JP6638050B2 - Ophthalmic surgery microscope and ophthalmic surgery attachment - Google Patents

Description

  The present invention relates to an ophthalmic surgical microscope and an ophthalmic surgical attachment.

  In the field of ophthalmology, various operations are performed. Representative examples include cataract surgery and retinal vitreous surgery. In such an operation, an ophthalmic surgical microscope is used. The ophthalmic surgery microscope is used for observing an eye to be inspected illuminated by an illumination system with the naked eye or capturing an image through an observation system.

  Some ophthalmic surgery microscopes are equipped with an optical coherence tomography (hereinafter, OCT) device (for example, see Patent Documents 1 to 5). The OCT apparatus is used for acquiring a cross-sectional image or a three-dimensional image, measuring the size of a tissue (such as the thickness of a layer), acquiring functional information (such as blood flow information), and the like.

  Specifications required for such an OCT apparatus include high resolution, obtaining an OCT signal of sufficient intensity, a wide scan range, and a compact configuration. In order to satisfy these specifications, the position where the OCT optical path is coupled to the optical path of the microscope for ophthalmologic surgery is important.

  In the surgical microscopes disclosed in Patent Documents 1 to 4, an OCT optical path is connected to an observation optical path. In the surgical microscope disclosed in Patent Document 5, an OCT optical path is coupled to an illumination optical path, and these optical paths are coupled to an observation optical path.

JP 2008-264488 A JP 2008-264490 A JP 2008-268852 A JP 2009-230141 A JP 2008-264489 A

  The configuration in which the OCT optical path is coupled to the observation optical path as in Patent Literatures 1 to 4 has a problem that a sufficient resolution cannot be obtained due to the limitation of the diameter of a lens arranged in the observation optical path. In order to avoid this problem, a configuration in which the OCT optical path is coupled to the observation optical path at a position between the objective lens and the eye to be examined is also conceivable. However, there is a problem that the apparatus is not compact, and there is an obstacle to the operation and operation performed by the operator. Problem. Further, in the configuration disclosed in Patent Literature 5, the illumination optical path and the OCT optical path are coupled at a position between lenses constituting a lens group (lens unit) for converting the illumination light into a parallel light beam. There is a problem that the design becomes complicated, and it becomes difficult to make the surgical microscope compact and to modularize the OCT device that can be mounted on the surgical microscope.

  The present invention has been made in order to solve such a problem, and an object of the present invention is to provide an ophthalmic surgical microscope and an ophthalmic surgical attachment capable of performing a wide range and high-resolution OCT inspection with a compact configuration. It is in.

The microscope for ophthalmologic surgery according to the embodiment includes an objective lens, a diaphragm irradiated with light including visible light from an illumination light source, and a lens unit having one or more lenses that converts light passing through the diaphragm into a parallel light flux. An illumination system for irradiating the subject's eye with light passing through the lens unit via the objective lens; an observation system for observing the subject's eye illuminated by the illumination system via the objective lens ; An OCT system that emits the measurement light out of the measurement light and the reference light obtained by splitting the light, and generates interference light by causing the reference light and the return light of the measurement light from the eye to be examined to interfere with each other; An eye surgery attachment that is detachable from the microscope. The attachment for ophthalmic surgery includes a collimating lens that converts the measuring light into a parallel light beam, an optical scanner that two-dimensionally deflects the measuring light converted into a parallel light by the collimating lens, and an OCT through which the measuring light deflected by the optical scanner passes. A lens and an optical path coupling member for coupling the optical path of the measurement light passing through the OCT lens to the optical path of the illumination system. When mounted on the ophthalmic surgery microscope, the optical path coupling member is disposed between the diaphragm and the lens unit.
An attachment for ophthalmic surgery according to an embodiment includes an objective lens, a diaphragm irradiated with light including visible light from an illumination light source, and a lens unit including one or more lenses that converts light passing through the diaphragm into a parallel light flux. An illumination system for irradiating a subject's eye with light passing through a lens unit via an objective lens, and an observation system for observing the subject's eye illuminated by the illumination system via the objective lens. An attachment for ophthalmologic surgery configured to be detachable from a microscope and for inspecting an eye to be inspected through an objective lens by optical coherence tomography, and a measurement light obtained by splitting light from an OCT light source. And an interference optical system that emits measurement light of the reference light and causes interference between the reference light and return light of the measurement light from the eye to be examined to generate interference light. Lens that converts the measured light into a parallel light beam, an optical scanner that two-dimensionally deflects the measurement light that has been converted into a parallel light beam by the collimator lens, an OCT lens through which the measurement light deflected by the optical scanner passes, and an OCT lens An optical path coupling member for coupling the optical path of the measurement light that has passed through to the optical path of the illumination system, and when the optical path coupling member is mounted on the microscope for ophthalmologic surgery, the optical path coupling member is between the diaphragm and the lens unit or the lens unit. And an objective lens.

  ADVANTAGE OF THE INVENTION According to the microscope for ophthalmologic surgery and the attachment for ophthalmologic surgery pertaining to the present invention, a wide range and high resolution OCT examination can be performed with a compact configuration.

FIG. 1 is a schematic diagram illustrating a configuration example of an optical system of an ophthalmic surgery microscope according to an embodiment. FIG. 1 is a schematic diagram illustrating a configuration example of an optical system of an ophthalmic surgery microscope according to an embodiment. FIG. 1 is a schematic diagram illustrating a configuration example of an optical system of an ophthalmic surgery microscope according to an embodiment. FIG. 4 is an explanatory view of the operation of the microscope for ophthalmologic surgery pertaining to the embodiment. FIG. 4 is an explanatory view of the operation of the microscope for ophthalmologic surgery pertaining to the embodiment. FIG. 4 is an explanatory view of the operation of the microscope for ophthalmologic surgery pertaining to the embodiment. FIG. 4 is an explanatory view of the operation of the microscope for ophthalmologic surgery pertaining to the embodiment. FIG. 1 is a schematic diagram illustrating a configuration example of an optical system of an ophthalmic surgery microscope according to an embodiment. FIG. 1 is a schematic diagram illustrating a configuration example of an optical system of an ophthalmic surgery microscope according to an embodiment. FIG. 4 is an explanatory view of the operation of the microscope for ophthalmologic surgery pertaining to the embodiment. FIG. 4 is an explanatory view of the operation of the microscope for ophthalmologic surgery pertaining to the embodiment. FIG. 1 is a schematic diagram illustrating a configuration example of an optical system of an ophthalmic surgery microscope according to an embodiment. FIG. 1 is a schematic diagram illustrating a configuration example of an optical system of an ophthalmic surgery microscope according to an embodiment. FIG. 1 is a schematic diagram illustrating a configuration example of an optical system of an ophthalmic surgery microscope according to an embodiment. FIG. 4 is an explanatory view of the operation of the microscope for ophthalmologic surgery pertaining to the embodiment. FIG. 4 is an explanatory view of the operation of the microscope for ophthalmologic surgery pertaining to the embodiment.

  An example of an embodiment of the microscope for ophthalmic surgery and the attachment for ophthalmic surgery according to the present invention will be described in detail with reference to the drawings. The microscope for ophthalmic surgery according to the following embodiments is used in ophthalmic surgery. The microscope for ophthalmologic surgery according to the embodiment is an apparatus that illuminates an eye to be inspected (patient's eye) with an illumination system and causes the returned light to enter an observation system, thereby acquiring an observation image of the eye to be inspected. The ophthalmic surgical attachment is configured to be detachable from the ophthalmic surgical microscope.

  The microscope for ophthalmologic surgery according to the following embodiments can perform an OCT examination in a state where an attachment for ophthalmic surgery including at least a part of the OCT optical system is mounted. In this specification, the OCT examination includes acquisition of a cross-sectional image or a three-dimensional image, measurement of tissue size (layer thickness or the like), acquisition of functional information (blood flow information or the like), and the like. The site to be inspected by OCT may be any site of the eye to be inspected, and may be, for example, a cornea, a vitreous body, a lens, a ciliary body, or the like in an anterior eye, or a retina in a posterior eye. Or the choroid or the vitreous body. In addition, the inspection target site may be a site around the eye such as an eyelid or an eye socket. By a known method, it is possible to form a cross-sectional image or a three-dimensional image of the eye to be inspected based on the return light of the measurement light via the attachment for ophthalmologic surgery.

