JP2001198088A - Stereo microscope - Google Patents

Abstract

(57) [Problem] The present invention makes it possible to satisfactorily perform, for example, fundus observation of an eye to be inspected without impairing the anterior ocular segment observation function of the eye to be inspected by irradiating high color temperature illumination light. A stereo microscope. SOLUTION: A light source 51 composed of a halogen bulb is provided to an eye to be examined.
An illumination system 8 for irradiating illumination light emitted from the
A stereoscopic microscope 1 having an observation system 6 for observing an image of the eye E to be examined illuminated by a color temperature conversion element 61 for converting the color temperature of observation light provided in the optical path of the observation system 6 so as to be insertable and removable; Mode switching means for switching the observation mode for the eye E to the anterior ocular segment observation mode and the intraocular observation mode; and when the mode switching means is switched to the intraocular observation mode, the color temperature conversion element 61 is connected to the observation system. And an electromagnetic solenoid 62 that is inserted into the optical path of the observation system 6 and separates the color temperature conversion element 61 from the optical path of the observation system 6 when the mode is switched to the anterior ocular segment observation mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereomicroscope, and more particularly, to an easy-to-see fundus image and the like.
The present invention relates to a stereoscopic microscope, such as a slit lamp microscope or an operation microscope, which can facilitate observation of a fundus of a subject's eye and treatment of the fundus.

[0002]

2. Description of the Related Art For example, a contact lens or a front lens is used when observing the fundus of a subject's eye with a stereoscopic microscope such as a slit lamp microscope or when performing treatment such as photocoagulation on the fundus. . If one wishes to view the fundus image of the eye to be examined with both eyes, light reflected by the contact lens or the front lens enters the observation field at this time. In order to avoid this, the angle between the observation optical axis and the illumination optical axis must be increased, and as a result, binocular vision of the eye to be inspected becomes impossible. Accordingly, it is necessary to reduce the angle between the observation optical axis and the illumination optical axis.

When photocoagulation of the fundus of the eye to be examined is performed, the width of the slit light (slit light) is usually set to about three times the size of the nipple of the eye to be examined. Therefore, the angle at which the optical axis of the illumination system is swung to escape reflection from the surface in contact with the air in the contact lens does not become so large.

However, when the position of the fundus where photocoagulation is performed is changed, the position of the contact lens must also be changed, and at this time, the light reflected from the contact lens is illuminated by the slit light and the fundus image. Get inside.

[0005] Therefore, the illumination optical axis must be shifted with respect to the observation optical axis to escape the reflection, which hinders the observation and treatment of the fundus of the eye to be examined.

On the other hand, when observing only the fundus, it is necessary to widen the observation range and swing the illumination optical axis in a wide range. Therefore, the illumination system blocks a part of the observation system, and the binocular vision of the fundus becomes difficult. It will be difficult.

As a countermeasure, for example, a yellow (yellow) type front lens is used. When a yellow type head lens is used, even if the reflected light from the head lens is within the observation field of view, it looks very weak, the angle between the illumination optical axis and the observation optical axis is quite small, and the binocular vision of the fundus is difficult. Can be achieved to some extent. In addition, the stimulation to the retina of the patient is weak, which is effective in protecting the retina.

However, in this case, there is a problem that the yellow tint of the fundus image increases.

In the case of a stereomicroscope for observing the fundus of the eye to be examined and treating the fundus, a halogen bulb is mainly used as the light source of the illumination system. Illumination light from a halogen bulb has a high color temperature and is suitable for observing the anterior segment of the subject's eye.

However, when the fundus observation and fundus treatment of the eye to be examined are performed, the color temperature of the illumination light is so high that the fundus image looks whitish, and the flare component is strong, and a good fundus image is observed or observed. Inability to give treatment.

It is known that, for example, by using a tungsten bulb having a low color temperature by a halogen bulb as a light source of the illumination system, the illumination light becomes a warm color system and the fundus image of the eye to be examined can be observed well.

