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WO2019066027A1 - Dispositif de lentille frontale et microscope ophtalmique - Google Patents

Dispositif de lentille frontale et microscope ophtalmique Download PDF

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Publication number
WO2019066027A1
WO2019066027A1 PCT/JP2018/036432 JP2018036432W WO2019066027A1 WO 2019066027 A1 WO2019066027 A1 WO 2019066027A1 JP 2018036432 W JP2018036432 W JP 2018036432W WO 2019066027 A1 WO2019066027 A1 WO 2019066027A1
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WIPO (PCT)
Prior art keywords
lens
front lens
optical system
eye
observation optical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/JP2018/036432
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English (en)
Japanese (ja)
Inventor
山田　和広
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Topcon Corp
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Topcon Corp
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Priority claimed from JP2017217520A external-priority patent/JP7002817B2/ja
Application filed by Topcon Corp filed Critical Topcon Corp
Publication of WO2019066027A1 publication Critical patent/WO2019066027A1/fr
Anticipated expiration legal-status Critical
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/13—Ophthalmic microscopes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes

Definitions

  • the present invention relates to an ophthalmic microscope for magnifying and observing an eye to be examined, and a pre-lens apparatus for inserting and removing a pre-lens between an objective lens of the ophthalmic microscope and the eye to be examined.
  • the invention relates in particular to a front lens arrangement with a mechanism by which two or more front lenses can be interchanged, and to an ophthalmic microscope having such a front lens arrangement.
  • An ophthalmologic microscope is a medical or examination instrument capable of magnifying and observing a subject's eye to be examined by an observation optical system including a lens or the like.
  • Some ophthalmologic microscopes have a function of observing an anterior segment (for example, cornea, anterior capsule, sclera etc.) and a function for observing a posterior segment (for example, retina).
  • the anterior lens can be inserted into and removed from the optical path of the observation optical system between the objective lens and the subject's eye to switch between anterior segment observation and posterior segment observation.
  • the anterior segment of the eye 11 When observing the anterior segment, as shown in FIG. 12A, the anterior segment of the eye 11 is positioned at the focal position (front focal position) U0 that is closer to the subject eye 11 than the objective lens 13 of the observation optical system.
  • the distance H2 between the objective lens 13 and the eye 11 to be examined is set.
  • the distance H2 'between the objective lens 13 and the eye 11 to be examined is set longer, and between the front focal position U0 and the eye 11 to be examined.
  • the front lens 6 is placed.
  • the front lens 6 guides the light of the observation optical system as parallel light to the lens 11b of the eye to be examined, and is arranged to focus on the retina 11a through the lens 11b. Assuming that the focal length of the front lens 6 is F2, typically, H2 ' ⁇ F1 + 2 ⁇ F2.
  • pre-lens devices that support the pre-lens in the optical path in a removable manner.
  • a pre-lens system capable of inserting and removing the pre-lens in the light path of the observation optical system by holding the pre-lens by the holding arm and pivoting the holding arm about the pivot axis. It has been developed (Patent Documents 1 [0027] to [0032]).
  • the holding arm can be further provided with a loupe holding mechanism, and the loupe can be inserted into and removed from the optical path of the observation optical system to adjust the focal position in the eye to be examined (Patent Documents 1 [0071] to [0077] ).
  • a head of a revolver system in which two head lenses are attached via a lens holder bent to a lens receiving portion that rotates about a rotation axis tilted with respect to the optical axis of the observation optical system of the ophthalmic microscope Lens devices have been developed.
  • This front lens device can switch two front lenses on the light path of the observation optical system (Patent Document 2 [0120]).
  • the number of pre-lenses held is usually one, at most two, and in order to use pre-lenses having different refractive powers, the pre-lenses are manually operated. It was something that needed to be replaced.
  • the front lens When the lens is mounted, there is a risk that the front lens not in use may enter the observation field of view of the ophthalmic microscope. Further, in the revolver-type front lens system described in Patent Document 2, it is necessary to perform all the front lens replacement manually, and it is easy to accurately set the front lens on the optical axis of the observation optical system. In particular, when it is desired to alternately view the anterior segment (for example, cornea, anterior capsule, sclera, etc.) and the posterior segment (for example, retina), time loss occurs during the operation.
  • the anterior segment for example, cornea, anterior capsule, sclera, etc.
  • the posterior segment for example, retina
  • the inventors of the present application have conducted intensive studies, and as a result, the front lens support attached with at least two front lenses is substantially parallel to the optical axis of the observation optical system of the ophthalmic microscope.
  • the front lens can be prevented from coming into contact with the hand of the surgeon, assistant or the like, or from entering the visual field of the ophthalmologic microscope.
  • the inventors have found that it is easy to position the pre-lens accurately on the optical axis of the system, and have completed the present invention.