  In this specification, measurement light for performing an OCT examination and return light of measurement light from an eye to be examined may be collectively referred to as OCT light. Images acquired by OCT may be collectively referred to as OCT images. Further, a measurement operation for forming an OCT image may be referred to as OCT measurement. The contents of the documents described in this specification can be appropriately used as the contents of the following embodiments.

  In the following embodiment, a configuration to which Fourier domain type OCT is applied will be described. In particular, the microscope for ophthalmologic surgery (attachment for ophthalmologic surgery) according to the embodiment enables the OCT examination of the eye to be examined using a known swept-source OCT technique.

  The configuration according to the present invention can be applied to a type other than the swept source, for example, an ophthalmic surgical microscope using a technique of the spectral domain OCT. In the following embodiments, an apparatus combining an OCT apparatus including an OCT optical system and a microscope for ophthalmologic surgery will be described. However, an ophthalmic observation apparatus other than a microscope for ophthalmologic surgery, for example, a scanning laser ophthalmoscope (Scanning Laser Ophthalmoscope). : SLO), a slit lamp, a fundus camera and the like can be combined with the OCT apparatus having the configuration according to the present invention.

<First embodiment>
1 and 2 show an optical system of a microscope for ophthalmologic surgery according to this embodiment. FIG. 1 shows a configuration of an optical system of an observation system when viewed from an operator side. FIG. 2 illustrates the configuration of the illumination system and the optical system of the interference optical system in FIG. 1 when viewed from the side when viewed from the operator. 2, the same parts as those in FIG. 1 are denoted by the same reference numerals. Note that, in addition to the configuration shown in FIGS. 1 and 2, an optical system (assistant microscope) for an operator's assistant to observe the eye E can be provided.

  In this embodiment, directions such as up and down, left and right, and front and back are directions viewed from the surgeon unless otherwise specified. Regarding the vertical direction, the direction from the objective lens toward the observation target (eye E) is defined as the lower direction, and the opposite direction is defined as the upper direction. In general, since a patient performs an operation while lying on his back, the vertical direction is the same as the vertical direction.

  The optical system of the microscope for ophthalmologic surgery 1 includes an illumination system 10, an OCT system 20, an optical path coupling member 30, a deflection member 40, an observation system 50, and an objective lens 70. The microscope for ophthalmologic surgery 1 includes an attachment for ophthalmologic surgery 100 which is configured to be detachable from the microscope for ophthalmic surgery. At least a part of the OCT system 20 (for example, the collimator lens 22, the optical scanner 23, the OCT lens 24) and the optical path coupling member 30 are provided in the ophthalmic surgery attachment 100. Hereinafter, the illumination system 10, the OCT system 20, the optical path coupling member 30, and the deflection member 40 will be described mainly with reference to FIG. The observation system 50 will be described mainly with reference to FIG.

  The microscope for ophthalmologic surgery 1 may be configured to include a head lens 200 that is configured to be insertable and removable at a position on the optical axis of an objective lens 70 as a main objective lens. The head lens 200 can be arranged at a position between the front focal position of the objective lens 70 and the eye E to be inspected. The head lens 200 focuses the light from the illumination system 10 and illuminates the inside of the eye E (the posterior segment of the retina or the vitreous body) of the eye E to be examined. As the head lens 200, a plurality of lenses having different refractive powers (for example, 40D, 80D, 120D, etc.) are prepared, and these are used alternatively. FIG. 1 shows a state where the head lens 200 is retracted from a position on the optical axis of the objective lens 70. FIG. 2 shows a state where the head lens 200 is inserted at a position on the optical axis of the objective lens 70.

(Lighting system)
The illumination system 10 includes an illumination light source 11, a condenser lens 12, a stop (illumination field stop, field stop) 13, and a lens unit 14. The illumination light source 11 emits illumination light including visible light. The condenser lens 12 condenses the illumination light emitted from the illumination light source 11. The aperture 13 limits an illumination field due to the illumination light condensed by the condenser lens 12. The diaphragm 13 is provided at a position optically conjugate with the front focal position of the objective lens 70. The lens unit 14 has one or more lenses that convert light passing through the aperture 13 into a parallel light beam. Although FIG. 2 illustrates an example in which the lens unit 14 includes one lens, the lens unit 14 may include two or more lenses. The illumination light that has passed through the lens unit 14 is emitted toward the eye E through the objective lens 70 of the observation system 50.

(OCT type)
The OCT system 20 includes an optical system for inspecting the eye E through the objective lens 70 by OCT. The OCT system 20 has a configuration similar to that of a conventional Fourier domain type (for example, swept source type) OCT apparatus. That is, the OCT system 20 includes an interference optical system 21, a collimating lens 22, a focus adjustment mechanism 22A, an optical scanner 23, and an OCT lens 24.

  The interference optical system 21 emits the measurement light out of the measurement light and the reference light obtained by splitting the light from the OCT light source, and causes the reference light and the return light of the measurement light from the eye to interfere to interfere with each other. Generate light. The interference optical system 21 includes, for example, a division unit and an interference unit. The splitting unit splits light from an OCT light source (for example, a wavelength-swept light source) into measurement light and reference light. The OCT light source emits light in a near-infrared wavelength band that cannot be visually recognized by human eyes. The measurement light is emitted toward the eye E. The reference light is emitted toward a predetermined reference light path. The interference unit causes the return light of the measurement light passing through the eye E to interfere with the reference light passing through the reference optical path to generate interference light. The interference light generated by the interference optical system 21 is detected by a detection unit (not shown). The detection signal obtained by the detection unit is sent to an arithmetic and control unit (not shown). The arithmetic and control unit performs arithmetic processing such as Fourier transform on the detection signal, similarly to the conventional swept source type OCT apparatus. Note that the interference optical system 21 may be configured to include an OCT light source.

  For example, one end of an optical fiber is connected to the interference optical system 21. The other end of the optical fiber is arranged at a position facing the collimator lens 22. The measurement light emitted from the interference optical system 21 is guided by an optical fiber and enters the collimator lens 22. The return light of the measurement light that has passed through the collimator lens 22 is guided by the optical fiber, and enters the division part of the interference optical system 21.

  The collimator lens 22 converts the measurement light emitted from the interference optical system 21 into a parallel light beam. The focus adjustment mechanism 22A moves the collimator lens 22 along the optical axis of the OCT system 20. For example, the focus adjustment mechanism 22A includes a holding member that holds the collimating lens 22, a slide mechanism that moves the holding member in the optical axis direction of the OCT system 20, an actuator that generates a driving force, and a slide mechanism that generates the driving force. And a member for transmitting to the The focus adjustment mechanism 22A can move the collimator lens 22 manually or automatically. When moving manually, the focus adjustment mechanism 22A can move the collimating lens 22 by controlling an actuator based on the operation of a user (for example, an operator) on an operation unit (not shown). In the case of automatic movement, the focus adjustment mechanism 22A controls, for example, a control unit (not shown) such that the intensity of the return light, the interference light, and the detection signal of the measurement light from the eye E becomes equal to or higher than a predetermined intensity. Thus, the collimator lens 22 can be moved.

  The optical scanner 23 two-dimensionally deflects the measurement light converted into a parallel light beam by the collimator lens 22. Thereby, the optical scanner 23 can scan the eye E with the measurement light converted into the parallel light flux. The optical scanner 23 deflects the measurement light in a second direction orthogonal to the first direction, and a first galvano mirror that deflects the measurement light in a first direction within a scan plane set for the eye E, for example. It is configured to include a second galvanometer mirror and a mechanism for independently driving them. In this case, the optical scanner 23 can scan the eye E with the measurement light in an arbitrary direction on a plane specified by the first direction and the second direction.

