JP2017012536A - Ophthalmic microscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ophthalmic microscope which allows an operator and an assistant to observe an image on an observation portion, without generation of optical loss, with a simplified structure.SOLUTION: An ophthalmic microscope comprises: an illumination system; a light reception system; a main ocular system; a sub ocular system; and a control part. The illumination system radiates illumination light to an eye to be examined. The light reception system comprises a left imaging element and a right imaging element, and guides return light of the illumination light which is radiated to the eye to be examined to the left imaging element and the right imaging element. The main ocular system comprises a left display part, a left ocular lens system, a right display part and a right ocular lens system. The sub ocular system comprises a pair of display parts and a pair of ocular lens systems. The control part controls the left display part to display an image based on an output from the left imaging element, and controls the right display part to display an image based on an output from the right imaging element. The control part rotates the image based on the output from at least one of the left imaging element and the right imaging element according to a position of the sub ocular system to the main ocular system, for displaying the image on the pair of display parts.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an ophthalmic microscope.

  In the field of ophthalmology, various microscopes are used for magnifying and observing the eye. Examples of such an ophthalmic microscope include a slit lamp microscope and a surgical microscope. Some ophthalmic microscopes include an image sensor for photographing an eye, and others include a binocular optical system that provides binocular parallax for stereoscopic observation.

  Some surgical microscopes (operator microscopes) used by an operator who performs an operation on an eye are provided with an assistant's microscope. The assistant's microscope is used by an assistant who assists the operator. Similarly to the surgical microscope, the assistant can also observe the surgical part in three dimensions by guiding the left and right light from the surgical part (observation site) to the eyepiece part of the assistant's microscope.

Japanese Patent No. 4721981

  However, in a conventional surgical microscope in which an operator microscope is provided in the surgeon's microscope, a dedicated optical system is provided in the assistant's microscope separately from the surgeon's microscope, so that the structure is complicated. There's a problem. Further, since the light beams guided to the eyepieces of the surgeon's microscope and the assistant's microscope are different from each other, there is a problem that the appearance by the operator and the appearance by the assistant are different.

  On the other hand, the coaxial binocular microscope can present an image obtained by pupil division to both eyes of the assistant by separating one of the left and right light receiving paths. Therefore, the structure of the microscope is simplified, and the assistant can observe the image coaxially with the operator, so that the appearance by the operator and the appearance by the assistant can be made substantially the same. However, since pupil division is performed, there is a problem in that the amount of light guided to the eyepieces of both the operator and the assistant is reduced.

  As described above, surgical microscopes and other ophthalmic microscopes that have an assistant microscope in the surgeon's microscope have a simple configuration and allow the operator and assistant to observe coaxially without any optical loss. It is desirable that the image of the part can be observed.

  The present invention has been made in order to solve such problems, and its purpose is to have a simple configuration and allow an operator and an assistant to observe an image of an observation site coaxially without optical loss. It is to provide a possible ophthalmic microscope.

  The ophthalmic microscope according to the embodiment includes an illumination system, a light receiving system, a main eyepiece system, a secondary eyepiece system, and a control unit. The illumination system irradiates the eye to be examined with illumination light. The light receiving system includes a left imaging element and a right imaging element, and guides return light of illumination light irradiated to the eye to be examined to each of the left imaging element and the right imaging element. The main eyepiece system includes a left display unit, a left eyepiece lens system disposed on the display surface side of the left display unit, a right display unit, and a right eyepiece lens system disposed on the display surface side of the right display unit. . The sub-ocular system includes a pair of display units and a pair of eyepiece lens systems arranged on the display surface sides of the pair of display units. The control unit displays an image based on the output from the left image sensor on the left display unit, and displays an image based on the output from the right image sensor on the right display unit. The control unit rotates an image based on an output from at least one of the left imaging element and the right imaging element in accordance with the position of the sub-ocular system with respect to the main eye system and displays the image on the pair of display units.

  According to the embodiment, it is possible to provide an ophthalmic microscope that allows an operator and an assistant to observe an image of an observation site coaxially with a simple configuration without causing optical loss.

It is the schematic which shows an example of a structure of the ophthalmic microscope which concerns on embodiment. It is the schematic which shows an example of a structure of the ophthalmic microscope which concerns on embodiment. It is the schematic for demonstrating operation | movement of the ophthalmic microscope which concerns on embodiment. It is the schematic which shows an example of an effect | action of the ophthalmic microscope which concerns on embodiment. It is the schematic which shows an example of an effect | action of the ophthalmic microscope which concerns on embodiment. It is the schematic which shows an example of a structure of the ophthalmic microscope which concerns on embodiment. It is the schematic which shows the effect | action of the ophthalmic microscope which concerns on embodiment. It is the schematic which shows an example of a structure of the ophthalmic microscope which concerns on the modification 2 of embodiment. It is the schematic which shows an example of a structure of the ophthalmic microscope which concerns on the modification 3 of embodiment. It is the schematic which shows an example of a structure of the ophthalmic microscope which concerns on the modification 4 of embodiment. It is the schematic which shows an example of a structure of the ophthalmic microscope which concerns on the modification 4 of embodiment. It is the schematic which shows an example of a structure of the ophthalmic microscope which concerns on the modification 4 of embodiment.

  An example of an embodiment of an ophthalmic microscope according to the present invention will be described in detail with reference to the drawings. In addition, it is possible to use the description content of the literature referred in this specification, and arbitrary well-known techniques for the following embodiment.

  An ophthalmic microscope is used for observing (taking) an enlarged image of an eye to be examined in medical treatment or surgery in the ophthalmic field. The observation target part may be an arbitrary part of the patient's eye. For example, the anterior segment may be a cornea, a corner, a vitreous body, a crystalline lens, a ciliary body, or the like, and the retinal segment may be a retina or choroid. Or a vitreous body. Further, the observation target part may be a peripheral part of the eye such as a eyelid or an eye socket.

  Hereinafter, a surgical microscope will be described as an example of the ophthalmic microscope according to the embodiment, but an ophthalmic microscope other than the surgical microscope may be used.

[Constitution]
1 to 2 show a configuration example of an ophthalmic microscope according to the embodiment. 1 to 2 show a configuration example of an optical system of an ophthalmic microscope. FIG. 1 shows an optical system for observing the posterior eye part, and FIG. 2 shows an optical system for observing the anterior eye part.

  The ophthalmic microscope 1 includes an illumination system 10 (10L, 10R), a light receiving system 20 (20L, 20R), a main eyepiece system 30 (30L, 30R), and a sub-eyepiece system 80 (80L, 80R). When observing the posterior eye portion (retinal or the like), the front lens 90 is disposed immediately before the eye E to be examined. A contact lens or the like can be used instead of the non-contact front lens 90 as shown in FIG. In addition, when observing the corner angle, a contact mirror (three-sided mirror or the like) can be used.

(Lighting system 10)
The illumination system 10 irradiates the eye E with illumination light. Although not shown, the illumination system 10 includes a light source that emits illumination light, a diaphragm that defines an illumination field, a lens system, and the like. The configuration of the illumination system may be the same as that of a conventional ophthalmologic apparatus (for example, a slit lamp microscope, a fundus camera, a refractometer, etc.).