  • a first aspect of the present invention relates to a front end lens apparatus for use in an ophthalmic microscope having an observation optical system for observing an eye to be examined.
  • a front lens support that rotates around a rotation axis substantially parallel to the optical axis of the observation optical system, a drive unit that rotates the front lens support, and at least two mounted on the front lens support With a front lens
  • the present invention relates to a front lens apparatus characterized in that the front lens inserted in the light path of the observation optical system can be replaced by rotating the front lens support.
  • the front lens apparatus of the first invention preferably, three or four front lenses are mounted on the front lens support so as to be rotationally symmetric.
  • the pre-lenses be attached to the lens support such that the distances to the objective lens of the ophthalmic microscope are different.
  • the front lens be attached to the eye to be examined as the focal length decreases.
  • the position of the observation optical system in the optical axis direction is shifted by the difference in the focal length of the front lenses, It is preferable to arrange the front lens.
  • a second invention relates to an ophthalmic microscope having an observation optical system for observing an eye to be examined, the ophthalmic microscope having any of the above-mentioned front lens devices.
  • the ophthalmic microscope of the second invention it is insertable into and removable from the optical axis of the observation optical system, and is used to adjust the focal position closer to the eye to be examined than the objective lens of the observation optical system. It is preferable to have an objective auxiliary lens.
  • the objective auxiliary lens is preferably a lens having a negative power.
  • the front lens apparatus of the first invention and the ophthalmic microscope of the second invention since the front lens support rotates about a rotation axis substantially parallel to the optical axis of the observation optical system, the observation optical system
  • the front lens separated from the optical path of the optical system can be separated from the optical path of the observation optical system with a sufficient distance.
  • the front lens is effectively prevented from coming into contact with the working hands of the surgeon and the assistant and from entering the observation field of view of the ophthalmologic microscope, and the two or more fronts
  • the stationary lens can be arranged to be interchangeable.
  • the front lens support is rotated not manually but by the drive unit, it becomes easy to accurately position the front lens on the optical axis of the observation optical system.
  • FIG. 1 is a perspective view schematically showing a front lens apparatus and an ophthalmic microscope of a first embodiment of the present invention. It is a top view which shows typically the front lens support body used for 1st Embodiment.
  • FIG. 2 (A) shows a plan view of a front lens support identical to the front lens support shown in FIG. 1, and FIG. 2 (B) shows a front lens support that holds two front lenses. A plan view of the body is shown, (C) is a plan view of a front lens support holding four front lenses, and (D) is a plane of the front lens support holding six front lenses.
  • Figure shows It is a perspective view which shows typically the front lens apparatus and the ophthalmic microscope of the 2nd Embodiment of this invention.
  • FIG. 4 (A) shows the positional relationship when performing anterior segment observation
  • FIG. 4 (B) shows the positional relationship when performing posterior segment observation
  • FIG. 4 (C) is the objective auxiliary lens Show the positional relationship when performing anterior segment observation using.
  • FIG. 5 (A) shows the positional relationship in the case of using a front lens having a refractive power of D
  • FIG. 5 (B) shows the positional relationship in the case of using a front lens having a refractive power of D
  • FIG. 5 (A) shows the positional relationship in the case of using a front lens having a refractive power of D
  • FIG. 5 (B) shows the positional relationship in the case of using a front lens having a refractive power of D ′ ′.
  • FIG. 5C shows a positional relationship in the case of using a front lens with an optical power of D ′ ′ and an objective auxiliary lens.
  • FIG. 8 (A) shows the arrangement of the objective auxiliary lens in the ophthalmic microscope of the third embodiment of the present invention
  • FIG. 8 (B) shows the objective auxiliary lens on the opposite side of the objective eye to the eye It shows the arrangement when it is provided.
  • the ophthalmic microscope of the 3rd Embodiment of this invention WHEREIN It is a front view which shows typically the structure of the optical system at the time of observing a back eye part.
  • FIG. 11 (A) shows the arrangement of the objective auxiliary lens in the ophthalmic microscope of the third embodiment of the present invention
  • FIG. 11 (B) shows the objective auxiliary lens on the opposite side to the eye side of the objective lens. It shows the arrangement when it is provided.
  • FIG. 11 (B) shows the arrangement when it is provided.
  • the pre-lens device of the present invention relates to a pre-lens device for use in an ophthalmic microscope having an observation optical system for observing an eye to be examined.
  • a front lens support that rotates about an axis of rotation substantially parallel to the optical axis of the observation optical system; and at least two front lenses attached to the front lens support; By rotating the front lens support, it is possible to replace the front lens inserted in the light path of the observation optical system.
