JP3514484B2 - Surgical microscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION The present invention relates to a plurality of different wavelengths.
The present invention relates to a surgical device using light. [0002] 2. Description of the Related Art In an operation using a surgical microscope, for example,
There are brain surgery and ophthalmic surgery.
There is surgery on the bottom of the body (so-called vitreous surgery). Glass
At the bottom of the body, the retina, choroid, and sclera form layers in this order from the vitreous side.
It has a multilayer structure. At the time of the vitreous surgery, the subject's eye (patient's eye)
There are three holes called ports on the side. this
One of the three ports is used to maintain intraocular pressure,
One of the other two ports has an optical fiber for lighting
Used to insert, one to insert surgical tools
Used for And for surgery, optical fiber
Illuminate the retina at the bottom of the vitreous body with
While observing the target part (affected part),
Perform surgery. [0004] Problems to be solved by the invention
In operation, lighting is performed with visible light, but visible light is
Because it is absorbed by the membrane epithelium,
It is not possible to observe the affected area under the retina.
Was. In this way, only visible light is used to observe the fundus of the subject's eye.
Observations were also limited. Accordingly, the present invention providesVisible with left and right optics
It is possible to superimpose the image by light and the image by infrared fluorescence
Surgical microscopeThe purpose is to provide
is there. [0006] SUMMARY OF THE INVENTION In order to achieve this object,
Therefore, the invention of claim 1 isGuides light from a light source to a predetermined location
An illumination optical system for illuminating the object, and reflected light from the predetermined portion
Main observation optical system with left and right optical systems
Optical path of the left and right optical systems
Are respectively arranged in the left and right from the predetermined portion.
Only the infrared fluorescent light incident on the optical system is
An electronic device equipped with a dichroic mirror to be taken out of the road
Guided by an imaging optics and each of the electronic imaging optics
TV for infrared image capturing that receives reflected light from a predetermined site
A camera and an image of a predetermined portion taken by the TV camera.
A pair of display means for projecting, and the left and right optical systems
Are provided so as to be inserted and removed in the middle of the optical path of the
The infrared fluorescence image of the predetermined portion projected by the means
Guided by the eyepieces of the left and right optical systems, the infrared light
The image of the predetermined part can be stereoscopically viewed, and
Stereoscopic view of the image of the predetermined site with visible light by the optical system of
To enable a stereoscopic image of the predetermined portion with infrared light.
Half that overlaps the image by visual light and enables stereoscopic viewing at the same time
A mirror is provided. [0007] [0008] [0009] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
explain. [First Embodiment] <Structure of surgical microscope> In FIG.
Eye, C is the cornea of the eye E, L is the lens, and CL is the cornea C.
The contact lens applied, S is the vitreous body of the eye to be examined, Ef
Is the fundus of the eye E (the bottom of the vitreous body). This fundus Ef
(Predetermined site) is a layer of retina M1, choroid M2, and sclera M3
Are provided in this order. K is a medical entity for observing the observation site.
It is a microscope. This medical stereo microscope K has an observation optical system 2,
It has electronic imaging optical systems 4 and 4 ′ (fluorescent optical system). Observation
The optical system 2 is composed of two main optical paths, left and right, for binocular vision.
And optical systems 2a and 2b. The optical system 2a includes an objective lens 13, a variable power lens,
30, dichroic mirror 80 (light separating means),
Ick return half mirror 81, imaging lens 32, positive
Standing prism 33, rhombic prism 34 for adjusting eye width, eyepiece
The lens 35 is provided in this order. The optical system 2b has an objective lens similarly to the optical system 2a.
Lens 13, variable power lens 40, dichroic mirror 80
', Quick return half mirror 81', imaging lens
42, an erect prism 43, a pupil adjustment prism 44,
An eyepiece 45 is provided in this order. The dichroic mirrors 80 and 80 '
The center wavelength is 820 nm and the width is
Reflects infrared light in a wavelength range of about 40 nm and is visible
Light is transmitted. And at the observation site
The image to be observed due to the reflected light from the fundus Ef
It is observed by both eyes of the operator via 2a and 2b. The electronic imaging optical system (fluorescent optical system) 4 is a die
Croic mirror 80, imaging lens 60, oblique mirror 9
0 in this order. Then, the light is reflected by the oblique mirror 90.