The illumination system 10 (10L and 10R) of the present embodiment is configured coaxially with the light receiving system 20 (20L and 20R), respectively. Specifically, a beam splitter 11L made of, for example, a half mirror is obliquely installed in the light receiving system (left light receiving system) 20L for acquiring an image presented to the left eye E ₀ L of the operator (observer). ing. The beam splitter 11L coaxially couples the optical path of the illumination system (left illumination system) 10L to the optical path of the light receiving system 20L. The illumination light output from the illumination system 10L is reflected by the beam splitter 11L and illuminates the eye E coaxially with the light receiving system 20L. Similarly, the light path of the illumination system (right illumination system) 10R is coupled to the light path of the light reception system 20R to the light reception system (right light reception system) 20R for acquiring an image presented to the right eye E ₀ R of the surgeon. A beam splitter 11R is obliquely installed. The beam splitter 11R coaxially couples the optical path of the illumination system 10R to the optical path of the light receiving system 20R. The illumination light output from the illumination system 10R is reflected by the beam splitter 11R and illuminates the eye E coaxially with the light receiving system 20R.

  The position of the illumination light with respect to the optical axis of the light receiving system 20L (20R) can be changed. This configuration is realized, for example, by providing means for changing the irradiation position of the illumination light with respect to the beam splitter 11L (11R) as in the conventional microscope for ophthalmic surgery.

  In this example, the beam splitter 11L (11R) is arranged between the objective lens 21L (21R) and the eye E, but the position where the optical path of the illumination light is coupled to the light receiving system 20L (20R) is received. It can be at any position in the system 20L (20R).

(Light receiving system 20)
In the present embodiment, a pair of left and right light receiving systems 20 (20L and 20R) are provided. The light receiving system 20L has a configuration for acquiring an image presented to the left eye E ₀ L of the operator, and the light receiving system 20R has a configuration for acquiring an image presented to the right eye E ₀ R. Have. The light receiving system 20L and the light receiving system 20R have the same configuration. The light receiving system 20L (20R) includes an objective lens 21L (21R), an imaging lens 22L (22R), and an image sensor 23L (23R).

  A configuration in which the imaging lens 22L (22R) is not provided can also be applied. When the imaging lens 22L (22R) is provided as in the present embodiment, an afocal optical path (parallel optical path) is formed between the objective lens 21L (21R) and the imaging lens 22L (22R). it can. As a result, it becomes easy to arrange optical elements such as filters, and to arrange optical path coupling members to couple optical paths from other optical systems (that is, the degree of freedom and expandability of the optical configuration is improved). )

  Symbol AL1 indicates the optical axis (objective optical axis) of the objective lens 21L of the light receiving system 20L, and symbol AR1 indicates the optical axis (objective optical axis) of the objective lens 21R of the light receiving system 20R. The image sensor 23L (23R) is an area sensor such as a CCD image sensor or a CMOS image sensor.

  The above is the configuration of the light receiving system 20 when observing the posterior segment (fundus) of the eye E (FIG. 1). On the other hand, when observing the anterior segment, as shown in FIG. 2, the focus lens 24L (24R) and the wedge prism 25L (25R) are arranged at the position on the eye E side with respect to the objective lens 21L (21R). Is done. The focus lens 24L (24R) of this example is a concave lens, and acts to extend the focal length of the objective lens 21L (21R). The wedge prism 25L (25R) deflects the optical path (objective optical axis AL1 (AR1)) of the light receiving system 20L (20R) outward by a predetermined angle (indicated by reference numerals AL2 and AR2). Thus, the focus lens 24L and the wedge prism 25L are arranged in the light receiving system 20L, and the focus lens 24R and the wedge prism 25R are arranged in the light receiving system 20R. Accordingly, the focus position F1 for observing the posterior eye part is switched to the focus position F2 for observing the anterior eye part.

  A convex lens can be used as the focus lens. In this case, the focus lens is disposed in the optical path when observing the posterior eye part, and is retracted from the optical path when observing the anterior eye part. Instead of switching the focal length by inserting / retracting the focus lens, for example, by providing a focus lens that can move in the optical axis direction, the focal length can be changed continuously or stepwise.

  In the example shown in FIG. 2, the wedge prism 25L (25R) has a base direction outside (that is, a base-out arrangement), but a wedge prism having a base-in arrangement can be used. In this case, the wedge prism is disposed in the optical path when observing the posterior eye part, and is retracted from the optical path when observing the anterior eye part. Instead of switching the direction of the optical path by inserting / retracting the wedge prism, it is possible to change the direction of the optical path continuously or stepwise by providing a prism with a variable prism amount (and prism direction). is there.

(Main eyepiece system 30)
In the present embodiment, a pair of left and right main eyepiece systems 30 (30L and 30R) are provided. The main eyepiece system (left main eyepiece system) 30L has a configuration to present an image of the eye E obtained by the light receiving system 20L to the left eye E _{0 L} of the operator. The main eyepiece system (right main eyepiece system) 30R has a configuration to present an image of the eye E obtained by the light receiving system 20R on the right eye E _{0 R.} The main eyepiece system 30L and the main eyepiece system 30R have the same configuration. The main eyepiece system 30L (30R) includes a display unit 31L (31R) and an eyepiece system 32L (32R) arranged on the display surface side of the display unit 31L (31R).

  Display unit 31L (31R) is a flat panel display such as an LCD, for example. The size of the display surface of the display unit 31L (31R) is, for example, (diagonal length) 7 inches or less. The screen sizes of the display devices provided in the pair of left and right main eyepiece systems 30L and 30R are the eye width (distance between pupils, etc.) of the operator (observer), the size of the device, and the design of the device (the optical system and mechanism). Placement etc. are restricted. That is, there is a trade-off between such constraints and the apparent field of view. From such a viewpoint, the maximum screen size of the display units 31L and 31R is considered to be about 7 inches. In addition, by devising the configuration of the eyepiece lens systems 32L and 32R and the arrangement of the mechanisms, the display units 31L and 31R having a screen size exceeding 7 inches can be applied, or the small-sized display units 31L and 31R can be applied. Can be applied.

It is possible to change the interval between the main eyepiece system 30L and the main eyepiece system 30R. Thereby, the interval between the main eyepiece system 30L and the main eyepiece system 30R can be adjusted according to the eye width of the surgeon. In addition, the relative orientation of the main eyepiece system 30L and the main eyepiece system 30R can be changed. That is, the angle formed by the optical axis of the main eyepiece system 30L and the optical axis of the main eyepiece system 30R can be changed. Thereby, the convergence of both eyes E ₀ L and E ₀ R can be induced, and stereoscopic vision by the operator can be supported.

(Secondary eyepiece system 80)
In the present embodiment, a pair of left and right auxiliary eyepiece systems 80 (80L and 80R) are provided. The auxiliary eyepiece system (left auxiliary eyepiece system) 80L presents an image based on the output of either the imaging element (left imaging element) 23L or the imaging element (right imaging element) 23R to the left eye E ₁ L of the assistant. It has a configuration. The auxiliary eyepiece system (right auxiliary eyepiece system) 80R has a configuration for presenting an image based on the output of either the imaging element 23L or the imaging element 23R to the right eye E ₁ R of the assistant. The auxiliary eyepiece system 80L and the auxiliary eyepiece system 80R have the same configuration. The auxiliary eyepiece system 80L (80R) includes a display unit 81L (81R) and an eyepiece system 82L (82R) disposed on the display surface side of the display unit 81L (81R).