[0012]

As described above, a stereomicroscope using a halogen bulb as a light source for the illumination system is suitable for observing the anterior segment of the eye to be examined, but it is necessary to observe the fundus of the eye to be examined. In this case, there is a problem that the color temperature of the illumination light is too high and is unsuitable.

Therefore, the present invention provides good observation of the fundus without impairing the function of observing the anterior eye such as the cornea and the crystalline lens of the subject's eye and other parts other than the fundus by the irradiation of the illumination light having a high color temperature. It is intended to provide a stereoscopic microscope capable of performing the above.

[0014]

According to the first aspect of the present invention,
In a stereoscopic microscope having an illumination system that irradiates illumination light emitted from a light source to an eye to be inspected, and an observation system that observes an image of the eye to be illuminated by the illumination system, an optical path of the illumination system or an optical path of the observation system A color temperature conversion element for converting the color temperature of the illumination light or the observation light is provided in any of them so as to be able to be inserted and removed.

According to the present invention, the color temperature conversion element for converting the color temperature of the illumination light or the observation light is detachably provided in either the optical path of the illumination system or the optical path of the observation system. By inserting or removing the color temperature conversion element in either the optical path of the illumination system or the optical path of the observation system according to the image observation mode, the function of observing the anterior segment of the eye to be inspected by irradiating illumination light with a high color temperature is impaired. In addition, when performing intraocular observation other than the anterior segment of the subject's eye, for example, fundus observation, it is possible to see an observation image in a state where the color temperature is converted, and anterior segment observation and fundus observation Etc. can be performed satisfactorily.

According to a second aspect of the present invention, there is provided an illumination system for irradiating an eye to be inspected with illumination light emitted from a light source made of a halogen bulb, and an observation system for observing an image of the eye to be illuminated by the illumination system. In the stereomicroscope, a color temperature conversion element for converting the color temperature of illumination light or observation light that is removably provided in either the optical path of the illumination system or the optical path of the observation system, and an observation mode for the subject's eye, Mode switching means for switching between the eye observation mode and the intraocular observation mode, and when the mode switching means switches to the intraocular observation mode, the color temperature conversion element is inserted into either the optical path of the illumination system or the optical path of the observation system. And a conversion element driving unit for detaching the color temperature conversion element from the optical path of the illumination system or the optical path of the observation system when switching to the anterior ocular segment observation mode.

According to the invention, when the mode is switched to the intraocular observation mode by the mode switching means, the color temperature conversion element is inserted into either the optical path of the illumination system or the optical path of the observation system by the conversion element driving means. Also, when the mode is switched to the anterior ocular segment observation mode, the color temperature conversion element is separated from the optical path of the illumination system or the optical path of the observation system. Observation in which the color temperature is converted by a color temperature conversion element when performing intraocular observation of the eye to be examined without impairing the anterior eye observation function of the eye to be examined, and in cases other than the anterior eye of the eye to be examined, such as fundus observation. It is possible to see the image, anterior segment observation,
Observation of the fundus can be performed satisfactorily.

According to a third aspect of the present invention, there is provided an illumination system for irradiating the subject's eye with illumination light emitted from a light source composed of a halogen bulb, and an observation system for observing an image of the subject's eye illuminated by the illumination system. In the stereomicroscope, an observation mode for the subject's eye, a mode switching unit that switches between an anterior segment observation mode and an intraocular observation mode, and an intraocular observation mode by the mode switching unit, according to switching to the anterior segment observation mode. Changing the voltage of the light source comprising the halogen bulb,
A stereomicroscope comprising: light source voltage control means for optimizing illuminance of illumination light for the inside of the eye to be examined and illumination light for the anterior eye.

According to the present invention, the light source voltage control means changes the voltage of the light source made of a halogen bulb in accordance with the switching between the anterior eye observation mode and the intraocular observation mode by the mode switching means. Since the illuminance of the illumination light for the inside and the illumination light for the anterior segment is optimized, the optimal images can be seen when observing the anterior segment image and observing the intraocular image such as the fundus. , Anterior eye observation, fundus observation, and the like can be respectively performed well.

