JP4354065B2 - Stereo microscope - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a binocular stereomicroscope used for observing or examining a subject's eye.
[0002]
[Prior art]
In general, stereomicroscopes have been applied in a wide range of fields such as industry and medicine, but their purpose of use is not only to simply observe the subject's eye, for example, the subject's eye, but also to the subject's eye. This is because fine observation and examination are performed on the eye to be examined. Therefore, as a stereomicroscope used for such a purpose, it is desired that the examiner can observe and examine the subject's eye in a comfortable posture.
[0003]
A conventional stereo microscope for binoculars has a fixed solid angle (stereo angle) of, for example, 13 °, and the above fixed microscope is used to fix the above-mentioned fixed position to the anterior segment of the subject's eye. Stereoscopic viewing is possible by the body angle. On the other hand, when observing the fundus of the subject's eye with such a stereoscopic microscope, a contact lens is further used.
[0004]
Further, for example, a binocular stereomicroscope described in a patent publication (Japanese Patent Publication No. 7-11507) is provided with a solid angle converter including a rotatable optical element (prism). The body angle is converted by changing the relative position of the optical axis of the partial light beam by the rotatable optical element of the converter, and the anterior eye portion and the fundus oculi portion of the subject's eye can be observed.
[0005]
That is, when observing the anterior segment of the eye to be examined with such a stereomicroscope, the optical element is arranged in a state of parallel plate glass. On the other hand, when observing the fundus of the eye to be examined, this optical element is fixed by rotating, for example, 90 °. As a result, the distance between the left and right optical paths (axis) of the partial light beam is narrowed in the region between the optical element and the objective lens, and the solid angle is reduced, for example, from 13 ° to 4.5 °. In addition, it is necessary to use a contact lens when observing the fundus of the eye to be examined. However, by reducing the body angle, so-called vignetting is reduced, so that the binocular viewing range can be expanded. It becomes.
[0006]
Furthermore, in the binocular stereomicroscope described in, for example, Japanese Patent Application Laid-Open No. 11-281894, the body angle is converted by inserting / removing the body angle converter with respect to the left / right optical axis, and the subject is examined. The anterior eye portion and the fundus oculi of the subject's eye can be observed. In the case of observing the fundus of the eye to be inspected, the body angle is converted to be small as in the case of the stereomicroscope described in the above-mentioned patent publication (Japanese Patent Publication No. 7-11507). .
[0007]
[Problems to be solved by the invention]
As described above, when observing the fundus of the eye to be examined with a conventional stereomicroscope, it is necessary to reduce the body angle. By reducing the body angle, stereoscopic effect cannot be obtained in the observation of the fundus. There is a problem that it ends up.
[0008]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a solid angle conversion unit between the objective lens and the variable magnification optical system so that the solid angle can be converted. By providing a vergence angle adjustment unit between the system and the eyepiece lens so that the vergence angle can be adjusted according to the real angle converted by the real angle conversion unit, the anterior eye part and the fundus of the subject's eye It is intended to provide a binocular stereomicroscope that is more stereoscopic and can be easily viewed with both eyes.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the invention according to claim 1 is a binocular stereomicroscope having left and right optical axes, and a solid angle conversion means for converting a solid angle by changing a relative position of the left and right optical axes; And a convergence angle adjusting unit that adjusts the convergence angle according to the body angle converted by the body angle converting unit.
[0010]
In order to solve the above-mentioned problem, the invention according to claim 2 is a binocular stereomicroscope having left and right optical axes, wherein the body angle conversion means converts the body angle by changing the relative positions of the left and right optical axes. And a convergence angle adjusting means for adjusting the convergence angle, a control means for determining whether or not the body angle has been converted by the body angle converting means, and for controlling the operation of the convergence angle adjusting means based on the determination result; It is provided with.
[0011]
In the stereomicroscope of the invention described in claim 1 or 2, the invention described in claim 3 is characterized in that it comprises means for inserting / removing the body angle converting means with respect to the left / right optical axis.
[0012]
In the stereomicroscope of the invention according to claim 1 or 2, the invention according to claim 4 is the case where the convergence angle adjusting means is converted into a relatively small angle by the entity angle converting means. The convergence angle is also adjusted to a relatively small angle.