  Display unit 81L (81R) is a flat panel display such as an LCD, for example. The size of the display surface of the display unit 81L (81R) may be the same as that of the display unit 31L (31R), for example.

  It is possible to change the interval between the auxiliary eyepiece system 80L and the auxiliary eyepiece system 80R. Thereby, the distance between the auxiliary eyepiece system 80L and the auxiliary eyepiece system 80R can be adjusted according to the assistant's eye width.

  The position of the secondary eyepiece system 80 relative to the main eyepiece system 30 can be changed. For example, the auxiliary eyepiece system 80 is held so as to be rotatable around a rotation axis that is substantially perpendicular to the surgical site. The relative position between the rotation axis and the main eyepiece system 30 may be constant. The rotation axis may be an objective optical axis of the light receiving system 20 or an intermediate axis between the objective optical axes AL1 and AR1. In this embodiment, the position of the sub-eyepiece system 80 with respect to the main eyepiece system 30 is defined as the position on the rotation trajectory around this rotation axis. That is, the position where the secondary eyepiece system 80 faces the main eyepiece system 30 is a position of 180 degrees (see FIG. 4 described later), and the left side (on the turning trajectory) orthogonal to the front direction of the main eyepiece system 30. The position of the secondary eyepiece system 80 is assumed to be a 90 degree position (see FIGS. 1 and 2). Similarly, the position of the secondary eyepiece system 80 on the right side (on the turning trajectory) orthogonal to the front direction of the main eyepiece system 30 is a position of 270 degrees (see FIG. 5).

  The left image L acquired by the image sensor 23L is displayed on the display unit 31L of the main eyepiece system 30L. The right image R acquired by the image sensor 23R is displayed on the display unit 31R of the main eyepiece system 30R. Thereby, the surgeon can observe the operation part in three dimensions. In FIGS. 1 and 2, the orientations of the images displayed on the display units 31L and 31R are schematically represented by the orientations “L” and “R”.

  On the other hand, in the display units 81L and 81R of the secondary eyepiece system 80, an image based on the output from at least one of the imaging elements 23L and 23R of the main eyepiece system 30 is positioned at the position of the secondary eyepiece system 80 with respect to the main eyepiece system 30. It is rotated and displayed accordingly.

  FIG. 3 schematically illustrates images displayed on the display units 81 </ b> L and 81 </ b> R of the secondary eyepiece system 80 according to the position of the secondary eyepiece system 80 with respect to the main eyepiece system 30. FIG. 3 schematically shows an image displayed on the display units 31L and 31R of the main eyepiece system 30 and an image displayed on the display units 81L and 81R of the secondary eyepiece system 80 when the eye E is viewed from directly above. Represent. As shown in FIG. 3, the left image L is displayed on the display unit 31L of the main eyepiece system 30, and the right image R is displayed on the display unit 31R. In FIG. 3, as in FIGS. 1 and 2, the orientations of the images displayed on the display units 81 </ b> L and 81 </ b> R are schematically represented by “L” and “R” orientations. In FIG. 3, the arrangement directions of the display portions 81 </ b> L and 81 </ b> R are fixed regardless of the position of the secondary eyepiece system 80 with respect to the main eyepiece system 30.

  FIG. 4 shows a configuration example of the optical system of the ophthalmic microscope 1 when the secondary eyepiece system 80 is located at a position of 180 degrees with respect to the main eyepiece system 30. 4, parts that are the same as those in FIG. 1 and FIG.

  When the secondary eyepiece system 80 is positioned within a predetermined stereoscopic viewing range (predetermined range) including a position (180 degrees) facing the main eyepiece system 30, the right image displayed on the display unit 31 </ b> R is displayed on the display unit 81 </ b> L. R is rotated 180 degrees and displayed. In addition, the left image L displayed on the display unit 31L is displayed on the display unit 81R after being rotated by 180 degrees. The stereoscopic viewing range can be, for example, a range in which the position of the secondary eyepiece system 80 with respect to the main eyepiece system 30 is 175 to 180 degrees. Thereby, when the auxiliary eyepiece system 80 is located in the stereoscopic vision range, the assistant can observe the operation part in a three-dimensional manner like the operator.

  FIG. 5 shows a configuration example of the optical system of the ophthalmic microscope 1 when the secondary eyepiece system 80 is located at a position of 270 degrees with respect to the main eyepiece system 30. 5, parts similar to those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  The position shown in FIG. 5 is a position outside the above-described stereoscopic viewing range, similarly to the positions shown in FIGS. 1 and 2. When the sub-ocular system 80 is located at a position outside the stereoscopic viewing range, an image displayed on one of the display units 31L and 31R is displayed on both the display units 81L and 81R. 30 is rotated and displayed according to the position of the auxiliary eyepiece system 80 with respect to 30. The images displayed on both of the display units 81L and 81R are images displayed on the display units 31L and 31R that are closer to each other along the rotation trajectory of the sub-ocular system 80. For example, the image is rotated in the direction in which the auxiliary eyepiece system 80 is rotated.

  For example, as shown in FIGS. 1 and 2, at the position of 90 degrees with respect to the main eyepiece system 30, the display part 31 </ b> L is closer to the display part 31 </ b> L than the display part 31 </ b> R. The left image L displayed on the display unit 31L is rotated 90 ° and displayed.

  Further, for example, as shown in FIG. 5, at the position of 270 degrees with respect to the main eyepiece system 30, the subeyepiece system 80 is closer to the display section 31 </ b> R than the display section 31 </ b> L. Is displayed by rotating the right image R displayed on the display unit 31R by 270 °.

  Here, the position of the sub-eyepiece system 80 with respect to the main eyepiece system 30 is P (P is a real number) degrees. In the range of 0 degree <P (P is a real number) <175 degrees, the sub-ocular system 80 is closer to the display unit 31L than the display unit 31R, and thus is displayed on the display unit 31L on both the display units 81L and 81R. The left image L is rotated by P degrees and displayed. In the range of 185 degrees <P <360 degrees, the secondary eyepiece system 80 is closer to the display unit 31R than the display unit 31L. Therefore, the right image R displayed on the display unit 31R is displayed on both the display units 81L and 81R. Displayed after being rotated P degrees. Thereby, the assistant can observe the surgical site with both eyes in the same manner as the surgeon.

  In the range of 175 degrees ≦ P ≦ 185 degrees, as described above, the display unit 81L displays the right image R displayed on the display unit 31R after being rotated by 180 degrees, and the display unit 81R displays the display. The left image L displayed on the part 31L is rotated 180 degrees and displayed.

  FIG. 6 shows a configuration example of a control system of the ophthalmic microscope 1 according to the embodiment. In FIG. 6, the same parts as those in FIGS.

  The control unit 100 executes control of each unit of the ophthalmic microscope 1. Examples of control of the illumination system 10 include the following: turning on / off the light source, adjusting the amount of light; adjusting the diaphragm; adjusting the slit width when slit illumination is possible. Control of the image sensor 23 includes exposure adjustment, gain adjustment, and shooting rate adjustment.

  The control unit 100 displays various information on the display units 31 and 81. The control unit 100 includes a main eyepiece system control unit 101 and a sub eyepiece system control unit 102. The main eyepiece system control unit 101 displays an image (or an image obtained by processing the image) acquired by the image sensor 23L on the display unit 31L, and also acquires an image (or the image acquired by the image sensor 23R). The image obtained by processing is displayed on the display unit 31R. The sub-ocular system control unit 102 rotates an image based on the output from at least one of the image sensors 23L and 23R according to the position of the sub-ocular system 80 with respect to the main eye system 30, and displays the image on the display units 81L and 81R.