According to a fourth aspect of the present invention, there is provided an illumination system for irradiating the eye to be inspected with illumination light emitted from a light source comprising a halogen bulb, and an observation system for observing an image of the eye to be illuminated by the illumination system. In the stereomicroscope, a color temperature conversion element for converting the color temperature of illumination light or observation light that is removably provided in either the optical path of the illumination system or the optical path of the observation system, and an observation mode for the subject's eye, Mode switching means for switching between the eye observation mode and the intraocular observation mode, and when the mode switching means switches to the intraocular observation mode, the color temperature conversion element is inserted into either the optical path of the illumination system or the optical path of the observation system. A conversion element driving unit that separates the color temperature conversion element from the optical path of the illumination system or the optical path of the observation system when switching to the anterior eye observation mode; and an intraocular observation mode by the mode switching unit. In conjunction with the switching to the anterior segment observation mode, the voltage of the light source composed of the halogen bulb is changed, and the illumination light for the eye of the subject's eye and the light source voltage for optimizing the illuminance of the illumination light for the anterior segment are optimized. And control means.

According to the present invention, in a configuration in which the inventions of the second and third aspects are combined, particularly when observing an intraocular image such as a fundus, the color temperature conversion by the color temperature conversion element and the control by the light source voltage control means are performed. Synergistic action of the optometry with the illuminance conversion of the illumination light to the inside of the eye enables more favorable fundus observation and the like.

[0022]

Embodiments of the present invention will be described below.

(Embodiment 1) A stereo microscope 1 according to Embodiment 1 shown in FIG. 1 is supported on a table 2 via a moving mechanism 3 so as to be movable in horizontal and horizontal directions and in vertical and horizontal directions. A table 4, an operation handle 5 for displacing the base 4 in horizontal and horizontal directions by tilting operation, and an observation system 6, a light source, and a lens barrel main body respectively supported by the base 4, are disposed to face each other. It has a lighting system 8 having a slit, a chin rest 10a for a subject facing a lens barrel body 9 containing an objective lens of an observation system 6, and a chin rest 10 having a forehead rest 10b. I have. On the side surface of the lens barrel main body 9, a rotating shaft for changing the magnification of observation is projected, and on the outer periphery of the rotating shaft, there are 6, 10, 16, 25, 40, etc. indicating the observation magnification of the observation system 6. An operation knob 11 with a number is attached.

FIGS. 2 and 3 schematically show the optical configuration of the stereomicroscope 1 according to the present embodiment. The slit lamp microscope 1 includes an observation system 6 housed in a lens barrel body 9 and a mirror. Tube body 9
And an illumination system 8 arranged orthogonally to the mirror 12 facing the eye E with respect to the observation system 6 with respect to the observation system 6.

The observation system 6 includes a mirror 12, an objective lens 31, a variable power optical system 32, and a beam splitter 34.
, A relay lens 35, a prism 36 for changing the optical path to the eyepiece tube 9a side, and an eyepiece lens 37 disposed in the eyepiece tube 9a, and an image of the eye E to be inspected (anterior eye image shown in FIG. 7). , An eye fundus image shown in FIG. 8) is formed on an image forming point P shown in FIG. 2 and can be observed by the examiner's eye E0.

The image pickup device 20 includes a condenser lens 41 for condensing a light beam split by the beam splitter 34.
And a mirror 42 that bends the light beam from the condenser lens 41 at a right angle of 90 degrees, and an imaging camera 43.

The observation system 6 includes an examiner's eye E as shown in FIG.
There are two systems so that stereoscopic viewing by 0 is possible.

As shown in FIG. 2, the illumination system 8 includes a light source 51 composed of a halogen lamp, condensing lenses 52 and 53 for condensing light from the light source 51, and condensing lenses 52 and 53. A field stop 54 for passing only a part of the light passed therethrough, a projection lens 55 for projecting the light passing through the field stop 54, and a strobe light source such as a xenon lamp disposed between the light source 51 and the condenser lens 52 56.

The field stop 54 and the eye E are arranged so as to be conjugate to the projection lens 55, so that, for example, the cornea of the eye E is As shown in FIG. 6, an anterior eye image E corresponding to a corneal cross section (shown by hatching in FIG. 6) Ed of the eye E is irradiated with local illumination light (hereinafter referred to as “slit light”).
d 'is made observable.

