JPH0368357A - Laser therapeutic device for ophthalmology - Google Patents

Abstract

PURPOSE:To improve the focusing performance for a remedied part of the eye after operation by selecting one among a plurality of aiming beam generating light sources having different color and superposing said light source onto the laser beam for therapy. CONSTITUTION:Light sources 21, 22, and 23 for generating the aiming beams having different color are installed in correspondence with dichroic mirrors 18, 19, and 20, and the aiming beam generating light sources 21, 22, and 23 are controlled by a laser driving circuit 24. The dichroic mirrors 18, 19, and 20 transmit laser light K for therapy and possess the function for reflecting the aiming beam R, and retreated from a light path Q in the ordinary case. When one among the selecting buttons is pushed, the corresponding dichroic mirror is inserted into the optical path Q, and the corresponding aiming beam generating light source is driven by a laser driving circuit 24, and the aiming beam R having the selected color is reflected by the dichroic mirror, and superposed to the laser beam K for therapy.

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, in ophthalmic laser treatment devices, an aiming beam is superimposed on a therapeutic laser beam, the aiming beam is used to aim at the treatment area, and the therapeutic laser beam is irradiated 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 He-Ne beam that generates a red aiming beam is used.
A laser is used as a light source to generate the 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.

(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 macula 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 user's preference regarding color.

The present invention has been made in view of the above circumstances, and its purpose is to provide an ophthalmic laser treatment device that can be expected to further improve the aiming performance of the treatment area of the surgical eye.

(Means for Solving the Problems) In order to achieve the above object, an ophthalmic laser treatment device according to the present invention includes a plurality of aiming beam generating light sources that generate aiming beams of mutually different colors, and a plurality of aiming beam generating light sources that generate aiming beams of mutually different colors. Aiming beam generation light source driving means for selecting one of the aiming beam generation light sources and driving the aiming beam generation light source to superimpose the aiming beam of the selected color on the treatment laser beam. It is equipped with the following.

(Function) According to the ophthalmic laser treatment device according to the present invention, when one of the plurality of aiming beam generating light sources is selected depending on the treatment area of the surgical eye or according to preference, the selected color is The aiming beam is superimposed on the therapeutic laser beam and irradiated onto the surgical eye.

(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 an ophthalmic laser treatment apparatus according to the present invention, and in this figure, 1 is the main body of the laser treatment apparatus. This laser treatment device body 1
has a key switch 3 for turning on the power on its front panel 2.
, a ready switch 4, an irradiation time setting button 5, an output display section 6, an output setting knob 7, and a laser output check switch 8 are provided. A hand piece 10 is connected to the laser treatment device main body 1, and a foot-type irradiation switch 11 for emitting the irradiation laser beam P.
is connected. Note that 12 is an insertion section of the hand piece 10, and the insertion section 12 has an optical fiber 13 (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 light source 14 for generating a therapeutic laser beam K therein. The therapeutic laser light emitted from the therapeutic laser light source 14 is guided to a condensing lens 16 and condensed, and guided to the input end 17 of the optical fiber 13 of the insertion section 12.

Between the therapeutic laser light source 14 and the condensing lens 16,
Dichroic mirrors 18, 19, and 20 are insertably provided in the optical path Q of the therapeutic laser beam. An aiming beam R is superimposed on the therapeutic laser beam K, and 21, 22, and 23 are aiming beam generating light sources. The aiming beams R are different in color from each other.

The aiming beam generating light source 21, 22, 23 has its dichroic mirror 18, 19. 20, and here, a laser light source is used as the aiming beam generating light source 21, 22, 23. Its aiming beam generation light source 21.22.23
is controlled by a laser drive circuit 24, which functions as an aiming beam generation light source drive means.

