JPH0368356A - Laser therapeutic device for ophthalmology - Google Patents

Abstract

PURPOSE:To improve the focusing performance for the remedied part of the eye after operation by synthesizing a plurality of aiming beams and generating the aiming beam having the color different from the color of the aiming beam which is emitted from a luminous light source. CONSTITUTION:A reflection prism 16 is installed between a laser beam generating light source 12 for therapy and a condenser lens 14, and a through hole 17 is formed in the main axis direction, and the laser beam K for therapy is introduced into the condenser lens 14 through the through hole 17. Three LEDs 19 are installed aslantly for an optical path Q, in correspondence with each reflection surface 18 of the reflection prism 16, and driven by a driving circuit 20. An aiming beam R is reflected by the reflection surface 18 of the reflection prism 16, and introduced into the condenser lens 14, and collected by the condenser lens 14 and superposed with the laser beam K for therapy at the incidence edge of an optical fiber 11. Light illumination is performed by adjusting the light transmission quantity of each LED 19, and the color of the aiming beam used for focusing can be changed over a wide range according to desire.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an improvement in an ophthalmic laser treatment device that superimposes an aiming beam on a therapeutic laser beam and irradiates the surgical eye to treat the surgical eye. .

(Prior art) Conventionally, ophthalmological laser treatment devices have been designed to superimpose an aiming beam on a therapeutic laser beam, aim the treatment area using the aiming beam, and irradiate the therapeutic laser beam onto the surgical eye. An ophthalmic laser treatment device is known that performs the treatment of the surgically operated eye.

For example, in an ophthalmic laser treatment device that uses a near-red laser such as a YAG laser as a therapeutic laser beam, a red aiming beam is generated)
An e-laser is used as a light source for generating an aiming beam.

In addition, in ophthalmic laser treatment equipment that uses continuous wave argon laser or krypton laser as a therapeutic laser beam, the therapeutic laser beam is modulated to generate an aiming beam. The color of the aiming beam is green, and the color of the aiming beam for krypton lasers is red. Further, in the case of an ophthalmic laser treatment device using a dye laser, an aiming beam of any color from yellow to red is used.

(Problems to be Solved by the Invention) However, there are various treatment points in the surgical eye, and for example, if we consider the case where the retina is to be treated and a therapeutic laser beam is irradiated and aimed at the retina,
The macular area is yellowish red, the blood vessels are deep red, and the other parts are red.In any case, there is a problem in that it is difficult to see if a red aiming beam is used. Also, the color of the iris differs depending on the race, and if you fix it to a certain color, when performing surgery on the eye of a race whose iris is the same color as that color,
There is a problem in that it is difficult to identify the area to be treated.

By the way, the relative luminous efficiency of green is about 4 times that of red, so it may be sufficient to use a green beam as an aiming beam, but the absorption of green on the retina is greater than that of infrared, Since it is thought that there is little reflected green light at the top, it may not necessarily be preferable to use a green beam as the aiming beam.

Furthermore, there is also the issue of the operator's preference regarding the color of the aiming beam during aiming, and it is desirable to be able to select the color of the aiming beam as appropriate.

The present invention has been made in view of the above circumstances, and its purpose is to enable the color of the aiming beam to be appropriately selected over a wide range according to preference, and thereby to improve the treatment area of the surgical eye. An object of the present invention is to provide an ophthalmic laser treatment device that can be expected to further improve aiming performance.

(Means for Solving the Problems) The ophthalmic laser treatment device according to claim 1 of the present invention includes:
In order to achieve the above object, a therapeutic laser beam generating light source that generates a therapeutic laser beam, a plurality of aiming beam generating light sources that generate aiming beams of mutually different colors, and the plurality of aiming beams are provided. aiming beam generating light source driving means for driving each of the plurality of aiming beam generating light sources with variable output; and guiding the aiming beam to the optical path of the therapeutic laser beam and directing the aiming beam to the therapeutic laser beam. and an aiming beam superimposing optical member for superimposing the aiming beam, the plurality of aiming beams are combined with each other by the aiming beam superimposing optical member, and the aiming beam emitted from the aiming beam generating light source is combined with the aiming beam superimposing optical member. It is possible to generate an aiming beam with a color different from that of the beam.

The ophthalmic laser treatment apparatus according to claim 2 of the present invention is characterized by: a therapeutic laser beam generating light source for generating a therapeutic laser beam; a white light source generating white light; and emission from the white light source. a color separation optical member that separates the white light generated by the image to generate aiming beams of different colors; an intensity adjustment optical member that adjusts the intensity of the aiming beams of different colors; and an intensity adjustment optical member that adjusts the intensity of the aiming beams of different colors; An aiming beam superimposing optical member that combines beams and superimposes the aiming beam on the therapeutic laser beam.

