...Operation reception unit 120...Specified position 130...Photography range control unit 200...Reference axis

Claims (17)

an optical system for acquiring ocular characteristics of an eye to be examined of a subject;
a drive control unit that controls driving of a relative movement mechanism that moves one of the eye to be examined and the optical system relative to the other;
a plurality of photographing units that photograph the subject's face from different directions;
a photographing range control unit that controls a photographing range in which a plurality of said photographing units photograph the face, and includes both eyes of said face within said photographing range of said two or more said photographing units; ,
a binocular photography control unit that causes each of the photography units including the both eyes within the photography range to execute photography of the both eyes;
a binocular detection unit that detects the binoculars from the binocular images for each of the binocular images based on the binocular images captured by each of the imaging units;
a coarse alignment control section that drives the relative movement mechanism via the drive control section based on the detection results of the binocular detection section to coarsely align the optical system with respect to the subject's eyes;
a pre-photographing control unit that causes each of the photographing units to perform pre-photographing of the face;
a preliminary eye detection unit that detects the eye to be examined from the pre-photographed image for each pre-photographed image based on the pre-photographed image of the pre-photographed for each of the photographing units;
Equipped with
The photographing range control section operates when the number of pre-photographed images including the same eye to be examined is one or less based on the detection result of the preliminary eye detection section, and controls the detection of two or more of the photographing sections. An ophthalmologic apparatus that includes both eyes within the imaging range . an eye imaging control unit that causes each of the imaging units to perform imaging of the eye to be examined when the rough alignment is completed;
a to-be-tested eye detection unit that detects the to-be-tested eye from the to-be-tested eye photographed image for each to-be-tested eye photographed image based on the to-be-tested eye photographed image photographed by the said photographing unit;
a relative position detection unit that detects a relative position of the eye to be examined with respect to the optical system based on a detection result of the eye to be examined detection unit;
Based on the detection result of the relative position detection section, the relative movement mechanism is driven via the drive control section to achieve precise alignment of the optical system with respect to the subject's eye, which is higher precision than the rough alignment. A precision alignment control unit that performs alignment;
The ophthalmologic apparatus according to claim 1, comprising: a pre-photographing control unit that causes each of the photographing units to perform pre-photographing of the face;
a preliminary eye detection unit that detects the eye to be examined from the pre-photographed image for each pre-photographed image based on the pre-photographed image of the pre-photographed for each of the photographing units;
Equipped with
If the number of pre-photographed images including the same eye to be examined is two or more based on the detection result of the pre-test eye detection section, the photographing range control section does not operate, and the relative position detection section does not operate. The ophthalmological apparatus according to claim 2 , wherein the relative position of the eye to be examined is detected based on the detection result of the preliminary eye to be examined detection unit. an optical system for acquiring ocular characteristics of an eye to be examined of a subject;
a drive control unit that controls driving of a relative movement mechanism that moves one of the eye to be examined and the optical system relative to the other;
a plurality of photographing units that photograph the subject's face from different directions;
a photographing range control unit that controls a photographing range in which a plurality of said photographing units photograph the face, and includes both eyes of said face within said photographing range of said two or more said photographing units; ,
a binocular photography control unit that causes each of the photography units including the both eyes within the photography range to execute photography of the both eyes;
a binocular detection unit that detects the binoculars from the binocular images for each of the binocular images based on the binocular images captured by each of the imaging units;
a coarse alignment control section that drives the relative movement mechanism via the drive control section based on the detection results of the binocular detection section to coarsely align the optical system with respect to the subject's eyes;
an eye imaging control unit that causes each of the imaging units to perform imaging of the eye to be examined when the rough alignment is completed;
a to-be-tested eye detection unit that detects the to-be-tested eye from the to-be-tested eye photographed image for each to-be-tested eye photographed image based on the to-be-tested eye photographed image photographed by the said photographing unit;
a relative position detection unit that detects a relative position of the eye to be examined with respect to the optical system based on a detection result of the eye to be examined detection unit;
Based on the detection result of the relative position detection section, the relative movement mechanism is driven via the drive control section to achieve precise alignment of the optical system with respect to the subject's eye, which is higher precision than the rough alignment. A precision alignment control unit that performs alignment;