  For example, the sub-ocular system control unit 102 outputs image data output to at least one of the display units 31L and 31R to the data processing unit 200. Further, the secondary eyepiece system control unit 102 outputs position information indicating the position of the secondary eyepiece system 80 relative to the main eyepiece system 30 to the data processing unit 200. The data processing unit 200 performs a known rotation process based on the position information on the image data received from the sub-ocular system control unit 102. The image data after the rotation processing is sent to the sub-ocular system control unit 102. The sub-ocular system control unit 102 sends the image data after the rotation process received from the data processing unit 200 to the display units 81L and 81R. Thereby, the sub-ocular system control unit 102 can rotate the display according to the position of the sub-ocular system 80 relative to the main eye system 30 and display the images on the display units 81L and 81R.

  Further, the sub-ocular system control unit 102 may execute display control on the display units 81L and 81R according to the position of the sub-ocular system 80 with respect to the main eye system 30. For example, image data output to at least one of the display units 31L and 31R is stored in the frame memory. The sub-ocular system control unit 102 changes the reading order of the image data stored in the frame memory according to the position of the sub-ocular system 80 with respect to the main eye system 30. The sub-ocular system control unit 102 sequentially outputs image data read from the frame memory to the display units 81L and 81R in the reading order changed according to the position of the sub-ocular system 80 with respect to the main eye system 30. By performing raster scanning based on the image data sent from the sub-ocular system control unit 102, images rotated according to the position of the sub-ocular system 80 relative to the main eye system 30 are displayed on the display units 81L and 81R. The

  Furthermore, the control unit 100 controls various mechanisms. As such a mechanism, a stereo angle changing unit 20A, a focusing unit 24A, an optical path deflecting unit 25A, an interval changing unit 30A, and an orientation changing unit 30B are provided.

  Stereo angle changing unit 20A (first mechanism) relatively rotates and moves light receiving system 20L and light receiving system 20R. That is, the stereo angle changing unit 20A relatively moves the light receiving system 20L and the light receiving system 20R so as to change the angle formed by the respective objective optical axes (for example, AL1 and AR1). This relative movement is, for example, to move the light receiving system 20L and the light receiving system 20R by the same angle in opposite rotational directions. In this movement mode, the direction of the angle bisector formed by the objective optical axes (for example, AL1 and AR1) is constant. On the other hand, it is also possible to perform the relative movement so that the direction of the bisector changes.

  An example of a state in which the stereo angle is enlarged from the state shown in FIG. 2 is shown in FIG. The stereo angle may be defined as an angle formed by the objective optical axis AL1 of the light receiving system 20L and the objective optical axis AR1 of the light receiving system 20R, or the objective light axis AL2 of the light receiving system 20L and the objective light of the light receiving system 20R. It may be defined as an angle formed by the axis AR2. Even if the stereo angle is changed by the stereo angle changing unit 20A, the relative positions (intervals and relative orientations) of the left and right main eyepiece systems 30L and 30R do not change. Further, the focal position is adjusted by adjusting the distance between the left and right light receiving systems 20L and 20R with respect to the eye E or changing the focal length of the left and right light receiving systems 20L and 20R in response to the change in the stereo angle. Control can be performed so as not to move.

  The focusing unit 24A inserts / withdraws the left and right focus lenses 24L and 24R with respect to the optical path. The focusing unit 24A may be configured to simultaneously insert / retract the left and right focus lenses 24L and 24R. In another example, the focusing unit 24A may be configured to change the focal position by moving the left and right focus lenses 24L and 24R (simultaneously) in the optical axis direction. Alternatively, the focusing unit 24A may be configured to change the focal length by changing (simultaneously) the refractive powers of the left and right focus lenses 24L and 24R.

  The optical path deflecting unit 25A inserts / withdraws the left and right wedge prisms 25L and 25R with respect to the optical path. The optical path deflecting unit 25A may be configured to simultaneously insert / retract the left and right wedge prisms 25L and 25R. In another example, the optical path deflecting unit 25A changes the direction of the optical paths of the left and right light receiving systems 20L and 20R by changing the prism amounts (and prism directions) of the left and right wedge prisms 25L and 25R (simultaneously). May be configured.

  The interval changing unit 30A changes the interval between the left and right main eyepiece systems 30L and 30R. The interval changing unit 30A may be configured to relatively move the left and right main eyepiece systems 30L and 30R without changing the relative directions of the optical axes of each other.

  The direction changing unit 30B changes the relative directions of the left and right main eyepiece systems 30L and 30R. The direction changing unit 30B relatively moves the main eyepiece system 30L and the main eyepiece system 30R so as to change the angle formed by the optical axes of each other. This relative movement is, for example, to move the main eyepiece system 30L and the main eyepiece system 30R by the same angle in opposite rotation directions. In this movement mode, the direction of the bisector of the angle formed by the optical axes of each other is constant. On the other hand, it is also possible to perform the relative movement so that the direction of the bisector changes.

  The position detection unit 110 detects the position of the sub-eyepiece system 80 with respect to the main eyepiece system 30. The position detection unit 110 is, for example, one or more arranged corresponding to a rotation position around the rotation axis of the secondary eyepiece system 80 (for example, a 90 degree position, a 180 degree position, a 270 degree position, etc.). This is composed of a micro switch or the like. Each micro switch is pressed when the sub-ocular system 80 is rotated to the rotation position corresponding to the micro switch. The detection signal obtained by the position detection unit 110 is sent to the control unit 100. The sub-ocular system control unit 102 rotates the image based on the output from at least one of the imaging elements 23L and 23R based on the detection result by the position detection unit 110 and displays the image on both the display units 81L and 81R as described above. .

  Further, the position detection unit 110 may be configured by an RFID (Radio Frequency Identifier), a magnetic sensor, or the like.

  Note that when the position of the sub-eyepiece system 80 with respect to the main eyepiece system 30 is fixed, the ophthalmic microscope 1 may have a configuration that does not require the position detection unit 110.

(Data processing unit 200)
The data processing unit 200 executes various types of data processing. This data processing includes processing for forming an image, processing for processing an image, and the like. In addition, the data processing unit 200 may be capable of executing processing relating to analysis of images, examination results, and measurement results, and information relating to the subject (such as electronic medical record information). The data processing unit 200 includes a scaling processing unit 210.

The scaling processing unit 210 enlarges the image acquired by the image sensor 23. This process is a so-called digital zoom process, and includes a process of cutting out a part of an image acquired by the image sensor 23 and a process of creating an enlarged image of the part. The image clipping range is set by the operator (observer) or by the control unit 100. The scaling processing unit 210 performs the same processing on the image (left image) acquired by the imaging device 23L of the light receiving system 20L and the image (right image) acquired by the imaging device 23R of the light receiving system 20R. . Thereby, images of the same magnification are presented to the left eye E ₀ L and right eye E ₀ R of the surgeon.

  In addition to or instead of such a digital zoom function, a so-called optical zoom function can be provided. The optical zoom function is realized by providing a variable magnification lens (variable lens system) in each of the left and right light receiving systems 20L and 20R. As a specific example, there is a configuration in which the variable magnification lens is (selectively) inserted / retracted with respect to the optical path, or a configuration in which the variable magnification lens is moved in the optical axis direction. Control related to the optical zoom function is executed by the control unit 100.