  The OCT lens 24 is disposed between the optical scanner 23 and the optical path coupling member 30, and functions as a variable power lens. The measurement light deflected by the optical scanner 23 passes through the OCT lens 24 and is guided to the optical path coupling member 30.

  The optical path coupling member 30 is arranged between the stop 13 and the lens unit 14 in the optical path of the illumination system 10, and couples the optical path of the OCT system 20 to the optical path of the illumination system 10. Specifically, the optical path coupling member 30 is disposed so as to face a lens provided at a position optically closest to the illumination light source 11 among one or more lenses constituting the lens unit 14. In this embodiment, the optical axis of the illumination system 10 and the optical axis of the OCT system 20 are arranged so as to be coaxial. For example, on the reflecting surface of the optical path coupling member 30, the OCT system 20 is arranged such that the position of the optical axis thereof matches the position of the optical system of the illumination system 10. An example of the optical path coupling member 30 includes a dichroic mirror. The collimator lens 22, the focus adjustment mechanism 22A, the optical scanner 23, the OCT lens 24, and the optical path coupling member 30 are provided in the ophthalmic surgery attachment 100. Furthermore, the interference optical system 21 may be provided in the attachment 100 for ophthalmic surgery. Furthermore, an OCT light source may be provided in the attachment 100 for ophthalmic surgery.

  The deflecting member 40 is disposed between the optical path coupling member 30 and the objective lens 70, and deflects light on the optical path of the illumination system 10 and light on the optical path of the OCT system 20 toward the objective lens 70. The deflection member 40 may be included in the observation system 50. Examples of the deflecting member 40 include a beam splitter, a half mirror, a dichroic mirror, and an epi-illumination mirror including one or more reflecting members. FIG. 1 shows a case where the deflecting member 40 is a beam splitter, and FIG. 2 shows a case where the deflecting member 40 is an epi-illumination mirror constituted by two reflecting members 40a and 40b.

  When the deflecting member 40 is a beam splitter, the deflecting member 40 is arranged in the optical path of the observation system 50. In this case, the beam splitter (deflection member 40) coaxially couples the optical path of the observation system 50 and the optical path of the OCT system 20.

  When the deflecting member 40 is an epi-illumination mirror, the deflecting member 40 is desirably arranged outside the optical path of the observation system 50. In FIG. 2, light that has passed through the lens unit 14 is reflected by the reflecting members 40a and 40b. The reflection member 40a is arranged to reflect light that has not been reflected by the reflection member 40b among the light that has passed through the lens unit 14.

(Observation system)
The observation system 50 includes an optical system for observing the eye E illuminated by the illumination system 10 via the objective lens 70. As shown in FIG. 1, the observation system 50 includes a pair of left and right observation systems 50L and 50R, and a photographic optical system 60. The left observation system 50L is called a left observation system (left observation optical axis 50La), and the right observation system 50R is called a right observation system (right observation optical axis 50Ra). The left and right observation systems 50L and 50R are disposed so as to sandwich the optical axis of the objective lens 70.

  The left and right observation systems 50L and 50R include a variable power lens system 51, an imaging lens 52, an image erecting prism 53, an interpupillary distance adjusting prism 54, a field stop 55, and an eyepiece 56, respectively. In the right observation system 50R, a beam splitter 57 is provided between the variable power lens system 51 and the imaging lens 52.

  The variable power lens system 51 includes a plurality of zoom lenses 51a, 51b, 51c. Each of the zoom lenses 51a to 51c is movable in a direction along the left observation optical axis 50La or the right observation optical axis 50Ra by a zoom mechanism (not shown). Thereby, the magnification for observing or photographing the eye E is changed.

  The beam splitter 57 separates a part of the observation light guided along the right observation optical axis 50Ra from the eye E and guides it to the imaging optical system 60. The imaging optical system 60 includes an imaging lens 61, a reflection mirror 62, and an imaging unit 63.

  The imaging unit 63 includes an imaging element 63a. The imaging element 63a is configured by, for example, a CCD (Charge Coupled Devices) image sensor, a CMOS (Complementary Metal Oxide Semiconductor) image sensor, or the like. An image sensor 63a having a two-dimensional light receiving surface (area sensor) is used.

  When the microscope for ophthalmologic surgery 1 is used, the light receiving surface of the imaging element 63a is, for example, at a position optically conjugate with the surface of the cornea of the eye E to be examined, or at a depth from the corneal vertex by １ ／ of the corneal curvature radius. It is arranged at a position optically conjugate with a position separated in the direction.

  The image erecting prism 53 converts an inverted image into an erect image. The interpupillary distance adjusting prism 54 is an optical element for adjusting the distance between the left and right observation lights according to the interpupillary distance of the operator (the distance between the left and right eyes). The field stop 55 blocks the peripheral area in the cross section of the observation light and limits the field of view of the operator.

  In the configuration as described above, the microscope for ophthalmologic surgery 1 can irradiate the eye E with illumination light and observe the eye E regardless of the mounting state of the attachment 100 for ophthalmologic surgery. That is, the illumination light output from the illumination light source 11 is condensed by the condenser lens 12, passes through the stop 13 and the optical path coupling member 30, and is converted into a parallel light beam by the lens unit 14. The illumination light that has been converted into a parallel light beam is deflected by the deflecting member 40, and is emitted to the eye E through the objective lens 70. When the head lens 200 is inserted at a position on the optical axis of the objective lens 70, the illumination light deflected by the deflecting member 40 is applied to the eye E through the objective lens 70 and the head lens 200. You.

  The illumination light (part of) applied to the eye E is reflected in the cornea or the eye. The reflected light (sometimes referred to as observation light) of the illumination light from the eye E enters the observation system 50 via the objective lens 70 (the front lens 200 in some cases). With such a configuration, it becomes possible to observe an enlarged image of the eye E through the eyepiece 56. In addition, a captured image using the imaging unit 63 can be displayed on a display unit (not shown).

  When the attachment 100 for ophthalmic surgery is mounted on the microscope 1 for ophthalmic surgery, the optical path coupling member 30 is disposed between the aperture 13 and the lens unit 14. The measurement light obtained by splitting the light from the OCT light source is reflected by the optical path coupling member 30 via the collimator lens 22, the optical scanner 23, and the OCT lens 24. The measuring light reflected by the optical path coupling member 30 is deflected by the deflecting member 40 via the lens unit 14, and then passes through the objective lens 70 (and, in some cases, the front lens 200). To the eye E to be examined. The return light of the measurement light reflected by the eye E returns to the interference optical system 21 through the same path as described above. The interference optical system 21 generates interference light by causing the reference light obtained by dividing the light from the OCT light source to interfere with the return light of the measurement light. The interference light generated by the interference optical system 21 is detected by a detection unit (not shown). The detection signal obtained by the detection unit is sent to an arithmetic and control unit (not shown). The arithmetic and control unit performs arithmetic processing such as Fourier transform on the detection signal, similarly to the conventional swept source type OCT apparatus. The arithmetic control unit forms a cross-sectional image or a three-dimensional image of a predetermined portion of the eye E, measures the size of a tissue (thickness of a layer, etc.), and acquires functional information (blood flow) based on the result of the arithmetic processing. Information, etc.).

  According to this embodiment, the aperture of the optical element through which the measurement light of the OCT system 20 and the return light (OCT light) of the measurement light pass can be increased, so that the aperture that affects the resolution of the measurement light of the OCT system 20 can be increased. It is possible to design a large scan range by the number and measurement light. Further, since the optical path of the OCT system 20 is coupled to the optical path of the illumination system 10 at a position between the stop 13 and the lens unit 14, the lens unit 14 can be shared between the illumination system 10 and the OCT system 20. It is possible to realize a compact apparatus by reducing the number of optical elements.