[0013]
In the stereomicroscope according to the invention described in claim 3, the invention described in claim 5 includes second insertion / removal means for inserting / removing the convergence angle adjusting means with respect to the left / right optical axis, and The converting means and the convergence angle adjusting means are inserted and removed relative to the left and right optical axes by the first inserting and removing means and the second inserting and removing means.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
FIG. 1 is a plan view showing an external configuration of a binocular stereomicroscope according to an embodiment of the present invention, FIG. 2 is a side view showing an external configuration of a binocular stereomicroscope according to an embodiment of the present invention, and FIG. It is a figure which shows the structure of the optical system of the stereomicroscope for binoculars of embodiment of invention. FIG. 3 shows the configuration of the optical system when the anterior segment of the eye to be examined is observed with the stereomicroscope according to the embodiment of the present invention.
[0016]
As shown in FIGS. 1, 2, and 3, a binocular stereomicroscope 10 according to an embodiment of the present invention is an objective lens provided to face an observation object O such as a subject's eye. An objective lens unit 1 having 1a, and a solid angle conversion unit 6 for converting a solid angle (stereo angle) by refracting two observation light beams that have passed through the objective lens 1a and changing the relative positions of the left and right optical axes; The variable magnification optical system unit 2 including the variable magnification optical systems 2a and 2b for performing the variable magnification on the two observation light beams that have passed through the solid angle conversion unit 6 and the variable magnification optical system unit 2 are used to perform the variable magnification. Imaging lenses 3a and 3b that form an observation light beam at a predetermined position to obtain an observation image, erecting prisms 4a and 4b that erect an observation image obtained by the imaging lenses 3a and 3b, and a convergence angle are adjusted. Wedge prism 0a, it is constituted by the convergence angle adjusting section 30 having 30b and ocular 5a,, the eyepiece unit 5 with a 5b.
[0017]
The objective lens unit 1, the body angle conversion unit 6, the variable magnification optical system unit 2, and the eyepiece unit 5 are arranged in this order along the left and right optical axes in a direction away from the observation object O.
[0018]
In the optical system of the stereomicroscope 10 as shown in FIG. 3, since a solid angle conversion unit to be described later is not disposed on the left and right optical axes L1 and L2, a solid angle α1 (for example, 13 °) is obtained. This facilitates observation of the anterior segment of the eye to be examined.
[0019]
FIG. 4 is a schematic diagram showing the configuration of the stereotactic angle conversion unit in the stereomicroscope according to the embodiment of the present invention, and FIG. 5 shows the optical system when the fundus of the eye to be examined is observed with the stereomicroscope according to the embodiment of the present invention. It is a figure which shows a structure. As shown in FIG. 4, the body angle conversion unit 6 includes body angle conversion prisms 6a and 6b for converting the body angle of the stereomicroscope 10, an installation member 12 for installing the body angle conversion prisms 6a and 6b, and the like. The constructed body angle conversion section 18 and the columns 11a and 11b for inserting and removing the body angle conversion section 18 with respect to the left and right optical axes L1 and L2 by making the body angle conversion section 18 movable in the vertical direction Y1. A moving lever 7 for moving the body angle conversion unit 18 in the vertical direction Y1, and a body angle conversion detection switch 41 for detecting whether the body angle has been converted by insertion / removal of the body angle conversion unit 18 I have.
[0020]
The body angle conversion prisms 6a and 6b are configured to be integrated by, for example, bonding part of them using an adhesive, and are installed on the installation member 12. Further, both end portions of the columns 11 a and 11 b are fixed to the upper and lower inner surfaces of the solid angle conversion unit 6. Further, the installation member 12 is connected to the moving lever 7 and is provided so as to be movable in the vertical direction Y1 with respect to the support columns 11a and 11b. Accordingly, the body angle conversion unit 18 can be moved in the vertical direction Y1 by the moving lever 7.
[0021]
The body angle conversion detection switch 41 detects whether or not the body angle conversion unit 18 is disposed on the left and right optical axes L1 and L2. The actual angle conversion detection switch 41 is turned on, for example, when the actual angle conversion unit 18 is disposed on the left and right optical axes L1 and L2, and the actual angle conversion unit 18 is removed from the left and right optical axes L1 and L2. It is configured to be turned off when it is (retracted).