The incident light enters a TV camera 91 for taking an infrared fluorescent image,
Image to be observed in area CCD 91a (imaging means) of camera 91
Is imaged. Similarly, electronic imaging optical system (fluorescent optical system)
4 ′ is a dichroic mirror 80 ′ and an imaging lens 60
′, And an oblique mirror 90 ′ in this order. And obliquely
The light reflected by the mirror 90 'is a TV camera for infrared fluorescent image photography.
To the area 91 of the TV camera 91 '.
a '(imaging means) forms an image to be observed. Images from the left and right TV cameras 91 and 91 '
The image signals are input to the left and right image processing circuits 92 and 92 ', respectively.
The image processing circuits 92 and 92 ′ are connected to the TV camera 9.
Process the image signal from 1,91 'and output the video signal
You. The video signals from the left and right image processing circuits 92, 92 '
No. is CCU (Control Circuit Unit) immediately
Red is stored in the image memories 160 and 161 via the control circuit 66.
External fluorescence image data is input. This control circuit 6
Reference numeral 6 denotes an image based on the video signal from the left image processing circuit 92.
A plurality of frame memories a, b, c,.
・ Video data such as infrared fluorescent images and aiming spot light images
To build data. The control circuit 66
Is an image based on the video signal from the right image processing circuit 92 '.
A plurality of frame memories a, b, c,.
・ Image data such as infrared fluorescent image and aiming spot light image
Data is being built. The control circuit 66 is provided with the image memory 16
Monitor data based on the infrared fluorescent image data from
Observed parts from TV cameras 91 and 91 'on the left and right sides of Levi 67
The infrared fluorescent image is projected. On the other hand,
The image signals from the memories 160 and 161 are supplied to the image processing circuit 9.
The liquid crystal displays 93, 93 '(table
Indicating means), and the liquid crystal displays 93 and 93 '
Shows an infrared fluorescent image (display image). The red light from one of the liquid crystal displays 93
Outside fluorescent image is oblique mirror 94, quick return half
The display optical system 95 including the mirror 81 and the optical system 2a
Imaging lens 32, erect prism 33, rhombus for adjusting interpupillary distance
It is guided to the eyepiece 35 via the prism 34. same
, The infrared fluorescent image from the other liquid crystal display 93 '
Is the oblique mirror 94 ', quick return half mirror
81 'of the display image optical system 95' and the optical system 2b
Imaging lens 42, erect prism 43, rhombus for adjusting interpupillary distance
It is guided to the eyepiece 45 via the prism 44. <Structure of Light Irradiation System> The light irradiation system has different wavelengths.
Light sources and aiming with different wavelengths
It has a light source. As the illumination light source, a curve f1 in FIG.
Halogen containing wavelengths from visible to infrared as shown in
Lamp 100 (white light source, ie, visible light source)
And a laser diode LD1 having an oscillation wavelength of 780 nm
(Infrared illumination light source or infrared laser light source)
ing. As an aiming light source, an oscillation wavelength
Is a 514 nm argon laser unit 101 (visible
A laser light source, ie, a visible illumination light source) and an oscillation wavelength of 8
20 nm laser diode LD2 (infrared laser light
(I.e., an infrared illumination source). The light irradiation system is provided with a plurality of illumination light sources.
An illumination optical system 110 for guiding illumination light to the subject's eye;
Aiming to guide light from the aiming light source to the subject's eye
It has an optical system 120. (Illumination optical system 110) Illumination optical system 110
Is an optical fiber 111 (light guiding fiber, lighting
Optical fiber), dichroic mirror 112 (for optical path)
Split member), condensing lens 113 and concave reflecting mirror 114
You. The dichroic mirror 112 has a curve f in FIG.
As shown in 4, light in the infrared wavelength range of 760 nm or more
And reflects visible light. The illumination from the halogen lamp 100
The light is reflected and condensed by the concave reflecting mirror 114 while being
After passing through the Croic mirror 112, the optical fiber 11
1 is incident on one end 111a. one
On the other hand, the laser light from the laser diode LD1 is collected.