  In general, a relatively large physical space can be secured between the diaphragm 13 and the lens unit 14. Therefore, by forming the collimating lens 22, the optical scanner 23, the OCT lens 24, and the optical path coupling member 30 into a module, the ophthalmology can be controlled without affecting the optical system such as the displacement of the diaphragm 13 or the displacement of the axis due to vibration or the like. It is possible to provide the attachment 100 for ophthalmic surgery that can be easily attached to and detached from the surgical microscope 1. An adjustment mechanism for adjusting the position of the diaphragm 13 and the axis thereof may be provided.

  Note that, in this embodiment, at least a part of the OCT system 20 and the optical path coupling member 30 are modularized as the ophthalmic surgery attachment 100, but these may not be modularized.

[Action / Effect]
The operation and effect of the microscope for ophthalmologic surgery and the attachment for ophthalmologic surgery according to the embodiment will be described.

  The microscope for ophthalmic surgery (for example, the microscope for ophthalmic surgery 1) according to the embodiment includes an objective lens (for example, the objective lens 70), an illumination system (for example, the illumination system 10), and an observation system (for example, the observation system 50). , An OCT system (for example, the OCT system 20), and an optical path coupling member (for example, the optical path coupling member 30). The illumination system includes a stop (for example, the stop 13) and a lens unit (for example, the lens unit 14), and irradiates light passing through the lens unit to the eye to be inspected (for example, the eye E) via the objective lens. . The aperture is irradiated with light from a light source. The lens unit has one or more lenses that convert light passing through the aperture into a parallel light beam. The observation system is used for observing an eye to be inspected illuminated by the illumination system via an objective lens. The OCT system is used for examining an eye to be examined by an OCT through an objective lens. The optical path coupling member is disposed between the stop and the lens unit, and couples the optical path of the OCT system to the optical path of the illumination system.

  According to such a configuration, in the microscope for ophthalmologic surgery used for surgery on the eye to be inspected, the diameter of the optical element through which the measurement light of the OCT system passes can be increased, so that the resolution of the measurement light of the OCT system is affected. It is possible to design a large numerical aperture and a large scan range using the measurement light. Further, since the optical path of the OCT system is coupled to the optical path of the illumination system at the position between the stop and the lens unit, the lens unit can be shared between the illumination system and the OCT system, and the number of optical elements can be reduced. Makes it possible to realize a compact device. Further, since the optical path of the OCT system is coupled to the optical path of the illumination system, a wide range and high resolution OCT inspection can be performed.

  Further, the microscope for ophthalmologic surgery is disposed between the optical path coupling member and the objective lens, and deflects a light (for example, a deflecting member) that deflects light on the optical path of the illumination system and light on the optical path of the OCT system toward the objective lens. 40).

  According to such a configuration, since the eye to be inspected can be illuminated from the objective lens side, the apparatus can be made compact.

  Further, the deflecting member may include a beam splitter disposed in an optical path of the observation system.

  According to such a configuration, the deflecting member for deflecting the illumination light and the light of the OCT system can be arranged in the observation optical path, so that the apparatus can be made compact.

  Further, the beam splitter may coaxially couple the optical path of the observation system and the optical path of the OCT system.

  According to such a configuration, it becomes possible to perform an OCT inspection on the subject's eye under conditions close to those observed by the observation system.

  Further, the OCT system emits the measurement light out of the measurement light and the reference light obtained by dividing the light from the OCT light source, and causes the interference between the reference light and the return light of the measurement light from the eye to be examined. A collimator lens (for example, a collimator lens 22) that converts the measurement light emitted from an interference optical system (for example, the interference optical system 21) that generates light into a parallel light beam, and the two-dimensional measurement light that is made into a parallel light beam by the collimator lens. The optical scanner may include an optical scanner (for example, the optical scanner 23) that deflects the light, and an OCT lens (for example, the OCT lens 24) disposed between the optical scanner and the optical path coupling member.

  According to such a configuration, an OCT examination can be performed by a known method in a microscope for ophthalmologic surgery used for surgery on the eye to be inspected.

  Further, the microscope for ophthalmologic surgery may include a focus adjustment mechanism (for example, a focus adjustment mechanism 22A) that moves the collimator lens along the optical axis of the OCT system.

  According to such a configuration, it is possible to perform a high-resolution OCT examination in an optimal examination state in a microscope for ophthalmologic surgery used for surgery on the eye to be examined.

  Further, the microscope for ophthalmic surgery includes an attachment for ophthalmic surgery (for example, the attachment for ophthalmic surgery 100) configured to be detachable from the microscope for ophthalmic surgery, and includes a collimating lens, an optical scanner, an OCT lens, and an optical path coupling member. May be provided in an ophthalmic surgery attachment.

  According to such a configuration, the collimating lens, the optical scanner, the OCT lens, and the optical path coupling member are modularized so that they can be attached to and detached from the ophthalmic surgery microscope. Can be switched.

  Further, an attachment for ophthalmic surgery configured to be detachable from an ophthalmic surgery microscope and for inspecting an eye to be inspected through an objective lens by OCT includes a collimating lens, an optical scanner, an OCT lens, and an optical path coupling member. When mounted on an ophthalmic surgery microscope, the optical path coupling member may be disposed between the diaphragm and the lens unit. The microscope for ophthalmic surgery includes an objective lens, a stop irradiated with light from a light source, and a lens unit having one or more lenses that converts light passing through the stop into a parallel light beam. The illumination system includes an illumination system for irradiating the eye to be inspected via the objective lens, and an observation system for observing the eye to be inspected illuminated by the illumination system via the objective lens. The interference optical system emits the measurement light out of the measurement light and the reference light obtained by splitting the light from the OCT light source, and interferes the reference light with the return light of the measurement light from the eye to be examined, thereby causing interference light. Generate The collimator lens converts the measurement light emitted from the interference optical system into a parallel light beam. The optical scanner two-dimensionally deflects the measurement light collimated by the collimator lens. The measurement light deflected by the optical scanner passes through the OCT lens. The optical path coupling member is used to couple the optical path of the measurement light that has passed through the OCT lens to the optical path of the illumination system.

  According to such a configuration, the collimating lens, the optical scanner, the OCT lens, and the optical path coupling member can be modularized to provide an ophthalmic surgery attachment that can be easily attached to and detached from the ophthalmic surgery microscope. Generally, a relatively large physical space can be ensured between the diaphragm and the lens unit or between the lens unit and the objective lens. Therefore, the microscope for ophthalmologic surgery can be switched to a device capable of OCT inspection without affecting the optical system such as the displacement of the diaphragm and the displacement of the axis.

<Second embodiment>
In the first embodiment, since the illumination optical path and the OCT optical path are coaxially coupled, vignetting may occur in the measurement light or the like from the OCT system 20 due to the deflection member 40 or the iris (pupil) of the eye E to be inspected. . In particular, when the deflecting member 40 is formed by an epi-illumination mirror, the reflection member constituting the epi-illumination mirror has a complicated shape, and thus vignetting may occur in the measurement light from the OCT system 20 and the like. When vignetting occurs in the measurement light, the range of the OCT scan is limited, and the performance of the OCT system 20 cannot be sufficiently exhibited.

  Therefore, in the second embodiment, the optical axis of the illumination system and the optical axis of the OCT system are arranged so as to be non-coaxial. The optical axis of the illumination system and the optical axis of the OCT system may be fixed so as to be non-coaxial, or the optical axis may be adjusted by relatively moving both optical axes as in this embodiment. It may be.

  The configuration of the microscope for ophthalmologic surgery according to the second embodiment is the same as that of the first embodiment. Hereinafter, the second embodiment will be described focusing on differences from the first embodiment.

  FIG. 3 shows an optical system of a microscope for ophthalmologic surgery according to the second embodiment. 3, the same parts as those in FIG. 2 are denoted by the same reference numerals, and the description will be appropriately omitted.