As shown in FIGS. 2 and 3, the stereoscopic microscope 1 according to the first embodiment further includes a color conversion lens for converting the color temperature of the observation light between the variable power optical system 32 and the condenser lens 33. The temperature conversion element 61 is arranged so as to be able to be inserted and removed by the operation of an electromagnetic solenoid 65 which is a color temperature conversion element driving means.

As shown in FIG. 4, the color temperature conversion element 61 includes two color temperature conversion filters 63 on a substrate 62 at a predetermined interval (the center interval is the distance L between the optical axes for both eyes of the illumination system 6). (Coincident intervals).

Instead of the color temperature conversion element 61, as shown in FIG. 4, two color temperature conversion filters 66 are provided on the rotating disk 64 at an interval corresponding to the distance L between the optical axes at an arrangement of 180 degrees. , These two color temperature conversion filters 6
6 and two color holes 67 provided at positions shifted by 90 degrees from each other.
Is rotated by a rotation driving means (not shown) to insert two color temperature conversion filters 66 into the binocular optical axes of the illumination system 6 (in intraocular mode) or to illuminate two holes 67. It may be configured to be inserted into the binocular optical axis of the system 6 (at the time of the anterior segment mode).

FIG. 9 shows a main part of a control system of the stereomicroscope 1 and functions as a light source voltage control means for lighting the light source 51 and controlling the voltage of the driving voltage. A control unit 81 for controlling the entire stereomicroscope 1 including lighting control;
3, a power supply unit 85 for supplying electric power necessary for the operation of the entire stereomicroscope 1, and an operation switch 86 for supplying an operation signal to the control unit 81. Further, an image signal from the imaging camera 43 is captured. An image control unit 82 and an image monitor 83 such as a liquid crystal display connected to the image control unit 82
And an image memory 84 as storage means connected to the image control unit 82. The image control unit 82, the image monitor 83, and the image memory 84 are configured as an image processing device separate from the stereomicroscope 1.

The operation switch 86 includes an anterior segment key 91 for setting the observation mode for the eye E to the anterior segment mode.
And an intraocular key 92 for setting the observation mode for the eye E to the intraocular mode. The anterior segment mode refers to a mode for observing the cornea, iris, crystalline lens, and the like of the eye E,
Further, the following description will be made assuming that the intraocular mode refers to a mode for observing the fundus of the eye E, the vitreous body, and the like.

Next, the operation of the stereomicroscope 1 according to the first embodiment will be described.

In the stereomicroscope 1, when the anterior segment key 91 is operated to set the anterior segment mode, the electromagnetic solenoid 65 is maintained in a non-operating state under the control of the controller 81, and The color temperature conversion filter 63 of the temperature conversion element 61 is in a detached state that is not inserted into the optical path of the illumination system 6.

A light source 51 comprising the halogen bulb
The light emitted from the field stop 54
Pass through. Since the field stop 54 and the eye E are arranged conjugate with each other, the slit light formed by passing through the field stop 54 passes through the projection lens 55 and the mirror 12 as shown in FIG. A portion (corneal cross section: shaded in FIG. 6) Ed is irradiated.

In this manner, the light radiated to the eye E and reflected by the corneal section Ed of the eye E and the light flux reflected by the entire eye E are converted into an objective lens of the observation system 6 at a high color temperature. The beam passes through a beam splitter 34, and a part of the beam passes through a beam splitter 34 to form an image at an image point P shown in FIG.
By 0, the image is clearly observed as the anterior segment image Ed ′.

The luminous flux split by the beam splitter 34 enters the imaging camera 43 via the mirror 42, whereby an observation image identical to the observation image of the examiner's eye E0 is captured by the imaging camera 43. The image control unit 82
The image is sent to the image monitor 83 under the control of, and is displayed as an anterior ocular segment image Ed ′ as shown in FIG.

On the other hand, when the intraocular mode is set by operating the intraocular key 92, the electromagnetic solenoid 65 operates under the control of the control unit 81, and the color temperature conversion filter 63 of the color temperature conversion element 61 is operated. Is inserted into the optical path of the illumination system 6.