(Function) According to the ophthalmic laser treatment apparatus according to claim 1 of the present invention, when at least two aiming beam generating light sources are driven, the two aiming beams emitted from the aiming beam generating light sources are are combined by an aiming beam superimposing optical member and superimposed on the therapeutic laser beam). Therefore, the surgeon can change the color of the aiming beam when aiming according to his/her preference, and can aim at the treatment area of the surgical eye using the aiming beam of the desired color.

Further, according to the ophthalmic laser treatment device according to claim 2 of the present invention, when the white light source is emitted, the white light is guided to the color separation optical member and separated into colors, and aiming beams of mutually different colors are produced. generated. The aiming beams of different colors are intensity-adjusted through an intensity-adjusting optical member, and then guided to an aiming beam superimposing optical member. As a result, aiming beams of different colors are combined, and the aiming beam of a desired color is superimposed on the therapeutic laser beam.

(Example) Hereinafter, an example of the ophthalmic laser treatment apparatus according to the present invention will be described with reference to the drawings.

FIG. 2 is a perspective view showing a schematic configuration of the ophthalmic laser treatment apparatus according to claim 1 of the present invention, and in this figure, 1 is the main body of the laser treatment apparatus. This laser treatment device main body 1 includes, on its front panel 2, a key switch 3 for powering on, a ready switch 4, an irradiation time setting button 5 for setting the irradiation time of the laser treatment beam, and an output for displaying the output of the laser treatment beam. A display section 6 and an output setting knob 7 for setting the output of the laser beam are provided.

A hand piece 8 is connected to the laser treatment device main body 1, and a foot-type irradiation switch 9 for emitting irradiation laser light P is also connected. In addition,
Reference numeral 10 denotes an insertion section of the hand piece 8, and the insertion section 10 has an optical fiber 11 (see FIG. 1) at its distal end in the insertion direction.

As shown in FIG. 1, this laser treatment apparatus main body 1 is provided with a therapeutic laser beam generating light source 12 for generating a therapeutic laser beam K therein.

The therapeutic laser beam emitted from the therapeutic laser beam generating light source 12 is guided to the condensing lens 14 and focused on the incident end face 15 of the optical fiber 11 of the insertion section 10.
guided by.

A reflective prism 16 in the shape of an equilateral triangular saw is provided between the therapeutic laser beam generating light source 12 and the condensing lens 14 . A through hole 17 is provided in the main axis direction of this reflecting prism 16.
is formed, and the through hole 17 is used for the treatment laser beam.
The light is guided to the condensing lens 14 through the condenser lens 14.

Each reflecting surface 18 of the reflecting prism 16 is constituted by a dichroic mirror.

Three LEDs 19 correspond to each reflective surface 18, and the light path Q
It is installed at an angle to the Here, these three LEDs 19 are assumed to emit red, yellow, and green light, and each LED 19 is driven by a drive circuit 20 as an aiming beam generation light source drive means. The laser treatment device main body 1 is provided with selection buttons 21, 22, 23, and the drive circuit 20 has a function of lighting up the LED 19 corresponding to the selection button 21, 22, 23. The drive circuit 20 is controlled by a light emission amount adjustment knob (not shown), and each L
The amount of light emitted from the ED 19 can be adjusted by the drive circuit 20.

Each LEDi 9 is used as an aiming beam generation light source, and the reflecting prism 16 functions as an aiming beam superimposing optical member that superimposes aiming beams R of mutually different colors on the therapeutic laser beam K.
The aiming beam R is reflected by the reflecting surface 18 and guided to the condenser lens 14.

The condensing lens 14 has a function of forming an image of the LED 19 on the light receiving end surface 15, and the aiming beam R is condensed by the condensing lens 14, and is directed to the incident end surface 1 of the optical fiber 11.
5, it is superimposed on the therapeutic laser beam K.

Therefore, by adjusting the amount of light emitted from each LED 19, each LED 19
By emitting light, it is possible to generate an aiming beam of a different color from the aiming beam R emitted from each LED 19, and the color of the aiming beam used for aiming can be changed over a wide range according to preference. .

FIG. 3 shows a second embodiment of the ophthalmic laser treatment apparatus according to claim 1 of the present invention, in which an LED 21 as an aiming beam generating light source and a condenser lens 22 are connected to the condenser lens 1.
4 for aiming beam therapy - laser beam K
The aiming beam R is superimposed on the LED 21, and the LED 21 emits different red light and green light, and the condenser lens 22 emits different red and green lights.
It functions as an aiming beam superimposing optical member that forms an image of D21 on the incident end surface 15 and superimposes the aiming beam R on the therapeutic laser beam K.

According to this second embodiment, the drive circuit 20 drives the LED 2
By appropriately adjusting the current flowing through 1, the aiming beam can be changed continuously from red to green.

FIG. 4 shows a third embodiment of the ophthalmic laser treatment apparatus according to claim 1 of the present invention, in which a laser beam K for treatment is emitted from an LED 23 using a condensing lens 14 for condensing it. The aiming beam R is guided to the incident end face 15, and here, the condenser lens 14 forms an image of the LED 23 on the incident end face 15 as in the second embodiment, and directs the aiming beam R to the incident end face 15. Aiming beam R
It functions as an optical member for superimposing the aiming beam.