  The configuration of the microscope for ophthalmologic surgery 1a according to the second embodiment is different from the configuration of the microscope for ophthalmologic surgery 1 according to the first embodiment in that it includes an optical axis adjusting mechanism 21A. The OCT system 20a includes an interference optical system 21, an optical axis adjustment mechanism 21A, a collimator lens 22, a focus adjustment mechanism 22A, an optical scanner 23, and an OCT lens 24. The attachment 100a for ophthalmic surgery includes a collimator lens 22, a focus adjustment mechanism 22A, an optical scanner 23, an OCT lens 24, and an optical path coupling member 30. The attachment 100a for ophthalmic surgery may further include an interference optical system 21 and an optical axis adjustment mechanism 21A. The ophthalmic surgery attachment 100a may further include an OCT light source.

  The optical axis adjusting mechanism 21A relatively moves the optical axis of the illumination system 10 and the optical axis of the OCT system 20. The optical axis adjusting mechanism 21A relatively moves the optical axis of the illumination system 10 and the optical axis of the OCT system 20 by changing the direction of the measurement light emitted from the interference optical system 21, for example. As a method of changing the direction of the measurement light emitted from the interference optical system 21, a method of tilting an end of an optical fiber that emits the measurement light from the interference optical system 21, a case holding an optical element constituting the interference optical system 21, There is a method of leaning the body itself. When the end of the optical fiber is tilted, the optical axis adjustment mechanism 21A includes a holding member that movably holds the other end of the optical fiber connected at one end to the interference optical system 21, and an emission of measurement light based on a predetermined emission direction. An emission angle deflecting member that moves the holding member so as to change the angle, an actuator that generates a driving force, and a member that transmits the driving force to the emission angle deflecting member. The optical axis adjustment mechanism 21A can move the optical axis of the OCT system 20 toward the center of the pupil of the eye E by the above mechanism.

  The optical axis adjusting mechanism 21A is configured such that the optical axis of the illumination system 10 (for example, the center of the illumination light beam) and the optical axis of the OCT system 20 (for example, the center of the measurement light beam) are the deflecting member 40 (in the case of FIG. The optical axis of the illumination system 10 and the optical axis of the OCT system 20 are relatively moved so as to be arranged at different positions on the reflection surfaces 40a and 40b). As a result, the optical path coupling member 30 non-coaxially couples the optical path of the OCT system 20 to the optical path of the illumination system 10.

  4A and 4B are explanatory diagrams of the operation when observing the fundus of the eye E to be inspected. When observing the fundus of the eye E, the front lens 200 is inserted between the objective lens 70 and the eye E as shown in FIG. FIG. 4A schematically illustrates the pupils of the respective optical systems that have entered the pupil of the eye E when the measurement light is vignetted by the deflection member 40 (the epi-illumination mirror). FIG. 4B schematically illustrates the pupils of the respective optical systems that have entered the pupil of the eye E when the direction of the measurement light from the interference optical system 21 is changed by the optical axis adjustment mechanism 21A. In FIG. 4B, the same components as those in FIG.

  When observing the fundus of the eye E, the illumination pupil (image) of the illumination system 10 and the observation pupil of the observation system 50 are arranged in the pupil P of the eye E so that vignetting due to the iris R does not occur. For example, the illumination pupil L1 of the illumination light reflected by the reflection member 40b of the illumination light emitted by the illumination system 10, and the illumination by the illumination light reflected by the reflection member 40a of the illumination light emitted by the illumination system 10. The pupil L2, the observation pupil B1 of the left observation system 50L, and the observation pupil B2 of the right observation system 50R are arranged in the pupil P of the eye E as shown in FIG. Here, when the deflecting member 40 is constituted by an epi-illumination mirror having a complicated shape, if the OCT pupil of the OCT system 20 is further arranged on the pupil P, for example, the OCT pupil of the OCT system 20 overlaps the illumination pupil L1. C1 may be arranged, and OCT pupil C2 of OCT system 20 may be arranged so as to overlap illumination pupil L2. In this case, vignetting occurs in the measurement light of the OCT system 20 due to the deflection member 40 (the epi-illumination mirror).

  In this embodiment, when the direction of the measurement light emitted from the interference optical system 21 is changed by the optical axis adjustment mechanism 21A, the OCT pupil C3 of the OCT system 20 is arranged so as to overlap the illumination pupil L1, as shown in FIG. 4B. can do. Thus, the occurrence of vignetting of the measurement light by the deflecting member 40 can be suppressed, and the performance of the OCT system 20 can be sufficiently exhibited without limiting the range of the OCT scan.

  5A and 5B are explanatory diagrams of the operation when observing the fundus of the eye E, which is a small pupil. FIG. 5A schematically illustrates the pupils of the respective optical systems that have entered the pupil of the eye E when the measurement light is vignetted by the iris of the eye E, which is a small pupil. FIG. 5B schematically illustrates the pupils of the respective optical systems that have entered the pupil of the eye E when the direction of the measurement light from the interference optical system 21 is changed by the optical axis adjustment mechanism 21A. 5A and 5B, the same parts as those in FIGS. 4A and 4B are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  When the subject's eye E is a small pupil, the OCT pupil C3 of the OCT system 20 is arranged as shown in FIG. 5A, and vignetting may occur in the measurement light due to the iris R. Here, when the direction of the measurement light emitted from the interference optical system 21 is changed by the optical axis adjustment mechanism 21A, as shown in FIG. 5B, the OCT pupil C4 of the OCT system 20 overlaps the illumination pupil L1 within the pupil P. Can be arranged. As a result, the occurrence of vignetting of the measurement light due to the iris R can be suppressed, and the performance of the OCT system 20 can be sufficiently exhibited without limiting the range of the OCT scan. This is particularly effective when the pupil of the eye E is small during fundus observation of the eye E and the position adjustment of the apparatus is not sufficient.

  In this embodiment, the case where the optical axis adjusting mechanism 21A adjusts the optical axis of the OCT system 20 has been described, but the optical axis of the illumination system 10 is changed by changing the direction of the illumination light emitted from the illumination system 10. And the optical axis of the OCT system 20 may be relatively moved.

[Action / Effect]
The microscope for ophthalmologic surgery according to the embodiment may include an optical axis adjustment mechanism (for example, an optical axis adjustment mechanism 21A) for relatively moving the optical axis of the illumination system and the optical axis of the OCT system.

  According to such a configuration, it is possible to suppress the occurrence of vignetting of light in the OCT system due to the deflecting member and the iris of the eye to be inspected, and to sufficiently exhibit the performance of the OCT system without limiting the range of the OCT scan. It becomes possible.

  The optical axis adjustment mechanism emits the measurement light among the measurement light and the reference light obtained by splitting the light from the OCT light source, and returns the reference light and the return light of the measurement light from the eye to be examined. The optical axis of the illumination system and the optical axis of the OCT system may be moved relative to each other by changing the direction of measurement light emitted from an interference optical system that generates interference light by causing interference.

  According to such a configuration, it is possible to provide an ophthalmic surgery microscope capable of sufficiently exhibiting the performance of the OCT system with a relatively simple configuration.

<Third embodiment>
In the first embodiment or the second embodiment, the case where the optical path coupling member 30 is disposed between the stop 13 and the lens unit 14 has been described. However, the configuration of the microscope for ophthalmologic surgery according to the embodiment is not limited to this. Not something.

  In the third embodiment, the optical path coupling member 30 is disposed between the lens unit 14 and the objective lens 70. The optical axis of the illumination system and the optical axis of the OCT system are arranged coaxially.

  The configuration of the microscope for ophthalmologic surgery according to the third embodiment is the same as that of the first embodiment. Hereinafter, the third embodiment will be described focusing on differences from the first embodiment.

  FIG. 6 shows an optical system of a microscope for ophthalmologic surgery according to the third embodiment. In FIG. 6, the same parts as those in FIG. 2 are denoted by the same reference numerals, and the description will be appropriately omitted.

  The main difference between the configuration of the microscope for ophthalmologic surgery 1b according to the third embodiment and the configuration of the microscope for ophthalmologic surgery 1 according to the first embodiment is that the optical path coupling member 30 includes the lens unit 14 and the objective lens 70 (deflection member 40). ) And an OCT lens 24b composed of two or more lenses instead of the OCT lens 24.

