Ophthalmic device and ophthalmic system

Abstract

An ophthalmic device and an ophthalmic system are provided, which have: a head unit having an optical system capable of receiving light reflected by an eye to be measured, a driving mechanism that holds the head unit movably, a coordination position detection unit for detecting the relative position between the eye to be measured and the head unit, and a control unit that controls the driving mechanism; the driving mechanism has at least two arms rotatably connected, at least two first rotation support mechanisms for enabling the head unit to move, at least three second rotation support mechanisms, and at least five drive units for driving the rotation support mechanisms; the control unit can control the drive units using the measurement results of the coordination position measurement unit so that the head unit is aligned with the eye to be measured.

Description

Technical Field

[0001] The present disclosure relates to an ophthalmic device and an ophthalmic system for measuring or photographing an eye to be measured (the eye to be detected). Background Art

[0002] The ophthalmic device includes an ophthalmic measuring device for measuring the characteristics of the eye to be measured or an ophthalmic photographing device for acquiring an image of the eye to be measured. In order to measure or photograph the eye to be measured, it is necessary to adjust the position of the eye to be measured (the subject) and the ophthalmic device. Thus, an ophthalmic device capable of moving the position of the ophthalmic device relative to the eye to be measured has been proposed.

[0003] In Patent Document 1, there is disclosed an ophthalmic device in which a device main body is provided on a base portion by a drive portion. In the device main body described in Patent Document 1, an intraocular pressure measuring portion for measuring the intraocular pressure of the eye to be measured and an eye characteristic measuring portion for measuring other optical characteristics (eye characteristics) of the eye to be measured are provided.

[0004] The drive portion described in Patent Document 1 moves the device main body relative to the base portion in the vertical direction (Y-axis direction), the front-rear direction (Z-axis direction), and the left-right direction (X-axis direction) orthogonal to these directions. Specifically, the drive portion described in Patent Document 1 has a Y-axis drive portion, a Z-axis drive portion, and an X-axis drive portion, and functions as a sliding mechanism that causes the device main body to slide relative to the base portion in the vertical direction (Y-axis direction), the front-rear direction (Z-axis direction), and the left-right direction (X-axis direction).

[0005] Prior Art Documents

[0006] Patent Documents

[0007] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2018-51337 Summary of the Invention

[0008] Problems to be Solved by the Invention

[0009] However, a inspection portion including a measuring portion or a photographing portion is provided on the device main body. If a sliding mechanism for sliding the device main body is provided, there is a problem that the scale of the drive portion becomes large and it is difficult to miniaturize the ophthalmic device. In addition, if this mechanism is used to increase the movable range of the device main body and improve the degree of freedom, there is a problem that the drive portion becomes even larger. In addition, if a mechanism for freely changing the orientation or inclination of the inspection portion is provided, the device becomes even larger.

[0010] The present disclosure has been made to solve such problems, and an object thereof is to provide a small-sized ophthalmic device and an ophthalmic system with an increased degree of freedom in positioning of the measuring portion.

[0011] Means for solving the problem

[0012] To achieve the above object, an ophthalmic device of the present disclosure is for obtaining optical information of an eye to be measured, and includes: a head portion having an optical system capable of receiving light reflected by the eye to be measured, a driving mechanism for holding the head portion movably, a coordination position detection unit for detecting a relative position between the eye to be measured and the head portion, and a control unit for controlling the driving mechanism; the driving mechanism includes: at least two arms including a first arm portion and a second arm portion connected rotatably, at least two first rotation support mechanisms capable of rotating about a first axis to move the head portion, at least three second rotation support mechanisms including a first mechanism portion, a second mechanism portion, and a third mechanism portion capable of rotating about a second axis different from the direction of the first axis, at least five driving portions for driving the first rotation support mechanisms and the second rotation support mechanisms, and at least two support portions including a first support portion and a second support portion; the control unit can use the detection result of the coordination position detection unit to control the driving portions to align the head portion with the eye to be measured. The first mechanism portion is connected to the first support portion, the first arm portion is connected to the first mechanism portion, the second mechanism portion is connected to the first arm portion, the second arm portion is connected to the second mechanism portion, the third mechanism portion is connected to the second arm portion, the second support portion is connected to the third mechanism portion, and the head portion is supported by the second support portion. The control unit causes the first mechanism portion, the second mechanism portion, and the third mechanism portion to rotate synchronously about the second axis, so that the head portion moves horizontally on the optical axis of the optical system while keeping the tilt and orientation of the head portion fixed.

[0013] In addition, to achieve the above object, an ophthalmic system of the present disclosure is used to acquire optical information of an eye to be measured, and includes: a head unit having an optical system capable of receiving light reflected by the eye to be measured; a driving mechanism that holds the head unit in a movable manner; a coordination position detection unit for detecting the relative position between the eye to be measured and the head unit; a control unit for controlling the driving mechanism; and a terminal device that receives information related to the light received by the optical system through a network. The driving mechanism includes: at least two arms, including a first arm portion and a second arm portion connected in a rotatable manner; at least two first rotation support mechanisms capable of rotating about a first axis to enable the head unit to move; at least three second rotation support mechanisms, including a first mechanism portion, a second mechanism portion, and a third mechanism portion capable of rotating about a second axis in a direction different from the direction of the first axis; at least five driving units for driving the first rotation support mechanism and the second rotation support mechanism; and at least two support portions, including a first support portion and a second support portion. The control unit can use the detection result of the coordination position detection unit to control the driving unit to align the head unit with the eye to be measured. The first mechanism portion is connected to the first support portion, the first arm portion is connected to the first mechanism portion, the second mechanism portion is connected to the first arm portion, the second arm portion is connected to the second mechanism portion, the third mechanism portion is connected to the second arm portion, the second support portion is connected to the third mechanism portion, and the head unit is supported by the second support portion. The control unit causes the first mechanism portion, the second mechanism portion, and the third mechanism portion to rotate synchronously about the second axis, so that the head unit moves horizontally on the optical axis of the optical system while keeping the tilt and orientation of the head constant.

[0014] Effects of the Invention

[0015] According to the content of the present disclosure using the above means, an ophthalmic device and an ophthalmic system that are small in size and have an increased positioning freedom of the measurement unit can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram showing an ophthalmic device according to a first embodiment of the present disclosure.

[0017] Figure 2 It is a perspective view showing an ophthalmic device according to a first embodiment of the present disclosure.

[0018] Figure 3 It is a block diagram showing an ophthalmic device according to a first embodiment of the present disclosure.

[0019] Figure 4It is a schematic structural diagram showing a modification of the drive mechanism of the ophthalmic device according to the first embodiment of the present disclosure.

[0020] Figure 5 It is a perspective view showing another modification of the ophthalmic device according to the first embodiment of the present disclosure.

[0021] Figure 6 It is a perspective view showing a part of the ophthalmic device according to the second embodiment of the present disclosure.