  • the pre-lens support rotates about a rotation axis substantially parallel to the optical axis of the observation optical system. Therefore, the front lens separated from the light path of the observation optical system can be separated from the light path of the observation optical system by securing a sufficient distance. As a result, it becomes possible to effectively suppress that the front lens comes in contact with the operating hand of the surgeon and the assistant or the like, or that it enters the observation field of the ophthalmic microscope. And, the pre-lens apparatus of the present invention can replace two or more pre-lenses by attaching at least two pre-lenses to the pre-lens support. Furthermore, since the front lens device of the present invention performs rotation of the front lens support by means of the drive unit instead of manually, it is easy to accurately position the front lens on the optical axis of the observation optical system .
  • rotation axis of the front lens support is "substantially parallel to the optical axis of the observation optical system” means that the rotational axis is completely parallel to the optical axis of the observation optical system, or within a range of 15 ° It means that it is approximately parallel inside.
  • the axis of rotation of the front lens support is either completely parallel to the axis of rotation of the viewing optics or substantially parallel within a 5 ° inclination angle.
  • the term "rotational axis” may be a shaft-shaped member serving as a rotation axis, but in reality, even if there is no shaft-shaped member, an idealized axis serving as the center of rotation exists do it.
  • FIG. 1 shows a perspective view of a front lens apparatus and an ophthalmic microscope of a first embodiment of the present invention.
  • FIG. 2 shows a plan view of a front lens support used in the front lens apparatus of the first embodiment of the present invention.
  • the front lens unit 1 is mounted so as to be rotationally symmetrical to a rotating arm 4, a front lens support 5 rotating around the rotating arm 4, and the front lens support 5.
  • the three front lenses 601, 602, and 603 are provided.
  • the rotary arm 4 coincides with the rotation axis of the front lens support 5.
  • the front lens 601 is a convex lens with a refractive power of 40 D (diopter), the front lens 602 is a convex lens with a refractive power of 80 D, and the front lens 603 is a convex lens with a refractive power of 120 D.
  • the rotation arm 4 can be rotated by the drive motor 1001, and can replace the front lens inserted in the light path of the observation optical system.
  • FIG. 1 shows a front lens 601 inserted in the light path of the observation optical system.
  • an optical axis O-300 of the observation optical system passing through the center of the optical path of the observation optical system is indicated by a dotted line.
  • the optical path of the observation optical system passes through the front lens and enters the eye 11 to be examined.
  • the front lens support 5 rotates about a rotating arm 4 substantially parallel to the optical axis O-300 of the observation optical system. That is, the rotation axis of the front lens support 5 is substantially parallel to the optical axis O-300 of the observation optical system. For this reason, as shown in FIG.
  • the front lenses 602 and 603 which are not used are sufficiently separated from the optical axis O-300 of the observation optical system, there is no possibility that they will be in the observation field of the ophthalmologic microscope.
  • the front lens support 5 can be formed in a compact shape, there is little risk of touching hands such as a surgeon or an assistant working near the eye to be examined.
  • the front lens support 5 is rotated by the drive motor 1001, it is easy to accurately position the front lenses 601, 602, and 603 on the optical axis O-300 of the observation optical system.
  • the rotation axis of the front lens support 5 is substantially parallel to the optical axis O-300 of the observation optical system, as shown in FIG. It becomes possible to arrange the drive motor 1001 which becomes a drive part which rotates a rotating shaft near the lens barrel 14 distant from the work space.
  • the rotary arm 4 is rotatably held by a support arm 1002.
  • the support arm 1002 is coupled to the support bracket 1004 so as to be pivotable about a pivot 1003. Therefore, by manually operating the pivot lever 1005, the support arm 1002 can be pivoted.
  • the front lens support 5 can be retracted from the light path of the observation optical system.
  • the retracted front lens support 5 can be reinserted into the light path of the observation optical system by the operation of the turning lever 1005.
  • the support bracket 1004 is connected to the front lens position adjusting device 1007 via a connecting arm 1006.
  • the front lens position adjusting device 1007 controls the upper and lower positions of the front lens by driving the connecting arm 1006 up and down in the optical axis direction of the observation optical system.
  • the front lens unit 1 includes the rotary arm 4, the front lens support 5, the front lenses 601, 602, and 603, the drive motor 1001, the support arm 1002, the pivot 1003, the support bracket 1004, and the pivot lever. It consists of 1005, a connecting arm 1006, and a front lens position adjusting device 1007.
  • the front lens device 1 is attached to the ophthalmic microscope main body 12.
  • the front lens unit 1 can also be attached via an attachment unit (not shown) so as to be easily detachable from the ophthalmic microscope main body 12.
  • the ophthalmic microscope 2 is configured to include an ophthalmic microscope main body 12 and a front lens device 1.
  • the ophthalmic microscope main body 12 has a lens barrel 14 that accommodates an optical element such as a lens of an observation optical system, and the objective lens 13 is installed on the most eyelid 11 side of the lens barrel 14.
  • the front lens positioning device 1007 can be used to adjust the distance between the front lens and the objective lens 13 according to the focal length of the front lens inserted in the light path of the observation optical system. .