  The optical path coupling member 30 is arranged between the lens unit 14 and the objective lens 70 in the optical path of the illumination system 10 and couples the optical path of the OCT system 20 to the optical path of the illumination system 10. Specifically, the optical path coupling member 30 is disposed so as to face a lens provided at a position optically closest to the objective lens 70 among one or more lenses constituting the lens unit 14. In FIG. 6, the deflecting member 40 is disposed between the optical path coupling member 30 and the objective lens 70.

  In this embodiment, the measurement light of the OCT system 20 is applied to the eye E without passing through the lens unit 14. Therefore, for example, by providing the OCT lens 24b as shown in FIG. 6, it is possible to design in consideration of the transmission loss and the aberration of the measurement light. Therefore, according to this embodiment, compared to the first embodiment in which the lens unit 14 is shared by the illumination system 10 and the OCT system 20, the accuracy of the OCT inspection using the measurement light from the OCT system 20 can be improved. Will be possible.

  Further, in this embodiment, the optical path coupling member 30 is disposed on a parallel optical path where the illumination light from the illumination system 10 is converted into a parallel light flux. Therefore, the influence on the illumination system 10 due to the attachment and detachment of the ophthalmic surgery attachment 100b to and from the ophthalmic surgery microscope 1 (for example, a displacement of an optical element of the illumination system 10) can be reduced.

[Action / Effect]
The microscope for ophthalmic surgery according to the embodiment includes an objective lens, a stop irradiated with light from a light source, and a lens unit having one or more lenses that converts light passing through the stop into a parallel light beam. An illumination system for irradiating the eye to be inspected with the passed light through the objective lens, an observation system for observing the eye to be inspected illuminated by the illumination system via the objective lens, and And an optical path coupling member disposed between the lens unit and the objective lens for coupling the optical path of the OCT system to the optical path of the illumination system.

  According to such a configuration, in the microscope for ophthalmologic surgery used for surgery on the eye to be inspected, the diameter of the optical element through which the measurement light of the OCT system passes can be increased, so that the resolution of the measurement light of the OCT system is affected. It is possible to design a large numerical aperture and a large scan range using the measurement light. In addition, since the optical path of the OCT system is coupled to the optical path of the illumination system at a position between the lens unit and the objective lens, it is possible to improve the accuracy of the OCT inspection by designing only the OCT system. . In addition, since at least the optical elements such as the objective lens 70 are shared, the size of the apparatus can be reduced by reducing the number of optical elements. Further, as in the first embodiment, a wide range and high resolution OCT inspection can be performed.

  Further, the attachment for ophthalmologic surgery according to the embodiment includes an objective lens, a diaphragm irradiated with light from a light source, and a lens unit having one or more lenses that converts light passing through the diaphragm into a parallel light beam. An illumination system that irradiates the eye to be inspected with light passing through the unit through an objective lens, and an ophthalmic surgical microscope including an observation system for observing the eye to be inspected illuminated by the illumination system through the objective lens The OCT is used for inspecting an eye to be inspected by an OCT through an objective lens. The attachment for ophthalmic surgery emits measurement light out of the measurement light and the reference light obtained by splitting the light from the OCT light source, and causes interference between the reference light and the return light of the measurement light from the eye to be examined. A collimator lens that converts the measurement light emitted from the interference optical system that generates light into a parallel light beam, an optical scanner that two-dimensionally deflects the measurement light that has been converted into a parallel light beam by the collimator lens, and a measurement that is deflected by the optical scanner Includes an OCT lens through which light passes, and an optical path coupling member for coupling the optical path of the measurement light passing through the OCT lens to the optical path of the illumination system, and when mounted on an ophthalmic surgical microscope, the optical path coupling member is It is arranged between the lens unit and the objective lens.

  According to such a configuration, the collimating lens, the optical scanner, the OCT lens, and the optical path coupling member can be modularized to provide an ophthalmic surgery attachment that can be easily attached to and detached from the ophthalmic surgery microscope. A relatively large physical space can be ensured between the lens unit and the objective lens. Accordingly, the microscope for ophthalmologic surgery can be switched to a device capable of OCT inspection without affecting the optical system such as the displacement and axis displacement of the lens unit.

<Fourth embodiment>
In the third embodiment, since the illumination optical path and the OCT optical path are coaxially coupled as in the first embodiment, vignetting occurs in the measurement light from the OCT system 20 and the like, and the OCT scan range is limited. In some cases, the performance of the OCT system 20 cannot be sufficiently exhibited.

  Thus, in the fourth embodiment, similarly to the third embodiment, the optical axis of the illumination system and the optical axis of the OCT system are arranged so as to be non-coaxial, as in the second embodiment. The optical axis of the illumination system and the optical axis of the OCT system may be fixed so as to be non-coaxial, or the optical axis may be adjusted by relatively moving both optical axes as in this embodiment. It may be.

  The configuration of the microscope for ophthalmologic surgery according to the fourth embodiment is the same as that of the third embodiment. Hereinafter, the fourth embodiment will be described focusing on differences from the third embodiment.

  FIG. 7 shows an optical system of a microscope for ophthalmologic surgery according to the fourth embodiment. 7, the same parts as those in FIG. 6 are denoted by the same reference numerals, and the description will be appropriately omitted.

  The configuration of the microscope for ophthalmologic surgery 1c according to the fourth embodiment is different from the configuration of the microscope for ophthalmologic surgery 1b according to the third embodiment in that it includes the same optical axis adjustment mechanism 21A as in the second embodiment. The OCT system 20c includes an interference optical system 21, an optical axis adjustment mechanism 21A, a collimator lens 22, a focus adjustment mechanism 22A, an optical scanner 23, and an OCT lens 24b. The ophthalmic surgery attachment 100c includes a collimator lens 22, a focus adjustment mechanism 22A, an optical scanner 23, an OCT lens 24b, and an optical path coupling member 30. The ophthalmic surgery attachment 100c may further include an interference optical system 21 and an optical axis adjustment mechanism 21A. The ophthalmic surgery attachment 100c may further include an OCT light source.

  The optical axis adjustment mechanism 21A relatively moves the optical axis of the illumination system 10 and the optical axis of the OCT system 20c. The optical axis adjustment mechanism 21A relatively moves the optical axis of the illumination system 10 and the optical axis of the OCT system 20c by changing the direction of the measurement light emitted from the interference optical system 21, for example. Since the optical axis adjusting mechanism 21A is the same as that of the second embodiment, a detailed description is omitted. The optical axis adjusting mechanism 21A may relatively move the optical axis of the illumination system 10 and the optical axis of the OCT system 20c by changing the direction of the illumination light emitted from the illumination system 10, for example. .

  8A and 8B are explanatory diagrams of the operation when observing the fundus of the eye E to be examined. FIG. 8A schematically illustrates a pupil of each optical system that has entered the pupil of the subject's eye E when vignetting occurs in the measurement light due to positional displacement. FIG. 8B schematically illustrates a pupil of each optical system that has entered the pupil of the eye E when the direction of the measurement light from the interference optical system 21 is changed by the optical axis adjustment mechanism 21A. In FIG. 8B, the same parts as those in FIG.

  For example, when the eye E is displaced from the optical axis of the objective lens 70, the OCT pupil C4 of the OCT system 20c is arranged as shown in FIG. 8A, and vignetting may occur in the measurement light. Here, when the direction of the measurement light emitted from the interference optical system 21 is changed by the optical axis adjustment mechanism 21A, as shown in FIG. 8B, the OCT pupil C5 of the OCT system 20c overlaps the illumination pupil L1 within the pupil P. Can be arranged. As a result, it is possible to suppress the occurrence of vignetting of the measurement light due to the displacement, and to sufficiently exhibit the performance of the OCT system 20c without limiting the range of the OCT scan.

  As described above, according to this embodiment, in addition to the effect of the third embodiment, it is possible to obtain the effect of adjusting the optical axis similarly to the second embodiment.