[0022] Figure 7 It is a block diagram showing the ophthalmic device according to the second embodiment of the present disclosure.

[0023] Figure 8A It is a schematic top view showing the operation of the head part of the ophthalmic device according to the second embodiment of the present disclosure.

[0024] Figure 8B It is a schematic top view showing the operation of the head part of the ophthalmic device according to the second embodiment of the present disclosure.

[0025] Figure 9A It is a schematic side view showing the operation of the head part of the ophthalmic device according to the second embodiment of the present disclosure.

[0026] Figure 9B It is a schematic side view showing the operation of the head part of the ophthalmic device according to the second embodiment of the present disclosure.

[0027] Figure 10 It is a block diagram showing the ophthalmic system according to the third embodiment of the present disclosure. Detailed Embodiments

[0028] Hereinafter, embodiments of the present disclosure will be described based on the drawings.

[0029] (First Embodiment)

[0030] First, the first embodiment of the present disclosure will be described.

[0031] Figure 1 It is a side view showing the ophthalmic device according to the first embodiment. The ophthalmic device 10 of the present embodiment irradiates light to the eye E to be measured, and obtains information related to the characteristics of the eye E to be measured based on the detection result of the light reflected by the eye E to be measured. That is, the ophthalmic device 10 of the present embodiment is an ophthalmic device that examines the eye E to be measured based on the light reflected by the eye E to be measured. In the examination using an ophthalmic device, it generally includes measurement for obtaining the characteristics of the eye E to be measured and imaging for obtaining an image of the eye E to be measured.

[0032] As an example of an ophthalmic measuring device, an eye refractometer (refractometer, corneal astigmatometer) that measures the refractive characteristics of the eye to be measured, a tonometer, a corneal endothelial microscope that obtains corneal characteristics (corneal thickness, cell distribution, etc.), a wavefront analyzer that uses a Hartmann-Shack sensor to obtain aberration information of the eye to be measured, an axial length measuring device for the eye, and the like can be cited. Specifically, a refractometer measures the eye refraction by irradiating an annular image to the back of the eye and analyzing the reflected image from the back of the eye captured by a camera. In addition, a corneal astigmatometer measures the eye refraction by irradiating an annular image to the front of the eye and analyzing the reflected image captured by a front eye camera.

[0033] As an example of an ophthalmic imaging device, an optical coherence tomography scanner that uses optical coherence tomography (OCT) technology to obtain tomographic images, a fundus camera that captures fundus images of the fundus, a scanning laser ophthalmoscope (SLO) that uses a confocal optical system to obtain fundus images by laser scanning, a slit lamp that uses slit light to cut an optical section of the cornea to obtain an image, and the like can be cited.

[0034] Figure 1 is a schematic diagram showing the ophthalmic device 10 of the first embodiment. In addition, Figure ② is a perspective view showing a part of the drive mechanism 30 of the ophthalmic device 10 of the first embodiment. Figure 3 is a block diagram showing the connection state of the components of the ophthalmic device 10 of the first embodiment. Hereinafter, with reference to Figure 1 、 Figure 2 and Figure 3 the structure of the ophthalmic device 10 of the first embodiment will be described.

[0035] The ophthalmic device 10 of the first embodiment includes a head unit 20, a drive mechanism 30, a display unit 74, a base unit 80, a chin rest unit 81, and a forehead rest unit 82. The head unit 20 is provided on the base unit 80 by the drive mechanism 30.

[0036] The head unit 20 is provided with an intraocular pressure measurement unit (not shown) and an eye characteristic measurement unit (not shown). That is, the ophthalmic device 10 of the present embodiment is a composite ophthalmic device having an intraocular pressure measurement unit and an eye characteristic measurement unit. The intraocular pressure measurement unit measures the intraocular pressure of the eye to be measured. The eye characteristic measurement unit measures other optical characteristics (eye characteristics) of the eye to be measured. Among them, at least one of the measurement unit and the imaging unit provided inside the head unit 20 is not limited to the intraocular pressure measurement unit and the eye characteristic measurement unit. For example, the ophthalmic device 10 may be a composite ophthalmic device having an optical coherence tomograph that uses OCT to obtain tomographic images and a fundus camera that photographs the fundus. That is, the ophthalmic device 10 of the present embodiment may be only any one of the above-mentioned ophthalmic imaging devices and ophthalmic measurement devices, or may be a device composed of any combination. Thus, the head unit 20 is provided with an inspection unit, and the inspection unit includes at least one of an imaging unit having an imaging function inside and a measurement unit having a measurement function. In the present embodiment, the case where the head unit 20 has an intraocular pressure measurement unit and an eye characteristic measurement unit as the inspection unit will be described as an example.

[0037] The intraocular pressure measurement unit and the eye characteristic measurement unit provided in the head unit 20 each have an inspection optical system for optically inspecting the eye E to be measured. For example, the intraocular pressure measurement unit and the eye characteristic measurement unit each have an illumination optical system or an imaging optical system as the inspection optical system. The above-mentioned illumination optical system includes a light source 21 that irradiates illumination light to the anterior part or the fundus of the eye E to be measured, and the above-mentioned imaging optical system includes an imaging camera 22 (anterior part camera, fundus camera, etc.) for obtaining an anterior part image or a fundus image of the eye E to be measured. The light output from the light source 21 of the inspection optical system is irradiated onto the eye E to be measured as light rays parallel to the optical axis O1 of the inspection optical system. In addition, the head unit 20 is provided with a stereo camera 23 for adjusting the coordination position so that the eye E to be measured and the head unit 20 maintain an appropriate distance. The stereo camera 23 has at least two cameras for the coordination position, and the coordination position detection unit 72 described later can detect the relative position between the eye E to be measured and the head unit 20 through the image information captured by the two cameras for the coordination position.

[0038] The display unit 74 is formed of a liquid crystal display, and displays images such as an anterior segment image of the eye E to be measured or inspection results, etc. under the control of the control unit 71. In the present embodiment, for the display unit 74, the function of a touch panel is mounted as the operation unit 75, and operations such as measurement using the intraocular pressure measurement unit or the eye characteristic measurement unit or operations for moving the head unit 20 can be performed. For the display unit 74, the user can specify the image of the eye E to be measured through the touch panel, so that the head unit 20 can be moved centering on the specified part, or the head unit 20 can be automatically moved through coordinated position adjustment, thereby performing focusing and the like. In addition, the head unit 20 can also be manually moved by operating the operation unit 75. Further, for the operation for performing measurement, a measurement switch can be provided, and measurement can be performed by operating the measurement switch. In addition, for the operation for moving the head unit 20, a control lever or a movement operation switch can be provided, and the head unit 20 can be moved by operating the control lever or the movement operation switch.