[0022]
In the optical system of the stereomicroscope 10 as shown in FIG. 5, the solid angle conversion unit 18 is disposed on the left and right optical axes L1 and L2 to form the left and right optical axes L3 and L4. A small body angle α2 (for example, 4.5 °) is obtained. This facilitates observation of the fundus of the eye to be examined.
[0023]
FIG. 6 is a diagram for explaining the conversion of the body angle and the adjustment of the convergence angle in the stereomicroscope according to the embodiment of the present invention. As shown in FIG. 6, the convergence angle is adjusted between θ and δ (θ> δ, for example, approximately 0 °) in accordance with whether the solid angle is converted to α1 or α2.
[0024]
That is, when the anterior eye part of the eye to be examined can be observed, the body angle is converted to α1 by removing the body angle conversion unit 18 from the left and right optical axes L1 and L2, as shown in FIG. . In this case, the convergence angle is further adjusted to θ by arranging the wedge prisms 30a and 30b of the convergence angle conversion unit 30 on the left and right optical axes L1 and L2.
[0025]
On the other hand, when the fundus of the eye to be examined can be observed, the body angle conversion prisms 6a and 6b constituting the body angle conversion unit 18 are arranged on the left and right optical axes L3 and L4 as shown in FIG. The solid angle is converted from α1 to α2. In this case, the convergence angle is further adjusted from θ to δ (here, approximately 0 °) by removing the wedge prisms 30a and 30b of the convergence angle conversion unit 30 from the left and right optical axes L3 and L4.
[0026]
FIG. 7 is a block diagram showing a part of the configuration of the binocular stereomicroscope according to the embodiment of the present invention. As shown in FIG. 7, the stereomicroscope according to the embodiment of the present invention includes a wedge prism drive circuit 40 for inserting / removing the wedge prisms 30a and 30b of the convergence angle adjusting unit 30 with respect to the left and right optical axes, and a body angle. A conversion detection switch 41, a drive motor 43 for turning the eyepieces 5 a and 5 b according to the convergence angle adjusted by the convergence angle conversion unit 30, and an eyepiece driving unit 42 for driving the drive motor 43. A recording unit 44 that records convergence angle information relating to the convergence angle that is adjusted according to the converted body angle, a wedge prism drive circuit 40, a body angle conversion detection switch 41, an eyepiece driving unit 42, and a recording unit. And a control processing unit 50 for controlling the operation of each of 44.
[0027]
The control processing unit 50 checks an on signal or an off signal indicating the on / off state of the body angle conversion detection switch 41, and determines whether or not the convergence angle needs to be adjusted based on the check result. When it is determined that the convergence angle needs to be adjusted, the wedge prisms 30a and 30b are respectively inserted into and removed from the left and right optical axes.
[0028]
8 and 9 are diagrams showing an eyepiece lens turning mechanism for turning the eyepiece lens in the binocular stereomicroscope according to the embodiment of the present invention. 8 is a plan view of the eyepiece lens turning mechanism as viewed from above, and FIG. 9 is a side view of the eyepiece lens turning mechanism shown in FIG.
[0029]
As shown in FIG. 8 and FIG. 9, the eyepiece lens unit turning mechanism includes installation members 60a and 60b for installing the eyepiece units 5a and 5b, and installation members 60a and 60b, respectively. The rotating gears 61a and 61b are engaged with each other, the rotating gear 62 is engaged with the rotating gear 61b, and the drive motor 43 is connected to the rotating shaft 63 of the rotating gear 62.
[0030]
When the driving motor 43 is driven by controlling the operation of the eyepiece lens unit driving circuit 42 under the control of the control processing unit 50, the rotating gear 62 is rotated by the rotation of the rotating shaft 63 by the driving motor 43. With the rotation of the rotation gear 62, the rotation gear 61b meshing with the rotation gear 62 rotates, whereby the installation member 60b turns by a predetermined angle θ / 2 which is an angle that is ½ of the convergence angle θ. Further, as the rotation gear 61b rotates, the rotation gear 61a meshed with the rotation gear 61b rotates, and thereby the installation member 61a turns by a predetermined angle θ / 2 which is an angle that is ½ of the convergence angle θ.