(User interface 300)
The user interface (UI) 300 has a function for exchanging information between the operator and the ophthalmic microscope 1. The user interface 300 includes a display device and an operation device (input device). The display device may include the display unit 31 and may include other display devices. The operation device includes various hardware keys and / or software keys. It is possible to integrally configure at least a part of the operation device and at least a part of the display device. A touch panel display is an example.

(Communication unit 400)
The communication unit 400 performs a process for transmitting information to another apparatus and a process for receiving information transmitted from the other apparatus. The communication unit 400 may include a communication device that conforms to a predetermined network (LAN, Internet, etc.). For example, the communication unit 400 acquires information from an electronic medical record database or a medical image database via a LAN provided in a medical institution. When an external monitor is provided, the communication unit 400 can transmit an image acquired by the ophthalmic microscope 1 (such as an image acquired by the light receiving system 20) to the external monitor substantially in real time. it can.

  The secondary eyepiece system 80 may be able to receive control signals and image data from the control unit 100 by wireless communication.

  The image sensor 23L is an example of a “left image sensor” according to the embodiment. The image sensor 23R is an example of a “right image sensor” according to the embodiment. The display unit 31L is an example of a “left display unit” according to the embodiment. The eyepiece system 32L is an example of a “left eyepiece system” according to the embodiment. The display unit 31R is an example of a “right display unit” according to the embodiment. The eyepiece lens system 32R is an example of a “right eyepiece lens system” according to the embodiment. The display units 81L and 81R are an example of “a pair of display units” according to the embodiment. The eyepiece systems 82L and 82R are examples of “a pair of eyepiece systems”.

[effect]
The effect of the ophthalmic microscope of the embodiment will be described.

  The ophthalmic microscope (ophthalmic microscope 1) of the embodiment includes an illumination system (illumination system 10), a light receiving system (light receiving system 20), a main eyepiece system (main eyepiece system 30), and a subeyepiece system (subeyepiece system). 80) and a control unit (control unit 100, main eyepiece system control unit 101, sub eyepiece system control unit 102). The illumination system irradiates the eye to be examined (eye E to be examined) with illumination light. The light receiving system includes a left imaging element (imaging element 23L) and a right imaging element (imaging element 23R), and guides return light of illumination light irradiated to the eye to be examined to the left imaging element and the right imaging element, respectively. The main eyepiece system includes a left display unit (display unit 31L), a left eyepiece lens system (eyepiece lens system 32L) disposed on the display surface side of the left display unit, a right display unit (display unit 31R), and a right display. Right eyepiece lens system (eyepiece lens system 32R) disposed on the display surface side of the unit. The auxiliary eyepiece system includes a pair of display units (display units 81L and 81R) and a pair of eyepiece lens systems (eyepiece lens systems 82L and 82R) disposed on the respective display surfaces of the pair of display units. The control unit displays an image based on the output from the left image sensor on the left display unit, and displays an image based on the output from the right image sensor on the right display unit. The control unit rotates an image based on an output from at least one of the left imaging element and the right imaging element in accordance with the position of the sub-ocular system with respect to the main eye system and displays the image on the pair of display units.

  According to such a configuration, the image based on the output from each of the left imaging element and the right imaging element of the main eyepiece system, the left display unit and the right display unit of the main eyepiece system, and the pair of display units of the subocular system Can be displayed. Thereby, an observer using the main eyepiece system (for example, an operator) and an observer using the auxiliary eyepiece system (for example, an assistant) can coaxially form an image of the observation site with a simple configuration and without optical loss. It becomes possible to observe. In addition, since an image rotated according to the position of the sub-ocular system with respect to the main eye system is displayed on the pair of display units of the sub-ocular system, an observer using the sub-ocular system can observe using the main eye system. As with a person, the image of the observation site can be observed with binocular eyes.

  In addition, the ophthalmic microscope of the embodiment may include a position detection unit (position detection unit 110). The position detection unit detects the position of the sub-eyepiece system with respect to the main eyepiece system. The control unit rotates an image based on an output from at least one of the left imaging element and the right imaging element based on a detection result by the position detection unit.

  According to such a configuration, an image based on an output from at least one of the left imaging element and the right imaging element is rotated on the pair of display units of the secondary eyepiece system according to the position of the secondary eyepiece system with respect to the primary eyepiece system. Displayed. Thereby, regardless of the position of the secondary eyepiece system with respect to the main eyepiece system, the observer using the secondary eyepiece system can observe the image of the observation site with binocular eyes similarly to the observer using the primary eyepiece system.

  In the ophthalmic microscope according to the embodiment, the control unit is arranged on the right eye side of the pair of display units when the sub-ocular system is positioned within a predetermined range (stereoscopic range) including a position facing the main eyepiece system. The image displayed on the left display unit may be rotated 180 degrees and displayed, and the image displayed on the right display unit may be rotated 180 degrees and displayed on the left eye side of the pair of display units.

  According to such a configuration, when the secondary eyepiece system is located within the predetermined range, the observer using the secondary eyepiece system can observe the observation region in a three-dimensional manner, similar to the observer using the primary eyepiece system. it can.

  In the ophthalmic microscope of the embodiment, when the sub-ocular system is located outside the predetermined range, the control unit displays an image displayed on the display unit close to the sub-ocular system among the left display unit and the right display unit. You may display on both of a pair of display parts.

  According to such a configuration, when the sub-ocular system is positioned outside the predetermined range, the observer using the sub-ocular system observes the image of the observation site with binocular similarly to the observer using the main eye system. be able to.

[Modification]
The above embodiments are merely examples for carrying out the present invention. A person who intends to implement the present invention can make arbitrary modifications, omissions, additions, substitutions and the like within the scope of the present invention. Hereinafter, the drawings in the above embodiments will be referred to as appropriate.

(Modification 1)
In the above embodiment, the focus lenses 24L and 24R and the wedge prisms 25L and 25R are retracted from the optical path during fundus observation, and are inserted into the optical path during anterior segment observation. Such an operation can be automated. In the embodiment, an auxiliary optical member for changing the observation site of the eye to be examined is used. For example, the front lens 90 is disposed in the optical path during fundus observation and is retracted from the optical path during anterior eye observation.

  The ophthalmic microscope of the present modification changes the states of the focus lenses 24L and 24R according to the state of the auxiliary optical member (that is, selection of the observation site). That is, the control unit 100 controls the second mechanism for linking the focus lenses 24L and 24R according to the change of the observation site by the auxiliary optical member. Similarly, the control unit 100 controls the third mechanism for operating the wedge prisms 25L and 25R in association with changes in the observation site by the auxiliary optical member.

  A specific example will be described. When the front lens 90 is retracted from the optical path, the control unit 100 controls the focusing unit 24A and the optical path deflecting unit 25A so that the focus lenses 24L and 24R and the wedge prisms 25L and 25R are inserted into the optical path. . Conversely, the control unit 100 controls the focusing unit 24A and the optical path deflecting unit 25A so as to retract from the focus lenses 24L and 24R and the wedge prisms 25L and 25R in response to the insertion of the front lens 90 in the optical path. To do.