[0039] The jaw support portion 81 and the forehead support portion 82 fix the position of the eye E to be measured relative to the ophthalmic device 10 by fixing the face of the subject relative to the head unit 20 during measurement. The jaw support portion 81 is the part where the subject places the chin, and the forehead support portion 82 is the part where the subject presses the forehead. The head unit 20 can be moved relative to the base portion 80 by the drive mechanism 30. Thus, the head unit 20 can be moved relative to the face of the subject fixed by the jaw support portion 81 and the forehead support portion 82, that is, can be moved relative to the eye E to be measured.

[0040] In the description of the present application, the direction of gravity is defined as the vertical direction, that is, the Y direction, and the directions perpendicular to the direction of gravity are defined as the X direction and the Z direction respectively. In addition, the direction indicating the plane defined by the X direction and the Z direction is defined as the horizontal direction. In addition, in Figure 1 , the left - right direction is set as the Z direction (the direction of the optical axis O1 of the inspection optical system).

[0041] The drive mechanism 30 can move the head unit 20 relative to the base portion 80 in the vertical direction and the horizontal direction. In addition, the head unit 20 can be tilted in any direction relative to the vertical direction or the horizontal direction.

[0042] The drive mechanism 30 includes: two arms, namely arm portions 31a and 31b; five rotational support mechanisms, namely rotational support mechanism portions 32a, 32b, 32c, 32d, and 32e; five drive portions 33a, 33b, 33c, 33d, and 33e for driving the respective rotational support mechanisms; and support portions 35a, 35b, 35c, and 35d. The rotational support mechanism portions 32a, 32b, 32c, 32d, and 32e are formed on the arm portions or the support portions and are capable of respectively rotating the other connected arm portion or support portion about axes 34a, 34b, 34c, 34d, and 34e. Specifically, it is a mechanism for rotatably holding a shaft body for connecting two members (arm portions and support portions). The drive portions 33a, 33b, 33c, 33d, and 33e generate driving forces for rotating the rotational support mechanism portions 32a, 32b, 32c, 32d, and 32e, and are, for example, motors. Specifically, for example, it is a mechanism in which a DC motor is combined with an encoder so as to be controllable at a specified rotation angle. In addition, each drive portion may also be a stepping motor. Further, the motor may be integrated with a reduction mechanism. In the specification of the present application, a structure in which the drive portion and the rotational support mechanism are integrated is illustrated. For example, the rotational support mechanism portion 32a and the drive portion 33a for driving the rotational support mechanism portion 32a are denoted as 32a(33a). In addition, the rotational support mechanism portion and the drive portion may be separately formed. For example, it may also be configured in such a manner that the rotational support mechanism portion is a mechanism for holding a shaft body using a bearing or the like, and the drive portion transmits a rotational driving force to the gear-equipped shaft body held by a bearing or the like through a reduction gear or the like.

[0043] Next, the structure of the drive mechanism 30 will be described in more detail. The arm portion 31a is connected to the base portion 80 through the support portion 35b and the support portion 35a fixed to the base portion 80 in sequence. More specifically, the support portion 35b is connected to the support portion 35a fixed to the base portion 80 in such a manner that it can rotate about the axis 34a through the rotational support mechanism portion 32a (equivalent to the first rotational support mechanism) provided in the support portion 35a. In addition, the arm portion 31a is connected to the support portion 35b in such a manner that it can rotate about the axis 34b through the rotational support mechanism portion 32b (equivalent to the second rotational support mechanism) provided in the support portion 35b. Next, the arm portion 31b is connected to the arm portion 31a in such a manner that it can rotate through the rotational support mechanism portion 32c (equivalent to the second rotational support mechanism) provided in the arm portion 31a. The arm portion 31b and the machine head portion 20 are connected through the support portion 35c and the support portion 35d. More specifically, the support portion 35c is connected to the arm portion 31b in such a manner that it can rotate about the axis 34d through the rotational support mechanism portion 32d (equivalent to the second rotational support mechanism) provided in the arm portion 31b. The support portion 35d is connected to the support portion 35c in such a manner that it can rotate about the axis 34e through the rotational support mechanism portion 32e (equivalent to the first rotational support mechanism) provided in the support portion 35c. In addition, each rotational support mechanism portion may also be provided on the side of the connected member.

[0044] In Figure 1 , Figure 2 the axes 34a and 34e are axes that can point in the Y direction, i.e., the vertical direction, and the two axes 34a and 34e are an example of the first axis in the present disclosure. The axes 34b, 34c, and 34d are axes that can point in the X direction, i.e., the horizontal direction, and the three axes 34b, 34c, and 34d are an example of the second axis in the present disclosure. In addition, during the operation of the drive mechanism 30, each axis does not necessarily exhibit the above relationship.

[0045] Figure 3FIG. is a block diagram showing the electrical connection state of the ophthalmic device 10 of the first embodiment. The control unit 71 is a control device built into the base unit 80. The control unit 71 can control the light source 21 to irradiate light into the eye E to be measured. In addition, the control unit 71 can receive information from the imaging camera 22, analyze the received captured image data, and display the captured image data and the analysis result on the display unit 74. The coordination position detection unit 72 can calculate information about the relative position between the head unit and the eye to be measured based on information from the stereo camera 23. The control unit 71 can control the necessary drive units among the drive units 33a, 33b, 33c, 33d, and 33e according to the information about the relative position calculated by the coordination position detection unit 72, so as to move the position of the head unit 20 to keep the head unit 20 in an appropriate positional relationship with the eye E to be measured.

[0046] The line-of-sight position detection unit 73 has the following functions: receiving the captured image data input by the imaging camera 22 through the control unit 71, detecting the line-of-sight position of the eye E to be measured, calculating the line-of-sight direction based on the detected line-of-sight position, and sending it to the control unit 71. The line-of-sight position detection unit 73 can, for example, detect the line-of-sight position of the eye E to be measured by using a line-of-sight direction detection method (corneal detection method) using Purkinje images. Near-infrared light is incident from the light source 21 into the eye E to be measured. On the surface of the cornea Ea of the eye E to be measured, a reflection image of the near-infrared light, that is, a Purkinje image, is generated by the incidence of the near-infrared light of the point light source. The position of this Purkinje image changes as the line-of-sight direction of the eye E to be measured changes. Therefore, the line-of-sight position detection unit 73 can detect the position coordinates C1 of the Purkinje image in the eye E to be measured based on the captured image data of the eye E to be measured input by the imaging camera 22. And the line-of-sight position detection unit 73 can detect the line-of-sight direction of the eye E to be measured based on the relative position (line-of-sight position) between the position of the Purkinje image indicated by the position coordinates C1 and the pupil center. In addition, other methods can also be used for the detection method of the line-of-sight direction.

[0047] The line-of-sight position detection unit 73 detects the relative position of the eye E to be measured with respect to the imaging camera 22 based on the captured image data. In addition, there is no particular limitation on the detection method of the relative position of the eye E to be measured. In this case, the line-of-sight position detection unit 73 functions as an eye position detection unit for detecting the relative position of the eye E to be measured with respect to the head unit 20.