a pre-photographing control unit that causes each of the photographing units to perform pre-photographing of the face;
a preliminary eye detection unit that detects the eye to be examined from the pre-photographed image for each pre-photographed image based on the pre-photographed image of the pre-photographed for each of the photographing units;
Equipped with
If the number of pre-photographed images including the same eye to be examined is two or more based on the detection result of the pre-test eye detection section, the photographing range control section does not operate, and the relative position detection section does not operate. , an ophthalmologic apparatus that detects the relative position of the eye to be examined based on the detection result of the preliminary eye to be examined detection unit. It has a function of changing the angle of view for each of the photographing units,
The photographing range control unit is a wide-angle control unit that controls the angle of view of each photographing unit, and controls the angle of view of two or more of the photographing units until both eyes are included in the photographing range. The ophthalmologic apparatus according to any one of claims 1 to 4, which is a wide-angle control section that changes the angle to a wide-angle side. an optical system for acquiring ocular characteristics of an eye to be examined of a subject;
a drive control unit that controls driving of a relative movement mechanism that moves one of the eye to be examined and the optical system relative to the other;
a plurality of photographing units that photograph the subject's face from different directions;
a photographing range control unit that controls a photographing range in which a plurality of said photographing units photograph the face, and includes both eyes of said face within said photographing range of said two or more said photographing units; ,
a binocular photography control unit that causes each of the photography units including the both eyes within the photography range to execute photography of the both eyes;
a binocular detection unit that detects the binoculars from the binocular images for each of the binocular images based on the binocular images captured by each of the imaging units;
a coarse alignment control section that drives the relative movement mechanism via the drive control section based on the detection results of the binocular detection section to coarsely align the optical system with respect to the subject's eyes;
It has a function of changing the angle of view for each of the photographing units,
The photographing range control unit is a wide-angle control unit that controls the angle of view of each photographing unit, and controls the angle of view of two or more of the photographing units until both eyes are included in the photographing range. An ophthalmological device that is a wide-angle control unit that changes the angle to the wide-angle side. an eye imaging control unit that causes each of the imaging units to perform imaging of the eye to be examined when the rough alignment is completed;
a to-be-tested eye detection unit that detects the to-be-tested eye from the to-be-tested eye photographed image for each to-be-tested eye photographed image based on the to-be-tested eye photographed image photographed by the said photographing unit;
a relative position detection unit that detects a relative position of the eye to be examined with respect to the optical system based on a detection result of the eye to be examined detection unit;
Based on the detection result of the relative position detection section, the relative movement mechanism is driven via the drive control section to achieve precise alignment of the optical system with respect to the subject's eye, which is higher precision than the rough alignment. A precision alignment control unit that performs alignment;
a narrow-angle control unit that changes the angle of view of each of the imaging units to a narrow-angle side between the completion of the rough alignment and the start of imaging of the eye to be examined;
The ophthalmologic apparatus according to claim 5 or 6 , comprising: A plurality of multi-lens cameras each having a plurality of the photographing sections, each of which has a different angle of view of the photographing section;
The photographing range control unit selects the multi-lens camera that includes the both eyes within the photographing range of two or more of the photographing units from among the plurality of multi-lens cameras,
The ophthalmologic apparatus according to any one of claims 1 to 7 , wherein the binocular photography control unit causes the multi-eye camera selected by the photography range control unit to execute photography of the binoculars. an optical system for acquiring ocular characteristics of an eye to be examined of a subject;
a drive control unit that controls driving of a relative movement mechanism that moves one of the eye to be examined and the optical system relative to the other;
a plurality of photographing units that photograph the subject's face from different directions;
a photographing range control unit that controls a photographing range in which a plurality of said photographing units photograph the face, and includes both eyes of said face within said photographing range of said two or more said photographing units; ,
a binocular photography control unit that causes each of the photography units including the both eyes within the photography range to execute photography of the both eyes;
a binocular detection unit that detects the binoculars from the binocular images for each of the binocular images based on the binocular images captured by each of the imaging units;