[0031]
Accordingly, the eyepieces 5a and 5b respectively installed on the installation members 60a and 60b are rotated by θ / 2 with respect to the left and right optical axes with the rotation shafts 64a and 64b as fulcrums.
[0032]
Next, the operation of the stereomicroscope according to the embodiment of the present invention will be described.
[0033]
For example, when the anterior eye part of the eye to be examined can be observed, the body angle conversion part 18 is moved downward along the support pillars 11a and 11b by using the moving lever 7 and removed from the left and right optical axes. Thereby, the solid angle α1 is obtained. When the body angle conversion unit 18 is removed from the left and right optical axes, the body angle conversion detection switch 41 is turned off and an off signal is output to the control processing unit 50.
[0034]
When the control processing unit 50 receives the OFF signal from the body angle conversion detection switch 41, the operation of the wedge prism drive circuit 40 is controlled to insert the wedge prisms 30a and 30b on the left and right optical axes L1 and L2.
[0035]
Further, the control processing unit 50 controls the operation of the eyepiece lens portion drive circuit 42 based on the convergence angle information recorded in the recording unit 44 to drive the drive motor 43. As a result, the installation members 60a and 60b on which the eyepieces 5a and 5b are installed rotate about the rotation axes 64a and 64b by a predetermined angle θ / 2 in directions away from each other.
[0036]
By the operation as described above, the convergence angle is adjusted to θ according to the converted body angle α1, and the optical system of the stereomicroscope 10 as shown in FIG. 3 is configured.
[0037]
On the other hand, for example, when the fundus of the eye to be examined can be observed, the body angle conversion unit 18 is moved upward along the columns 11a and 11b by using the moving lever 7 and arranged on the left and right optical axes. Let As a result, the solid angle is converted from α1 to α2. When the body angle conversion unit 18 is disposed on the left and right optical axes, the body angle conversion detection switch 41 is turned on, and an ON signal is output to the control processing unit 50.
[0038]
When the control processing unit 50 receives the ON signal from the body angle conversion detection unit 41, it controls the operation of the wedge prism drive circuit 40 to remove the wedge prisms 30a and 30b from the left and right optical axes.
[0039]
Further, the control processing unit 50 controls the operation of the eyepiece lens portion drive circuit 42 based on the convergence angle information recorded in the recording unit 44 to drive the drive motor 43. As a result, the installation members 60a and 60b on which the eyepieces 5a and 5b are installed turn about the rotation shafts 64a and 64b as fulcrums, respectively, by a predetermined angle θ / 2.
[0040]
By the operation as described above, the convergence angle is adjusted to an angle smaller than θ (approximately 0 °) according to the converted body angle α2, and the optical system of the stereomicroscope 10 as shown in FIG. 5 is configured.
[0041]
As described above, in the embodiment of the present invention, the body angle conversion unit is inserted and removed in the vertical direction (vertical direction) with respect to the left and right optical axes of the observation light beam according to the necessary body angle. Therefore, when observing the anterior segment of the eye to be examined (the body angle is α1), the body angle conversion unit is removed from the left and right optical axes at a position where the observation light beam is not displaced, and is unnecessary on the left and right optical axes. The optical member is not disposed. Thereby, a clearer observation image can be obtained.
[0042]
In addition, since the convergence angle is adjusted by the convergence angle adjustment unit according to the conversion of the body angle, it is possible to observe with a stereoscopic effect. In particular, when the body angle is converted to a relatively small angle in order to observe the fundus of the eye to be examined, the convergence angle is also adjusted to a relatively small angle (approximately 0 °). Therefore, it is possible to easily perform observation with a stereoscopic effect on the fundus of the eye to be examined.
[0043]
In the embodiment of the present invention, as described above, the body angle conversion unit converts the body angle by inserting / removing the body angle conversion unit with respect to the left and right optical axes. The body angle can be changed by rotating the member on the left and right optical axes.
[0044]
In the present invention, a solid angle conversion unit including a plurality of solid angle conversion units each having a different solid angle may be used. By using such a body angle conversion unit, the width for selecting the body angle increases as necessary, so that it is possible to more easily observe and examine the subject's eye.