As a result, the fundus oculi Ef of the eye E is irradiated with the illumination light through the same route as in the case described above, the reflected light from the fundus oculi Ef passes through the objective lens 31 of the observation system 6, and further, the variable power optics. After passing through the system 32, the color temperature conversion filter 63, and the beam splitter 34, a part thereof forms an imaging point P shown in FIG.
The color temperature is converted into a warm-colored fundus image Ef 'which is easy to see and is observed by the examiner's eye E0.

The image data is sent to the image monitor 83 and displayed as a fundus image Ef 'as shown in FIG.

As described above, according to the first embodiment, observation of the anterior segment of the eye E, observation of the fundus, and the like can be performed in good condition.

FIG. 10 shows a modification of the first embodiment. In place of the case shown in FIG. 2, the color temperature of the illumination light is set between the field stop 54 and the projection lens 55 of the illumination system 8. Is characterized in that the color temperature conversion element 61 for converting the color temperature is arranged so that it can be inserted and removed by the operation of the electromagnetic solenoid 65 which is the color temperature conversion element driving means.

Considering the case where the color temperature conversion filter 63 is placed in the optical path of the illumination system 8, the color temperature at the fundus Ef is K 1, and the color temperature at the fundus Ef when the color temperature conversion element 61 is placed in the illumination system 8. Is K2 and the color temperature conversion capability (Mired value) of the color temperature conversion element 61 is a, the color temperature K2 at the fundus oculi Ef can be expressed by the following equation (1).

[0046]

(Equation 1) For example, when the color temperature conversion element 61 in the fundus oculi Ef is not inserted, the color temperature K1 = 3300K, and the color temperature conversion capability a = 40.
Then, the fundus oculi Ef when the color temperature conversion element 61 is inserted
'Will be K2 = 2915K.

Further, if the color temperature K1 = 3800K when the color temperature conversion element 61 is not inserted in the fundus oculi Ef and the color temperature conversion capability a = 40, then the color temperature in the fundus oculi Ef when the color temperature conversion element 61 is inserted. The color temperature K2 becomes 3299K.

The fundus oculi image Ef 'of the fundus oculi Ef having such a color temperature is still observed pale. It is known that a preferable color temperature on the object surface (the fundus oculi Ef surface) is approximately 2500K to 2900K.

In the first embodiment, the object plane (fundus Ef
The color temperature conversion element 61 having a color temperature conversion capability a such that the color temperature on the surface (2) is about 2500 K to 2900 K is selected.

(Embodiment 2) Next, a stereomicroscope 1 according to Embodiment 2 of the present invention will be described with reference to FIGS. 9, 11, 12, and 13. FIG. FIG. 11 shows the general 12
9 shows voltage-luminous flux characteristics of a light source 51 composed of a halogen lamp of V, 30 W. Further, FIG.
FIG. 5 is a characteristic diagram showing a relationship between a wavelength of a 0 W halogen bulb and a change in spectral radiance.

In the second embodiment, the anterior segment key 9
1. In accordance with the operation of the intraocular key 92, the voltage of the light source 51 composed of the halogen bulb is changed to optimize the illuminance of the illumination light for the fundus oculi Ef of the eye E and the illumination light for the anterior segment Ed. It is a feature that it did so.

That is, when the lit needs to be cut finely and the anterior segment key 91 is operated to set the anterior segment mode, the drive voltage for the light source 51 is controlled based on the control of the control unit 81 as shown in FIG. 11, 12 V shown in FIG. 12, and in this state, the illumination system 8 can irradiate the anterior ocular segment Ed with an illuminance close to the maximum illuminance (about 800 lumens) by the operation of the illumination system 8.

As a result, as in the case of the first embodiment, it is possible to clearly observe the anterior segment image Ed 'by the examiner's eye E0.