a coarse alignment control section that drives the relative movement mechanism via the drive control section based on the detection results of the binocular detection section to coarsely align the optical system with respect to the subject's eyes;
A plurality of multi-lens cameras each having a plurality of the photographing sections, each of which has a different angle of view of the photographing section;
The photographing range control unit selects the multi-lens camera that includes the both eyes within the photographing range of two or more of the photographing units from among the plurality of multi-lens cameras,
An ophthalmological apparatus, wherein the binocular photography control unit causes the multi-eye camera selected by the photography range control unit to perform photography of both eyes. The photographing range control unit drives the relative movement mechanism via the drive control unit so that the one eye and the other eye are included in the photographing range of two or more of the photographing units. The ophthalmologic device according to any one of claims 1 to 4, wherein the ophthalmologic device is relatively moved to a position. The imaging range control section drives the relative movement mechanism via the drive control section to move the one relative to the other in a direction in which at least a working distance between the eye to be examined and the optical system increases. The ophthalmologic device according to claim 10 , which is moved relative to each other. The ophthalmologic apparatus according to any one of claims 1 to 11 , wherein the face is simultaneously photographed by each of the photographing units. The ophthalmologic apparatus according to any one of claims 1 to 12 , further comprising an interpupillary distance calculation unit that calculates an interpupillary distance of the both eyes based on the detection results of the binocular detection unit. a display control unit that displays the binocular captured images on a display unit when the binocular detection unit fails to detect both eyes;
a designation operation of specifying at least the two eyes for each of the binocular images on the display surface of the display unit when the display control unit displays the binocular images for each of the imaging units on the display unit; an operation reception section that accepts
Equipped with
The rough alignment control section drives the relative movement mechanism via the drive control section based on the specified operation when the specified operation is accepted by the operation reception section to perform the rough alignment. The ophthalmological device according to any one of Items 1 to 13 . The drive control unit controls driving of at least one of, as the relative movement mechanism, a subject movement mechanism that moves the subject or the face, and an optical system movement mechanism that moves the optical system. The ophthalmological device according to any one of items 1 to 14 . an optical system for acquiring eye characteristics of an eye to be examined of a subject; a drive control unit that controls driving of a relative movement mechanism that moves the other relative to one of the eye to be examined and the optical system; A method for controlling an ophthalmological apparatus including a plurality of photographing units that photograph an examiner's face from different directions,
a photographing range control step of controlling a photographing range in which a plurality of said photographing units photograph the face, and including both eyes of said face within said photographing range of said two or more said photographing units; ,
a binocular photographing control step of causing each of the photographing units including the both eyes within the photographing range to perform photographing of the both eyes;
a binocular detection step of detecting the binoculars from the binocular images for each of the binocular images based on the binocular images captured by each of the imaging units in the binocular photography control step;
a coarse alignment control step of driving the relative movement mechanism via the drive control unit based on the detection results of the binocular detection step to coarsely align the optical system with respect to the eyes to be examined;
a pre-photographing control step of causing each of the photographing units to perform pre-photographing of the face;
a preliminary eye detection step of detecting the eye to be examined from the pre-photographed image for each pre-photographed image based on the pre-photographed image of the pre-photographed for each of the photographing units;
has
The photographing range control step is activated when the number of pre-photographed images including the same eye to be examined is one or less based on the detection result of the pre-test eye detection step, and controls two or more of the photographing units. A method of controlling an ophthalmological apparatus including the both eyes within the photographing range . When the rough alignment is completed, a subject eye imaging control step of causing each of the imaging units to perform imaging of the subject's eye;
a to-be-tested eye detection step of detecting the to-be-tested eye from the to-be-tested eye photographed image for each to-be-tested eye photographed image based on the to-be-tested eye photographed image photographed by the said photographing unit;
a relative position detection step of detecting the relative position of the eye to be examined with respect to the optical system based on the detection result of the eye to be examined step;
Based on the detection result of the relative position detection step, the relative movement mechanism is driven via the drive control unit to achieve precise alignment of the optical system with respect to the eye to be examined, which is higher precision than the coarse alignment. a precision alignment control step for performing alignment;
The method for controlling an ophthalmological apparatus according to claim 16 , comprising:

Images