[0048] Next, the operation of the ophthalmic device 10, particularly the drive mechanism 30, will be described. The control unit 71 can control the drive unit 33a to rotate the support unit 35b and the arm 31a connected thereto around the axis 34a, thereby changing the orientation (inclination) of the head portion 20 in the XZ plane. The control unit 71 can control the drive unit 33b to rotate the arm 31a around the axis 34b, thereby changing the position or inclination (orientation) of the head portion 20 in the X, Y, and Z directions. The control unit 71 can control the drive unit 33c to rotate the arm 31b around the axis 34c, thereby changing the position or inclination (orientation) of the head portion 20 in the X, Y, and Z directions. The control unit 71 can control the drive unit 33d to rotate the support unit 35c around the axis 34d, thereby changing the inclination (orientation) of the head portion 20. Furthermore, the control unit 71 can control the driving unit 33 e to rotate the support unit 35 d about the shaft 34 e , thereby changing the orientation (inclination) of the nose portion 20 .

[0049] In this manner, the control unit 71 can control the drive units 33a, 33b, 33c, 33d, and 33e to move the head 20 to any position within the XYZ space, tilt the head 20 in any direction, or change its orientation. The line-of-sight position detection unit 73 detects the line-of-sight position (detection result) of the eye under test E. The control unit 71 can use the line-of-sight direction based on this line-of-sight position (detection result) to control the drive units 33a, 33b, 33c, 33d, and 33e to adjust the orientation of the head 20 so that the optical axis O1 of the inspection optical system is approximately aligned with the line-of-sight direction. Furthermore, the drive units 33a, 33b, 33c, 33d, and 33e can be controlled to adjust the orientation of the head 20 so that the optical axis O1 of the inspection optical system deviates from the line-of-sight direction relative to the line-of-sight direction. For example, when photographing the fundus of the eye E of a subject with cataracts or acquiring tomographic images using OCT, the orientation of the handpiece 20 can be adjusted so that the optical axis O1 of the inspection optical system avoids the white, cloudy area in the lens of the eye E, thereby enabling examination of the subject with cataracts. In this way, the handpiece 20 can be positioned or oriented in any direction relative to the eye E, enabling examination of the eye E from any position or direction.

[0050] Furthermore, by synchronously controlling the driving units, the inclination and orientation of the nose section 20 can be kept constant while the nose section 20 is moved. Thus, the optical axis O1 of the inspection optical system can be moved to align with the direction toward the eye E being measured while maintaining the posture of the nose section 20.

[0051] In addition, by synchronously controlling each drive unit, it is possible to change the tilt angle and orientation of the machine head 20 while keeping the optical axis O1 of the inspection optical system passing through the center of rotation of the eye to be measured E, that is, the eye rotation point, or passing near it (approximate eye rotation point).

[0052] The coordination position detection unit 72 can calculate information on the relative position between the machine head 20 and the eye to be measured E based on the information from the stereo camera 23. For example, when it is determined that the relative position between the machine head 20 and the eye to be measured E is far from the appropriate position, that is, when it is determined that the distance in the X direction is far, the control unit 71 synchronously controls the drive units 33d, 33c, and 33b to drive, thereby maintaining the posture of the machine head 20 and keeping the position in the Y direction, and automatically moving the machine head 20 in the Figure 1 Z direction in to the right direction. The control unit 71 can control the drive mechanism 30 to move the machine head 20 according to the distance information from the coordination position detection unit 72, or can also use the information related to the relative position sequentially output from the coordination position detection unit 72 for feedback control to move the machine head 20.

[0053] In addition, the control unit 71 can also control each drive unit according to the operation from the operation unit 75, so as to move the machine head 20 and the like.

[0054] As described above, according to the ophthalmic device 10 of the embodiment of the present disclosure, it is possible to provide a small ophthalmic device 10 that does not use a sliding mechanism and has an increased positioning degree of freedom of the machine head 20. In addition, while increasing the positioning degree of freedom of the machine head 20, the structure can be simplified. In addition, the control unit 71 controls the drive mechanism 30 according to the information from the coordination position detection unit 72, so that the machine head 20 can be automatically adjusted to an appropriate positional relationship with the eye to be measured E.

[0055] (Modification of the first embodiment)

[0056] A modification of the ophthalmic device 10 of the first embodiment will be described. Different from the first embodiment, one arm moves in a manner that can only rotate in the horizontal direction. Figure 4 It is a schematic structural diagram showing a modification of the drive mechanism of the ophthalmic device of the first embodiment, and is a diagram enlarging the drive mechanism 30' part of the ophthalmic device 10.

[0057] The drive mechanism 30' has: two arms, namely arm portions 31a' and 31b'; five rotational support mechanisms, namely rotational support mechanism portions 32a', 32b', 32c', 32d', and 32e'; five drive portions 33a', 33b', 33c', 33d', and 33e' for driving the respective rotational support mechanisms; and support portions 35a', 35b', 35c', and 35d'. The rotational support mechanism portions 32a', 32b', 32c', 32d', and 32e' are formed on the arm portions or the support portions, and can respectively rotate the other connected arm portion or support portion about axes 34a', 34b', 34c', 34d', and 34e'.

[0058] Next, the structure of the drive mechanism 30' will be described in more detail. The arm portion 31a' is connected to the base portion 80 in such a manner that it can rotate about the axis 34a' through the support portion 35a' fixed to the base portion 80 and the rotational support mechanism portion 32a' (equivalent to the second rotational support mechanism) provided in the support portion 35a'. Thus, the arm portion 31a' can move in a manner that rotates in the horizontal direction. The arm portion 31b' is connected to the arm portion 31a' through the support portion 35b'. More specifically, the support portion 35b' is connected to the arm portion 31a' in such a manner that it can rotate about the axis 34b' through the rotational support mechanism portion 32b' (equivalent to the second rotational support mechanism) provided in the arm portion 31a'. The arm portion 31b' is connected to the support portion 35b' in such a manner that it can rotate about the axis 34c' through the rotational support mechanism portion 32c' (equivalent to the first rotational support mechanism) provided in the support portion 35b'. The arm portion 31b' and the machine head portion 20 are connected through the support portions 35c' and 35d'. More specifically, the support portion 35c' is connected to the arm portion 31b' in such a manner that it can rotate about the axis 34d' through the rotational support mechanism portion 32d' (equivalent to the first rotational support mechanism) provided in the arm portion 31b'. The support portion 35d' is connected to the support portion 35c' in such a manner that it can rotate about the axis 34e' through the rotational support mechanism portion 32e' (equivalent to the second rotational support mechanism) provided in the support portion 35c'. In addition, each rotational support mechanism portion may also be provided on the side of the connected member.

[0059] In Figure 4 , the axes 34c' and 34d' are axes that can point in the X direction, i.e., the horizontal direction, and the two axes 34c' and 34d' are an example of the first axis in the present disclosure. Additionally, the axes 34a', 34b', and 34e' are axes that can point in the Y direction, i.e., the vertical direction, and the three axes 34a', 34b', and 34e' are an example of the second axis in the present disclosure. Furthermore, during the operation of the drive mechanism 30', the respective axes do not necessarily exhibit the above relationships.