FIG. 5 shows a first embodiment of the ophthalmic laser treatment apparatus according to claim 2 of the present invention, in which a white laser 24 is used as a light source for generating a laser beam for aiming, and the white laser 24 includes helium. −Cadmium (
A He-Cd) laser is used. The white laser beam emitted from this helium-cadmium laser is sent to a beam splitter 28 as a color separation optical member.
27. Guided to 28.

The beam splitters 26, 27, and 28 have a function of color-separating white light to generate aiming beams R of mutually different colors, and the beam splitter 26 reflects a light component having a blue wavelength of the white laser beam. The beam splitter 27 has a function of reflecting a light component having a green wavelength, and the beam splitter 28 has a function of reflecting a light component having a red wavelength. The light component with the blue wavelength is guided to the dichroic mirror 30 via the optical attenuator 29, the light component with the green wavelength is guided to the dichroic mirror 32 via the optical attenuator 31, and the light component with the red wavelength is guided to the dichroic mirror 30 through the optical attenuator 31. The light component containing the light beam is guided to a dichroic mirror 34 via an optical attenuator 33.

The attenuators 29, 31, and 33 function as intensity adjusting optical members that adjust the intensities of aiming beams of mutually different colors, and can continuously change the intensity of each light component.

The dichroic mirror 30 has a function of transmitting the therapeutic laser beam K and reflecting the blue light component, and the dichroic mirror 32 transmits the therapeutic laser beam K and the blue light, and reflects the green light component. The dichroic mirror 34 has the function of transmitting blue light and green light to the therapeutic laser beam and reflecting the red light component, and the dichroic mirrors 30, 32, and 34 have the function of adjusting the intensity. It functions as an aiming beam superimposing optical member that combines the aiming beam R and superimposes the aiming laser beam R on the therapeutic laser beam K.

Therefore, it is possible to generate an aiming beam of a desired color to be used for aiming based on the blue, green, and red aiming beams R.

FIG. 6 shows a second embodiment of the ophthalmologic treatment apparatus according to claim 2 of the present invention, in which the aiming beam generating light source is composed of an incandescent bulb 35, a reflector 36, and a collimator lens 25. , and other configurations are similar to those of the first embodiment, so detailed explanation thereof will be omitted.

(Effects) Since the ophthalmologic laser treatment device according to the present invention is configured as described above, the color of the aiming beam can be selected from a wide range according to preference, and it can be used for treatment of surgical eyes. This has the effect of further improving the aiming performance of the target location.

[Brief explanation of drawings]

1 is an optical diagram of a main part showing a first embodiment of the ophthalmic laser treatment device according to claim 1 of the present invention; FIG. 2 is an external view of the ophthalmologic laser treatment device shown in FIG. 1; The figure is an optical diagram of a main part showing a second embodiment of the ophthalmologic laser treatment apparatus according to claim 1 of the present invention, and FIG. 4 is a third embodiment of the ophthalmologic laser treatment apparatus according to claim 1 of the present invention. An optical diagram of a main part showing an example, FIG. 5 is an optical diagram of a main part showing a first embodiment of the ophthalmic laser treatment apparatus according to claim 2 of the present invention, and FIG. FIG. 2 is an optical diagram of main parts showing a second embodiment of the ophthalmologic laser treatment device of FIG. 12... Laser light source for treatment 16... Reflection prism, 14.22... Condensing lens 19.21.24.35... Beam generating light source for aiming 20... Drive circuit 21.22.23 ...Selection button Q...Light path P...Irradiation laser light K...Treatment laser light R...Aiming beam Fig. 1 Fig. 3 Fig. 2 Fig. 1L) O Fig. 4

Claims (2)

[Claims] (1) A therapeutic laser beam generating light source that generates a therapeutic laser beam, a plurality of aiming beam generating light sources that generate aiming beams of different colors, and a variable output of the plurality of aiming beams. an aiming beam generating light source driving means for driving each of the plurality of aiming beam generating light sources by using the aiming beam, and guiding the aiming beam into an optical path of the therapeutic laser beam and superimposing the aiming beam on the therapeutic laser beam. an aiming beam superimposing optical member, the plurality of aiming beams are combined with each other by the aiming beam superimposing optical member, and the aiming beam emitted from the aiming beam generating light source has a color. An ophthalmic laser treatment device characterized in that it is capable of generating aiming beams of different colors. (2) A therapeutic laser beam generating light source for generating a therapeutic laser beam, a white light source for generating white light, and an aiming beam of different colors obtained by color-separating the white light emitted from the white light source. an intensity adjusting optical member that adjusts the intensities of the aiming beams of different colors; and an intensity adjusting optical member that synthesizes the aiming beams with adjusted intensities and combines the aiming beams with the therapeutic laser beam. An ophthalmological laser treatment device comprising: an optical member for superimposing beams for superimposing aiming;