Dichroic while being condensed via optical lens 113
Optical fiber 1 after being reflected by
11 is made to be incident on one end 11a. The optical fiber 111 is connected to the eye E
Is inserted into the vitreous body S from the port P1 provided on the side of
The illumination light incident on the optical fiber 111
The light is radiated from the surface 11b toward the fundus oculi Ef to illuminate the fundus Ef. (Aiming optical system 120) Aiming light
The science system 120 includes an optical fiber 121 (optical guiding fiber).
ー, optical fiber for laser), dichroic mirror
122 (optical path dividing member) and a condenser lens 123.
This dichroic mirror 122 is represented by a curve f5 in FIG.
As shown, the center wavelength is 820 nm and the wavelength width is
It reflects light in the wavelength range of about 40 nm and also
Is transmitted. Then, the argon laser unit 101
Is transmitted through the dichroic mirror 122
To be incident on one end 121a of the optical fiber 121.
It is like. On the other hand, the laser diode LD2
These laser beams are focused through a focusing lens 123.
While being reflected by the dichroic mirror 122
After that, it is incident on one end 121a of the optical fiber 121.
It is like being able to. The optical fiber 121 is connected to the eye E
Is inserted into the vitreous body S from the port P2 provided on the side of
And the illumination light incident on the optical fiber 121 is the other end 1
21b is irradiated toward the fundus oculi Ef and irradiates the fundus Ef
You. <Control Circuit> The above laser diode L
D1, LD2, halogen lamp 100, argon laser
Unit 101 is operated by the arithmetic and control circuit 130 of FIG.
It is controlled dynamically. This operation control circuit 13
0: illumination mode changeover switch 131, laser coagulation
Switch 132 and quick return half mirror 81
Mirror driving device 133 that drives insertion and removal to and from the optical path is connected
Have been. Next, a surgical apparatus having such a configuration is provided.
The operation of the surgical device will be described. (1). Visual observation Illumination with visible light by illumination mode switch 131
When the mode is selected, the arithmetic and control circuit 130
While the argon laser unit is turned on.
101 and argon laser unit 1
01 is set to a low level. In addition, this
In this case, the arithmetic control circuit 130 controls the mirror driving device 133.
To control the quick return half mirrors 81 and 81
Remove from the middle of the optical path of academic systems 2a and 3a. Thereafter, the other end 11 of the optical fiber 111
The tip of 1b is separated from the fundus Ef of the eye E as shown in FIG.
On the other hand, the other end 121b of the optical fiber 121 is fixed to the fundus Ef.
Move closer to the treatment site. As a result, the halogen lamp 100
After the visible illumination light is reflected by the concave reflecting mirror 114,
Optical fiber 1 transmitted through dichroic mirror 112
And the other end 111 of the optical fiber 111
b to the fundus oculi Ef of the eye E to be examined.
Illuminate a fixed area with visible light. On the other hand, the argon laser unit 101
Low-level intensity laser with wavelength of 514nm emitted from
After passing through the dichroic mirror 122, the light
The optical fiber 121
Irradiation is performed from the end 121b toward the fundus oculi Ef to cure the fundus oculi Ef.
Spot light will be applied to the treatment site. The illumination from the fundus oculi Ef due to such illumination of the fundus oculi Ef
Part of the visible reflected light is the vitreous S, lens L, cornea C,
Contact lens CL, objective lens 13, variable power lens 3
0, dichroic mirror 80, imaging lens 32, erect
Through a prism 33 and a rhombic prism 34 for adjusting the interpupillary distance
It is guided to the eyepiece 35. On the other hand, this visible reflected light
The remaining part is the vitreous body S, lens L, cornea C, contactor
Lens CL, objective lens 13, variable power lens 40, die
Croic mirror 80, imaging lens 42, erect prism
43, eyepiece through a rhombic prism 44 for eye width adjustment
45. Therefore, the surgeon needs the eyepieces 35 and 45
By looking in, the illumination area of the fundus oculi Ef is expanded as shown in FIG.
It can be seen very much in three dimensions. (2). Infrared fluorescence observation On the other hand, ICG (indocyanine green) is intravenously administered to the patient.
Inject. Further, the lighting mode changeover switch 131
When the illumination mode using infrared excitation light is selected,
The circuit 130 is operated with the halogen lamp 100 turned on.