[0060] Next, the operation of the drive mechanism 30' will be described. The control unit 71 can rotate the arm portion 31a' about the axis 34a' by controlling the drive unit 33a', thereby changing the position or orientation (tilt) of the machine head portion 20 in the X, Y, and Z directions. The control unit 71 can rotate the support portion 35b' about the axis 34b' by controlling the drive unit 33b', thereby changing the position or orientation (tilt) of the machine head portion 20 in the X, Y, and Z directions. The control unit 71 can rotate the arm portion 31b' about the axis 34c' by controlling the drive unit 33c', thereby changing the position or tilt (orientation) of the machine head portion 20 in the X, Y, and Z directions. The control unit 71 can rotate the support portion 35c' about the axis 34d' by controlling the drive unit 33d', thereby changing the tilt (orientation) of the machine head portion 20. The control unit 71 can rotate the support portion 35d' about the axis 34e' by controlling the drive unit 33e', thereby changing the orientation (tilt) of the machine head portion 20. Thus, the control unit 71 can move the machine head portion 20 to any position in the XYZ space, or tilt the machine head portion 20 in any direction, or change its orientation by controlling the drive units 33a', 33b', 33c', 33d', and 33e'.

[0061] As described above, even when using a drive mechanism having such a structure, that is, one arm portion moves in a manner that can only rotate in the horizontal direction, two of the five axes point in the horizontal direction, and three axes point in the vertical direction, the machine head portion 20 can be moved to any position in the XYZ space, or tilted in any direction, or its orientation can be changed, in the same manner as in the first embodiment.

[0062] (Another modification of the first embodiment)

[0063] Another modification of the ophthalmic device 10 of the first embodiment will be described. Different from the first embodiment, a rotational support mechanism portion is further provided between the two arm portions. Figure 5 It is a schematic perspective view showing another modification of the drive mechanism of the ophthalmic device of the first embodiment.

[0064] The drive mechanism 30” has: two arms, namely arm parts 31a” and 31b”; six rotational support mechanisms, namely rotational support mechanism parts 32a”, 32b”, 32c”, 32d”, 32e”, and 32f”; six drive parts 33a”, 33b”, 33c”, 33d”, 33e”, and 33f” for driving the respective rotational support mechanisms; and support parts 35a”, 35b”, 35c”, 35d”, and 35e”. The rotational support mechanism parts 32a”, 32b”, 32c”, 32d”, 32e”, and 32f” are formed on the arm part or the support part, and can respectively rotate the other connected arm part or support part about axes 34a”, 34b”, 34c”, 34d”, 34e”, and 34f”.

[0065] Next, a more detailed description of the structure of the drive mechanism 30” will be given. The arm part 31a” is connected to the base part 80 through the support part 35b” and the support part 35a” fixed to the base part 80 in sequence. More specifically, the support part 35b” is connected to the support part 35a” fixed to the base part 80 in such a manner that it rotates about the axis 34a” through the rotational support mechanism part 32a” (equivalent to the first rotational support mechanism) provided in the support part 35a”. In addition, the arm part 31a” is connected to the support part 35b” in such a manner that it rotates about the axis 34b” through the rotational support mechanism part 32b” (equivalent to the second rotational support mechanism) provided in the support part 35b”. Next, the arm part 31b” is connected to the arm part 31a” through the support part 35c”. More specifically, the support part 35c” is connected to the arm part 31a” in such a manner that it rotates about the axis 34c” through the rotational support mechanism part 32c” (equivalent to the first rotational support mechanism) provided in the arm part 31a”. The arm part 31b” is connected to the support part 35c” in such a manner that it rotates about the axis 34d” through the rotational support mechanism part 32d” (equivalent to the second rotational support mechanism) provided in the support part 35c”. The arm part 31b” is connected to the machine head part 20 through the support part 35d” and the support part 35e”. More specifically, the support part 35d” is connected to the arm part 31b” in such a manner that it rotates about the axis 34e” through the rotational support mechanism part 32e” (equivalent to the first rotational support mechanism) provided in the arm part 31b”. The support part 35e” is connected to the support part 35d” in such a manner that it rotates about the axis 34f” through the rotational support mechanism part 32f” (equivalent to the second rotational support mechanism) provided in the support part 35d”. In addition, each rotational support mechanism part can also be provided on the side of the connected member.

[0066] In Figure 5Among them, the shafts 34a", 34c", and 34e" are shafts that can point in the Y direction, i.e., the vertical direction. The three shafts 34a", 34c", and 34e" are an example of the first shaft in the present disclosure. In addition, the shafts 34b", 34d", and 34f" are shafts that can point in the X direction, i.e., the horizontal direction. The three shafts 34b", 34d", and 34f" are an example of the second shaft in the present disclosure. In addition, during the operation of the drive mechanism 30", the various shafts do not necessarily exhibit the above relationships.

[0067] Next, the operation of the drive mechanism 30" will be described. The control unit 71 can cause the support portion 35b" and the arm portion 31a" connected thereto to rotate about the shaft 34a" through the drive portion 33a", thereby changing the orientation (tilt) of the machine head 20 in the XZ plane. The control unit 71 can cause the arm portion 31a" to rotate about the shaft 34b" by controlling the drive portion 33b", thereby changing the position or tilt (orientation) of the machine head 20 in the X, Y, and Z directions. The control unit 71 can cause the support portion 35c" to rotate about the shaft 34c" by controlling the drive portion 33c", thereby changing the position or tilt (orientation) of the machine head 20 in the X, Y, and Z directions. The control unit 71 can cause the arm portion 31b" to rotate about the shaft 34d" by controlling the drive portion 33d", thereby changing the position or tilt (orientation) of the machine head 20 in the X, Y, and Z directions. The control unit 71 can cause the support portion 35d" to rotate about the shaft 34e" by controlling the drive portion 33e", thereby changing the tilt (orientation) of the machine head 20. The control unit 71 can cause the support portion 35e" to rotate about the shaft 34f" by controlling the drive portion 33f", thereby changing the orientation (tilt) of the machine head 20.

[0068] As described above, by using a drive mechanism having a structure in which three shafts point in the horizontal direction and three shafts point in the vertical direction, the control unit 71 can move the machine head 20 to any position in the XYZ space, or tilt the machine head 20 in any direction, or change its orientation by controlling the drive portions 33a", 33b", 33c", 33d", 33e", and 33f". Since the drive mechanism 30" has six rotatable shafts, the movement of the machine head 20 can be made smoother compared to the case of having five rotatable shafts.

[0069] In addition, in the drive mechanism 30 of the present embodiment, the number of arms is not limited to two, and may be three or more. In addition, the number of rotational support mechanism portions may be five or more, and the number of drive portions may be five or more.