<Fifth embodiment>
In the fourth embodiment, the case where the optical axis of the OCT system is shifted with respect to the optical axis of the illumination system by changing the direction of the measurement light emitted from the interference optical system has been described. The configuration of the surgical microscope is not limited to this.

  In the fifth embodiment, the optical scanner 23 and the OCT lens 24b are integrally moved in parallel to shift the optical axis of the OCT system with respect to the optical axis of the illumination system.

  The configuration of the microscope for ophthalmologic surgery according to the fifth embodiment is the same as that of the third embodiment. Hereinafter, the fifth embodiment will be described focusing on differences from the third embodiment.

  FIG. 9 shows an optical system of a microscope for ophthalmologic surgery according to a fifth embodiment. In FIG. 9, the same portions as those in FIG. 6 are denoted by the same reference numerals, and the description will be appropriately omitted.

  The configuration of the ophthalmic surgery microscope 1d according to the fifth embodiment differs from the configuration of the ophthalmic surgery microscope 1b according to the third embodiment in that the optical scanner 23 and the OCT lens 24b are integrated as a scanner unit 25. And an optical axis adjusting mechanism 25A for moving the scanner unit 25 in parallel. The OCT system 20d includes an interference optical system 21, a collimator lens 22, a focus adjustment mechanism 22A, a scanner unit 25 including an optical scanner 23 and an OCT lens 24b, and an optical axis adjustment mechanism 25A. The ophthalmic surgery attachment 100d includes a collimator lens 22, a focus adjustment mechanism 22A, a scanner unit 25 including an optical scanner 23 and an OCT lens 24b, an optical axis adjustment mechanism 25A, and an optical path coupling member 30. The ophthalmic surgery attachment 100d may further include an interference optical system 21 and an optical axis adjustment mechanism 21A. The ophthalmic surgery attachment 100d may further include an OCT light source.

  The optical axis adjusting mechanism 25A moves the scanner unit 25 in parallel. For example, the optical axis adjustment mechanism 25A translates the scanner unit 25 in a third direction parallel to the optical axis of the illumination system 10 and in a fourth direction orthogonal to the third direction. Thereby, the optical axis of the illumination system 10 and the optical axis of the OCT system 20d are relatively moved so that the optical axis of the illumination system 10 and the optical axis of the OCT system 20d are arranged at different positions on the reflection surface of the deflecting member 40. Can be done. In the fifth embodiment, since the optical path coupling member 30 is disposed in a parallel optical path in which the illumination light is converted into a parallel light flux, the position of the scan plane in the eye E can be accurately determined without being affected by refraction by the lens unit 14. Can be adjusted. In addition, the optical axis can be shifted over a wide range as compared with the second and fourth embodiments.

[Action / Effect]
The microscope for ophthalmologic surgery according to the embodiment has an optical axis adjustment mechanism (for example, optical axis adjustment) for relatively moving the optical axis of an illumination system (for example, illumination system 10) and the optical axis of an OCT system (for example, OCT system 20d). Including the mechanism 25A), the optical path coupling member is disposed between the lens unit and the objective lens. The optical axis adjusting mechanism relatively moves the optical axis of the illumination system and the optical axis of the OCT system by changing the positions of the optical scanner and the OCT lens.

  According to such a configuration, since the optical path coupling member is disposed in the parallel optical path in which the illumination light is converted into a parallel light flux, the position of the scan plane in the eye to be inspected can be accurately determined without being affected by refraction by the lens unit. Can be adjusted. In addition, the occurrence of vignetting of light of the OCT system can be suppressed, and the performance of the OCT system can be sufficiently exhibited without limiting the range of the OCT scan.

<Sixth embodiment>
The configuration for shifting the optical axis of the OCT system with respect to the optical axis of the illumination system is not limited to the configuration of the fourth embodiment or the fifth embodiment.

  In the sixth embodiment, by providing a parallel plane plate between the optical scanner and the optical path coupling member, the plane of incidence of which can be arranged with an inclination with respect to the optical axis of the OCT system, the optical axis of the illumination system is reduced. The optical axis of the OCT system is shifted.

  The configuration of the microscope for ophthalmologic surgery according to the sixth embodiment is the same as that of the third embodiment. Hereinafter, the sixth embodiment will be described focusing on differences from the third embodiment.

  FIG. 10 shows an optical system of a microscope for ophthalmologic surgery according to the sixth embodiment. 10, the same parts as those in FIG. 6 are denoted by the same reference numerals, and the description will be appropriately omitted.

  The configuration of the microscope for ophthalmologic surgery 1e according to the sixth embodiment is different from the configuration of the microscope for ophthalmologic surgery 1b according to the third embodiment in that it can be inserted and removed between the optical scanner 23 and the optical path coupling member 30. This is the point that a parallel plane plate 26 and an optical axis adjusting mechanism 26A for moving the parallel plane plate 26 are provided. The OCT system 20e includes an interference optical system 21, a collimating lens 22, a focus adjustment mechanism 22A, an optical scanner 23, an OCT lens 24b, a plane parallel plate 26, and an optical axis adjustment mechanism 26A. The ophthalmic surgery attachment 100e includes a collimator lens 22, a focus adjustment mechanism 22A, an optical scanner 23, an OCT lens 24b, a parallel flat plate 26, an optical axis adjustment mechanism 26A, and an optical path coupling member 30. The ophthalmic surgery attachment 100e may further include an interference optical system 21 and an optical axis adjustment mechanism 21A. The ophthalmic surgery attachment 100e may further include an OCT light source.

  The parallel plane plate 26 is, for example, an optical element provided so that the incident surface and the exit surface are parallel to each other, and transmits the measurement light or its return light in the OCT system 20e. The plane-parallel plate 26 is configured to be insertable into and removable from the optical scanner 23 and the optical path coupling member 30. It is arranged in an inclined state with respect to the axis. In FIG. 10, the parallel flat plate 26 is configured to be insertable and removable between the OCT lens 24 b and the optical path coupling member 30.

  The optical axis adjusting mechanism 26A moves the parallel flat plate 26 so as to be inserted and removed at a position on the optical axis of the OCT system 20e between the OCT lens 24b and the optical path coupling member 30. Thereby, the light passing through the parallel plane plate 26 is refracted, and the light of the illumination system 10 is arranged such that the optical axis of the illumination system 10 and the optical axis of the OCT system 20 e are arranged at different positions on the reflection surface of the deflecting member 40. The axis and the optical axis of the OCT system 20e can be relatively moved. In the sixth embodiment, since the optical path coupling member 30 is disposed in a parallel optical path in which the illumination light is converted into a parallel light flux, the position of the scan plane in the eye E to be inspected can be changed stepwise without being affected by refraction by the lens unit 14. Can be adjusted.

  In a state in which the plane-parallel plate 26 is disposed at a position between the OCT lens 24b and the optical path coupling member 30, the direction of the incident surface of the plane-parallel plate 26 can be further changed by the optical axis adjusting mechanism 26A. Thus, the position of the scan plane in the eye E can be adjusted more finely. Further, the parallel plane plate 26 is fixed and arranged in advance between the OCT lens 24b and the optical path coupling member 30, and the direction of the incident surface of the parallel plane plate 26 can be changed by the optical axis adjusting mechanism 26A. Good.

[Action / Effect]
As described above, in the microscope for ophthalmologic surgery according to the embodiment, the incident surface is arranged to be inclined with respect to the optical axis of the OCT system (for example, the OCT system 20e), and can be inserted and removed between the optical scanner and the optical path coupling member. A parallel plane plate (for example, parallel plane plate 26), and an optical axis adjusting mechanism (for example, optical axis adjusting mechanism 26A) for inserting and removing the parallel plane plate at a position between the optical scanner and the optical path coupling member. The optical path coupling member is disposed between the lens unit and the objective lens, and the optical axis adjustment mechanism is configured to insert and remove the parallel plane plate at a position between the optical scanner and the optical path coupling member to thereby control the illumination system. The optical axis and the optical axis of the OCT system are relatively moved.