While turning on the laser diode LD1,
Turn off the user unit 101 and turn on the laser diode
Light LD2. At this time, the arithmetic control circuit 130
By controlling the mirror driving device 133, the quick return
In the optical path of the optical systems 2a and 3a.
insert. Thereafter, the other end 11 of the optical fiber 111
The tip of 1b is separated from the fundus Ef of the eye E as shown in FIG.
On the other hand, the other end 121b of the optical fiber 121 is fixed to the fundus Ef.
Move closer to the treatment site. Thus, the halogen lamp 100
After the visible illumination light is reflected by the concave reflecting mirror 114,
Optical fiber 1 transmitted through dichroic mirror 112
And the other end 111 of the optical fiber 111
b to the fundus oculi Ef of the eye E to be examined.
Illuminate a fixed area with visible light. At this time, the laser diode LD1
The 780 nm infrared excitation light is condensed by the condenser lens 113 and the die.
Via the croic mirror 112 and the optical fiber 111
It is irradiated on the fundus Ef. This allows ICG to be administered intravenously
When reaching the capillaries of the fundus oculi Ef, this ICG is 780
nm infrared excitation light is absorbed, and ICG is excited.
800 nm or less centered at 820 nm from ICG
The upper infrared fluorescence is emitted. In FIG. 2, f2 is ICG.
And f3 represents the infrared light of wavelength f2.
Of infrared fluorescence emitted from ICG when more excited
It shows a wavelength range. On the other hand, the light is emitted from the laser diode LD2.
The laser light having a wavelength of 820 nm is
3, dichroic mirror 122, optical fiber 121
Is irradiated to the fundus oculi Ef through the
Lighting. The illumination from the fundus oculi Ef accompanying such illumination of the fundus oculi Ef
Reflected light (visible illumination reflected light, infrared excitation reflected light, infrared fluorescent light,
Part of the infrared aiming reflected light)
Surgical microscope via L, cornea C and contact lens CL
The light enters the mirror optical system 2a. Further, the illumination mode changeover switch 131
When the illumination mode using infrared excitation light is selected, halogen
With the lamp 100 turned off, only the infrared fluorescent image can be observed.
You may do it. In this case,
Fmirror 81 is replaced by a total reflection quick return mirror
Thus, a clearer fluorescent image may be observed. (Optical system 2a) Light reflected from the above-mentioned fundus
Is a dichroic lens through the objective lens 13 and the variable power lens 30.
You will be guided to the Ick mirror 80. And this variable
Visible reflected light and infrared excitation
The reflected light is a dichroic mirror 80, Quick Rita
After passing through the half mirror 81, the imaging lens 32,
Through an erect prism 33 and a rhombic prism 34 for adjusting the interpupillary distance
And guided to the eyepiece 35. This allows for surgical
For the observer of the microscope, the fundus blood vessel image G is observed as shown in FIG.
Is done. On the other hand, the reflected light transmitted through the
Infrared fluorescence and aiming reflected light of 800nm or more
Represents one dichroic mirror 80 and the imaging lens 6
0, incident on the TV camera 91 via the oblique mirror 90,
Infrared fluorescent light enters the area CCD 91a (imaging means) of the TV camera 91.
The light image (observed image) and the aiming spot light image are formed
You. The image signal from the TV camera 64 is
The image processing circuit 92 is input to the image processing circuit 92.
Process image signal from TV camera 64 and output video signal
I do. The video signal from the image processing circuit 92 is
(Control circuit unit), ie control circuit 6
6 and the control circuit 66 generates an image based on the video signal.
Any of the frame memories a, b, c,... Of the memory 160
Image data such as infrared fluorescent images and aiming spot light images
Build. The control circuit 66 has an image memory 160
Infrared memory built in frame memories a, b, c, ...
Based on video data such as light images and aiming spot light images,
One of the left and right sides of the TV
An infrared fluorescent image of the observation site is displayed. Meanwhile, TV camera 9
1 is supplied to one of the liquids through an image processing circuit 92.
Input to the crystal display 93 (display means),
The spray 93 has infrared fluorescence as shown in FIG.
The fundus blood vessel image G ′, the choroidal blood vessel, and the
Fluorescent image (display image) Q and aiming spot light due to leakage
An image EP is displayed. The fundus blood vessel image G 'and the fluorescent image Q
And the spot light image EP overlaps the fundus blood vessel image G in FIG.