[0070] (Second Embodiment)

[0071] Next, a second embodiment of the present disclosure will be described. The ophthalmic device 10A of the second embodiment can simultaneously acquire information on the eyes to be examined of both eyes of the subject. In order to be able to examine both eyes of the subject simultaneously, it has head portions for each of the two eyes.

[0072] Figure 6 FIG. is a perspective view showing the head portion and the drive mechanism portion in the ophthalmic device 10A of the second embodiment. Figure 6 The head portions 20L, 20R, the drive mechanisms 30L, 30R, and the frame portion 85 of the ophthalmic device 10A are shown, and the illustration of other components is omitted. In addition, although the chin rest portion or the forehead rest portion shown in the first embodiment is not shown, it may be provided on the ophthalmic device 10A in order to fix the face of the subject. Figure 7 FIG. is a block diagram showing the connection state of the components of the ophthalmic device 10A of the second embodiment. Next, with reference to Figure 6 and Figure 7 the structure of the ophthalmic device 10A of the second embodiment will be described. In addition, the same reference numerals are given to the same structures as those in the first embodiment, and the description thereof is omitted. Further, the eye to be examined on the left side is set as the eye to be examined EL, and the reference numeral EaL represents the corneal portion of the eye to be examined EL. Similarly, the eye to be examined on the right side is set as the eye to be examined ER, and the reference numeral EaR represents the corneal portion of the eye to be examined ER.

[0073] In Figure 6 , a column (not shown) is supported on the base portion of the ophthalmic device 10A, the left drive mechanism 30L and the right drive mechanism 30R are connected to the frame portion 85 fixed to the column, the left head portion 20L is connected to the left drive mechanism 30L, and the right head portion 20R is connected to the right drive mechanism 30R. That is, the head portion and the drive mechanism are composed of two sets on the left and right sides, and the two head portions 20L, 20R can respectively receive the light reflected by the eyes to be examined EL, ER on the left and right sides of the subject.

[0074] The drive mechanism 30L includes: two arms, namely, arm portions 31aL, 31bL, six rotational support mechanisms, namely, rotational support mechanism portions 32aL, 32bL, 32cL, 32dL, 32eL, 32fL, six drive portions 33aL, 33bL, 33cL, 33dL, 33eL, 33fL for driving each rotational support mechanism, and support portions 35aL, 35bL, 35cL, 35dL. The rotational support mechanism portions 32aL, 32bL, 32cL, 32dL, 32eL, 32fL are formed on the arm portion or the support portion, and can respectively rotate the other arm portion or support portion connected thereto about axes 34aL, 34bL, 34cL, 34dL, 34eL, 34fL.

[0075] Next, the structure of the drive mechanism 30L will be described in more detail. The arm portion 31aL is connected to the frame portion 85 through the support portion 35aL. More specifically, the support portion 35aL is connected in such a manner that it rotates about the shaft 34aL through the rotational support mechanism portion 32aL (equivalent to the first rotational support mechanism) provided in the support portion 35aL. In addition, the arm portion 31aL is connected to the support portion 35aL in such a manner that it rotates about the shaft 34bL through the rotational support mechanism portion 32bL (equivalent to the second rotational support mechanism) provided in the arm portion 31aL. Next, the arm portion 31bL is connected to the arm portion 31aL through the support portion 35bL. More specifically, the support portion 35bL is connected to the arm portion 31aL in such a manner that it rotates about the shaft 34cL through the rotational support mechanism portion 32cL (equivalent to the second rotational support mechanism) provided in the support portion 35bL. The arm portion 31bL is connected to the support portion 35bL in such a manner that it rotates about the shaft 34dL through the rotational support mechanism portion 32dL (equivalent to the first rotational support mechanism) provided in the arm portion 31bL. The arm portion 31bL and the machine head portion 20L are connected through the support portion 35cL and the support portion 35dL. More specifically, the support portion 35cL is connected to the arm portion 31bL in such a manner that it rotates about the shaft 34eL through the rotational support mechanism portion 32eL (equivalent to the second rotational support mechanism) provided in the support portion 35cL. The support portion 35dL is connected to the support portion 35cL in such a manner that it rotates about the shaft 34fL through the rotational support mechanism portion 32fL (equivalent to the first rotational support mechanism) provided in the support portion 35dL. The machine head portion 20L is connected to the support portion 35dL. In addition, each rotational support mechanism portion may also be provided on the side of the connected member.

[0076] In Figure 6 the shafts 34aL, 34dL, and 34fL are shafts that can point in the Y direction, i.e., the vertical direction, and the three shafts 34aL, 34dL, and 34fL are an example of the first axis in the present disclosure. In addition, the shafts 34bL, 34cL, and 34eL are shafts that can point in the X direction, i.e., the horizontal direction, and the three shafts 34bL, 34cL, and 34eL are an example of the second axis in the present disclosure. In addition, during the operation of the drive mechanism 30L, each shaft does not necessarily exhibit the above relationship.

[0077] The drive mechanism 30R has a shape symmetrical to that of the drive mechanism 30L. Each structure of the drive mechanism 30R is equivalent to the structure obtained by replacing the reference numeral "L" attached in the description of the drive mechanism 30L with "R", and has the same function as the drive mechanism 30L.

[0078] The machine head 20L on the left side and the machine head 20R on the right side are provided in pairs, corresponding to the measured eyes on the left and right sides of the subject respectively. The machine head 20L on the left side obtains information of the measured eye EL on the left side of the subject, and the machine head 20R on the right side obtains information of the measured eye ER on the right side of the subject.

[0079] On the machine head 20L on the left side, a reflector 24L serving as a deflection member is provided, and information of the measured eye EL corresponding to the inspection optical system can be obtained through the reflector 24L. On the machine head 20L on the left side, an inspection optical system for obtaining eye information of the measured eye EL is provided. The inspection optical system includes a photographing optical system and the like. The photographing optical system includes: an illumination optical system having a light source 21L for irradiating illumination light to the front part or fundus of the measured eye EL, and a photographing camera 22L for obtaining a front part image or fundus image of the measured eye EL. In addition, the machine head 20L has a stereo camera 23L, and the stereo camera 23L is used to adjust the coordinated position between the measured eye EL and the machine head 20L so that the measured eye EL and the machine head 20L maintain an appropriate distance.

[0080] In addition, each structure of the machine head 20R on the right side is equivalent to the structure obtained by replacing the reference numeral "L" attached in the description of the machine head 20L on the left side with "R", and has the same function as the machine head 20L on the left side.

[0081] Figure 7 The block diagram is the diagram corresponding to the block diagram shown in the first embodiment and the machine heads 20L, 20R on the left and right sides and the drive mechanisms 30L, 30R on the left and right sides. Figure 3 shown in the block diagram corresponding to the machine heads 20L, 20R on the left and right sides and the drive mechanisms 30L, 30R on the left and right sides.