  • the image of the eye to be examined is inverted to be a reverse image, and a lens unit for returning this to a normal image is provided in the inverter unit 15.
  • the optical system of the lens unit provided in the inverter unit 15 can use, for example, the one disclosed in Japanese Patent Publication No. 7-48091.
  • the lens unit can be inserted into or removed from the optical path in the lens barrel by manually operating the switching lever 16 in conjunction with the insertion and removal of the front lens support 5 by the operation of the pivot lever 1005.
  • the lens unit can be automatically inserted and removed from the optical path in the lens barrel by operating an actuator (not shown) in conjunction with the insertion and removal of the front lens support 5 by the pivot lever 1005.
  • the front lens apparatus of the first embodiment for example, when the surgeon observes the inside of the eye with the ophthalmic microscope 2 using the front lens 601 having a refractive power of 40 D, When the image of the subject's eye is blurred due to a lack of fit, the front lens can be replaced.
  • the surgeon uses a foot switch (not shown) to drive the drive motor 1001 to rotate the rotary arm 4 and the front lens support 5 to insert the front lens into the optical path of the observation optical system.
  • the surgeon can easily and quickly replace the front lens without using the power of an assistant or the like, and the operability of the operation can be improved.
  • front lens support 5 can be attached to and removed from the tip of the rotary arm 4, depending on the type of surgery and treatment, different types of front lens supports and sets of front lenses attached thereto can be used properly. be able to.
  • FIG. 2 is a plan view schematically showing a front lens support used in the first embodiment.
  • the front lens supports shown in FIGS. 2A to 2D are used by being attached to the front lens device according to the type of surgery and treatment.
  • FIG. 2A shows a plan view of a front lens support identical to the front lens support shown in FIG.
  • the front lens support 5 holds three front lenses 601, 602, and 603 so as to be rotationally symmetric (three-fold symmetry) with respect to the rotation axis 4.
  • the front lens support 5 and the three front lenses are integrated.
  • the front lens support 5 can be connected to the rotation arm at the portion of the rotation shaft 4 by screwing or the like. By rotating the front lens support 5 about the rotation axis 4, it is possible to replace the front lens that transmits the light path of the observation optical system.
  • FIG. 2B shows a plan view of another pre-lens support.
  • the front lens support comprises front lens support frames 511 and 512 and a joint portion 521.
  • the front lens support frames 511 and 512 have an annular frame portion for holding the front lenses 601 and 602, respectively, and a rod-like shaft portion.
  • the joint portion 521 has two connections through which the shaft portion of the front lens support frame can be inserted, and connects the two front lens support frames so as to be rotationally symmetric (two-fold symmetry) It is possible.
  • any two pre-lenses of different refractive powers can be coupled to the joint 521 to obtain a pre-lens support with a set of arbitrary pre-lenses.
  • 2B is a portion to be a rotation axis of the front lens support, and in this portion, it is possible to connect with the rotation arm by screwing or the like.
  • FIG. 2C shows a plan view of another one of the front lens supports.
  • the front lens support comprises front lens support frames 511, 512, 513, 514 and a joint 522.
  • the front lens support frames 511, 512, 513, 514 have an annular frame portion for holding the front lenses 601, 602, 603, 604, respectively, and a rod-like shaft portion.
  • the joint portion 522 has four connections to which the shaft portion of the front lens support frame can be inserted, and can connect four front lens support frames.
  • FIG. 2 (D) shows a plan view of another pre-lens support.
  • the front lens support 5 is shaped like a regular hexagon as a base, and has a frame that holds the front lenses 601 to 606 at the respective sides of the regular hexagon. Thereby, six front lenses can be arranged to be rotationally symmetric (six-fold symmetry) with respect to the rotation axis 4.
  • the front lens support 5 can be connected to the rotation arm at the portion of the rotation shaft 4 by screwing or the like. By rotating the front lens support 5 about the rotation axis 4, it is possible to replace the front lens that transmits the light path of the observation optical system.
  • the “pre-lens support” may have any shape as long as it can hold two or more pre-lenses. It is preferable that the front lens support has an approximately equal distance from the rotation axis to each front lens.
  • the front lens support may have a three-dimensional shape as well as a planar shape.
  • the front lens support is preferably shaped to hold each front lens in rotational symmetry.
  • By arranging the front lenses in rotational symmetry it is possible to secure the same work space regardless of which front lens is on the optical path of the observation optical system.
  • a regular n-gon is used as a base of the shape of the front lens support, By providing a frame for holding the front lens on the side, it is possible to arrange the front lens in rotational symmetry.
  • the front lens can be arranged to be n-fold symmetric with respect to the rotation axis.
  • rotational symmetry can be achieved by providing a frame that holds the front lens on a part of the regular n-gon, for example, three sides of every six sides of a regular hexagon.