The dichroic mirrors 18, 19, and 20 have the function of transmitting the therapeutic laser beam K and reflecting the aiming beam R, and are manufactured in accordance with the wavelength of each aiming beam R. Dichroic mirror 18.19.20
is normally evacuated from the optical path Q, and when any one of the selection buttons 25, 26, and 27 shown in FIG. 2 is operated, the dichroic mirror corresponding to the operated selection button is inserted into the optical path Q. At the same time, the aiming beam generating light source corresponding to the operated selection button is driven by the laser drive circuit 24, and the aiming beam R of the selected color is reflected by the dichroic mirror and superimposed on the therapeutic laser beam K. .

FIG. 3 shows a second embodiment of the ophthalmological treatment apparatus according to the present invention, in which a dichroic mirror 28 is fixedly provided on the optical path Q of the therapeutic laser beam, and an aiming beam generating light source is provided on a rotary disk 29. The rotary disc 29 is rotated by operating a single selection button (not shown), and the selected LED is set at a position corresponding to the dichroic mirror 28. The configuration is such that the L
The image of ED30 is created by collimating lens 15 and condensing lens 16.
is formed on the incident end face F of the optical fiber 13 by
As a result, the aiming beam R is superimposed on the therapeutic laser beam K.

FIG. 4 shows a third embodiment of the ophthalmic treatment apparatus according to the present invention, in which a regular tetrahedral reflecting prism 31 is provided between a collimating lens 15 and a condensing lens 16. A through hole 32 is formed in the direction of the main axis of this reflective prism 31, and the therapeutic laser beam is guided to the condensing lens 16 through this through hole 32, and the laser beam is guided to the condensing lens 16 through the through hole 32. Four LEDs 34 are provided obliquely to the optical path Q as a light source for generating an aiming beam.

According to this third embodiment, the selected aiming beam R is reflected by the reflecting surface 33, guided to the condensing lens 16, and condensed by the condensing lens 16, and is focused on the optical fiber 1.
It is superimposed on the therapeutic laser beam K at the incident end face 17 of No. 3.

FIG. 5 shows the fourth part of the ophthalmic laser treatment device according to the present invention.
An example is shown, and L as an aiming beam generation light source is shown.
The ED 35 and the condenser lens 36 are provided near the condenser lens 16 to superimpose the aiming beam R on the oblique light K, and the LED 3
5 is installed obliquely to the optical path, and the condenser lens 36 is L.
It has a function of forming an image of the ED 35 on the incident end surface 17.

FIG. 6 shows the fifth part of the ophthalmic laser treatment device according to the present invention.
This embodiment shows a configuration in which the aiming beam R emitted from the LED 37 is guided to the incident end face 17 using a condensing lens 16 for condensing the therapeutic laser beam K, and the condensing lens 16 is an LED similar to the fifth embodiment
It has a function of forming an image of 37 at the entrance end 17, and is thus configured to superimpose the aiming beam R on the therapeutic laser beam K.

(Effects) Since the ophthalmologic laser treatment device according to the present invention is configured as described above, it has the effect that it can be expected to further improve the aiming performance of the treatment area of the surgical eye.

[Brief explanation of drawings]

FIG. 1 shows the first part of the ophthalmic laser treatment device according to the present invention.
FIG. 2 is an external view of the ophthalmic laser treatment device according to the present invention, and FIG. 3 is a second diagram of the ophthalmologic laser treatment device according to the present invention.
FIG. 4 is a main part optical diagram showing an embodiment of the present invention.
FIG. 5 is a main part optical diagram showing an embodiment of the present invention.
FIG. 6 is a main part optical diagram showing an embodiment of the present invention.
FIG. 2 is a main part optical diagram showing an example. 14...Treatment laser light source 21.22.23...Aiming beam generation light source 2
4...Laser drive device 25.26.27...Selection button Q...Optical path P...Irradiation laser light K...Treatment laser light R...Aiming beam 3 Figure 1 Figure q Figure 7

Claims (1)

[Claims] (1) A plurality of aiming beam generation light sources that generate aiming beams of different colors, and an aiming beam of the selected color by selecting one of the plurality of aiming beam generation light sources. An ophthalmic laser treatment device comprising: an aiming beam generation light source drive means for driving an aiming beam generation light source to superimpose the beam on a therapeutic laser beam;