On the other hand, when the intraocular mode is set by operating the intraocular key 92, the drive voltage for the light source 51 is set to, for example, 8 V shown in FIGS. 11 and 12 under the control of the control section 81. In this state, at most, the illumination system 8 can only irradiate the fundus Ef with the illuminance (about 220 lumens) reduced to about 1/4 of that in the anterior segment mode by the operation of the illumination system 8. As a result, similar to the first embodiment,
The examiner's eye E0 makes it possible to observe the illuminance as an easy-to-see fundus image Ef '.

The relationship between the wavelength of the light source 51 composed of a halogen bulb and the change in the spectral radiance is as shown by the characteristic a shown in FIG. 13 when the illuminance is 400,000 lux. At this time, the color temperature is 3810K.

When the color temperature conversion element 61 is placed in the optical path of illumination light from a halogen bulb, the relationship between the wavelength of the light source 51 and the change in the spectral radiance is as shown by a characteristic b shown in FIG. At this time, the color temperature is around 3387K.

Therefore, as in the second embodiment, the driving voltage for the light source 51 is reduced in the intraocular mode to reduce the fundus Ef.
Is performed, the color temperature conversion element 61 having a high color temperature conversion capability can be observed as an easy-to-read fundus image Ef ′ with low illuminance as if it were placed in the optical path of the illumination light.

Also, the operations of the first and second embodiments are combined to insert the color temperature conversion element 61 into the optical path under the control of the control unit 81 in the intraocular mode.
By linking the reduction of the drive voltage with respect to 1, a more easily viewable fundus image Ef 'is formed and observed by the examiner's eye E0 or imaged by the imaging camera 43 and displayed as a more easily viewable fundus image Ef'. It is also possible.

In the illumination system 8, though not shown, an ND filter,
A green filter, a heat-insulating filter, an infrared filter, and the like are used, but it is also possible to adopt a configuration in which the color temperature conversion filter 63 of the color temperature conversion element 61 described above is incorporated in a filter substrate incorporating these filter groups. Thereby, space saving and cost reduction can be achieved as compared with a case where the color temperature conversion element 61 is separately incorporated.

FIG. 12 shows a voltage display section 100 according to the second embodiment. This voltage display section 10
0 is, for example, using a liquid crystal display or the like, and as shown in the left column of FIG.
And the half scale 101b of 0 to 8V is switched and displayed as needed.

By using such a voltage display unit 100, the drive voltage of the light source 51 can be confirmed while clearly distinguishing between the anterior segment mode and the intraocular mode.

Further, when the anterior segment key 91 is operated to set the anterior segment mode, the color temperature conversion element 61 may be inserted into the optical path to observe the anterior segment image Ed '. Of course it is possible. In this case, the anterior ocular segment image Ed '
Can be observed as an image with higher contrast.

[0063]

According to the first and second aspects of the present invention, the function of observing the anterior segment of the eye by irradiating the illumination light with a high color temperature is not impaired and the intraocular portion of the eye other than the anterior segment of the eye to be inspected. Observation, for example, when performing fundus observation and the like, it becomes possible to see an observation image in a state where the color temperature is converted,
It is possible to provide a stereomicroscope capable of performing good observations of the fundus oculi and the like.

According to the third aspect of the present invention, when observing an anterior ocular segment image and observing an intraocular image such as a fundus, an image having the optimum illuminance can be viewed. Can be performed satisfactorily.

According to the fourth aspect of the present invention, the color temperature conversion and the illuminance change are combined to observe the anterior eye, and
It is possible to provide a stereomicroscope that can perform fundus observation and the like more favorably.

[Brief description of the drawings]

FIG. 1 is a side view showing an appearance of a stereomicroscope according to Embodiment 1 of the present invention.

FIG. 2 is a schematic diagram showing an optical configuration of a stereo microscope according to the first embodiment.

FIG. 3 is a schematic diagram showing an optical configuration of an observation system of the stereo microscope according to the first embodiment.

FIG. 4 is a plan view of the color temperature conversion element according to the first embodiment.

FIG. 5 is a plan view showing another example of the color temperature conversion element of the first embodiment.

FIG. 6 is an explanatory diagram showing an irradiation state of slit light to an eye to be inspected in the first embodiment.