  The ophthalmic microscope according to the present modification may include a configuration for generating information indicating the state of the auxiliary optical member (for example, whether or not the front lens 90 is inserted in the optical path). For example, the arrangement state of the arm that holds the front lens 90 can be detected using a sensor such as a microswitch. Alternatively, in the configuration in which the insertion / retraction of the front lens 90 is performed based on a signal from the control unit 100, the current state of the front lens 90 can be recognized by referring to the control history.

  As another example, based on the image acquired by the image sensor 23L and / or 23R and the current state of the focus lenses 24L and 24R and the wedge prisms 25L and 25R, is the front lens 90 disposed in the optical path? It can be determined whether or not. For example, the data processing unit 200 analyzes an image acquired in a state where the focus lens 24L and the like are arranged on the optical path, thereby obtaining an amount indicating the blurred state of the image. When the amount of blur is equal to or greater than the threshold value, it is determined that the front lens 90 is disposed in the optical path. Conversely, if the amount of blur is less than the threshold value, it is determined that the front lens 90 is retracted from the optical path. In the case of analyzing an image acquired in a state where the focus lens 24L is retracted from the optical path, the state of the front lens 90 can be determined in the same manner.

  According to this modification, the state of the lens for changing the focal position (focus lenses 24L and 24R) and the state of the deflection member (wedge prisms 25L and 25R) for deflecting the optical path are used for switching the observation site. It can be changed automatically. Therefore, the operability can be further improved.

(Modification 2)
The illumination systems (10L and 10R) of the above embodiment are arranged coaxially with the pair of light receiving systems (20L and 20R). In this modification, a configuration in which an illumination system is arranged non-coaxially with respect to a pair of light receiving systems, that is, a configuration in which illumination light can be irradiated from a direction different from the objective optical axis of the pair of light receiving systems will be described. A configuration example of the optical system of this modification is shown in FIG. The illumination system 10S of the ophthalmic microscope 1A can irradiate, for example, slit light to the eye to be examined. A typical example of such an ophthalmic microscope is a slit lamp microscope. In the present modification, the relative positions of the illumination system 10S and the light receiving systems 20L and 20R can be changed like a slit lamp microscope. That is, the illumination system 10S and the light receiving systems 20L and 20R are configured to be rotatable around the same axis. Thereby, it is possible to observe the cross section of the cornea etc. illuminated with the slit light from an oblique direction.

  The ophthalmic microscope may include one or both of a coaxial illumination system as in the above embodiment and a non-coaxial illumination system as in this modification. When both illumination systems are provided, the illumination system to be used can be switched in accordance with, for example, switching of the observation site.

(Modification 3)
In the above-described embodiment, the single secondary eyepiece system 80 is provided for the single main eyepiece system 30. In this modification, a configuration in which two or more secondary eyepiece systems 80 are provided for a single main eyepiece system 30 will be described. A configuration example of the optical system of this modification is shown in FIG. The configurations of the two or more auxiliary eyepiece systems 80 are the same. FIG. 9 shows a configuration example in the case where two secondary eyepiece systems 80 (80 ₁ and 80 ₂ ) are provided for a single main eyepiece system 30. The left image L and the right image R are displayed on the display units 31L and 31R of the main eyepiece system 30 of the ophthalmic microscope 1B, respectively. Thereby, the surgeon can observe the operation part in three dimensions. Sub eyepiece system control unit according to this modification, each of the display unit 81L and 81R (81 ₁ L and ₈₁ 1 R 2 or more sub eyepiece system 80 (80 ₁ and 80 _2), and 81 ₂ L and 81 ₂ R) displays an image rotated according to the position of the sub-eyepiece system with respect to the main eyepiece system 30. In FIG. 9, images rotated in the same manner as in FIGS. 1 and 2 are displayed on the display portions 81 ₁ L and 81 ₁ R, and rotated in the same manner as in FIG. 4 on the display portions 81 ₂ L and 81 ₂ R. An image is displayed.

[effect]
Ophthalmic microscope modification of the embodiment (ophthalmic microscope 1B) may include two or more sub-ocular system (sub eyepiece system 80 ₁ and 80 _2). The control unit (sub-ocular system control unit 102) causes the pair of display units of each of the two or more sub-ocular systems to display an image rotated according to the position of the sub-ocular system with respect to the main eye system.

  According to such a configuration, an observer using a main eyepiece system (for example, an operator) and a plurality of observers using each of two or more sub-ocular systems with a simple configuration without optical loss ( For example, a plurality of assistants) can observe an image coaxially. In addition, since the image rotated according to the position of the sub-ocular system with respect to the main eye system is displayed on the pair of display units of the sub-ocular system, a plurality of observers using each of the two or more sub-ocular systems Can observe the image of the observation site with binoculars, like an observer using the main eyepiece system.

(Modification 4)
The ophthalmic microscope 1 according to the above embodiment may have a function as another ophthalmologic apparatus in addition to a function as a microscope for magnifying and observing an eye to be examined. Examples of functions as other ophthalmologic apparatuses include OCT (Optical Coherence Tomography), laser treatment, axial length measurement, refractive power measurement, and higher-order aberration measurement. Other ophthalmologic apparatuses have an arbitrary configuration capable of performing examination, measurement, and imaging of an eye to be examined by an optical method. An ophthalmic microscope 1C according to this modification has a configuration in which an OCT function is combined with a microscope. FIG. 10 shows a configuration example of the optical system of this modification. The ophthalmic microscope 1 </ b> C includes an illumination system 10, a light receiving system 20, a main eyepiece system 30, a secondary eyepiece system 80, an irradiation system 40, and an OCT system 60.

  The irradiation system 40 irradiates the eye E with light for realizing the function as the “other ophthalmologic apparatus” from a direction different from the objective optical axis (AL1 and AR1, and AL2 and AR2) of the light receiving system 20. To do. The irradiation system 40 of this example irradiates the eye E with light for OCT (measurement light).

  The irradiation system 40 includes an optical scanner 41, a focus lens 42, a deflection mirror 43, and an OCT objective lens 44. Light from the OCT system 60 is guided to the optical scanner 41. The focus lens 42 is movable along the optical path of light from the OCT system 60. For example, a movement mechanism (not shown) receives a control signal from the control unit 100a described later, and moves the focus lens 42 by a designated movement amount in a movement direction designated by the control signal.

  Light (measurement light) from the OCT system 60 is guided by the optical fiber 51 and emitted from the end face of the fiber. A collimating lens 52 is disposed at a position facing the fiber end face. The collimating lens 52 converts the measurement light emitted from the fiber end face into a parallel light beam. The measurement light converted into a parallel light beam by the collimator lens 52 is guided to the optical scanner 41. The collimating lens 52 may be movable along the optical path of the measuring light as a focus lens (or one of the lens groups constituting the focus lens). In this case, a moving mechanism (not shown) can move the collimating lens 52 along the optical path of the measurement light. The moving mechanism for moving the collimating lens 52 is also controlled by the control unit 100a. Both the focus lens 42 and the collimating lens 52 may be moved in conjunction or independently by a moving mechanism.

  The optical scanner 41 is a two-dimensional optical scanner, and includes an x scanner 41H that deflects light in the horizontal direction (x direction) and a y scanner 41V that deflects light in the vertical direction (y direction). Each of the x scanner 41H and the y scanner 41V may be an arbitrary type of optical scanner, and for example, a galvanometer mirror is used. The optical scanner 41 is disposed, for example, at the exit pupil position of the collimating lens 52 or a position in the vicinity thereof. Furthermore, the optical scanner 41 is disposed, for example, at the entrance pupil position of the focus lens 42 or a position in the vicinity thereof.