[0082] Next, the operation of the drive mechanism 30L will be described. The control unit 71 can control the drive unit 33aL to rotate the support unit 35aL and the arm unit 31aL connected thereto about the axis 34aL, thereby changing the orientation (tilt) of the machine head 20L in the XZ plane. The control unit 71 can control the drive unit 33bL to rotate the arm unit 31aL about the axis 34bL, thereby changing the position or tilt (orientation) of the machine head 20L in the X, Y, and Z directions. The control unit 71 can control the drive unit 33cL to rotate the support unit 35bL about the axis 34cL, thereby changing the position or tilt (orientation) of the machine head 20L in the X, Y, and Z directions. The control unit 71 can control the drive unit 33dL to rotate the arm unit 31bL about the axis 34dL, thereby changing the position or tilt (orientation) of the machine head 20L in the X, Y, and Z directions. The control unit 71 can control the drive unit 33eL to rotate the support unit 35cL about the axis 34eL, thereby changing the tilt (orientation) of the machine head 20L. The control unit 71 can control the drive unit 33fL to rotate the support unit 35dL about the axis 34fL, thereby changing the orientation (tilt) of the machine head 20L. For the operation of the drive mechanism 30R, similarly, it is the operation achieved by replacing the reference numeral "L" attached to the description of the operation of the drive mechanism 30L with "R".

[0083] In this way, the control unit 71 can move the machine heads 20L and 20R to any position in the XYZ space, or tilt the machine heads 20L and 20R in any direction, or change their orientations by controlling the drive mechanisms 30L and 30R, that is, the drive units 33aL, 33bL, 33cL, 33dL, 33eL, and 33fL, 33aR, 33bR, 33cR, 33dR, 33eR, and 33fR. Therefore, the machine heads 20L and 20R can be positioned at any position or oriented in any direction with respect to the eyes under test EL and ER, so that inspections can be performed from any position and any direction of the eyes under test EL and ER. In addition, the control unit 71 can use the detection results of the coordinated position detection unit 72 to control the drive mechanisms 30L and 30R respectively to align the machine heads 20L and 20R with the eyes under test EL and ER.

[0084] The line-of-sight position detection unit 73 has the following functions: receiving the captured image data of the left and right eyes under test EL and ER input by 22L and 22R through the control unit 71, detecting the line-of-sight positions of the eyes under test EL and ER, calculating the line-of-sight directions based on the detected line-of-sight positions, and sending them to the control unit 71.

[0085] Next, refer to Figure 8A 、 Figure 8BA description will be given of the case where the head portions 20L and 20R are rotated in the XZ plane direction about the center of rotation of each eyeball of the eyes to be measured EL and ER, i.e., the center of rotation of the eyeball. Figure 8A , Figure 8B is a schematic plan view when the ophthalmic device 10A is observed from above.

[0086] Figure 8A This is the state in which the eyes to be measured EL and ER are directed toward the principal visual plane (-Z direction). Figure 8B The state in which the eyes to be measured EL and ER are directed toward the near vision direction is shown. In order to make the eyes to be measured EL and ER assume a near vision state, it can be achieved by guiding the lines of sight of the eyes to be measured EL and ER using a fixation target (not shown). Each eye to be measured changes the direction of its line of sight about the center of rotation of the eyeball.

[0087] In the ophthalmic device 10A, for example, when performing a quantitative examination of strabismus in near vision, the control unit 71 controls the drive mechanisms 30L and 30R to rotate the head portions 20L and 20R about the center of rotation of the eyeball of the eye to be measured EL or a position of approximately the center of rotation of the eyeball near thereto, and instructs fixation on the fixation target, which is displayed at the fixation point PO at a position in front of the eye to be measured E at the examination distance. Thereby, the eyes to be measured EL and ER can be converged and fixated on the fixation target. Here, when either or both of the eyes to be measured EL and ER cannot fixate as a strabismic eye, the control unit 71 can control the drive mechanisms 30L and 30R separately to rotate the head portion so as to match the convergence angle θ to each eye to be measured.

[0088] Next, with reference to Figure 9A , Figure 9B , a description will be given of the case where the head portion 20L is rotated in the YZ plane direction about the center of rotation of the eyeball of the eye to be measured EL. Although the following description is for the left head portion 20L and the eye to be measured EL, the same relationship holds for the right head portion 20R and the eye to be measured ER. Figure 9A , Figure 9B is a schematic side view showing the structure on the left side of the ophthalmic device 10A. Figure 9A This is the state in which the eye to be measured EL is directed toward the principal visual plane (-Z direction). Figure 9B This is the state in which the eye to be measured EL is directed downward. In order to direct the eye to be measured EL downward, it can be achieved by guiding the line of sight of the eye to be measured EL using a fixation target (not shown). The eye to be measured changes the direction of its line of sight about the center of rotation of the eyeball.

[0089] In the ophthalmic device 10A, for example, when the line-of-sight direction of the eye to be measured is directed upward and downward, a fixation target is displayed in the vertical direction of the eye to be measured EL to guide the line of sight. The control unit 71 can control the drive mechanism 30L to rotate the head unit 20L about the eye rotation point of the eye to be measured EL or a substantially eye rotation point position near it.

[0090] The left and right head units 20L and 20R are respectively connected to independent drive mechanisms 30L and 30R. Therefore, the left and right eyes to be measured EL and ER can be respectively examined in independent directions.

[0091] As described above, since the left and right head units 20L and 20R can be freely rotated in the XZ plane direction and the YX plane direction, for the eye to be measured during an examination or the like, it is possible to cooperate with any line-of-sight directions of near and far, up and down, and left and right. In addition, the optical axes of the examination optical systems can be independently set for the left and right eyes to be measured EL and ER. Therefore, for example, when the subject is a strabismus patient, even if the line-of-sight direction (visual axis) of one eye to be measured (for example, the eye to be measured EL) is aligned with the fixation target, the line-of-sight direction of the other eye to be measured (for example, the eye to be measured ER) will deviate from the fixation target. At this time, the control unit 71 can control the orientation of the head unit 20 (for example, the head unit 20R) according to the line-of-sight direction of the other eye to be measured (for example, the eye to be measured ER). In addition, in the detection of the line-of-sight direction, the detection results of the line-of-sight positions of the eyes to be measured EL and ER provided by the line-of-sight position detection unit 73 can be used. In this way, it is possible to separately handle examinations and shootings (strabismus examinations in subjective examinations and peripheral shootings in fundus photography) performed in a state where the optical axis of the examination optical system coincides with the line-of-sight direction (visual axis) of the eye to be measured and a state where it does not coincide with the line-of-sight direction (visual axis). In addition, as a usage example in a state where it does not coincide with the line-of-sight direction (visual axis), it is possible to separately avoid the white cloudy parts in the lenses of the left and right eyes to be measured E of a cataract patient and perform examinations or the like on the target positions.

[0092] In the above description, although the number of arms in the drive mechanisms 30L and 30R is 2, it is not limited to 2, and may be 3 or more. In addition, the number of rotational support mechanism parts does not have to be 6, as long as it is 5 or more, and the number of drive parts also only needs to be 5 or more.