  • a frame for holding the front lens it is possible to arrange three front lenses so as to be three-fold symmetric with respect to the rotation axis.
  • the front lens support holds at least two or more front lenses, usually three to six front lenses. In order to make the front lens support compact and to ensure a large working space, it is preferable that the front lens support hold three or four front lenses in rotational symmetry.
  • the front lens support can hold each front lens in such a way that each front lens has a different distance from the objective lens of the ophthalmic microscope.
  • the front lenses have different refractive powers and different focal lengths.
  • the focal length can be determined as the reciprocal of the refractive power (diopter).
  • the front lenses it is preferable to position the front lenses by shifting the position in the optical axis direction of the observation optical system by the difference in the focal length of the front lenses.
  • the respective front lenses are arranged such that their distances to the objective lens are different from each other will be described in detail with reference to the drawings.
  • FIG. 3 is a perspective view schematically showing a front lens apparatus and an ophthalmic microscope according to a second embodiment of the present invention.
  • the front lens unit 1 includes a rotating arm 4, a front lens support 5 rotating around the rotating arm 4, and a front lens so as to be rotationally symmetrical with respect to the rotation axis. It has three front lenses 601, 602, 603 attached to the support 5. The three front lenses 601, 602, and 603 are held by the front lens support 5 so that the distances to the objective lens 13 are different.
  • the rotation arm 4 can be rotated by the drive motor 1001, and can replace the front lens inserted in the light path of the observation optical system.
  • the rotary arm 4 coincides with the rotation axis of the front lens support 5.
  • the front lens 601 is a convex lens having a refractive power of 40 D
  • the front lens 602 is a convex lens having a refractive power of 80 D
  • the front lens 603 is a convex lens having a refractive power of 120 D.
  • the focal length is longest since the pre-lens 601 has the smallest refractive power.
  • the front lens 601 is most held on the objective lens 13 side such that the distance to the subject eye 11 is close to the focal length of the front lens 601.
  • the front lens 603 has the shortest focal length because it has the largest refractive power.
  • the front lens 603 is held most at the eye 11 side so that the distance to the eye 11 to be examined is close to the focal length of the front lens 603.
  • the front lens 602 is held at a position between the front lens 601 and the front lens 603. Therefore, even when the front lens support 5 is rotated and the front lens is replaced, the distance between the front lens and the eye to be examined can be maintained close to the focal length of the front lens.
  • the position adjustment of the front lens only requires fine adjustment. Fine adjustment of the position of the front lens can be performed by the front lens position adjusting device 1007.
  • the ophthalmic microscope of the present invention is an ophthalmic microscope having an observation optical system for observing an eye to be examined, and in addition to the ophthalmic microscope main body, the above-mentioned 1. It has the pre-lens apparatus described in these.
  • the term "ophthalmic microscope” refers to a medical or examination instrument having an observation optical system including an optical element capable of magnifying and observing an eye to be examined, not only for humans but also for animals. Including the “ophthalmic microscope” includes, but is not limited to, for example, a fundus camera, a slit lamp, a microscope for ophthalmologic surgery, and the like.
  • the ophthalmic microscope preferably further includes an illumination optical system, and the return light reflected / scattered from the eye illuminated by the illumination optical system can be magnified and observed by the observation optical system.
  • the illumination optical system is configured to include an optical element for illuminating the subject's eye.
  • the illumination optical system may further include a light source, but may also guide natural light to the eye to be examined.
  • the “observation optical system” in the present invention can be configured to be divided into a left-eye observation optical system and a right-eye observation optical system, and when parallax is generated in the images obtained by the left and right observation optical systems. Can also be observed stereoscopically by binocular vision.
  • the “observation optical system” in the present invention may be one in which the observer can directly observe the eye to be examined through an eyepiece lens or the like, or can be observed by receiving light with an imaging device or the like to form an image Alternatively, it may have both functions.
  • the pre-lens apparatus of the present invention is an apparatus capable of interchangeably inserting and removing at least two pre-lenses between an objective lens and an eye to be examined.
  • the ophthalmic microscope main body and the front lens device may be integrated, or the front lens device may be easily removable from the ophthalmic microscope main body via the attachment portion.
  • FIG. 4 is a schematic view showing the relationship between the distance between the objective lens and the eye to be examined when the anterior segment observation and the posterior segment observation are switched by inserting and removing the front lens.
  • the anterior segment of the subject eye 11 is located at the focal point position (front focal point position) U0 closer to the subject eye 11 than the objective lens 13 of the observation optical system.
  • the front lens 6 is placed.
  • the front lens 6 guides the light of the observation optical system as parallel light to the lens 11b of the eye to be examined, and is arranged to focus on the retina 11a through the lens 11b. Assuming that the focal length of the front lens 6 is F2, typically, H2 ' ⁇ F1 + 2 ⁇ F2.