FIG. 7 is a diagram illustrating a display state of an anterior segment image according to the first embodiment;

FIG. 8 is a diagram showing a display state of a fundus image according to the first embodiment.

FIG. 9 is a block diagram showing a main part of a control system of the stereomicroscopes of the first and second embodiments.

FIG. 10 is a schematic diagram showing a modification of the stereomicroscope according to the first embodiment.

FIG. 11 is a diagram showing drive voltage-luminous flux characteristics of a light source according to the second embodiment.

FIG. 12 is an explanatory diagram illustrating a voltage display unit according to the second embodiment.

FIG. 13 is a characteristic diagram showing a relationship between a halogen bulb and a change in spectral radiance of a wavelength according to the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stereo microscope 6 Observation system 8 Illumination system 12 Mirror 20 Imaging device 31 Objective lens 32 Variable power optical system 34 Beam splitter 35 Relay lens 36 Prism 43 Imaging camera 51 Light source 52 Condensing lens 53 Condensing lens 54 Field stop 55 Projection lens 56 Strobe light source 61 Color temperature conversion element 63 Color temperature conversion filter 65 Electromagnetic solenoid 81 Control unit 82 Image control unit 83 Image monitor 84 Image memory 86 Operation switch 91 Anterior eye key 92 Intraocular key

Claims (4)

[Claims] 1. A stereo microscope having an illumination system for irradiating illumination light emitted from a light source to an eye to be inspected, and an observation system for observing an image of the eye to be illuminated by the illumination system, wherein an optical path of the illumination system or A stereoscopic microscope, wherein a color temperature conversion element for converting a color temperature of the illumination light or the observation light is detachably provided in any one of the optical paths of the observation system. 2. A microscope comprising: an illumination system for irradiating an eye to be inspected with illumination light emitted from a light source composed of a halogen bulb; and an observation system for observing an image of the eye to be illuminated by the illumination system. A color temperature conversion element that converts the color temperature of illumination light or observation light that is removably provided in either the optical path of the observation system or the optical path of the observation system; and an observation mode for the subject's eye, an anterior segment observation mode and an intraocular observation mode. Mode switching means for switching to an observation mode, and when switching to the intraocular observation mode by the mode switching means, the color temperature conversion element is inserted into either the optical path of the illumination system or the optical path of the observation system, and an anterior ocular segment observation mode And a conversion element driving unit that separates the color temperature conversion element from the optical path of the illumination system or the optical path of the observation system when switching to. 3. A stereomicroscope comprising: an illumination system for irradiating illumination light emitted from a light source made of a halogen bulb to an eye to be inspected; and an observation system for observing an image of the eye to be illuminated by the illumination system. A mode switching unit for switching an observation mode for an optometry between an anterior segment observation mode and an intraocular observation mode; and the halogen bulb according to switching to an intraocular observation mode and an anterior segment observation mode by the mode switching unit. A stereo microscope comprising: light source voltage control means for changing the voltage of a light source to optimize illuminance of illumination light for the inside of the eye to be examined and illumination light for the anterior eye. 4. A stereomicroscope comprising: an illumination system for irradiating illumination light emitted from a light source made of a halogen bulb to an eye to be inspected; and an observation system for observing an image of the eye to be illuminated by the illumination system. A color temperature conversion element that converts the color temperature of illumination light or observation light that is removably provided in either the optical path of the system or the optical path of the observation system; and an observation mode for the subject's eye, an anterior segment observation mode and an eye. Mode switching means for switching to an intraocular observation mode, and when switching to the intraocular observation mode by the mode switching means, the color temperature conversion element is inserted into either the optical path of the illumination system or the optical path of the observation system, and anterior ocular segment observation is performed. A conversion element driving unit that separates the color temperature conversion element from the optical path of the illumination system or the optical path of the observation system when the mode is switched; an intraocular observation mode and an anterior eye observation mode by the mode switching unit Light source voltage control means for changing the voltage of the light source composed of the halogen bulb in conjunction with the switching of the light source, and optimizing the illuminance of the illumination light for the eye of the subject's eye and the illumination light for the anterior eye. A stereo microscope characterized by the following.