  Further, the microscope for ophthalmologic surgery according to the embodiment is arranged between an optical scanner and an optical path coupling member, and is configured such that the direction of the incident surface with respect to the optical axis of the OCT system can be changed (for example, a parallel flat plate). A face plate 26) and an optical axis adjusting mechanism (for example, an optical axis adjusting mechanism 26A) for changing the direction of the incident surface, wherein the optical path coupling member is disposed between the lens unit and the objective lens, and the optical axis adjusting mechanism is provided. Moves the optical axis of the illumination system relative to the optical axis of the OCT system by changing the direction of the incident surface.

  According to any one of the above configurations, since the optical path coupling member is disposed in the parallel optical path in which the illumination light is converted into a parallel light beam, the position of the scan plane in the eye to be inspected can be raised without being affected by refraction by the lens unit. Can be adjusted to accuracy. In addition, the occurrence of vignetting of the OCT light can be suppressed, and the OCT performance can be sufficiently exhibited without limiting the range of the OCT scan.

<Seventh embodiment>
In the microscope for ophthalmic surgery having the above-described optical axis adjustment mechanism, by providing a beam splitter disposed on the observation optical axis on at least a part of the deflecting member 40, the optical axis of the OCT system and the observation optical axis are coaxial. And the non-coaxial state where the optical axis of the OCT system and the observation optical axis are non-coaxial.

  The configuration of the microscope for ophthalmologic surgery according to the seventh embodiment is the same as that of the sixth embodiment. Hereinafter, the seventh embodiment will be described focusing on differences from the sixth embodiment.

  FIG. 11 shows an optical system of a microscope for ophthalmologic surgery according to a seventh embodiment. 11, the same parts as those in FIG. 10 are denoted by the same reference numerals, and the description will be appropriately omitted.

  The configuration of the microscope for ophthalmologic surgery 1f according to the seventh embodiment is different from the configuration of the microscope for ophthalmologic surgery 1e according to the sixth embodiment in that a deflection member 40A is provided instead of the deflection member 40. The deflecting member 40A includes a reflecting member 40f and a beam splitter 40g. The beam splitter 40g is arranged on the observation optical axis (the left observation optical axis 50La or the right observation optical axis 50Ra) of the observation system 50, and couples the optical path of the illumination system 10 with the optical path of the observation system 50. The deflecting member 40A may connect the optical path of the illumination system 10 and the optical path of the observation system 50 with another optical element such as a dichroic mirror or a half mirror, instead of the beam splitter 40g.

  In such a configuration, by adjusting the optical axis of the OCT system 20e with respect to the optical axis of the illumination system 10 by the optical axis adjusting mechanism 26A, the optical axis of the OCT system 20e is adjusted coaxially with the observation optical axis. And can be adjusted non-coaxially.

  12A and 12B are explanatory diagrams of the operation when observing the fundus of the eye E to be inspected. FIG. 12A schematically illustrates a pupil of each optical system that has entered the pupil of the eye E when the optical axis of the OCT system 20 e is adjusted to be coaxial with the observation optical axis. FIG. 12B schematically illustrates a pupil of each optical system that has entered the pupil of the eye E when the optical axis of the OCT system 20 e is adjusted to be non-coaxial with the observation optical axis. In FIG. 12B, the same parts as those in FIG.

  When the optical axis of the OCT system 20e is adjusted to be coaxial with the observation optical axis, the OCT pupil C6 of the OCT system 20e is arranged so as to overlap the observation pupil B1 of the left observation system 50L as shown in FIG. 12A. Is done. At this time, the OCT inspection can be performed under conditions close to those observed by the observation system 50.

  On the other hand, when the optical axis of the OCT system 20e is adjusted so as to be non-coaxial with the observation optical axis, the OCT pupil C7 of the OCT system 20e becomes, as shown in FIG. 12B, the observation pupil B1 of the left observation system 50L. And the observation pupil B2 of the right observation system 50R. At this time, the occurrence of vignetting as described above can be suppressed, and the performance of the OCT system 20e can be sufficiently exhibited without limiting the range of the OCT scan.

[Other Modifications]
The embodiment described above is only an example for embodying the present invention. Those who intend to carry out the present invention can make arbitrary modifications, omissions, additions, etc. within the scope of the present invention.

  The configurations described in the first to seventh embodiments can be arbitrarily combined. For example, in a system to which two or more of the first to seventh embodiments can be applied, a desired embodiment of the two or more embodiments can be selectively applied by switching operation modes. It is possible to

1, 1a, 1b, 1c, 1d, 1e, 1f Ophthalmic surgery microscope 10 Illumination system 11 Illumination light source 12 Condensing lens 13 Aperture 14 Lens unit 20, 20a, 20c, 20d, 20e OCT system 21 Interference optical system 21A, 25A , 26A Optical axis adjusting mechanism 22 Collimating lens 22A Focus adjusting mechanism 23 Optical scanner 24, 24b OCT lens 25 Scanner unit 26 Parallel plane plate 30 Optical path coupling member 40, 40A Deflection members 40a, 40b, 40f Reflection member 40g Beam splitter 70 Objective lens 100, 100a, 100b, 100c, 100d, 100e Attachment 200 for Ophthalmic Surgery Head Lens E Eye to be Examined

Claims (5)

An objective lens,
An objective lens that includes a stop irradiated with light including visible light from an illumination light source, and a lens unit having at least one lens that converts light passing through the stop into a parallel light beam; An illumination system for irradiating the eye to be examined through
An observation system for observing the subject's eye illuminated by the illumination system via the objective lens,
Among the measurement light and the reference light obtained by dividing the light from the OCT light source, the measurement light is emitted, and the interference light is generated by causing the reference light and the return light of the measurement light from the eye to be examined to interfere with each other. An OCT system to generate ,
An ophthalmic surgical attachment detachable from the ophthalmic surgical microscope,
Including
The eye surgery attachment,
A collimating lens that converts the measurement light into a parallel light beam;
An optical scanner that two-dimensionally deflects the measurement light converted into a parallel light flux by the collimator lens;
An OCT lens through which the measurement light deflected by the optical scanner passes;
An optical path coupling member for coupling an optical path of the measurement light having passed through the OCT lens to an optical path of the illumination system;
Including
The ophthalmic surgery microscope, wherein the optical path coupling member is disposed between the diaphragm and the lens unit when the microscope is mounted on the ophthalmic surgery microscope. The microscope for ophthalmologic surgery according to claim 1, further comprising a focus adjustment mechanism that moves the collimating lens along the optical axis of the OCT system. The illumination system of the optical axis and the OCT system of the ophthalmologic surgical microscope according to claim 1 or claim 2, characterized in that it comprises an optical axis adjustment mechanism for relatively moving the optical axis. The microscope for ophthalmologic surgery according to claim 3, wherein the optical axis adjustment mechanism relatively moves the optical axis of the illumination system and the optical axis of the OCT system by changing the direction of the measurement light. . An objective lens,
An objective lens that includes a stop irradiated with light including visible light from an illumination light source, and a lens unit having at least one lens that converts light passing through the stop into a parallel light beam; An illumination system for irradiating the eye to be examined through
And an observation system for observing the subject's eye illuminated by the illumination system via the objective lens.The microscope is configured to be detachable from an ophthalmic surgical microscope, and the subject's eye is subjected to optical coherence tomography. An ophthalmic surgical attachment for inspection via an objective lens,
Among the measurement light and the reference light obtained by dividing the light from the OCT light source, the measurement light is emitted, and the interference light is generated by causing the reference light and the return light of the measurement light from the eye to be examined to interfere with each other. A collimating lens that converts the measurement light emitted from the generated interference optical system into a parallel light beam;
An optical scanner that two-dimensionally deflects the measurement light converted into a parallel light flux by the collimator lens;
An OCT lens through which the measurement light deflected by the optical scanner passes;
An optical path coupling member for coupling an optical path of the measurement light that has passed through the OCT lens to an optical path of the illumination system,
An ophthalmic surgery attachment, wherein the optical path coupling member is disposed between the stop and the lens unit when mounted on the ophthalmic surgery microscope.

Images