  • the focal length is obtained by separating the front lens from the optical path and inserting the objective auxiliary lens 17 formed of a concave lens in the optical path. To match H2 '. Then, when performing the posterior eye observation, as shown in FIG. 4B, the objective auxiliary lens 17 is separated from the light path, and the front lens 6 is inserted into the light path.
  • the distance between the objective lens 13 and the eye 11 to be examined becomes H2 'in any of the anterior eye observation and the posterior eye observation, and the ophthalmic microscope main body is vertically There is no need to move to
  • the objective auxiliary lens used to adjust the focal position on the side of the eye to be examined rather than the objective lens of the observation optical system.
  • the objective auxiliary lens is preferably a lens having negative power capable of increasing the focal length.
  • a lens having negative power is usually a lens also called a concave lens.
  • FIG. 5 is a schematic view showing the relationship of the distance between the objective lens and the eye to be examined when the refractive powers of the front lens are different.
  • FIG. 5A is a view showing a state in which the front lens 6 is inserted in the optical path for the rear eye observation, and has the same positional relationship as FIG. 4B.
  • the distance between the objective lens 13 and the front lens 6 is indicated by H1 '.
  • the refractive power of the front lens 6 is D.
  • FIG. 5 (B) shows a state in which the front lens 6 is replaced with a front lens 6 ′ ′ having a larger refractive power in the same rear eye observation.
  • the refractive power of the front lens 6 '' is D ''.
  • the focal length of the front lens 6, 6 ′ ′ is a length that can be obtained from the reciprocal of the refractive power of the lens, the focal length of the front lens 6, 6 ′ ′ in FIG.
  • the focal length F2 ′ ′ of the front lens 6 ′ ′ in B) is shorter.
  • the distances H1 ′ and H1 ′ ′ between the objective lens 13 and the front lenses 6 and 6 ′ ′ have short focal lengths (refractive In the case of FIG. 5 (B) using the front lens 6 '' with large power, it is necessary to make it shorter than the case of FIG. 5 (A).
  • the distances H2 'and H2''between the objective lens 13 and the subject's eye 11 are also better in the case of FIG. 5 (B) using the front lens 6''having a short focal length (large refractive power) , It is necessary to make it shorter than the case of FIG. 5 (A). Therefore, when replacing the front lens, it is necessary to adjust the distance between the objective lens and the front lens, and at the same time, move the ophthalmic microscope body up and down to move between the objective lens and the eye to be examined. You also need to adjust the distance of
  • the distance between the objective lens 13 and the front lens is adjusted to be H1 ′ when the front lens 6 is used, and to be H1 ′ ′ ′ when the front lens 6 ′ ′ is used.
  • H1 ′ ′ ′ when the front lens 6 ′ ′ is used.
  • the distance between the objective lens and the eye to be examined can be made constant by using the corresponding third objective auxiliary lens. can do. Therefore, in the ophthalmic microscope of the present invention, it is preferable to have at least three objective auxiliary lenses for adjusting the focal length when replacing at least three front lenses. Also, in the case of having n (n ⁇ 3) front lenses, it is preferable to have n or more objective auxiliary lenses. And, in the pre-lens apparatus, it is preferable to arrange each pre-lens by shifting the position of the observation optical system in the optical axis direction by the difference in the focal length of the pre-lens. In the following, an example of an embodiment of the inventive ophthalmic microscope using a front lens arrangement and an objective auxiliary lens will be described in detail with reference to the drawings.
  • FIG. 6 is a schematic side view of the ophthalmologic microscope 2 and FIG. 7 is a schematic front view of the same, showing the observation of the anterior segment (e.g. cornea, anterior capsule, sclera etc.) of the eye 11 to be examined.
  • FIG. 8A is a schematic view of an observation optical system 300 (an observation optical system in which an objective auxiliary lens is provided on the side of the eye to be examined of the objective lens) of the ophthalmic microscope of FIGS.
  • the ophthalmologic microscope 2 includes an illumination optical system 1800 (not shown in FIG. 7) in addition to the observation optical system 300.
  • the observation optical system 300 can observe an observation target (the eye 11 in FIGS. 6 and 7). As shown in FIG. 6, the illumination optical system 1800 can illuminate a portion to be observed of the eye 11 to be examined. In FIG. 6 and FIG. 7, the observation optical system has the front focal position U0 in front of the subject eye 11.
  • the observation optical system 300 has a right-eye observation optical system 300R and a left-eye observation optical system 300L.
  • the entire configuration is shown for the right-eye observation optical system 300R, and only the objective lens 13 shared with the right-eye observation optical system 300R is shown for the left-eye observation optical system 300L.
  • the optical axis O-300R of the right-eye observation optical system 300R and the optical axis O-300L of the left-eye observation optical system 300L pass through the objective lens 13, respectively.