In addition, it is observed as shown in FIG. The red light from one of the liquid crystal displays 93
Outside fluorescent image is oblique mirror 94, quick return half
Display image guide optical system 95 including mirror 81 and optical system
2a imaging lens 32, erect prism 33, eye width adjustment
Is guided to an eyepiece 35 through a rhombic prism 34 of
You. (Optical system 2b) Similarly, of the fundus reflected light,
Reflected light incident on the optical system 2b (visible illumination reflected light, infrared excitation
(Reflected light, infrared fluorescent light, infrared aiming reflected light)
The objective lens 13 and the zoom lens
To the dichroic mirror 80 'through the lens 40
Is done. Then, the reflected light from the variable power lens 40
Visible reflected light and infrared-excited reflected light are dichroic
Through the mirror 80 'and the quick return half mirror 81'.
After passing through, the imaging lens 42, the erect prism 43, the interpupillary tone
Guide to eyepiece 45 via rhombic prism 44
Is done. This allows the observer of the surgical microscope to observe the fundus blood.
The tube image G is observed as shown in FIG. On the other hand, the reflected light transmitted through the
Infrared fluorescence and aiming reflected light of 800nm or more
Is the other dichroic mirror 80 'and the imaging lens 6
0 ', the other TV camera 91' via the oblique mirror 90 '
To the area CCD 91a 'of the TV camera 91'
Imaging means) to form an infrared fluorescent image (observed image). The image signal from the TV camera 91 ′ is
Of the image processing circuit 9 '
2 ′ processes an image signal from the TV camera 91 ′ and outputs a video signal.
Output a signal. The image from the other image processing circuit 92 '
The image signal is the CCU (control circuit unit)
G) That is, it is input to the control circuit 66, and the control circuit 66
A frame memory a of the image memory 161 based on the video signal,
Infrared fluorescent image or aiming spot
Image data such as light images are constructed. The control circuit 66 has an image memory 161
Infrared memory built in frame memories a, b, c, ...
Based on video data such as light images and aiming spot light images,
The TV camera 91 '
An infrared fluorescent image of the observation site is displayed. Meanwhile, TV camera
The image signal from 91 ′ is supplied to the other
Is input to the liquid crystal display 93 '(display means) of
As shown in FIG. 5B, the infrared display
Fundus blood vessel image G ′ and infrared fluorescent image (display image) Q
An imaging light beam EP is projected. This fundus blood
The tube image G ', the fluorescent image Q and the spot light image EP are shown in FIG.
It is observed as shown in FIG.
You. From the other liquid crystal display 93 ',
The infrared fluorescent image is obtained by oblique mirror 94 'and the other quick
Display image guiding optical system 95 comprising a half mirror 81 '
', The imaging lens 42 of the optical system 2b, the erect prism 4
3. Eyepiece via rhombic prism 44 for eye width adjustment
Guided to 45. As described above, the image memories 160 and 161
Fundus blood vessel image G ′, fluorescence image Q, and aiming light due to fluorescence
Construct video data of image EP in image memories 160 and 161
By doing so, even when there is no aiming light,
A specific part is superimposed only by switch operation as shown in Fig. 5 (c).
You can see the pose. The same image as this image
It is also displayed on the monitor TV 67. (3). Laser coagulation of the fundus Observation using such a surgical microscope (1) or (2)
Diseased areas in the fundus oculi Ef and retinal epithelium are three-dimensionally observed.
You. At this time, retinal detachment and diseases of the lower layer of the retina were confirmed.
The aiming light at a predetermined site while observing
Irradiate. In this state, the arithmetic and control circuit 130
-When the coagulation switch 132 is turned on, the argon laser
The laser emission intensity of the unit 101 is necessary for photocoagulation of the fundus.
Argon laser unit 10
1 emits a laser beam. This argon laser
The laser light for photocoagulation from the unit 101 is
After passing through the Loic mirror 122, the optical fiber 12
1 and the other end 121b of the optical fiber 121.