[0093] (Third Embodiment)

[0094] Next, a third embodiment of the present disclosure will be described. The ophthalmic system 1 of the third embodiment is a system that connects the ophthalmic devices 10 and 10A of the first embodiment and the second embodiment to a network and can perform ophthalmic examinations or the like remotely.

[0095] Figure 10 It should be noted that in the provided text, there is an inconsistent "Figure ②" which might be an error. I have translated it as "Figure ②" as it is in the original, but it's likely supposed to be "Figure 2".It is a block diagram showing the ophthalmic system 1 of the third embodiment. The ophthalmic system 1 of this embodiment is configured by connecting to a terminal device 90 and an ophthalmic device 10(10A) used on the user side via a network NW such as the Internet or a VPN (Virtual Private Network). The terminal device 90 can be a portable terminal such as a PC (personal computer), a smartphone, a tablet PC, or a mobile phone, for example.

[0096] According to the ophthalmic system 1 of this embodiment, it is possible to send examination information of the ophthalmic device 10(10A) to the terminal device 90 via the network NW. In addition, it is possible to control the drive mechanism 30 etc. by the control unit 71 from the terminal device 90 via the network NW. As a result, for example, when the physical distance between the subject and the doctor is far (for example, in a distant place), it is possible to support the doctor in diagnosing the subject's eye. In addition, a doctor in a distant place can control the drive mechanism 30 etc. by operating the terminal device 90, thereby adjusting the positional relationship between the subject's eye and the head unit.

[0097] As described above, several embodiments of the present disclosure have been described. However, these embodiments can also be implemented in various other ways, and various omissions, substitutions, and changes can be made as long as the gist of the invention is not departed from. These embodiments or their modifications are included in the scope and gist of the invention, and similarly, are also included in the invention described in the claims and its equivalents.

[0098] In addition, in the above embodiment, the coordination position is measured using a stereo camera, but it is not limited to this. For example, the following method can also be adopted, that is, the head unit has a coordination position light source and a line sensor, the line sensor receives the light irradiated by the coordination position light source and reflected by the detected eye, and the relative position between the detected eye and the head unit is detected based on the information from the line sensor, thereby adjusting the coordination position.

Claims

1. An ophthalmic device for obtaining optical information of an eye to be measured, characterized in that the ophthalmic device has: A head unit having an optical system capable of receiving light reflected by the eye to be measured, A drive mechanism that holds the head unit in a movable manner, A coordination position detection unit for detecting the relative position between the eye to be measured and the head unit, and A control unit that controls the drive mechanism; The drive mechanism has: At least two arms including a first arm portion and a second arm portion connected in a rotatable manner, At least two first rotation support mechanisms capable of rotating about a first axis so that the head unit can move, At least three second rotation support mechanisms including a first mechanism portion, a second mechanism portion, and a third mechanism portion capable of rotating about a second axis in a direction different from the direction of the first axis, At least five drive units for driving the first rotation support mechanism and the second rotation support mechanism, and At least two support portions including a first support portion and a second support portion; The control unit can use the detection result of the coordination position detection unit to control the drive unit so that the head unit is aligned with the eye to be measured, The first mechanism portion is connected to the first support portion, the first arm portion is connected to the first mechanism portion, the second mechanism portion is connected to the first arm portion, the second arm portion is connected to the second mechanism portion, the third mechanism portion is connected to the second arm portion, the second support portion is connected to the third mechanism portion, and the head unit is supported by the second support portion, The control unit causes the first mechanism portion, the second mechanism portion, and the third mechanism portion to rotate synchronously about the second axis, so that the head unit moves horizontally on the optical axis of the optical system while keeping the tilt and orientation of the head fixed.

2. The ophthalmic device according to claim 1, characterized in that The first axis can point in the vertical direction, and the second axis can point in the horizontal direction orthogonal to the first axis.

3. The ophthalmic device according to claim 1, characterized in that The control unit can control the drive unit to move the head unit to keep the optical axis of the optical system passing through the eye rotation center of the eye to be measured or a approximate eye rotation center near it.

4. The ophthalmic device according to claim 1, characterized in that The control unit can control the drive unit to make the optical axis of the optical system coincide with the direction toward the eye to be measured while keeping the posture of the head unit.

5. The ophthalmic device according to claim 1, characterized in that The head unit has two cameras for coordination position, The coordination position detection unit detects the relative position between the eye to be measured and the head unit through the image information captured by the two cameras for coordination position.

6. The ophthalmic device according to claim 1, characterized in that The head unit has a coordination position light source and a line sensor, The coordination position detection unit receives the light irradiated by the coordination position light source and reflected by the eye to be measured with the line sensor, and detects the relative position between the eye to be measured and the machine head based on the information from the line sensor.

7. The ophthalmic device according to claim 1, wherein: The optical system includes a fundus camera, and the fundus camera can capture a fundus image of the eye to be measured using the light reflected by the eye to be measured.

8. The ophthalmic device according to claim 1, wherein: The optical system includes an anterior segment camera, and the anterior segment camera can capture an anterior segment of the eye to be measured using the light reflected by the eye to be measured.

9. The ophthalmic device according to claim 1, wherein: It further includes a gaze position detection unit that detects the gaze position of the eye to be measured, and the control unit can use the detection result of the gaze position of the gaze position detection unit to control the drive unit to align the machine head with the eye to be measured.

10. An ophthalmic system for acquiring optical information of an eye to be measured, characterized by comprising: A machine head having an optical system capable of receiving light reflected by the eye to be measured, A drive mechanism that holds the machine head in a movable manner, A coordination position detection unit for detecting the relative position between the eye to be measured and the machine head, A control unit that controls the drive mechanism, and A terminal device that receives information related to the light received by the optical system through a network; The drive mechanism includes: At least two arms, including a first arm portion and a second arm portion connected in a rotatable manner, At least two first rotation support mechanisms capable of rotating about a first axis to enable the machine head to move, At least three second rotation support mechanisms, including a first mechanism portion, a second mechanism portion, and a third mechanism portion capable of rotating about a second axis different from the direction of the first axis, At least five drive units for driving the first rotation support mechanism and the second rotation support mechanism, and At least two support portions, including a first support portion and a second support portion; The control unit can use the detection result of the coordination position detection unit to control the drive unit to align the machine head with the eye to be measured, The first mechanism portion is connected to the first support portion, the first arm portion is connected to the first mechanism portion, the second mechanism portion is connected to the first arm portion, the second arm portion is connected to the second mechanism portion, the third mechanism portion is connected to the second arm portion, the second support portion is connected to the third mechanism portion, and the machine head is supported by the second support portion, The control unit causes the first mechanism portion, the second mechanism portion, and the third mechanism portion to rotate synchronously about the second axis, so that the machine head moves horizontally on the optical axis of the optical system while keeping the tilt and orientation of the head fixed.

Images