  • the illumination optical system 1800 and the observation optical system 300 are housed in the ophthalmic microscope main body 12.
  • the ophthalmic microscope main body 12 is shown by a dashed dotted line.
  • the illumination optical system 1800 shown in FIG. 6 includes an illumination light source 19, an optical fiber 1801, an output light aperture 1802, a condenser lens 1803, an illumination field aperture 1804, a collimator lens 1805 and a reflection mirror 1806.
  • the optical axis of the illumination optical system 1800 is indicated by O-1800.
  • the illumination light source 19 is provided outside the ophthalmic microscope main body 12 in the present embodiment.
  • One end of an optical fiber 1801 is connected to the illumination light source 19.
  • the other end of the optical fiber 1801 is disposed at a position facing the outgoing light stop 1802 of the ophthalmic microscope main body 12.
  • the illumination light emitted from the illumination light source 19 is guided by the optical fiber 1801 and enters the condenser lens 1803 through the exit light diaphragm 1802.
  • the exit light stop 1802 acts to block a partial area of the exit of the optical fiber 1801.
  • the blocking area by the outgoing light diaphragm 1802 is changed, the outgoing area of the illumination light is changed.
  • the irradiation angle by the illumination light that is, the angle between the incident direction of the illumination light to the eye 11 to be examined and the optical axis of the objective lens 13.
  • the illumination field stop 1804 is provided at a position (position of x) optically conjugate with the front focal position U 0 of the objective lens 13.
  • the collimator lens 1805 converts the illumination light having passed through the illumination field stop 1804 into a parallel light flux.
  • the reflection mirror 1806 reflects the illumination light collimated by the collimator lens 1805 toward the objective lens 13.
  • the light reflected by the reflection mirror 1806 is transmitted through the objective lens 13 and irradiated to the eye 11 to be examined.
  • the illumination light emitted to the subject eye 11 is reflected and scattered by the tissue of the retina.
  • the reflected and scattered return light (also referred to as “observation light”) passes through the objective lens 13 and is incident on the observation optical system 300.
  • the observation optical system 300 is used to observe the subject eye 11 illuminated by the illumination optical system 1800 through the objective lens 13.
  • a variable magnification lens system 301 (lenses 301a, 301b, and 301c), a beam splitter 302 (a beam splitter for acquiring image information for displaying a television camera), an imaging lens 303, An image erecting prism 304, an eye width adjusting prism 305, a field stop 306, and an eyepiece lens 307 are included.
  • the optical axis of the observation optical system 300 is indicated by O-300.
  • the beam splitter 302 of the right-eye observation optical system 300R separates a part of the observation light guided from the subject eye 11 along the right-eye observation optical system and takes a photographing optical system.
  • the imaging optical system 2000 includes an imaging lens 2001, a reflection mirror 2002, and a television camera 2003.
  • the image information acquired by the television camera 2003 is sent to a monitor (not shown) and displayed.
  • the image erecting prism 304 converts an inverted image into an erected image.
  • the eye width adjusting prism 305 is an optical element for adjusting the distance between the left and right observation light paths according to the eye width (the distance between the left eye and the right eye) of the observer.
  • the field stop 306 blocks the peripheral region in the cross section of the observation light to limit the observer's field of view.
  • the field stop 306 is provided at a position (x position) conjugate with the front focal position U0 of the objective lens 13.
  • the right-eye observation optical system 300R and the left-eye observation optical system 300L may be configured to include a stereo variator configured to be insertable into and removable from the light path.
  • the stereo variator is an optical axis position change element for changing the relative position of the optical axes O-300L and O-300R of the left and right observation optical systems respectively guided by the left and right variable magnification lens systems 301.
  • the stereo variator for example, is retracted to a retraction position provided on the observer side with respect to the observation light path.
  • the observation optical system has a front focal position (indicated by U0 in front of the eye 11 when no lens is present between the objective lens 13 and the eye 11). )have.
  • an objective auxiliary lens 17 is provided on the eye 11 side of the objective lens 13.
  • the objective auxiliary lens 17 can be set at a position closer to the objective lens 13 between the front focal position U0 and the objective lens 13, or released from that position.
  • the objective auxiliary lens 17 is selected such that the in-focus point when it is set is the first focal point (U1) which is the anterior eye position of the eye to be examined.
  • U1 the first focal point
  • the objective auxiliary lens 17 is provided on the side of the eye 11 of the objective lens 13 in the observation optical system when observing the anterior segment of the eye 11 to be examined.
  • the objective auxiliary lens 17 can be provided on the opposite side of the objective lens 13 to the eye 11 side to observe the anterior segment of the eye 11 to be examined.
  • FIG. 9 is a side view corresponding to FIG. 6 showing how the posterior eye portion (eg, retina) of the eye 11 to be examined is observed in the device described in FIGS. 6 and 7.