From the eye to the fundus Ef, the aiming light of the fundus Ef
Photocoagulate the irradiated treatment site. In addition, infrared
When the laser coagulation switch 134 is turned on, the laser die
Laser light from laser diode LD2 has a photocoagulation level
Is set to reach a degree. This allows the retinal depth
The layers can be directly photocoagulated. [Second Embodiment] In the embodiment described above,
Argon laser when illuminating the fundus with Logen lamp 100
-Let the unit 101 aim the treatment site
However, the present invention is not necessarily limited to this. For example, as shown in FIG.
A light extraction hole 114a in the concave reflecting mirror 114,
The light emitted from the light extraction hole 114a is extracted, and
Light may be used as aiming light. At this time, light extraction
The light extracted from the hole 114a is collected by the light guiding means Lf.
Optical lens 140, optical fiber 141, half mirror 1
Incident on one end 121a of the optical fiber 121 via
Aimin from the other end of the optical fiber 121 to the fundus Ef
And irradiate it as light. In this embodiment, an argon laser unit
Control of the laser emission intensity of 101
And only argon for observation with visible light.
The laser unit 101 emits aiming light
It does not need to be used. Other operations are the same as those of the first embodiment. [Third Embodiment] FIG. 7 shows a third embodiment of the present invention.
This is an example. In this embodiment, one optical fiber
-150 for fundus illumination light, aiming light and photocoagulation
Shows an example of guiding user light to the fundus Ef
It is. In this embodiment, an argon laser unit
Halfway along the optical path from 101 to optical fiber 150
Mirror 151, dichroic mirror 122 (optical path splitting unit)
Materials). Moreover, the mirrors 151 and 12
A long focal point condenser lens 152 is disposed between the two. The visible light from the halogen lamp 100
The bright light is reflected and condensed by the concave reflecting mirror 114, and is condensed.
After passing through the Ick mirror 112, the half mirror 151
At the optical fiber 150. Moreover, the laser diode LD1
Light was reflected by dichroic mirror 122
Then, while being condensed by the condensing lens 152, a half mirror
Through the optical fiber 150
It is. In such a configuration, an argon laser
From the unit 101 or the laser diode LD2
Focusing lens with long focal point as shown in Fig. 7 (a)
At 152, it is made incident on one end of the optical fiber 150.
Aimin emitted from the other end of the optical fiber 150
The luminous flux EO is spotted on the fundus oculi Ef in a thin state.
You. On the other hand, halogen lamp 100 and laser diode
The illumination light from the laser diode LD1 is transmitted to the concave reflector 114 having a short focal length.
Or the optical fiber 1 focused by the focusing lens 113.
As shown in FIG.
The illumination light flux S emitted from the other end of the fiber 150 is shown in FIG.
As shown in (b), a wide range of the fundus oculi Ef is illuminated. In this embodiment, the laser diode LD
1, LD2, halogen lamp 100, argon laser
The units 101 and the like are controlled in the same manner as in the second embodiment.
The description of the control is omitted. According to this embodiment, the light guiding fiber
Need only use one optical fiber 150,
The burden on the eye E during surgery can be reduced. Even in this case, the aiming light is turned into a laser.
When used for photocoagulation of the fundus, the optical fiber 15
Operate so that the tip of 0 is close to the fundus. In addition,
When the tip of the fiber 150 is sufficiently separated from the fundus,
The imaging light can be used as fundus illumination light. [Other Embodiments] In the embodiments described above,
Observation of the fundus with visual light and observation of the fundus with infrared fluorescence
Although an example was shown, the fundus observation with infrared light and
Observing the inside of the retinal epithelial layer with visible fluorescence
May be. That is, in the first embodiment, visible fluorescence excitation
Exciter filter for concave reflector 114 and die
When it is arranged so that it can be inserted into and removed from the Croic mirror 112,
In both cases, the dichroic mirror 80 of the optical systems 2a and 2b
Visible fluorescent wave between the quick return half mirror 81
Barrier filter that transmits long visible light can be inserted and removed.
Set up. On the other hand, the laser diode LD1
-The emission wavelength of light is the emission wavelength of laser diode LD2.
Illumination light from laser diode LD1
Illuminate the fundus with the laser diode LD2
Illuminate the fixed part with a small aiming spot light,
The illumination state by the infrared light of FIG.
Take a picture at 91 'to change the fundus illumination state and aiming state
The monitor TV 67 and the liquid crystal display of the embodiment of FIG.