  When a two-dimensional optical scanner is configured by combining two one-dimensional optical scanners as in this example, the two one-dimensional optical scanners are arranged apart from each other by a predetermined distance (for example, about 10 mm). Thereby, for example, any one-dimensional optical scanner can be arranged at the exit pupil position and / or the entrance pupil position.

  The focus lens 42 temporarily forms an image of the parallel light beam (measurement light) that has passed through the optical scanner 41. The light that has passed through the focus lens 42 is reflected by the deflection mirror 43 toward the OCT objective lens 44. The light passing through the OCT objective lens 44 is irradiated to the eye E.

  The position of the deflection mirror 43 is determined in advance so that the light guided by the irradiation system 40 is irradiated to the eye E from a direction different from the objective optical axis (AL1 and AR1, and AL2 and AR2) of the light receiving system 20. ing. In this example, the deflection mirror 43 is disposed at a position between the light receiving system 20L and the light receiving system 20R in which the respective objective optical axes are disposed non-parallel.

  The OCT system 60 includes an interference optical system for performing OCT. An example of the configuration of the OCT system 60 is shown in FIG. The optical system shown in FIG. 11 is an example of a swept source OCT, which splits light from a wavelength scanning type (wavelength sweep type) light source into measurement light and reference light, and returns return light of measurement light from the eye E to be examined. Interference light is generated by interfering with the reference light passing through the reference light path, and this interference light is detected. The detection result (detection signal) of the interference light by the interference optical system is a signal indicating the spectrum of the interference light, and is sent to the control unit 100a.

  The light source unit 61 includes a wavelength scanning type (wavelength sweeping type) light source capable of scanning (sweeping) the wavelength of emitted light in the same manner as a general swept source type OCT apparatus. The light source unit 61 temporally changes the output wavelength in the near-infrared wavelength band that cannot be visually recognized by the human eye.

  The light L0 output from the light source unit 61 is guided to the polarization controller 63 by the optical fiber 62 and its polarization state is adjusted. The light L0 is guided to the fiber coupler 65 by the optical fiber 64 and converted into the measurement light LS and the reference light LR. Divided.

  The reference light LR is guided to the collimator 67 by the optical fiber 66A, converted into a parallel light beam, and guided to the corner cube 70 via the optical path length correction member 68 and the dispersion compensation member 69. The optical path length correction member 68 functions as a delay unit for matching the optical path length (optical distance) of the reference light LR with the optical path length of the measurement light LS. The dispersion compensation member 69 acts as a dispersion compensation means for matching the dispersion characteristics between the reference light LR and the measurement light LS.

  The corner cube 70 folds the traveling direction of the reference light LR in the reverse direction. The corner cube 70 is movable in a direction along the incident optical path and the outgoing optical path of the reference light LR, thereby changing the length of the optical path of the reference light LR. Note that any one of a means for changing the length of the optical path of the measurement light LS and a means for changing the length of the optical path of the reference light LR may be provided.

  The reference light LR that has passed through the corner cube 70 passes through the dispersion compensation member 69 and the optical path length correction member 68, is converted from a parallel light beam into a focused light beam by the collimator 71, enters the optical fiber 72, and is guided to the polarization controller 73. Accordingly, the polarization state of the reference light LR is adjusted. Further, the reference light LR is guided to the attenuator 75 by the optical fiber 74, and the light amount is adjusted under the control of the control unit 100. The reference light LR whose light amount has been adjusted is guided to the fiber coupler 77 by the optical fiber 76.

  On the other hand, the measurement light LS generated by the fiber coupler 65 is guided by the optical fiber 51 and emitted from the end face of the fiber, and is converted into a parallel light beam by the collimator lens 52. The measurement light LS converted into a parallel light beam is irradiated onto the eye E through the optical scanner 41, the focus lens 42, the deflection mirror 43, and the OCT objective lens 44. The measurement light LS is reflected and scattered at various depth positions of the eye E. The return light of the measurement light LS from the eye E includes reflected light and backscattered light, travels in the same direction as the forward path in the reverse direction, is guided to the fiber coupler 65, and passes through the optical fiber 66B to the fiber coupler 77. To reach.

  The fiber coupler 77 combines (interferences) the measurement light LS incident through the optical fiber 66B and the reference light LR incident through the optical fiber 76 to generate interference light. The fiber coupler 77 generates a pair of interference light LC by dividing the interference light at a predetermined branching ratio (for example, 1: 1). The pair of interference lights LC emitted from the fiber coupler 77 are guided to the detector 79 by optical fibers 78A and 78B, respectively.

  The detector 79 is, for example, a balanced photodiode that includes a pair of photodetectors that respectively detect a pair of interference lights LC and outputs a difference between detection results obtained by these. The detector 79 sends the detection result (detection signal) to the control unit 100a.

  In this example, swept source OCT is applied, but other types of OCT, such as spectral domain OCT, can be applied.

  FIG. 12 shows a configuration example of a control system of the ophthalmic microscope 1C according to this modification. 12, parts similar to those in FIG. 6 are given the same reference numerals, and description thereof will be omitted as appropriate. The control unit 100a executes control of each unit of the ophthalmic microscope 1C (see FIG. 12).

  The control unit 100a can execute control on the optical scanner 41 and the OCT system 60 in addition to the control executed by the control unit 100. As control of the optical scanner 41, for example, the measurement light LS is sequentially deflected so that the measurement light LS is irradiated to a plurality of positions according to a preset OCT scan pattern. In this embodiment, the control unit 100a causes the optical scanner 41 to perform a C scan. Control targets included in the OCT system 60 include a light source unit 61, a polarization controller 63, a corner cube 70, a polarization controller 73, an attenuator 75, a detector 79, and the like.

  The data processing unit 200a includes a scaling processing unit 210 and an OCT image forming unit 220. In addition to the processing executed by the data processing unit 200, the data processing unit 200a can execute processing for forming an OCT image.

  The OCT image forming unit 220 forms a C scan image (OCT image) of the eye E based on the detection result of the interference light LC obtained by the detector 79 of the OCT system 60. The control unit 100 a sends detection signals sequentially output from the detector 79 to the OCT image forming unit 220. The OCT image forming unit 220 performs, for example, Fourier transform or the like on the spectrum distribution based on the detection result obtained by the detector 79 for each series of wavelength scans (for each A line), thereby reflecting the reflection intensity profile in each A line. Form. Further, the OCT image forming unit 220 forms image data by imaging each A-line profile. Thereby, a B-scan image (cross-sectional image) and volume data (three-dimensional image data) are obtained.

  The data processing unit 200a may have a function of analyzing the image (OCT image) formed by the OCT image forming unit 220. This analysis function includes retinal thickness analysis and comparative analysis with normal eyes. Such an analysis function is executed using a known application. Further, the data processing unit 200 may have a function of analyzing an image acquired by the light receiving system 20. The data processing unit 200 may include an analysis function that combines analysis of an image acquired by the light receiving system 20 and analysis of an OCT image.

  When an external monitor is provided, the communication unit 400 transmits an image acquired by the ophthalmic microscope 1C (an image acquired by the light receiving system 20, an OCT image, etc.) to the external monitor substantially in real time. Can do.