[0045]
Furthermore, by providing a convergence angle conversion unit that can adjust a plurality of convergence angles corresponding to the converted body angles, an optimal stereoscopic effect can be obtained at each body angle.
[0046]
【The invention's effect】
As described above, according to the present invention, in a stereoscopic microscope for binoculars, a solid angle conversion unit is provided between the objective lens and the variable power optical system to convert the solid angle, and the variable power optical system and the eyepiece By providing a vergence angle adjustment unit between them, it is possible to adjust the vergence angle according to the actual angle converted by the real angle conversion unit, thereby observing and examining the anterior and fundus of the subject's eye Can be easily performed.
[Brief description of the drawings]
FIG. 1 is a plan view showing an external configuration of a binocular stereomicroscope according to an embodiment of the present invention.
FIG. 2 is a side view showing an external configuration of a binocular stereomicroscope according to an embodiment of the present invention.
FIG. 3 is a diagram showing a configuration of an optical system of a binocular stereomicroscope according to an embodiment of the present invention.
FIG. 4 is a schematic diagram showing a configuration of a body angle conversion unit in the binocular stereomicroscope according to the embodiment of the present invention.
FIG. 5 is a diagram showing a configuration of an optical system in the case of observing a fundus portion of an eye to be examined with a binocular stereomicroscope according to an embodiment of the present invention.
FIG. 6 is a diagram for explaining the conversion of the body angle and the adjustment of the convergence angle in the binocular stereomicroscope according to the embodiment of the present invention.
FIG. 7 is a block diagram showing a part of the configuration of a binocular stereomicroscope according to an embodiment of the present invention.
FIG. 8 is a diagram showing an eyepiece lens turning mechanism for turning the eyepiece lens in the binocular stereomicroscope according to the embodiment of the present invention.
FIG. 9 is a diagram showing an eyepiece lens part turning mechanism for turning the eyepiece part in the binocular stereomicroscope according to the embodiment of the present invention.
[Explanation of symbols]
α1, α2 Body angle θ Convergence angle L1, L2, L3, L4 Left / right optical axis O Observation object 1 Objective lens unit 1a Objective lens 2 Variable magnification optical system unit 2a, 2b Variable magnification optical system 3a, 3b Imaging lens 4a, 4b Erecting prism 5 Eyepiece unit 5a, 5b Eyepiece unit 6 Solid angle conversion unit 6a, 6b Solid angle conversion prism 7 Moving lever 10 Stereo microscope 18 Solid angle conversion unit 30 Convergence angle conversion unit 30a, 30b Wedge prism 40 Wedge prism Drive circuit 41 Body angle switch detection switch 42 Eyepiece lens drive circuit 43 Drive motor 44 Recording unit 50 Control processing unit

Claims (5)

In a binocular stereo microscope with left and right optical axes,
A body angle converting means for converting a body angle by changing a relative position of the left and right optical axes;
A stereomicroscope comprising: a convergence angle adjusting unit that adjusts a convergence angle according to the body angle converted by the body angle converting unit. In a binocular stereo microscope with left and right optical axes,
A body angle converting means for converting a body angle by changing a relative position of the left and right optical axes;
A convergence angle adjusting means for adjusting a convergence angle;
A stereomicroscope comprising: a control unit that determines whether or not the body angle has been converted by the body angle conversion unit, and controls the operation of the convergence angle adjustment unit based on the determination result. The stereomicroscope according to claim 1 or 2, further comprising first insertion / removal means for inserting / removing the body angle conversion means with respect to the left / right optical axis. The convergence angle adjusting means adjusts the convergence angle to a relatively small angle when the solid angle is converted to a relatively small angle by the solid angle converting means. 2. A stereomicroscope according to 2. And a second insertion / removal unit that inserts / removes the convergence angle adjustment unit with respect to the left and right optical axes. The solid angle conversion unit and the convergence angle adjustment unit include the first insertion / removal unit and the second insertion / removal unit. The stereomicroscope according to claim 3, wherein the stereomicroscope is inserted / removed relative to the left and right optical axes by insertion / removal means.

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