Observation may be performed using 93, 93 '. In this case, the optical path of the exciter filter
Insertion and removal of the barrier filter into and out of the optical path
To do. The dichroic mirrors 80 and 80 '
Is the infrared light of the wavelength emitted from the laser diode LD1.
Transmits the laser beam and from the laser diode LD2
It is designed to reflect the laser beam of the emitted wavelength
However, the present invention is not necessarily limited to this. example
The dichroic mirrors 80 and 80 'transmit the visible flux
And set the optical characteristics to reflect infrared light.
And the dichroic mirrors 80, 80 'and TV camera
In the optical path between 91 and 91 ', a barrier for infrared fluorescence
The filter may be provided so that it can be inserted and removed. In this case, red
Observation of the fundus with external light and observation of the deep fundus with infrared fluorescence
And can be selectively performed. [0072] The present invention is configured as described above.
so,Image by visible light and image by infrared fluorescence with left and right optical systems
Can be superimposed and observed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of an optical system showing one embodiment of a surgical apparatus according to the present invention. FIG. 2 is a characteristic curve diagram showing a relationship between an absorption spectrum and an emission spectrum of the halogen lamp and ICG shown in FIG. FIG. 3 is a characteristic curve diagram of the dichroic mirror shown in FIG. FIG. 4 is a control circuit of the device shown in FIG. 5A is an explanatory diagram showing a fundus observation image of the apparatus shown in FIG. 1 using visible light and infrared fluorescence, FIG. 5B is an explanatory diagram showing a fundus observation image using infrared fluorescence of FIG. 1, (c) is an explanatory diagram in the case of observing the images of (a) and (b) in an overlapping manner. FIG. 6 is an explanatory view of a main part of an optical system showing a second embodiment of the present invention. FIG. 7A is an explanatory diagram of a main part of an optical system showing a third embodiment of the present invention, and FIG. 7B is an explanatory diagram showing a relationship between a light beam emitted from the other end of the optical fiber of FIG. It is. [Description of Signs] 2a, 2b: Optical system (observation optical system) 4, 4 ': Electronic imaging optical system (fluorescent optical system) 80, 80': Dichroic mirror (light separating means) 81, ': Quick return half mirror 91, '... TV cameras 91a, 91a' ... Area CCD (imaging means) 93, '... Liquid crystal display (display means) 95,95' ... Display optical system 100 ... Halogen lamp (white illumination light source, visible illumination light source) 101 ... Argon laser unit (visible laser light source, visible illumination light source) 110: illumination optical system 111: optical fiber (optical guide fiber, illumination optical fiber) 112: dichroic mirror (optical path splitting member) 120: aiming optical system 121: optical fiber (optical guide) 122, dichroic mirror (optical path splitting unit) ) 130 ... arithmetic control circuit 150 ... optical fiber (fiber for optical guidance) Ef ... fundus (predetermined portion) LD1, LD2 ... laser diode (infrared illumination light source,
Infrared laser light source) Lf: Light guiding means

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61F 9/007 A61B 3/14

Claims (1)

(57) [Claims] [1] Light from a light source is guided to a predetermined portion for illumination.
Illumination optical system, and reflected light from the predetermined portion enters
For surgery with main viewing optics with left and right optics
In the microscope, each of the right and left optical systems is disposed in the middle of the optical path,
The infrared fluorescent light incident on the left and right optical systems from the predetermined site
Dichroic to extract the light from the middle of the optical path of the left and right optical systems
An electronic imaging optical system having an Ick mirror and a predetermined portion guided by each of the electronic imaging optical systems.
A TV camera for capturing an infrared light image that receives reflected light, and an image of a predetermined portion captured by the TV camera are displayed.
And a pair of display means for projecting, and provided in the middle of the optical path of the left and right optical systems so as to be insertable and removable respectively.
And the infrared fluorescent light of a predetermined portion projected on the display means.
Guide the image by light to the eyepieces of the left and right optical systems
Make the image of the predetermined part by the infrared light stereoscopically visible
And visible light of the predetermined portion by the left and right optical systems.
The image by the three-dimensional view, the infrared light of the predetermined portion
Stereoscopic vision by superimposing the stereoscopic image and visible light image
Surgery characterized by providing a half mirror that enables
Microscope.