  The control unit 100a includes a main eyepiece system control unit 101a and a sub eyepiece system control unit 102a. The main eyepiece system control unit 101a displays the OCT image formed by the OCT image forming unit 220 on at least one of the display units 31L and 31R as in the above embodiment. In the present modification, the sub-ocular system control unit 102a performs the same control as the images displayed on the display units 31L and 31R on the OCT image formed by the OCT image forming unit 220, and the sub-ocular system 80 It is displayed on the display parts 81L and 81R. That is, the sub-ocular system control unit 102a rotates the OCT image according to the position of the sub-ocular system 80 with respect to the main eye system 30 and displays it on at least one of the display units 81L and 81R. Thereby, the assistant can observe the OCT image of the surgical site with both eyes in the same manner as the surgeon.

  The data processing unit 200a (or the control unit 100a) may form a scan position image indicating a scan position with the preset measurement light LS. The main eyepiece system control unit 101a can display the formed scan position image on an image displayed on at least one of the display units 31L and 31R. Thereby, the surgeon can observe the operation part in three dimensions while confirming the scan position by the measurement light LS in the observation image of the operation part.

  Further, the sub-ocular system control unit 102a can rotate the scan position image in accordance with the position of the sub-ocular system 80 with respect to the main eye system 30, and display an overlay on the image displayed on at least one of the display units 81L and 81R. Is possible. Thereby, the assistant can observe the operation part with both eyes while confirming the scan position by the measurement light LS in the observation image of the operation part, like the operator. In particular, at the position of 180 degrees shown in FIG. 4, the assistant can observe the operation part in three dimensions while confirming the scan position by the measurement light LS in the observation image of the operation part, like the operator.

  The OCT system 60 is an example of an “interference optical system” according to this modification. The OCT image forming unit 220 is an example of an “image forming unit” according to this modification.

[effect]
An ophthalmic microscope (an ophthalmic microscope 1C) according to a modification of the embodiment may include an interference optical system (OCT system 60), an optical scanner (optical scanner 41), and an image forming unit (OCT image forming unit 220). Good. The interference optical system divides light (light L0) from the OCT light source (light source unit 61) into measurement light (measurement light LS) and reference light (reference light LR), and returns the measurement light irradiated to the eye to be examined. Interference light (interference light LC) between the light and the reference light is detected. The optical scanner is used to scan the eye to be examined with measurement light. The image forming unit forms an OCT image based on the detection result of the interference light by the interference optical system obtained by performing the C scan by the optical scanner. The control unit (main eyepiece system control unit 101a) displays the OCT image on at least one of the left display unit and the right display unit. The control unit (sub-ocular system control unit 102a) rotates the OCT image according to the position of the sub-ocular system with respect to the main eye system and displays the OCT image on at least one of the pair of display units.

  According to such a configuration, the observer using the sub-ocular system can observe the observation site with binoculars as in the case of the observer using the main eye-piece system also for the OCT image.

  In the ophthalmic microscope according to the modification of the embodiment, the control unit (main eyepiece system control unit 101a) displays a scan position image indicating the scan position by the measurement light on at least one of the left display unit and the right display unit. Overlaid on the selected image. The control unit (second eyepiece system control unit 102a) rotates the scan position image according to the position of the second eyepiece system with respect to the main eyepiece system, and displays an overlay display on the image displayed on at least one of the pair of display units.

  According to such a configuration, the observer who uses the sub-ocular system can observe the scan position image displayed as an overlay on the image of the observation site, similarly to the observer who uses the main eye-piece system. In addition, an observer using the auxiliary eyepiece system can observe the surgical site with both eyes while confirming the scan position by the measurement light in the image of the surgical site, similarly to the observer using the main eyepiece system.

  In the above-described embodiment or its modification, the auxiliary eyepiece system may be included in a head mounted display (HMD) that can be mounted on the head of the assistant or a portable device. In this case, image data may be sent to the sub-ocular system via the wireless communication path by the control unit 100, and an image based on the received image data may be displayed on the display units 81L and 81R. The position detection unit 110 may detect the position of the sub-ocular system 80 in a room such as an operating room by a known position detection method using an RFID, a magnetic sensor, or the like.

  It is possible to arbitrarily combine the configurations described in the above embodiment or its modification.

1 Ophthalmic microscope 10, 10L, 10R Illumination system 20, 20L, 20R Light receiving system 23, 23L, 23R Image sensor 30, 30L, 30R Main eyepiece system 31L, 31R, 81L, 81R Display unit 32L, 32R, 82L, 82R Eyepiece Lens system 80, 80L, 80R Secondary eyepiece system 100 Control unit E Eye to be examined

Claims (7)

An illumination system that illuminates the eye to be examined; and
A light receiving system that includes a left imaging element and a right imaging element, and guides the return light of the illumination light irradiated to the eye to be examined to each of the left imaging element and the right imaging element;
A main eyepiece system including a left display unit, a left eyepiece lens system disposed on the display surface side of the left display unit, a right display unit, and a right eyepiece lens system disposed on the display surface side of the right display unit When,
A sub-ocular system including a pair of display units and a pair of eyepiece lens systems disposed on the respective display surface sides of the pair of display units;
An image based on the output from the left image sensor is displayed on the left display unit, an image based on the output from the right image sensor is displayed on the right display unit, and at least one of the left image sensor and the right image sensor A control unit that rotates an image based on an output from the main eyepiece system according to a position of the sub-ocular system and displays the image on the pair of display units;
Including ophthalmic microscope. A position detection unit that detects a position of the sub-ocular system with respect to the main eye system;
The ophthalmic microscope according to claim 1, wherein the control unit rotates an image based on an output from at least one of the left imaging element and the right imaging element based on a detection result by the position detection unit. . Including two or more of the accessory eyepiece systems;
The control unit causes the pair of display units of each of the two or more secondary eyepiece systems to display an image rotated according to the position of the secondary eyepiece system with respect to the main eyepiece system. Or the ophthalmic microscope of Claim 2. When the secondary eyepiece system is positioned within a predetermined range including a position directly facing the main eyepiece system, the control unit displays 180 images displayed on the left display unit on the right eye side of the pair of display units. 4. The display according to claim 1, wherein the image displayed on the right display unit is rotated 180 degrees and displayed on the left eye side of the pair of display units. The ophthalmic microscope according to Item. When the sub-ocular system is positioned outside the predetermined range, the control unit displays an image displayed on a display unit close to the sub-ocular system among the left display unit and the right display unit. The ophthalmic microscope according to claim 4, wherein the ophthalmic microscope is displayed on both sides. An interference optical system that divides light from the OCT light source into measurement light and reference light, and detects interference light between the return light of the measurement light irradiated on the eye to be examined and the reference light;
An optical scanner for scanning the eye with the measurement light;
An image forming unit that forms an OCT image based on a detection result of the interference light by the interference optical system obtained by performing a C scan by the optical scanner;
Including
The control unit displays the OCT image on at least one of the left display unit and the right display unit, and rotates the OCT image according to the position of the sub-ocular system with respect to the main eye-piece system to thereby display the pair of displays. The ophthalmic microscope according to any one of claims 1 to 5, wherein the ophthalmic microscope is displayed on at least one of the sections. The controller is
A scan position image indicating a scan position by the measurement light is displayed as an overlay on the image displayed on at least one of the left display unit and the right display unit,
The scan position image is rotated according to the position of the sub-eyepiece system with respect to the main eyepiece system, and is overlaid on the image displayed on at least one of the pair of display units. Ophthalmic microscope.

Images