  • 10 is a front view corresponding to FIG. 7, and
  • FIG. 11 (A) is a schematic view corresponding to FIG. 8 (A).
  • the front lens 6 is set at a position closer to the subject eye 11 than the front focal position U0, and the focal point through the lens of the subject eye 11 when set (second focus U2) is set at the position of the retina of the subject eye 11 (posterior eye position).
  • the objective auxiliary lens 17 is released from the light path of the observation optical system.
  • Pre-lens apparatus 2 Ophthalmic microscope 300: Observation optical system 300R: Right-eye observation optical system 300L: Left-eye observation optical system 301: Variable-magnification lens system 302: Beam splitter 303: Imaging lens 304: Image Upright prism 305: Eye width adjustment prism 306: Field stop 307: Eyepiece lens 4: Rotational arm, rotation axis 5: Front lens support 511 to 514: Front lens support frame 521, 522: Joint parts 6, 6 ' 601 to 606: Front lens 1001: Drive motor 1002: Support arm 1003: Pivot axis 1004: Support bracket 1005: Pivot lever 1006: Link arm 1007: Head position adjustment device 11: Eye to be examined 11a: Retina 11b: Crystal 12: Ophthalmic microscope main body 13: objective lens 14: lens barrel 15: inverter unit 16: switching lever 17, 17 ′ ′: objective auxiliary lens 1800: illumination optical system 1801: optical fiber 1802: outgoing light diaphragm 1803

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
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Abstract

Le problème décrit par la présente invention est de développer un dispositif de lentille frontale qui peut échanger au moins deux types de lentilles frontales, qui n'entre pas en contact avec une main d'un chirurgien, d'un assistant et similaire, et qui n'entre pas dans le champ de vision d'un microscope ophtalmique. A cet effet, la présente invention concerne un dispositif de lentille frontale (1) utilisé pour un microscope ophtalmique (2) ayant un système optique d'observation pour observer un oeil (11) à examiner, le dispositif de lentille frontale (1) étant caractérisé en ce qu'il comprend : un corps de support de lentille frontale (5) qui tourne autour d'un axe de rotation sensiblement parallèle à un axe optique (O-300) du système optique d'observation; et une pluralité de lentilles frontales (601, 602, 603) montées sur le corps de support de lentille frontale (5), les lentilles frontales (601, 602, 603) à insérer dans un trajet optique du système optique d'observation pouvant être échangées par rotation du corps de support de lentille frontale (5).
PCT/JP2018/036432 2017-09-28 2018-09-28 Dispositif de lentille frontale et microscope ophtalmique Ceased WO2019066027A1 (fr)

Applications Claiming Priority (4)

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JP2017-189160 2017-09-28
JP2017189160 2017-09-28
JP2017217520A JP7002817B2 (ja) 2017-09-28 2017-11-10 前置レンズ装置及び眼科用顕微鏡
JP2017-217520 2017-11-10

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111067477A (zh) * 2019-12-28 2020-04-28 山东第一医科大学(山东省医学科学院) 一种眼科房角眼前节图像分析系统
EP4570164A3 (fr) * 2023-12-15 2025-09-10 Oculus Optikgeräte GmbH Dispositif d'observation et procédé d'observation d'un oeil

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Publication number Priority date Publication date Assignee Title
JP2003062003A (ja) * 2001-06-13 2003-03-04 Topcon Corp 手術用顕微鏡
JP2009017923A (ja) * 2007-07-10 2009-01-29 Topcon Corp 手術用顕微鏡装置
JP2009205156A (ja) * 2008-02-28 2009-09-10 Carl Zeiss Surgical Gmbh 光学観察装置のためのアタッチメント装置
US20100265460A1 (en) * 2009-04-20 2010-10-21 Dieter Mann Gmbh Wide-Angle Observation at a Surgical Microscope
JP2017080144A (ja) * 2015-10-29 2017-05-18 株式会社トプコン 眼科撮影装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003062003A (ja) * 2001-06-13 2003-03-04 Topcon Corp 手術用顕微鏡
JP2009017923A (ja) * 2007-07-10 2009-01-29 Topcon Corp 手術用顕微鏡装置
JP2009205156A (ja) * 2008-02-28 2009-09-10 Carl Zeiss Surgical Gmbh 光学観察装置のためのアタッチメント装置
US20100265460A1 (en) * 2009-04-20 2010-10-21 Dieter Mann Gmbh Wide-Angle Observation at a Surgical Microscope
JP2017080144A (ja) * 2015-10-29 2017-05-18 株式会社トプコン 眼科撮影装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111067477A (zh) * 2019-12-28 2020-04-28 山东第一医科大学(山东省医学科学院) 一种眼科房角眼前节图像分析系统
EP4570164A3 (fr) * 2023-12-15 2025-09-10 Oculus Optikgeräte GmbH Dispositif d'observation et procédé d'observation d'un oeil

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